A brief introduction:Light source development history

Artificial light source has a long history of development. According to archaeological data, dating back about 700,000 to 200,000 years ago, the Paleolithic Peking Man has started to fire for life, burrowing primitive to rely on the bonfire lighting, then gradually learned to use a torch. Of historical records, lamps found in the legendary Yellow Emperor, "Zhou" specially make fire or lighting office, forming oil lamp in the Warring States period, followed by the invention of candles. 1878 American inventor Thomas Edison invented the modern lamp (incandescent), and quickly be widely used in the world, the lamp was introduced into China in the early 20th century. Tubular fluorescent advent in the 1930s, soon to be widely used, and an important source of lighting. 1970s Philips invented the compact fluorescent lamps (CFLs), now also gradually been widely used. The human electric light began in the 18th century. Early 19th century, the United Kingdom H. David invented the carbon arc lamp. In 1879, TA Edison invented the practical value of the carbon filament incandescent mankind from a long fire lighting into the era of electric lighting. 1907 as drawn tungsten incandescent body. 1912, United States I. Langmuir inflatable incandescent, improve the efficiency of incandescent light emitting and the prolongation of life, incandescent expanded range of applications. The early 1930s, the successful development of low pressure sodium. 1938, Europe and the United States developed the fluorescent led highbay light

, the luminous efficiency and lifetime are more than three times the incandescent lamp, which is a major breakthrough in the technology of electric light. High-pressure mercury lamp in the 1940s entered the practical stage. The end of the 1950s, the advent of very small volume and light fades tungsten halogen lamp to change the stagnant state of thermal radiation light source technology progress, which is the light source technology as a major breakthrough. Developed in the 1960s, metal halide lamps and high pressure sodium lamps, the luminous efficiency is much higher than the high-pressure mercury lamp.80 there have been slim diameter energy - saving compact fluorescent lamps, low - power high - pressure sodium lamps and low power metal halide lamp, the light source into small, energy - saving and delivery of the new era.

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LED lighting up lamp market prospects

LED (light emitting diode) is a rapid rise in recent years as a low-field-type electroluminescent semiconductor light-emitting device, a way to convert electrical energy into visible light semiconductor breakthrough incandescent tungsten light with energy-saving lamps three-color dye luminous the principle of the use of electric light emission. LED spectrum almost entirely concentrated in the visible light spectrum, the luminous efficiency of up to 80% -90%. Because of the long life, high luminous efficiency, low energy consumption, no radiation, no pollution characteristics, LED high bay light has been widely used in the field of lighting. Today, the high-power LED has been used extensively for automobile master brake lights, tail lights, turn signals, lights, instrumentation and interior lighting can also be used. In automotive lighting, it is estimated that by 2010, LED will occupy most of the taillights lighting (including down lights and license plate light). The all-LED design rear lights (taillights, brake lights and turn signals) has appeared in the 2000 model Cadillac and S-Class Benz, and other high-end car, LED can be car objects provide independent local lighting such as dome light, reading lights, grab handle, lock, switch, cup holder, seat belt buckle, mirrors, borders, etc., the increasingly widespread use. Lights (incandescent), compared with the traditional car, LED energy saving, long life, maintenance-free, explosion-proof, easy to control, and environmental advantages, plus LED luminescent own unique characteristics, so that the lamp shape does not deformed because of prolonged heat, thereby increasing the life of the entire unit. LED inherently has the advantages of small size, reduced the volume of the entire group of lamps, when applied to the front lights further so that the valuable space of the engine and other related equipment space. Existing halogen bulb design discharge lamps, and lights a total length of 300mm, and in many of the design of the concept car, LED highbay light only 125mm long. The advantages of small size, so that the headlight design is more flexible, and thus create a different body shape visual perception, broke the traditional circular design of the lights. In addition, due to the light-emitting speed faster than light bulbs, to quickly convey to the back of the vehicle brake information, help to improve traffic safety. Therefore, LED automotive lighting systems the revolutionary development opportunity. Currently widely used LED color blue, red and green, and white LED for car headlights just started. As technology improved, the brightness has been gradually increasing automobile headlamp white LED has a very good future. LED as a new light source alternative to the traditional incandescent light source is technically ripe. LED product market from the current point of view, however, the high cost of high brightness LED automotive lighting brightness requires a large number of LED demand will undoubtedly increase the cost of the light source. The application is only a small amount of imported luxury cars in the domestic car industry. However, with the development of LED products, industrial capacity increase of high-brightness LED, LED products prices there is a lot of decline in its good performance makes the LED light source will become the mainstream in automotive lighting products.

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China's accelerating the pace led Standards

Recently, the National Semiconductor lighting engineering specifications for development and Industry Alliance research and development of the first working conference held in Hangzhou. The meeting chaired by the Secretary - General of Wu Ling.Union president Zhang Rong, deputy director of the research and development executive chairman Li Jinmin, Nanjing University, Beijing University Professor Zhang guoyi 10 experts attended the meeting.The experts at home and abroad exchange the development of semiconductor lighting standards, focused on led street lamp test method and semiconductor lighting for the development of technical specifications technical specifications of the system of overall deployment.The meeting agreed to form a union, led street lamps technical specification of test method development group, the selection of Zhejiang University Ye guanrong?


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LED high bay make contributions to energy saving and emissio

After Sydney began the first energy saving lights for one hour in 2000, so far all over the world advocate the low carbon life. From the perspective of energy conservation, high quality, efficient products are the trends of the future products development.

Currently, Energy-saving lamps are known as incandescent lamp, but there is one kind of new energy saving lamp, that is LED high bay light.LED high bay lights do not contain led, mercury and other pollution elements, without any pollution to the environment.

Source from：http://www.lead-lighting.com

 

LD-HBL-200W-CL1+LED High Bay Light 200W

LD-HBL-100W-CL1+LED Highbay Light 100W

LED high bay provide the best light source for industrial

Compared with the ordinary lamp, the characteristic of led high bay lights is energy saving and environmental protection, and can provide you enough light but not damage the eyes. In the production of lamps design, we carry out the production standards strictly, and pay more attention to technical innovation. Our lamps were all successfully produced after repeated studies and experiments.

LED high bay  light is so widely used, because of its good characteristics: optimized radiating structure can guarantee the service life of the lamp; excellent explosion-proof make it widely used in outdoor site. In addition, there is another advantage, LED high bay lightsusing constant current and constant voltage control, wide voltage range (AC100V-240V) overcome the unstable light and noise pollution, to avoid eye stimulation and fatigue in working. We strive to provide the best LED lights for industrial operations.

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LED product knowledge summary

LED furniture, led highbay light, hotel lighting LED, LED lighting stores, and other areas of the individual attack, LED jewelry lighting, cabinet lighting, LED lamp LED warehouse more segmentation fields such as permeability plow deeper. LED has the light is downy, no stimulation, color is rich, small thermal radiation, easily hidden installation, etc. LED into LED display, LED lighting, LED backlight; Chip, encapsulation, application. LED lighting application products in (global), major is given priority to with family, accounts for about 39%, followed by the office and 18% of medical institutions, the third big market is outdoor lighting, about 12% of LED application of municipal engineering, backlit display, commercial lighting. LED lighting solutions, including lighting design, project construction management and late operation and maintenance, etc. Reasonable LED lighting design can improve the work efficiency and quality of life, unearthed LED other added value in addition to the energy saving, such as lights, modelling, etc advantages, the chang 'an grand theatre in Beijing using LED stage light, energy saving 80%, and more bright, also improve the traditional stage under the high temperature environment, LED lighting luminous characteristics than the traditional light source are easier to implement intelligent control, compared with the traditional energy-saving lamps, LED to add reasonable design move light at a lower cost, and the light is more stable, save power further, many LED application solutions including induction outside natural light environment automatic light adjustment function. Polycarbonate resin: degree of light transmission reached 90%, can reach the brightest light effect can reach homogeneous diffusion effects at the same time, another light management, distribution of space Angle of the output light, light and down light is also much easier to implement. Has good thermal stability, can be used under the high temperature of 1200 degrees continued, has excellent flame resistance, good penetrability, design flexibility, manufacturing companies are free to drop by the injection molding and other processes produce aesthetically pleasing lighting bulb and lamp shade, and the mechanical properties, heat aging resistance properties and optical properties are not affected, ultraviolet resistance stability, can prevent the material performance degradation caused by illumination (any material under the irradiation of uv light for a long time will be damaged, and the ultraviolet light can cause material decomposition yellow). Ruth tyrone resin. LED high pressure compared to the low voltage LED two competitive advantage: under the same output power, high voltage needed for the LED drive current is much lower than low voltage LED, which means that the heat dissipation aluminum housing cost is greatly reduced; High pressure LED to sharply reduce AC - DC conversion efficiency losses, and can reduce the cost of heat dissipation aluminum shell, so the cost of high voltage LED can bring the LED lighting lamps and lanterns and effectively reduce the weight, and more important lowered for the cooling system design requirements, can be thinner and lighter aluminum shell can meet the demand of LED lamps and lanterns, heat dissipation. Equipment manufacturer (OEM) indoor LED highbay light case distribution: office lighting requirements: 1) select the appropriate light source color temperature and color rendering index, and in office generally choose larger than 4000 k color temperature, color rendering index RA is greater than or equal to 75 2) lighting levels, different environment, different places, the lighting requirements are different, the office of intensity of illumination should satisfy the use requirement, generally 500-500 lx. 3) lighting uniformity: reasonable arrangement of lamps and lanterns, the intensity of illumination with, which maximizes the office, the difference between the minimum illuminance to average illuminance is less than a third of the average illuminance. 4) comfort and glare control: in the field of vision than when there is too much high brightness or brightness, will make a person feel dazzling glare, to prevent glare mainly is the effective measures to restrict light source brightness, reasonable decorate light source, such as the light source in the line of sight more than 45 degrees, forming shielding Angle or use the opaque material to keep out light. 5) security: main consideration structure safety of lamps and lanterns, electrical safety, lamps and lanterns is in line with the national standards, whether through the 3 c certification, etc. 6) energy saving and environmental protection: choose high photosynthetic efficiency light source, high efficiency, long service life, reasonable light distribution of lamps and lanterns, high performance, long life accessories and so on, with light general choice bat wing with the light, the light intensity can be evenly and wide distribution. LED office lighting lamps and lanterns in the advantages of: 1) environmental protection lamps and lanterns, protect the earth, the traditional fluorescent lamp contains large amounts of mercury vapor, if broken mercury vapour will volatilize lead in the atmosphere, but the LED fluorescent lamp is not applicable to also do not contain lead, mercury and LED product for environmental protection.2) high efficiency light-emitting, reduce the loss: traditional lamps and lanterns light emitting direction is 360 degrees, while the LED lamps and lanterns is directional, will not result in a loss of light 3) clean and comfortable, no noise, LED lamps and lanterns is does not produce noise, precision electronic instruments produced by choice, for apply for the library, office and so on. 4) the light is downy, eye protection: the traditional fluorescent lamp for alternating current (ac), so will produce 100-120 per second stroboscopic. Is to convert alternating current (ac) directly to dc LED lamps and lanterns, won't produce flashing phenomenon, protect your eyes. 5) no uv, no mosquito, won't produce uv LED lamps and lanterns, so it's not like traditional lamps and lanterns, there are a lot of mosquitoes around the lamp next to the source, the interior will be more clean. 6) adjustable voltage 80 v - 265 - v: traditional fluorescent lamp is lit by release of high voltage rectifier, when the voltage is not lit, and the LED lamps and lanterns is within the range of voltage can be light, also can adjust the brightness. 7) saves the energy, live longer: LED fluorescent lamp power consumption is half of the traditional fluorescent lamp, the life also is 10 times the traditional fluorescent lamp, can use for a long time without replacement, reduce artificial cost, more suitable for difficult to change the place. : 8) solid, use for a long time LED lamp body is used instead of the traditional glass epoxy resin, and stronger, even if it LED to the floor will not be easily damaged. In the field of LED indoor lighting, with a using 40 w fluorescent lamp tube 5000 based lighting factory as an example, according to the average electricity 12 hours every day calculation, tube total power of 200 kilowatts, daily electricity consumption is 2400 degrees, annual power consumption is 864000 degrees, calculated according to 1 RMB/degree, to generate electricity, 864000 yuan a year. If use 5000 16 w LED bulb to replace, according to the average electricity 12 hours every day calculation, tube total power of 80 kilowatts, daily electricity consumption is 960 degrees, annual power consumption is 345600 degrees, calculated according to 1 RMB/degree, to generate electricity, 345600 yuan a year. After replace the light source, save electricity, about 520000 a year. Business class lighting is widely used in hotels, supermarkets, office, shopping mall, metro, hospital, furniture, etc. LED outdoor lighting, LED indoor lighting, LED track traffic lighting, LED lamp lighting, LED landscape lighting, LED display lighting and gas station lamp light special field. LED light source has a small volume, vibration resistance, the dc low voltage, easy to adjust light and remote control, high photosynthetic efficiency, safety, color more, the advantages of long service life and environmental protection. 1) luminous efficiency: single luminous flux of LED co., LTD. Problem is recognized, its one of the solutions is to improve the luminous efficiency. Laboratory developed the LED 230 lm/w, commercialization of production and marketing of LED lights reach 85 lm/w, even higher 140 lm/w. 2) the heat dissipation problem: leds could work more than 70% of the electricity converted into heat, and with the traditional lighting device, white LED light-emitting part almost does not contain the infrared in the spectrum, so the heat can't rely on radiation release. Due to output leds luminous efficacy and life expectancy as nodes and the rise of temperature quickly, such as node temperature 10 degrees, photosynthetic efficiency and lifespan will all drop by more than half. LED heat dissipation firstly embodies in the LED chip work state, thermal effect will reduce the luminous efficiency of the chip, thereby lowering the luminous flux of LED. Thermal effect besides can reduce luminous efficiency of the chip itself, along with temperature rise, will also result in the emission wavelength of chip drift, making it and the excitation wavelength of phosphor is not matching, reduce the efficiency of phosphors maser, further reduce the luminous efficiency of white LED, phosphors will also accelerate ageing, seriously affect the components of the optical performance. Second LED heat dissipation problem largely depends on the device's packaging and packaging materials. To use multiple dense array of white light LED lighting system, due to the influence each other between modules, heat dissipation problems more serious, for his heat management, in addition to reduce thermal resistance tube core chip level, also should use high heat conductivity of packaging materials, design more reasonable heat sink, optimized driving power to reduce the thermal resistance of after encapsulation device, such as improve the device performance. 3) driving circuit, driving circuit main function is to convert ac voltage to constant current power supply. Suitable LED work light source driving circuit should be set, protection, control circuit and auxiliary power supply, sensor, passive components as encapsulating an independent entity relatively complete general-purpose components. 4) non imaging optics design. Due to the LED chip, small size, compact structure, the light emitting area is relatively smaller, he is a 180 - degree lambert body out of the light source, the intensity of light is directly proportional to the cosine of the distribution and the wide Angle, is the LED light source.Is formed on the surface light intensity of illumination increased as the emergent Angle of rapid attenuation. Places according to different applications and requirements, in view of the LED light source characteristics of the secondary optical design, so as to realize the light emitted from LED chip for plastic and change, especially in the presence of intensity distribution, it belongs to the category of non imaging optics design. He is concerned with light control and light distribution of energy utilization. 5) cost: such as flux 1000 lm, for incandescent lamp, cost less than 5 yuan RMB for compact fluorescent lamps, the cost is less than RMB 10, for the LED light source, with ten high power leds cost over 100 yuan RMB. 6) standard level: the LED in the product specification or the measurement on the lack of appropriate standards. 7) LED industry development is facing the challenge: the LED industry chain upstream of mainly includes the epitaxial wafer growth and chip manufacturing industry, the LED devices and LED encapsulation of middle reaches of the industry, LED highbay light application of downstream industries. According to incomplete statistics, China has reached more than 6000, is engaged in the LED business application products and supporting accounted for more than 5000, packaging enterprises accounted for 600, is engaged in the epitaxial wafer and chip manufacturing enterprises with more than 40. Chip of MOCVD equipment (production) the classroom lighting main indicators: desktop, on average, to maintain normal classroom illumination: greater than or equal to 300 lx, intensity of illumination evenness (minimum illumination/average illuminance) is greater than or equal to 0.7, the UGR unified glare values less than or equal to 19, lighting power degree is less than or equal to 9 w/square. Electronic rectifier, high frequency T8 rare earth tricolor phosphor powder, 36 w light source power, color temperature 5000 k, RA91, luminous flux 3200 lm; Energy conservation significantly, lighting energy saving is not equal to reduce the intensity of illumination, and requires the use of energy-saving technology, reduce the energy consumption and energy consumption of lighting technology indicators are: lighting power density (LPD) is the energy dissipation per unit area (W/square); The luminance distribution on the surface of the whole environment in line with the north American society to the classroom illumination brightness requirement.

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LED display technology advantage

(1) The quality imported LED die production of full-color display: viewing angle, low power consumption, color uniform, ultra-thin screen thickness, the screen body weight is light, low failure rate, easy maintenance advantages.

(2) using the PCTV card: The card is a high performance set display, capture, video capture features multimedia graphics card, the card with a Studio editing software. Studio is an award-winning software company of Pinnacle Systems, Compared with the existing ordinary General Multimedia Card

It has the following advantages:

① own PC, making digital movies, capture video, edit, and add the style of title, conversion, and even their own songs as well as digital video production narrative.

② Studio allows the user to select the output video MPEG or AVI file format and stored into the CD tray, or display on a Web site, or create video email. Studio and Pinnacle Systems company capture device, video capture becomes easy never seen before.

③ Studio application software like a VCR from the easy to use good, better, best quality in the form, and calculated that the computer can store video Studio automatically discover and record the scene changes, the editing becomes easy

④ use Studio to create a fast and interactive process. Using the real-time preview window preview of the film can be edited at any time, that is to see that income.

⑤ If you do not like the title or the effect, you can make a change and you can immediately see this change, video editing has never been so fast and interesting. Freely enough personalized, also has the effect of background music, voice-overs and other.

(3) using the latest DVI interface technology: DVI Interface (Digital Visual Interface) is a PC and a digital flat-panel displays (including) the industry-standard interface, as we all know, computer is digital, it handled all digital , but so far the most widely CRT monitor (TV) analog. therefore in the computer-processed data is sent to the monitor display, you must do a number D / A conversion (D / A), this treatment defects that resulted in the loss of information and display new generation of LCD, PDP, HDTV display is digital, the traditional way, the computer graphics card output (analog) would go after the conversion of the analog-to-digital (A / D) can be sent to the display, which in turn caused the loss and trouble using the DVI interface, LED display system developed directly from the PC, DVI interface fetch, no Galaxy card dedicated graphics card, do not need special acquisition card, free from the constraints of a PC, D / A and MD conversion process, to avoid the loss of image detail, in order to ensure a perfect reproduction of the computer image display. simultaneously DVI is the industry standard, so although the bandwidth up to 83MHZ, can also work well now DVI supports VGA (640 × 480) to HDTV (1920 × 1080) and QXGA (2048 × 1536) of all display modes. addition to the DVI interface, the development of the LED display system, to obtain a stable and reliable display data based on, but also of the many important functions integrated
For example: ① no data loss, (2) are not subject to the PC limit, ③ convenient upgrade generally display card memory is 8M, the 128-256M of memory card ④ window position and size adjustments; ⑤ frame rate up to 60HZ; ⑥ non- linear regulator output, more suitable for the human eye; ⑦ 100 Screen brightness control; ⑧ constant current driver; ⑨ cell plate of red, green, and blue color brightness are adjustable to eliminate mosaic.

(4) indoor full color system: the chip to display data to complete the assigned task, its characteristics will receive eight (8 bit) data into 12-bit PWM output pulse that allows the display to achieve 4096 ( 12bit) level grayscale control to ensure the realization of the the nonlinear 256 visual gray achieve full true color visual effects can fundamentally solve the digital display system due to the complex system of data transmission caused by excessive.

Has the following characteristics:
① simplicity of the system the most complex of the data conversion section is realized in the form of a chip-internal logic so that the system becomes very simple.

② directly related to the ease of maintenance and simplicity is the ease of maintenance of the system, eliminating the need for complex control part, system maintenance becomes a work can be completed by the primary technical staff, which not only reduces the overall maintenance costs improve user satisfaction.

The simplicity of the control section (3) High reliability systems further bring the high reliability of the system, which also mainly because integrated chip technology compared to the separation device having multiple stability.

④ high cost system is the most reliable performance to achieve the 4096 gray of the primary colors of the screen control the image display lifelike, naturally, the same display control effect.

(5) unit the structured design consistent with the current direction of development of the industry, large-scale display system in the unit design screen structure, the system intuitive and easy connection, not only to ensure that the size of the display can be adjusted as needed stitching and the installation, commissioning and maintenance of the system becomes extremely simple, and thus minimize the display system is not visible failure rate.

⑥ industrialized reliability design unit design, replacing the traditional design of a large number of discrete devices, greatly improve the reliability and stability of the system.

⑦ comprehensive plan component systems containing the data source, transmission equipment, data processing, data distribution and software management tools, LED display construction becomes simple standardized development and improvement of the technology continue to be in the actual application process, has become a the most mature, stable, easy to implement system solutions.

⑧ equivalent CRT display LED display the most core performance index is gray i.e. luminance level for each primary color (red, green, blue) are achieved, the current the international display standard requires that each primary color to achieve visual 256 grayscale. dedicated the grayscale control chip built-processing logic can output up to 4096 grayscale and selected from 256 grayscale output fitting CRT monitors, so that the overall image more clear, realistic and contagious .

In addition to the gray scale the ⑨ high resolution and high refresh rate, two performance indicators display resolution and refresh frequency due to the characteristics and requirements of the LED display, the traditional solution is often to the loss of which one or two standards as another indicator of the increased consideration. due to each pin of the chip per second data output to reach 1 trillion, far more than the traditional program data output capability, so that the problem fundamentally be resolved this full-color system can simultaneously support a screen resolution of 1024 × 768 and up to 300Hz screen refresh rate, and far exceeds the performance of traditional solutions, so that the display is stable, no flicker, no tailing.

(5) constant current drive: The circuit technology is mature and reliable operation, has been widely used on a full-color display, high performance and low cost, many companies used constant current driver chip, the better way to solve the the LED tube voltage drop across discrete The nature of the defect and good performance, eliminate mosaic.

(6) the optical transmission, optical transmission technology that does not decay:

① fiber transmission bandwidth, large capacity communication. The fiber available bandwidth is about 1.25G frequency bandwidth, improved scanning frequency and refresh rate, the company designed the full-color LED screen refresh rate ≥ 200Hz / s.

② low-loss optical fiber transmission, long distance relay. Maximum repeater distance of up to 15,000 meters, and to improve the reliability and stability.

Immunity to electromagnetic interference (3) optical fiber transmission fiber is an insulator material, which is not natural lightning interference ionosphere changes in sunspot activity interference, not the electrified railway feed wire and high-voltage equipment and industrial electrical interference.

④ fiber diameter is small, light weight, soft fiber core diameter is very thin, about 0.1mm, it is only one percent of the single tube of the coaxial cable; the diameter of the cable is also small, the cross-sectional diameter of 8-core optical fiber cable about 10mm, standard coaxial cable to 47mm. use of this characteristic of the fiber-optic transmission systems share space. wiring quick and easy construction.

In addition to the above outstanding advantages, (5) optical fiber transmission also has the advantage of corrosion-resistant and strong anti-nuclear radiation, energy consumption is small.

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Development Prospect of LED lamps

2008 Beijing Olympics  world to witness the opening ceremony the gorgeous stage lighting the Water Cube beautiful night lighting and outside the arenas one after another huge screen display devices  thanks to LED technology  become Olympica technological feast; same in 2008  LED highbay light and desktop equipment sprung victory CCFL (cold cathode fluorescent tube)   in color, power and environmental protection as one of the future development of the industrytrend. The prospects for the development of the LED lights  can said  now LED has become increasingly bright display popular keywords  superior technical characteristics and the decline in the cost of the popularity of the road it  trade shows, stadiums, outdoor advertising and even the day-to-day application will be led device own stage show. Led the  global leading display equipment suppliers Lighthouse (Lighthouse)  not only bring the latest R44 mm pixel pitch display panel  also invited to the video on the recently concluded China International Sports Facilities and Operations Conference (ISFE) the display areas two the pioneer - PaulKalil and MikioMatsubayashi to participate to the seminar, which  this interview with  two guests to discuss the LED highbay light in China's development path. President and chief executive officer of the United States BSNProductions   BSN in 25 years for the NFL Super Bowl, the MLB All-Star Game, FIFA World Cup, the Olympic Games and other major events to provide first-class products and video technology services  become industry recognized worldwide leader in . Lighthouse (Lighthouse), the United States and Japan regions consultant  large outdoor first person of color display has a wealth of experience in the industry  founder   the Mitsubishi "DiamondVision" system has many success stories in Europe and the United States and Japan.

Perspective  world  stages of development differ materially Mikio market for Japan and Europe and the United States has a very in-depth understanding of to  he said   main stadiums in the United States have been installed LED display system  development focus on the retail shops and outdoor advertisingboard; lot of equipment leasing market in Europe and Japan  LED prosperity   to create value through leasing in the form of activities such as sporting events, concerts or auto. A clear trend ahead  is a growing number of retail stores to start using LED display board  to better attract customers. But the two guests do not think that Western and Japanese market is already saturated   new breakthrough with the popularity of LED highbay light technology will be endless.
Paul and Mikio that the Chinese market has a great opportunity   With valuable experience in hosting large-scale events  especially after the Olympics in demand on the LED display device will show a growth spurt.The Mikio cited the Shanghai World Expo and the just-concluded Shanghai Tennis Masters  Lighthouse, participate as suppliers which the  provide the high-quality products such   With the strengthening of China's international influence many opportunities. Perspective two of  LED Xinjin by the  road twists and turns  bright future there are more and more emerging LED suppliers to enter the market   Mikio that these companies will take a long time and the relative lack of successful operational experience Lighthouse, Mitsubishi and strong competition  difficulty is not small. But he also gives some suggestions  on the one hand have a good creative marketing  market to another stage; on the other hand have a good product  including  display and back-end support to allow customers to recognize your value  and the ability to create his value. And Paul is succinctly given sentence  "The future is bright."

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Green advantages of LED lighting and its application in automobile

The so-called green LED highbay light. Refers to conserve energy, protect the environment and help to improve the people to produce work, learning, efficiency, and quality of life, and promote the health of the body b lighting.

Energy saving: electricity for lighting in China accounted for the total amount of the national power generation 13%, now stands at more than 3,000 kwh per year, 10 energy-saving, annual savings of more than 300 billion kilowatt-hours.

Environmental protection: Electric power plants issued before reaching the user through the long-distance transmission. It must be consumed to get coal, oil, natural gas, hydro. In the power generation process, you will generate a lot of pollutants such as sulfur dioxide, nitrogen oxides and dust. Cause serious acid rain and dust pollution. Save electricity for lighting, green lighting project, and corresponding reduction in pollutant emissions in the power generation process. New efficient light sources, but also to avoid mercury lamp components, to prevent broken glass releases to the environment, but also can achieve the purpose of protecting the environment.

Improve lighting quality: human long-term natural light to live under. Eye good adaptability to the natural light, natural light conditions of the visual sensitivity of human eye is higher than artificial light, 5% -20% or more. The Green Lighting extremely close to natural light. Conducive to building a comfortable, safe light environment to improve the quality of people's work and life.

LED works

led is LightEmittingDiode abbreviation for Chinese translated as "light-emitting diode. The name suggests, this is a semiconductor device capable of emitting light Mou. LEDs are semiconductor optoelectronic devices, in addition to having a light-emitting characteristic, it is fully equipped to the characteristics of the semiconductor rectifier diode. Moreover, in the case of external positive bias can emit light having a certain wavelength. This light emission characteristics occurs in the positive biased portion of the diode characteristic curve.

led the structure mainly consists of the PN junction chip, an electrode, and an optical system. Plus the forward bias on the electrode, the electrons and holes are injected into the P and N regions, when the non-equilibrium minority carrier and majority carrier recombination. Will the excess energy in the form of photons into light energy.

PN junction barrier constituted according to the terminal voltage to set the majority of the P and N regions of the carrier to the other, when the forward bias voltage of the times barrier decreased diffusion. Since the electron mobility is much larger than the hole mobility, a large number of electron diffusion to the P region. Constitute the P region minority carrier injection. These electronic valence band hole recombination. The composite obtained when the energy release in the form of light energy. This is the PN junction light-emitting principle. Since the P region of a large energy gap. The optical radiation can not be sent to the conduction band and therefore does not occur absorption of light, which can be directly transmitted to the led outside, to reduce the loss of light energy.

led advantages in automotive applications

1. Promote safety the First led lights start more quickly than the light source of the White Slave. The driver to see the vehicle in front brakes, have more reaction time. Secondly, the LED highbay light work in a relatively safe low voltage.

Service life more than the life of your car LED lights without replacing drivers Mi do not worry about the failure of the brake lights.

Save space because the LED highbay lamps can be made thinner, can reduce the volume of the lamps.

4. Pollution-free and low-power led lights do not contain mercury, and very low power consumption.

5 Daylight white LED highbay light color closer to daylight. This facilitates the driver's safe driving.

6. Improve visibility led lamp as the light source can make the car shine on the front of the car 30 meters away.

Light control led lights can be controlled through a focusing lens, it fired the desired direction. Such as the road ahead. Avoid oncoming drivers feel dazzling.

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LED Lighting analysis of all the key issues in the design process

To design products, we must first determine who LED packaging structure; Next, consider how to adapt to these packages; by the few opportunities we have chosen, the optical structure is built on top of these packages; many of our creative play . Here are the key issues and analysis of LED highbay light design process.

A problem exists in the semiconductor lighting applications

1, heat

2, the lack of a standard, mixed products

3, there is the price and quality of design issues, and ultimately consumers choose LED lighting, lack of confidence

4, semiconductor lighting in the area of ​​electrical design with the traditional lighting are very different from the traditional lighting companies need experience / skills accumulation process

5, we are optimistic about the market, but not yet on the amount of scale

Features:

1, by adjusting the precision constant current chips, to ensure the LED brightness, color consistency, the module is a standard for downstream customers, customized, reliable high-quality products;

2, old and new lighting design manufacturers, do not be too complex electrical design, simply external with a concise line design traditional constant voltage power supply to work, is the fastest and most reliable way;

3, to solve the LED highbay light market in a large scale on the amount of technology and quality issues.

Second, the thermal design

1, the shortest path heat to decrease the thermal conduction resistance;

2, increasing the mutual transfer area, increase the heat to speed;

3, a reasonable calculation designed cooling area;

4, the effective use of the effect of the heat capacity.

Output drive voltage selector:

Mains driven less than 1,20 W 48V is more appropriate;

2, the larger the power mains driver output voltage of about 36V most appropriate;

3, most of the off-line lighting voltage of 12V and 24V.

Features:

1, based on the series and parallel security considerations load the appropriate driver voltage value, unified voltage values ​​as much as possible to reduce the cost of power supply design specifications;

2, based on safety regulations, product design to meet the certification requirements flow peak more than 60Vdc voltage the more than 42.4Vac or DC;

3 from to solve LED lighting market large-scale on the amount of technology and quality issues to consider.

Back-end drive way for the highest efficiency

When the output voltage of about 48V, low dropout linear constant current the device constant current efficiency of up to 99%, constant-current accuracy within ± 3%, without any peripheral devices affect; when the output voltage of about 36V low dropout linear constant flow the device constant current efficiency up to 98.6%, the constant current accuracy within ± 3%, without any peripheral devices; Even offline lighting part, the low voltage of 12V and 24V, respectively, 96% and 98% efficiency; The power the size efficiency are equal.

Characteristics: the most efficient drive constant current architecture; precision constant current peripheral devices with minimal impact; simple, convenient and practical.

Fourth, the constant current power consumed has reached the extent that can be ignored

In the Shenzhen CYT company laboratory, we have verified the backend constant current efficiency of 99.99375%, to completely ignored the point;

We have one year to complete the design achievements, future IC design team of a dozen people and strong power supply manufacturers, this goal will be completed as soon as possible.

Five, AC-DC design

Switching power development to today is the result of years of accumulated short-term AC-DC Direct constant current unbreakable; constant voltage and constant current relationship between spear and shield, must be considered separately; constant current source load adjustment rate is 1% (mA ) / V, to reach constant current effect; idea more the higher the cost, and the risk is proportional.

Features:

1, to make reasonable use of existing switching power supply resources, it is the most economical;

2, constant voltage and constant current technologies is inevitable;

3, is effective in the stability of the product technically creative.

Six LED combination of package is the future trend

Module combination design can effectively reduce disposable packaging costs; packages scattered beneficial to reduce the cost of thermal design; made of aluminum PCB board; easy optical design; simplify the power supply design; package forms; beneficial to enhance the competitiveness of the domestic LED . !

Package structure 'kidnapping' of our optical effect design

Cree, Nichia, Lumileds, OSRAM representative of several packages. To design products, we must first determine who LED highbay light packaging structure; Next, consider how to adapt to these packages; by the few opportunities we have chosen, the optical structure is built on top of these packages; many of our creative play .

Lighting design is ever-changing, and how we can get out of this situation?

Modular package combined with constant current technology

Design LED package at the PCB level to achieve easy and low cost; put our heads can develop different types of packages; product design power LED based on the integration constant current technology and light distribution parameters; effectively respond to ever-changing, ever-changing LED lamps need; power part, using only the existing traditional switch constant voltage supply; improve product delivery speed, lighting design is simple and practical, cost reduced significantly; containment can also avoid the cutting-edge LED packaging patents.

Nine, according to the nominal value of voltage package

LED constant current drive innovative technologies in Shenzhen CYT was born, I named it as "integrated package" of the power LED constant current technology, referred to as "the module package; This technology is directly integrated low-dropout linear high-precision LED packaging technology based on constant current technology; later LED direct nominal voltage specifications appear, such as: 12V/1W 24V/1W 36V/1W 48V/1W 12V/3W, 24V/2W ...... 36V/10W and so on. Future customers to use the CYT technology products design, no longer need to consider any questions about LED constant current, using the existing standard constant voltage supply can be. This technology will declare LED constant current power supply, "said one end!

10, according to the light source product design

To break the original design products according to the light source, in turn, by product custom LED light source package; maximize with product ideas to show low cost; product design optical package structure;; cooling structure designed in conjunction with the product to reduce the thermal resistance; precision constant current; protection function with one. Shenzhen CYT LED laboratory can quickly help you complete the product design.

XI modular light source advantages ① effectively reduce the cost

To reduce the package number of package cost savings;

2, produced the same environment, conditions improve consistency, improve yield;

3, to reduce the cost of optical design;

4, to reduce the cost of thermal design;

5, batch mixing package to reduce the cost of the sub-file;

6, products designed to simplify and reduce the overall cost;

7, inexpensive package architecture. This technology, guidelines LED lighting industry along a healthy direction.

XII reduce the advantages of modular light source (2) thermal resistance

1, light source and shell heat sink is directly bonded;

2, to avoid the PCB as a heat medium;

3, to reduce the chip to the heat dissipation path;

4 new thermal spread technology; most effective to reduce the thermal resistance of heat to solve the problem of thermal design.

13 (3) constant current precision of the light source advantage of the modular

Module unified consider Vf value;

2, the constant current source from outside influence;

3, linear technology is mature, and does not affect the accuracy of peripheral devices;

4, no EMI interference problems affect the accuracy;

5, multiple parallel each other not independently affect accuracy;

6, from power fluctuations in load constant current accuracy. Highest-precision constant current framework, the LED brightness consistency and life optimization design architecture.

XIV modular light source integrated design advantages ④ protection

A built-in temperature protection;

2, the internal power supply and protection technology;

Built-in high grayscale Interface;

4, short-circuit and open circuit protection;

5, can be set linkage protection function;

6, ESD protection.

Any other built-in functions, protection needs.

Fifth, modular light source advantages ⑤ take the traditional power road

This is a prudent first step; optional; costs is the most favorable; switching power supply are not indicators, LED highbay light power supply is also difficult to achieve, detours; Even strong companies design, LED part time verification; completely electromagnetic compatibility issues. Mature power takes time, some of the publicity about the LED power you're in a hurry you believe it? The first constant voltage, the again linear constant current, LED lighting driver market mainstream must!

More info you can visit: www.lead-lighting.com

Parse the LED industry competition pattern and development trend

Lisida photoelectric latest 3G energy-saving lamps, 3G fluorescent lights, energy efficient than traditional energy-saving lamps increased by 50%, life expectancy up to 18 years, no flicker, no blue light hazard, no UV, is closest to the natural light, led highbay light energy-saving light source.Energy-saving lamps, fluorescent lamps, 3G energy-saving lamps, 3G fluorescent lamp, led energy-saving lamps, 3G Lighting 3G light source, induction lamp, high pressure sodium lamp | Jin Sen photoelectricEnergy-saving lamps, fluorescent lamps, 3G lighting, induction lamp, high pressure sodium lamp, the 3rd generation of energy-saving lamps, the preferred category all new energy-efficient lighting products manufacturer in China, China only has 58 national patents, energy-efficient lighting products enterprise! National Free Phone 4008-828-997Industry competition pattern and development trend1, industry competition patternLED highbay light is a revolution following again after the incandescent, fluorescent light source. Currently, the major countries and regions of the world are vigorously develop the LED industry, the formation of the United States, Japan, the EU leader, Korea, China, Taiwan and mainland China's rapid development of the industrial pattern. Energy saving, long life, widely used as an important field of energy saving and environmental protection industry, LED industry was included in China's strategic emerging industries.The development of China's LED lighting industry is facing significant historical opportunity. The one hand, the process of China's urbanization continues to accelerate, creating a huge market space; On the other hand, the scope of application of LED lighting products continue to increase, the market continues to expand. , LED industry has been the strong support of the government, but can not be avoided is that part of the enterprise is not only the core technology has not yet made a fundamental breakthrough, does not have the professional and technical personnel and research and development team, resulting in the lack of progress in LED luminous efficiency; and product composition can not be further optimized, most of the production chip single species, varieties uneven, uneven level, failed to give full play to the combined effects of; raw materials, auxiliary materials and related production factors can not be fully rational distribution, the lack of of scale brought huge benefits. The past two years, the rapid development of LED lighting technology, rapid decline in the cost of product demonstration and application gradually pushed significantly faster industry consolidation, industrial concentration will gradually increase the retention of some master core technologies will eventually have more independent intellectual property rights and the well-known brand, competitive, reasonable industrial layout leading enterprises.2, industry trendsIn recent years, global energy saving LED lighting industry output growth rate is maintained at more than 20%. According to statistics, in 2010 the global LED lighting market is about 5 billion U.S. dollars, by 2020 the global LED lighting market is expected to reach $ 75 billion, accounting for 50% of the global lighting market share.China is to gradually increase the the financial subsidy LED lighting products promotion efforts, and to promote the demonstration and application of LED products in the medical, agricultural, arena, landscape lighting and other professional and special places in the field of commercial lighting, industrial lighting, and government offices, public lighting, order to promote the implementation of the "Ten City, ten thousand," semiconductor lighting demonstration project, focus on the application of LED tunnel lights, street lamps and other products and system demonstration, active in green lighting demonstration cities create activities. At the same time focusing on the application and popularization of LED downlights, spotlights and other lighting products, it is timely to enter the field of home lighting. Countries give priority to the development of energy-saving environmental protection industry policy support, the LED market demand gradually enhance the future growth trend highlights.According to the decision of the State Council on accelerating the development and the development of strategic emerging industries "," second five "energy conservation comprehensive work program", the "12th Five-saving environmental protection industry development planning and the development of semiconductor lighting energy industryopinions ", the Government enacted the semiconductor lighting energy industry planning.The program states that in 2015, the average annual growth rate of the LED highbay light industry output should reach about 30%, all out 60W more than ordinary incandescent lighting, its market share will drop to 10% or less, energy-saving lamps and other traditional efficient stable at about 70% of the market share of lighting products, LED functional lighting products market share of over 20%, the output value of 450 billion yuan (180 billion yuan LED lighting applications) the LED chip localization rate of 80%.

More info you can visit: www.lead-lighting.com

LED lighting domestic sales See the Lisida photoelectric progressive pioneering 3G lighting market

The main channel of the led highbay light industry:

Engineering channels: high demand, high profit margins, but the high cost of coordination dispersed projects, the capital return long-term, and not conducive to expanded reproduction;

Network channels: low initial investment cost, simple operation, but the competition is fierce, shipping dispersed and uncertain, and thus the after-sales service more difficult to follow up

Traditional sales model distributors, agents, franchisees and other cooperative terminal sales model: distribution channels to quickly layout, and rapid expansion of marketing network and dealer profitability and loyalty can not control

The enterprises themselves to invest in the terminal market area store experience store: Direct channel controllability, good planning, conducive to brand building and after-sales follow-up, but a large initial investment enterprises operating reserve funds and management requirements.

Jin Sen photoelectric latest 3G energy-saving lamps, 3G fluorescent lights, energy efficient than traditional energy-saving lamps increased by 50%, life expectancy up to 18 years, no flicker, no blue light hazard, no UV, is closest to the natural light, energy-saving light source.

Energy-saving led highbay light, fluorescent lamps, 3G energy-saving lamps, 3G fluorescent lamp, led energy-saving lamps, 3G Lighting 3G light source, induction lamp, high pressure sodium lamp | Jin Sen photoelectric

Energy-saving lamps, fluorescent lamps, 3G lighting, induction lamp, high pressure sodium lamp, the 3rd generation of energy-saving lamps, the preferred category all new energy-efficient lighting products manufacturer in China, China only has 58 national patents, energy-efficient lighting products enterprise! National Free Phone 4008-828-997

From the perspective of the development of the industry, each developing new industries will experience: industries have emerged - competitive products - channel competition - brand competition - the industry is poised to process, a new industry will inevitably bring unlimited business opportunities, so more and more people rushed into this industry fall (rise of industry); With more and more people to enter the led highbay light industry, the market is finally to the point where supply is much greater than demand, this time each manufacturer will come out a fist products to seize the market (products competition); carried out with the product competition, channel competition will become more intense, channel competition in fact, in the final analysis is to seize the terminal market, has won a reputation (channel competition); With the channel competition clarified, brand also increasingly become clear (brand competition); the industry brand based industry order an initial (steady industry). In my opinion, the current battle of the LED lighting market still remain competitive in the product. Whether rectangular lamp, wood Linsen ball bulbs, low impact on the market, the impact channels, is nothing more than a product first win customers and win the channels, this typical product competition.

More info you can visit: www.lead-lighting.com

Which is better between Led energy - saving lamps and general energy - saving lamp?

Ordinary energy-saving lamps contain mercury bulbs if damage will affect people's security, the average life expectancy of one year, annual encounter bad need to replace, and the shape is not very beautiful, luminous colors white and warm. LED energy-saving lamps, however, all solid-state emitters, solid cold light source, epoxy encapsulated, the service life of up to five years, is 10 times more energy-saving fluorescent lamps. Installation time can guarantee that within five years without replacement. Shape it, highlight the noble gorgeous and generous. LED highbay light energy-saving lamps and rich colors, such as: white, yellow, blue, and so on. Energy-saving and environmentally friendly LED lights, shockproof, waterproof, miniature, high brightness, easy to adjust light, etc. .. With the worldwide phase-out of incandescent progressive implementation of the plan, the green lighting industry will rise. LED highbay light generation of green light, will surely bring about a revolution in the 21st century global illumination field. We just need to wait and see.

More info you can visit: www.lead-lighting.com

Patent Analysis: A LED energy-saving fluorescent tubes power shield

Trial of the program of the new utility patents by many manufacturers to prove that it can be very effective for the utility model patents, technical solutions to serve to extend the useful life of the drive power LED highbay light energy-saving fluorescent tubes to prevent early failure. Also makes the drive power LED energy-saving fluorescent tubes during the whole lamp (LED energy-saving fluorescent tube) assembly process becomes more simple and convenient, but also on the part of the drive power LED energy-saving fluorescent tubes become an integral part of the Led highbay light played the intensive to simplify, beautiful, convenient transport role. Improve the defects caused by the use of heat shrink tubing LED energy-saving fluorescent tube drive power to squeeze off the PCB; improve the poor power supply part of the heat caused by the use of barley paper defects; improve the complexity caused by the use of other non-professional accessories process, thereby saving the cost of the process.
    The utility model patents now only been by the employer Lin Technology Co., Ltd. of Shenzhen exclusive for products (power hood) only the current preferred embodiment, welcome new and old customers purchasing used. Instructions under the authorization of the utility model patents, all based on the new technology in real terms by the embodiment of the utility model patents minor modifications, equivalent replacement and improvement, and shall include the scope of protection of intellectual property rights in the new technical solutions within. Caused by violations of intellectual property rights to the patent, the patentee shall be held liable for offenses against the State Intellectual Property laws!

More info you can visit: www.lead-lighting.com

Led:2012 years to see progress in the LED Highbay Light

The MOCVD equipment supply determines the supply of industry as a whole. Aixtron and Veeco's MOCVD equipment accounted for 90% of the global MOCVD total, which also determines the LED highbay light industry will not repeat the photovoltaic industry is serious excess capacity of the old road. 2011 new MOCVD equipment 57% in China, the domestic LED investment obviously overheating. However, with the local government phasing out of subsidies for MOCVD equipment (each 800-1200 yuan subsidies), the domestic MOCVD investment boom is gone. Chip companies have signed an agreement subsidized, the amount of subsidies the largest enterprise to the most competitive advantage, because the largest and production equipment is almost free of charge. This first-mover advantage latecomer competition disadvantage new entrants into the future of the industry will be less and less. Potential demand for LED lighting applications, LED backlighting applications several times. LED highbay light already have commercial application feasibility, with the States in 2012 and 2013 to phase out incandescent lighting market ushered in the start of the critical point in time. Alternative from the product perspective, incandescent disable most directly start energy saving lamp products, but in the area of high-end demand, also part of the LED bulb will directly translate into demand, because the LED energy-saving, no flicker and no mercury and other advantages. LED highbay light Engineering, starting in mid-2012, the demand for high power LED bulb will be a rapid rise, in response to the market demand of the end of the incandescent disabled. Recommended Ruifeng power LED packaging technology leading the rhythm from the investment point of view, the short-term, Hongli Opto-electronic and lighting companies sunlight lighting; long term, LED strong manufacturing properties, such as the company with the scale and brand advantages Sanan Optoelectronics, dry according to optical profitability will highlight

More info you can visit: www.lead-lighting.com

LED industry talent shortage is a big problem

First, LED highbay light industry in recent years the rapid development of enterprises too late to train new talent. With policy support and government subsidies has intensified the LED industry was the explosive growth of people, but can be regarded as a "talent" but very few. New businesses time to nurture talent, to rely on high salaries from other companies "poaching." Ultimately, talent or original talent, just replace the enterprise and location.

Second, the lack of basic education for the LED. Incompatible with the rapid development of the LED industry, the domestic institutions corresponding counterparts in professional settings just started, LED talent yet not by institutions batch culture. Industry talent education is not based on the late talent building has not been perfected. This results in the training of personnel are crippled to the abnormal development of late. The talent shortage problems such as can not be cracked, LED highbay light industry development will undoubtedly be restricted.

Also, traditional enterprise is blindly transformation, the lack of LED personnel training system. LED lighting industry is a rapidly growing industry, and good market prospects, many companies are in transition or get involved in the LED industry, but these companies understand either the LED, LED customers do not know where, so they had to use the easiest way to looking for customer resources, see where the profits are to get involved in where. Such enterprises often do not pay attention to the training of personnel, was not going to achieve any breakthrough at the technical level, these practices are difficult to fundamentally promote the development of the industry.

Lack of LED industry, high-end talent. The overall development of the domestic LED lighting industry is lagging behind the performance of one is the lack of high-end talent. Today LED patent war has been sounding the lack of core technology has become the bottleneck in the development of enterprises.

Meanwhile, high light efficiency, high reliability LED raw materials almost entirely dependent on imports, the core technology of high-grade epitaxial silicon production process controlled by others, especially the upstream chip patented technology by large foreign firms to master. With the the LED patent wars waged, the domestic enterprises to become more aware of the importance of talent. LED companies in order to health and long-term development, we must crack this problem of talent shortage.

From your peers, "dig", which is the most direct and effective way to get talent. However, this practice is detrimental to the long-term development of the industry as a whole, not fundamentally solve the problem. LED industry has not the strength of the talent, and all enterprises poaching each other to form a vicious cycle, there are corporate Although temporarily talent, but nothing good breakthrough technology.

2013, due to the localization of the LED upstream of many (including MOCVD, sapphire machinery etc) will accelerate the process of the entire LED industry will be more scarce talent, the domestic LED highbay light industry will continue to face the throes of a lack of talent, should the recent combined-and long-term goals, a combination of the introduction of independent culture, in the near future to ease the company's talent hungry.

More info you can visit: www.lead-lighting.com

Common causes of LED lights flashing and approaches

Usually the human eye can perceive frequencies up to 70 Hz light flashes above this frequency is not perception. Therefore, in the LED lighting applications, if the pulse signal frequency is lower than the low frequency component of 70 Hz, the human eye will feel flicker. Of course, in the specific application, there are a variety of factors that could cause the LED blinks. For example, in the off-line low-power LED highbay light applications, a common power supply topology isolated flyback topology. ON Semiconductor 8 W the Offline-type LED solid-state lighting meet the "Energy Star" standard drive GreenPoint? Reference design, for example, due to the the flyback regulator sinusoidal square wave power conversion did not provide constant energy to the primary bias, dynamic Self-powered (DSS) circuit may activate and cause light flashes. In order to avoid this problem, it is necessary to make the primary bias able to discharge part in each half cycle, and accordingly, need to be appropriately selected form the magnitude of this capacitance and the resistance of the bias circuit. More LED lights product information please click: http://www.dzsc.com/product/info/3306.html

In addition, even if the LED drive applications in use provide an excellent power factor correction, to support the TRIAC dimmer, also requires the electromagnetic interference (EMI) filter. Transient currents caused by the TRIAC step (step) will stimulate the natural resonance of the inductance and capacitance in the EMI filter. If this resonance characteristics cause the input current is reduced under the TRIAC holding current, TRIAC will turn off. After a short delay, TRIAC usually will turned on to inspire the same resonance. Within a half cycle of the input power waveform, in this series of events may be repeated several times, so as to form a visible LED highbay light To cope with this problem, a key requirement for a very low input capacitance EMI filter TRIAC dimming, this capacitor decoupling by TRIAC and winding impedance. The capacitance decreases according to the formula, the dimming module, it is possible to increase the resistance of the resonant circuit, in principle, to suppress the oscillation, the restoration of the desired operation of the circuit.

PWM dimming LED life impact of

The LED itself long life the PWM dimming does not prejudice the life expectancy of the LED; even help reduce the LED heat PWM dimming, in fact, can also help prolong the LED life expectancy. Of course, the system design, the need for effective detection and control LED temperature to ensure LED work reliably, reflecting the advantages of long life and low maintenance costs.

TRIAC dimming of the LED brightness potential problems

TRIAC dimming is a popular the dimming market welcomed. TRIAC dimmer originally designed for incandescent TRIAC dimming LED driver but also launched this leading suppliers such as Semiconductor, TRIAC dimming ideal for LED lighting. But this approach also has its limitations where, such as increased circuit complexity, affect the power factor, the dimming level is relatively limited and other issues. The ON Semiconductor As the premier high-performance, energy efficient silicon solutions provider for green electronics, the latest LED driver for residential and commercial LED lighting applications the NCL30000 this device using a critical conduction mode (CrM) flyback architecture The single-stage topology power factor higher than 0.95, it is also avoided, DC - DC (DC-DC) switching segments, simplifying the circuit. This device, even in low also provide high energy efficiency, and compliance with various regulatory requirements and overall system luminous efficiency requirements. In addition, this device is compatible to leading edge TRIAC dimmer and the trailing edge transistor dimmer and dimmer depending adjustable LED light output to less than 2%, and provide excellent dimming performance.

Here are just look at the the Semiconductor Thermal push LED driver program

ON Semiconductor has introduced several important energy-efficient GreenPoint? LED driver reference design are:

1,3 W to 5 W LED driver reference design. This reference design uses the size and features for MR16 LED replacement configuration, has been carefully constructed and tested, and used to drive high-brightness LED reference design based on the buck - boost topology, non-isolated constant Semiconductor flow configuration, the work of about 150 kilohertz (kHz) frequency NCP3065 switching regulator. This reference design circuit for track lighting, automotive lighting and landscape lighting, 12 Vac or 12 Vdc applications, regardless of changes in input line and output LED voltage, flat current steady flow. This reference design also provides a unique auto-detection circuit, supports 12 Vdc or 12 Vac power input, while maintaining the target output current.

2, isolated 8 W constant current LED driver GreenPoint? Reference design. This reference design expectations in line with the U.S. "Energy Star" (an ENERGY STAR?) Residential lighting applications, the 1.1 version of the solid-state lighting (SSL) requirements designers, and the same has been carefully constructed and tested, and used to drive a portable table lamp, cabinet 1-8 power LED. applications within the lighting and outdoor porch light reference design uses a novel circuit configuration, no need to increase the the additional passive power factor correction (PFC) network, can provide high 115 Vac power factor of 0.85 to reduce the number of components, and easily meet the power factor requirements of residential LED applications. This design support from 90 Vac to 265 Vac universal input voltage the Semiconductor integrated fixed frequency current mode controller and a 700 V MOSFET NCP1014 switching regulator integrated circuit (IC).

3, the reference design for offline high power factor TRIAC Dimmable LED Driver GreenPoint? This reference design uses NCL30000 key device, intended for use in the United States, "Energy Star" commercial and residential lighting applications. NCL30000 working temperature range of -40 ° C to +125 ° C, to ensure the scope of work for most of the solid-state lighting (SSL) applications under the different environments. Low start-up current NCL30000 has a typical value of 24 microamps (μA) and the typical value of a low operating current of 2 mA, with the energy-efficient design. NCL30000 Other key features include programmable on-time limiter, zero current detection (ZCD) sensing module, gate driver, and application CrM switching power supply required for other PWM circuit and protection functions.

ON Semiconductor LED driver design advantages

ON Semiconductor provides many different LED driver solutions for a broad range of applications: automotive, mobile / portable (mobile phone and digital camera's LCD backlight and camera flash), large-size LCD screen (laptop, netbook, LCD TV) LCD backlighting, signs, buildings, as well as general lighting.

ON Semiconductor provides products cover three kinds of LED drive method: linear program (extremely simple and minimal external components), DC - direct current (DC-DC) inductive switching converter (used to provide energy-efficient and larger current) , as well as the charge pump switching converter (used to provide energy-efficient and compact size).

ON Semiconductor also offers different LED highbay light output modulation / dimming method: triac switching elements (TRIAC) dimmer, pulse-width modulation (PWM) dimming, analog dimming, digital dimming (DALI, the I2C etc.).

Semiconductor LED driver products can be different types of voltage source: AC high voltage from 120 Vac to 480 Vac (voltage specification of certain highways in the United States), the medium AC or DC voltage (such as cars 12 Vac or 12 the Vdc voltage), 0.9 to 5 V portable battery.

Overall, no matter what kind of LED lighting applications, regardless of what is required driver program, no matter what kind of dimming method, no matter what kind of common supply voltage, ON Semiconductor LED driver solution that can provide suitable to meet the different needs of customers.

More info you can visit: www.lead-lighting.com

LED Lighting : Led street lamp analysis of lightning protection design strategy

Lightning mainly the following four types:
1. Direct lightning stroke
Lightning directly stroke contains a great deal of energy, peak voltage up to 5000kv lightning into the ground with great destructive power. Will result in the following three effects:
(1) shed huge rich current at the time of a few microseconds, quickly pick up the high ground potential, resulting in the counterattack the accident, endangering the safety of persons and equipment.
(2) the lightning current strong electromagnetic waves, high pulse voltage sensing in power lines and signal lines.
(3) high heat lightning current flows through the electrical equipment, resulting in a fire or explosion.
2. Conduction Ray
The distant lightning struck high voltage lines or due to electromagnetic induction, transmitted by the outdoor power lines and communication lines to the indoor electrical equipment in the building.
3. -Lightning
Frequent discharge between clouds produce powerful electromagnetic waves cause the common mode and differential mode interference affecting the operation of the electrical equipment.
4. Switching overvoltage
Inductive and capacitive loads in the power supply system is open or disconnected, the ends of the earth short circuit short circuit power lines, power lines can have a high-voltage pulse, the pulse voltage of up to 3-5 times the normal voltage, and can severely damage equipment. The destructive effect similar to lightning.
So how will we prevent the occurrence of lightning? Huaxing power after CLP Research Laboratory study found that, in several ways is the most effective way to prevent street lamps lightning damage:
1, the external lightning protection combined with internal lightning
General are LED street lamp external conductor material, itself the equivalent of a lightning rod, deflectors and ground network must be installed in the design of these systems constitute the external lightning protection system. The system can avoid LED highbay light street lights due to lightning directly stroke caused by fire and safety incidents. Internal lightning protection system is a street light internal ground, set voltage protection and other protection equipment. This system prevents over voltage of lightning and other forms of intrusion, causing the power to destroy the external lightning protection system can not be guaranteed. Between these two complement each other, complement each other. Internal lightning protection systems in many devices such as the shell, and out of the protected area of ​​the cable, metal pipes should be connected to the external lightning protection system or set the overvoltage protector and equipotential connection.
2. Lightning equipotential connection
Potential connection for the complete elimination of the use overvoltage protector of the destructive potential difference caused by lightning, power lines, signal lines, metal pipes are performed each inner layer at the interface of the protected areas must also be connected to the local equipotential various the local equipotential connections to be connected to each other, and finally connected to the main equipotential.
3. Set the lightning protection zone
LED street lights in addition to the power supply, but also set some communications equipment used to control the lights off and the brightness of these devices and power needs to be placed in the lightning protection zone to protect the area directly affected by the housing shield. Here, the electromagnetic field is much weaker.
4. High-quality protective equipment - the lightning module and overvoltage protection module
The role of the SPD in the shortest possible time (nanosecond) protection system connected to the equipotential system, so that each port of the device equipotential. While the huge pulse energy will be generated in the circuit due to lightning is released by the short-circuit line to the earth, reducing the potential difference of the equipment interface end, and thus play the role of the protective equipment.
 LED highbay light  power supply module must not only be designed in accordance with the above requirements, and must undergo a rigorous inspection procedures:
1, with the constant-voltage output function or having a constant current output function, or both functions of both control means, should be used GB19510.12/IEC61347-2-13 safety standards test.
2, having only control LED dark and bright, flashing, color change function logic control means should be used GB19510.12/IEC61347-2-11 safety standards test.
3, if a control means of both the above-mentioned functions of both shall GB19510.12/IEC61347-2-13 safety standards test.
Practice has proved that the scientific design and rigorous testing, not only to ensure that the LED streetlight system damage by lightning, and put an end to the Lightning on the power supply common mode and differential mode interference.

More info you can visit ：www.lead-lighting.com

History of LED highbay light

1907 Henry Joseph, a first LED highbay light in a silicon carbide mechanical and electrical the phenomenon. Due to the the yellow of the issued Kwangtai black, is not suitable for practical applications; suited to silicon carbide and electromechanical more difficult, research was abandoned. Gudden late twenty's grace in Germany and Robert Wichard zinc sulfide, copper, phosphorus chemiluminescence. Because of luminous and dark and stop.
In 1936, George · Destiau, zinc sulfide powder released report of the emitted light. With the application status and widely recognized, the last of the term "El Niño".
20 Century50, British scientists in electric luminescence experiments with the invention of the first modern sense of leadership to the semiconductor material, and can be used in the sixties. It is said that in the early trials, resulting in the need to be placed in liquid nitrogen, and the need for further action and breakthrough efficiency work at room temperature. The first generation of business leaders can only be issued by the invisible infrared, but quickly applied to the areas of sensing and optoelectronics.
In the late 1960s, the GaAs substrate phosphide invented the first visible red LED. The gallium phosphide changes make the leadership more efficient, released a red light, even produce orange light.
In the mid-1970s, gallium phosphide as the light source, and a pale green. The LED using double GaAs wafer (a red one just green) can be issued yellow. At this time, the Russian scientists used silicon carbide production of yellow light. Though not as European LED efficient. But in the late 1970s, it glows green. Aluminum phosphide in the early 1980s, the mid-first-generation high-brightness LED-born, the first set of red, then yellow, and finally green.
Until ninties early as phosphide aluminum gallium indium production of orange, yellow and green. The first time in the history of blue LED also appeared in the early 1990s, and then the semiconductor light source Emery - early obstacles. Measured in accordance with the technical standards to Russia earlier yellow light LED light source.
In the mid-1990s, there gallium nitride ultra brightness LED, green and blue and then the production of agricultural products of high strength indium gallium LED n. The core of the high luminance blue white LED chip, the light emitting chip coated with a fluorescent P, then P in the blue light enters the light absorption fluorescence chip. Using this technique is to create any visible color of light.   LED highbay light arket will see the production of novel colors such as pale green and pink combination into. May learn the scientific readers LED development has experienced a long and tortuous history of the process. In fact, the recent development of not only sent a pure UV and truly "black" issue ultraviolet. Low-energy far away, so the history of the development of the LED can be nothing. Perhaps one day be able to develop energy X-ray LED. However, the development of LED is not just its color and brightness, like computers, to comply with the development of Moore's Law. Doubling every 18 months brightness. The early LED can only be used for the lights, the early computer displays and digital watches. Now began to appear in the super-bright areas. Will be continued in the next period of time. For example, United States 2005 e All traffic lights will be led; Decade for the automotive industry in the United States will stop using incandescent bulbs, LED highbay light, including car headlights. Most large outdoor screen thousands of LEDs to produce high-quality video effects. Soon, LED will light up our home, office or even street. Using energy-efficient LED solar rechargeable battery through the red light from the sun and its electrical. In order to be able to power off the light source and the Third World and elsewhere. The dim light-emitting diode to lead a new era of truly herald.
Dongguan City Yeston photoelectric Lighting Technology Co., Ltd. specializes professional production of LED mining lamp series products.
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