Differences between Chinese and foreign LED lighting packaging technology

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With the Chinese packaging company led the rapid development in recent years, LED packaging technology has risen to a better level, especially in some high-end needs, such as large LED display, wide color gamut buy led high bay lamps, China 's LED packaging companies outstanding has been able to meet their needs, advanced packaging technology produced by the LED close to the international level of similar products. LED packaging companies active in China to catch up with foreign technology gap is narrowing.
One: difference in packaging production and testing equipment
Rigid LED packaging production equipment including the major solid crystal, wire bonders, sealed plastic machine, color separation machine, dispenser, smart oven. Five years ago, led power automatic packaging equipment is basically dominated by foreign brands, mainly from Europe and Taiwan, China has only a small amount of semi-solid crystal, wire supply equipment. In the past five years, China 's equipment manufacturing industry led drive power production has made great progress, and now automatic solid crystal, automatic sealing plastic machine, color separation machine , automatic dispenser, smart oven, etc. are manufacturers supply, with a good price.
China's LED packaging companies in the spotlight, at the forefront of scale LEDT5 lamp packaging companies are the world's most advanced packaging equipment, which is the advantage of the decision. On the hardware level, China 's above-scale enterprises led energy saving lamp packaging is the world's most advanced. Of course, some of the higher levels of test and analysis equipment to be further equipped.
Therefore, China's packaging equipment hardware has a world-leading level, with basic and advanced packaging technology development.
Two: LED chips differences
Currently Chinese mainland enterprises led fluorescent tube, about ten or so, a late start, the scale is not big enough, the biggest light diffusion plate Enterprises annual output of about 3 billion yuan, an average annual output value of every home in 1-2 million.
This year the Chinese mainland enterprises led controller fast development, technology level soon, small and medium size chip (refer 15mil or less) has been able to basically meet the domestic demand for packaging companies, large-size chip (refer to on-chip power -type W) need to be imported, mainly from the United States and Taiwan enterprises, but only after a large-size chip LED general lighting to high-volume applications.
PS diffuser plate package device performance depends plate lights, flat grille core indicators include brightness, wavelength, failure rate, antistatic capabilities, attenuation at 50% degree. Currently panel lights package small and medium size enterprises in the majority choice of homemade chips brand, chip performance of these domestic brands and foreign brands gap smaller, backlight has a good price, and meet the needs of the vast majority of LED bulb enterprise applications.
Three: Auxiliary packaging material differences
Auxiliary packaging materials including stents, gold wire, epoxy, silicone, molding strips. Auxiliary materials is an important foundation LEDT8 lamp integrated device performance, the quality of support materials can determine the failure rate of panel light guide plate of the device, the decay rate , optical properties, and energy consumption.
Currently supporting material packaging supply chain in mainland China has been better, most of the material is capable of producing supply in the mainland. However, high-performance epoxy and silicone are mainly imported, these two materials are mainly required high temperature resistance, UV, refractive index is excellent and good expansion coefficient.
With the process of globalization, Chinese panel light diffuser plate packaging companies have been able to apply to the latest and best packaging auxiliary material in the world.
Four: package design differences
The main package slim light box with a bracket-style LED, SMD type LED and power LED three main categories.
led light guide package design, including shape design, thermal design, optical design, materials matching design, parameter design.
Acrylic light guide plate design has been relatively mature, mainly in the decay lifetime, optical matching, and other aspects of the failure rate can be further on the steps.
SMD lamps light guide is designed especially top emission type TOP SMD in constantly evolving package stent size, package design, material selection, optical design, thermal design, innovation, buy led high bay lamps has broad potential.
Lighting diffuser plate design is a new world. Due to the large size power type of chip manufacturing is still in the evolving, making the structure of power LED, optics, materials, parametric design is evolving, there have been new designs appear.
China 's LED packaging design is based in a foreign country and Taiwan have been designed on the basis of improvement and innovation. Designed to rely on good computer design tools, good testing equipment and good reliability test equipment, more need based on advanced design ideas and product savvy. Currently, China's LED packaging design level but also with foreign giants have a certain gap.
Five: packaging technology differences
led packaging technology is also a very important part. For example glue solid crystal machine control, temperature and pressure wire bonders, the oven temperature, time and temperature curves, sealed plastic bubbles and card position control, etc., are the focus of process control points. Even good chip quality, DPM match is good, excellent design, high precision equipment, if it is incorrect or process control is lax, it will ultimately affect the reliability of the LED, attenuation, optical characteristics.
With China LED packaging companies in recent years of rapid development, LED packaging technology has risen to a better level, especially in some high-end needs, such as large LED display, wide color gamut LCD backlight, China 's LED packaging companies outstanding has been able to meet their needs, advanced packaging technology produced by the LED close to the international level of similar products.
Six: LED device performance differences
Performance LED devices mainly in the following six areas:
① brightness or lumens; ② bad light; ③ failure rate; ④ light efficiency; ⑤ consistency; ⑥ Optical Distribution Characteristics
1, brightness, or lumens
2, the light fades
General studies suggest that light fades little correlation with the chip, the largest packaging materials and processes associated with the degree. The impact of bad light packaging materials are solid crystal primer, fluorescent plastic, plastic closures and other outside influence bad light packaging technology mainly baking temperature and time and materials to match each process and so on.
At present, China LED packaging technology after years of development and accumulation, has a good foundation in the bad light control with some foreign products have been unbeatable.
3, the failure rate
Failure rate and chip quality, packaging auxiliary materials, production processes, design and management level related.
LED lights fail mainly for the dead, the light fades too large, the wavelength or color drift too big. Depending on the intended use of the LED device, the failure rate have different requirements. For example, uses LED lights can 1000PPM (3000 hours ); lighting uses LED as 500PPM (3000 hours); color display uses LED as 50PPM (3000 hours).
The failure rate of the overall level of China's LED packaging companies to be improved. The good news is that a small amount of China's outstanding packaging companies fail has reached the world level.
4, light efficiency
LED luminous efficiency of 90% depending on the luminous efficiency of the chip. China LED packaging companies to improve light efficiency aspects of packaging technology also has a lot of research.
If China has made a breakthrough and production on a large tile-on-chip research and development production, will greatly contribute to improving the power efficiency of light-based package devices.
5, consistency
Consistency Consistency include LED wavelength, brightness uniformity, color temperature consistency, consistency decay.
Consistency is the former three feed through process control and screening by separation achieved. The first three levels, the Chinese LED packaging technology in line with the foreign countries.
Consistency is often difficult angle sorting out the need by optimizing the design, material mechanical precision control, strict control of the production process to achieve. For example, LED full color display uses red, green, and blue oval LED angle consistency control is very important , critically affect the color quality full color LED display, becoming a high-technology LED devices.
Attenuation consistency, and material control and process control related, including different color LED attenuation uniformity and consistency of the same color LED decay.
Consistency is an important research topic buy led high bay lamps packaging technology.
Part of the LED packaging companies in China LED technology has been consistency with international standards.
6, the optical distribution characteristics
The LED is a light emitting device. For many uses for LED applications, LED light shaped distribution is an important indicator to determine the basis of secondary optics design applications, but also directly affect the visual LED application products.
For example, LED oval lens design using LED outdoor display enables the display brightness changes when the angle changes smoothly and have a greater perspective, in line with the human visual habits. Again, led street light optical requirements, making a second optical design and optical design LED lights must match, the road to achieve the best spots and best luminous efficiency.
For design and development of computer simulation software is commonly used optical means. LED packaging companies active in China to catch up with foreign technology gap is narrowing.

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