The new drive the innovation of multilevel PWM technology for the LED power supply, and compared the current LED products using PWM and linear drive, this technique significantly improves the light quality and energy efficiency. This way is not limited to the LED driver, and can provide more benefits than PWM or constant current mode and choice.
The traditional way of PWM, LED is pulsed current, rather than dc. This kind of drive current to the human eye is unable to detect the speed of the fast switch. Based on pulse current LED power supply to make the output light is easier to control.
Dr By Lai Yuk Ming, Dr Loo Ka Hong and professor MichaelTse was established by the research team, they has carried on the transformation to PWM mode. Pulsed operation is to maximize the light output while minimizing thermal energy consumption way to redesign. To get a higher luminous efficacy (lm/W). Dr Loo Ka Hong said their technology could be 15% energy saving.
In large-scale applications, the energy saving effect is more significant. One of New York Times Square tower of the billboard is a good case. Giant screens used in building the 12 million lamp, power of 250 kw. If the billboard working 16 hours a day, every month electricity bill for $18000. Energy saving 12% means can save $2160.
Compared with traditional way, it is low cooling requirements, required less heat sink. This means that the LED systems can do more. Owing to excellent ability in dimmer, the new PWM drive allowing producers to produce all that move light LED, dimming performance to be as low as 0 watts. These superior quality can be made brighter more intelligent and more durable LED lighting solution.
Worldwatch Institute said, from the perspective of environmental protection, the world is turned to the LED. If all the traditional lamps and lanterns are replaced with energy saving products, lighting energy will be reduced by 40%.
As the most green light source to replace incandescent lamp, LED lighting is popular choice, but it is not perfect. Consumers need more bright natural light, as incandescent bulbs. In high power applications such as automobile headlamps and building lighting, brightness demand even more outstanding. The global LED street lighting industry is in the effort. Multilevel PWM mode is a kind of technology in the industry
Obviously, the new technology can make better products. High luminous performance and good heat protection allowing producers to make a more compact exterior lighting solutions, and a very high lumen output. And, can reduce costs, because all these quality can be achieved by the low cost of IC. It is a big wedding for LED manufacturers.
The technology has already caused strong focus in the industry, won the 41st Swiss Geneva international invention exhibition gold award.
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