Hong Kong Polytech University to develop PWM technology to improve the efficiency of LED system

Department of electronics and information engineering, Hong Kong Polytech University researchers recently developed a high-performance LED driver, can make the LED light brighter and more energy-efficient.

The new driver uses innovative multi stage PWM technology to supply power to the LED lamp, which significantly improves the light quality and energy efficiency compared with the PWM and linear drives used in the current LED products. This approach is not limited to LED drives and can offer more benefits and options than PWM or constant current mode.

In the traditional PWM mode, the LED accepts a current pulse, not a dc. This drive current can be detected at a fast speed. The pulse current is LED, which makes the light output easier to control.

By Lai Yuk Ming, Dr. Loo Ka Hong and Professor MichaelTse established by the research team, they have changed the way PWM. The pulse operation is the redesign of the way to maximize the light output while minimizing the energy consumption. In order to get higher efficiency (lm/W). Loo Ka Dr. Hong believes that their technology can save energy 15%.

Compared with the traditional method, it has low heat dissipation and smaller heat sink. This means that the LED system can do much smaller. Due to the excellent dimming capability, this new PWM driver allows manufacturers to create a fully dimming LED, so as to achieve the dimming performance as low as 0 watts. These excellent quality can create a brighter, more intelligent and more durable LED lighting solutions.