Sun Qingcheng team develops high-efficiency LED street lamps

Recently, Professor Sun Qingcheng of Taiwan’s Central University has successfully developed a high-efficiency LED streetlight that focuses light sources on the road to avoid hitting the night sky and home. This leading global technology is superior to traditional street lamps and general LED street lamps, and the optical utilization rate can reach up to 81%.

Sun Qingcheng stated that the optical utilization rate of traditional street lamps is only about 20%, and that about 45% of LED street lamps in general represent most of the light being “wasted” away, failing to be directed to the road surface being illuminated, and the light is shining into the sky everywhere. , Home, the formation of light damage, common sight is the sky and lighting is very bright, but the road is not very bright.

Sun Qingcheng, Professor of the Department of Optoelectronics and Engineering at the Central University, and Yongfeng Shengsheng Science and Technology Co., Ltd. jointly developed the “Microstructure Diffuser”, an array of trenches formed in the film to allow light to pass through these trenches. Refraction, through different forms of groove design, can regulate different light shapes and uniformity. In this way, the street lamp emits a rectangular light shape, which is more in line with the road surface design than the round light shape produced by the general LED street lamp, so that the entire road looks low in brightness, but the road surface is bright and the light is evenly distributed.

Sun Qingcheng said that after the R&D team applied the key technology “microstructure diffuser” to high-efficiency LED streetlights, it could effectively control the irradiation range and reduce light pollution. The optical efficiency of the lamps was increased to between 51% and 81%. Another advantage is that it is more energy-efficient than ordinary LED street lamps.

Sun Qingcheng said that the design of this high-efficiency LED street light can also be applied to other lamps such as bicycle lights. At present, the technology has been transferred to manufacturers, and the transfer of technology has reached NT$25 million, which is expected to be commercialized after six months to one year.