Enhancement of the optical performances for the LED backlight systems with a novel lens-cap

Jee Gong Chang, Charles Lun De Liao, Chi-Chuan Hwang

研究成果: Conference contribution

9 引文 斯高帕斯(Scopus)


A novel dual-cone-shaped side-emitting lens cap for High Brightness Light Emitting Diodes (HB-LEDs) is proposed for improving brightness and high uniformity of the direct LED acklight Units (BLUs) for large area LCD-TVs. Combining the designed lens cap with red, green and blue (RGB) chips on a Metal Core Printed Circuit Board (MCPCB), the LED module with the proposed cap is able to provide a compact white light source with unique features such as instant color variability and lower power usage, etc. The dual-cone-shaped of the proposed lens cap is designed to emitting most of the light rays to the sides, only a small portion of light upward along the optical axis of the lens, providing a uniform luminance distribution and the high brightness on the backlight. In addition, a small, half-circle effective surface is designed and upon the proposed LED module about 10mm, the surfaces of which are attached with reflective films to increase the level of light mixing in the larger, global reflector optical box. With the structure of the LED module well designed, the LED backlight Module would design for the large area LCD-TV using the fewer number of LEDs and also have low power consumption. The results indeed identify the attributes of the BLU, which make it possible to achieve excellent backlight performance using a direct illumination approach from the light source of "Dual-Cone-Shaped Side-Emitting Lens Cap of LEDs".

主出版物標題Novel Optical Systems Design and Optimization IX
出版狀態Published - 2006 十一月 6
事件Novel Optical Systems Design and Optimization IX - San Diego, CA, United States
持續時間: 2006 八月 152006 八月 16


名字Proceedings of SPIE - The International Society for Optical Engineering


OtherNovel Optical Systems Design and Optimization IX
國家/地區United States
城市San Diego, CA

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程


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