Proceedings Article | 2 September 2008
Proc. SPIE. 7058, Eighth International Conference on Solid State Lighting
KEYWORDS: Reflectors, Mirrors, Light sources, Light emitting diodes, Waveguides, Sensors, Mercury, LCDs, LED backlight, LED displays
An edge-backlight unit (EBLU) is applied as the light device to provide uniform light of liquid crystal display (LCD).
Generally, the cathode cold fluorescent lamp (CCFL) is employed as the light source of BLU. With the advantages such
as long durability, no mercury substance and good endurance of heavy impact, the light emitting diode (LED) is now
accepted well known as available device for solid state lighting. To achieve the market requirement of the thin-film
liquid crystal display (LCD) and the green-level product, the LED is replaced with the CCFL used in monitor in order to
make display thinner, lighter, no Hg containing. In this paper, the integrated LED reflector is proposed because it
enables the point-like light to distribute propagating-light line pattern successfully. To optimize the size and the radian of
the reflector, our designed integrated LED reflector can achieve an optical efficiency more than 85%, and its light output
length is 11 times of the input light source. Therefore, the integrated LED reflector not only can decrease the number of
LED to save the built space, but also enhance the output efficiency. In the future, an integrated LED reflector could
make displays thinner and brighter for backlight applications.
