Optical Design of Direct Backlight Modules with White LEDs

摘要

[[abstract]]This paper present an upside-down cone-shaped structure placed above the LEDs in 17-inch LCD direct backlight module, apply theory in ray-tracing optical, and use the LightTools software. Thus the light rays emitted from the LEDs can alter properating directions, and the directly upward light intensity can be reduced. Using this structure to construct the backlight module, the light intensity of LED light sources can be redistributed, and the LCD panel can be illuminated more uniformity. The backlight module with LED light sources (LXHL-PW01) produced by the Lurnileds. When the 9-point measurement technology is applied, the average luminatnce of uniformity can be improved from 70% to 80%.