HIGH-EFFICIENCY AND HIGH-QUALITY LCD BACKLIGHT USING HIGHLY SCATTERING OPTICAL-TRANSMISSION POLYMER

We have proposed a highly scattering optical transmission(HSOT) polyme r for use as a high efficiency light source medium. This polymer conta ins specified internal microscopic heterogeneous structures for contro lling light-transmission properties. A LCD backlighting system having a new light pipe made of this polymer has twice the brightness of the conventional one. A light scattering phenomenon inside the HSOT polyme r was quantitatively analyzed by a ray tracing simulation based on the Mie scattering theory and the Monte Carlo method. The illumination of the backlight which is optimized by using the simulation program has enough uniformity of intensity and color because of specified multiple light scattering phenomena inside the HSOT polymer. We propose the ne w backlighting system having fewer components and twice efficiency of the conventional one.