Date
Place
- Room H (Room Hall 1, 1F)
- P1. Poster Session I
- August 20, 2015 (Thursday)
- 14:00 ~ 15:30
- [P1-98]
- 14:00 ~ 15:30
- Title:LED Backlight with Special FOV for Automobile
- Feng Qibin, Yin Huijuan (Hefei Univ. of Tech., China), Shi Zuchuan, Feng Qingang, Li Dejun, Fang Xudong (Hefei BOE Display Lighting Co., Ltd., China), and Lv Guoqiang (Hefei Univ. of Tech., China)
Abstract: The LCDs (Liquid crystal displays, LCDs) used in automobile have to present wide field of viewing (FOV), which cause the cost increase.? Different from LCDs in common life, it would be beneficial for the LCDs in automible to have the high lumiance at the viewing angel of horizontal 0¡Æand vertical 20¡Æto make the emitting lights from LCDs as most effiecient as possible. To realize the special FOV, the paper designs a kind of optical film with micro-structure on the front side to direct the most lights to the required angel. The not-imaging optical theory is applied to design the micro-structure on the film. The simulation model and result are shown in the Figure 1. It can be seen that the horizontal angel curve is symmetrical about the?nromal direction with the highest luminance at the angel of 0¡Æ. While the highest lumiance of the vertical angel viewing curve happens at the 22¡Æ, satisfying the FOV requirement. The designed film is manufactured and the LED backlight prototype with such film is developed. The practical viewing angel curve is measured by ELDIM, shown in the Figure 2.?
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