High-efficiency directional backlight design for an automotive display
| Autor: | Jui-Wen Pan, Bo Tsuen Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Liquid-crystal display Materials science business.industry Illuminance Collimator Backlight Viewing angle 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics law 0103 physical sciences Vertical direction Light emission Electrical and Electronic Engineering business Engineering (miscellaneous) Light-emitting diode |
| Zdroj: | Applied Optics. 57:4386 |
| ISSN: | 2155-3165 1559-128X |
| DOI: | 10.1364/ao.57.004386 |
| Popis: | We propose a high-efficiency directional backlight module (DBM) for automotive display applications. The DBM is composed of light sources, a light guide plate (LGP), and an optically patterned plate (OPP). The LGP has a collimator on the input surface that serves to control the angle of the light emitted to be in the horizontal direction. The OPP has an inverse prism to adjust the light emission angle in the vertical direction. The DBM has a simple structure and high optical efficiency. Compared with conventional backlight systems, the DBM has higher optical efficiency and a suitable viewing angle. This is an improvement in normalized on-axis luminous intensity of 2.6 times and a twofold improvement in optical efficiency. The viewing angles are 100° in the horizontal direction and 35° in the vertical direction. The angle of the half-luminous intensity is 72° in the horizontal direction and 20° in the vertical direction. The uniformity of the illuminance reaches 82%. The DBM is suitable for use in the center information displays of automobiles. |
| Databáze: | OpenAIRE |
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