Efficient polarized backlight for transflective liquid crystal display illumination

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作者：
机构：
[1] Chien, Ko-Wei
[2] Shieh, Han-Ping D.
[3] Cornelissen, Hugo J.
来源：
Chien, K.-W. (dodu.eo88g@nctu.edu.tw) | 1818年 / Japan Society of Applied Physics卷 / 44期
关键词：
Birefringence - Diffractive optics - Electromagnetic wave diffraction - Lenses - Light polarization - Light reflection - Light sources - Lighting - Refractive index;
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摘要：
A collimated backlight was designed for high-efficiency transflective liqud crystal display (LCD) illumination. Additionally, polarization separation was achieved by selective total internal reflection at microgrooves in polymeric foils, which were stretched to be anisotropic materials for easy fabrication and tunable birefringence. A lenticular lens array was then utilized to collect the collimated light of the polarized backlight to further improve light utilization efficiency. Therefore, gains of 2.91 and 1.37 in light utilization efficiency were obtained for transmissive and reflective modes, respectively. © 2005 The Japan Society of Applied Physics.
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