Planar lighting by blue LEDs array with remote phosphor

Chung-Hao Tien; Chien-Hsiang Hung; Bo-Wen Xiao; Hsin-Tao Huang; Yi-Pai Huang; Chuang-Chuang Tsai

doi:10.1117/12.841218

11 February 2010 Planar lighting by blue LEDs array with remote phosphor

Chung-Hao Tien; Chien-Hsiang Hung; Bo-Wen Xiao; Hsin-Tao Huang; Yi-Pai Huang; Chuang-Chuang Tsai

Author Affiliations +

Proceedings Volume 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV; 761707 (2010) https://doi.org/10.1117/12.841218
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

A novel direct-emitting LED backlit for LCDs was demonstrated. Unlike the conventional white LED schemes for display applications, proposed blue light excited planar lighting (BLPL) exploits blue LED chip to remotely excite the YAG-phosphor film and thus render a uniform planar source, where the YAG-phosphor acts as the diffuser film and wavelength down converter simultaneously. Based on the diffusing characterization of YAG-phosphor layer, we examined the optical properties of the BLPL system in viewpoints of uniformity, luminance and mixing capability. Consequently, a prototype 10-mm-thickness BLPL module was demonstrated with 86% uniformity and 9800 nits without using any diffuser film or light guiding plate.

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Chung-Hao Tien, Chung-Hao Tien, Chien-Hsiang Hung, Chien-Hsiang Hung, Bo-Wen Xiao, Bo-Wen Xiao, Hsin-Tao Huang, Hsin-Tao Huang, Yi-Pai Huang, Yi-Pai Huang, Chuang-Chuang Tsai, Chuang-Chuang Tsai, } "Planar lighting by blue LEDs array with remote phosphor", Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 761707 (11 February 2010); doi: 10.1117/12.841218; https://doi.org/10.1117/12.841218

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