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Proceedings Paper

Planar lighting by blue LEDs array with remote phosphor
Author(s): Chung-Hao Tien; Chien-Hsiang Hung; Bo-Wen Xiao; Hsin-Tao Huang; Yi-Pai Huang; Chuang-Chuang Tsai
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Paper 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.

Paper Details

Date Published: 12 February 2010
PDF: 8 pages
Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 761707 (12 February 2010); doi: 10.1117/12.841218
Show Author Affiliations
Chung-Hao Tien, National Chiao Tung Univ. (Taiwan)
Chien-Hsiang Hung, National Chiao Tung Univ. (Taiwan)
Bo-Wen Xiao, National Chiao Tung Univ. (Taiwan)
Hsin-Tao Huang, National Chiao Tung Univ. (Taiwan)
Yi-Pai Huang, National Chiao Tung Univ. (Taiwan)
Chuang-Chuang Tsai, National Chiao Tung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7617:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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