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Proceedings Paper

Fabrication and optical design of pyramid microstructure on the base of light guide used for the backlight module
Author(s): Jee-Gong Chang; Chien-Wei Liu; Yu-Bin Fang; Jian-Ming Lu; Wang-Long Li; Shin-Pon Ju
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Paper Abstract

This paper proposed the pyramid microstructure (PYM) used on the base of the light guide as the micro-optical components to replace the conventional diffuser dot made by direct etching on the steel stamper. The PYM is made by MEMS technology, which uses silicon wafer as original mold of PYM and to replicate it on Ni micro-mold by using electroforming method. The effective optical design tool is used to find the optimal distribution of the PYM, which integrates the random microstructure generation scheme developed based on the molecular dynamics method and the optical commercial software. The SEM images show the intact PYM can be produced on the Si micro-mold and replicated fully on the Ni micro-mold by the electroforming process. The intact PYM on the base of the light guide can also be produced by the injection molding showing the complete transformation of the Ni micro-mold to the light guide. The luminance measurement of a 2.4 inches backlight module with 4 LEDs shows the average luminance of 4769 nit with 86.3% uniformity for the PYM on the base of light guide, which is 10% higher than that for the diffuser dot microstructure.

Paper Details

Date Published: 22 October 2010
PDF: 10 pages
Proc. SPIE 7657, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 76571Q (22 October 2010); doi: 10.1117/12.863358
Show Author Affiliations
Jee-Gong Chang, National Ctr. for High-Performance Computing (Taiwan)
Chien-Wei Liu, National Yunlin Univ. of Science and Technology (Taiwan)
Yu-Bin Fang, National Ctr. for High-Performance Computing (Taiwan)
Jian-Ming Lu, National Ctr. for High-Performance Computing (Taiwan)
Wang-Long Li, National Cheng Kung Univ. (Taiwan)
Shin-Pon Ju, National Sun-Yat-Sen Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7657:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
Tianchun Ye; Sen Han; Masaomi Kameyama; Song Hu, Editor(s)

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