Fabrication and optical design of pyramid microstructure on the base of light guide used for the backlight module

Jee Gong Chang, Chien Wei Liu, Yu Bin Fang, Jian Ming Lu, Wang-Long Li, Shin Pon Ju

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publication5th International Symposium on Advanced Optical Manufacturing and Testing Technologies
Subtitle of host publicationDesign, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
DOIs
Publication statusPublished - 2010 Dec 27
Event5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems - Dalian, China
Duration: 2010 Apr 262010 Apr 29

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7657
ISSN (Print)0277-786X

Other

Other5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
CountryChina
CityDalian
Period10-04-2610-04-29

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Chang, J. G., Liu, C. W., Fang, Y. B., Lu, J. M., Li, W-L., & Ju, S. P. (2010). Fabrication and optical design of pyramid microstructure on the base of light guide used for the backlight module. In 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems [76571Q] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7657). https://doi.org/10.1117/12.863358