Optical characteristic of the light guide plate with microstructures engraved by laser

Tun Chien Teng*, Ming Feng Kuo

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

4 引文 斯高帕斯(Scopus)

摘要

In this paper, we investigated the optical characteristic of the light guide plate (LGP) with microstructures engraved by a CO2 laser. The LGP is for edge-lit backlighting of liquid crystal display. Traditionally, the microstructures on largescaled LGP are formed by screen-printing, which are hardly formed by inject molding. However, the screen-printed LGP highly scatters light and has lower optical efficiency. Therefore, a method was proposed to use the laser to directly engrave the flat surface of a bare LGP with microstructures. The engraved LGP has better optical performance due to the polished surface of the engraved-microstructures, and can be used for large-scaled application such LCD TV backlighting. We used different processing parameters to engrave the microstructures of 11 different shapes on a bare LGP and measured the cross-sectional dimensions of the microstructure. Among them, five kinds of shapes were chosen to be engraved on the bare LGPs respectively as samples. The five LGP samples were measured for spatial and angular luminance by the BM7 and Conoscope. With difference in the profiles of the microstructures, the angular distributions of light emitting from the LGP also differ. All the experimental data of the samples were compared with one another and the on-axis luminance of the best LGP sample could potentially increase 50% more than the reference sample if a proper optical film was chosen to accompany it.

原文英語
主出版物標題Nonimaging Optics
主出版物子標題Efficient Design for Illumination and Solar Concentration IX
DOIs
出版狀態已發佈 - 2012
事件Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX - San Diego, CA, 美国
持續時間: 2012 8月 122012 8月 14

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
8485
ISSN(列印)0277-786X

其他

其他Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX
國家/地區美国
城市San Diego, CA
期間2012/08/122012/08/14

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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