Strategy for developing high efficiency backlight module for LCD

Cheng-Huan Chen*, Po Hung Yao, Chun Ruei Yang, Po Chou Chen, Chi Jui Chung, Po Chun Lin, Chien Li Wu, Cheng Kuo Sung, Chien Chung Fu, Meng Chi Huang, Han Ping Yang, Folcon Lin, Norio Sugiura

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The major efficiency loss in current liquid crystal displays(LCD) are the absorption in polarizers and color filter, and both can be resolved with decent backlight design which takes light polarization and color separation into consideration. Those improvement schemes on the backlight normally will not trade off the image quality readily achieved in the commercial LCD. Both polarization and color separation schemes for the backlight are reviewed with categorization on the basic concept, followed by the proposal of possible combinations for both direct lit and edge lit configuration with the consideration on the availability of associated components. Two total solutions, including polarization conversion module for LED and pixelized backlight with RGB LED for direct lit and edge lit respectively, are given with demonstration of preliminary result achieved so far as the efficiency improvement schemes for LCD backlight.

Original languageEnglish
Title of host publicationAdvances in Display Technologies II
StatePublished - 27 Feb 2012
EventAdvances in Display Technologies II - San Francisco, CA, United States
Duration: 25 Jan 201226 Jan 2012

Publication series

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


ConferenceAdvances in Display Technologies II
CountryUnited States
CitySan Francisco, CA


  • LED backlight
  • Liquid crystal display
  • pixelized backlight
  • polarized backlight

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