High directional backlight using an integrated light guide plate

Yi-Jun Wang, Shi-Hong Ouyang, Wei-Chung Chao, Jian-Gang Lu, Han-Ping Shieh

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


A high directional backlight system that combined a composite microstructure light guide plate (LGP) with a collimated light source was proposed for eco-displays. The collimated planar light was expanded from a point light source and guided towards the normal direction by utilizing the micro-prism array on LGP. High uniformity of spatial luminous, 91%, with a narrow viewing cone of +/- 4 degrees can be achieved without additional optical films. Moreover, compared to the conventional backlight, only 5% of power consumption was needed to keep the same luminance, hence, the optical efficiency increased by a factor of 1.47. (C) 2015 Optical Society of America
Original languageEnglish
Pages (from-to)1567-1575
Number of pages9
JournalOptics Express
Issue number2
StatePublished - 26 Jan 2015



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