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A novel ultra‐thin backlight system without optical sheets using a multi‐layered lightguide
Author(s) -
Ishida Takeshi,
Yuki Ryuzo
Publication year - 2011
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid19.12.923
Subject(s) - backlight , optics , materials science , reflector (photography) , prism , light guide , computer science , optoelectronics , light source , liquid crystal display , physics
— A backlight system using a newly developed multi‐layered lightguide (MLL) is described. The MLL can function as a backlight without additional optical sheets such as prism sheets or diffusers. It was developed as a multi‐layered sheet featuring different refractive indexes for different layers. A prototype was built, and the principles were confirmed by comparison with theory. With a thickness of 0.414 mm, the prototype is the thinnest backlight in the world, using only a MLL and a reflector.