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57.4: Thin Side‐Lit, Hollow‐Cavity Flat LED Lighting Panel for Ultra‐Uniform LCD Backlight Applications
Author(s) -
Tsuchiya Ryuji,
Kawasaki Yoji,
Ikebe Shota,
Shiba Toshiaki,
Kinoshita Junichi
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069812
Subject(s) - backlight , optics , collimated light , collimator , materials science , liquid crystal display , reflector (photography) , planar , light emitting diode , lens (geology) , light guide , flat panel , optoelectronics , diffuser (optics) , light source , physics , computer science , computer graphics (images) , laser
A new and thin, FL 2 P(Flat LED Lighting Panel) with ultra‐high‐uniformity for LCD backlight is presented. It has a hollow‐cavity structure consisting of a pair of LED/collimator units, a slightly curved bottom reflector and a top diffuser, without any planar light guide inside. It has a great advantage of making itself thinner, less weight and lower cost. The LED/collimator unit has a collimating cylindrical lens and a side‐placed RGB LED array. The collimating lens is developed particularly for higher‐coupling efficiency and narrower beam to achieve thinner structure and more excellent uniformity.

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