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Title:
DIRECTLY DOWNWARD TYPE BACKLIGHT DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/032469
Kind Code:
A1
Abstract:
A directly downward type backlight device comprising, arranged in this order, a reflection plate, a plurality of linear light sources arranged in parallel and a light diffusion plate, wherein the light diffusion plate has on at least one main plane thereof a plurality of recessed or protruding structure units each having at least three inclined side surfaces with the maximum height Rz of a main plane having structure units being up to 1,000 μm, and a portion, having the relation 12.5-10×(bL/aL)

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Inventors:
TSUKADA KEISUKE (JP)
Application Number:
PCT/JP2006/318351
Publication Date:
March 22, 2007
Filing Date:
September 15, 2006
Export Citation:
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Assignee:
ZEON CORP (JP)
TSUKADA KEISUKE (JP)
International Classes:
F21S2/00; G02F1/13357; F21Y103/00
Foreign References:
JP2002352611A2002-12-06
JPS62217501A1987-09-25
JPH10123307A1998-05-15
JPH07220512A1995-08-18
JP2004355940A2004-12-16
JP2004053998A2004-02-19
Other References:
See also references of EP 1933080A4
Attorney, Agent or Firm:
KIKUMA, Tadayuki et al. (25-10 Kajiwara 2-chom, Kamakura-shi Kanagawa, JP)
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