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Patent Searching and Data


Title:
BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/101714
Kind Code:
A1
Abstract:
A backlight device (2) comprises: a light source section (3) formed from a plurality of light emitting diodes (9) and lenses (10) that extend the light from the light emitting diodes (9); a housing (4) that accommodates this light source section (3); a diffusion plate (5) disposed so as to cover an opening part (6a) in this housing (4); and a reflecting sheet (6) that reflects light irradiated from the light source (3) to the diffusion plate (5) side. The light source section (3) is constituted by arranging and disposing the plurality of light emitting diodes (9) and plurality of lenses (10) in a middle part thereof, and the distribution of luminance of the part corresponding to the light source section (3) as seen from the diffusion plate (5) side has a middle region (C) showing a peak value for the luminance, attenuating regions (D) wherein the luminance gradually attenuates moving toward the left and right ends from this middle region (C), and end regions (E) having a distribution part in which the luminance does not attenuate.

Inventors:
HAYASHI KATSUHIKO
MATSUKI DAIZABURO
HASEGAWA KENJI
YAMAGUCHI HIROSHI
Application Number:
PCT/JP2011/006752
Publication Date:
August 02, 2012
Filing Date:
December 01, 2011
Export Citation:
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Assignee:
PANASONIC CORP (JP)
HAYASHI KATSUHIKO
MATSUKI DAIZABURO
HASEGAWA KENJI
YAMAGUCHI HIROSHI
International Classes:
F21S2/00; F21V3/00; F21V5/00; F21V5/04; G02F1/13357; H01L33/58; F21Y101/02
Domestic Patent References:
WO2010001649A12010-01-07
Foreign References:
JP2010009785A2010-01-14
JP2010122417A2010-06-03
JP2008293968A2008-12-04
JP2004220981A2004-08-05
Attorney, Agent or Firm:
OGASAWARA PATENT OFFICE (JP)
Patent business corporation Ogasawara patent firm (JP)
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Claims: