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Patent Searching and Data


Title:
ILLUMINATION DEVICE, DISPLAY DEVICE, AND TV RECEIVER
Document Type and Number:
WIPO Patent Application WO/2014/196235
Kind Code:
A1
Abstract:
A backlight device comprises a plurality of LEDs (28) disposed in a row; and a light guide plate (20), the long-side end surfaces of which are light incidence surfaces (20a) , and the end surfaces of which adjacent to the light incidence surfaces (20a) are adjacent end surfaces (20d). A plurality of prism-shaped, unevenly profiled portions (36) is formed on the light incidence surfaces (20a) so that the light incident on the light incidence surfaces (20a) is relatively directed to the adjacent end surfaces (20d) rather than the center of the light guide plate (20). The backlight device (24) directs the light incident on the light incidence surfaces (20a) of the light guide plate (20) toward the adjacent end surfaces (20d) via the unevenly profiled portions (36), and thus can suppress a lot of light overlapping on the center instead of on both ends of the light incidence surfaces (20a), and can prevent or suppress an uneven luminance between the center and both ends of the light emission surface (20b).

Inventors:
SHIMIZU TAKAHARU
Application Number:
PCT/JP2014/055025
Publication Date:
December 11, 2014
Filing Date:
February 28, 2014
Export Citation:
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Assignee:
SHARP KK (JP)
International Classes:
F21S2/00; G02F1/13357; H04N5/64; F21Y101/02
Foreign References:
JP2008047429A2008-02-28
JP2000299011A2000-10-24
JP2006114503A2006-04-27
Attorney, Agent or Firm:
AKATSUKI UNION PATENT FIRM (JP)
Patent business corporation dawn joint patent firm (JP)
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