Title:
SURFACE LIGHT SOURCE DEVICE AND APPRATUS USING THE DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/121640
Kind Code:
A1
Abstract:
Two light sources (33A, 33B) are disposed on the light incident surface side of a light guide plate (32). Deflection pattern elements (53A, 53B) are disposed concentrically around the middle point Q between the light sources (33A, 33B). One deflection pattern element (53A) is disposed so that, in plane view, the direction of a normal to the light reflection surface thereof is in parallel to the direction of a line connecting with the corresponding light source (33A). The other deflection pattern element (53B) is also disposed so that, in plane view, the direction of a normal to the light reflection surface thereof is in parallel to the direction of a line connecting with the corresponding light source (33B). Such an arrangement improves the brightness of a surface light source device.
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Inventors:
HIROTA KAZUHIDE (JP)
SHINOHARA MASAYUKI (JP)
SHINOHARA MASAYUKI (JP)
Application Number:
PCT/JP2005/010694
Publication Date:
December 22, 2005
Filing Date:
June 10, 2005
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
HIROTA KAZUHIDE (JP)
SHINOHARA MASAYUKI (JP)
HIROTA KAZUHIDE (JP)
SHINOHARA MASAYUKI (JP)
International Classes:
G02B6/00; F21V8/00; G02B5/02; G02F1/1335; G02F1/13357; F21Y101/02; (IPC1-7): F21V8/00; G02B6/00; G02F1/1335; G02F1/3357
Foreign References:
| JP2002062435A | 2002-02-28 | |||
| JP2003270446A | 2003-09-25 | |||
| JP2003330021A | 2003-11-19 | |||
| JP3151830B2 | 2001-04-03 |
Attorney, Agent or Firm:
Nakano, Masayoshi (3-5 Tanimachi 1-chome, Chuo-k, Osaka-shi Osaka 12, JP)
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