Title:
【発明の名称】画状照明装置および液晶表示装置
Document Type and Number:
Japanese Patent JP3256970
Kind Code:
B2
Abstract:
A surface-type illumination device suitable for use in such things as a backlight in a liquid crystal display, which provides a uniform light distribution over its surface, comprises a light guide plate (21) which is polygon-shaped and substantially transparent; an elongated illuminant element (22) formed to include an L-shaped section whereby to face at least first and second side edges (41c,d) of said light guide plate; and a diffusion pattern (50,52) disposed on one side of said light guide plate, wherein that the thickness of the light guide plate and/or the diffusion pattern is computed such that a substantially uniform light distribution is provided on a side of said light guide plate.
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| JP2011054299 | LIQUID CRYSTAL DISPLAY DEVICE |
| JPH1195031 | OPTICAL FIBER CABLE |
Inventors:
Tatsuaki Funamoto
Tohru Yagasaki
Fumiaki Akahane
Tohru Yagasaki
Fumiaki Akahane
Application Number:
JP50092094A
Publication Date:
February 18, 2002
Filing Date:
July 13, 1993
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G02B6/00; F21S2/00; F21V8/00; G02B6/42; G02F1/1335; G02F1/13357; G02F1/1345; G09F9/00; H01J61/30; F21Y103/00; F21Y103/02; G02B; G02F; (IPC1-7): G02B6/00; F21V8/00; G02F1/13357
Domestic Patent References:
| JP1183626A | ||||
| JP3201304A | ||||
| JP63309918A | ||||
| JP57128383A | ||||
| JP6445002A | ||||
| JP6445003A | ||||
| JP462519A | ||||
| JP3238490A | ||||
| JP3118594A | ||||
| JP2126501A | ||||
| JP4939378U | ||||
| JP4949874U | ||||
| JP129709U |
Other References:
【文献】米国特許4974122(US,A)
【文献】米国特許4842378(US,A)
【文献】米国特許4811507(US,A)
【文献】米国特許3892959(US,A)
【文献】仏国特許出願公開2620795(FR,A1)
【文献】米国特許4842378(US,A)
【文献】米国特許4811507(US,A)
【文献】米国特許3892959(US,A)
【文献】仏国特許出願公開2620795(FR,A1)
Attorney, Agent or Firm:
Masataka Ueyanagi