Title:
面状光源装置およびこれを用いた表示装置
Document Type and Number:
Japanese Patent JP4338540
Kind Code:
B2
Abstract:
A primary object of the present invention is to provide a surface light source device attaining a homogenous luminance distribution on a light emitting surface of a light guiding plate in which a dot light source having a high directivity of emitted light is employed. The device includes: a light guiding plate 5 including a plurality of primary holes in such a manner as to locate each dot light source 3 inside; and dot printing 7a being employed as an auxiliary light source means which diffuses light from the dot light source 3 to the position between dot light sources 3 being adjacent to each other, wherein the dot printing 7 is provided at a base of the light guiding plate 5 and a middle point of the connected dot light sources 3 being adjacent to each other.
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Inventors:
Seiji Sakai
Takuya Sakamoto
Toshiyuki Yoneda
Takuya Sakamoto
Toshiyuki Yoneda
Application Number:
JP2004029723A
Publication Date:
October 07, 2009
Filing Date:
February 05, 2004
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
F21S2/00; G02B6/00; F21V8/00; G02F1/13357; F21Y101/02
Domestic Patent References:
| JP2002197914A | ||||
| JP4124201U | ||||
| JP2001014922A | ||||
| JP2003242817A |
Attorney, Agent or Firm:
Sota Asahina
Kei Saki
Fumio Akiyama
Kei Saki
Fumio Akiyama