发明名称 |
Surface light source device |
摘要 |
A wedge-shaped light scattering guide plate 10 employed in a surface light source device of side-light type has a width equal to the length of a primary light source element. An incidence end surface 11 is formed as a matte surface (rough surface) by a matting process. The incidence end surface 11 is provided with roughness which is uniform or increases toward end portions. The roughened incidence end surface 11 produces scattered light in the vicinity of the incidence end surface, especially at both side end portions. The scattered light contributes to elimination of variation in luminance which tends to occur in the vicinity of the incidence end surface 11. A light diffusing plate may be interposed between the primary light source element and the light scattering guide plate.
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申请公布号 |
US5961197(A) |
申请公布日期 |
1999.10.05 |
申请号 |
US19960762802 |
申请日期 |
1996.12.09 |
申请人 |
ENPLAS CORPORATION;YASUHIRO KOIKE |
发明人 |
WATAI, KAYOKO;SASAKO, HIROMI |
分类号 |
F21V8/00;G02B6/00;(IPC1-7):F21V8/00 |
主分类号 |
F21V8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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