发明名称 |
Surface light source device |
摘要 |
A light guide plate includes a light introducing portion which is positioned facing a point light source and which confines light, and a light guide plate body which is thinner than a maximum thickness of the light introducing portion and which causes a light exit means to emit the confined light outward. The light introducing portion has an inclined face which is inclined from a portion having the maximum thickness to a surface of the light guide plate body. The inclined face includes a directivity converting pattern for converting a directional characteristic of the light that has entered the light introducing portion. The directivity converting pattern's structure includes a plurality of V-shaped grooves. An inscribed circle of the directivity converting pattern passes through both ends of a light exit window of the point light source. |
申请公布号 |
US8210730(B2) |
申请公布日期 |
2012.07.03 |
申请号 |
US201113163298 |
申请日期 |
2011.06.17 |
申请人 |
KURATA GOUO;HIROTA KAZUHIDE;OMRON CORPORATION |
发明人 |
KURATA GOUO;HIROTA KAZUHIDE |
分类号 |
G02F1/1335 |
主分类号 |
G02F1/1335 |
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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