发明名称 |
OPERATION DEVICE AND IMAGE READING APPARATUS |
摘要 |
A touch panel includes a ring-like shaped light-transmissive portion. A ring-shaped diffusion surface is formed on the bottom surface of a light guide element. The ring-like shape includes a second region provided at a location corresponding to two light sources adjacent to a first region corresponding to one light source. A distance from a location of the ring-shaped light-transmissive portion to a periphery of the ring close to the light source is greater in the second region than in the first region. Light emitted from the light source and incident to the light guide element is diffusion-reflected on the diffusion surface and a part of the diffusion-reflected light illuminates the light-transmissive portion.
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申请公布号 |
US2011299129(A1) |
申请公布日期 |
2011.12.08 |
申请号 |
US201113074447 |
申请日期 |
2011.03.29 |
申请人 |
ISHIDA YASUSHI;OGUSHI HIROSHI;SHIMOYAMA NOBORU;CANON KABUSHIKI KAISHA |
发明人 |
ISHIDA YASUSHI;OGUSHI HIROSHI;SHIMOYAMA NOBORU |
分类号 |
H04N1/32;F21V8/00 |
主分类号 |
H04N1/32 |
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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