发明名称 |
Optical coordinate system input device |
摘要 |
An optical coordinate system input device includes a plurality of light emitting elements aligned in X and Y directions and sequentially, selectively supplied with a drive current, and a plurality of light receptor elements opposed to the respective light emitting elements each receiving a light signal from opposed one of the light emitting elements. The device specifically includes an adjusting circuit to adjust the value of the drive current flowing in the light emitting elements.
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申请公布号 |
US4812642(A) |
申请公布日期 |
1989.03.14 |
申请号 |
US19870008625 |
申请日期 |
1987.01.29 |
申请人 |
ALPS ELECTRIC CO., LTD. |
发明人 |
HASEGAWA, KAZUO;OHUCHI, JUNICHI;SASAKI, HIROAKI |
分类号 |
G01B11/03;G06F3/033;G06F3/042;(IPC1-7):G01V9/04 |
主分类号 |
G01B11/03 |
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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