发明名称 |
Touch location by retroflected scanned optical beams |
摘要 |
The position of a light blocking object is detected not only within a display screen, but also outside the display screen. With the use of the function of detecting the position in a region outside the display screen, it becomes possible to provide virtual buttons in this region and detect dust around a light retro-reflector. Dirt on the light retro-reflector is detected based on the levels of light receiving signals of optical units.
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申请公布号 |
US6844539(B2) |
申请公布日期 |
2005.01.18 |
申请号 |
US20020252555 |
申请日期 |
2002.09.24 |
申请人 |
FUJITSU LIMITED |
发明人 |
IWAMOTO YASUHIDE;SANO SATOSHI;NAKAZAWA FUMIHIKO;YAMAGUCHI NOBUYASU |
分类号 |
G01B11/03;G01B11/14;G06F3/033;G06F3/042;G06M7/00;G09G5/08;G11B7/00;G11B7/085;H01J40/14;(IPC1-7):H01J40/14 |
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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