发明名称 |
SCANNING-LIGHT TOUCH PANEL |
摘要 |
<p>In order to measure a scanning light cut-off region, an output of a light receiving element and a threshold value set by an MPU are compared by a comparator and a region where the former is smaller than the latter is measured as the scanning light cut-off region. During one cycle of optical scanning, this threshold value is switched in a plurality of stages according to the scanning angle. By accurately measuring the scanning light cut-off region, the correct position and size of an indicator such as a finger or pen are calculated.</p> |
申请公布号 |
EP1139207(B1) |
申请公布日期 |
2007.10.03 |
申请号 |
EP19990922636 |
申请日期 |
1999.06.01 |
申请人 |
FUJITSU LIMITED |
发明人 |
NAKAZAWA, FUMIHIKO;SANO, SATOSHI;IIDA, ATSUO;YAMAGUCHI, NOBUYASU;IWAMOTO, YASUHIDE |
分类号 |
G06F3/033;G06F3/042;G06F3/03;G06F3/041;G06F3/048 |
主分类号 |
G06F3/033 |
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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