发明名称 |
Information display device capable of increasing detection speed and detection accuracy of input coordinates on display screen by detecting movement amount of electronic pen |
摘要 |
There is provided an information display device in which speed of detecting input coordinates on a display screen is increased. A coordinate detection circuit 7 detects indication coordinates at a tip end of an electronic pen 6 based on an induction voltage induced at a detection electrode of the electronic pen 6 in scanning a row electrode G and a column electrode S. A coordinate output circuit 17 obtains indication coordinates at the tip end of the electronic pen 6 based on a movement amount detection signal from a movement amount detecting section 20 of the electronic pen 6. A coordinate signal generating circuit 18 outputs an x-coordinate signal and a y-coordinate signal by combining the indication coordinates detected by the coordinate detection circuit 7 and the indication coordinates obtained by the coordinate output circuit 17. Thus by filling an interval between the indication coordinates detected by the coordinate detection circuit 7 with indication coordinates obtained by the coordinate output circuit 17, an apparent detection speed of the input coordinates can be increased.
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申请公布号 |
US5631670(A) |
申请公布日期 |
1997.05.20 |
申请号 |
US19940329252 |
申请日期 |
1994.10.26 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
TOMIYOSHI, AKIRA;KAWAGUCHI, TAKAFUMI;TAKEDA, MAKOTO |
分类号 |
G06F3/041;G06F3/033;G06F3/044;G06F3/048;G09G3/36;(IPC1-7):G09G5/00 |
主分类号 |
G06F3/041 |
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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