发明名称 |
Acoustic contact sensor for handwritten computer input |
摘要 |
An acoustic contact sensor for handwritten computer input is disclosed herein. The contact sensor comprises ultrasonic sending transducer means, receiving transducer means and circuit means for providing a logic signal to a computer when contact is made. The sending and receiver transducer means can either individually be coupled to a pen stylus or writing and/or display surface.
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申请公布号 |
US4845684(A) |
申请公布日期 |
1989.07.04 |
申请号 |
US19860939383 |
申请日期 |
1986.12.09 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GARWIN, RICHARD L.;LEVINE, JAMES L.;SCHAPPERT, MICHAEL A. |
分类号 |
G06F3/041;G06F3/033;G06F3/043 |
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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