发明名称 |
Digitizer tablet using relative phase detection |
摘要 |
In a digitizer and method for laying out and using the tablet of the digitizer, wherein the tablet provides unambiguous binary code outputs. The digitizer may employe a cordless transducer and signal processing circuitry providing relative phase detection for determining coarse location of the transducer. An unambiguous binary code output is obtained with a grid layout which generates a set of unique binary codes, none of which is the the same or the binary inverse of any other member of the set.
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申请公布号 |
US5416280(A) |
申请公布日期 |
1995.05.16 |
申请号 |
US19930044139 |
申请日期 |
1993.04.08 |
申请人 |
SUMMAGRAPHICS CORPORATION |
发明人 |
MCDERMOTT, ROBERT M.;LASLEY, DANIEL G. |
分类号 |
G01B7/00;G06F3/033;G06F3/046;(IPC1-7):G08C21/00 |
主分类号 |
G01B7/00 |
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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