发明名称 |
Coordinate position digitizing system |
摘要 |
A coordinate position digitizing system to be used with a cathode ray tube, comprises a position determining plate having a plurality of conductors extending parallel with one another at regularly spaced intervals, and driving means for supplying a constant current selectively to the conductors, one after another, within a horizontal scanning period of the cathode ray tube. Magnetic flux detecting means detects magnetic flux on the position determining plate, and a band pass filter eliminates a noise component resulting from the deflection magnetic field of the cathode ray tube. Positional data defining a position of the magnetic flux detecting means on the position determining plate is produced in response to the output of the band pass filter.
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申请公布号 |
US4728944(A) |
申请公布日期 |
1988.03.01 |
申请号 |
US19830547385 |
申请日期 |
1983.10.31 |
申请人 |
SONY CORPORATION |
发明人 |
TAMARU, HIDESHI;SHIKAKURA, KUNIO;YOSHIDA, KIMIYOSHI;SAKANO, AKIO;KITAMURA, NOBUO |
分类号 |
G06F3/046;G06F3/033;(IPC1-7):G08C21/00 |
主分类号 |
G06F3/046 |
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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