发明名称 |
REDUCED NOISE TOUCH SCREEN APPARATUS AND METHOD |
摘要 |
A touch screen having a high or fine resolution at relatively low cost is provided. In one embodiment, electrodes are placed directly on the surface of a CRT screen without the need for an electrode positioned on the rear surface. The touch screen may include a conductive coating and protective coating which are preferably provided in a single vacuum chamber step. A high gain system including a high-frequency sampling bandpass filter provide discrimination of the desired signal over noise. A screen calibration technique is used to achieve linearization in order to convert the electric signals obtained from the screen into data indicative of the position of a touch on the screen.
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申请公布号 |
CA2154648(C) |
申请公布日期 |
2000.12.05 |
申请号 |
CA19952154648 |
申请日期 |
1995.07.25 |
申请人 |
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发明人 |
BERTRAM, WILLIAM K.;PEASE, LOGAN L. |
分类号 |
G06F3/041;G06F3/033;G06F3/044;G06F3/048;(IPC1-7):G06K11/00;G08C21/00;H01J29/00;H01J9/14;H01J29/86 |
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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