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 a 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 |
US2003058226(A1) |
申请公布日期 |
2003.03.27 |
申请号 |
US20020279300 |
申请日期 |
2002.10.24 |
申请人 |
BERTRAM WILLIAM K.;PEASE LOGAN L. |
发明人 |
BERTRAM WILLIAM K.;PEASE LOGAN L. |
分类号 |
G06F3/041;G06F3/033;G06F3/044;G06F3/048;(IPC1-7):G09G5/00;G09G1/00 |
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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