发明名称 |
Processing analog to digital converter signals to a touch screen display |
摘要 |
An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software algorithms to allow for the calibration and validation of pixel coordinate estimates as an integral part of the real-time generation of the pixel coordinate estimates. Multiple calibrated pixel coordinate estimates are generated and processed at a pre-defined sampling rate to determine a valid pixel position to minimize sampling delays due to settling times. The x-axis position is also validated before the system attempts to generate a y-axis position to avoid the wasted time for generating y-axis estimates when x-axis estimates are corrupted. Noisy estimates are inherently reduced in the touch-screen display system by providing shunts across certain drivers in the system that also allow for detection of a "no touch" state.
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申请公布号 |
US7202858(B2) |
申请公布日期 |
2007.04.10 |
申请号 |
US20040779926 |
申请日期 |
2004.02.17 |
申请人 |
AMERICAN STANDARD INTERNATIONAL INC. |
发明人 |
DEGROOT JEFFREY J.;KRAJEWSKI THOMAS G. |
分类号 |
G09G5/00;G06F3/033;G06F3/041;G06F3/045 |
主分类号 |
G09G5/00 |
代理机构 |
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地址 |
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