发明授权
US5345807A Self-calibrating variable pressure touch key system employing
transducers subject to parameter drift
失效
采用带有参数漂移的换能器的自校准可变压力触摸键系统
- 专利标题: Self-calibrating variable pressure touch key system employing transducers subject to parameter drift
- 专利标题(中): 采用带有参数漂移的换能器的自校准可变压力触摸键系统
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申请号: US73633申请日: 1993-06-08
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公开(公告)号: US5345807A公开(公告)日: 1994-09-13
- 发明人: Orville R. Butts , Paul R. Tanner
- 申请人: Orville R. Butts , Paul R. Tanner
- 申请人地址: KY Louisville
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: KY Louisville
- 主分类号: H01H13/00
- IPC分类号: H01H13/00 ; A47J27/62 ; F24C7/06 ; F24C7/08 ; G01L1/14 ; G01L5/22 ; G01L25/00 ; H03K17/975 ; G01L27/00
摘要:
A pressure sensitive touch pad system, for example employing variable capacitance touch pads, employs low cost transducers subject to parameter drift and periodically (e.g. once each second) re-calibrates each touch pad. The periodic re-calibration allows a low cost transducer to be used for multi-point operation, as well as for simple on/off operation, such as for function selection. One application is to provide different slew rates for setting a data entry indicator, for example indicating the value of an appliance function.