发明名称 |
Proximity switch having differential contact surface |
摘要 |
A proximity switch assembly and method for activating a proximity switch is provided. The assembly includes a proximity sensor generating a signal, and a contact surface proximate to the proximity sensor and having a differential elevation change feature. The proximity switch also includes control circuitry processing the signal to detect a differential increase in the activation signal indicative of a hard press on the contact surface. The control circuitry detects activation of the switch based on the differential increase exceeding a differential threshold. Activation can further be determined based on a stable signal. |
申请公布号 |
US9197206(B2) |
申请公布日期 |
2015.11.24 |
申请号 |
US201213444424 |
申请日期 |
2012.04.11 |
申请人 |
Ford Global Technologies, LLC |
发明人 |
Salter Stuart C.;Buttolo Pietro;Gardner Cornel Lewis |
分类号 |
H03K17/96;H03K17/94;H03K17/975;H03K17/955 |
主分类号 |
H03K17/96 |
代理机构 |
Price Heneveld LLP |
代理人 |
Chea Vichit;Price Heneveld LLP |
主权项 |
1. A proximity switch comprising:
a proximity sensor generating a signal; a contact surface proximate to the proximity sensor and comprising a differential elevation change feature; and control circuitry processing the signal to detect a first substantially stable state of the signal, followed by a differential increase in the signal indicative of a press by a user on the contact surface, followed by a second substantially stable state of the signal, wherein the control circuitry detects activation of the switch based on the detected first substantially stable state followed by the differential increase exceeding a differential threshold and the following second substantially stable state. |
地址 |
Dearborn MI US |