发明授权
- 专利标题: Capacitive keypad position sensor with low cross-interference
- 专利标题(中): 具有低交叉干扰的电容式键盘位置传感器
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申请号: US14230003申请日: 2014-03-31
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公开(公告)号: US09178511B2公开(公告)日: 2015-11-03
- 发明人: Changchao Shi , Yonggang Chen , Dechang Wang
- 申请人: Changchao Shi , Yonggang Chen , Dechang Wang
- 申请人地址: US TX Austin
- 专利权人: FREESCALE SEMICONDUCTOR, INC.
- 当前专利权人: FREESCALE SEMICONDUCTOR, INC.
- 当前专利权人地址: US TX Austin
- 代理商 Charles Bergere
- 优先权: CN201310237859 20130617
- 主分类号: H03K17/96
- IPC分类号: H03K17/96
摘要:
A capacitive keypad position sensor includes a keypad touch panel having a first defined key area disposed in a plane having first and second orthogonal axes. First and second electrodes respectively occupy first and second areas below the first defined key area. Each electrode includes a plurality of parallel rows extending along the first axis and spaced apart from one another along the second axis. Each of the plurality of rows has a length along the first axis that is substantially equal to a width of the first defined key area along the first axis measured at a position along the second axis corresponding to the respective one of the plurality of rows. At least some of the first and second pluralities of rows are interleaved with one another.
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