Invention Grant
- Patent Title: Capacitive keypad position sensor with low cross-interference
- Patent Title (中): 具有低交叉干扰的电容式键盘位置传感器
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Application No.: US14230003Application Date: 2014-03-31
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Publication No.: US09178511B2Publication Date: 2015-11-03
- Inventor: Changchao Shi , Yonggang Chen , Dechang Wang
- Applicant: Changchao Shi , Yonggang Chen , Dechang Wang
- Applicant Address: US TX Austin
- Assignee: FREESCALE SEMICONDUCTOR, INC.
- Current Assignee: FREESCALE SEMICONDUCTOR, INC.
- Current Assignee Address: US TX Austin
- Agent Charles Bergere
- Priority: CN201310237859 20130617
- Main IPC: H03K17/96
- IPC: H03K17/96

Abstract:
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.
Public/Granted literature
- US20140367239A1 CAPACITIVE KEYPAD POSITION SENSOR WITH LOW CROSS-INTERFERENCE Public/Granted day:2014-12-18
Information query
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