Invention Grant
- Patent Title: Elimination of environmental interference to a capacitive touch pad by a dummy trace
- Patent Title (中): 通过虚拟轨迹消除对电容式触摸板的环境干扰
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Application No.: US13438096Application Date: 2012-04-03
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Publication No.: US08823680B2Publication Date: 2014-09-02
- Inventor: Han-Chang Ho , Cheng-Hui Lin , Kuo-Ming Huang , Kuo-Tai Wang
- Applicant: Han-Chang Ho , Cheng-Hui Lin , Kuo-Ming Huang , Kuo-Tai Wang
- Applicant Address: TW Hsinchu
- Assignee: Elan Microelectronics Corporation
- Current Assignee: Elan Microelectronics Corporation
- Current Assignee Address: TW Hsinchu
- Agency: Rosenberg, Klein & Lee
- Priority: TW100112250A 20110408
- Main IPC: G06F3/044
- IPC: G06F3/044
Abstract:
A capacitive touch pad includes a sensor layer for sensing a touch of an object and a dummy trace below the sensor layer. The dummy trace is sensed to obtain a sensed value while the dummy trace is shielded by the sensor layer from interference of the object such that the sensed value reflects only environmental variation. Therefore, environmental variation can be identified depending on the sensed value, and the sensor layer can be calibrated properly.
Public/Granted literature
- US20120256875A1 ELIMINATION OF ENVIRONMENTAL INTERFERENCE TO A CAPACITIVE TOUCH PAD BY A DUMMY TRACE Public/Granted day:2012-10-11
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