- 专利标题: Control chip for touch panel with high sensitivity
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申请号: US16991277申请日: 2020-08-12
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公开(公告)号: US11599221B2公开(公告)日: 2023-03-07
- 发明人: Sung-Han Wu
- 申请人: PixArt Imaging Inc.
- 申请人地址: TW Hsin-Chu County
- 专利权人: PixArt Imaging Inc.
- 当前专利权人: PixArt Imaging Inc.
- 当前专利权人地址: TW Hsin-Chu County
- 代理机构: WPAT, PC
- 优先权: TW104109783 20150326
- 主分类号: G06F3/041
- IPC分类号: G06F3/041 ; G06F3/044
摘要:
There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes a detection electrode configured to form a self-capacitor. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrode to output a differential detected signal, and identifies a touch event according to an amplified differential detected signal so as to improve the touch sensitivity.
公开/授权文献
- US20200371623A1 CONTROL CHIP FOR TOUCH PANEL WITH HIGH SENSITIVITY 公开/授权日:2020-11-26