- 专利标题: Detection circuit, touch control panel, and electronic apparatus
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申请号: US17876418申请日: 2022-07-28
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公开(公告)号: US11853098B2公开(公告)日: 2023-12-26
- 发明人: Cheng Liu
- 申请人: Chipone Technology (Beijing) Co., LTD.
- 申请人地址: CN Beijing
- 专利权人: Chipone Technology (Beijing) Co., Ltd.
- 当前专利权人: Chipone Technology (Beijing) Co., Ltd.
- 当前专利权人地址: CN Beijing
- 代理机构: Fish & Richardson P.C.
- 优先权: CN 2010187345.8 2020.03.17
- 主分类号: G06F3/041
- IPC分类号: G06F3/041
摘要:
The present disclosure relates to detection circuits, touch control panels and electronic apparatuses. The circuit includes: a charge amplifier including a first input terminal, a second input terminal and an output terminal; a feedback capacitor, both ends of which are electrically connected to the first input terminal and the output terminal respectively, wherein the feedback capacitor is in parallel connection with a first switch; and a sensor electrode electrically connected to the first input terminal. A first excitation signal is applied to a thin film transistor (TFT) in a touch control panel where the detection circuit is located. A second excitation signal is applied to the second input terminal, wherein the first excitation signal is in-phase with the second excitation signal. An amplitude of the first excitation signal is larger than an amplitude of the second excitation signal.
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