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公开(公告)号：US20190129533A1
公开(公告)日：2019-05-02
申请号：US16022710
申请日：2018-06-29
Applicant: Novatek Microelectronics Corp.
Inventor： I-Te Liu , Wei-Zen Chen
IPC: G06F3/044
Abstract: A readout circuit of a touch panel is provided. The readout circuit includes a charge modulator and a correlated double sampling demodulator. The charge modulator is configured to provide a driving current to charge or discharge a sensing electrode of the touch panel and generate a sensing voltage signal. The correlated double sampling demodulator is coupled to the charge modulator. The correlated double sampling demodulator is configured to sample the sensing voltage signal to obtain a voltage variation when a touch event happens. A method for driving the touch panel is also provided.
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公开(公告)号：US10585539B2
公开(公告)日：2020-03-10
申请号：US16022710
申请日：2018-06-29
Applicant: Novatek Microelectronics Corp.
Inventor： I-Te Liu , Wei-Zen Chen
Abstract: A readout circuit of a touch panel is provided. The readout circuit includes a charge modulator and a correlated double sampling demodulator. The charge modulator is configured to provide a driving current to charge or discharge a sensing electrode of the touch panel and generate a sensing voltage signal. The correlated double sampling demodulator is coupled to the charge modulator. The correlated double sampling demodulator is configured to sample the sensing voltage signal to obtain a voltage variation when a touch event happens. A method for driving the touch panel is also provided.
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