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公开(公告)号：US11768558B2
公开(公告)日：2023-09-26
申请号：US17552270
申请日：2021-12-15
申请人： LX Semicon Co., Ltd.
发明人： Kyu Tae Lee , Mun Seok Kang , Jae Hwan Lee , Jeong Kwon Nam , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Yeon Ju Yu
CPC分类号： G06F3/04166 , G06F3/0441 , G06F3/0442
摘要： The present disclosure provides a touch sensing circuit comprising an analog signal processing circuit configured to receive a plurality of sensing signals having different frequencies from touch electrodes; and a digital signal processing circuit configured to receive output data of the analog signal processing circuit and perform a discrete Fourier transform. In addition, the present disclosure provides a touch sensing circuit comprising the digital signal processing circuit of the touch sensing circuit that separates the plurality of sensing signals through the discrete Fourier transform and allowing a simultaneous sensing of a finger touch and a stylus pen touch.
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公开(公告)号：US11797128B2
公开(公告)日：2023-10-24
申请号：US17738659
申请日：2022-05-06
申请人： LX Semicon Co., Ltd.
发明人： Kyu Tae Lee , Mun Seok Kang , Jae Hwan Lee , Jeong Kwon Nam , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun
IPC分类号： G06F3/041
CPC分类号： G06F3/04182
摘要： The present embodiment may provide a touch sensing circuit including: an analog signal processing circuit including one or more adjustable filters configured to receive a touch sensing signal from a touch electrode of a panel and to transmit some of a frequency region of the touch sensing signal; and a touch control circuit configured to determine a change in capacitance of the touch electrode attributable to an object approaching the panel and to transmit a controlling signal to control the adjustable filters of the analog signal processing circuit. The adjustable filter of the present embodiment may include a variable resistor or a variable capacitor. A resistance value or capacitance value of the adjustable filter may be changed in response to the controlling signal, thus changing a frequency pass band of the touch sensing signal.
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公开(公告)号：US11586323B2
公开(公告)日：2023-02-21
申请号：US17552245
申请日：2021-12-15
申请人： LX Semicon Co., Ltd.
发明人： Jae Hwan Lee , Mun Seok Kang , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Yeon Ju Yu
摘要： The present disclosure relates to a touch circuit and a touch sensing method. A touch circuit may include a driving circuit configured to transmit a driving signal to a touch electrode, a sensing circuit configured to sense a change in capacitance generated in the touch electrode, and a touch control circuit configured to control a polarity of the driving signal transmitted by the driving circuit. The polarity of the driving signal controlled by the touch control circuit may be determined based on a location of the touch electrode. Touch sensitivity can be improved by differently controlling a polarity of a driving signal transmitted to an adjacent touch electrode.
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公开(公告)号：US20220197473A1
公开(公告)日：2022-06-23
申请号：US17552245
申请日：2021-12-15
申请人： LX Semicon Co., Ltd.
发明人： Jae Hwan Lee , Mun Seok Kang , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Yeon Ju Yu
摘要： The present disclosure relates to a touch circuit and a touch sensing method. A touch circuit may include a driving circuit configured to transmit a driving signal to a touch electrode, a sensing circuit configured to sense a change in capacitance generated in the touch electrode, and a touch control circuit configured to control a polarity of the driving signal transmitted by the driving circuit. The polarity of the driving signal controlled by the touch control circuit may be determined based on a location of the touch electrode. Touch sensitivity can be improved by differently controlling a polarity of a driving signal transmitted to an adjacent touch electrode.
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公开(公告)号：US20220197468A1
公开(公告)日：2022-06-23
申请号：US17552270
申请日：2021-12-15
申请人： LX Semicon Co., Ltd.
发明人： Kyu Tae Lee , Mun Seok Kang , Jae Hwan Lee , Jeong Kwon Nam , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Yeon Ju Yu
摘要： The present disclosure provides a touch sensing circuit comprising an analog signal processing circuit configured to receive a plurality of sensing signals having different frequencies from touch electrodes; and a digital signal processing circuit configured to receive output data of the analog signal processing circuit and perform a discrete Fourier transform. In addition, the present disclosure provides a touch sensing circuit comprising the digital signal processing circuit of the touch sensing circuit that separates the plurality of sensing signals through the discrete Fourier transform and allowing a simultaneous sensing of a finger touch and a stylus pen touch.
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