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公开(公告)号：US10942604B2
公开(公告)日：2021-03-09
申请号：US16718632
申请日：2019-12-18
Applicant: SILICON WORKS CO., LTD.
Inventor： Hee Jin Lee , Jae Hwan Lee , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Kyung Min Shin , Mun Seok Kang
Abstract: Disclosed is a touch sensing device for preventing touch sensing performance from being reduced by a parasitic capacitance. The touch sensing device includes a plurality of buffers buffering a difference between a reference signal and a reception signal received from a touch electrode and generating first and second currents corresponding to a buffered signal, a plurality of current mirror units generating a first output signal using a first mirror current generated through mirroring of the first current and a third mirror current generated through mirroring of the second current and generate a second output signal using a second mirror current generated through mirroring of the first current and a fourth mirror current generated through mirroring of the second current, and a plurality of integrators integrating a difference between the first output signal from an nth current mirror unit and the second output signal from an (n−1)th current mirror unit.
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公开(公告)号：US11294524B2
公开(公告)日：2022-04-05
申请号：US17122316
申请日：2020-12-15
Applicant: SILICON WORKS CO., LTD.
Inventor： Hee Jin Lee , Jae Hwan Lee , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Kyung Min Shin , Mun Seok Kang
Abstract: The present disclosure provides a technology for mitigating retransmission in a low ground mass (LGM) state and improving the touch sensitivity by not driving two adjacent sensor electrodes simultaneously.
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公开(公告)号：US11029777B2
公开(公告)日：2021-06-08
申请号：US16719072
申请日：2019-12-18
Applicant: SILICON WORKS CO., LTD.
Inventor： Hee Jin Lee , Jae Hwan Lee , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Kyung Min Shin , Mun Seok Kang
Abstract: Disclosed is a touch sensing device for preventing touch sensing performance from being reduced by a parasitic capacitance. The touch sensing device includes a plurality of buffers buffering a difference between a reference signal and a reception signal received from a touch electrode through a touch sensing line and generating first and second currents corresponding to a buffered signal, a plurality of current mirror unit respectively connected to the plurality of buffers, a plurality of filter circuits generating a first filter signal and a second filter signal by removing common noise included in a first output signal output from an nth current mirror unit of the plurality of current mirror units and a second output signal output from an (n−1)th current mirror unit of the plurality of current mirror units, and a plurality of integrators respectively connected to the plurality of filter circuits.
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公开(公告)号：US10942606B2
公开(公告)日：2021-03-09
申请号：US16718658
申请日：2019-12-18
Applicant: SILICON WORKS CO., LTD.
Inventor： Hee Jin Lee , Jae Hwan Lee , Jeong Kwon Nam , Kyu Tae Lee , Hyun Soo Chung , Jin Yoon Jang , Hee Ra Yun , Kyung Min Shin , Mun Seok Kang
Abstract: A touch sensing device of a current driving type, which separately drives a parasitic capacitor by using an electric charge controller, includes a parasitic capacitance charger connected to a touch sensing line to charge a parasitic capacitor of a touch electrode connected to the touch sensing line with a predetermined charging current during a charging period and a sensing unit connected to the touch sensing line during a first driving period to drive a capacitor of the touch electrode with a first driving current corresponding to a difference voltage between a first voltage, charged into the parasitic capacitor when a touch does not occur, and a second voltage charged into the parasitic capacitor when a touch occurs and to sense a first touch voltage of the capacitor based on the first driving current during a first sensing period.
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