Patents by Inventor Mun-Seok Kang
Mun-Seok Kang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11797128Abstract: 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.Type: GrantFiled: May 6, 2022Date of Patent: October 24, 2023Assignee: LX SEMICON CO., LTD.Inventors: Kyu Tae Lee, Mun Seok Kang, Jae Hwan Lee, Jeong Kwon Nam, Hyun Soo Chung, Jin Yoon Jang, Hee Ra Yun
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Patent number: 11768558Abstract: 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.Type: GrantFiled: December 15, 2021Date of Patent: September 26, 2023Assignee: LX SEMICON CO., LTD.Inventors: Kyu Tae Lee, Mun Seok Kang, Jae Hwan Lee, Jeong Kwon Nam, Hyun Soo Chung, Jin Yoon Jang, Hee Ra Yun, Yeon Ju Yu
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Patent number: 11586323Abstract: 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.Type: GrantFiled: December 15, 2021Date of Patent: February 21, 2023Assignee: LX Semicon Co., Ltd.Inventors: Jae Hwan Lee, Mun Seok Kang, Jeong Kwon Nam, Kyu Tae Lee, Hyun Soo Chung, Jin Yoon Jang, Hee Ra Yun, Yeon Ju Yu
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Publication number: 20220365654Abstract: 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.Type: ApplicationFiled: May 6, 2022Publication date: November 17, 2022Applicant: LX Semicon Co., Ltd.Inventors: Kyu Tae LEE, Mun Seok KANG, Jae Hwan LEE, Jeong Kwon NAM, Hyun Soo CHUNG, Jin Yoon JANG, Hee Ra YUN
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Patent number: 11487391Abstract: The present disclosure provides a touch sensing device reducing the touch driving time and the signal to noise ratio (SNR) by a multi-driving using driving signals that can be distinguished from each other by their frequencies and codes.Type: GrantFiled: December 18, 2020Date of Patent: November 1, 2022Assignee: SILICON WORKS CO., LTD.Inventors: Mohamed Gamal Ahmed Mohamed, Jun Seop Lee, Mun Seok Kang
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Publication number: 20220197473Abstract: 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.Type: ApplicationFiled: December 15, 2021Publication date: June 23, 2022Inventors: Jae Hwan Lee, Mun Seok Kang, Jeong Kwon Nam, Kyu Tae Lee, Hyun Soo Chung, Jin Yoon Jang, Hee Ra Yun, Yeon Ju Yu
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Publication number: 20220197468Abstract: 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.Type: ApplicationFiled: December 15, 2021Publication date: June 23, 2022Inventors: Kyu Tae Lee, Mun Seok Kang, Jae Hwan Lee, Jeong Kwon Nam, Hyun Soo Chung, Jin Yoon Jang, Hee Ra Yun, Yeon Ju Yu
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Patent number: 11294509Abstract: Multi-driving in touch sensing allows for reduced errors of the touch sensing by grouping touch electrodes according to sizes of their coupling capacitances and multi-driving them by group.Type: GrantFiled: April 30, 2020Date of Patent: April 5, 2022Assignee: SILICON WORKS CO., LTD.Inventors: Mohamed Gamal Ahmed Mohamed, Mun Seok Kang
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Patent number: 11294524Abstract: 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.Type: GrantFiled: December 15, 2020Date of Patent: April 5, 2022Assignee: SILICON WORKS CO., LTDInventors: 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
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Publication number: 20210200349Abstract: The present disclosure provides a touch sensing device reducing the touch driving time and the signal to noise ratio (SNR) by a multi-driving using driving signals that can be distinguished from each other by their frequencies and codes.Type: ApplicationFiled: December 18, 2020Publication date: July 1, 2021Inventors: Mohamed Gamal Ahmed MOHAMED, Jun Seop LEE, Mun Seok KANG
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Publication number: 20210191571Abstract: 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.Type: ApplicationFiled: December 15, 2020Publication date: June 24, 2021Inventors: 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
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Patent number: 11029777Abstract: 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.Type: GrantFiled: December 18, 2019Date of Patent: June 8, 2021Assignee: SILICON WORKS CO., LTD.Inventors: 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
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Patent number: 11003283Abstract: An embodiment provides a touch sensing device configured to divide one driving cycle into two parts and to summate or subtract touch sensing data regarding respective parts, thereby removing periodic noise.Type: GrantFiled: December 17, 2019Date of Patent: May 11, 2021Assignee: SILICON WORKS CO., LTD.Inventors: Mohamed Gamal Ahmed Mohamed, Mun Seok Kang, Hee Jin Lee, Jun Seop Lee, Kyung Min Shin
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Patent number: 10942606Abstract: 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.Type: GrantFiled: December 18, 2019Date of Patent: March 9, 2021Assignee: SILICON WORKS CO., LTD.Inventors: 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
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Patent number: 10942604Abstract: 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.Type: GrantFiled: December 18, 2019Date of Patent: March 9, 2021Assignee: SILICON WORKS CO., LTD.Inventors: 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
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Publication number: 20200379623Abstract: Multi-driving in touch sensing allows for reduced errors of the touch sensing by grouping touch electrodes according to sizes of their coupling capacitances and multi-driving them by group.Type: ApplicationFiled: April 30, 2020Publication date: December 3, 2020Inventors: Mohamed Gamal Ahmed MOHAMED, Mun Seok KANG
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Publication number: 20200210020Abstract: 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.Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Inventors: 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
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Publication number: 20200210045Abstract: An embodiment provides a touch sensing device configured to divide one driving cycle into two parts and to summate or subtract touch sensing data regarding respective parts, thereby removing periodic noise.Type: ApplicationFiled: December 17, 2019Publication date: July 2, 2020Inventors: Mohamed Gamal Ahmed MOHAMED, Mun Seok KANG, Hee Jin LEE, Jun Seop LEE, Kyung Min SHIN
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Publication number: 20200210046Abstract: 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.Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Inventors: 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
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Publication number: 20200210008Abstract: 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.Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Inventors: 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