Patents by Inventor Namkyun Cho
Namkyun Cho 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: 11175766Abstract: Disclosed is a display apparatus capable of sensing a pen touch without malfunction even when a user's hand or palm touches the display apparatus. The display apparatus includes a touch driving circuit dividing a plurality of touch electrodes arranged in a display panel into a plurality of touch groups, supplying a common voltage to the plurality of touch electrodes at each of a plurality of display periods, and sensing a position of a touch pen through some of the plurality of touch electrodes at each of a plurality of pen sensing periods, wherein the touch driving circuit supplies an uplink signal to some of the plurality of touch groups at each of at least one pen position sensing period among the plurality of pen sensing periods and senses a downlink signal transmitted from the touch pen through the touch groups to which the uplink signal has been supplied to generate pen touch raw data.Type: GrantFiled: December 6, 2018Date of Patent: November 16, 2021Assignee: LG Display Co., Ltd.Inventors: ChangHwan Seo, NamKyun Cho, SeungChul Park, Eunji Seo
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Publication number: 20190179475Abstract: Disclosed is a display apparatus capable of sensing a pen touch without malfunction even when a user's hand or palm touches the display apparatus. The display apparatus includes a touch driving circuit dividing a plurality of touch electrodes arranged in a display panel into a plurality of touch groups, supplying a common voltage to the plurality of touch electrodes at each of a plurality of display periods, and sensing a position of a touch pen through some of the plurality of touch electrodes at each of a plurality of pen sensing periods, wherein the touch driving circuit supplies an uplink signal to some of the plurality of touch groups at each of at least one pen position sensing period among the plurality of pen sensing periods and senses a downlink signal transmitted from the touch pen through the touch groups to which the uplink signal has been supplied to generate pen touch raw data.Type: ApplicationFiled: December 6, 2018Publication date: June 13, 2019Inventors: ChangHwan SEO, NamKyun CHO, SeungChul PARK, Eunji SEO
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Patent number: 9804700Abstract: A display device having a display panel and a touch screen panel is disclosed. The display device includes a display panel driving unit formed on a portion of the rear of the display panel and including a plurality of display panel driving circuits to drive the display panel; a touch screen panel driving unit formed on other portion of the rear of the display panel to be adjacent to the display panel driving unit and including a plurality of touch screen panel driving circuits to drive the touch screen panel; and a connector formed on the display panel driving unit and including a first connector unit connected to at least one of the display panel driving circuits and a second connector unit connected to at least one of the touch screen panel driving circuits.Type: GrantFiled: November 1, 2011Date of Patent: October 31, 2017Assignee: LG DISPLAY CO., LTD.Inventors: Namkyun Cho, Keuksang Kwon, Jaehyun Park
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Patent number: 9612646Abstract: A touch sensing display device supporting a pixel driving period and a touch driving period in each frame period. The device comprises a display panel having data lines and touch sensing lines, the data lines coupled to pixels of the display panel. A data driving circuit drives data signals onto the data lines during the pixel driving period of the frame period. A touch readout circuit generates touch data of signals of the touch sensing lines during the touch driving period of the frame period, the touch driving period distinct of the pixel driving period. A supply voltage of the data driving circuit can be cut off during the touch driving period, and a supply voltage of the touch readout circuit can be cut off during the pixel driving period.Type: GrantFiled: January 29, 2016Date of Patent: April 4, 2017Assignee: LG Display Co., Ltd.Inventors: Namkyun Cho, Keuksang Kwon
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Publication number: 20160147283Abstract: A touch sensing display device supporting a pixel driving period and a touch driving period in each frame period. The device comprises a display panel having data lines and touch sensing lines, the data lines coupled to pixels of the display panel. A data driving circuit drives data signals onto the data lines during the pixel driving period of the frame period. A touch readout circuit generates touch data of signals of the touch sensing lines during the touch driving period of the frame period, the touch driving period distinct of the pixel driving period. A supply voltage of the data driving circuit can be cut off during the touch driving period, and a supply voltage of the touch readout circuit can be cut off during the pixel driving period.Type: ApplicationFiled: January 29, 2016Publication date: May 26, 2016Inventors: Namkyun Cho, Keuksang Kwon
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Patent number: 9285912Abstract: A touch sensing display device supporting a pixel driving period and a touch driving period in each frame period. The device comprises a display panel having data lines and touch sensing lines, the data lines coupled to pixels of the display panel. A data driving circuit drives data signals onto the data lines during the pixel driving period of the frame period. A touch readout circuit generates touch data of signals of the touch sensing lines during the touch driving period of the frame period, the touch driving period distinct of the pixel driving period. A supply voltage of the data driving circuit can be cut off during the touch driving period, and a supply voltage of the touch readout circuit can be cut off during the pixel driving period.Type: GrantFiled: May 13, 2015Date of Patent: March 15, 2016Assignee: LG Display Co., Ltd.Inventors: Namkyun Cho, Keuksang Kwon
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Publication number: 20150346887Abstract: A touch sensing display device supporting a pixel driving period and a touch driving period in each frame period. The device comprises a display panel having data lines and touch sensing lines, the data lines coupled to pixels of the display panel. A data driving circuit drives data signals onto the data lines during the pixel driving period of the frame period. A touch readout circuit generates touch data of signals of the touch sensing lines during the touch driving period of the frame period, the touch driving period distinct of the pixel driving period. A supply voltage of the data driving circuit can be cut off during the touch driving period, and a supply voltage of the touch readout circuit can be cut off during the pixel driving period.Type: ApplicationFiled: May 13, 2015Publication date: December 3, 2015Inventors: Namkyun CHO, Keuksang KWON
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Patent number: 8970517Abstract: A display device having a touch screen panel includes a display panel includes a common electrode; a touch screen panel including a plurality of first conductive patterns that are formed on one surface of the display panel and arranged in a first direction, and a plurality of second conductive patterns that are electrically insulated from the plurality of first conductive patterns and arranged in a second direction to cross over the first conductive patterns; a power source circuitry to supply a first common voltage to the common electrode and to supply a pulse voltage to at least one of the plurality of first and second conductive patterns; and a common voltage feedback circuit to remove an induction voltage induced to the common electrode by the pulse voltage supplied to the at least one of the plurality of first and second conductive patterns.Type: GrantFiled: September 29, 2011Date of Patent: March 3, 2015Assignee: LG Display Co., Ltd.Inventors: Intak Hwang, Namkyun Cho
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Patent number: 8854293Abstract: The exemplary embodiment suggests an apparatus and a method for driving a light source of a backlight unit. The apparatus for driving the light source of the backlight unit comprises a plurality of LED columns; a power output terminal and feedback terminals connected to the LED columns; and an LED driver sequentially driving the LEDs according to sequentially delayed PWM signals. The LED driver decides an operable number of LED channel based on the signals input through the feedback terminals, and sequentially delays the PWM signals with the phase difference controlled by the number of LED channel.Type: GrantFiled: November 24, 2008Date of Patent: October 7, 2014Assignee: LG Display Co., Ltd.Inventors: Nakjin Seong, Wonyong Park, Sangsoo Han, Namkyun Cho, Kyuman Lee, Jaeseo Kim
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Publication number: 20120133599Abstract: A display device having a display panel and a touch screen panel is disclosed. The display device includes a display panel driving unit formed on a portion of the rear of the display panel and including a plurality of display panel driving circuits to drive the display panel; a touch screen panel driving unit formed on other portion of the rear of the display panel to be adjacent to the display panel driving unit and including a plurality of touch screen panel driving circuits to drive the touch screen panel; and a connector formed on the display panel driving unit and including a first connector unit connected to at least one of the display panel driving circuits and a second connector unit connected to at least one of the touch screen panel driving circuits.Type: ApplicationFiled: November 1, 2011Publication date: May 31, 2012Inventors: Namkyun CHO, Keuksang KWON, Jaehyun PARK
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Publication number: 20120081320Abstract: A display device having a touch screen panel includes a display panel includes a common electrode; a touch screen panel including a plurality of first conductive patterns that are formed on one surface of the display panel and arranged in a first direction, and a plurality of second conductive patterns that are electrically insulated from the plurality of first conductive patterns and arranged in a second direction to cross over the first conductive patterns; a power source circuitry to supply a first common voltage to the common electrode and to supply a pulse voltage to at least one of the plurality of first and second conductive patterns; and a common voltage feedback circuit to remove an induction voltage induced to the common electrode by the pulse voltage supplied to the at least one of the plurality of first and second conductive patterns.Type: ApplicationFiled: September 29, 2011Publication date: April 5, 2012Inventors: Intak HWANG, Namkyun Cho
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Publication number: 20100001944Abstract: The exemplary embodiment suggests an apparatus and a method for driving a light source of a backlight unit. The apparatus for driving the light source of the backlight unit comprises a plurality of LED columns; a power output terminal and feedback terminals connected to the LED columns; and an LED driver sequentially driving the LEDs according to sequentially delayed PWM signals. The LED driver decides an operable number of LED channel based on the signals input through the feedback terminals, and sequentially delays the PWM signals with the phase difference controlled by the number of LED channel.Type: ApplicationFiled: November 24, 2008Publication date: January 7, 2010Applicant: LG DISPLAY CO., LTD.Inventors: Nakjin Seong, Wonyong Park, Sangsoo Han, Namkyun Cho, Kyuman Lee, Jaeseo Kim