Patents by Inventor Gwang-Bum Ko
Gwang-Bum Ko 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: 11921946Abstract: A display device that senses externally applied pressure and a change in the resonant frequency of a piezoelectric element. The display device includes a piezoelectric sensor layer including a piezoelectric sensor; and a display panel disposed on the piezoelectric sensor layer. The piezoelectric sensor includes: a piezoelectric element having a first electrode, a second electrode facing the first electrode, and a piezoelectric material disposed between the first electrode and the second electrode; an alternating current (AC) voltage generator connected to the first electrode and applies a voltage having a resonance frequency to the piezoelectric element. A sensing circuit connected to the second electrode is configured to measure a change in impedance of the piezoelectric element.Type: GrantFiled: August 22, 2022Date of Patent: March 5, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Do Ik Kim, Gwang Bum Ko, Sung Hwan Kim
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Publication number: 20240053851Abstract: A display device includes a display panel including pixels. A display driver provides a data signal to the display panel. A sensor overlaps the display panel. A sensor driver transmits a driving signal to the sensor and receives sensing signals corresponding to the driving signal from the sensor. The display driver and the sensor driver share a signal line and are connected to a memory through the signal line. The display driver and the sensor driver are interconnected through a flag signal line. The sensor driver outputs a flag signal to the flag signal line to inform the display driver that the sensor driver desires to access the memory.Type: ApplicationFiled: August 11, 2023Publication date: February 15, 2024Inventors: Kang Won LEE, Gwang Bum KO, Kyung Youl MIN
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Patent number: 11775103Abstract: A display device includes a first sensing cell located in a display area; a first sensing line extending toward a non-display area from the first sensing cell; a second sensing cell most adjacent to the first sensing cell in a first direction in the display area; a second sensing line extending toward the non-display area from the second sensing cell; a multiplexer located in the non-display area, the multiplexer is connected to the first sensing line, the multiplexer is not connected to the second sensing line; a first pad connected to the multiplexer through a first multiplexer line; and a second pad connected to the second sensing line.Type: GrantFiled: February 3, 2021Date of Patent: October 3, 2023Assignee: Samsung Display Co., Ltd.Inventors: Gwang Bum Ko, Heon Seok Lee, Hyun Jae Lee, So Young Park
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Patent number: 11579725Abstract: An electronic device includes a first sensing electrode provided in an active region, in which a center is defined, the first sensing electrode including a plurality of first sensing patterns, each of which is spaced apart from the center by a first distance, a second sensing electrode including a plurality of second sensing patterns, each of which is spaced apart from the center by the first distance, a first sensing routing line electrically connected to the first sensing electrode, and a second sensing routing line electrically connected to one of the plurality of second sensing patterns. In the active region, a portion of the first sensing routing line and a portion of the second sensing routing line may have a rotational symmetry.Type: GrantFiled: October 28, 2021Date of Patent: February 14, 2023Assignee: Samsung Display Co., Ltd.Inventors: Gayoung Kim, Gwang-Bum Ko, Sanghyun Lim
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Publication number: 20220397974Abstract: A display device that senses externally applied pressure and a change in the resonant frequency of a piezoelectric element. The display device includes a piezoelectric sensor layer including a piezoelectric sensor; and a display panel disposed on the piezoelectric sensor layer. The piezoelectric sensor includes: a piezoelectric element having a first electrode, a second electrode facing the first electrode, and a piezoelectric material disposed between the first electrode and the second electrode; an alternating current (AC) voltage generator connected to the first electrode and applies a voltage having a resonance frequency to the piezoelectric element. A sensing circuit connected to the second electrode is configured to measure a change in impedance of the piezoelectric element.Type: ApplicationFiled: August 22, 2022Publication date: December 15, 2022Inventors: Do Ik KIM, Gwang Bum KO, Sung Hwan KIM
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Patent number: 11481053Abstract: A touch sensor includes a base layer and a plurality of first touch electrodes disposed on the base layer. The plurality of first touch electrodes are arranged in a first direction. The plurality of first touch electrodes include openings, and are electrically connected to one another. A plurality of second touch electrodes are disposed on the base layer. The plurality of second touch electrodes are arranged in a second direction. The plurality of second touch electrodes are electrically connected to one another. First pressure sensing electrodes and second pressure sensing electrodes are separated from each other and are disposed in the openings. The pressure sensing electrodes and second pressure sensing electrodes are spaced apart from the first touch electrodes. The first pressure sensing electrodes, the second pressure sensing electrodes, the first touch electrodes, and the second touch electrodes are all disposed in a first layer.Type: GrantFiled: March 25, 2019Date of Patent: October 25, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jung Hak Kim, Do Ik Kim, Gwang Bum Ko, Ga Young Kim, Young Sik Kim, Sang Chul Lee
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Patent number: 11429211Abstract: There is provided a display device including a high-sensitivity touch sensor. A display device includes: pixels arranged in a display region; sensing electrodes arranged in a sensing region; sensing lines coupled to the respective sensing electrodes; a noise detection electrode disposed on the same layer as the sensing electrodes; sensing channels each including a first input terminal coupled to any one of the sensing electrodes and a second input terminal coupled to the noise detection electrode, the sensing channels each generating an output signal corresponding to a voltage difference between the first and second input terminals; and a processor detecting a touch input, using the output signals of the sensing channels.Type: GrantFiled: September 9, 2020Date of Patent: August 30, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Do Ik Kim, Gwang Bum Ko, Jung Hak Kim, Sang Chul Lee, Ga Young Kim
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Patent number: 11402937Abstract: A touch sensor for a display device includes: a sensing area having a closed shape and including a plurality of sections, and a non-sensing area at least partially surrounding the sensing area; first touch electrodes disposed in the sensing area; and second touch electrodes disposed in the sensing area. The first touch electrodes include first groups of first sub-touch electrodes, and first sub-touch electrodes of at least some of the first groups are spaced at a first substantially equal distance from a center of the closed shape. The second touch electrodes include second groups of second sub-touch electrodes, and second sub-touch electrodes of at least some of the second groups are spaced at a second substantially equal distance from the center of the closed shape.Type: GrantFiled: December 27, 2020Date of Patent: August 2, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gwang Bum Ko, Sang Hyun Lim
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Patent number: 11379066Abstract: A touch sensor includes a base, first sensing electrode columns (FSECs), and second sensing electrode columns (SSECs). The base includes a sensing region (SR) including a rounded corner (RC), and a non-SR outside the SR. The FSECs extend in a direction on the base, each FSEC among the FSECs including first sensing electrodes (FSEs), each FSE among the FSEs including sub-electrodes. The SSECs are alternately disposed with the FSECs on the base, each SSEC among the SSECs including second sensing electrodes (SSEs). Sub-electrodes of one of adjacent FSEs among the FSEs are electrically connected to respective sub-electrodes of another of the adjacent FSEs. A sub-electrode closest to the RC among the sub-electrodes includes a rounded edge (RE) corresponding to the RC. A SSE closest to the RC among the SSEs includes a RE corresponding to the RC, and a protrusion part protruding toward the sub-electrode including the RE.Type: GrantFiled: March 1, 2021Date of Patent: July 5, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gwang Bum Ko, Soo Jung Lee, Jeong Yun Han
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Patent number: 11340723Abstract: A touch sensor includes sensing blocks. Each of the sensing blocks includes first sensing cells of a first group, first sensing cells of a second group, and second sensing cells. The first sensing cells of the first group are arranged in a first direction, spaced apart from each other with first separation areas therebetween, and coupled to an identical first electrical node. The first sensing cells of the second group are arranged in the first direction, spaced apart from each other with second separation areas therebetween, and coupled to an identical second electrical node. The second sensing cells respectively extend in a second direction in the first separation areas and the second separation areas. First sensing cells at borders of respective sensing blocks adjacent in the first direction are coupled to different electrical nodes.Type: GrantFiled: March 29, 2021Date of Patent: May 24, 2022Assignee: Samsung Display Co., Ltd.Inventor: Gwang Bum Ko
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Publication number: 20220137772Abstract: An electronic device includes a first sensing electrode provided in an active region, in which a center is defined, the first sensing electrode including a plurality of first sensing patterns, each of which is spaced apart from the center by a first distance, a second sensing electrode including a plurality of second sensing patterns, each of which is spaced apart from the center by the first distance, a first sensing routing line electrically connected to the first sensing electrode, and a second sensing routing line electrically connected to one of the plurality of second sensing patterns. In the active region, a portion of the first sensing routing line and a portion of the second sensing routing line may have a rotational symmetry.Type: ApplicationFiled: October 28, 2021Publication date: May 5, 2022Inventors: Gayoung KIM, Gwang-Bum KO, Sanghyun LIM
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Patent number: 11320944Abstract: A touch sensor includes: a sensing area including a first sensing area positioned in a center portion and a second sensing area positioned outwardly therefrom in an edge portion; first sensor electrodes disposed in the first sensing area; and second sensor electrodes disposed in the second sensing area, the second sensor electrodes being configured to be separately activated from the first sensor electrodes. The first sensor electrodes are drivable to detect a touch input generated in the first sensing area in a first mode and the second sensor electrodes are drivable to detect a touch input generated in the second sensing area in a second mode.Type: GrantFiled: September 24, 2020Date of Patent: May 3, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gwang Bum Ko, Ga Young Kim, Sang Hyun Lim
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Patent number: 11269448Abstract: A touch sensor includes a plurality of touch driving electrodes arranged in each of a plurality of touch driving columns in a column direction, and a plurality of touch sensing electrodes arranged in each of a plurality of touch sensing columns in the column direction, the plurality of touch driving columns and the plurality of touch sensing columns being alternately arranged in a row direction. In each of the plurality of touch driving columns, two or more odd-numbered touch driving electrodes among the plurality of touch driving electrodes are substantially simultaneously driven during a first touch group driving period. In each of the plurality of touch driving columns, two or more even-numbered touch driving electrodes among the plurality of touch driving electrodes are substantially simultaneously driven during a second touch group driving period that is different from the first touch group driving period.Type: GrantFiled: August 6, 2020Date of Patent: March 8, 2022Inventors: Yong Jin Jee, Gwang-Bum Ko, Sang Hun Park
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Patent number: 11269437Abstract: A display device includes a display member and a touch member. The display member is configured to generate an image. The display member includes a folding area configured to be folded along a folding axis, and another area adjacent to the folding area. The touch member is configured to detect a touch interaction association with the display member. The touch member includes a touch sensor, and a signal line electrically connected to the touch sensor. The touch sensor is a mesh-shaped touch sensor. A mesh line of the mesh-shaped touch sensor crosses the folding axis. A minimum angle between the folding axis and the mesh line is less than 90 degrees.Type: GrantFiled: January 25, 2021Date of Patent: March 8, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gwang-bum Ko, Hyunjae Na, Cheolkyu Kim, Sangkyu Choi, Jiwon Sohn, Soonsung Ahn
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Patent number: 11249588Abstract: A display apparatus includes an organic light emitting display panel including a circuit layer and a touch sensing unit disposed on the organic light emitting display panel and including sensor blocks and touch signal lines connected to the sensor blocks. The circuit layer includes first signal lines disposed on a base layer, a first insulation layer disposed on the first signal lines, second signal lines disposed on the first insulation layer, and dummy conductive patterns. Each of the touch signal lines includes a touch line part and a touch pad part connected to an end of the touch line part. The dummy conductive patterns include a dummy conductive pad disposed directly on a same layer as the first signal lines or the second signal lines and overlap the touch pad part.Type: GrantFiled: May 28, 2020Date of Patent: February 15, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyoungwook Jang, Gwang-bum Ko, Hyunjae Na
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Patent number: 11237668Abstract: A touch sensor includes a base layer, first touch sensor columns, second touch sensor columns, and sensing lines. The base layer includes a sensing region and a non-sensing region. The first touch sensor columns extend in a first direction. The first touch sensor columns include first touch electrodes. The first touch electrodes include sub-touch electrodes in the sensing region. The second touch sensor columns include second touch electrodes in the sensing region. The second touch sensor columns are alternately arranged with the first touch sensor columns. The sensing lines are in the non-sensing region. The sensing lines include: first sensing lines electrically connected to the sub-touch electrodes, and second sensing lines electrically connected to the second touch electrodes. The sub-touch electrodes and the second touch electrodes have different widths.Type: GrantFiled: March 16, 2020Date of Patent: February 1, 2022Assignee: Samsung Display Co., Ltd.Inventors: Soo Jung Lee, Hyoung Wook Jang, Gwang Bum Ko, Jeong Yun Han
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Patent number: 11231824Abstract: A touch panel including a sensing cell and a sensing line disposed on a transparent substrate. Each of the sensing cell and the sensing line includes at least one pattern line. The at least one pattern line includes unit patterns, each of the unit patterns including a first line extending in a first direction, a second line connected to the first line and extending in a second direction intersecting the first direction, a third line connected to the first line and extending in a third direction intersecting the first direction, and a fourth line connected to the third line and extending in the first direction. The first line, the second line, the third line, and an extension of the fourth line form a trapezoid. The unit patterns are repeatedly arranged and adjacent unit patterns are connected each other.Type: GrantFiled: April 6, 2020Date of Patent: January 25, 2022Assignee: Samsung Display Co., Ltd.Inventors: Gwang Bum Ko, Hyun Jae Na
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Publication number: 20210357056Abstract: A touch sensor for a display device includes: a sensing area having a closed shape and including a plurality of sections, and a non-sensing area at least partially surrounding the sensing area; first touch electrodes disposed in the sensing area; and second touch electrodes disposed in the sensing area. The first touch electrodes include first groups of first sub-touch electrodes, and first sub-touch electrodes of at least some of the first groups are spaced at a first substantially equal distance from a center of the closed shape. The second touch electrodes include second groups of second sub-touch electrodes, and second sub-touch electrodes of at least some of the second groups are spaced at a second substantially equal distance from the center of the closed shape.Type: ApplicationFiled: December 27, 2020Publication date: November 18, 2021Inventors: Gwang Bum KO, Sang Hyun Lim
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Publication number: 20210318779Abstract: A touch sensor includes: a sensing area including a first sensing area positioned in a center portion and a second sensing area positioned outwardly therefrom in an edge portion; first sensor electrodes disposed in the first sensing area; and second sensor electrodes disposed in the second sensing area, the second sensor electrodes being configured to be separately activated from the first sensor electrodes. The first sensor electrodes are drivable to detect a touch input generated in the first sensing area in a first mode and the second sensor electrodes are drivable to detect a touch input generated in the second sensing area in a second mode.Type: ApplicationFiled: September 24, 2020Publication date: October 14, 2021Inventors: Gwang Bum KO, Ga Young KIM, Sang Hyun LIM
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Publication number: 20210303122Abstract: A display device includes a first sensing cell located in a display area; a first sensing line extending toward a non-display area from the first sensing cell; a second sensing cell most adjacent to the first sensing cell in a first direction in the display area; a second sensing line extending toward the non-display area from the second sensing cell; a multiplexer located in the non-display area, the multiplexer is connected to the first sensing line, the multiplexer is not connected to the second sensing line; a first pad connected to the multiplexer through a first multiplexer line; and a second pad connected to the second sensing line.Type: ApplicationFiled: February 3, 2021Publication date: September 30, 2021Inventors: Gwang Bum KO, Heon Seok LEE, Hyun Jae LEE, So Young PARK