Patents by Inventor Hak-Sun Chang
Hak-Sun Chang 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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Publication number: 20200301216Abstract: A liquid crystal display device includes a substrate, and a pixel electrode disposed on the substrate, the pixel electrode including a first stem portion that extends in a first direction, a second stem portion that extends in a second direction crossing the first direction and intersecting with the first stem portion, a plurality of branch portions, the branch portions extending to the first direction and the second direction from the first stem portion or the second stem portion, a first connection portion that connects distal ends of some of the branch electrodes to each other, extends in the first direction and intersects with the second stem portion, and a first edge electrode that is connected to one distal end of the second stem portion and extends in the first direction.Type: ApplicationFiled: June 11, 2020Publication date: September 24, 2020Applicant: Samsung Display Co. Ltd.Inventors: Se Hyun LEE, Hak Sun CHANG, Cheol SHIN
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Patent number: 10782564Abstract: A liquid crystal display includes a lower panel electrode including a lower panel unit electrode, an upper panel electrode including an upper panel unit electrode facing the lower panel unit electrode, and a liquid crystal layer between the lower panel electrode and the upper panel electrode and including liquid crystal molecules, where the lower panel unit electrode includes a center electrode disposed at a center thereof, minute branches which extends from an edge side of the center electrode to an outside, and a first cutout is defined in the center of the center electrode, and the a second cutout is defined in the upper panel unit electrode between the minute branches and the first cutout, and a third cutout is connected to the second cutout and defines a boundary between subregions together with the first cutout.Type: GrantFiled: May 20, 2015Date of Patent: September 22, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hak Sun Chang, Cheol Shin, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
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Patent number: 10712621Abstract: A liquid crystal display device includes a substrate, and a pixel electrode disposed on the substrate, the pixel electrode including a first stem electrode that extends in a first direction, a second stem electrode that extends in a second direction perpendicular to the first direction and intersects with the first stem electrode, a plurality of branch electrodes, the branch electrodes extending obliquely to the first direction and the second direction from the first stem electrode and the second stem electrode, a first connection electrode that connects distal ends of some of the branch electrodes to each other, extends in the first direction and intersects with the second stem electrode, and a first edge electrode that is connected to one distal end of the second stem electrode and extends in the first direction.Type: GrantFiled: February 6, 2019Date of Patent: July 14, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Se Hyun Lee, Hak Sun Chang, Cheol Shin
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Publication number: 20200124926Abstract: A liquid crystal display including a partial plate electrode along with a minute pattern in a pixel electrode thereby increasing the viewing angle and the lateral visibility of the liquid crystal display, as well as the response speed A step provider is provided to reinforce the control force of the liquid crystal molecules, thereby reducing the texture generated in the center of the pixel.Type: ApplicationFiled: December 19, 2019Publication date: April 23, 2020Inventors: Hak Sun Chang, Eun-Kil Park, Hyun-Ho Kang, Jang Wi Ryu, Seung-Suk Yang, Ki Chul Shin, Se Hyun Lee, Jae-Soo Jang, Hyo Ju Jung
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Publication number: 20200110318Abstract: A display device includes a substrate, a first wiring and a second wiring positioned on the substrate, a thin film transistor (“TFT”) connected to the first wiring and the second wiring, and a pixel electrode connected to the TFT and including a transverse branch part, a longitudinal branch part, minute branches extending from the transverse branch part and the longitudinal branch part, and an outer branch part connecting end parts of the minute branches and adjacent to the storage electrode line, where a shortest distance from a center part of at least one side of the outer branch part to at least one side of the first wiring is different from a shortest distance from an edge part of at least one side of the outer branch part to at least one side of the first wiring.Type: ApplicationFiled: December 5, 2019Publication date: April 9, 2020Inventors: Cheol SHIN, Hak Sun CHANG, Se Hyun LEE, Seung Min LEE
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Publication number: 20200089063Abstract: A liquid crystal display, including a first substrate; a gate line and a data line disposed on the first substrate; and a pixel electrode connected to the gate line and the data line and comprising a first sub pixel electrode and a second sub pixel electrode disposed on the first substrate. Each of the first sub pixel electrode and the second sub pixel electrode includes a transverse stem; a longitudinal stem; and a plurality of minute branches extending from transverse stem and the longitudinal stem. A width of the first sub pixel electrode is different from a width of the second sub pixel electrode.Type: ApplicationFiled: November 21, 2019Publication date: March 19, 2020Inventors: Hak Sun CHANG, Jang Wi RYU, Ki Chul SHIN, Jae-Soo JANG
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Patent number: 10551691Abstract: A liquid crystal display including a partial plate electrode along with a minute pattern in a pixel electrode thereby increasing the viewing angle and the lateral visibility of the liquid crystal display, as well as the response speed A step provider is provided to reinforce the control force of the liquid crystal molecules, thereby reducing the texture generated in the center of the pixel.Type: GrantFiled: May 10, 2019Date of Patent: February 4, 2020Assignee: Samsung Display Co., Ltd.Inventors: Hak Sun Chang, Eun-Kil Park, Hyun-Ho Kang, Jang Wi Ryu, Seung-Suk Yang, Ki Chul Shin, Se Hyun Lee, Jae-Soo Jang, Hyo Ju Jung
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Patent number: 10551689Abstract: A display device includes a substrate, a first wiring and a second wiring positioned on the substrate, a thin film transistor (“TFT”) connected to the first wiring and the second wiring, and a pixel electrode connected to the TFT and including a transverse branch part, a longitudinal branch part, minute branches extending from the transverse branch part and the longitudinal branch part, and an outer branch part connecting end parts of the minute branches and adjacent to the storage electrode line, where a shortest distance from a center part of at least one side of the outer branch part to at least one side of the first wiring is different from a shortest distance from an edge part of at least one side of the outer branch part to at least one side of the first wiring.Type: GrantFiled: January 12, 2018Date of Patent: February 4, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Cheol Shin, Hak Sun Chang, Se Hyun Lee, Seung Min Lee
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Patent number: 10527892Abstract: A liquid crystal display device includes a base unit, a gate line disposed on the base unit, a data line disposed on the base unit and crossing the gate line while being insulated from the gate line, a shielding electrode disposed on the data line and overlapping the data line and isolated from the pixel electrode and a conductive bar, the conductive bar disposed on the same layer as that on which the shielding electrode is disposed, isolated from the shielding electrode, and extending in parallel to the data line.Type: GrantFiled: September 17, 2018Date of Patent: January 7, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hak Sun Chang, Cheol Shin, Ki Chul Shin, Se Hyun Lee, Yun Seok Lee
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Patent number: 10520781Abstract: The present invention relates to a liquid crystal display including: a lower electrode including a unit pixel electrode; an upper electrode including an upper unit electrode facing the unit pixel electrode; and a liquid crystal layer between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned approximately perpendicular to the surfaces of the lower electrode and the upper electrode in the absence of an electric field, wherein the unit pixel electrode includes a stem forming a boundary between a plurality of sub-regions and a plurality of minute branches extending in different directions in two different sub-regions, the upper unit electrode includes an opening facing the stem and extending parallel to the stem, any alignment aid to pretilt the liquid crystal molecules is absent, and a length of the minute branches is equal to or less than about 53 ?m.Type: GrantFiled: April 3, 2019Date of Patent: December 31, 2019Assignee: Samsung Display Co., Ltd.Inventors: Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin, Jae-Soo Jang, Ka Eun Kim, Ho Kil Oh, Se Hyun Lee, Hyo Ju Jung, Sang Hyeon Song, Sang Jin Jeon
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Patent number: 10520777Abstract: A liquid crystal display, including a first substrate; a gate line and a data line disposed on the first substrate; and a pixel electrode connected to the gate line and the data line and comprising a first sub pixel electrode and a second sub pixel electrode disposed on the first substrate. Each of the first sub pixel electrode and the second sub pixel electrode includes a transverse stem; a longitudinal stem; and a plurality of minute branches extending from transverse stem and the longitudinal stem. A width of the first sub pixel electrode is different from a width of the second sub pixel electrode.Type: GrantFiled: May 11, 2017Date of Patent: December 31, 2019Assignee: Samsung Display Co., Ltd.Inventors: Hak Sun Chang, Jang Wi Ryu, Ki Chul Shin, Jae-Soo Jang
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Publication number: 20190296048Abstract: A display device including a gate line, first and second data lines adjacent to each other in a first direction and crossing the gate line, a first transistor electrically connected to the gate line and the first data line, and a first pixel electrode electrically connected to the first transistor, in which the first pixel electrode includes a first sub-electrode and a second sub-electrode adjacent to each other in the first direction, the first sub-electrode includes a first longitudinal stem extending in a direction substantially parallel to the first data line and overlapping the first data line and a plurality of first branches connected to the first longitudinal stem, and the second sub-electrode includes a second longitudinal stem extending in a direction substantially parallel to the second data line and overlapping the second data line and a plurality of second branches connected to the second longitudinal stem.Type: ApplicationFiled: September 20, 2018Publication date: September 26, 2019Inventors: Se Hyun LEE, Hak Sun CHANG, Byoung Sun NA, Seung Min LEE
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Patent number: 10423043Abstract: The present invention relates to a liquid crystal display including: a lower electrode including a unit pixel electrode; an upper electrode including an upper unit electrode facing the unit pixel electrode; and a liquid crystal layer between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned approximately perpendicular to the surfaces of the lower electrode and the upper electrode in the absence of an electric field, wherein the unit pixel electrode includes a stem forming a boundary between a plurality of sub-regions and a plurality of minute branches extending in different directions in two different sub-regions, the upper unit electrode includes an opening facing the stem and extending parallel to the stem, any alignment aid to pretilt the liquid crystal molecules is absent, and a length of the minute branches is equal to or less than about 53 ?m.Type: GrantFiled: September 20, 2016Date of Patent: September 24, 2019Assignee: Samsung Display Co., Ltd.Inventors: Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin, Jae-Soo Jang, Ka Eun Kim, Ho Kil Oh, Se Hyun Lee, Hyo Ju Jung, Sang Hyeon Song, Sang Jin Jeon
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Publication number: 20190265559Abstract: A liquid crystal display including a partial plate electrode along with a minute pattern in a pixel electrode thereby increasing the viewing angle and the lateral visibility of the liquid crystal display, as well as the response speed A step provider is provided to reinforce the control force of the liquid crystal molecules, thereby reducing the texture generated in the center of the pixel.Type: ApplicationFiled: May 10, 2019Publication date: August 29, 2019Inventors: Hak Sun CHANG, Eun-Kil PARK, Hyun-Ho KANG, Jang Wi RYU, Seung-Suk YANG, Ki Chul SHIN, Se Hyun LEE, Jae-Soo JANG, Hyo Ju JUNG
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Publication number: 20190250468Abstract: A liquid crystal display device includes a first substrate; a first pixel electrode disposed on the first substrate and including a first body portion, a first sub-edge portion on a first side of the first body portion, and a second sub-edge portion, which on a second side of the first body portion; and a shield electrode on the same layer as the first pixel electrode a shield electrode on the same layer as the first pixel electrode and extending from a first side of the first sub-edge portion in a first direction. The first body portion includes a first stem portion, a second stem portion that intersects the first stem portion, and a plurality of branch portions extending from at least one of the first stem portion and the second stem portion. The first sub-edge portion is spaced apart from the branch portions and has a bent portion.Type: ApplicationFiled: April 24, 2019Publication date: August 15, 2019Inventors: Hak Sun CHANG, Cheol SHIN, Young Goo SONG, Seung Jun YU, Se Hyun LEE
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Publication number: 20190227355Abstract: The present invention relates to a liquid crystal display including: a lower electrode including a unit pixel electrode; an upper electrode including an upper unit electrode facing the unit pixel electrode; and a liquid crystal layer between the lower electrode and the upper electrode and including a plurality of liquid crystal molecules aligned approximately perpendicular to the surfaces of the lower electrode and the upper electrode in the absence of an electric field, wherein the unit pixel electrode includes a stem forming a boundary between a plurality of sub-regions and a plurality of minute branches extending in different directions in two different sub-regions, the upper unit electrode includes an opening facing the stem and extending parallel to the stem, any alignment aid to pretilt the liquid crystal molecules is absent, and a length of the minute branches is equal to or less than about 53 ?m.Type: ApplicationFiled: April 3, 2019Publication date: July 25, 2019Inventors: Jang Wi RYU, Cheol SHIN, Hak Sun CHANG, Ki Chul SHIN, Jae-Soo JANG, Ka Eun KIM, Ho Kil OH, Se Hyun LEE, Hyo Ju JUNG, Sang Hyeon SONG, Sang Jin JEON
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Patent number: 10345655Abstract: A liquid crystal display including a partial plate electrode along with a minute pattern in pixel electrode thereby increasing the viewing angle and the lateral visibility of the liquid crystal display, as well as the response speed A step provider is provided to reinforce the control force of the liquid crystal molecules, thereby reducing the texture generated in the center of the pixel.Type: GrantFiled: February 23, 2016Date of Patent: July 9, 2019Assignee: Samsung Display Co., Ltd.Inventors: Hak Sun Chang, Eun-Kil Park, Hyun-Ho Kang, Jang Wi Ryu, Seung-Suk Yang, Ki Chul Shin, Se Hyun Lee, Jae-Soo Jang, Hyo Ju Jung
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Publication number: 20190171070Abstract: A liquid crystal display device includes a substrate, and a pixel electrode disposed on the substrate, the pixel electrode including a first stem electrode that extends in a first direction, a second stem electrode that extends in a second direction perpendicular to the first direction and intersects with the first stem electrode, a plurality of branch electrodes, the branch electrodes extending obliquely to the first direction and the second direction from the first stem electrode and the second stem electrode, a first connection electrode that connects distal ends of some of the branch electrodes to each other, extends in the first direction and intersects with the second stem electrode, and a first edge electrode that is connected to one distal end of the second stem electrode and extends in the first direction.Type: ApplicationFiled: February 6, 2019Publication date: June 6, 2019Inventors: Se Hyun LEE, Hak Sun CHANG, Cheol SHIN
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Patent number: 10303008Abstract: A display device includes a base substrate; a pixel electrode on the base substrate; a first conductive bar which is adjacent to and separated from a first edge of the pixel electrode in a top plan view, the first conductive bar disposed in a same layer as the pixel electrode; and a common electrode which overlaps the pixel electrode. In the top plan view, the first conductive bar includes: a first body which lengthwise extends along the first edge of the pixel electrode and includes an edge which faces the first edge of the pixel electrode, and a first ridge pattern and a second ridge pattern each protruding from the edge of the first body and toward the pixel electrode, the first and second ridge patterns consecutively disposed along a lengthwise direction of the first body.Type: GrantFiled: January 18, 2017Date of Patent: May 28, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Cheol Shin, Hak Sun Chang, Chang Il Tae
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Patent number: 10295866Abstract: A liquid crystal display device includes a first substrate; a first pixel electrode disposed on the first substrate and including a first body portion, a first sub-edge portion on a first side of the first body portion, and a second sub-edge portion, which on a second side of the first body portion; and a shield electrode on the same layer as the first pixel electrode a shield electrode on the same layer as the first pixel electrode and extending from a first side of the first sub-edge portion in a first direction. The first body portion includes a first stem portion, a second stem portion that intersects the first stem portion, and a plurality of branch portions extending from at least one of the first stem portion and the second stem portion. The first sub-edge portion is spaced apart from the branch portions and has a bent portion.Type: GrantFiled: January 19, 2017Date of Patent: May 21, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hak Sun Chang, Cheol Shin, Young Goo Song, Seung Jun Yu, Se Hyun Lee