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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Patent number: 10274792Abstract: A liquid-crystal display device includes a substrate, a thin-film transistor (“TFT”) disposed on the substrate, an insulation film disposed on the TFT, a pixel electrode disposed on the insulation film, an expanded electrode disposed in a same layer as the pixel electrode, a connection electrode which is disposed in the same layer as the pixel electrode and connects the pixel electrode with the expanded electrode, and a shield electrode disposed in the same layer as the pixel electrode and separated from the pixel electrode, the connection electrode and the expanded electrode, where the expanded electrode is electrically connected to the TFT via a contact hole defined in the insulation film, and where the shield electrode includes a first shield portion disposed between the pixel electrode and the contact hole in a plan view, and a second shield portion other than the first shield portion.Type: GrantFiled: May 5, 2017Date of Patent: April 30, 2019Assignee: SAMSUNG DISPLAY CO. LTD.Inventors: Cheol Shin, Hak Sun Chang, Jin Ah Kim, Se Hyun Lee, Seung Min Lee, Jung Wook Lee
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Patent number: 10261379Abstract: 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: April 16, 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: 10222659Abstract: A liquid crystal display includes a substrate, and a pixel electrode disposed on the substrate. The pixel electrode includes a plurality of micro-branches which are spaced apart from each other and extend side by side with each other, where a micro-slit is defined between the micro-branches, and a stem part which is connected to each of the micro-branches, where an indentation pattern is defined by a cutout portion extending into the stem part, and at least one of two points connecting the indentation pattern and the micro-slit is located on a slit boundary line at which the micro-slit and the stem part meet each other.Type: GrantFiled: June 9, 2016Date of Patent: March 5, 2019Assignee: SAMSUNG DISPLAY CO. LTD.Inventors: Se Hyun Lee, Cheol Shin, Hak Sun Chang
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Patent number: 10203567Abstract: 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: November 15, 2016Date of Patent: February 12, 2019Assignee: Samsung Display Co., Ltd.Inventors: Se Hyun Lee, Hak Sun Chang, Cheol Shin
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Publication number: 20190018292Abstract: 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: ApplicationFiled: September 17, 2018Publication date: January 17, 2019Inventors: Hak Sun CHANG, Cheol SHIN, Ki Chul SHIN, Se Hyun LEE, Yun Seok LEE
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Publication number: 20190004379Abstract: 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: January 12, 2018Publication date: January 3, 2019Inventors: Cheol SHIN, Hak Sun CHANG, Se Hyun LEE, Seung Min LEE
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Patent number: 10168585Abstract: A liquid crystal display includes: a lower panel electrode including a lower panel unit electrodes; an upper panel electrode including an upper panel unit electrodes facing the lower panel unit electrodes; and a liquid crystal layer disposed between the lower panel electrode and the upper panel electrode, in which the lower panel unit electrode includes a stem portion which defines a boundary between a plurality of sub-regions therein, a center pattern disposed at a center of the stem portion and in which overlaps the sub-regions, and a plurality of micro branch portions which extends from the center pattern, where extending directions of the micro branch portions in different regions are different from each other, and an end portion of the micro branch portions is extended in a direction different from an extending direction thereof.Type: GrantFiled: September 6, 2016Date of Patent: January 1, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jang Wi Ryu, Cheol Shin, Hak Sun Chang, Ki Chul Shin, Ho Kil Oh
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Patent number: 10108054Abstract: 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: January 25, 2017Date of Patent: October 23, 2018Assignee: 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: 10031379Abstract: A liquid crystal display device includes: a first substrate; a pixel electrode formed on the first substrate; a second substrate corresponding to the first substrate; and a common electrode formed on the second substrate. The pixel electrode includes: a central electrode, an outer portion connected to the central electrode and extending along an edge of the pixel electrode; and a fine branch portion extending from a side of the central electrode and spaced apart from the outer portion, wherein a cross-shaped opening is formed in the common electrode.Type: GrantFiled: December 31, 2015Date of Patent: July 24, 2018Assignee: Samsung Display Co., Ltd.Inventors: Se Hyun Lee, Cheol Shin, Hak Sun Chang, Ka Eun Kim, Ki Chul Shin
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Patent number: 9971209Abstract: A liquid crystal display includes a first substrate, a gate line the first substrate, an insulating layer the gate line, and pixel electrodes the insulating layer, where the pixel electrodes include a first pixel electrode, a second pixel electrode, and a third pixel electrode neighboring to each other, each of the first pixel electrode, the second pixel electrode, and the third pixel electrode includes a vertical stem part, a horizontal stem part, and fine branch parts extended from each horizontal stem part and each vertical stem part to both opposite sides in a diagonal direction, the fine branch parts of the first pixel electrode are alternately branched to the both opposite sides of the horizontal stem part and the vertical stem part, and the second pixel electrode and the third pixel electrode include an outer side part enclosing an edge of each pixel electrode.Type: GrantFiled: March 18, 2016Date of Patent: May 15, 2018Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Cheol Shin, Hak Sun Chang, Ki Chul Shin
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Patent number: 9958739Abstract: A liquid crystal display includes an insulation substrate, a plurality of pixels disposed on the insulation substrate, where each pixel has a shape elongated in a horizontal direction, and includes a thin film transistor formation region and a display area; and a reference voltage line extending in a vertical direction along a center of the display area, where the display area includes a single high-gray subpixel area and two low-gray subpixel areas, and the single high-gray subpixel area is positioned between the two low-gray subpixel areas.Type: GrantFiled: January 24, 2017Date of Patent: May 1, 2018Assignee: Samsung Display Co., Ltd.Inventors: Cheol Shin, Hak Sun Chang, Jang Wi Ryu, Jae-Soo Jang, Ki Chul Shin, Seong Young Lee
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Patent number: 9939691Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes: a first substrate; a gate line formed on the first substrate; an insulating layer formed on the gate line; and a first subpixel electrode and a second subpixel electrode that are formed on the insulating layer. Each of the first subpixel electrode and the second, subpixel electrode includes a first subregion and a second subregion. At least one of the first subregion and the second subregion includes a vertical stem, a horizontal stem extending from a middle of the vertical stem, and a plurality of minute branches laterally extending in a diagonal direction from the horizontal stem. The plurality of minute branches laterally extending from the horizontal stem are alternately branched with reference to the horizontal stem.Type: GrantFiled: October 13, 2015Date of Patent: April 10, 2018Assignee: Samsung Display Co., Ltd.Inventors: Cheol Shin, Hak Sun Chang, Ka Eun Kim, Se Hyun Lee, Ki Chul Shin
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Patent number: 9857641Abstract: A liquid crystal display (“LCD”) includes: a substrate on which a pixel region is defined; and a pixel electrode which is disposed in the pixel region on the substrate. The pixel electrode includes: a plurality of unit pixel electrodes which are arranged substantially in a matrix form; and a connecting electrode which connects the unit pixel electrodes to each other. Neighboring unit pixel electrodes adjacent to each other in a column direction are separated from each other by a first in-between area extending along a row direction, neighboring unit pixel electrodes adjacent to each other in the row direction are separated from each other by a second in-between area extending along the column direction, and the connecting electrode is disposed in a region in which corners of the unit pixel electrodes face each other.Type: GrantFiled: June 15, 2016Date of Patent: January 2, 2018Assignee: SAMSUNG DISPLAY CO. LTD.Inventors: Cheol Shin, Hak Sun Chang, Ki Chul Shin, Se Hyun Lee
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Publication number: 20170363917Abstract: A liquid-crystal display device includes a substrate, a thin-film transistor (“TFT”) disposed on the substrate, an insulation film disposed on the TFT, a pixel electrode disposed on the insulation film, an expanded electrode disposed in a same layer as the pixel electrode, a connection electrode which is disposed in the same layer as the pixel electrode and connects the pixel electrode with the expanded electrode, and a shield electrode disposed in the same layer as the pixel electrode and separated from the pixel electrode, the connection electrode and the expanded electrode, where the expanded electrode is electrically connected to the TFT via a contact hole defined in the insulation film, and where the shield electrode includes a first shield portion disposed between the pixel electrode and the contact hole in a plan view, and a second shield portion other than the first shield portion.Type: ApplicationFiled: May 5, 2017Publication date: December 21, 2017Inventors: Cheol SHIN, Hak Sun CHANG, Jin Ah KIM, Se Hyun LEE, Seung Min LEE, Jung Wook LEE
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Patent number: 9846331Abstract: A liquid crystal display includes a first panel including a first electrode, which includes side electrodes in edge areas of a pixel, a central electrode connected to the side electrodes and disposed in a central area of the pixel, and fine branches, some of which are connected to the side electrode, a second panel in which a cutout, which corresponds to the first electrode and divides the fine branches, the central electrode and the side electrode into domains is defined, and which includes a second electrode, which is separated by the cutout and corresponds to each of the domains, where second slit patterns, which are provided by partially cutting out ends of the fine branches, separate the side electrodes and the fine branches from each other, and extend in parallel to a longitudinal direction of the side electrodes are defined in the first panel.Type: GrantFiled: May 25, 2016Date of Patent: December 19, 2017Assignee: SAMSUNG DISPLAY CO. LTD.Inventors: Se Hyun Lee, Cheol Shin, Hak Sun Chang, Ki Chul Shin
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Publication number: 20170357129Abstract: 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: January 19, 2017Publication date: December 14, 2017Inventors: Hak Sun CHANG, Cheol SHIN, Young Goo SONG, Seung Jun YU, Se Hyun LEE
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Patent number: 9817272Abstract: A display device may include a liquid crystal layer and a pixel electrode that overlaps the liquid crystal layer. The pixel electrode may include a first bar, a second bar, a third bar, and a plurality of first-type branches. The second bar may be directly connected to a first end of the first bar. The third bar may be directly connected to a first end of the second bar or directly connected to a second end of the first bar. The first-type branches may be slanted with respected to the first bar and may be positioned between the third bar and at least one of the first bar and the second bar.Type: GrantFiled: November 4, 2015Date of Patent: November 14, 2017Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Se Hyun Lee, Hak Sun Chang, Cheol Shin
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Patent number: 9817286Abstract: A liquid crystal display device includes: a first substrate; a shielding electrode disposed on the first substrate and which extends in a first direction; a pixel electrode disposed on a same layer as the shielding electrode and insulated from the shielding electrode; a common electrode which overlaps the shielding electrode and the pixel electrode in a thickness direction of the first substrate; and a liquid crystal layer interposed between the common electrode and the pixel and shielding electrodes. The liquid crystal layer includes a first liquid crystal molecule disposed in a first region between the shielding electrode and the pixel electrode, and the first liquid crystal molecule is pre-tilted to have an azimuthal angle in a range of about zero degree to about +45 degrees or in a range of about ?45 degrees to about zero degree, based on the first direction.Type: GrantFiled: November 18, 2016Date of Patent: November 14, 2017Assignee: SAMSUNG DISPLAY CO. LTD.Inventors: Cheol Shin, Hak Sun Chang, Se Hyun Lee
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Publication number: 20170322469Abstract: A liquid crystal display device includes: a first substrate; a shielding electrode disposed on the first substrate and which extends in a first direction; a pixel electrode disposed on a same layer as the shielding electrode and insulated from the shielding electrode; a common electrode which overlaps the shielding electrode and the pixel electrode in a thickness direction of the first substrate; and a liquid crystal layer interposed between the common electrode and the pixel and shielding electrodes. The liquid crystal layer includes a first liquid crystal molecule disposed in a first region between the shielding electrode and the pixel electrode, and the first liquid crystal molecule is pre-tilted to have an azimuthal angle in a range of about zero degree to about +45 degrees or in a range of about ?45 degrees to about zero degree, based on the first direction.Type: ApplicationFiled: November 18, 2016Publication date: November 9, 2017Inventors: Cheol SHIN, Hak Sun CHANG, Se Hyun LEE
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Publication number: 20170322462Abstract: 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: November 15, 2016Publication date: November 9, 2017Inventors: Se Hyun LEE, Hak Sun CHANG, Cheol SHIN