Patents by Inventor Jong-woong Chang
Jong-woong 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: 9601521Abstract: A liquid crystal display including a plurality of pixels that display an image, each pixel includes a thin film transistor that includes a gate electrode, a source electrode having a bar-shape and partially overlapping the gate electrode, and a drain electrode facing the source electrode at a location corresponding to the gate electrode, the drain electrode includes a first end portion having a C-shape that surrounds a distal end of the bar-shaped source electrode. This design eliminates an overlap between a data line and the gate electrode, which eliminates an overlap between the data line and the channel area of a semiconductor layer, which reduces a parasitic capacitor of the data line, resulting in less current to drive the data line, resulting in reduced power consumption of the display.Type: GrantFiled: September 4, 2015Date of Patent: March 21, 2017Assignee: Samsung Display Co., Ltd.Inventor: Jong Woong Chang
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Patent number: 9568790Abstract: A liquid crystal display includes: a first substrate; a gate line and a common voltage line that are on the first substrate; a gate insulating layer on the gate line and the common voltage line; a semiconductor layer on the gate insulating layer; a data line and a drain electrode that are on the semiconductor layer; a pixel electrode on the data line and the drain electrode; a passivation layer on the pixel electrode; a common electrode on the passivation layer; a second substrate; and a liquid crystal layer interposed between the first and second substrates. The pixel electrode contacts the drain electrode via a first contact hole, the common electrode contacts the common voltage line via a second contact hole in the gate insulating layer and the passivation layer, and the first and second contact holes are adjacently disposed in a thin film transistor forming region.Type: GrantFiled: September 3, 2014Date of Patent: February 14, 2017Assignee: Samsung Display Co., Ltd.Inventors: Yun Heo, Bong-Jun Lee, Dong Wuuk Seo, Jong Woong Chang
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Publication number: 20160342044Abstract: Provided is a liquid crystal display including a plurality of pixels disposed in a matrix of pixel rows and pixel columns, the liquid crystal display including: a plurality of gate lines formed on a first substrate and disposed two between every pixel row; a plurality of data lines formed on the first substrate and disposed one between every two adjacent pixel columns; a common voltage line formed on the first substrate and extending in a pixel row direction along a vertical center of the pixel; and a plurality of pixel electrodes and common electrodes formed on the first substrate and overlapping with each other with an insulating layer therebetween, each pixel electrode positioned in a pixel, and in which two pixel electrodes in the two pixel columns disposed between two adjacent data lines among the plurality of data lines are both connected to any one of the two data lines.Type: ApplicationFiled: August 1, 2016Publication date: November 24, 2016Inventor: Jong Woong CHANG
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Patent number: 9470945Abstract: A liquid crystal display panel with enhanced image quality is disclosed. The liquid crystal display panel has a plurality of gate lines, a plurality of data lines, a plurality of thin film transistors connected to gate line and data line, a plurality of pixel electrodes, and floating electrode(s). The floating electrode extends along the data line to prevent light leakage and vertical crosstalk. Throughout the whole liquid crystal display panel, the floating electrode is electrically interconnected to lessen vertical crosstalk.Type: GrantFiled: August 24, 2015Date of Patent: October 18, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jong-Woong Chang, Yeong-Keun Kwon
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Patent number: 9405158Abstract: Provided is a liquid crystal display including a plurality of pixels disposed in a matrix of pixel rows and pixel columns, the liquid crystal display including: a plurality of gate lines formed on a first substrate and disposed two between every pixel row; a plurality of data lines formed on the first substrate and disposed one between every two adjacent pixel columns; a common voltage line formed on the first substrate and extending in a pixel row direction along a vertical center of the pixel; and a plurality of pixel electrodes and common electrodes formed on the first substrate and overlapping with each other with an insulating layer therebetween, each pixel electrode positioned in a pixel, and in which two pixel electrodes in the two pixel columns disposed between two adjacent data lines among the plurality of data lines are both connected to any one of the two data lines.Type: GrantFiled: July 7, 2014Date of Patent: August 2, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Jong Woong Chang
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Publication number: 20160202586Abstract: Provided is a liquid crystal display including: a first substrate; a gate line, a data line, and a common voltage line formed on the first substrate; a first passivation layer formed on the gate line, the data line, and the common voltage line; and a pixel electrode and a common electrode formed on the first passivation layer and overlapping each other with a second passivation layer therebetween, and the common electrode is connected to the common voltage line through a common contact hole, and the common contact hole is disposed for every two or more dots.Type: ApplicationFiled: March 21, 2016Publication date: July 14, 2016Inventors: Jong Woong CHANG, Dong Ho SHIN, Yun Tae LEE
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Publication number: 20160195740Abstract: A liquid crystal display, including: a liquid crystal panel; and a visual inspection unit positioned in an outer region of the liquid crystal panel and transferring a test signal to the liquid crystal panel, in which the visual inspection unit includes: a test pad to which a test signal is applied; a first test line connected to the test pad; and a second test line connected to the test pad through a bridge line.Type: ApplicationFiled: June 2, 2015Publication date: July 7, 2016Inventors: Young Jae JEON, Yun Hee KWAK, Hyoung-joon Kim, Jae Ho CHOI, Kyung Hyun Kim, Jong Woong CHANG
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Publication number: 20160139473Abstract: A method to repair a data line in a thin film transistor array panel includes, if the data line is disconnected at a disconnection portion, irradiating a laser on at least one side of the disconnected portion of the data line to short the data line and a storage electrode, and irradiating the laser to separate a portion shorted to the data line among the storage electrode to be disconnected. The storage electrode includes a first portion overlapping the data line between two adjacent gate lines and a second portion connected to the first portion and enclosing an edge of a pixel area except for a region where the first portion is formed. Two adjacent pixel areas are defined by the two adjacent gate lines and two adjacent data lines, and the storage electrode is branched between pixel electrodes.Type: ApplicationFiled: January 22, 2016Publication date: May 19, 2016Inventors: Jong-Woong CHANG, Ho-Kyoon KWON, Shin-Tack KANG
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Publication number: 20160126260Abstract: A liquid crystal display including a plurality of pixels that display an image, each pixel includes a thin film transistor that includes a gate electrode, a source electrode having a bar-shape and partially overlapping the gate electrode, and a drain electrode facing the source electrode at a location corresponding to the gate electrode, the drain electrode includes a first end portion having a C-shape that surrounds a distal end of the bar-shaped source electrode. This design eliminates an overlap between a data line and the gate electrode, which eliminates an overlap between the data line and the channel area of a semiconductor layer, which reduces a parasitic capacitor of the data line, resulting in less current to drive the data line, resulting in reduced power consumption of the display.Type: ApplicationFiled: September 4, 2015Publication date: May 5, 2016Inventor: Jong Woong CHANG
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Patent number: 9312288Abstract: According to an embodiment of the present invention, a thin film transistor array panel includes a gate line and a data line insulated from each other an insulating substrate where the gate line and the data line cross each other to define a pixel region, a thin film transistor (TFT) disposed at an intersection of the gate line and the data line, a floating electrode where at least a portion of the floating electrode overlaps the data line, and a pixel electrode disposed at the pixel region where the pixel electrode is connected to the TFT and overlaps the at least a portion of the floating electrode.Type: GrantFiled: December 5, 2013Date of Patent: April 12, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventor: Jong-woong Chang
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Patent number: 9291849Abstract: Provided is a liquid crystal display including: a first substrate; a gate line, a data line, and a common voltage line formed on the first substrate; a first passivation layer formed on the gate line, the data line, and the common voltage line; and a pixel electrode and a common electrode formed on the first passivation layer and overlapping each other with a second passivation layer therebetween, and the common electrode is connected to the common voltage line through a common contact hole, and the common contact hole is disposed for every two or more dots.Type: GrantFiled: June 5, 2014Date of Patent: March 22, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jong Woong Chang, Dong Ho Shin, Yun Tae Lee
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Patent number: 9286820Abstract: A thin film transistor array panel and a display device including the same are disclosed. In one aspect, the thin film transistor array panel includes a plurality of dots located in a display area, each of the plurality of dots including a plurality of pixels, and a plurality of data lines applying data voltages to the plurality of pixels. The thin film transistor array panel also includes a plurality of first dummy data lines located in a first peripheral area of a peripheral area around the display area, the plurality of first dummy data lines are adjacent to a first edge of the display area. The thin film transistor array panel further includes plurality of first data lines applying data voltages to the pixels included in a first dot adjacent to the first edge and are respectively connected to the plurality of first dummy data lines.Type: GrantFiled: January 31, 2014Date of Patent: March 15, 2016Assignee: Samsung Display Co., Ltd.Inventor: Jong Woong Chang
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Patent number: 9274393Abstract: The present invention relates to a thin film transistor array panel, a liquid crystal display, and a method capable of reducing an effect on neighboring pixels in a process of repairing a pixel defect. The thin film transistor array panel may include: a thin film transistor connected to a gate line and a data line to define a pixel area; a pixel electrode formed in the pixel area and connected to the thin film transistor; and a storage electrode including a first portion overlapping the data line between two adjacent gate lines. The storage electrode may also include a second portion connected to the first portion and enclosing an edge of the pixel area except for a region where the first portion is formed. The storage electrode may be branched between pixel electrodes respectively formed in two adjacent pixel areas.Type: GrantFiled: August 16, 2013Date of Patent: March 1, 2016Assignee: Samsung Display Co., Ltd.Inventors: Jong-Woong Chang, Ho-Kyoon Kwon, Shin-Tack Kang
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Patent number: 9268187Abstract: A liquid crystal display device and a method of repairing bad pixels thereof, in which the bad pixels can be efficiently and easily repaired, includes a first insulating substrate, a gate wiring and a storage wiring arranged substantially parallel to each other in a first direction on the first insulating substrate, a data wiring intersecting the gate and storage wirings in an insulated manner and arranged substantially in a second direction, and a pixel electrode formed on a pixel area defined by the gate and data wirings. The storage wiring includes a horizontal portion arranged substantially in the first direction and at least a part of which does not overlap the pixel electrode, and a vertical portion branching off substantially in the second direction from the horizontal portion and overlapping the data wiring.Type: GrantFiled: July 14, 2015Date of Patent: February 23, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jong-woong Chang, Shin-tack Kang
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Patent number: 9218074Abstract: A gate drive circuit in which multiple stages are connected together one after each other. An n-th stage includes a pull-up part, a carry part, a pull-down part, a switching part, a first maintaining part and a second maintaining part. The pull-up part outputs a high voltage of a first clock signal. The carry part outputs a high voltage of the first clock signal. The pull-down part pulls-down the n-th gate signal into a first low voltage. The switching part outputs a first signal synchronized with the first clock signal during an interval other than a high voltage output interval of the n-th carry signal. The first maintaining part maintains the n-th gate signal at the first low voltage in response to the first signal. The second maintaining part maintains the n-th gate signal at the first low voltage in response to a second signal.Type: GrantFiled: December 19, 2012Date of Patent: December 22, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Duc-Han Cho, Kang-Nam Kim, Jae-Hoon Lee, You-Mee Hyun, Jong-Woong Chang, Yun Heo
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Publication number: 20150362813Abstract: A liquid crystal display panel with enhanced image quality is disclosed. The liquid crystal display panel has a plurality of gate lines, a plurality of data lines, a plurality of thin film transistors connected to gate line and data line, a plurality of pixel electrodes, and floating electrode(s). The floating electrode extends along the data line to prevent light leakage and vertical crosstalk. Throughout the whole liquid crystal display panel, the floating electrode is electrically interconnected to lessen vertical crosstalk.Type: ApplicationFiled: August 24, 2015Publication date: December 17, 2015Inventors: JONG-WOONG CHANG, Yeong-Keun Kwon
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Publication number: 20150362814Abstract: A liquid crystal display device for improving picture quality includes a common electrode formed on a first substrate, gate lines and data lines formed on a second substrate bonded to the first substrate by a sealing member with liquid crystals disposed therebetween, thin film transistors connected to the gate lines and to the data lines, pixel electrodes formed in subpixel regions, each pixel electrode having a long side in a direction of the gate lines and having a short side in a direction of the data lines fanout lines for supplying a driving signals from the driving chips to the data lines, first conductive spacers formed between the fanout lines connected to different driving chips, for supplying a common voltage to the common electrode, and second conductive spacers formed between the fanout lines connected to the same driving chip, for supplying the common voltage to the common electrode.Type: ApplicationFiled: August 24, 2015Publication date: December 17, 2015Inventors: DONG GYU KIM, JONG WOONG CHANG
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Patent number: 9203395Abstract: A gate driver includes a plurality of stages, wherein an n-th stage includes: a pull-up unit configured to output a high voltage of a clock signal as a high voltage of an n-th gate signal; a pull-down unit configured to decrease the high voltage of the n-th gate signal to a first low voltage; a discharging unit configured to discharge a voltage of the first node to a second low voltage lower than the first low voltage; a carry unit configured to output the high voltage of the clock signal as an n-th carry signal; an inverter unit configured to output a signal in synchronization with the clock signal; a first node storage unit configured to maintain the voltage of the first node at the second low voltage; and a second node storage unit configured to maintain the voltage of the second node at the first or second low voltage.Type: GrantFiled: June 28, 2013Date of Patent: December 1, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kang Nam Kim, Duc-Han Cho, You Mee Hyun, Jeong-Il Kim, Jong Woong Chang
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Publication number: 20150316826Abstract: A liquid crystal display device and a method of repairing bad pixels thereof, in which the bad pixels can be efficiently and easily repaired, includes a first insulating substrate, a gate wiring and a storage wiring arranged substantially parallel to each other in a first direction on the first insulating substrate, a data wiring intersecting the gate and storage wirings in an insulated manner and arranged substantially in a second direction, and a pixel electrode formed on a pixel area defined by the gate and data wirings. The storage wiring includes a horizontal portion arranged substantially in the first direction and at least a part of which does not overlap the pixel electrode, and a vertical portion branching off substantially in the second direction from the horizontal portion and overlapping the data wiring.Type: ApplicationFiled: July 14, 2015Publication date: November 5, 2015Inventors: Jong-woong CHANG, Shin-tack KANG
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Patent number: 9164344Abstract: A liquid crystal display device and a method of repairing bad pixels thereof, in which the bad pixels can be efficiently and easily repaired, includes a first insulating substrate, a gate wiring and a storage wiring arranged substantially parallel to each other in a first direction on the first insulating substrate, a data wiring intersecting the gate and storage wirings in an insulated manner and arranged substantially in a second direction, and a pixel electrode formed on a pixel area defined by the gate and data wirings. The storage wiring includes a horizontal portion arranged substantially in the first direction and at least a part of which does not overlap the pixel electrode, and a vertical portion branching off substantially in the second direction from the horizontal portion and overlapping the data wiring.Type: GrantFiled: January 27, 2015Date of Patent: October 20, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jong-woong Chang, Shin-tack Kang