Patents by Inventor Ho-Cheol Kang
Ho-Cheol Kang 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: 11961457Abstract: A display device, includes: a display panel including a pixel electrically coupled to a gate line and a data line; a gate driver configured to provide a gate signal to the gate line; and a data driver configured to provide a data signal to the data line, wherein the gate driver is configured to sequentially provide a first gate signal and a second gate signal to the gate line during a first frame period, wherein the data driver is configured to provide a first data signal to the data line in response to the first gate signal, and to provide a second data signal to the data line in response to the second gate signal, and wherein the second data signal is different from the first data signal and varies dependent on the first data signal.Type: GrantFiled: January 9, 2023Date of Patent: April 16, 2024Assignee: Samsung Display Co., Ltd.Inventors: Jae Hyun Koh, Sung Hoon Bang, Eui Myeong Cho, Ho Cheol Kang, Seok Young Yoon
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Publication number: 20240111433Abstract: In some embodiments, a memory system includes a memory device and a host configured to transmit, to the memory device, a command and address (C/A) signal and a clock signal, and to transmit or receive data signals to or from the memory device. Each command that is configured to access the memory device is associated with an access timing parameter. The memory device includes an access parameter timer configured to measure an actual timing value of the access timing parameter, a spec register configured to provide a spec timing value defining an effective timing of the access timing parameter, a comparison circuit configured to compare the actual timing value and the spec timing value, and a mode register configured to store an access timing violation flag that is read by the host when the actual timing value deviates from the spec timing value by exceeding a predetermined range.Type: ApplicationFiled: May 19, 2023Publication date: April 4, 2024Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sang-Kyu KANG, Jieun SHIN, Ho-Cheol BANG, Haewon LEE
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Publication number: 20230267885Abstract: A pixel includes a first transistor connected between a first power line and a first node, and including a gate electrode connected to a second node, a second transistor connected between a data line and the second node, and including a gate electrode connected to a scan line, a third transistor connected between a first sensing line and the first node, and including a gate electrode connected to a first control line, a fourth transistor connected between a second sensing line and a third node, and including gate electrode connected to a second control line, a first sub light emitting unit including light emitting elements connected in parallel in a forward direction between the first node and the third node, and a second sub light emitting unit including light emitting elements connected in parallel in the forward direction between the third node and a second power line.Type: ApplicationFiled: February 21, 2023Publication date: August 24, 2023Inventors: Eui Myeong CHO, Ho Cheol KANG, Jae Hyun KOH, Seok Young YOON
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Publication number: 20230230534Abstract: A display device, includes: a display panel including a pixel electrically coupled to a gate line and a data line; a gate driver configured to provide a gate signal to the gate line; and a data driver configured to provide a data signal to the data line, wherein the gate driver is configured to sequentially provide a first gate signal and a second gate signal to the gate line during a first frame period, wherein the data driver is configured to provide a first data signal to the data line in response to the first gate signal, and to provide a second data signal to the data line in response to the second gate signal, and wherein the second data signal is different from the first data signal and varies dependent on the first data signal.Type: ApplicationFiled: January 9, 2023Publication date: July 20, 2023Inventors: Jae Hyun KOH, Sung Hoon BANG, Eui Myeong CHO, Ho Cheol KANG, Seok Young YOON
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Publication number: 20230215346Abstract: A display device includes: pixels, each of the pixels including at least one light emitting element and a first transistor configured to supply a driving current to the at least one light emitting element; a sensing unit configured to sense a driving current of the first transistor, which corresponds to a data voltage applied to one pixel from among the pixels, the sensing unit being configured to detect a luminance of the light emitting element, which corresponds to the driving current; a gamma calculator configured to receive the driving current and the luminance of the light emitting element from the sensing unit, to calculate a gamma changed based on the driving current and the luminance of the light emitting element, and to provide, to a memory, the gamma changed based on the driving current and the luminance of the light emitting element.Type: ApplicationFiled: December 2, 2022Publication date: July 6, 2023Inventors: Eui Myeong CHO, Ho Cheol KANG, Jae Hyun KOH, Seok Young YOON
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Publication number: 20230132426Abstract: The present invention relates to a system and method for separating and recovering hydrogen from coke oven gas (COG) in steel industry, particularly a system and method for separating and recovering hydrogen at a concentration of 99.9% by volume or more from coke oven gas (COG) in steel industry with a recovery rate of 95% or more.Type: ApplicationFiled: October 24, 2022Publication date: May 4, 2023Inventors: Jeong Hoon KIM, Bo Ryoung PARK, Ho Cheol KANG
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Patent number: 11501698Abstract: A display device includes a pixel. The pixel includes an emission unit and a pixel circuit. The pixel circuit to provide a first driving current to the emission unit in a first current flowing direction in a first mode, and to provide a second driving current to the emission unit in a second current flowing direction different from the first current flowing direction in a second mode. The emission unit includes a first electrode and a second electrode spaced from each other, a first light emitting element connected between the first electrode and the second electrode in the first current flowing direction, and a second light emitting element connected between the first electrode and the second electrode in the second current flowing direction.Type: GrantFiled: July 30, 2021Date of Patent: November 15, 2022Assignee: Samsung Display Co., Ltd.Inventors: Eui Myeong Cho, Ho Cheol Kang, Seok Young Yoon, Dae Gwang Jang
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Publication number: 20220168688Abstract: The present invention relates to a separation and recovery system and method of hydrogen from a coke oven gas (COG) in a steel industry, and more particularly, to a separation and recovery system and method of hydrogen from a coke oven gas (COG) in a steel industry, the system including a pre-processing unit removing impurities including tar, moisture, oil, hydrogen sulfide, and dusts from the coke oven gas (COG), a membrane separation unit including a polymer separation membrane module to generate a hydrogen concentrated gas stream by membrane-separating the coke oven gas (COG) processed in the pre-processing unit, and an adsorption unit separate and recover the hydrogen by allowing the hydrogen concentrated gas stream to contact an absorbent.Type: ApplicationFiled: October 6, 2021Publication date: June 2, 2022Inventors: Jeong Hoon KIM, Jong Yeol JEON, Bo Ryoung PARK, Ho Cheol KANG
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Publication number: 20220122524Abstract: A display device includes a pixel. The pixel includes an emission unit and a pixel circuit. The pixel circuit to provide a first driving current to the emission unit in a first current flowing direction in a first mode, and to provide a second driving current to the emission unit in a second current flowing direction different from the first current flowing direction in a second mode. The emission unit includes a first electrode and a second electrode spaced from each other, a first light emitting element connected between the first electrode and the second electrode in the first current flowing direction, and a second light emitting element connected between the first electrode and the second electrode in the second current flowing direction.Type: ApplicationFiled: July 30, 2021Publication date: April 21, 2022Inventors: Eui Myeong Cho, Ho Cheol Kang, Seok Young Yoon, Dae Gwang Jang
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Patent number: 11282427Abstract: A display device includes pixels coupled to scan lines, control lines, data lines, and sensing lines, a scan driver for supplying a scan signal to the scan lines and supplying a control signal to the control lines, a data driver for supplying one of an image data signal and a sensing data signal to the data lines, and a sensing circuit including an analog-digital converter (“ADC”) which converts a sensing value supplied through the sensing lines into a current code in a digital form, the sensing circuit correcting the current code by reflecting a conversion characteristic of the ADC, the sensing circuit sensing characteristics of the driving transistor based on the corrected current code.Type: GrantFiled: August 31, 2020Date of Patent: March 22, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ha Neul Kim, Ho Cheol Kang, Dae Gwang Jang, Young Soo Hwang
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Publication number: 20220062815Abstract: Disclosed herein is a system for recovering carbon monoxide from an industrial by-product gas, the system including a supply unit for supplying an industrial by-product gas containing carbon dioxide, nitrogen, carbon monoxide, and hydrogen, a first membrane separation unit including a separation membrane capable of allowing carbon dioxide and hydrogen to permeate, and receiving the industrial by-product gas supplied from the supply unit to allow carbon dioxide and hydrogen to permeate, and a second membrane separation unit including a polymer membrane in which a transition metal is supported, and receiving a gas remaining in the first membrane separation unit to allow carbon monoxide to permeate.Type: ApplicationFiled: August 30, 2021Publication date: March 3, 2022Applicant: Korea Research Institute of Chemical TechnologyInventors: Jeong Hoon Kim, Jong Yeol Jeon, Bo Ryoung Park, Ho Cheol Kang
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Patent number: 11127352Abstract: An electrostatic discharge protection circuit including: a first electrostatic discharge diode including a cathode to receive a first voltage, and an anode connected to a sensing line; a first switching element to determine the first voltage as a precharging voltage applied to a source terminal of the driving transistor when a sensing operation is performed, and to determine the first voltage as a maximum voltage used in a display panel when the sensing operation is not performed; a second electrostatic discharge diode including a cathode connected to the sensing line, and an anode configured to receive a second voltage; and a second switching element configured to determine the second voltage as the precharging voltage when the sensing operation is performed, and to determine the second voltage as a minimum voltage used in the display panel when the sensing operation is not performed.Type: GrantFiled: November 24, 2020Date of Patent: September 21, 2021Assignee: Samsung Display Co., Ltd.Inventors: Ho Cheol Kang, Ha Neul Kim, Dae-Gwang Jang, Young-Soo Hwang
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Publication number: 20210248943Abstract: A display device includes pixels coupled to scan lines, control lines, data lines, and sensing lines, a scan driver for supplying a scan signal to the scan lines and supplying a control signal to the control lines, a data driver for supplying one of an image data signal and a sensing data signal to the data lines, and a sensing circuit including an analog-digital converter (“ADC”) which converts a sensing value supplied through the sensing lines into a current code in a digital form, the sensing circuit correcting the current code by reflecting a conversion characteristic of the ADC, the sensing circuit sensing characteristics of the driving transistor based on the corrected current code.Type: ApplicationFiled: August 31, 2020Publication date: August 12, 2021Inventors: Ha Neul KIM, Ho Cheol KANG, Dae Gwang JANG, Young Soo HWANG
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Publication number: 20210225290Abstract: An electrostatic discharge protection circuit including: a first electrostatic discharge diode including a cathode to receive a first voltage, and an anode connected to a sensing line; a first switching element to determine the first voltage as a precharging voltage applied to a source terminal of the driving transistor when a sensing operation is performed, and to determine the first voltage as a maximum voltage used in a display panel when the sensing operation is not performed; a second electrostatic discharge diode including a cathode connected to the sensing line, and an anode configured to receive a second voltage; and a second switching element configured to determine the second voltage as the precharging voltage when the sensing operation is performed, and to determine the second voltage as a minimum voltage used in the display panel when the sensing operation is not performed.Type: ApplicationFiled: November 24, 2020Publication date: July 22, 2021Inventors: Ho Cheol KANG, Ha Neul KIM, Dae-Gwang JANG, Young-Soo HWANG
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Patent number: 9073752Abstract: The present invention relates to a quantum dot light emitting element which can form a quantum light emitting layer configured of charge transporting particles and quantum dots and a charge transporting layer in a solution process, to reduce process expense, and a method for manufacturing the same. The quantum dot light emitting element includes a substrate, an anode formed on the substrate, a quantum light emitting layer formed on the anode, the quantum light emitting layer having charge transporting particles and quantum dots mixed therein, and a cathode formed on the quantum light emitting layer.Type: GrantFiled: May 20, 2011Date of Patent: July 7, 2015Assignees: LG Display Co., Ltd., SNU R&DB FOUNDATIONInventors: Ho-Cheol Kang, Young-Hoon Noh, Chang-Hee Lee, Kook Heon Char, Seong-Hoon Lee, Jeong Hun Kwak, Wan Ki Bae, Jae Hoon Lim, Dong Gu Lee
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Patent number: 9064832Abstract: An array substrate for a display device, including a substrate having a pixel region and a switching region, a source electrode and a drain electrode on the switching region of the substrate, ends of the source and drain electrodes having tapered edges, a pixel electrode in the pixel region of the substrate, the pixel electrode being connected to the drain electrode, an organic semiconductor layer on the source and drain electrodes, the organic semiconductor layer completely contacting tapered edges and a top surface of each of the source and drain electrodes, a first insulating layer on the organic semiconductor layer, and a gate electrode on the first insulating layer.Type: GrantFiled: July 6, 2010Date of Patent: June 23, 2015Assignee: LG Display Co., Ltd.Inventors: Young-Hoon Noh, Ho-Cheol Kang
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Patent number: 9012898Abstract: An electrophoretic display device includes: a first substrate having a plurality of pixels formed in a plurality of vertical pixel rows and a plurality of horizontal pixel rows; a plurality of data lines formed at every vertical pixel row of the first substrate; a thin film transistor (TFT) formed at each pixel of the first substrate and including a source electrode, a drain electrode, an organic semiconductor layer, and a gate electrode; a passivation layer formed on the TFTs and the data lines of the first substrate and including a first contact hole exposing the drain electrode of the TFT and a second contact hole exposing the gate electrode of the TFT; a pixel electrode formed on the passivation layer at each pixel of the first substrate and connected with the drain electrode of the TFT via the first contact hole of the passivation layer; a plurality of gate lines formed on the passivation layer at every horizontal pixel row of the first substrate and connected with the gate electrode of the TFT via the sType: GrantFiled: January 30, 2013Date of Patent: April 21, 2015Assignee: LG Display Co., Ltd.Inventors: Min-Joo Kim, Ho-Cheol Kang, Dae-Won Kim, Young-Hoon Noh, Han-Saem Kang
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Patent number: 8552416Abstract: The present invention relates to a quantum dot light emitting diode device in which a hole transportation layer is formed after forming a quantum dot light emitting layer by a solution process by applying an inverted type quantum dot light emitting diode device for making free selection of a hole transportation layer material that enables easy injection of a hole to the quantum dot light emitting layer; and display device and method therewith.Type: GrantFiled: May 25, 2011Date of Patent: October 8, 2013Assignees: LG Display Co., Ltd., SNU R&DB FoundationInventors: Young-Mi Kim, Ho-Cheol Kang, Ho-Jin Kim, Chang-Hee Lee, Kook-Heon Char, Seong-Hoon Lee, Jeong-Hun Kwak, Wan-Ki Bae, Dong-Gu Lee, Jae-Hoon Lim
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Patent number: 8377735Abstract: An electrophoretic display device includes: a first substrate having a plurality of pixels formed in a plurality of vertical pixel rows and a plurality of horizontal pixel rows; a plurality of data lines formed at every vertical pixel row of the first substrate; a thin film transistor (TFT) formed at each pixel of the first substrate and including a source electrode, a drain electrode, an organic semiconductor layer, and a gate electrode; a passivation layer formed on the TFTs and the data lines of the first substrate and including a first contact hole exposing the drain electrode of the TFT and a second contact hole exposing the gate electrode of the TFT; a pixel electrode formed on the passivation layer at each pixel of the first substrate and connected with the drain electrode of the TFT via the first contact hole of the passivation layer; a plurality of gate lines formed on the passivation layer at every horizontal pixel row of the first substrate and connected with the gate electrode of the TFT via the sType: GrantFiled: November 13, 2009Date of Patent: February 19, 2013Assignee: LG Display Co. Ltd.Inventors: Min-Joo Kim, Ho-Cheol Kang, Dae-Won Kim, Young-Hoon Noh, Han-Saem Kang
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Patent number: 8174635Abstract: An electrostatic discharge protection element, a liquid crystal display device having the same, and a manufacturing method. A first ESD organic TFT, a second ESD organic TFT, a third ESD organic TFT each have a gate electrode, a source electrode and a drain electrode in which the source electrode and drain electrode of the first and second ESD organic TFTs and the gate electrode of the third ESD organic TFT are electrically connected. The gate electrode and the source electrode of the first ESD organic TFT are electrically connected to a first array line and the gate electrode and the drain electrode of the second ESD organic TFT are electrically connected to a second array line. The source electrode of the third ESD organic TFT is electrically connected to a data line or a gate line and the drain of the third ESD organic TFT are electrically connected to a common voltage line.Type: GrantFiled: June 22, 2011Date of Patent: May 8, 2012Assignee: LG Display Co., Ltd.Inventors: Min Joo Kim, Ho Cheol Kang, Kyo Seop Choo