Patents by Inventor Chulwon Lee
Chulwon Lee 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: 20240092334Abstract: A method of setting the contact position between the operating cam and the roller for the air brake which includes a leading shoe and a trailing shoe respectively provided with a first roller and a second roller, a first lining and a second lining respectively provided on external surfaces of the leading shoe and the trailing shoe, a drum disposed on a circumference of the back plate, and the operating cam disposed to support the first roller and the second roller therebetween to rotate in a direction of expanding a gap between the leading shoe and the trailing shoe, includes setting the contact position between the operating cam and the second roller so that a direction in which the operating cam presses the second roller during braking is moved in a rotation direction of the drum when the vehicle moves backward thereof.Type: ApplicationFiled: August 14, 2023Publication date: March 21, 2024Applicants: Hyundai Motor Company, Kia CorporationInventors: Sangheon RYU, Sangweol HAN, Chulwon LEE
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Patent number: 10559272Abstract: A display device and a method of driving the same are disclosed. The display device includes a display panel configured to display an image, and a parasitic capacitor compensation circuit including a compensation capacitor connected to a sensing line of the display panel and a control switch configured to perform a switching operation so that the compensation capacitor has a predetermined capacitance. The control switch is turned on in an image display operation of the display panel and is turned off in a sensing operation of the display panel.Type: GrantFiled: November 8, 2017Date of Patent: February 11, 2020Assignee: LG Display Co., Ltd.Inventors: Chulwon Lee, Juyoung Noh
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Patent number: 10522077Abstract: An organic light-emitting display can include a display panel including sensing lines connected to pixels; a current integrator configured to receive current from a pixel through a sensing line connected to a first input terminal, receive a reference voltage through a reference voltage line connected to a second input terminal, and swap a path through which the current applied through the first input terminal flows and a path through which the reference voltage applied through the second input terminal is supplied; a sampling part including a first sample and hold circuit for sampling a first output voltage of the current integrator and a second sample and hold circuit for sampling a second output voltage of the current integrator, subsequent to the first output voltage, which outputs the first and second output voltages sampled by the first and second sample and hold circuits simultaneously through a single output channel.Type: GrantFiled: November 30, 2016Date of Patent: December 31, 2019Assignee: LG DISPLAY CO., LTD.Inventors: Kyoungdon Woo, Chulwon Lee, Myunggi Lim, Juyoung Noh
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Patent number: 10152920Abstract: A current sensing unit can include a current sink circuit connected to a sensing line, which reduces a pixel current fed via the sensing line by an amount equal to a sink current; a current integrator connected to the sensing line, which accumulates an adjusted current from the sensing line and outputs an integrated value based on the pixel current minus the sink current; a sampling part that samples and holds the integrated value; and an analog-to-digital converter that converts the integrated value from an analog value to a digital sensed value.Type: GrantFiled: April 5, 2017Date of Patent: December 11, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Chulwon Lee, Seungtae Kim
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Publication number: 20180144705Abstract: A display device and a method of driving the same are disclosed. The display device includes a display panel configured to display an image, and a parasitic capacitor compensation circuit including a compensation capacitor connected to a sensing line of the display panel and a control switch configured to perform a switching operation so that the compensation capacitor has a predetermined capacitance. The control switch is turned on in an image display operation of the display panel and is turned off in a sensing operation of the display panel.Type: ApplicationFiled: November 8, 2017Publication date: May 24, 2018Inventors: Chulwon LEE, Juyoung NOH
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Patent number: 9941018Abstract: A gate driving circuit and a display device using the same are discussed. The gate driving circuit according to an embodiment includes a first shift register configured to sequentially shift a gate start pulse in response to a gate shift clock and output a gate pulse shifted on a per block basis, each block including a plurality of gate lines, a second shift register configured to sequentially shift the gate start pulse in response to the gate shift clock and output a gate pulse shifted on a per gate line basis, and a controller configured to supply the gate shift clock to one of the first and second shift registers.Type: GrantFiled: September 17, 2015Date of Patent: April 10, 2018Assignee: LG DISPLAY CO., LTD.Inventors: Seokhyun Hong, Chulwon Lee, Juyoung Noh, Osung Do
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Patent number: 9898962Abstract: An organic light emitting display device is disclosed, which may increase sensing accuracy by solving a problem that a difference between sensing data output from sensing units is generated due to a difference in sensing capability between the sensing units. The organic light emitting display device includes a display panel including data lines, scan lines, sensing lines, and pixels connected to the data lines, the scan lines and the sensing lines; a sensing data output unit outputting first sensing data by sensing currents flowing to the sensing lines; a scan driver supplying scan signals to the scan lines; and a source drive integrated circuit (IC) including a data voltage supply unit supplying data voltages to the data lines and a switching unit connecting the sensing lines to the sensing data output unit in a predetermined order.Type: GrantFiled: December 8, 2015Date of Patent: February 20, 2018Assignee: LG Display Co., Ltd.Inventors: JunHyeok Yang, ChulWon Lee, Juyoung Noh
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Patent number: 9870737Abstract: A sensing circuit capable of simplifying a configuration of a data driver by reducing a size of a sensing circuit provided at each data driver, and an organic light emitting diode (OLED) display device having the same are provided. The sensing circuit includes N sampling and holding circuits, a scaler and an analog-digital converter.Type: GrantFiled: December 16, 2015Date of Patent: January 16, 2018Assignee: LG DISPLAY CO., LTD.Inventors: ChulWon Lee, SeungTae Kim
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Publication number: 20170294159Abstract: A current sensing unit can include a current sink circuit connected to a sensing line, which reduces a pixel current fed via the sensing line by an amount equal to a sink current; a current integrator connected to the sensing line, which accumulates an adjusted current from the sensing line and outputs an integrated value based on the pixel current minus the sink current; a sampling part that samples and holds the integrated value; and an analog-to-digital converter that converts the integrated value from an analog value to a digital sensed value.Type: ApplicationFiled: April 5, 2017Publication date: October 12, 2017Applicant: LG Display Co., Ltd.Inventors: Chulwon LEE, Seungtae KIM
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Publication number: 20170154573Abstract: An organic light-emitting display can include a display panel including sensing lines connected to pixels; a current integrator configured to receive current from a pixel through a sensing line connected to a first input terminal, receive a reference voltage through a reference voltage line connected to a second input terminal, and swap a path through which the current applied through the first input terminal flows and a path through which the reference voltage applied through the second input terminal is supplied; a sampling part including a first sample and hold circuit for sampling a first output voltage of the current integrator and a second sample and hold circuit for sampling a second output voltage of the current integrator, subsequent to the first output voltage, which outputs the first and second output voltages sampled by the first and second sample and hold circuits simultaneously through a single output channel.Type: ApplicationFiled: November 30, 2016Publication date: June 1, 2017Applicant: LG DISPLAY CO., LTD.Inventors: Kyoungdon WOO, Chulwon LEE, Myunggi LIM, Juyoung NOH
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Publication number: 20160189622Abstract: A sensing circuit capable of simplifying a configuration of a data driver by reducing a size of a sensing circuit provided at each data driver, and an organic light emitting diode (OLED) display device having the same are provided. The sensing circuit includes N sampling and holding circuits, a scaler and an analog-digital converter.Type: ApplicationFiled: December 16, 2015Publication date: June 30, 2016Applicant: LG DISPLAY CO., LTD.Inventors: ChulWon LEE, SeungTae KIM
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Publication number: 20160163265Abstract: An organic light emitting display device is disclosed, which may increase sensing accuracy by solving a problem that a difference between sensing data output from sensing units is generated due to a difference in sensing capability between the sensing units. The organic light emitting display device includes a display panel including data lines, scan lines, sensing lines, and pixels connected to the data lines, the scan lines and the sensing lines; a sensing data output unit outputting first sensing data by sensing currents flowing to the sensing lines; a scan driver supplying scan signals to the scan lines; and a source drive integrated circuit (IC) including a data voltage supply unit supplying data voltages to the data lines and a switching unit connecting the sensing lines to the sensing data output unit in a predetermined order.Type: ApplicationFiled: December 8, 2015Publication date: June 9, 2016Applicant: LG Display Co., Ltd.Inventors: JunHyeok Yang, ChulWon Lee, Juyoung Noh
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Patent number: 9336284Abstract: A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, determination of a second database node of the two or more database nodes associated with the first query, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and a first identifier of the second database node from the first database node to the client device.Type: GrantFiled: June 17, 2014Date of Patent: May 10, 2016Assignee: SAP SEInventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Publication number: 20160078834Abstract: A gate driving circuit and a display device using the same are discussed. The gate driving circuit according to an embodiment includes a first shift register configured to sequentially shift a gate start pulse in response to a gate shift clock and output a gate pulse shifted on a per block basis, each block including a plurality of gate lines, a second shift register configured to sequentially shift the gate start pulse in response to the gate shift clock and output a gate pulse shifted on a per gate line basis, and a controller configured to supply the gate shift clock to one of the first and second shift registers.Type: ApplicationFiled: September 17, 2015Publication date: March 17, 2016Applicant: LG DISPLAY CO., LTD.Inventors: Seokhyun HONG, Chulwon LEE, Juyoung NOH, Osung DO
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Patent number: 9037677Abstract: A system includes reception of a first query from a client device at a first database node of a database instance, determination of routing information associated with the first query, compilation of the first query at the first database node to generate first compiled code, transmission of the first compiled code and the routing information to the client device, reception of the compiled code from the client device at a second database node, determination, at the second database node, that data associated with the compiled query is associated with a third database node, transmission of the compiled code from the second database node to the third database node, reception of query results at the second database node from the third database node, and transmission of the query results and an indication to update the routing information from the second database node to the client device.Type: GrantFiled: April 17, 2012Date of Patent: May 19, 2015Assignee: SAP SEInventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Publication number: 20140297686Abstract: A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, determination of a second database node of the two or more database nodes associated with the first query, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and a first identifier of the second database node from the first database node to the client device.Type: ApplicationFiled: June 17, 2014Publication date: October 2, 2014Inventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Patent number: 8793276Abstract: A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, determination of a second database node of the two or more database nodes associated with the first query, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and a first identifier of the second database node from the first database node to the client device.Type: GrantFiled: April 17, 2012Date of Patent: July 29, 2014Assignee: SAP AGInventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Patent number: 8700660Abstract: A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, the first query specifying a first database table which is partitioned among two or more of the two or more database nodes, determination of first partitioning metadata of the first database table, the first partitioning metadata usable to identify one of the two or more database nodes based on table key values, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and the first partitioning metadata from the first database node to the client device.Type: GrantFiled: April 17, 2012Date of Patent: April 15, 2014Assignee: SAP AGInventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Publication number: 20130275457Abstract: A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, the first query specifying a first database table which is partitioned among two or more of the two or more database nodes, determination of first partitioning metadata of the first database table, the first partitioning metadata usable to identify one of the two or more database nodes based on table key values, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and the first partitioning metadata from the first database node to the client device.Type: ApplicationFiled: April 17, 2012Publication date: October 17, 2013Inventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha
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Publication number: 20130275468Abstract: A system includes reception of a first query of a first transaction from a client device at a first database node of a database instance comprising two or more database nodes, request of a first transaction token associated with the first transaction from a second database node of the two or more database nodes, reception of the first transaction token from the second database node at the first database node, execution of the first query at the first database node to generate first results, and transmission of the first results and the first transaction token from the first database node to the client device.Type: ApplicationFiled: April 17, 2012Publication date: October 17, 2013Inventors: Juchang Lee, Jaeyun Noh, Chulwon Lee, Michael Muehle, Alexander Schroeder, Marco Paskamp, Sang Kyun Cha