Patents by Inventor Chul-Ho Choi
Chul-Ho Choi 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: 12040209Abstract: The present invention relates to an electrostatic chuck heater and a manufacturing method therefor and, more particularly, to an electrostatic chuck heater comprising: a ground electrode; and an electrostatic chuck electrode spaced a predetermined distance apart from the outside of the ground electrode, wherein the heater can reduce the phenomenon of rising of a wafer edge and thus can significantly reduce the temperature deviation according to positions on a heating surface of an object, such as a wafer, so as to increase the temperature uniformity of the heating surface.Type: GrantFiled: January 24, 2019Date of Patent: July 16, 2024Assignee: MICO CERAMICS LTD.Inventors: Chul Ho Jung, Jin Young Choi
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Publication number: 20240177114Abstract: Provided are a system for business process automation and a method thereof. The system according to some embodiments may include a connect manager configured to register and manage application programming interface (API) information for services, a process execution engine configured to execute a target business process comprising a particular service task, which is a task using a particular service provided by a service module, and a connect broker configured to acquire API information for the particular service, registered through the connect manager, during execution of the target business process in response to a request from the process execution engine, and process the particular service task by sending a request for the particular service to the service module using the acquired API information.Type: ApplicationFiled: November 13, 2023Publication date: May 30, 2024Applicant: SAMSUNG SDS CO., LTD.Inventors: Young Sik JUNG, Moo Young CHO, Kang Hyeok LEE, Hyong Gook KIM, In Yong JANG, Chul Ho CHOI, Jeong Heon KIM, Ho Kyung YOO, Yeong Ho LEE, Kyung Ho CHO, Tae Jin HWANG, Jung Hee YOON, Hee Jong KIM
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Patent number: 10997882Abstract: A display device including: a panel unit including N data lines; and a data line driver unit including N channels, wherein the data line driver unit includes a channel amplifier unit, and a short detection device for detecting whether or not a short has occurred between two data lines among the N data lines, wherein N is an integer of 2 or more.Type: GrantFiled: January 30, 2019Date of Patent: May 4, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Oh Kim, Sung Jin Lim, Chul Ho Choi, Ryan Wang, Dashih Chang, Ha Joon Shin, Hanss Su, Jin Soo Kim, Jin Woo Kim, Kyung Gyu Park, Sam Liu, Yao Sheng Liang
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Patent number: 10770022Abstract: A source driver including: a first source line; a second source line; a charge sharing switch which controls a connection between the first source line and the second source line; a first cross charge sharing switch which controls a connection between a first capacitor and the first source line, and a connection between a second capacitor and the second source line; and a second cross charge sharing switch which controls a connection between the first capacitor and the second source line, and a connection between the second capacitor and the first source line.Type: GrantFiled: February 28, 2019Date of Patent: September 8, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Joway Chen, Chul Ho Choi, Dip Wu, Hyeong Tae Kim, Yuwen Chiou, Jin Woo Kim
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Patent number: 10692456Abstract: A display driver includes a first latch storing first image data, a second latch storing second image data, and a buffer unit including a plurality of output buffers outputting a source voltage corresponding to the first image data. Each of the plurality of output buffers includes an input stage, an output stage, and a pre-charge circuit connected between the input stage and the output stage. A pre-charge control unit compares the first image data with the second image data to control the pre-charge circuit.Type: GrantFiled: January 24, 2019Date of Patent: June 23, 2020Assignee: Samsung Electronics Co., Ltd.Inventors: Chul Ho Choi, Dip Wu, Jason Kuo, Jin Soo Kim, Joway Chen, Yuwen Chiou, Robert Lin
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Publication number: 20200043432Abstract: A display driver includes a first latch storing first image data, a second latch storing second image data, and a buffer unit including a plurality of output buffers outputting a source voltage corresponding to the first image data. Each of the plurality of output buffers includes an input stage, an output stage, and a pre-charge circuit connected between the input stage and the output stage. A pre-charge control unit compares the first image data with the second image data to control the pre-charge circuit.Type: ApplicationFiled: January 24, 2019Publication date: February 6, 2020Inventors: CHUL HO CHOI, DIP WU, JASON KUO, JIN SOO KIM, JOWAY CHEN, YUWEN CHIOU, ROBERT LIN
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Publication number: 20200027379Abstract: A display device including: a panel unit including N data lines; and a data line driver unit including N channels, wherein the data line driver unit includes a channel amplifier unit, and a short detection device for detecting whether or not a short has occurred between two data lines among the N data lines, wherein N is an integer of 2 or more.Type: ApplicationFiled: January 30, 2019Publication date: January 23, 2020Inventors: Jin Oh KIM, Sung Jin LIM, Chul Ho CHOI, Ryan WANG, Dashih CHANG, Ha Joon SHIN, Hanss SU, Jin Soo KIM, Jin Woo KIM, Kyung Gyu PARK, Sam LIU, Yao Sheng LIANG
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Publication number: 20190340994Abstract: A source driver including: a first source line; a second source line; a charge sharing switch which controls a connection between the first source line and the second source line; a first cross charge sharing switch which controls a connection between a first capacitor and the first source line, and a connection between a second capacitor and the second source line; and a second cross charge sharing switch which controls a connection between the first capacitor and the second source line, and a connection between the second capacitor and the first source line.Type: ApplicationFiled: February 28, 2019Publication date: November 7, 2019Inventors: JOWAY CHEN, Chul Ho Choi, Dip Wu, Hyeong Tae Kim, Yuwen Chiou, Jin Woo Kim
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Patent number: 9947282Abstract: A display driver circuit including a gate driver driving gate lines of a display panel according to a driving order. The gate lines are disposed in an ordered arrangement within the display panel. A source driver converts image data corresponding to a selected gate line into an image signal and outputs the image signal to a source line of the display panel. A timing controller calculates comparison values by comparing a first image data portion corresponding to a first gate line with image data portions respectively corresponding to gate lines of the plurality of gate lines. The timing controller sets the driving order for the gate lines in response to the comparison values.Type: GrantFiled: February 18, 2016Date of Patent: April 17, 2018Assignee: Samsung Electronics Co., Ltd.Inventor: Chul-Ho Choi
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Publication number: 20160267868Abstract: A display driver circuit including a gate driver driving gate lines of a display panel according to a driving order. The gate lines are disposed in an ordered arrangement within the display panel. A source driver converts image data corresponding to a selected gate line into an image signal and outputs the image signal to a source line of the display panel. A timing controller calculates comparison values by comparing a first image data portion corresponding to a first gate line with image data portions respectively corresponding to gate lines of the plurality of gate lines. The timing controller sets the driving order for the gate lines in response to the comparison values.Type: ApplicationFiled: February 18, 2016Publication date: September 15, 2016Inventor: CHUL-HO CHOI
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Output buffer circuit, devices including the same, and operating method of the output buffer circuit
Patent number: 8963448Abstract: An output buffer circuit includes an amplifier and a transmission circuit. The amplifier includes a plurality of inputs and an output. The inputs provide first input signals and second input signals to the amplifier. The output provides an output signal as a first input signal of the first input signals to the amplifier. The transmission circuit has an input coupled to the output of the amplifier and further has an output that provides a transmission circuit output signal as a second input signal of the second input signals to the amplifier.Type: GrantFiled: March 13, 2013Date of Patent: February 24, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Hyung Tae Kim, Soo Ik Cha, Jun Ho Song, Jin Chul Choi, Chul Ho Choi -
OUTPUT BUFFER CIRCUIT, DEVICES INCLUDING THE SAME, AND OPERATING METHOD OF THE OUTPUT BUFFER CIRCUIT
Publication number: 20130334985Abstract: An output buffer circuit includes an amplifier and a transmission circuit. The amplifier includes a plurality of inputs and an output. The inputs provide first input signals and second input signals to the amplifier. The output provides an output signal as a first input signal of the first input signals to the amplifier. The transmission circuit has an input coupled to the output of the amplifier and further has an output that provides a transmission circuit output signal as a second input signal of the second input signals to the amplifier.Type: ApplicationFiled: March 13, 2013Publication date: December 19, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyung Tae KIM, Soo Ik CHA, Jun Ho SONG, Jin Chul CHOI, Chul Ho CHOI -
Patent number: 8427459Abstract: A driving circuit includes a pair of first amplifiers and a pair of second amplifiers for amplifying output signal of the first amplifiers. The input signal of any one of the pair of second amplifiers is input by passing through any one of the pair of first amplifiers. The input signal of the other one of the pair of second amplifiers is input by passing through the other one of the pair of first amplifiers.Type: GrantFiled: February 16, 2010Date of Patent: April 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jun Ho Song, Chul Ho Choi
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Patent number: 8350797Abstract: A buffer amplifier includes an input stage and an output stage. The input stage has input high and low power voltages applied thereon for generating at least one transmission signal from an input signal. The output stage has output high and low power voltages applied thereon for generating an output signal from the at least one transmission signal. A first difference between the output high and low power voltages is less than a second difference between the input high and low power voltages for reducing the dynamic power consumption of the output stage.Type: GrantFiled: July 9, 2008Date of Patent: January 8, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Junho Song, Chang-Ho An, Chul-Ho Choi, Min-Sung Kim, Mi-Ran Kim
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Publication number: 20100207921Abstract: A driving circuit includes a pair of first amplifiers and a pair of second amplifiers for amplifying output signal of the first amplifiers. The input signal of any one of the pair of second amplifiers is input by passing through any one of the pair of first amplifiers. The input signal of the other one of the pair of second amplifiers is input by passing through the other one of the pair of first amplifiers.Type: ApplicationFiled: February 16, 2010Publication date: August 19, 2010Inventors: Jun Ho Song, Chul Ho Choi
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Patent number: 7697628Abstract: An apparatus for transmitting data signals includes a logic unit configured to generate an encoded clock signal in response to a clock signal and a first data signal, and a demultiplexer configured to receive the encoded signal, the first data signal, and a second data signal, and to output odd-numbered data signals of the received signals at a first edge of the clock signal and even-numbered data signals of the received signals at a second edge of the clock signal. A data state elimination block is configured to receive the signals and to invert one of the received signals if logic levels of the signals are the same.Type: GrantFiled: August 10, 2006Date of Patent: April 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Chul-Ho Choi
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Publication number: 20090179876Abstract: A buffer amplifier includes an input stage and an output stage. The input stage has input high and low power voltages applied thereon for generating at least one transmission signal from an input signal. The output stage has output high and low power voltages applied thereon for generating an output signal from the at least one transmission signal. A first difference between the output high and low power voltages is less than a second difference between the input high and low power voltages for reducing the dynamic power consumption of the output stage.Type: ApplicationFiled: July 9, 2008Publication date: July 16, 2009Inventors: Junho Song, Chang-Ho An, Chul-Ho Choi, Min-Sung Kim, Mi-Ran Kim
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Publication number: 20070160155Abstract: An apparatus for transmitting data signals includes a logic unit configured to generate an encoded clock signal in response to a clock signal and a first data signal, and a demultiplexer configured to receive the encoded signal, the first data signal, and a second data signal, and to output odd-numbered data signals of the received signals at a first edge of the clock signal and even-numbered data signals of the received signals at a second edge of the clock signal. A data state elimination block is configured to receive the signals and to invert one of the received signals if logic levels of the signals are the same.Type: ApplicationFiled: August 10, 2006Publication date: July 12, 2007Inventor: Chul-Ho Choi