Patents by Inventor Jee-hwal Kim
Jee-hwal Kim 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: 20230078111Abstract: A gamma voltage generating circuit includes a gamma buffer configured to output a gamma voltage, a first gamma line and a second gamma line providing an output path of the gamma voltage, an output selecting unit configured to connect an output terminal of the gamma buffer to one of the first gamma line and the second gamma line, and an output resistor unit having a first resistor connected to the first gamma line and a second resistor connected to the second gamma line. The second resistor has a resistance value different from that of the first resistor.Type: ApplicationFiled: November 22, 2022Publication date: March 16, 2023Inventors: JEE HWAL KIM, Ki Ho KONG, IN Suk KIM
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Patent number: 11538433Abstract: A gamma voltage generating circuit includes a gamma buffer configured to output a gamma voltage, a first gamma line and a second gamma line providing an output path of the gamma voltage, an output selecting unit configured to connect an output terminal of the gamma buffer to one of the first gamma line and the second gamma line, and an output resistor unit having a first resistor connected to the first gamma line and a second resistor connected to the second gamma line. The second resistor has a resistance value different from that of the first resistor.Type: GrantFiled: August 2, 2021Date of Patent: December 27, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jee Hwal Kim, Ki Ho Kong, In Suk Kim
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Patent number: 11217199Abstract: Disclosed are a display driving circuit and a display apparatus including the same. A display driving circuit includes a first amplifier configured to drive a first data line of a display panel based on first pixel data and a second amplifier configured to drive a second data line of the display panel based on second pixel data, wherein, when a first data difference between the first pixel data and the second pixel data is greater than or equal to a data value indicating one grayscale and is less than or equal to a first threshold value, the second amplifier is turned off, and the first amplifier is configured to drive the first data line and the second data line based on the first pixel data and the second pixel data.Type: GrantFiled: July 16, 2020Date of Patent: January 4, 2022Assignee: Samsung Electronics Co., Ltd.Inventors: Ki-ho Kong, Taek-su Kwon, Jong-hyun Kim, Jee-hwal Kim, Jun-ho Park, Hong-keun Yune
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Publication number: 20210358448Abstract: A gamma voltage generating circuit includes a gamma buffer configured to output a gamma voltage, a first gamma line and a second gamma line providing an output path of the gamma voltage, an output selecting unit configured to connect an output terminal of the gamma buffer to one of the first gamma line and the second gamma line, and an output resistor unit having a first resistor connected to the first gamma line and a second resistor connected to the second gamma line. The second resistor has a resistance value different from that of the first resistor.Type: ApplicationFiled: August 2, 2021Publication date: November 18, 2021Inventors: Jee Hwal Kim, Ki Ho Kong, In Suk Kim
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Patent number: 11127365Abstract: A gamma voltage generating circuit includes a gamma buffer configured to output a gamma voltage, a first gamma line and a second gamma line providing an output path of the gamma voltage, an output selecting unit configured to connect an output terminal of the gamma buffer to one of the first gamma line and the second gamma line, and an output resistor unit having a first resistor connected to the first gamma line and a second resistor connected to the second gamma line. The second resistor has a resistance value different from that of the first resistor.Type: GrantFiled: November 26, 2018Date of Patent: September 21, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jee Hwal Kim, Ki Ho Kong, In Suk Kim
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Publication number: 20200349901Abstract: Disclosed are a display driving circuit and a display apparatus including the same. A display driving circuit includes a first amplifier configured to drive a first data line of a display panel based on first pixel data and a second amplifier configured to drive a second data line of the display panel based on second pixel data, wherein, when a first data difference between the first pixel data and the second pixel data is greater than or equal to a data value indicating one grayscale and is less than or equal to a first threshold value, the second amplifier is turned off, and the first amplifier is configured to drive the first data line and the second data line based on the first pixel data and the second pixel data.Type: ApplicationFiled: July 16, 2020Publication date: November 5, 2020Applicant: Samsung Electronics Co., Ltd.Inventors: Ki-ho KONG, Taek-su KWON, Jong-hyun KIM, Jee-hwal KIM, Jun-ho PARK, Hong-keun YUNE
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Patent number: 10755662Abstract: Disclosed are a display driving circuit and a display apparatus including the same. A display driving circuit includes a first amplifier configured to drive a first data line of a display panel based on first pixel data and a second amplifier configured to drive a second data line of the display panel based on second pixel data, wherein, when a first data difference between the first pixel data and the second pixel data is greater than or equal to a data value indicating one grayscale and is less than or equal to a first threshold value, the second amplifier is turned off, and the first amplifier is configured to drive the first data line and the second data line based on the first pixel data and the second pixel data.Type: GrantFiled: April 12, 2018Date of Patent: August 25, 2020Assignee: Samsung Electronics Co., Ltd.Inventors: Ki-ho Kong, Taek-su Kwon, Jong-hyun Kim, Jee-hwal Kim, Jun-ho Park, Hong-keun Yune
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Publication number: 20190340996Abstract: A gamma voltage generating circuit includes a gamma buffer configured to output a gamma voltage, a first gamma line and a second gamma line providing an output path of the gamma voltage, an output selecting unit configured to connect an output terminal of the gamma buffer to one of the first gamma line and the second gamma line, and an output resistor unit having a first resistor connected to the first gamma line and a second resistor connected to the second gamma line. The second resistor has a resistance value different from that of the first resistor.Type: ApplicationFiled: November 26, 2018Publication date: November 7, 2019Inventors: Jee Hwal Kim, Ki Ho Kong, In Suk Kim
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Publication number: 20190087620Abstract: An electronic device includes a display panel, a gamma circuit, a driving circuit, and a fingerprint recognition sensor. The gamma circuit generates a first set of gray voltages in a normal operation mode and a fingerprint recognition voltage corresponding to a brightness higher than a maximum gray voltage among the first set of gray voltages. The driving circuit displays an image on the display panel based on the first set of gray voltages in the normal operation mode and a fingerprint recognition window on a portion of the display panel based on the fingerprint recognition voltage in the fingerprint recognition mode. The fingerprint recognition sensor recognizes a fingerprint based on reflected light of the fingerprint received through the fingerprint recognition window.Type: ApplicationFiled: April 3, 2018Publication date: March 21, 2019Inventors: Jee-Hwal Kim, Seung-Jae LEE, Dong-Hui Kim, Hong-Kook Lee
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Patent number: 10199005Abstract: A display driving circuit and a display device including the display driving circuit are disclosed. The display driving circuit includes: a data driver including a first channel amplifier operating based on first pixel data and a second channel amplifier operating based on second pixel data and configured to drive first and second pixels of a display panel based on the first pixel data and the second pixel data of a first line; and a data comparator configured to compare the first pixel data with the second pixel data and determine operation states of the first channel amplifier and the second channel amplifier on a comparison result, before a first horizontal period in which the first pixel and the second pixel are driven.Type: GrantFiled: March 24, 2017Date of Patent: February 5, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Ki-ho Kong, Hong-keun Yune, Jee-hwal Kim, Jin-hong Hwang, Seung-hyun An, Yang-hyo Kim
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Publication number: 20180315390Abstract: Disclosed are a display driving circuit and a display apparatus including the same. A display driving circuit includes a first amplifier configured to drive a first data line of a display panel based on first pixel data and a second amplifier configured to drive a second data line of the display panel based on second pixel data, wherein, when a first data difference between the first pixel data and the second pixel data is greater than or equal to a data value indicating one grayscale and is less than or equal to a first threshold value, the second amplifier is turned off, and the first amplifier is configured to drive the first data line and the second data line based on the first pixel data and the second pixel data.Type: ApplicationFiled: April 12, 2018Publication date: November 1, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Ki-ho KONG, Taek-su KWON, Jong-hyun KIM, Jee-hwal KIM, Jun-ho PARK, Hong-Keun YUNE
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Patent number: 10078980Abstract: A data driver and a display driving circuit are provided. The display driving circuit includes a first gamma voltage generator that supplies a first gamma voltage set, a second gamma voltage generator that supplies a second gamma voltage set, a first channel driver that outputs a selected one of gamma voltages of the first gamma voltage set, and a second channel driver that outputs a selected one of gamma voltages of the second gamma voltage set. In a first operation mode, the first channel driver and the second channel driver respectively drive a first data line and a second data line of a display panel, and in a second operation mode, the second gamma voltage generator and the second channel driver are disabled, and the first channel driver time-divisionally drives the first data line and the second data line, based on the first gamma voltage set.Type: GrantFiled: April 25, 2017Date of Patent: September 18, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ki-ho Kong, Hong-keun Yune, Jee-hwal Kim
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Patent number: 9997095Abstract: A display apparatus includes a display driving circuit and a controller. The display driving circuit includes a data driver to sequentially drive a plurality of pixel groups during one horizontal period in a time-division manner. The pixel groups are included in each of the horizontal lines of a display panel. The controller analyzes a pattern of received image data and determines a driving sequence of the plurality of pixel groups of each horizontal line based on a result of the analysis of the pattern of received image data.Type: GrantFiled: July 22, 2016Date of Patent: June 12, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Jee-hwal Kim
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Publication number: 20180075817Abstract: A display driver integrated circuit (DDI) for driving a display panel is provided. The DDI is implemented as a single semiconductor chip including a driver circuit and a switching circuit. The driver circuit outputs image signals to be displayed on pixel groups connected to one gate line of a display panel to a plurality of channels during one horizontal time period. The switching circuit selectively connects each of the plurality of channels to data lines of a corresponding pixel group according to a selection signal indicating a display order of the pixel groups and provides the image signals to selected data lines.Type: ApplicationFiled: August 24, 2017Publication date: March 15, 2018Inventors: Jee-hwal Kim, Ki-ho Kong
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Publication number: 20170309219Abstract: A data driver and a display driving circuit are provided. The display driving circuit includes a first gamma voltage generator that supplies a first gamma voltage set, a second gamma voltage generator that supplies a second gamma voltage set, a first channel driver that outputs a selected one of gamma voltages of the first gamma voltage set, and a second channel driver that outputs a selected one of gamma voltages of the second gamma voltage set. In a first operation mode, the first channel driver and the second channel driver respectively drive a first data line and a second data line of a display panel, and in a second operation mode, the second gamma voltage generator and the second channel driver are disabled, and the first channel driver time-divisionally drives the first data line and the second data line, based on the first gamma voltage set.Type: ApplicationFiled: April 25, 2017Publication date: October 26, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ki-ho KONG, Hong-keun YUNE, Jee-hwal KIM
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Publication number: 20170287429Abstract: A display driving circuit and a display device including the display driving circuit are disclosed. The display driving circuit includes: a data driver including a first channel amplifier operating based on first pixel data and a second channel amplifier operating based on second pixel data and configured to drive first and second pixels of a display panel based on the first pixel data and the second pixel data of a first line; and a data comparator configured to compare the first pixel data with the second pixel data and determine operation states of the first channel amplifier and the second channel amplifier on a comparison result, before a first horizontal period in which the first pixel and the second pixel are driven.Type: ApplicationFiled: March 24, 2017Publication date: October 5, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Ki-ho KONG, Hong-keun Yune, Jee-hwal Kim, Jin-hong Hwang, Seung-hyun An, Yang-hyo Kim
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Publication number: 20170061928Abstract: A display apparatus includes a display driving circuit and a controller. The display driving circuit includes a data driver to sequentially drive a plurality of pixel groups during one horizontal period in a time-division manner. The pixel groups are included in each of the horizontal lines of a display panel. The controller analyzes a pattern of received image data and determines a driving sequence of the plurality of pixel groups of each horizontal line based on a result of the analysis of the pattern of received image data.Type: ApplicationFiled: July 22, 2016Publication date: March 2, 2017Inventor: Jee-hwal KIM
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Publication number: 20100295835Abstract: Provided are a voltage boosting circuit and a display device including the same. The voltage boosting circuit includes a booster input voltage generator configured to receive a power supply voltage, operate with a first current drive capability, and generate a booster input voltage in a switched mode in which the voltage boosting circuit switches from a standby mode to an operation mode, and configured to receive the power supply voltage, operate with a second current drive capability higher than the first current drive capability, and generate the booster input voltage in the operation mode, and a booster configured to receive the booster input voltage and generate a boost voltage.Type: ApplicationFiled: February 18, 2010Publication date: November 25, 2010Inventors: Jee-Hwal Kim, Ji-Hyun Lee
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Patent number: 7737939Abstract: A display driving integrated circuit (IC) and a display driving method for supporting various driving mode include an input unit, a digital-analog converter and a row data output unit. The row data output unit outputs at least one of the row data to a row line corresponding thereto for each row scan clock pulse. The row data output unit activates output paths for outputting the row data to the row lines in an activation order of a driving mode selected from a plurality of driving modes having different orders of activating the output paths in response to a mode select signal.Type: GrantFiled: November 30, 2006Date of Patent: June 15, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-hyuk Shin, Jae-youn Lee, Jee-hwal Kim
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Publication number: 20070165014Abstract: A display driving integrated circuit (IC) and a display driving method for supporting various driving mode include an input unit, a digital-analog converter and a row data output unit. The row data output unit outputs at least one of the row data to a row line corresponding thereto for each row scan clock pulse. The row data output unit activates output paths for outputting the row data to the row lines in an activation order of a driving mode selected from a plurality of driving modes having different orders of activating the output paths in response to a mode select signal.Type: ApplicationFiled: November 30, 2006Publication date: July 19, 2007Inventors: Dong-hyuk Shin, Jae-youn Lee, Jee-hwal Kim