Patents by Inventor Oh Jo Kwon
Oh Jo Kwon 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: 20250265972Abstract: A display device includes a data driver for supplying a reference voltage and a plurality of data signals to each of output lines, a divider including demultiplexers for supplying the reference voltage and the plurality of data signals, which are supplied from the each of the output lines, to a plurality of data lines, corresponding to control signals, a timing controller for supplying the control signals, and pixels connected to scan lines and the data lines. The pixels located on at least two different horizontal lines are simultaneously supplied with the reference voltage.Type: ApplicationFiled: December 11, 2024Publication date: August 21, 2025Applicant: Samsung Display Co., LTD.Inventors: Seong Joo LEE, Oh Jo KWON, Jae Sang KIM
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Patent number: 12394366Abstract: According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.Type: GrantFiled: February 29, 2024Date of Patent: August 19, 2025Assignee: Samsung Display Co., Ltd.Inventors: Sang Hyun Heo, Joon Chul Goh, Oh Jo Kwon, Dong Soo Kim, Hyung Gun Ma, Jung Hun Yi
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Patent number: 12260800Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.Type: GrantFiled: March 20, 2024Date of Patent: March 25, 2025Assignee: Samsung Display Co., Ltd.Inventors: Sang Hyun Heo, Joon Chul Goh, Oh Jo Kwon, Dong Soo Kim, Hyung Gun Ma, Jung Hun Yi
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Publication number: 20250006097Abstract: A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.Type: ApplicationFiled: March 20, 2024Publication date: January 2, 2025Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
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Publication number: 20240395192Abstract: According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.Type: ApplicationFiled: February 29, 2024Publication date: November 28, 2024Inventors: Sang Hyun HEO, Joon Chul GOH, Oh Jo KWON, Dong Soo KIM, Hyung Gun MA, Jung Hun YI
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Patent number: 12130987Abstract: A sensor device including: first sensors; second sensors configured to form capacitances with the first sensors; a sensor transmitter connected to the first sensors and configured to supply driving signals having a first frequency to the first sensors; and a sensor receiver connected to the second sensors and configured to receive sensing signals from the second sensors, wherein the sensor receiver includes: a multipath filter having a center frequency set to the first frequency; and a first chopper integrator connected to the multipath filter, and having a center frequency set to the first frequency.Type: GrantFiled: December 6, 2022Date of Patent: October 29, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Keum Dong Jung, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Seong An Park, Sang Hyun Heo
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Publication number: 20240241598Abstract: A touch detection device supplies driving signals generated based on orthogonal carriers and a CDMA scheme to driving electrodes. A touch driving circuit drives the driving electrodes in groups including a first group and a second group, supplies first driving signals based on a designated first frequency and first orthogonal codes set to correspond to the driving electrodes of the first group, respectively, to the driving electrodes of the first group, and supplies second multiple driving signals based on a second frequency orthogonal to the first frequency and second orthogonal codes set to correspond to the driving electrodes of the second group, respectively, to the driving electrodes of the second group.Type: ApplicationFiled: September 19, 2023Publication date: July 18, 2024Inventors: Ji Woong KIM, Kang Yoon LEE, Oh Jo KWON, Dong Gyu KIM, Chang Hyeon KIM
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Patent number: 11947764Abstract: An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.Type: GrantFiled: May 23, 2022Date of Patent: April 2, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ji Woong Kim, Oh Jo Kwon, Kyung Tea Park, Keum Dong Jung, Sang Hyun Heo
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Patent number: 11908422Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.Type: GrantFiled: November 14, 2022Date of Patent: February 20, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
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Patent number: 11900870Abstract: A display device includes: a display panel including a plurality of pixels; a scan driver connected to the plurality of pixels through a plurality of scan lines; a data driver connected to the plurality of pixels through a plurality of data lines; an emission driver connected to the plurality of pixels through a plurality of emission control lines; a sensing circuit connected to the plurality of pixels through a plurality of sensing lines; and a controller configured to control the scan driver, the data driver, the emission driver and the sensing circuit, wherein, in an active period of each frame period, the scan driver sequentially applies a sensing pulse and a scan pulse to at least one scan line of the plurality of scan lines, and applies the scan pulse to remaining scan lines of the plurality of scan lines.Type: GrantFiled: October 25, 2021Date of Patent: February 13, 2024Assignee: Samsung Display Co., Ltd.Inventors: Hyungryul Kang, Oh Jo Kwon, Yoshimura Hideo, Bong-Hyun You, Jaekeun Lim
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Patent number: 11837132Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.Type: GrantFiled: October 13, 2021Date of Patent: December 5, 2023Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Seong Joo Lee, Seok Tae Koh, Gyeong Gu Kang, Oh Jo Kwon, Hyun Sik Kim, Gyu Wan Lim, Keum Dong Jung
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Publication number: 20230305657Abstract: A sensor device including: first sensors; second sensors configured to form capacitances with the first sensors; a sensor transmitter connected to the first sensors and configured to supply driving signals having a first frequency to the first sensors; and a sensor receiver connected to the second sensors and configured to receive sensing signals from the second sensors, wherein the sensor receiver includes: a multipath filter having a center frequency set to the first frequency; and a first chopper integrator connected to the multipath filter, and having a center frequency set to the first frequency.Type: ApplicationFiled: December 6, 2022Publication date: September 28, 2023Inventors: Keum Dong JUNG, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Seong An Park, Sang Hyun Heo
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Patent number: 11705046Abstract: A data driver includes a multi-channel sample/hold circuit electrically connected between a digital-to-analog converter and a data buffer. The multi-channel sample/hold circuit includes a first sample/hold circuit connected to a first channel and a second sample/hold circuit connected to a second channel. The first sample/hold circuit performs a first drive operation and a second drive operation. The first drive operation includes sampling a data voltage as a buffer input voltage and maintaining the buffer input voltage during an nth horizontal time. The second drive operation includes outputting the buffer input voltage to an output terminal of the buffer during an (n+1)th horizontal time. The second sample/hold circuit performs the second drive operation during the nth horizontal time and performs the first drive operation during the (n+1)th horizontal time.Type: GrantFiled: September 10, 2021Date of Patent: July 18, 2023Assignees: SAMSUNG DISPLAY CO., LTD., KOREA UNIVERSITY RESEARCH & BUSINESS FOUNDATIONInventors: Young Soo Hwang, Joon Chul Goh, Oh Jo Kwon, Ki Duk Kim, Jeong Min Kim, Bong Hyun You, Hyung Min Lee, Seung Hun Choi
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Publication number: 20230073395Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.Type: ApplicationFiled: November 14, 2022Publication date: March 9, 2023Inventors: Hyung Gun MA, Oh Jo KWON, Ji Woong KIM, Jun Yong SONG, Seong Joo LEE, Sang Hyun HEO
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Publication number: 20230051918Abstract: An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating, unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.Type: ApplicationFiled: May 23, 2022Publication date: February 16, 2023Inventors: Ji Woong KIM, Oh Jo KWON, Kyung Tea PARK, Keum Dong JUNG, Sang Hyun HEO
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Patent number: 11508290Abstract: A pixel according to some embodiments includes a light source unit, a first transistor coupled between a first power source and a first node, and configured to control a driving current applied to the light source unit, a first bias transistor coupled between a first bias power source and a gate electrode of the first transistor, and a second bias transistor coupled between a second bias power source and a second node that is electrically coupled to an anode of the light source unit, wherein the first bias transistor and the second bias transistor are configured to be turned on during a first period before a data voltage is applied among one frame, and wherein the second bias transistor is configured to be turned on at least once during a second period after the data voltage is applied among the one frame.Type: GrantFiled: May 24, 2021Date of Patent: November 22, 2022Assignee: Samsung Display Co., Ltd.Inventors: Yun Ki Baek, Oh Jo Kwon, Bong Hyun You, Seok Ha Hong
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Patent number: 11501718Abstract: A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.Type: GrantFiled: February 3, 2021Date of Patent: November 15, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyung Gun Ma, Oh Jo Kwon, Ji Woong Kim, Jun Yong Song, Seong Joo Lee, Sang Hyun Heo
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Publication number: 20220335871Abstract: An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.Type: ApplicationFiled: October 13, 2021Publication date: October 20, 2022Inventors: Seong Joo LEE, Seok Tae KOH, Gyeong Gu KANG, Oh Jo KWON, Hyun Sik KIM, Gyu Wan LIM, Keum Dong JUNG
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Patent number: 11322096Abstract: A data driver includes: a signal generator which includes a staircase waveform gray voltage signal generator which generate a plurality of staircase waveform gray voltage signals using a lowest gamma reference voltage, a highest gamma reference voltage, and a plurality of gamma voltages having a magnitude between the lowest gamma reference voltage and the highest gamma reference voltage; and a channel driver which includes a decoder which output one staircase waveform gray voltage signal selected from the staircase waveform gray voltage signals, an output circuit which output a gray voltage corresponding to the selected staircase waveform gray voltage signal, and a reset unit which supplies one of the gamma voltages to the output circuit as a reset voltage.Type: GrantFiled: March 10, 2021Date of Patent: May 3, 2022Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Seong Joo Lee, Oh Jo Kwon, Ji Woong Kim, Hyung Gun Ma, Jun Yong Song, Sang Hyun Heo
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Publication number: 20220122513Abstract: A data driver includes a multi-channel sample/hold circuit electrically connected between a digital-to-analog converter and a data buffer. The multi-channel sample/hold circuit includes a first sample/hold circuit connected to a first channel and a second sample/hold circuit connected to a second channel. The first sample/hold circuit performs a first drive operation and a second drive operation. The first drive operation includes sampling a data voltage as a buffer input voltage and maintaining the buffer input voltage during an nth horizontal time. The second drive operation includes outputting the buffer input voltage to an output terminal of the buffer during an (n+1)th horizontal time. The second sample/hold circuit performs the second drive operation during the nth horizontal time and performs the first drive operation during the (n+1)th horizontal time.Type: ApplicationFiled: September 10, 2021Publication date: April 21, 2022Inventors: YOUNG SOO HWANG, Joon Chul Goh, Oh Jo Kwon, Ki Duk Kim, Jeong Min Kim, Bong Hyun You, Hyung Min Lee, Seung Hun Choi