Patents by Inventor Hee-Sun Ahn
Hee-Sun Ahn 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: 11150691Abstract: A display device includes a panel part and a protective window on the panel part. The panel part includes a base substrate, a supporting film disposed below the base substrate, a driving element disposed on the base substrate, the driving element including an active pattern, and a UV-blocking member disposed below the driving element.Type: GrantFiled: April 20, 2020Date of Patent: October 19, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hyungjun Lim, Hee Sun Ahn
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Publication number: 20200393872Abstract: A display device includes a panel part and a protective window on the panel part. The panel part includes a base substrate, a supporting film disposed below the base substrate, a driving element disposed on the base substrate, the driving element including an active pattern, and a UV-blocking member disposed below the driving element.Type: ApplicationFiled: April 20, 2020Publication date: December 17, 2020Applicant: Samsung Display Co., LTD.Inventors: Hyungjun LIM, Hee Sun AHN
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Patent number: 10163386Abstract: Disclosed is a display device that can rapidly recover from a fail situation. The display device includes: a display panel; a source drive IC configured to supply a data signal to the display panel and including a calibrating unit; a timing controller configured to supply a data control signal and a frame data to the source drive IC; and a common bus line formed between the source drive IC and the timing controller. The calibrating unit sets and stores a calibration value in response to the data control signal during an initialization period before receiving the frame data from the timing controller, and transmits the calibration value to the timing controller through the common bus line.Type: GrantFiled: May 19, 2016Date of Patent: December 25, 2018Assignee: Samsung Display Co., Ltd.Inventors: Dong Gyu Lee, Seon Ki Kim, Kyung Youl Min, Hee Sun Ahn
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Patent number: 10044366Abstract: A non-linear gamma compensation current mode digital-analog converter includes: a first digital-analog converter block configured to: receive a digital signal, a first reference voltage, and a gamma adjustment voltage, and provide a reference current to a ground, wherein a first current flowing to a first current output terminal is determined according to the digital signal and the gamma adjustment voltage; and a second digital-analog converter block configured to: receive the digital signal, a second reference voltage, and a ground voltage, and provide the first current to the first digital-analog converter, wherein a second current flowing to a second current output terminal is determined according to the digital signal and the first current.Type: GrantFiled: March 18, 2014Date of Patent: August 7, 2018Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Oh Jo Kwon, Kyung Youl Min, Choong Sun Shin, Hee Sun Ahn, Hyun Sik Kim, Jun Suk Bang, Gyu Hyeong Cho
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Patent number: 9779665Abstract: A gate driver for a display device and a display device including the same are disclosed. In one aspect, the gate driver includes first through N-th scan drivers configured to respectively output first through N-th scan signals, where N is an integer greater than 1. The gate driver also includes first through N-th sensing drivers configured to respectively output first through N-th sensing signals, wherein an M-th one of the first through N-th sensing drivers is configured to activate an M-th one of the first through N-th sensing signals K times during an active period of an (M+1)-th one of the first through N-th scan signals, where M is an integer greater than 0 and less than N and K is an integer greater than 1.Type: GrantFiled: August 26, 2015Date of Patent: October 3, 2017Assignee: Samsung Display Co., Ltd.Inventors: Jun-Yong Song, Oh-Jo Kwon, Ji-Woong Kim, Choong-Sun Shin, Hee-Sun Ahn
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Patent number: 9691329Abstract: An organic light emitting display device includes pixels positioned at crossing regions between data lines and scan lines, each of the pixels including an organic light emitting diode, a scan driver configured to supply a scan signal to scan lines, a data driver configured to drive the data lines, wherein the data driver includes, in each channel, a supply part comprising a digital-to-analog converter configured to generate data signals using second data supplied from outside in a driving period, and a deterioration part configured to measure deterioration information of the organic light emitting diode using the digital-to-analog converter in a sensing period.Type: GrantFiled: June 27, 2013Date of Patent: June 27, 2017Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Oh-Jo Kwon, Won-Tae Choi, Hee-Sun Ahn, Bo-Yeon Kim, Gyu-Hyeong Cho, Hyun-Sik Kim, Jun-Suk Bang
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Publication number: 20170069257Abstract: Disclosed is a display device that can rapidly recover from a fail situation. The display device includes: a display panel; a source drive IC configured to supply a data signal to the display panel and including a calibrating unit; a timing controller configured to supply a data control signal and a frame data to the source drive IC; and a common bus line formed between the source drive IC and the timing controller. The calibrating unit sets and stores a calibration value in response to the data control signal during an initialization period before receiving the frame data from the timing controller, and transmits the calibration value to the timing controller through the common bus line.Type: ApplicationFiled: May 19, 2016Publication date: March 9, 2017Inventors: Dong Gyu LEE, Seon Ki KIM, Kyung Youl MIN, Hee Sun AHN
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Patent number: 9576536Abstract: A display device according to an embodiment of the present invention includes: a pixel configured to emit light according to a data signal supplied to a data line, a power source voltage supplier configured to supply a power source voltage to the pixel, a driving transistor configured to drive the pixel to be emitted according to the data signal and the power source voltage, and a sensor configured to supply a test signal to a data line and to detect a sensing current flowing to the data line through the driving transistor according to the test signal.Type: GrantFiled: March 18, 2014Date of Patent: February 21, 2017Assignees: Samsung Display Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Oh Jo Kwon, Kyung Youl Min, Choong Sun Shin, Hee Sun Ahn, Hyun Sik Kim, Jun Suk Bang, Gyu Hyeong Cho
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Patent number: 9485081Abstract: An apparatus for compensating for a skew is provided between data signals supplied through a plurality of data lines and a clock signal supplied through a clock line. A skew compensation apparatus includes a plurality of data receivers each configured to delay a data signal supplied through a corresponding data line based on associated phase difference data and to output the delayed data signal, a clock receiver configured to receive a clock signal supplied through a clock line, and a phase controller configured to select any one of the plurality of data receivers and to output, to the selected data receiver, a phase control signal configured to correct the phase difference data of the selected data receiver based on the phase difference between a data signal output from the selected data receiver and the clock signal.Type: GrantFiled: March 12, 2014Date of Patent: November 1, 2016Assignee: Samsung Display Co., Ltd.Inventors: Hee-Sun Ahn, Jae-Goo Lee, Choong-Sun Shin, Young-Uk Won, In-Bok Song
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Patent number: 9450567Abstract: A noise-removing circuit includes a first capacitor to charge a first voltage supplied to a first node during a first period in which a first switching control signal is supplied, a second capacitor to charge a second voltage supplied to a third node during the first period, a third capacitor to charge the first voltage during a second period in which a second switching control signal is supplied, and to charge the second voltage charged in the second capacitor as a third voltage during a third period in which a third switching control signal is supplied, a fourth capacitor to charge the second voltage during the second period, and to charge the first voltage charged in the first capacitor as a fourth voltage during the third period, and a differential amplifier to output a voltage difference between the third voltage and the fourth voltage.Type: GrantFiled: August 12, 2014Date of Patent: September 20, 2016Assignee: Samsung Display Co., Ltd.Inventors: Oh-Jo Kwon, Boo-Dong Kwak, Choong-Sun Shin, Hee-Sun Ahn
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Patent number: 9424770Abstract: An error compensator and an organic light emitting display device using the same. The organic light emitting display device includes pixels each having a driving transistor and an organic light emitting diode; and a sensing unit extracting at least one of a first information including the threshold voltage of the driving transistor or a second information including the degradation of the organic light emitting diode from a pixel of the pixels. In the organic light emitting display device, the sensing unit includes an amplifier amplifying a voltage corresponding to the at least one of the first information or the second information; and an error compensator compensating for error components of elements included in the amplifier and the error compensator.Type: GrantFiled: July 12, 2013Date of Patent: August 23, 2016Assignee: Samsung Display Co., Ltd.Inventors: Bo-Yeon Kim, Oh-Jo Kwon, Hee-Sun Ahn
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Publication number: 20160240144Abstract: A gate driver for a display device and a display device including the same are disclosed. In one aspect, the gate driver includes first through N-th scan drivers configured to respectively output first through N-th scan signals, where N is an integer greater than 1. The gate driver also includes first through N-th sensing drivers configured to respectively output first through N-th sensing signals, wherein an M-th one of the first through N-th sensing drivers is configured to activate an M-th one of the first through N-th sensing signals K times during an active period of an (M+1)-th one of the first through N-th scan signals, where M is an integer greater than 0 and less than N and K is an integer greater than 1.Type: ApplicationFiled: August 26, 2015Publication date: August 18, 2016Inventors: Jun-Yong Song, Oh-Jo Kwon, Ji-Woong Kim, Choong-Sun Shin, Hee-Sun Ahn
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Patent number: 9354647Abstract: A current generating circuit includes a reference voltage generating unit, a clock signal generating unit, a reference current generating unit, and a current mirror unit. The reference voltage generating unit generates a first reference voltage and a second reference voltage. The clock signal generating unit generates clock signals. The reference current generating unit generates a reference current corresponding to a selection signal based on the first reference voltage. The current mirror unit supplies a first current and a second current based on the reference current. A capacitor charges voltage based on the second current. A selection signal generating unit counts clock signals during a period in which a voltage charged in the capacitor is less than the second reference voltage, and outputs the selection signal based on the counted result.Type: GrantFiled: July 28, 2014Date of Patent: May 31, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Bo-Yeon Kim, Hee-Sun Ahn
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Patent number: 9019180Abstract: A display device including pixels; a leakage current compensator connected to at least one of data lines connected to the pixels; and an integrator connected to the leakage current compensator. The leakage current compensator is configured to store a voltage that corresponds to a leakage current that flows to the at least one data line, and to flow the leakage current to ground from the at least one data line according to a voltage that corresponds to the leakage current. The integrator is configured to receive a pixel current generated by subtracting the leakage current from a measurement current that flows to the at least one data line, and to output a difference value between a pixel voltage that corresponds to the pixel current and a reference voltage.Type: GrantFiled: January 22, 2014Date of Patent: April 28, 2015Assignee: Samsung Display Co., Ltd.Inventors: Hee Sun Ahn, Oh Jo Kwon, Kyung Youl Min
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Publication number: 20150103062Abstract: A display device according to an embodiment of the present invention includes: a pixel configured to emit light according to a data signal supplied to a data line, a power source voltage supplier configured to supply a power source voltage to the pixel, a driving transistor configured to drive the pixel to be emitted according to the data signal and the power source voltage, and a sensor configured to supply a test signal to a data line and to detect a sensing current flowing to the data line through the driving transistor according to the test signal.Type: ApplicationFiled: March 18, 2014Publication date: April 16, 2015Applicants: Korea Advanced Institute of Science and Technology, Samsung Display Co., Ltd.Inventors: Oh Jo Kwon, Kyung Youl Min, Choong Sun Shin, Hee Sun Ahn, Hyun Sik Kim, Jun Suk Bang, Gyu Hyeong Cho
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Publication number: 20150091784Abstract: A non-linear gamma compensation current mode digital-analog converter includes: a first digital-analog converter block configured to: receive a digital signal, a first reference voltage, and a gamma adjustment voltage, and provide a reference current to a ground, wherein a first current flowing to a first current output terminal is determined according to the digital signal and the gamma adjustment voltage; and a second digital-analog converter block configured to: receive the digital signal, a second reference voltage, and a ground voltage, and provide the first current to the first digital-analog converter, wherein a second current flowing to a second current output terminal is determined according to the digital signal and the first current.Type: ApplicationFiled: March 18, 2014Publication date: April 2, 2015Applicants: Korea Advanced Institute of Science and Technology, Samsung Display Co., Ltd.Inventors: Oh Jo Kwon, Kyung Youl Min, Choong Sun Shin, Hee Sun Ahn, Hyun Sik Kim, Jun Suk Bang, Gyu Hyeong Cho
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Publication number: 20150070339Abstract: A display device including pixels; a leakage current compensator connected to at least one of data lines connected to the pixels; and an integrator connected to the leakage current compensator. The leakage current compensator is configured to store a voltage that corresponds to a leakage current that flows to the at least one data line, and to flow the leakage current to ground from the at least one data line according to a voltage that corresponds to the leakage current. The integrator is configured to receive a pixel current generated by subtracting the leakage current from a measurement current that flows to the at least one data line, and to output a difference value between a pixel voltage that corresponds to the pixel current and a reference voltage.Type: ApplicationFiled: January 22, 2014Publication date: March 12, 2015Applicant: Samsung Display Co., Ltd.Inventors: Hee Sun Ahn, Oh Jo Kwon, Kyung Youl Min
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Publication number: 20150054666Abstract: A current memory cell includes an amplifier, transistor, first and second capacitors, and first to third switching units. The amplifier includes first to third terminals. The transistor is coupled to first and second nodes, and ground. The first capacitor is coupled between the second node and ground. The second capacitor is coupled between a third node and ground. The first unit couples a current source to the first node during a first period and an output line to the first node during a second period. The second unit couples the first node to the second node during the first period. The third unit couples the first terminal to the second node and couples the second and third terminals to the third node during the first period, and couples the first terminal to the third node and couples the second and third terminals to the second node during the second period.Type: ApplicationFiled: March 13, 2014Publication date: February 26, 2015Applicant: Samsung Display Co., Ltd.Inventors: Bo-Yeon Kim, Oh-Jo Kwon, Hee-Sun Ahn, Won-Tae Choi
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Publication number: 20150048881Abstract: A noise-removing circuit includes a first capacitor to charge a first voltage supplied to a first node during a first period in which a first switching control signal is supplied, a second capacitor to charge a second voltage supplied to a third node during the first period, a third capacitor to charge the first voltage during a second period in which a second switching control signal is supplied, and to charge the second voltage charged in the second capacitor as a third voltage during a third period in which a third switching control signal is supplied, a fourth capacitor to charge the second voltage during the second period, and to charge the first voltage charged in the first capacitor as a fourth voltage during the third period, and a differential amplifier to output a voltage difference between the third voltage and the fourth voltage.Type: ApplicationFiled: August 12, 2014Publication date: February 19, 2015Inventors: Oh-Jo Kwon, Boo-Dong Kwak, Choong-Sun Shin, Hee-Sun Ahn
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Patent number: 8957799Abstract: A current memory cell includes an amplifier, transistor, first and second capacitors, and first to third switching units. The amplifier includes first to third terminals. The transistor is coupled to first and second nodes, and ground. The first capacitor is coupled between the second node and ground. The second capacitor is coupled between a third node and ground. The first unit couples a current source to the first node during a first period and an output line to the first node during a second period. The second unit couples the first node to the second node during the first period. The third unit couples the first terminal to the second node and couples the second and third terminals to the third node during the first period, and couples the first terminal to the third node and couples the second and third terminals to the second node during the second period.Type: GrantFiled: March 13, 2014Date of Patent: February 17, 2015Assignee: Samsung Display Co., Ltd.Inventors: Bo-Yeon Kim, Oh-Jo Kwon, Hee-Sun Ahn, Won-Tae Choi