Patents by Inventor Yu-chol KIM
Yu-chol 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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Patent number: 11961463Abstract: A pixel connected to a first scan line includes a light-emitting element including an anode and a cathode, a first transistor including a first electrode, a second electrode, and a gate electrode connected to a first node, a first capacitor connected between the first node and a second node, a second transistor connected between the second electrode of the first transistor and the first node including a gate electrode connected to the first scan line, a third transistor including a first electrode, a second electrode connected to the second node, and a gate electrode connected to the first scan line, and a fourth transistor including a first electrode connected to a first driving voltage line, a second electrode connected to the first electrode of the first transistor, and a gate electrode connected to the first scan line.Type: GrantFiled: May 11, 2023Date of Patent: April 16, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jin-Wook Yang, Yu-Chol Kim, Donggyu Lee, Jaekeun Lim, Jae-Hyeon Jeon
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Publication number: 20240112622Abstract: A pixel includes: a light-emitting element including an anode and a cathode, a first transistor including a first and a second electrode and a gate electrode connected with a first node, a third transistor connected between the second electrode of the first transistor and the first node and including a gate electrode connected with a first scan line, a sixth transistor connected between the second electrode of the first transistor and the anode and including a gate electrode connected with a first emission line, and a seventh transistor connected between the anode and an initialization voltage line and including a gate electrode connected with a second scan line. During an initialization period, the third, sixth, and seventh transistors are turned on such that an initialization voltage from the initialization voltage line is transferred to the gate electrode of the first transistor.Type: ApplicationFiled: July 20, 2023Publication date: April 4, 2024Inventors: JIN-WOOK YANG, YU-CHOL KIM, DONGGYU LEE, JAE-HYEON JEON
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Publication number: 20240078963Abstract: A pixel connected to a first scan line includes a light-emitting element including an anode and a cathode, a first transistor including a first electrode, a second electrode, and a gate electrode connected to a first node, a first capacitor connected between the first node and a second node, a second transistor connected between the second electrode of the first transistor and the first node including a gate electrode connected to the first scan line, a third transistor including a first electrode, a second electrode connected to the second node, and a gate electrode connected to the first scan line, and a fourth transistor including a first electrode connected to a first driving voltage line, a second electrode connected to the first electrode of the first transistor, and a gate electrode connected to the first scan line.Type: ApplicationFiled: May 11, 2023Publication date: March 7, 2024Inventors: JIN-WOOK YANG, YU-CHOL KIM, DONGGYU LEE, JAEKEUN LIM, JAE-HYEON JEON
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Publication number: 20240054948Abstract: A display device includes: a display panel including pixels having light-emitting elements; a timing control unit for variably changing the driving frame frequency of the display panel according to the input frame frequency of digital video data; and a data driving unit for outputting data voltages according to the digital video data, wherein the display panel operates at a first frame frequency for a first frame period and operates at a second frame frequency, which is lower than the first frame frequency, for a second frame period, the second frame period includes a data addressing period in which a data voltage corresponding to each of the pixels is applied to the pixels, and a blank period in which no data voltage is applied to each of the pixels, and the blank period includes a period of initializing a first electrode of a light-emitting element into an initialization voltage.Type: ApplicationFiled: August 23, 2021Publication date: February 15, 2024Inventors: Ji Hye KIM, Joon Chul GOH, Yu Chol KIM, Jin Wook YANG, Ja Kyoung JIN
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Publication number: 20240038169Abstract: A display device comprises a display panel including a pixel, and a panel driver configured to receive input image data in a variable frame frequency in order to drive the display panel based on the input image data. A frame period for the display panel is divided into at least one scan period and at least one or more hold periods, and a time during which the pixel performs an anode initialization operation in each of the hold periods is longer than a time during which the pixel performs the anode initialization operation in the scan period.Type: ApplicationFiled: October 4, 2023Publication date: February 1, 2024Inventors: JIHYE KIM, YU-CHOL KIM, Seongoh Yeom, JAKYOUNG JIN
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Publication number: 20240005847Abstract: A display device includes: a pixel electrically connected to a data line, a write scan line, an initialization scan line, a compensation scan line, a transmission control line, and an emission control line; a first driving circuit configured to provide a write scan signal to the write scan line and a second driving circuit configured to receive a plurality of clock signals, each of which has a time duration of one unit horizontal period and provide an initialization scan signal, a compensation scan signal, a transmission control signal, and an emission control signal to the initialization scan line, the compensation scan line, the transmission control line, and the emission control line, respectively. Each of the initialization scan signal and the compensation scan signal has an activation interval of one unit horizontal periods or more.Type: ApplicationFiled: March 28, 2023Publication date: January 4, 2024Inventors: JIN-WOOK YANG, YU-CHOL KIM, SEHYUK PARK, DONGGYU LEE, JAE-HYEON JEON
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Patent number: 11817056Abstract: A display device comprises a display panel including a pixel, and a panel driver configured to receive input image data in a variable frame frequency in order to drive the display panel based on the input image data. A frame period for the display panel is divided into at least one scan period and at least one or more hold periods, and a time during which the pixel performs an anode initialization operation in each of the hold periods is longer than a time during which the pixel performs the anode initialization operation in the scan period.Type: GrantFiled: November 11, 2022Date of Patent: November 14, 2023Assignee: Samsung Display Co., Ltd.Inventors: Jihye Kim, Yu-Chol Kim, Seongoh Yeom, Jakyoung Jin
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Publication number: 20230215360Abstract: A display device comprises a display panel including a pixel, and a panel driver configured to receive input image data in a variable frame frequency in order to drive the display panel based on the input image data. A frame period for the display panel is divided into at least one scan period and at least one or more hold periods, and a time during which the pixel performs an anode initialization operation in each of the hold periods is longer than a time during which the pixel performs the anode initialization operation in the scan period.Type: ApplicationFiled: November 11, 2022Publication date: July 6, 2023Inventors: JIHYE KIM, YU-CHOL KIM, Seongoh Yeom, JAKYOUNG JIN
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Patent number: 11694630Abstract: A display device includes a display panel including a pixel coupled to first to fourth scan lines, an emission control line, and a data line, a scan driver which supplies a first scan signal to the first scan line, a second scan signal to the second scan line, a third scan signal to the third scan line, and a fourth scan signal to the fourth scan line, an emission driver which supplies an emission control signal to the emission control line, a data driver which supplies a data signal to the data line, and a timing controller which controls the scan driver, the emission driver, and the data driver. Each of the second and third scan signals has a gate-on level during a partial period of one frame, and is maintained at a gate-off level during a remaining period of the one frame, other than the partial period.Type: GrantFiled: July 7, 2022Date of Patent: July 4, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ja Kyoung Jin, Yu Chol Kim, Ji Hye Kim, Seong Oh Yeom
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Publication number: 20230117873Abstract: A display device includes a light-emitting device, a first transistor, and a second transistor connected between the first transistor and the light-emitting device and including a gate electrode which receives the emission control signal. When a driving frequency is a second frequency less than a first frequency, one frame includes an active period and a blank period, and during the active period, a pulse width of the emission control signal has a first value, and during the blank period, the pulse width of the emission control signal has a second value different from the first value.Type: ApplicationFiled: July 13, 2022Publication date: April 20, 2023Inventors: JIHYE KIM, YU-CHOL KIM, Seongoh YEOM, JAKYOUNG JIN
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Publication number: 20230088642Abstract: A display device includes a display panel including a pixel coupled to first to fourth scan lines, an emission control line, and a data line, a scan driver which supplies a first scan signal to the first scan line, a second scan signal to the second scan line, a third scan signal to the third scan line, and a fourth scan signal to the fourth scan line, an emission driver which supplies an emission control signal to the emission control line, a data driver which supplies a data signal to the data line, and a timing controller which controls the scan driver, the emission driver, and the data driver. Each of the second and third scan signals has a gate-on level during a partial period of one frame, and is maintained at a gate-off level during a remaining period of the one frame, other than the partial period.Type: ApplicationFiled: July 7, 2022Publication date: March 23, 2023Inventors: Ja Kyoung JIN, Yu Chol KIM, Ji Hye KIM, Seong Oh YEOM
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Patent number: 11508320Abstract: A pixel of an OLED display device includes a first capacitor, a second capacitor, a first transistor configured to generate a driving current, a second transistor configured to transfer a data voltage to a first node, a third transistor configured to diode-connect the first transistor, a fourth transistor configured to transfer an initialization voltage to the second node, a fifth transistor configured to transfer a reference voltage to the first node, a sixth transistor configured to couple a drain of the first transistor and an anode of an organic light emitting diode, a seventh transistor configured to transfer the initialization voltage to the anode of the organic light emitting diode, an eighth transistor configured to transfer the initialization voltage to the drain of the first transistor, and the organic light emitting diode.Type: GrantFiled: September 10, 2021Date of Patent: November 22, 2022Inventors: Jihye Kim, Jakyoung Jin, Yu-Chol Kim, Jin-Wook Yang
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Patent number: 11482174Abstract: An embodiment provides a display device including: a light emitting diode; a driving transistor configured to supply a current to the light emitting diode; a switching transistor having an input electrode connected to a data line; and a voltage transmitting capacitor disposed between an output electrode of the switching transistor and a gate electrode of the driving transistor, wherein a data voltage applied to the data line may be transmitted to the gate electrode of the driving transistor through the voltage transmitting capacitor, and the data voltage may have a data voltage value from which a voltage variation variable is removed based on leakage of the switching transistor.Type: GrantFiled: June 16, 2020Date of Patent: October 25, 2022Inventors: Yu-Chol Kim, Jin-Wook Yang, Ji Hye Kim, Young Ha Sohn, Jae-Hyeon Jeon
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Patent number: 11462156Abstract: The present disclosure relates to a display device and a method of driving the same. The display device includes a substrate, a display panel including a first display area including first pixels, a second display area including second pixels, and a third display area disposed between the first and second display areas and including third pixels, and a component disposed between the substrate and the display panel so as to overlap the second display area. Transmittance of the second display area is higher than transmittance of the first display area and transmittance of the third display area, and the third pixels are controlled such that a luminance gradually changes according to a distance from the second display area.Type: GrantFiled: August 24, 2020Date of Patent: October 4, 2022Inventors: Jin Wook Yang, Yu Chol Kim, Ji Hye Kim, Young Ha Sohn, Jae Hyeon Jeon
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Publication number: 20220139333Abstract: A display device includes: a pixel connected to a first scan line, a second scan line, and a data line, and including a light emitting element and a storage capacitor; and a timing controller configured to drive the pixel in a normal mode in which a driving frequency is maintained constant or a frequency variable mode according to a variable frequency signal supplied from outside, wherein in the normal mode, a first electrode voltage of the light emitting element is initialized in response to a data voltage being supplied to the storage capacitor, and wherein in the frequency variable mode, the first electrode voltage of the light emitting element is not initialized in response to the data voltage being supplied to the storage capacitor.Type: ApplicationFiled: July 1, 2021Publication date: May 5, 2022Inventors: Ja Kyoung JIN, Yu Chol KIM, Ji Hye KIM, Jin Wook YANG, Seong Oh YEOM
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Publication number: 20220139301Abstract: A display device includes pixels, and first, second, and third gate lines and data lines connected to the pixels. At least one of the pixels includes a light emitting element, a first transistor connected between a first power source and the light emitting element for driving the light emitting element according to a voltage of a first node, a second transistor connected between the first node and a corresponding data line, and driven according to a voltage of a corresponding first gate line, a capacitor connected between the first node and a second node between the first transistor and the light emitting element, a third transistor between the second node and an initialization power line, and driven according to a voltage of a corresponding second gate line, and a fourth transistor connected between the first and second nodes, and driven according to a voltage of a corresponding third gate line.Type: ApplicationFiled: September 15, 2021Publication date: May 5, 2022Inventors: Yu Chol KIM, Joon Chul GOH, Jin Wook YANG, Bong Hyun YOU
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Patent number: 11295662Abstract: A display device includes a display panel including a pixel, a voltage line supplying a power voltage to the pixel, and a reference voltage line supplying one of a reference voltage and the power voltage to the pixel; a mode selector configured to output one of a first selection signal and a second selection signal according to an operation mode of the display panel; and a switch configured to provide the reference voltage or the power voltage to the reference voltage line in response to one of the first selection signal and the second selection signal.Type: GrantFiled: March 3, 2021Date of Patent: April 5, 2022Inventors: Jae-Hyeon Jeon, Yu-Chol Kim, Jihye Kim, Jin-Wook Yang, Donggyu Lee, Jakyoung Jin
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Publication number: 20220084472Abstract: A pixel of an OLED display device includes a first capacitor, a second capacitor, a first transistor configured to generate a driving current, a second transistor configured to transfer a data voltage to a first node, a third transistor configured to diode-connect the first transistor, a fourth transistor configured to transfer an initialization voltage to the second node, a fifth transistor configured to transfer a reference voltage to the first node, a sixth transistor configured to couple a drain of the first transistor and an anode of an organic light emitting diode, a seventh transistor configured to transfer the initialization voltage to the anode of the organic light emitting diode, an eighth transistor configured to transfer the initialization voltage to the drain of the first transistor, and the organic light emitting diode.Type: ApplicationFiled: September 10, 2021Publication date: March 17, 2022Inventors: JIHYE KIM, JAKYOUNG JIN, YU-CHOL KIM, JIN-WOOK YANG
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Publication number: 20210375192Abstract: A display device includes a display panel including a pixel, a voltage line supplying a power voltage to the pixel, and a reference voltage line supplying one of a reference voltage and the power voltage to the pixel; a mode selector configured to output one of a first selection signal and a second selection signal according to an operation mode of the display panel; and a switch configured to provide the reference voltage or the power voltage to the reference voltage line in response to one of the first selection signal and the second selection signal.Type: ApplicationFiled: March 3, 2021Publication date: December 2, 2021Inventors: JAE-HYEON JEON, YU-CHOL KIM, JIHYE KIM, JIN-WOOK YANG, DONGGYU LEE, JAKYOUNG JIN
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Patent number: 11094263Abstract: A display device driving method includes: providing a reference voltage for compensating a threshold voltage of a driving transistor in a pixel; and providing a data signal to the pixel, wherein providing the reference voltage, and providing the data signal to the pixel are performed in a first frame period, and a second frame period successive to the first frame period, wherein the display device driving method further comprises providing a compensation signal generated by comparing a data signal with a reference voltage provided in a previous frame period of each frame period to the pixel before providing the reference voltage is ended.Type: GrantFiled: June 2, 2020Date of Patent: August 17, 2021Assignee: Samsung Display Co., Ltd.Inventors: Yu Chol Kim, Jin Wook Yang, Ji Hye Kim, Young Ha Sohn, Jae Hyeon Jeon