Patents by Inventor Kohei Ebisuno
Kohei Ebisuno 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: 20210175317Abstract: A display apparatus includes a base substrate including a display area in which an image is displayed and a peripheral area adjacent to the display area, a source/drain pattern on the base substrate, the source/drain pattern including a connecting electrode in a pad portion of the peripheral area and a electrode of a thin film transistor in the display area, a planarization insulation layer on the base substrate, the planarization insulation layer contacting a side surface of the connecting electrode and a side surface of the electrode of the thin film transistor, and exposing a top surface of the connecting electrode, a connecting member contacting the connecting electrode, and a driving member including a driving circuit, the driving member being connected to the connecting member.Type: ApplicationFiled: February 17, 2021Publication date: June 10, 2021Applicant: Samsung Display Co., LTD.Inventors: Dong Hyun SON, Sung Hoon MOON, Sung Jun KIM, Kohei EBISUNO, Deok Hoi KIM, Sanghoon OH
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Patent number: 10978537Abstract: An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, a plurality of transmissive windows spaced apart from the pixels, and a light blocking member disposed between one of the pixels and one of the transmissive windows. The pixels display an image, and light is transmitted through the transmissive windows. Each pixel includes a transistor including a plurality of electrode members disposed in different layers on the substrate. The light blocking member includes a plurality of light blocking sub-members respectively disposed in the same layers as the plurality of electrode members.Type: GrantFiled: May 1, 2017Date of Patent: April 13, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kohei Ebisuno, Yong Ho Yang, Jun Hee Lee, Nak Cho Choi
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Patent number: 10950681Abstract: A display apparatus includes a base substrate including a display area in which an image is displayed and a peripheral area adjacent to the display area, a source/drain pattern on the base substrate, the source/drain pattern including a connecting electrode in a pad portion of the peripheral area and a electrode of a thin film transistor in the display area, a planarization insulation layer on the base substrate, the planarization insulation layer contacting a side surface of the connecting electrode and a side surface of the electrode of the thin film transistor, and exposing a top surface of the connecting electrode, a connecting member contacting the connecting electrode, and a driving member including a driving circuit, the driving member being connected to the connecting member.Type: GrantFiled: September 24, 2019Date of Patent: March 16, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Dong Hyun Son, Sung Hoon Moon, Sung Jun Kim, Kohei Ebisuno, Deok Hoi Kim, Sanghoon Oh
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Patent number: 10854645Abstract: A method for fabricating a thin film transistor substrate includes forming a buffer layer including at least one film on a base substrate, planarizing a surface of the buffer layer, and forming a thin film transistor on the buffer layer.Type: GrantFiled: February 12, 2019Date of Patent: December 1, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jun Hee Lee, Sung Hoon Moon, Dong Hyun Son, Pil Soo Ahn, Kohei Ebisuno, Sang Hoon Oh
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Publication number: 20200243632Abstract: A display device includes a scan line that extends in a first direction on a substrate and that transmits a scan signal; a data line that extends in a second direction that intersects the first direction and that transmits a data signal; a driving voltage line that extends in the second direction and that transmits a driving voltage; a transistor that includes a second transistor connected to the scan line and the data line and a first transistor connected to the second transistor; a light emitting device connected to the transistor; and a conductive pattern disposed between the substrate and the first transistor, where each of the first and second transistors includes an active pattern with a stacked first semiconductor layer and a second semiconductor layer, which have different crystalline states.Type: ApplicationFiled: April 8, 2020Publication date: July 30, 2020Inventors: JUN HEE LEE, IN JUN BAE, KOHEI EBISUNO
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Publication number: 20200185537Abstract: A thin film transistor includes an active layer including a first portion having a first thickness and a second portion having a second thickness greater than the first thickness, a capping layer filling a thickness difference between the first portion and the second portion and arranged on the first portion, a gate insulating layer arranged on the capping layer, a gate electrode on the active layer, wherein the gate insulating layer and the capping layer are disposed between the gate electrode and the active layer, and a source electrode and a drain electrode connected to the active layer.Type: ApplicationFiled: May 16, 2019Publication date: June 11, 2020Inventors: KOHEI EBISUNO, Sungjun Kim, Donghyun Son, Jaesoo Jung, Sunghoon Moon, Jingoo Jung
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Patent number: 10644089Abstract: A display device includes a scan line that extends in a first direction on a substrate and that transmits a scan signal; a data line that extends in a second direction that intersects the first direction and that transmits a data signal; a driving voltage line that extends in the second direction and that transmits a driving voltage; a transistor that includes a second transistor connected to the scan line and the data line and a first transistor connected to the second transistor; a light emitting device connected to the transistor; and a conductive pattern disposed between the substrate and the first transistor, where each of the first and second transistors includes an active pattern with a stacked first semiconductor layer and a second semiconductor layer, which have different crystalline states.Type: GrantFiled: June 1, 2017Date of Patent: May 5, 2020Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jun Hee Lee, In Jun Bae, Kohei Ebisuno
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Patent number: 10614755Abstract: A display device includes a plurality of pixels arranged in rows and columns, a plurality of first power lines that extend in a pixel column direction and through which a power supply voltage is supplied to the pixels, and a plurality of second power lines that extend in the pixel column direction and through which an initialization voltage different from the power supply voltage is to the pixels. The number of first power lines is greater than the number of second power lines.Type: GrantFiled: April 20, 2017Date of Patent: April 7, 2020Assignee: JOLED INC.Inventors: Kohei Ebisuno, Masafumi Matsui, Hitoshi Tsuge
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Publication number: 20200105858Abstract: A display apparatus includes a base substrate including a display area in which an image is displayed and a peripheral area adjacent to the display area, a source/drain pattern on the base substrate, the source/drain pattern including a connecting electrode in a pad portion of the peripheral area and a electrode of a thin film transistor in the display area, a planarization insulation layer on the base substrate, the planarization insulation layer contacting a side surface of the connecting electrode and a side surface of the electrode of the thin film transistor, and exposing a top surface of the connecting electrode, a connecting member contacting the connecting electrode, and a driving member including a driving circuit, the driving member being connected to the connecting member.Type: ApplicationFiled: September 24, 2019Publication date: April 2, 2020Inventors: Dong Hyun SON, Sung Hoon MOON, Sung Jun KIM, Kohei EBISUNO, Deok Hoi KIM, Sanghoon OH
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Patent number: 10482814Abstract: A method for driving a display device including a plurality of pixels arranged in rows and columns, each of the pixels including an organic EL device that emits light in accordance with supplied current, a driving transistor that supplies current to the organic EL device, and a storage capacitor connected between the gate of driving transistor and a source or drain thereof, includes causing the organic EL device to emit light by supplying current to the organic EL device; resetting charge of at least one of the storage capacitor and a parasitic capacitance of the organic EL device; and applying a reverse bias voltage between the gate and source of the driving transistor. The resetting is performed between the light emission and the reverse-bias application.Type: GrantFiled: July 31, 2015Date of Patent: November 19, 2019Assignee: JOLED INC.Inventors: Kohei Ebisuno, Shinya Ono, Masafumi Matsui
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Patent number: 10395595Abstract: Pixel circuits each include a write transistor having a gate electrode connected to a write control line, one of a drain electrode and a source electrode connected to a data line for transmitting data voltage corresponding to luminance of the pixel circuit, and the other of the drain electrode and the source electrode connected to a gate electrode of a drive transistor. A compensation circuit includes a compensation transistor connected to a compensation signal line and the write control line. A compensation voltage generation circuit outputs compensation control voltage in accordance with a representative value of data voltage for the pixel circuits. A capacitance of the write control line caused by the compensation transistor and a capacitance of the write control line caused by the write transistors of the pixel circuits have mutually opposite voltage dependence with respect to the representative value of the data voltage for the pixel circuits.Type: GrantFiled: May 31, 2017Date of Patent: August 27, 2019Assignee: JOLED INC.Inventors: Masafumi Matsui, Hitoshi Tsuge, Kohei Ebisuno
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Publication number: 20190252420Abstract: A method for fabricating a thin film transistor substrate includes forming a buffer layer including at least one film on a base substrate, planarizing a surface of the buffer layer, and forming a thin film transistor on the buffer layer.Type: ApplicationFiled: February 12, 2019Publication date: August 15, 2019Inventors: Jun Hee LEE, Sung Hoon MOON, Dong Hyun SON, Pil Soo AHN, Kohei EBISUNO, Sang Hoon OH
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Patent number: 10319303Abstract: A plurality of pixel circuits included in a display device each includes: a drive transistor; a capacitor connected to a gate electrode and a source electrode of the drive transistor; a light-emitting element which is driven by the drive transistor; a write transistor having a gate electrode connected to a write control line for transmitting a write signal, one of a drain electrode and a source electrode connected to a data line for transmitting a data voltage corresponding to luminance, and the other of the drain electrode and the source electrode connected to the gate electrode of the drive transistor; and a compensation transistor having a gate electrode connected to the data line, and at least one of a drain electrode and a source electrode connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.Type: GrantFiled: March 28, 2017Date of Patent: June 11, 2019Assignee: JOLED INC.Inventors: Masafumi Matsui, Hitoshi Tsuge, Kohei Ebisuno
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Patent number: 10074310Abstract: A display device includes a display pixel having: an organic EL element; a capacitor element; a drive transistor having a gate electrode connected to a first electrode of the capacitor element and a source electrode connected to a second electrode of the capacitor element and to an anode electrode of the organic EL element; a first switch element switching a state between a signal line supplying a voltage corresponding to a data signal and the first electrode of the capacitor element, between conducting and non-conducting states; and a resistance unit having a resistance, switching a state between a power line supplying an initialization voltage and the second electrode of the capacitor element between the conducting and non-conducting states, and disposed on a current path from a node that is a connection point of the second electrode and the anode electrode of the organic EL element to the power line.Type: GrantFiled: October 2, 2015Date of Patent: September 11, 2018Assignee: JOLED INC.Inventor: Kohei Ebisuno
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Patent number: 10074710Abstract: An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, and a plurality of transmitting windows configured to transmit light therethrough. The plurality of transmitting windows is spaced apart from the plurality of pixels. Each of the plurality of pixels includes a transistor and a capacitor. The transistor includes a light-blocking electrode disposed on the substrate and a plurality of electrode members disposed at different layers on the light-blocking electrode. The capacitor includes a first capacitor electrode disposed on a same layer as the light-blocking electrode, and a second capacitor electrode disposed on a same layer as a first one of the plurality of electrode members to overlap the first capacitor electrode.Type: GrantFiled: April 18, 2017Date of Patent: September 11, 2018Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Kohei Ebisuno, Ae Shin, Yong Ho Yang, Jun Hee Lee, Nak Cho Choi
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Patent number: 9960223Abstract: An active-matrix display device according to the present disclosure includes a plurality of pixels. Each of the pixels includes: a drive transistor disposed on a substrate; and an organic EL element that is caused by the drive transistor to emit light and includes an AM layer disposed above the substrate and a transparent electrode layer disposed above the AM layer. The active-matrix display device further includes: a source line that supplies data to the pixels; and a power supply line that supplies electric power to the pixels. The power supply line is shared by, among the plurality of pixels, two pixels that are adjacent to each other in a second direction that crosses a first direction in which the power supply line is extended. The source line and the AM layer are disposed not to overlap each other in a plan view of the substrate.Type: GrantFiled: April 20, 2017Date of Patent: May 1, 2018Assignee: JOLED INC.Inventors: Kohei Ebisuno, Masafumi Matsui, Hitoshi Tsuge
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Publication number: 20180108295Abstract: A display device includes a display pixel having: an organic EL element; a capacitor element; a drive transistor having a gate electrode connected to a first electrode of the capacitor element and a source electrode connected to a second electrode of the capacitor element and to an anode electrode of the organic EL element; a first switch element switching a state between a signal line supplying a voltage corresponding to a data signal and the first electrode of the capacitor element, between conducting and non-conducting states; and a resistance unit having a resistance, switching a state between a power line supplying an initialization voltage and the second electrode of the capacitor element between the conducting and non-conducting states, and disposed on a current path from a node that is a connection point of the second electrode and the anode electrode of the organic EL element to the power line.Type: ApplicationFiled: October 2, 2015Publication date: April 19, 2018Applicant: JOLED INC.Inventor: Kohei EBISUNO
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Publication number: 20180069069Abstract: An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, and a plurality of transmitting windows configured to transmit light therethrough. The plurality of transmitting windows is spaced apart from the plurality of pixels. Each of the plurality of pixels includes a transistor and a capacitor. The transistor includes a light-blocking electrode disposed on the substrate and a plurality of electrode members disposed at different layers on the light-blocking electrode. The capacitor includes a first capacitor electrode disposed on a same layer as the light-blocking electrode, and a second capacitor electrode disposed on a same layer as a first one of the plurality of electrode members to overlap the first capacitor electrode.Type: ApplicationFiled: April 18, 2017Publication date: March 8, 2018Inventors: KOHEI EBISUNO, AE SHIN, YONG HO YANG, JUN HEE LEE, NAK CHO CHOI
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Publication number: 20180040682Abstract: An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, a plurality of transmissive windows spaced apart from the pixels, and a light blocking member disposed between one of the pixels and one of the transmissive windows. The pixels display an image, and light is transmitted through the transmissive windows. Each pixel includes a transistor including a plurality of electrode members disposed in different layers on the substrate. The light blocking member includes a plurality of light blocking sub-members respectively disposed in the same layers as the plurality of electrode members.Type: ApplicationFiled: May 1, 2017Publication date: February 8, 2018Inventors: KOHEI EBISUNO, YONG HO YANG, JUN HEE LEE, NAK CHO CHOI
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Publication number: 20170352312Abstract: An organic EL display includes: a sub-pixel and a sub-pixel arranged adjacent to each other and each including a driving transistor; and a power supply line for supplying a power supply voltage to the driving transistor of the sub-pixel and the driving transistor of the sub-pixel, the power supply line being disposed at a boundary between the sub-pixel and the sub-pixel. The driving transistor of the sub-pixel and the driving transistor of the sub-pixel are oriented in a same direction.Type: ApplicationFiled: December 9, 2015Publication date: December 7, 2017Applicant: JOLED INC.Inventors: Kohei EBISUNO, Shinya ONO, Hitoshi TSUGE, Ichiro SATO