Patents by Inventor Doh-Hyoung Lee
Doh-Hyoung Lee 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: 11910654Abstract: An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk, the display may include active and/or passive leakage-mitigating structures. The passive leakage-mitigating structures may have an undercut that causes discontinuities in the overlying OLED layers. Active leakage-mitigating structures may include a conductive layer (e.g., a conductive ring) that drains leakage current to ground. Alternatively, the active leakage-mitigating structures may include a gate electrode modulator with a variable voltage that stops the current flow laterally.Type: GrantFiled: August 5, 2021Date of Patent: February 20, 2024Assignee: Apple Inc.Inventors: Po-Chun Yeh, Jiun-Jye Chang, Doh-Hyoung Lee, Caleb Coburn, Niva A. Ran, Ching-Sang Chuang, Themistoklis Afentakis, Chuan-Jung Lin, Jung Yen Huang, Lei Yuan
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Publication number: 20230247867Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: April 12, 2023Publication date: August 3, 2023Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 11665933Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: GrantFiled: April 19, 2022Date of Patent: May 30, 2023Assignee: Apple Inc.Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Publication number: 20220238616Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: April 19, 2022Publication date: July 28, 2022Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 11342395Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: GrantFiled: May 14, 2021Date of Patent: May 24, 2022Assignee: Apple Inc.Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 11257883Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: GrantFiled: February 21, 2020Date of Patent: February 22, 2022Assignee: Apple Inc.Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Publication number: 20210273031Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: May 14, 2021Publication date: September 2, 2021Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 11101337Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, and may include laser-deposited metal on the cathode layer. Data lines may be formed from metal layers in the active area to accommodate the rounded corners of the display.Type: GrantFiled: May 12, 2020Date of Patent: August 24, 2021Assignee: Apple Inc.Inventors: Yuchi Che, Warren S. Rieutort-Louis, Tsung-Ting Tsai, Abbas Jamshidi Roudbari, Jiun-Jye Chang, Ting-Kuo Chang, Shih Chang Chang, Chin-Wei Lin, Stephen S. Poon, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Vasudha Gupta, Younggu Lee
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Publication number: 20200273928Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, and may include laser-deposited metal on the cathode layer. Data lines may be formed from metal layers in the active area to accommodate the rounded corners of the display.Type: ApplicationFiled: May 12, 2020Publication date: August 27, 2020Inventors: Yuchi Che, Warren S. Rieutort-Louis, Tsung-Ting Tsai, Abbas Jamshidi Roudbari, Jiun-Jye Chang, Ting-Kuo Chang, Shih Chang Chang, Chin-Wei Lin, Stephen S. Poon, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Vasudha Gupta, Younggu Lee
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Publication number: 20200194525Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: February 21, 2020Publication date: June 18, 2020Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 10629664Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: GrantFiled: March 26, 2019Date of Patent: April 21, 2020Assignee: Apple Inc.Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Publication number: 20190221624Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 10312309Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: GrantFiled: March 15, 2018Date of Patent: June 4, 2019Assignee: Apple Inc.Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Publication number: 20180204895Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.Type: ApplicationFiled: March 15, 2018Publication date: July 19, 2018Inventors: Chin-Wei Lin, Stephen S. Poon, Warren S. Rieutort-Louis, Cheng-Ho Yu, ChoongHo Lee, Doh-Hyoung Lee, Ting-Kuo Chang, Tsung-Ting Tsai, Vasudha Gupta, Younggu Lee
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Patent number: 9782861Abstract: A metal sheet holding device for manufacturing a pattern mask used in manufacturing processes of a flat panel displays include a first holder and second holder. The first holder includes an adhesive layer contacting edge portions of a metal sheet, and a first frame supporting the metal sheet using the adhesive layer. The second holder includes a second frame below the first frame, a supported plate positioned at the center of the second frame, and an adhered unit positioned between the central portion of a metal sheet and the supported plate. The adhered unit generates an electrostatic force or a magnetic force to hold the central portion of the metal sheet.Type: GrantFiled: October 1, 2013Date of Patent: October 10, 2017Assignee: Samsung Display Co., Ltd.Inventors: Choong-Ho Lee, Sung-Sik Yun, Tong-Jin Park, Doh-Hyoung Lee
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Patent number: 9676063Abstract: A manufacturing method of a metal mask including a plurality of pattern openings includes forming a first depression portion by radiating a first laser beam focused on a plane beyond a subject under processing, and then forming the plurality of pattern openings at a bottom part of the first depression portion by radiating a second laser beam focused on the bottom part of the first depression portion. Because the energy of the second laser beam is less than the first laser beam, manufacturing time of the mask is reduced while the sidewalls of the pattern opening are smooth and may be inclined, to allow for a better deposition of organic emission material onto a large display.Type: GrantFiled: July 1, 2014Date of Patent: June 13, 2017Assignee: Samsung Display Co., Ltd.Inventors: Doh-Hyoung Lee, Da Hee Jeong
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Patent number: 9656291Abstract: Disclosed is a method of manufacturing a metal mask. A method of manufacturing a metal mask in accordance with an exemplary embodiment of the present invention includes forming through holes in a plate using a laser, by scanning the laser onto sequentially smaller overlapping portions of the plate.Type: GrantFiled: September 4, 2014Date of Patent: May 23, 2017Assignee: Samsung Display Co., Ltd.Inventors: Choong Ho Lee, Tong-Jin Park, Doh-Hyoung Lee, Sung Sik Yun, Da Hee Jeong, Jun Ho Jo
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Patent number: 9643280Abstract: A laser processing apparatus includes: a laser generator that generates a laser beam, a diffractive optical element that divides the laser beam generated by the laser generator into a plurality of sub-laser beams, and a beam gap adjustor that adjusts a gap between neighboring ones of the plurality of sub-laser beams. Therefore, by installing a diffractive optical element that divides a laser beam that is generated by the laser generator into the plurality of sub-laser beams and a beam gap adjustor to adjust a gap between a plurality of sub-laser beams, the laser processing apparatus can form a processing pattern of various resolutions in a shadow mask while improving a processing speed of the shadow mask.Type: GrantFiled: November 20, 2013Date of Patent: May 9, 2017Assignees: Samsung Display Co., Ltd., FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Doh-Hyoung Lee, Choong-Ho Lee, Sung-Sik Yun, Tong-Jin Park, Arnold Gillner, Nelli Hambach, Stephan Eifel, Jens Holtkamp, Lasse Büsing, Alexander Gatej
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Patent number: 9592570Abstract: A laser processing apparatus includes a laser generator for generating laser beams, a diffraction optic element for dividing the laser beam generated by the laser generator into a plurality of sub-laser beams, and a beam number controller for controlling the number of the plurality of sub-laser beams. Accordingly, the diffractive optic element that splits a laser beam generated by the laser beam generator into a plurality of sub-laser beams and the beam number controller that controls the number of sub-laser beams are provided so that the processing speed of a processing target can be improved and, at the same time, the number of laser beams can be promptly controlled, thereby promptly forming various patterns of the processing target.Type: GrantFiled: June 17, 2013Date of Patent: March 14, 2017Assignees: Samsung Display Co., Ltd., FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Doh-Hyoung Lee, Choong-Ho Lee, Sung-Sik Yun, Tong-Jin Park, Arnold Gillner, Nelli Hambach, Stephan Eifel, Jens Holtkamp, Lasse Büsing, Alexander Gatej
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Patent number: 9457426Abstract: A mask substrate that includes a first area and a second area surrounding the first area is provided. Then, a laser beam is irradiated on the mask substrate to at least partly remove a material of the second area. After that, a physical force is applied to the mask substrate to separate the first area from the mask substrate thereby forming an opening through the mask substrate.Type: GrantFiled: September 9, 2013Date of Patent: October 4, 2016Assignee: Samsung Display Co., Ltd.Inventors: Doh-Hyoung Lee, Jun Ho Jo