Patents by Inventor Sunmin Jang
Sunmin Jang 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: 12499815Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. As image data is written to a pixel in the row of pixels, capacitive coupling at a driver may lead to distortion on the driver. In particular, the capacitive coupling may cause distortion at a storage capacitor, which may lead to current droop at the pixel. The current droop may be reduced or eliminated in each pixel by performing pixel compensation. The pattern of the pixel compensation may be selected such that, over a number of subframes, an average amount of light is the same or similar to what would be emitted had pixel compensation been performed on each pixel in each subframe.Type: GrantFiled: June 14, 2023Date of Patent: December 16, 2025Assignee: Apple Inc.Inventors: Jeongsup Lee, Hasan Akyol, Xiang Lu, Mahdi Farrokh Baroughi, Nikhil Acharya, Haitao Li, Hopil Bae, John T Wetherell, Shengzhe Jiao, Stanley B Wang, Sunmin Jang, Hari P Paudel, Eric A Hildebrandt, Young Don Bae
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Patent number: 12451056Abstract: A display system may include a plurality of light emitting diodes to emit light, where each of the light emitting diodes are connected in parallel and a plurality of first switches respectively coupled to the plurality of light emitting diodes. A first switch of the plurality of first switches is coupled in parallel to a first light emitting diode. The first switch may short the first light emitting diode of the plurality of light emitting diodes through a defined resistor having a defined value that therefore draws a defined short circuit current.Type: GrantFiled: May 29, 2024Date of Patent: October 21, 2025Assignee: Apple Inc.Inventors: Shengzhe Jiao, Arjunsimha Chaturbhuj, Chen Chen, Derek K Shaeffer, Dongwon Kwon, Feng Yu, Haojiang Zhou, Hari P Paudel, Henry C Jen, Hopil Bae, Jialin Liu, Ling Zhang, Majid Gharghi, Nikhil Acharya, Pablo Moreno Galbis, Ruofan Zhang, Stanley B Wang, Sunmin Jang, Wei H Yao, Wei Xiong, Xia Li, Xiang Lu, Yongjie Jiang
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Publication number: 20250285578Abstract: A display system may include a plurality of light emitting diodes to emit light, where each of the light emitting diodes are connected in parallel and a plurality of first switches respectively coupled to the plurality of light emitting diodes. A first switch of the plurality of first switches is coupled in parallel to a first light emitting diode. The first switch may short the first light emitting diode of the plurality of light emitting diodes through a defined resistor having a defined value that therefore draws a defined short circuit current.Type: ApplicationFiled: May 29, 2024Publication date: September 11, 2025Inventors: Shengzhe Jiao, Arjunsimha Chaturbhuj, Chen Chen, Derek K Shaeffer, Dongwon Kwon, Feng Yu, Haojiang Zhou, Hari P Paudel, Henry C Jen, Hopil Bae, Jialin Liu, Ling Zhang, Majid Gharghi, Nikhil Acharya, Pablo Moreno Galbis, Ruofan Zhang, Stanley B Wang, Sunmin Jang, Wei H Yao, Wei Xiong, Xia Li, Xiang Lu, Yongjie Jiang
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Patent number: 12387652Abstract: A control circuit adjusts a value of a source supply voltage VSSEL provided to a display area in an electronic display. The control circuit also adjusts a voltage Vreset applied to the display area to cause the display area to emit light more uniformly under various ambient conditions (e.g., temperature) surrounding the display area. Dynamically changing Vreset is employed to make anode charging dynamics independent of temperature. The control circuit adjusts the source supply voltage VSSEL and the voltage Vreset together to compensate display pixel hysteresis effects and display artifacts caused by temperature changes and brightness changes of the display area and collectively produce images. Dynamically tuning the Vreset and the VSSEL voltages also saves power and improves gray level accuracy for the electronic display.Type: GrantFiled: June 1, 2023Date of Patent: August 12, 2025Assignee: Apple Inc.Inventors: Mahdi Farrokh Baroughi, Hopil Bae, Seung B Rim, Haitao Li, Sunmin Jang, Ce Zhang
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Patent number: 12387670Abstract: Electronic devices, displays, and methods are provided for operating an electronic display in coexistence with sensors that could be adversely impacted by the operation of the electronic display. An electronic device may include an electronic display and a sensor. The electronic display may display image content by light emission during an emission period and periodically enter a quiet period in which the light emission of the electronic display is turned off. The sensor may perform sensing operations during the quiet period without interference from the operation of the electronic display.Type: GrantFiled: September 15, 2023Date of Patent: August 12, 2025Assignee: Apple Inc.Inventors: Mahdi Farrokh Baroughi, Ce Zhang, Haitao Li, Hari P Paudel, Hopil Bae, Jeongsup Lee, Nikhil Acharya, Pablo Moreno Galbis, Seung B Rim, SeyedAli TaheriTari, Shengzhe Jiao, Stanley B Wang, Sunmin Jang, Xiang Lu, Yaser Azizi, Young Don Bae
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Patent number: 12243465Abstract: To reduce image artifacts and non-uniformity associated with a display pixel of an electronic display, processing circuity may adjust a luminance value corresponding to a display pixel according to a per-pixel gain mask, a per-pixel anode mask, or both. To further correct for the non-uniformity, the processing circuitry may convert the luminance value to a digital code based on a curve associated with an anode on which the display pixel is located.Type: GrantFiled: April 6, 2023Date of Patent: March 4, 2025Assignee: Apple Inc.Inventors: Sunmin Jang, Mahdi Farrokh Baroughi, Saif Choudhary, Hopil Bae, Gautam Agrawal, Ionut A Mirel, Hari P Paudel, Haitao Li, Wei H Yao, Mahesh B Chappalli, Young Don Bae
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Patent number: 12236850Abstract: To reduce image artifacts induced by temperature variations associated with display pixels of an electronic display, processing circuitry may process temperature sensing data to obtain an average temperature and a temperature distribution of the electronic display. Based on the processed temperature data, the processing circuit may adjust a reference voltage applied to the display pixels to compensate for the average temperate. To further correct for the image artifacts, the processing circuitry may transform image data to luminance domain. Based on the processed temperature data, the processing may adjust luminance vales of the image data to compensate for the temperature distribution.Type: GrantFiled: June 14, 2023Date of Patent: February 25, 2025Assignee: Apple Inc.Inventors: Sunmin Jang, Ce Zhang, Hopil Bae, Mahdi Farrokh Baroughi, Pablo Moreno Galbis, Paolo Sacchetto, Yaser Azizi, Young Don Bae
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Publication number: 20240105115Abstract: Electronic devices, displays, and methods are provided for operating an electronic display in coexistence with sensors that could be adversely impacted by the operation of the electronic display. An electronic device may include an electronic display and a sensor. The electronic display may display image content by light emission during an emission period and periodically enter a quiet period in which the light emission of the electronic display is turned off. The sensor may perform sensing operations during the quiet period without interference from the operation of the electronic display.Type: ApplicationFiled: September 15, 2023Publication date: March 28, 2024Inventors: Mahdi Farrokh Baroughi, Ce Zhang, Haitao Li, Hari P. Paudel, Hopil Bae, Jeongsup Lee, Nikhil Acharya, Pablo Moreno Galbis, Seung B. Rim, SeyedAli TaheriTari, Shengzhe Jiao, Stanley B. Wang, Sunmin Jang, Xiang Lu, Yaser Azizi, Young Don Bae
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Publication number: 20240054945Abstract: An electronic display may include a first anode configured to carry a red emission signal, a second anode configured to carry a blue emission signal, a third anode configured to carry a green emission signal, and a micro-driver configured to stagger a timing of the red emission signal, the blue emission signal, and the green emission signal based on an emission clock signal to display image content on the electronic display.Type: ApplicationFiled: August 4, 2023Publication date: February 15, 2024Inventors: Mahdi Farrokh Baroughi, Young Don Bae, Jeongsup Lee, Hari P. Paudel, Sunmin Jang, Shengzhe Jiao, Nikhil Acharya, Yaser Azizi, Ali RostamPisheh, Stanley B. Wang, Haitao Li
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Publication number: 20240005833Abstract: A control circuit adjusts a value of a source supply voltage VSSEL provided to a display area in an electronic display. The control circuit also adjusts a voltage Vreset applied to the display area to cause the display area to emit light more uniformly under various ambient conditions (e.g., temperature) surrounding the display area. Dynamically changing Vreset is employed to make anode charging dynamics independent of temperature. The control circuit adjusts the source supply voltage VSSEL and the voltage Vreset together to compensate display pixel hysteresis effects and display artifacts caused by temperature changes and brightness changes of the display area and collectively produce images. Dynamically tuning the Vreset and the VSSEL voltages also saves power and improves gray level accuracy for the electronic display.Type: ApplicationFiled: June 1, 2023Publication date: January 4, 2024Inventors: Mahdi Farrokh Baroughi, Hopil Bae, Seung B Rim, Haitao Li, Sunmin Jang, Ce Zhang
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Publication number: 20240005850Abstract: To reduce image artifacts induced by temperature variations associated with display pixels of an electronic display, processing circuitry may process temperature sensing data to obtain an average temperature and a temperature distribution of the electronic display. Based on the processed temperature data, the processing circuit may adjust a reference voltage applied to the display pixels to compensate for the average temperate. To further correct for the image artifacts, the processing circuitry may transform image data to luminance domain. Based on the processed temperature data, the processing may adjust luminance vales of the image data to compensate for the temperature distribution.Type: ApplicationFiled: June 14, 2023Publication date: January 4, 2024Inventors: Sunmin Jang, Ce Zhang, Hopil Bae, Mahdi Farrokh Baroughi, Pablo Moreno Galbis, Paolo Sacchetto, Yaser Azizi, Young Don Bae
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Publication number: 20240005848Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. As image data is written to a pixel in the row of pixels, capacitive coupling at a driver may lead to distortion on the driver. In particular, the capacitive coupling may cause distortion at a storage capacitor, which may lead to current droop at the pixel. The current droop may be reduced or eliminated in each pixel by performing pixel compensation. The pattern of the pixel compensation may be selected such that, over a number of subframes, an average amount of light is the same or similar to what would be emitted had pixel compensation been performed on each pixel in each subframe.Type: ApplicationFiled: June 14, 2023Publication date: January 4, 2024Inventors: Jeongsup Lee, Hasan Akyol, Xiang Lu, Mahdi Farrokh Baroughi, Nikhil Acharya, Haitao Li, Hopil Bae, John T Wetherell, Shengzhe Jiao, Stanley B. Wang, Sunmin Jang, Hari P. Paudel, Eric A. Hildebrandt, Young Don Bae
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Publication number: 20230368718Abstract: To reduce image artifacts and non-uniformity associated with a display pixel of an electronic display, processing circuity may adjust a luminance value corresponding to a display pixel according to a per-pixel gain mask, a per-pixel anode mask, or both. To further correct for the non-uniformity, the processing circuitry may convert the luminance value to a digital code based on a curve associated with an anode on which the display pixel is located.Type: ApplicationFiled: April 6, 2023Publication date: November 16, 2023Inventors: Sunmin Jang, Mahdi Farrokh Baroughi, Saif Choudhary, Hopil Bae, Gautam Agrawal, Ionut A Mirel, Hari P Paudel, Haitao Li, Wei H Yao, Mahesh B Chappalli
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Patent number: 11688364Abstract: An electronic device may display image content via a tile-based display by controlling light emission from display pixels of the tile-based display. Based on image data associated with the image content, a processing circuitry of the tile-based display may receive a potential tile boundary. The processing circuitry may resample the image data based on geometry of the tile boundary and positions of the display pixels on the tile-based panel. After resampling the image data, the processing circuitry may adjust gain of the tile boundary display pixels according to a gain mask to compensate for the tile boundary.Type: GrantFiled: April 6, 2022Date of Patent: June 27, 2023Assignee: Apple Inc.Inventors: Hari P Paudel, Chaohao Wang, Hopil Bae, Mahdi Farrokh Baroughi, Wei Chen, Wei H Yao, Seung B Rim, Sunmin Jang
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Publication number: 20230087088Abstract: A display may be formed by an array of light-emitting diodes mounted to the surface of a display substrate. The light-emitting diodes may be inorganic light-emitting diodes formed from separate crystalline semiconductor structures. An array of pixel control circuits may be used to control light emission from the light-emitting diodes. Each pixel control circuit may be configured to control one or more respective passive matrices. To control partial pixel cells in the display, a donor pixel control circuit in a partial pixel cell may control the pixels in a receptor partial pixel cell without a pixel control circuit. To mitigate the size of an inactive area of the display, fanout signal lines for the display may be formed in the light-emitting active area of the display. The fanout signal lines may be formed between a row of pixel control circuits and a bottom edge of the light-emitting active area.Type: ApplicationFiled: August 24, 2022Publication date: March 23, 2023Inventors: Mahdi Farrokh Baroughi, Sandeep Chalasani, Xiang Lu, Anurag Mehta, Hopil Bae, Chaohao Wang, Rajesh Velayuthan, Steven E. Molesa, Yaser Azizi, Young Don Bae, Sunmin Jang, Haitao Li, Hari P. Paudel, Anatole Huang, Tyler R. Kakuda, David A. Doyle, Wei H. Yao, Majid Gharghi, Vaibhav D. Patel
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Publication number: 20220375427Abstract: An electronic device may display image content via a tile-based display by controlling light emission from display pixels of the tile-based display. Based on image data associated with the image content, a processing circuitry of the tile-based display may receive a potential tile boundary. The processing circuitry may resample the image data based on geometry of the tile boundary and positions of the display pixels on the tile-based panel. After resampling the image data, the processing circuitry may adjust gain of the tile boundary display pixels according to a gain mask to compensate for the tile boundary.Type: ApplicationFiled: April 6, 2022Publication date: November 24, 2022Inventors: Hari P Paudel, Chaohao Wang, Hopil Bae, Mahdi Farrokh Baroughi, Wei Chen, Wei H Yao, Seung B Rim, Sunmin Jang