Patents by Inventor Sandeep Chalasani

Sandeep Chalasani 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).

  • Patent number: 11940848
    Abstract: An electronic device display may have pixels formed from crystalline semiconductor light-emitting diode dies, organic light-emitting diodes, or other pixel structures. The pixels may be formed on a display panel substrate. A display panel may extend continuously across the display or multiple display panels may be tiled in two dimensions to cover a larger display area. Interconnect substrates may have outwardly facing contacts that are electrically shorted to corresponding inwardly facing contacts such as inwardly facing metal pillars associated with the display panels. The interconnect substrates may be supported by glass layers. Integrated circuits may be embedded in the display panels and/or in the interconnect substrates. A display may have an active area with pixels that includes non-spline pixels in a non-spline display portion located above a straight edge of the display and spline pixel in a spline display portion located above a curved edge of the display.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: March 26, 2024
    Assignee: Apple Inc.
    Inventors: Elmar Gehlen, Zhen Zhang, Francois R. Jacob, Paul S. Drzaic, Han-Chieh Chang, Abbas Jamshidi Roudbari, Anshi Liang, Hopil Bae, Mahdi Farrokh Baroughi, Marc J. DeVincentis, Paolo Sacchetto, Tiffany T. Moy, Warren S. Rieutort-Louis, Yong Sun, Jonathan P. Mar, Zuoqian Wang, Ian D. Tracy, Sunggu Kang, Jaein Choi, Steven E. Molesa, Sandeep Chalasani, Jui-Chih Liao, Xin Zhao, Izhar Z. Ahmed
  • Patent number: 11929388
    Abstract: 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: Grant
    Filed: August 24, 2022
    Date of Patent: March 12, 2024
    Assignee: Apple Inc.
    Inventors: Sandeep Chalasani, Steven E Molesa, Anatole Huang, Mahdi Farrokh Baroughi, Xia Li, Yongjie Jiang, Mittul Gupta, Stanley B Wang
  • Publication number: 20230090344
    Abstract: 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 conred 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: Application
    Filed: August 24, 2022
    Publication date: March 23, 2023
    Inventors: Sandeep Chalasani, Steven E Molesa, Anatole Huang, Mahdi Farrokh Baroughi, Xia Li, Yongjie Jiang, Mittul Gupta, Stanley B Wang
  • Publication number: 20230087088
    Abstract: 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: Application
    Filed: August 24, 2022
    Publication date: March 23, 2023
    Inventors: 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
  • Publication number: 20220068900
    Abstract: A micro-light-emitting diode (LED) display includes a number of micro-LED pixel elements and multiple optical sensors integrated with the micro-LED pixel elements. A transparent conductor layer is disposed over the micro-LED pixel elements and optical sensors.
    Type: Application
    Filed: August 10, 2021
    Publication date: March 3, 2022
    Inventors: Xiaofan NIU, Sunggu KANG, Mohammad YEKE YAZDANDOOST, Giovanni GOZZINI, Xia LI, Oray O. CELLEK, Sandeep CHALASANI, Steven E. MOLESA, Jaein CHOI
  • Publication number: 20220050506
    Abstract: An electronic device display may have pixels formed from crystalline semiconductor light-emitting diode dies, organic light-emitting diodes, or other pixel structures. The pixels may be formed on a display panel substrate. A display panel may extend continuously across the display or multiple display panels may be tiled in two dimensions to cover a larger display area. Interconnect substrates may have outwardly facing contacts that are electrically shorted to corresponding inwardly facing contacts such as inwardly facing metal pillars associated with the display panels. The interconnect substrates may be supported by glass layers. Integrated circuits may be embedded in the display panels and/or in the interconnect substrates. A display may have an active area with pixels that includes non-spline pixels in a non-spline display portion located above a straight edge of the display and spline pixel in a spline display portion located above a curved edge of the display.
    Type: Application
    Filed: August 2, 2021
    Publication date: February 17, 2022
    Inventors: Elmar Gehlen, Zhen Zhang, Francois R. Jacob, Paul S. Drzaic, Han-Chieh Chang, Abbas Jamshidi Roudbari, Anshi Liang, Hopil Bae, Mahdi Farrokh Baroughi, Marc J. DeVincentis, Paolo Sacchetto, Tiffany T. Moy, Warren S. Rieutort-Louis, Yong Sun, Jonathan P. Mar, Zuoqian Wang, Ian D. Tracy, Sunggu Kang, Jaein Choi, Steven E. Molesa, Sandeep Chalasani, Jui-Chih Liao, Xin Zhao, Izhar Z. Ahmed
  • Patent number: 10546796
    Abstract: Micro LED and microdriver chip integration schemes are described. In an embodiment a microdriver chip includes a plurality of trenches formed in a bottom surface of the microdriver chip, with each trench surrounding a conductive stud extending below a bottom surface of the microdriver chip body. Integration schemes are additionally described for providing electrical connection to conductive terminal contacts and micro LEDs bonded to a display substrate and adjacent to a microdriver chip.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: January 28, 2020
    Assignee: Apple Inc.
    Inventors: Hsin-Hua Hu, Jaein Choi, James E. Pedder, Ion Bita, Hairong Tang, Chin Wei Hsu, Sandeep Chalasani, Chih-Lei Chen, Sunggu Kang, Shinya Ono, Jung Yen Huang, Lun Tsai
  • Publication number: 20190115274
    Abstract: Micro LED and microdriver chip integration schemes are described. In an embodiment a microdriver chip includes a plurality of trenches formed in a bottom surface of the microdriver chip, with each trench surrounding a conductive stud extending below a bottom surface of the microdriver chip body. Integration schemes are additionally described for providing electrical connection to conductive terminal contacts and micro LEDs bonded to a display substrate and adjacent to a microdriver chip.
    Type: Application
    Filed: February 10, 2017
    Publication date: April 18, 2019
    Applicant: Apple Inc.
    Inventors: Hsin-Hua Hu, Jaein Choi, James E. Pedder, Ion Bita, Hairong Tang, Chin Wei Hsu, Sandeep Chalasani, Chih-Lei Chen, Sunggu Kang, Shinya Ono, Jung Yen Huang, Lun Tsai