Patents by Inventor Mohammad Ali Jangda

Mohammad Ali Jangda 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: 12136394
    Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: November 5, 2024
    Assignee: Apple Inc.
    Inventors: Hyunwoo Nho, Myungjoon Choi, Hyunsoo Kim, Mohammad Ali Jangda, Jie Won Ryu, Shiping Shen, Kingsuk Brahma, Chaohao Wang, Wei H. Yao, Alex H. Pai
  • Publication number: 20240096275
    Abstract: A electronic display device designed to calibrate brightness levels in a flat-panel display by using adjacent code calibration for a variable electroluminescence voltage supply in the flat-panel display.
    Type: Application
    Filed: September 19, 2022
    Publication date: March 21, 2024
    Applicant: APPLE INC.
    Inventors: Shubham A. Gandhi, Jonathan H. Beck, Koorosh Aflatooni, Mohammad Ali Jangda, Graeme M. Williams, Kingsuk Brahma, Snehal T. Jariwala, Salman Kabir, Josiah Smith
  • Publication number: 20240078961
    Abstract: Systems and methods are described herein to control brightness based on image content or other inputs to a display system. A dual-control system may integrate both slow control operations and fast control operations into a cohesive brightness management system. By using both shorter-term (e.g., fast control) and longer-term (e.g., slow control) brightness adjustment operations, the electronic device may quickly respond to high luminance and high brightness situations that may cause burn-in into the display, image artifacts, or other damage. Responding quickly to these high consumption situations may prevent damage or perceivable upset to an ongoing process, among other benefits.
    Type: Application
    Filed: December 6, 2022
    Publication date: March 7, 2024
    Inventors: Wanqing Xin, Yang Xu, Mohammad Ali Jangda, Jenny Hu, Koorosh Aflatooni, Giovanni Corradini, Martin Kocicka, Alexey Kornienko, Asha G Karvaje, Aishwarya Prem Renu, Andrew D Pangborn, Chaohao Wang, Yingying Tang, Arthur L Spence, Mahesh B Chappalli
  • Publication number: 20240054973
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Application
    Filed: October 24, 2023
    Publication date: February 15, 2024
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Publication number: 20240013692
    Abstract: To reduce overall power consumption for an electronic display power management integrated circuit (PMIC), one of multiple electric power converters and/or electric power regulators may be selected based on an electrical load (e.g., due to the total brightness of the content displayed) on the electronic display at a given moment. In some embodiments, the PMIC may include a less efficient heavy load converter designed with high-current handling capability and a more efficient light load (e.g., low current) converter with lower current handling capability. A controller may dynamically select between the converters depending on a present load or an expected load on the electronic display.
    Type: Application
    Filed: June 21, 2023
    Publication date: January 11, 2024
    Inventors: Jie Won Ryu, Ardra Singh, Arthur L. Spence, Christopher P. Tann, Chun Lu, Daniel J. Drusch, Hyunwoo Nho, Jongyup Lim, Kingsuk Brahma, Marc J. DeVincentis, Mohammad Ali Jangda, Paolo Sacchetto, Peter F. Holland, Shawn P. Hurley, Wei H. Yao, Yue Jack Chu, Zhe Hua
  • Patent number: 11842708
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Grant
    Filed: January 27, 2023
    Date of Patent: December 12, 2023
    Assignee: Apple Inc.
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Patent number: 11756505
    Abstract: Systems, methods, and devices are provided for providing intra-frame luminance scaling to avoid drawing excessive power while still providing exceptional brightness. An instantaneous average pixel luminance of an electronic display may be determined. The instantaneous average pixel luminance may correspond to an amount of light currently being emitted by the electronic display due to a previous image frame and a current image frame. Based at least in part on the instantaneous average pixel luminance, the luminance of a subset of pixels of image data of the current image frame may be adjusted, thereby allowing the electronic display to operate at a relatively high brightness level without exceeding a power limit.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: September 12, 2023
    Assignee: Apple Inc.
    Inventors: Yang Xu, Jie Won Ryu, Kingsuk Brahma, Koorosh Aflatooni, Marc Joseph DeVincentis, Mohammad Ali Jangda, Paolo Sacchetto, Shengkui Gao, Sinan Alousi, Yafei Bi, Chun Lu
  • Publication number: 20230197020
    Abstract: This disclosure provide various techniques for tracking emission profiles on an electronic display. An emission profile may be applied to the electronic display in order to illuminate certain pixels and deactivate (e.g., turn off) certain pixels in the electronic display to facilitate refreshing (e.g., programming with new image data) the deactivated pixels. A real-time row-based average pixel level or average pixel luminance calculation architecture may track the one or more EM profiles to accurately model EM profile behavior, which may enable accurate calculation of the average pixel level or average pixel luminance of the electronic display at any one point in time. The accurate average pixel level or average pixel luminance calculations effectuated by the EM profile tracking may be used to reduce the IR drop, improve real-time peak-luminance control, and improve the performance of under-display sensors, among other advantages.
    Type: Application
    Filed: November 16, 2022
    Publication date: June 22, 2023
    Inventors: Shengkui Gao, Jie Won Ryu, Kingsuk Brahma, Marc J DeVincentis, Mohammad Ali Jangda, Paolo Sacchetto, Weijun Yao, Yafei Bi, Yang Xu, Yue Jack Chu, Zhe Hua
  • Publication number: 20230169936
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Application
    Filed: January 27, 2023
    Publication date: June 1, 2023
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Patent number: 11580934
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: February 14, 2023
    Assignee: Apple Inc.
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Publication number: 20220270569
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Application
    Filed: May 10, 2022
    Publication date: August 25, 2022
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Patent number: 11348555
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: May 31, 2022
    Assignee: Apple Inc.
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Patent number: 11302264
    Abstract: A display device may include rows of pixels that display image data on a display and a circuit. The circuit may receive pixel data value of image data for a pixel in a first row of the rows of pixels, determine a weight factor to apply to the pixel data value based on a position of the first row with respect to the other rows, such that each row is associated with a current-resistance (IR) drop across the display. The weight factor is determined based on a respective IR drop associated with the first row. The circuit may also generate a weighted pixel data value based on the weight factor and the pixel data value and send the weighted pixel data value to a display driver circuit that renders the image data via the display.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: April 12, 2022
    Assignee: Apple Inc.
    Inventors: Shengkui Gao, Marc Joseph DeVincentis, Yue Jack Chu, Sinan Alousi, Mohammad Hajirostam, Mohammad Ali Jangda, Koorosh Aflatooni, Pierre-Yves Emelie, Yafei Bi, Paolo Sacchetto, Kasra Omid-Zohoor
  • Patent number: 11205363
    Abstract: An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: December 21, 2021
    Assignee: Apple Inc.
    Inventors: Myungjoon Choi, Kingsuk Brahma, Li-Xuan Chuo, Mohammad Ali Jangda, Hyunsoo Kim, Hyunwoo Nho, Alex H. Pai, Jesse Aaron Richmond, Jie Won Ryu, Shiping Shen, Chaohao Wang
  • Publication number: 20210304703
    Abstract: Systems, methods, and devices are provided for providing intra-frame luminance scaling to avoid drawing excessive power while still providing exceptional brightness. An instantaneous average pixel luminance of an electronic display may be determined. The instantaneous average pixel luminance may correspond to an amount of light currently being emitted by the electronic display due to a previous image frame and a current image frame. Based at least in part on the instantaneous average pixel luminance, the luminance of a subset of pixels of image data of the current image frame may be adjusted, thereby allowing the electronic display to operate at a relatively high brightness level without exceeding a power limit.
    Type: Application
    Filed: March 30, 2021
    Publication date: September 30, 2021
    Inventors: Yang Xu, Jie Won Ryu, Kingsuk Brahma, Koorosh Aflatooni, Marc Joseph DeVincentis, Mohammad Ali Jangda, Paolo Sacchetto, Shengkui Gao, Sinan Alousi, Yafei Bi, Chun Lu
  • Publication number: 20210241720
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Application
    Filed: March 29, 2021
    Publication date: August 5, 2021
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei H. Yao
  • Patent number: 11061793
    Abstract: Circuits, methods, and apparatus that may estimate the power being consumed by an OLED display screen of an electronic device, may provide further information about that power usage, may modify or change functions performed by the electronic device based on that power usage, and may inform an application's developer about the amount of power being used by the electronic device while the electronic device is running the application. One example may estimate the power being used by an OLED display screen of an electronic device by determining the content of images being displayed during a duration. The estimated power may then be presented to a user. The estimated power may be used in decisions to modify or change parameters of the screen or other device components.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: July 13, 2021
    Assignee: Apple Inc.
    Inventors: Abhinav Pathak, Conor J. O'Reilly, Shashi K. Dua, Udaykumar R. Raval, Christopher W. Chaney, Amit K. Vyas, Albert S. Liu, Roberto Alvarez, Rohit Mundra, Vladislav Sahnovich, Patrick Y. Law, Paul M. Thompson, Paolo Sacchetto, Chaohao Wang, Arthur L. Spence, Jean-Pierre Simon Guillou, Mohammad Ali Jangda, Christopher Edward Glazowski, Yifan Zhang, Prajakta S. Karandikar, Han Ming Ong
  • Publication number: 20210118349
    Abstract: An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.
    Type: Application
    Filed: September 9, 2020
    Publication date: April 22, 2021
    Inventors: Myungjoon Choi, Kingsuk Brahma, Li-Xuan Chuo, Mohammad Ali Jangda, Hyunsoo Kim, Hyunwoo Nho, Alex H. Pai, Jesse Aaron Richmond, Jie Won Ryu, Shiping Shen, Chaohao Wang
  • Patent number: 10984752
    Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: April 20, 2021
    Assignee: Apple Inc.
    Inventors: Koorosh Aflatooni, Minhyuk Choi, Mohammad Ali Jangda, Sang Y. Youn, Yafei Bi, Jean-Pierre Guillou, Wei Y. Yao
  • Publication number: 20200335040
    Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.
    Type: Application
    Filed: February 26, 2020
    Publication date: October 22, 2020
    Inventors: Hyunwoo Nho, Myungjoon Choi, Hyunsoo Kim, Mohammad Ali Jangda, Jie Won Ryu, Shiping Shen, Kingsuk Brahma, Chaohao Wang, Wei H. Yao, Alex H. Pai