Patents by Inventor Thomas Charisoulis

Thomas Charisoulis 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).

  • Publication number: 20230360593
    Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.
    Type: Application
    Filed: July 11, 2023
    Publication date: November 9, 2023
    Inventors: Hjalmar Edzer Ayco Huitema, Thomas Charisoulis, Xia Li
  • Patent number: 11749180
    Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: September 5, 2023
    Assignee: Apple Inc.
    Inventors: Hjalmar Edzer Ayco Huitema, Thomas Charisoulis, Xia Li
  • Publication number: 20230086380
    Abstract: A display system of a display includes multiple primary light emitting diodes and multiple secondary light emitting diodes. The multiple primary light emitting diodes may emit light, in which at least a first primary light emitting diode of the multiple primary light emitting diodes is shorted. Moreover, the multiple secondary light emitting diodes may emit light. At least a first secondary light emitting diode of the multiple secondary light emitting diodes is associated with the first primary light emitting diode, and the first secondary light emitting diode may emit light based at least in part on the first primary light emitting diode being shorted.
    Type: Application
    Filed: August 12, 2022
    Publication date: March 23, 2023
    Inventors: Thomas Charisoulis, Saif Choudhary, Xia Li, Tore Nauta, Kapil V Sakariya
  • Publication number: 20230089957
    Abstract: A display device includes a voltage source that provides a voltage and a current source that provides a current. The display device also includes light emitting diodes (LEDs) that emit light to display an image on the display device. Additionally, the display device includes pixel driving circuitry that drives the LEDs using the voltage or the current. In particular, the pixel driving circuitry provides the LEDs with the voltage from the voltage source for a first period of time to enable the LEDs to reach an illumination threshold. Moreover, the pixel driving circuitry, after providing the voltage from the voltage source for the first period of time, drives the LEDs using the current from the current source to cause the LEDs to emit light substantially uninterrupted when changing between providing the voltage from the voltage source to driving the one or more LEDs using the current source.
    Type: Application
    Filed: August 12, 2022
    Publication date: March 23, 2023
    Inventors: Thomas Charisoulis, Saif Choudhary, Tore Nauta
  • Publication number: 20230091644
    Abstract: A display system of a display includes a first light emitting diode, a second light emitting diode, a current source, and at least one transistor. The first and the second light emitting diodes emit light. The current source provides a constant current to the first light emitting diode and the second light emitting diode. Moreover, the at least one transistor removes the current or shunts the current towards the first light emitting diode, the second light emitting diode, or both. Removing the current or shunting the current towards the first light emitting diode, the second light emitting diode, or both, may blend outputs of the first light emitting diode and the second light emitting diode.
    Type: Application
    Filed: June 29, 2022
    Publication date: March 23, 2023
    Inventors: Thomas Charisoulis, Saif Choudhary, Xia Li, Tore Nauta
  • Publication number: 20220366838
    Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.
    Type: Application
    Filed: May 5, 2022
    Publication date: November 17, 2022
    Inventors: Hjalmar Edzer Ayco Huitema, Thomas Charisoulis, Xia Li
  • Patent number: 11355056
    Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: June 7, 2022
    Assignee: Apple Inc.
    Inventors: Hjalmar Edzer Ayco Huitema, Thomas Charisoulis, Xia Li
  • Publication number: 20210272510
    Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.
    Type: Application
    Filed: January 28, 2021
    Publication date: September 2, 2021
    Inventors: Hjalmar Edzer Ayco Huitema, Thomas Charisoulis, Xia Li
  • Patent number: 10923023
    Abstract: Hybrid chiplets, display backplanes, and displays with integrated hybrid chiplets are described. In an embodiment, a hybrid chiplet includes a micro LED chiplet stacked on a micro driver chiplet that includes at least one drive transistor and a bottom side including a plurality of bottom chiplet contacts for electrical connection with a display backplane.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: February 16, 2021
    Inventors: Andreas Bibl, Xia Li, John A. Higginson, Vaibhav D. Patel, Kapil V. Sakariya, Imran Hashim, Tore Nauta, Thomas Charisoulis
  • Patent number: 10762836
    Abstract: An electronic display row drivers or column drivers that send reference currents or voltages to microdrivers to be used to drive micropixels to particular levels. The microdrivers, in turn, ship current to micropixels that display images based at least in part on the shipped current.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: September 1, 2020
    Assignee: Apple Inc.
    Inventors: Hopil Bae, Wei H. Yao, Mohammad B. Vahid Far, Yafei Bi, Xiaofeng Wang, Thomas Charisoulis, Hasan Akyol, Henry C. Jen, Derek K. Shaeffer
  • Patent number: 10650737
    Abstract: Systems and apparatuses for hybrid micro-driver architectures having time multiplexing for driving displays are described. In one embodiment, a display (e.g., hybrid display architecture) includes a backplane and a micro-driver circuitry that is coupled to the backplane. The backplane includes circuitry (e.g., sample and hold circuitry) for sampling and holding analog data and for time multiplexing analog data. The micro-driver circuitry includes at least a capacitor of a ramp generator for generating a ramp voltage based on the analog data of the backplane and drive circuitry to cause at least one emission pulse for emitting a display element.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: May 12, 2020
    Assignee: Apple Inc.
    Inventors: Mohammad B. Vahid Far, Yafei Bi, Kapil V. Sakariya, Hopil Bae, Shinya Ono, Thomas Charisoulis, Chin-Wei Lin
  • Patent number: 10395594
    Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including ?LED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., ?Driver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit including emission logic, the emission logic including comparator logic to compare a data voltage from a storage capacitor to a voltage ramp provided via the TFT backplane, the comparator logic to cause the emission logic to generate an emission pulse to an LED device, and wherein the integrated circuit is to switch and drive a plurality of LED devices. In one embodiment each of the plurality of LED devices is a subpixel for a display device.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: August 27, 2019
    Assignee: Apple Inc.
    Inventors: Thomas Charisoulis, Tore Nauta, Kapil Sakariya, Jean-Jacques P. Drolet
  • Publication number: 20180247586
    Abstract: Systems and apparatuses for hybrid micro-driver architectures having time multiplexing for driving displays are described. In one embodiment, a display (e.g., hybrid display architecture) includes a backplane and a micro-driver circuitry that is coupled to the backplane. The backplane includes circuitry (e.g., sample and hold circuitry) for sampling and holding analog data and for time multiplexing analog data. The micro-driver circuitry includes at least a capacitor of a ramp generator for generating a ramp voltage based on the analog data of the backplane and drive circuitry to cause at least one emission pulse for emitting a display element.
    Type: Application
    Filed: September 21, 2016
    Publication date: August 30, 2018
    Inventors: Mohammad B. Vahid Far, Yafei Bi, Kapil V. Sakariya, Hopil Bae, Shinya Ono, Thomas Charisoulis, Chin-Wei Lin