Patents by Inventor Gholamreza Chaji

Gholamreza Chaji 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).

  • MICRO DEVICE INTEGRATION INTO SYSTEM SUBSTRATE
    Publication number: 20230207611
    Abstract: This disclosure is related to post processing steps for integrating of micro devices into system (receiver) substrate or improving the performance of the micro devices after transfer. Post processing steps for additional structure such as reflective layers, fillers, black matrix or other layers may be used to improve the out coupling or confining of the generated LED light. In another example, dielectric and metallic layers may be used to integrate an electro-optical thin film device into the system substrate with the transferred micro devices. In another example, color conversion layers are integrated into the system substrate to create different output from the micro devices.
    Type: Application
    Filed: March 2, 2023
    Publication date: June 29, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi
  • CIRCUIT AND SYSTEM INTEGRATION ONTO A MICRODEVICE SUBSTRATE
    Publication number: 20230178529
    Abstract: An integrated optical display system includes a backplane with appropriate electronics, and an array of micro-devices. A touch sensing structure may be integrated into the system. In one embodiment, an integrated circuit and system is integrated on top of micro-devices transferred to a substrate. Openings in a planarization layer (or layers) may be provided to connect the micro-devices with electrodes and other circuitry. Light reflectors may be used to redirect the light, and color conversion layers or color filters may be integrated before the micro-devices or on the substrate surface opposite to the surface of micro-devices.
    Type: Application
    Filed: January 30, 2023
    Publication date: June 8, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi, Bahareh Sadeghimakki, Hossein Zamani Siboni
  • CIRCUIT AND SYSTEM INTEGRATION ONTO A MICRODEVICE SUBSTRATE
    Publication number: 20230178528
    Abstract: An integrated optical display system includes a backplane with appropriate electronics, and an array of micro-devices. A touch sensing structure may be integrated into the system. In one embodiment, an integrated circuit and system is integrated on top of micro-devices transferred to a substrate. Openings in a planarization layer (or layers) may be provided to connect the micro-devices with electrodes and other circuitry. Light reflectors may be used to redirect the light, and color conversion layers or color filters may be integrated before the micro-devices or on the substrate surface opposite to the surface of micro-devices.
    Type: Application
    Filed: January 30, 2023
    Publication date: June 8, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi, Bahareh Sadeghimakki, Hossein Zamani Siboni
  • CIRCUIT AND SYSTEM INTEGRATION ONTO A MICRODEVICE SUBSTRATE
    Publication number: 20230170338
    Abstract: An integrated optical display system includes a backplane with appropriate electronics, and an array of micro-devices. A touch sensing structure may be integrated into the system. In one embodiment, an integrated circuit and system is integrated on top of micro-devices transferred to a substrate. Openings in a planarization layer (or layers) may be provided to connect the micro-devices with electrodes and other circuitry. Light reflectors may be used to redirect the light, and color conversion layers or color filters may be integrated before the micro-devices or on the substrate surface opposite to the surface of micro-devices.
    Type: Application
    Filed: January 30, 2023
    Publication date: June 1, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi, Bahareh Sadeghimakki, Hossein Zamani Siboni
  • PASSING SIGNALS THROUGH MICRO DEVICE SIDEWALLS
    Publication number: 20230170317
    Abstract: The present invention relates to structure and formation of side walls in micro devices. The structure allows access of one side of the micro device to another side through conductive layers and pads. In particular, the top and bottom sides of the micro devices are in direction of the current in the device and sidewalls are isolation surfaces surrounding the top and bottom sides of the device.
    Type: Application
    Filed: May 11, 2021
    Publication date: June 1, 2023
    Applicant: VueReal Inc.
    Inventor: Gholamreza CHAJI
  • COUPLING PROBE FOR MICRO DEVICE INSPECTION
    Publication number: 20230152349
    Abstract: The present disclosure describes a probe design to measure cycles of microdevices. In particular, the probe comprises, electrodes, dielectric, stimulating capacitor, voltage stimulating source for time varying stimulating voltage signal and a series switch to control biasing condition. The probe structure further has a probe tip and resting pads (ring shape or otherwise) along with a leveling mechanism and apparatus. The disclosure also describes a method to measure cycles of microdevices using the probe structure.
    Type: Application
    Filed: March 10, 2021
    Publication date: May 18, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza CHAJI, Won Kyu HA
  • PREVENTING ELECTRODE DISCONTINUATION ON MICRODEVICE SIDEWALL
    Publication number: 20230154790
    Abstract: This disclosure relates to the process of etching and treatment of side walls while processing microdevices. One aspect is to fill the device wall indentation with a polymer. The disclosure relates to a method and device with its structure to the process of etching and treatment of sidewalls. The methods of etching, coating, and curing are used.
    Type: Application
    Filed: March 23, 2021
    Publication date: May 18, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza CHAJI, Ehsanollah FATHI
  • OFFSET ALIGNMENT AND REPAIR IN MICRO DEVICE TRANSFER
    Publication number: 20230144191
    Abstract: This invention relates to the process of correcting misalignment and filling voids after a microdevice transfer process. The process involves transfer heads, measurement of offset and misalignment in horizontal, vertical, and rotational errors. An execution of the new offset vector for the next transfer corrects the alignment.
    Type: Application
    Filed: March 30, 2021
    Publication date: May 11, 2023
    Applicant: VueReal Inc.
    Inventor: Gholamreza CHAJI
  • AMOLED displays with multiple readout circuits
    Patent number: 11631371
    Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: April 18, 2023
    Assignee: Ignis Innovation Inc.
    Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
  • Micro device arrangement in donor substrate
    Patent number: 11624770
    Abstract: This disclosure is related to arranging micro devices in the donor substrate by either patterning or population so that there is no interfering with non-receiving pads and the non-interfering area in the donor substrate is maximized. This enables the transfer of micro devices to a receiver substrate with fewer steps.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: April 11, 2023
    Assignee: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi
  • HIGHLY EFFICIENT MICRODEVICES
    Publication number: 20230104412
    Abstract: Methods and structures are disclosed for highly efficient vertical devices. The vertical device comprising a plurality of planar active layers formed on a substrate, at least one of a top layer of the plurality of the layers is formed as a plurality of nano-pillars and a passivation layer formed on a space between the plurality of the nanopillars.
    Type: Application
    Filed: October 19, 2022
    Publication date: April 6, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi, Yunhan Li, Hossein Zamani Siboni
  • Display optimization techniques for micro-LED devices and arrays
    Patent number: 11610535
    Abstract: Systems and methods to achieve desired color accuracy, power consumption, and gamma correction in an array of pixels of a micro-LED display. The method and system provides an array of pixels, wherein each pixel comprising a plurality of sub-pixels arranged in a matrix and a driving circuitry configured to provide an individual emission control signal to each sub-pixel of each pixel in the array of pixels to independently control an emission time and a duty cycle of each sub-pixel.
    Type: Grant
    Filed: October 5, 2021
    Date of Patent: March 21, 2023
    Assignee: VueReal Inc.
    Inventor: Gholamreza Chaji
  • DISPLAY SYSTEM USING SYSTEM LEVEL RESOURCES TO CALCULATE COMPENSATION PARAMETERS FOR A DISPLAY MODULE IN A PORTABLE DEVICE
    Publication number: 20230081884
    Abstract: A system including a display module and a system module. The display module is integrated in a portable device with a display communicatively coupled to one or more of a driver unit, a measurement unit, a timing controller, a compensation sub-module, and a display memory unit. The system module is communicatively coupled to the display module and has one or more interface modules, one or more processing units, and one or more system memory units. At least one of the processing units and the system memory units is programmable to calculate new compensation parameters for the display module during an offline operation.
    Type: Application
    Filed: November 17, 2022
    Publication date: March 16, 2023
    Inventor: Gholamreza Chaji
  • INTEGRATION OF MICRODEVICES INTO SYSTEM SUBSTRATE
    Publication number: 20230078708
    Abstract: In a micro-device integration process, a donor substrate is provided on which to conduct the initial manufacturing and pixelation steps to define the micro devices, including functional, e.g. light emitting layers, sandwiched between top and bottom conductive layers. The microdevices are then transferred to a system substrate for finalizing and electronic control integration. The transfer may be facilitated by various means, including providing a continuous light emitting functional layer, breakable anchors on the donor substrates, temporary intermediate substrates enabling a thermal transfer technique, or temporary intermediate substrates with a breakable substrate bonding layer.
    Type: Application
    Filed: November 9, 2022
    Publication date: March 16, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi
  • High efficient microdevices
    Patent number: 11600743
    Abstract: A microdevice structure comprising at least part of an edge of a microdevice is covered with a metal-insulator-semiconductor (MIS) structure, wherein the MIS structure comprises a MIS dielectric layer and a MIS gate conductive layer, at least one gate pad provided to the MIS gate conductive layer, and at least one micro device contact extended upwardly on a top surface of the micro device.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: March 7, 2023
    Assignee: VueReal Inc.
    Inventors: Gholamreza Chaji, Hossein Zamani Siboni, Ehsanollah Fathi
  • HIGHLY EFFICIENT MICRODEVICES
    Publication number: 20230055752
    Abstract: Methods and structures are disclosed for highly efficient vertical devices. The vertical device comprising a plurality of planar active layers formed on a substrate, at least one of a top layer of the plurality of the layers is formed as a plurality of nano-pillars and a passivation layer formed on a space between the plurality of the nanopillars.
    Type: Application
    Filed: October 19, 2022
    Publication date: February 23, 2023
    Applicant: VueReal Inc.
    Inventors: Gholamreza Chaji, Ehsanollah Fathi, Yunhan Li, Hossein Zamani Siboni
  • System and methods for aging compensation in AMOLED displays
    Patent number: 11580913
    Abstract: A voltage-programmed display system allows measurement of effects on pixels in a panel that includes both active pixels and reference pixels coupled to a supply line and a programming line. The reference pixels are controlled so that they are not subject to substantial changes due to aging and operating conditions over time. A readout circuit is coupled to the active pixels and the reference pixels for reading at least one of current, voltage or charge from the pixels when they are supplied with known input signals. The readout circuit is subject to changes due to aging and operating conditions over time, but the readout values from the reference pixels are used to adjust the readout values from the active pixels to compensate for the unwanted effects.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: February 14, 2023
    Assignee: Ignis Innovation Inc.
    Inventors: Gholamreza Chaji, Joseph Marcel Dionne, Yaser Azizi, Javid Jaffari, Abbas Hormati, Tong Liu, Stefan Alexander
  • Method of integrating functional tuning materials with micro devices and structures thereof
    Patent number: 11581373
    Abstract: The disclosure is related to creating different functional micro devices by integrating functional tuning materials and creating an encapsulation capsule to protect these materials. Various embodiments of the present disclosure also related to improve light extraction efficiencies of micro devices by mounting micro devices at a proximity of a corner of a pixel active area and arranging QD films with optical layers in a micro device structure.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: February 14, 2023
    Assignee: VueReal Inc.
    Inventor: Gholamreza Chaji
  • SYSTEMS AND METHODS OF PIXEL CALIBRATION BASED ON IMPROVED REFERENCE VALUES
    Publication number: 20230038819
    Abstract: What is disclosed are systems and methods of compensation of images produced by active matrix light emitting diode device (AMOLED) and other emissive displays. The electrical output of a pixel is compared with a reference value to adjust an input for the pixel. In some embodiments an integrator is used to integrate a pixel current and a reference current using controlled integration times to generate values for comparison.
    Type: Application
    Filed: October 17, 2022
    Publication date: February 9, 2023
    Inventor: Gholamreza Chaji
  • Method and system for driving light emitting display
    Patent number: RE49389
    Abstract: A display system includes a driver for operating a panel having a plurality of pixels arranged by a plurality of first lines and at least one second line The driver includes a driver output unit for providing to the panel a single driver output for activating the plurality of first lines, the single driver output being demultiplexed on the panel to activate each first line.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: January 24, 2023
    Assignee: Ignis Innovation Inc.
    Inventors: Gholamreza Chaji, Kongning Li, Vasudha Gupta, Arokia Nathan