1
Arokia Nathan, Gholamreza Chaji: Stable driving scheme for active matrix displays. Ignis Innovation, Stratford Managers Corporation, November 13, 2018: US10127860

A method and system for operating a pixel array having at least one pixel circuit is provided. The method includes repeating an operation cycle defining a frame period for a pixel circuit, including at each frame period, programming the pixel circuit, driving the pixel circuit, and relaxing a stress ...


2
Gholamreza Chaji, Yaser Azizi: Display systems with compensation for line propagation delay. Ignis Innovation, Stratford Managers Corporation, January 8, 2019: US10176738

A method for characterizing and eliminating the effect of propagation delay on data and monitor lines of AMOLED panels is introduced. A similar technique may be utilized to cancel the effect of incomplete settling of select lines that control the write and read switches of pixels on a row.


3
Gholamreza Chaji, Mehdi Torbatian: Re-interpolation with edge detection for extracting an aging pattern for AMOLED displays. Ignis Innovation, Stratford Managers Corporation, February 5, 2019: US10198979

A method that includes an initial uniform pixel measurement and interpolation followed by an edge detection algorithm to recognize the areas that contribute mostly to the estimation error due to the interpolation. The pixels on the detected edges and around their vicinity are also measured, and an a ...


4
Gholamreza Chaji, Yaser Azizi: System and methods for extraction of threshold and mobility parameters in AMOLED displays. Ignis Innovation, Stratford Managers Corporation, November 13, 2018: US10127846

A system to improve the extraction of transistor and OLED parameters in an AMOLED display includes a pixel circuit having an organic light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input to provide the programming signal, and ...


5
Gholamreza Chaji: Compensation for color variations in emissive devices. Ignis Innovation, Stratford Managers Corporation, January 15, 2019: US10181282

What is disclosed are methods and systems for color compensation in the context of emissive displays. A set of virtual sub-pixels are defined and color points allocated for the various types of virtual sub-pixels to enable color processing within a modified color gamut, shifting the color of pixels ...


6
Gholamreza Chaji, Mehdi Torbatian: Correction for localized phenomena in an image array. Ignis Innovation, Stratford Managers Corporation, January 22, 2019: US10186190

A method and system of compensating for localized phenomena in a display is disclosed. The display includes an array of pixels and a control system for adjusting content data signals for the array of pixels to compensate for aging of the pixels in the array. The control system measures a parameter o ...


7
Gholamreza Chaji: Display system using system level resources to calculate compensation parameters for a display module in a portable device. Ignis Innovation, Stratford Managers Corporation, January 29, 2019: US10192479

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 c ...


8
Gholamreza Chaji: Pixel circuits for AMOLED displays. Ignis Innovation, Stratford Managers Corporation, November 27, 2018: US10140925

A system is provided for controlling an array of pixels in a display in which each pixel includes a light-emitting device and a reference voltage source that controllably supplies a reference voltage having a magnitude that turns off the light-emitting device. While the reference voltage is coupled ...


9
Gholamreza Chaji: System and methods for extracting correlation curves for an organic light emitting device. Ignis Innovation, Stratford Managers Corporation, December 25, 2018: US10163401

A method of compensating for efficiency degradation of an OLED in an array-based semiconductor device having arrays of pixels that include OLEDs, including determining for a plurality of operating conditions interdependency curves relating changes in an electrical operating parameter of said OLEDs a ...


10
Gholamreza Chaji: System and methods for extracting correlation curves for an organic light emitting device. Ignis Innovation, Stratford Managers Corporation, January 8, 2019: US10176736

A system determines the efficiency degradation of organic light emitting devices (OLEDs) in multiple array-based semiconductor devices having arrays of pixels that include OLEDs. The system determines the relationship between changes in an electrical operating parameter of the OLEDs and the efficien ...