US 9,311,859 B2Granted

Resetting cycle for aging compensation in AMOLED displays

AssigneeIgnis Innovation Inc.

InventorsGholamreza Chaji, Joseph Marcel Dionne, Yaser Azizi, Javid Jaffari, Abbas Hormati, Tong Liu, Stefan Alexander

Life of this patent

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Abstract

A method of voltage-programming a pixel circuit in a display panel to remove, before programming the pixel circuit, effects due to short-term effects such as caused by fast light transitions or effects due to previous pixel circuit measurements such as charge trapping. During a resetting cycle, the pixel circuit is programmed with a reset voltage value corresponding to a maximum or a minimum voltage value. Then, during a calibration cycle, the pixel circuit is programmed with a calibration voltage based on previously extracted data for the pixel circuit, a pixel current of the pixel circuit is measured, and the extracted data for the pixel circuit is updated based on the measured pixel current. Then, the pixel circuit is programmed with a video data that is calibrated with the updated extracted data. The pixel circuit is finally driven according to the programmed video data and emits a commensurate amount of light.

Claims2

Dependent claims

A method of voltage programming a pixel circuit in a display panel, comprising:

driving the pixel circuit according to programmed video data to display an image in the display panel;
during a resetting cycle following the driving of the pixel circuit, programming the pixel circuit with a reset voltage value corresponding to a maximum or a minimum voltage value, to reduce the effect on a calibration cycle of adverse artifacts resulting from the driving of the pixel circuit;
responsive to the resetting cycle, during the calibration cycle, programming the pixel circuit with a calibration voltage based on previously extracted data for the pixel circuit, measuring a pixel current of the pixel circuit, and updating the extracted data for the pixel circuit based on the measured pixel current;
responsive to the calibration cycle, during a programming cycle, programming the pixel circuit with video data that is calibrated with the updated extracted data;
and
responsive to the programming cycle, during a driving cycle, driving the pixel circuit according to the programmed video data to display an image in the display panel.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/890,926Filed 9 May 2013 · continuation in part
Priority: CA 268887030 Nov 2009
Published: US 2013/0235023 A13 Oct 2013
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G09G 3/006
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: electronic inspection or…
G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3258
Using an active matrix: with pixel circuitry controlling the voltage across the light-emitting element
G09G 3/3291
Details of drivers for data electrodes: in which the data driver supplies a variable data voltage for setting the current through, or the voltage…

Family

Application12/956,842Parent of this continuation-in-part · filed 30 Nov 2010
Application13/869,399Parent of this continuation-in-part · filed 24 Apr 2013
US 2013/0257845 A1Pre-grant publication · published 3 Oct 2013
US 8,914,246 B2Parent of this continuation-in-part
US 2011/0130981 A1Published application
US 2013/0235023 A1Published application
US 9,384,698 B2Related patent
US 9,311,859 B2This patent

From the US filing history. Foreign family members aren’t listed.