US 10,762,820 B2Granted

Inversion balancing compensation

AssigneeApple Inc.

InventorsChristopher P. Tann, Taesung Kim, Sandro H. Pintz

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Abstract

System and method for improving displayed image quality of an electronic display that displays a first image frame by applying a first voltage to a display pixel and a second image frame directly before the first image frame by applying a second voltage to the display pixel. A display pipeline is communicatively coupled to the electronic display and receives first image data corresponding with the first image frame, where the image data includes a first grayscale value corresponding with the display pixel. Additionally the display pipeline determines an inversion balancing grayscale offset based at least in part on the first grayscale value when polarity of the first voltage and polarity of the second voltage are the same and determines magnitude of the first voltage by applying the inversion balancing grayscale offset to the first grayscale value to reduce likelihood of a perceivable luminance spike when displaying the first image frame.

Claims20

Dependent claims

A computing device comprising:

image processing circuitry configured to:
process a first plurality of active lines in first image data to determine first processed image data corresponding with a first image, wherein the first image data comprises the first plurality of active lines and a first plurality of blank lines;
adjust a counter value indicative of pixel polarization from a first counter value to a second counter value based at least in part on number of active lines and number of blank lines included in the first image data;
and
process a second plurality of active lines in second image data based at least in part on the second counter value indicative of pixel polarization present after display of the first image to determine second processed image data corresponding with a second image;
and
a display panel communicatively coupled to the image processing circuitry, wherein the display panel is configured to:
display the first image at least in part by applying a first voltage to a pixel based on the first processed image data;
and
display the second image at least in part by applying a second voltage to the pixel based on the second processed image data.

7 more elements

A tangible, non-transitory, computer-readable medium storing instructions executable by processing circuitry of a computing device, wherein the instructions comprise instructions to:

instruct, using the processing circuitry, a display panel to display a first image based at least in part on first image data comprising a first plurality of active lines and a first plurality of blank lines;
adjust, using the processing circuitry, a counter value indicative of pixel polarization from a first counter value to a second counter value based at least in part on number of active lines and number of blank lines included in the first image data;
determine, using the processing circuitry, processed image data at least in part by processing a second plurality of active lines in second image data corresponding with a second image to be displayed after the first image based at least in part on the second counter value indicative of pixel polarization present after display of the first image;
and
instruct, using the processing circuitry, the display panel to display the second image based at least in part on the processed image data.

2 more elements

An electronic display comprising:

a display panel configured to display a first image based at least in part on first processed image data followed by a second image based at least in part on second processed image data;
and
a timing controller communicatively coupled to the display panel, wherein the timing controller is configured to:
determine the first processed image data by processing first image data comprising a first plurality of active lines and a first plurality of blank lines;
adjust a counter value indicative of pixel polarization from a first counter value to a second counter value based at least in part on number of active lines and number of blank lines included in the first image data;
and
determine the second processed image data by processing second image data comprising a second plurality of active lines and a second plurality of blank lines based at least in part on the second counter value indicative of pixel polarization present after display of the first image.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/269,439Filed 6 Feb 2019 · continuation
Priority: 25 Jun 2014
Published: US 2019/0172380 A16 Jun 2019
Granted: 1 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G09G 3/20
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: for presentation of an…
G09G 2310/0254
Details of the generation of driving signals: control of polarity reversal in general, other than for liquid crystal displays
G09G 2310/063
For resetting or blanking: waveforms for resetting the whole screen at once
G09G 2310/08
Command of the display device: details of timing specific for flat panels, other than clock recovery

Family

Application62/017,081Us provisional application · filed 25 Jun 2014
Application14/725,545Parent of this continuation-in-part · filed 29 May 2015
Application14/986,181Parent of this continuation · filed 31 Dec 2015
US 9,767,726 B2Parent of this continuation-in-part · filed 19 Sep 2017
Application15/812,868Parent of this continuation · filed 14 Nov 2017
US 9,984,608 B2Parent of this continuation · filed 29 May 2018
US 2019/0172380 A1Pre-grant publication · published 6 Jun 2019
US 10,229,622 B2Parent of this continuation
Application14/986,181Parent of this continuation-in-part
US 2015/0379918 A1Published application
US 2016/0117971 A1Published application
US 2018/0068605 A1Published application
US 10,762,820 B2This patent

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