US 11,908,376 B1Granted

Compensation schemes for 1x1 sub-pixel uniformity compensation

AssigneeApple Inc.

InventorsLingtao Wang, Giovanni Carbone, Chaohao Wang, Enkhamgalan Dorjgotov, Sheng Zhang, Jim C Chou, Shereef Shehata, Yung-Chin Chen

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Abstract

A compensation system includes a processor configured to determine compensated data for display on a sub-pixel of the display device. The processor may receive image data configured to be displayed on the sub-pixel, convert the gray level data to first voltage data; fetch, from a memory, compressed 1×1 sub-pixel uniformity compensation data for the sub-pixel, and decompress the compressed 1×1 sub-pixel uniformity compensation data via a decompressor. The decompressed data comprises the 1×1 sub-pixel uniformity compensation data for the sub-pixel. The processor may also determine a voltage compensation offset value associated with the sub-pixel based on the second voltage data, generate compensated voltage data based in part on the voltage compensation offset value and the first voltage data, convert the compensated voltage data to compensated gray level data; and transmit the compensated gray level data to pixel driving circuitry associated with the sub-pixel.

Claims20

Dependent claims

A display device comprising:

a display panel comprising:
a group of pixels, wherein each of the group of pixels comprise one or more pixels that each control a luminance of a color component of a corresponding pixel;
and
display driving circuitry configured to program, onto the group of pixels, image data to be displayed via the group of pixels;
a processor;
and
a memory accessible by the processor;
wherein the processor is configured to:
receive image data configured to be displayed via the group of pixels, wherein the image data comprises gray level data for a first pixel of the group of pixels;
convert the gray level data to first voltage data;
fetch second voltage data from encoding data of a compensation map, the second voltage data comprising 1×1 pixel uniformity compensation data for at least a portion of the group of pixels including the first pixel, wherein the 1×1 pixel uniformity compensation data comprises compensation data to mitigate non-uniformity between at least a portion of the group of pixels when supplied with a same electrical input signal and wherein the second voltage data is configured to be inputted to a look-up table configured to decode the second voltage data into voltage compensation data for the first pixel, and wherein the look-up table stores at least one voltage compensation offset value corresponding to the 1×1 pixel uniformity compensation data for the one or more pixels of the group of pixels;
determine a voltage compensation offset value associated with the first pixel based on the second voltage data;
generate compensated voltage data based in part on the voltage compensation offset value and the first voltage data;
convert the compensated voltage data to compensated gray level data;
and
transmit the compensated gray level data to the display driving circuitry associated with the first pixel.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/710,133Filed 31 Mar 2022 · us provisional application
Priority: 6 Apr 2021
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G09G 3/2092
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 5/06
Characterised by the way in which colour is displayed: using colour palettes, e.g. look-up tables
G09G 3/2003
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 3/2074
Display of intermediate tones: using sub-pixels

Family

Application63/171,451Us provisional application · filed 6 Apr 2021
US 11,908,376 B1This patent

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

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