# US 2022/0044619 A1 · Display device and method of driving the same

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- Number: US 2022/0044619 A1
- Document ID: US20220044619A1
- Status: Published application
- Kind: A1
- Application number: 17/197,982
- Filed: 2021-03-10
- Published: 2022-02-10
- Earliest claimed: 2020-08-06
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Young Soo SOHN; Jong Man KIM; Sung Mo YANG; Seung Young CHOI
- Web page: https://patentgrep.com/patent/US20220044619A1

## CPC

- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)}
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2320/043: Preventing or counteracting the effects of ageing
- G09G 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof
- G09G 2320/048: using evaluation of the usage time
- G09G 2320/0626: for control of overall brightness
- G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A display device according to an embodiment includes a display panel including a plurality of pixels, and an image sticking compensator configured to generate a second image data by reflecting an age data accumulated in a first image data input from an external source. The image sticking compensator generates the age data by accumulating a deterioration data generated by reflecting a frequency weight corresponding to a determined frequency of a previous frame to an image data of the previous frame after the image data of the previous frame is stored.

## Claims

### Claim 1

A display device comprising:
a display panel including a plurality of pixels; and
an image sticking compensator configured to generate a second image data by reflecting an age data accumulated in a first image data input from an external source,
wherein the image sticking compensator generates the age data by accumulating a deterioration data generated by reflecting a frequency weight corresponding to a determined frequency of a previous frame to an image data of the previous frame after the image data of the previous frame is stored.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the image data of the previous frame is a scaled first image data provided to the previous frame.

### Claim 3 (depends on 2)

The display device according to claim 2, further comprising:
a gate driver configured to provide a scan signal to the display panel through a plurality of gate lines;
a data driver configured to provide a data signal corresponding to the second image data to the display panel through a plurality of data lines; and
a timing controller configured to control driving of the gate driver and the data driver,
wherein the timing controller determines a frequency of the previous frame and calculates the frequency weight by reflecting the determined frequency.

### Claim 4 (depends on 3)

The display device according to claim 3, wherein the image sticking compensator includes a scaling ratio calculator configured to calculate a scaling ratio of the display panel.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the image sticking compensator generates the scaled first image data by calculating the scaling ratio and the first image data.

### Claim 6 (depends on 5)

The display device according to claim 5, wherein the image sticking compensator comprises:
an age data generator configured to generate the age data based on the scaled first image data; and
a memory configured to store the accumulated age data and image data of the previous frame.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein the memory comprises:
a first memory configured to store the accumulated age data; and
a second memory configured to store the image data of the previous frame.

### Claim 8 (depends on 7)

The display device according to claim 7, wherein the age data generator generates the deterioration data by multiplying the image data of the previous frame by the frequency weight, and generates an age data accumulated up to the previous frame by reflecting the accumulated age data on the deterioration data.

### Claim 9 (depends on 8)

The display device according to claim 8, wherein the image sticking compensator outputs the second image data based on the age data which is accumulated up to the previous frame and the scaled first image data.

### Claim 10 (depends on 9)

The display device according to claim 9, wherein the age data generator updates the age data of the previous frame in the first memory.

### Claim 11

A display device comprising:
a display panel including a plurality of pixels;
a scaling ratio calculator configured to calculate a scaling ratio of the display panel;
a luminance corrector configured to generate a scaled first image data by calculating a first image data and the scaling ratio;
an age data generator configured to generate an age data based on the scaled first image data;
a memory configured to store the age data and the scaled first image data of a previous frame;
a compensator configured to output a second image data based on the scaled first image data and the age data;
a gate driver configured to provide a scan signal to the display panel through a plurality of gate lines;
a data driver configured to provide a data signal corresponding to the second image data to the display panel through a plurality of data lines; and
a timing controller configured to control driving of the gate driver and the data driver,
wherein the age data generator generates an age data accumulated up to the previous frame by calculating a deterioration data of one frame to which a frequency weight is applied to a grayscale data of one frame based on the scaled first image data, and a previously accumulated age data.

### Claim 12 (depends on 11)

The display device according to claim 11, wherein the memory comprises:
a first memory configured to store the previously accumulated age data; and
a second memory configured to store the scaled first image data.

### Claim 13 (depends on 12)

The display device according to claim 12, wherein the previously accumulated age data is the age data accumulated up to a previous frame of the previous frame.

### Claim 14 (depends on 13)

The display device according to claim 13, wherein the age data generator generates the deterioration data by multiplying the scaled first image data of the one frame by the frequency weight, and generates the age data accumulated up to the previous frame by reflecting the previously accumulated age data to the deterioration data.

### Claim 15 (depends on 14)

The display device according to claim 14, wherein the compensator outputs the second image data based on the age data accumulated up to the previous frame and the scaled first image data.

### Claim 16

A method of driving a display device, the method comprising steps:
determining a frequency after data of a previous frame is stored;
calculating a frequency weight based on the determined frequency;
receiving a first image data;
generating a scaled first image data by reflecting a scaling ratio on the first image data;
generating a frame deterioration data based on the scaled first image data; and
storing an age data by accumulating the deterioration data, and distinguishing and storing the scaled first image data of the previous frame.

### Claim 17 (depends on 16)

The method according to claim 16, further comprising a step of:
generating an age data which is accumulated up to the previous frame based on the frequency weight, the scaled first image data of the previous frame, and the accumulated age data.

### Claim 18 (depends on 17)

The method according to claim 17, wherein the accumulated age data is an age data which is accumulated up to a previous frame of the previous frame.

### Claim 19 (depends on 18)

The method according to claim 18, further comprising a step of:
updating and storing the age data of the previous frame.

### Claim 20 (depends on 19)

The method according to claim 19, wherein a second image data is output based on the scaled first image data and the age data up to the previous frame.