# US 12,002,394 B2 · Display system and method of compensating image of display panel using the same

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- Number: US 12,002,394 B2
- Document ID: US12002394B2
- Status: Granted
- Kind: B2
- Application number: 17/399,438
- Filed: 2021-08-11
- Published: 2022-02-17
- Granted: 2024-06-04
- Earliest claimed: 2020-08-12
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Yong-Jin Shin; Kyunho Kim; Dongin Kim; Hyoung-Wook Kim; Bongim Park; Soohoon Lee
- Web page: https://patentgrep.com/patent/US12002394B2

## 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 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/029: by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
- G09G 2320/0295: by monitoring each display pixel
- G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change
- G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data
- G09G 2370/08: Details of image data interface between the display device controller and the data line driver circuit
- 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 system includes a measurer, a measured data filter and a compensation data generator. The measurer measures an image at a measuring point of a display panel to generate measured data. The measured data filter removes a false measured data outside an allowable range among the measured data. The compensation data generator generates representative compensation data compensating the image based on the measured data in which the false measured data is removed.

## Claims

### Claim 1

A display system comprising:
a measurer which measures an image at a measuring point of a display panel to generate measured data;
a measured data filter which receives the measured data from the measurer, determines a false measured data, which is outside an allowable range, among the measured data as a noise, and removes the false measured data from the measured data; and
a compensation data generator which generates representative compensation data for compensating the image based on the measured data in which the false measured data is removed,
wherein the measured data filter removes a data outside a second allowable range among second data measured at adjacent measuring points in a measuring point group of the measurer and replaces the removed data with replacement data.

### Claim 2 (depends on 1)

The display system of claim 1, further comprising:
an interpolator which interpolates the representative compensation data corresponding to the measuring point of the display panel to generate an interpolation compensation data.

### Claim 3 (depends on 2)

The display system of claim 2, further comprising:
an extrapolator which generates an extrapolation compensation data corresponding to a display area outside an outermost measuring point based on an outermost representative compensation data corresponding to the outermost measuring point.

### Claim 4 (depends on 3)

The display system of claim 3, further comprising:
a data outputter which compensates input image data based on the representative compensation data, the interpolation compensation data and the extrapolation compensation data to generate a data signal.

### Claim 5 (depends on 4)

The display system of claim 4, further comprising:
a driving controller which generates the data signal based on the input image data;
a gate driver which outputs a gate signal to a gate line of the display panel; and
a data driver which outputs a data voltage to a data line of the display panel based on the data signal,
wherein the driving controller comprises the interpolator, the extrapolator and the data outputter.

### Claim 6 (depends on 4)

The display system of claim 4, further comprising:
a driving controller which generates the data signal based on the input image data;
a gate driver which outputs a gate signal to a gate line of the display panel; and
a data driver which outputs a data voltage to a data line of the display panel based on the data signal,
wherein the driving controller comprises the measured data filter, the compensation data generator, the interpolator, the extrapolator and the data outputter.

### Claim 7 (depends on 1)

The display system of claim 1, wherein the measured data filter removes a data outside a first allowable range among first data measured multiple times by a first unit measurer of the measurer.

### Claim 8 (depends on 7)

The display system of claim 7, wherein when an average of the first data is denoted by m1, a first standard deviation of the first data is denoted by σ1, a predetermined first tolerance coefficient is denoted by t1 and the first data is denoted by x, the first allowable range of the first data corresponds to the following inequality: m1−t1*σ1<x<m1+t1*σ1.

### Claim 9 (depends on 1)

The display system of claim 1, wherein when an average of the second data is denoted by m2, a second standard deviation of the second data is denoted by σ2, a predetermined second tolerance coefficient is denoted by t2 and the second data is denoted by y, the second allowable range of the second data corresponds to the following inequality: m2−t2*σ2<y<m2+t2*σ2.

### Claim 10 (depends on 1)

The display system of claim 1, wherein the replacement data is the average of the second data.

### Claim 11 (depends on 1)

The display system of claim 1, wherein the replacement data is an average of values of the second data in the second allowable range.

### Claim 12 (depends on 1)

The display system of claim 1, wherein a size of the measuring point group in an edge portion of the display panel is smaller than a size of the measuring point group in a central portion of the display panel.

### Claim 13 (depends on 12)

The display system of claim 12, wherein a size of the measuring point group in a corner portion of the display panel is smaller than the size of the measuring point group in the edge portion of the display panel.

### Claim 14

A display system comprising:
a measurer which measures an image at a measuring point o a display panel to generate measured data;
a measured data filter which removes a false measured data exceeding an allowable range among the measured data; and
a compensation data generator which generates representative compensation data compensating the image based on the measured data in which the false measured data is removed,
wherein the measured data filter comprises:
a single measurer filter which removes a data outside a first allowable range among first data measured multiple times by a first unit measurer of the measurer; and
a multi measuring point filter which replaces data outside a second allowable range among second data measured at adjacent measuring points in a measuring point group of the measurer with replacement data.

### Claim 15 (depends on 14)

The display system of claim 14, wherein when an average of the first data is denoted by m1, a first standard deviation of the first data is denoted by σ1, a predetermined first tolerance coefficient is denoted by t1 and the first data is denoted by x, the first allowable range of the first data corresponds to the following inequality: m1−t1*σ1<x<m1+t1*σ1, and
wherein when a second average of the second data is denoted by m2, a second standard deviation of the second data is denoted by σ2, a predetermined second tolerance coefficient is denoted by t2 and the second data is denoted by y, the second allowable range of the second data corresponds to the following inequality: m2−t2*σ2<y<m2+t2*σ2.

### Claim 16 (depends on 15)

The display system of claim 15, wherein the first tolerance coefficient is less than the second tolerance coefficient.

### Claim 17

A method of compensating an image of a display panel, the method comprising:
measuring an image at a measuring point of the display panel to generate measured data;
determining, as a noise, a false measured data, which is outside an allowable range, among the measured data generated by measuring the image at the measuring point of the display panel, and removing the false measured data from the measured data;
generating representative compensation data for compensating the image based on the measured data in which the false measured data is removed;
interpolating the representative compensation data corresponding to the measuring point of the display panel to generate an interpolation compensation data; and
generating an extrapolation compensation data corresponding to a display area outside an outermost measuring point based on an outermost representative compensation data corresponding to the outermost measuring point,
wherein the removing the false measured data comprises:
removing a data outside a second allowable range among second data measured at adjacent measuring points in a measuring point group of a measurer; and
replacing the removed data with replacement data.

### Claim 18 (depends on 17)

The method of claim 17, wherein the removing the false measured data comprises removing a data outside a first allowable range among first data measured multiple times by a first unit measurer.