Granted Patent B2

US 12,412,498 · App. 18/529,273 · Granted Sep 9, 2025

Inventors: JaeSung Jeon (Seoul, KR); Hyeonju Park (Incheon, KR); Hyeonwoo Lee (Daegu, KR)

Assignee: LG DISPLAY CO., LTD.

G09G3/035G09G2320/04

Abstract

Claims (48)

1. An optical compensating method for a display panel, comprising:

generating initial flat data for the display panel when the display panel is in a flat state displaying a test image;

generating initial curve data for the display panel in a curved state displaying the test image;

extracting point data for a plurality of points in the initial flat data and the initial curve data;

generating deviation data using the point data;

generating a curve data map by applying weights according to curvatures at each point to the deviation data;

generating final curve data by applying the curve data map to the initial curve data; and

generating compensation data from the final curve data,

wherein the point data include data extracted from an inner area except for an edge area in the initial flat data and the initial curve data.

2. The optical compensating method of claim 1 , further comprising normalizing the initial flat data and the initial curve data before extracting the point data.

3. The optical compensating method of claim 1 , wherein the point data are data extracted on N×M matrix points positioned on the initial flat data and the initial curve data.

4. The optical compensating method of claim 1 , wherein generating the deviation data generates the deviation data by dividing the point data of the initial flat data by the point data of the initial curve data, or generates the deviation data by dividing the point data of the initial curve data by the point data of the initial flat data.

5. The optical compensating method of claim 1 , wherein generating the curve data map includes:

applying a fixed weight according to a bending angle to deviation data of a flat area; and

applying a variable weight according to the bending angle to deviation data of a curved area.

6. The optical compensating method of claim 5 , wherein the variable weight is generated by applying interpolation between the fixed weight and a reference weight.

7. The optical compensating method of claim 6 , wherein the reference weight is for a point line with a maximum curvature.

8. The optical compensating method of claim 5 , wherein generating the curve data map further includes removing a portion of data positioned in an edge area.

9. The optical compensating method of claim 1 , wherein generating the final curve data multiplies the initial curve data by the curve data map.

10. The optical compensating method of claim 1 , wherein generating the compensation data generates a value for compensating of a deviation between the test image and the final curve data.

11. The optical compensating method of claim 10 , further comprising supplying the test image to the display panel.

12. The optical compensating method of claim 1 , wherein the compensation data includes:

first compensation data generated from a low-grayscale test image of 40 grayscale or less; and

second compensation data generated from a high-grayscale test image of 150 grayscale or more.

13. An optical compensating device, comprising:

a camera configured to generate a photographed image for a display panel displaying a test image;

a data converting module configured to convert a flat photographed image and a curve photographed image into initial flat data and initial curve data;

a deviation data generating module configured to generate deviation data for the initial flat data and the initial curve data using point data for a plurality of points;

a curve data map generating module configured to generate a curve data map by applying weights according to curvature at each point to the deviation data;

a final curve data generating module configured to generate final curve data by applying the curve data map to the initial curve data; and

a compensation data generating module configured to generate compensation data using the final curve data,

wherein the point data include data extracted from an inner area except for an edge area in the initial flat data and the initial curve data.

14. The optical compensating device of claim 13 , further comprising a test image generating module configured to generate the test image and supplying the test image to the display panel.

15. The optical compensating device of claim 13 , further comprising a weight table configured to store weight data according to the curvature of the display panel.

16. A display device, comprising:

a display panel including a plurality of subpixels having a light emitting element;

a gate driving circuit configured to supply a plurality of scan signals to the display panel;

a data driving circuit configured to supply a data voltage to the display panel;

a memory configured to store compensation data; and

a timing controller configured to compensate for the data voltage using the compensation data, wherein the compensation data is generated by:

generating initial flat data for the display panel in a flat state displaying a test image;

generating initial curve data for the display panel in a curved state displaying the test image;

extracting point data for a plurality of points in the initial flat data and the initial curve data;

generating deviation data using the point data;

generating a curve data map by applying weights according to curvature at each point to the deviation data;

generating final curve data by applying the curve data map to the initial curve data; and

generating compensation data from the final curve data,

wherein the point data include data extracted from an inner area except for an edge area in the initial flat data and the initial curve data.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (15)