CN-118865885-B - Display panel correction method and device

CN118865885BCN 118865885 BCN118865885 BCN 118865885BCN-118865885-B

Abstract

The invention discloses a correction method and device of a display panel, wherein the method comprises the steps of obtaining brightness data of each area of the display panel, carrying out brightness correction on an area to be spliced with a target splicing area according to the brightness data of the target splicing area in each area, and correcting the brightness data of the area to be spliced into corrected brightness data according to the ratio by comparing the ratio of the brightness data of edges of the target splicing area and the area to be spliced, which are close to each other. The method can remarkably reduce the uneven brightness phenomenon among all areas, remarkably improve the problem of splicing lines, improve the overall display uniformity of the display panel, enable spliced pictures to be smoother and more uniform, and particularly remarkably improve the brightness uniformity and display effect of large-size OLED display equipment, improve user experience and have higher practicability and market prospect.

Inventors

XUE HUILING
WANG GANG
XIONG XING
HAN CHUANYUN
MIAO LIANG

Assignees

苏州华兴源创科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20240807

Claims (9)

1. A method for correcting a display panel, comprising the steps of: acquiring brightness data of each area of the display panel; According to the brightness data of the target splicing area in each area, brightness correction is carried out on the to-be-spliced area spliced with the target splicing area until brightness correction of all to-be-spliced areas is completed, wherein the to-be-spliced area is spliced with the target splicing area along the splicing direction, and the brightness correction comprises: calculating the ratio of each row or each column of edge brightness data of the adjacent sides of the target splicing area and the to-be-spliced area along the same row or the same column parallel to the splicing direction; When the ratio of at least part of each row or each column is not in a preset interval, correcting the brightness data of the area to be spliced into new brightness data according to the ratio of each row or each column, and correcting the new brightness data of the area to be spliced into corrected brightness data; when the ratio of all the rows or the columns is within a preset interval, correcting the brightness data of the area to be spliced into corrected brightness data; The correcting the brightness data of the to-be-spliced area into the corrected brightness data includes: And setting the product of the total ratio and the brightness data of the to-be-spliced area as the correction brightness data, wherein the total ratio is the ratio of the total target average value of all pixel brightness data in the edge range of the target spliced area to the total to-be-spliced average value of all pixel brightness data in the edge range of the to-be-spliced area.
2. The method of calibrating a display panel according to claim 1, further comprising the step of: displaying each region of the display panel with a plurality of target gray levels respectively; respectively correcting the display panel under each target gray level; In each correction process, the acquiring the brightness data of each area of the display panel includes: Each region acquires the brightness data under one of the target gray scales; The correcting the brightness of all the areas to be spliced comprises the following steps: and correcting the brightness of all the areas to be spliced under one target gray level.
3. The method according to claim 1, wherein calculating the ratio of each row or each column of the edge luminance data of the target stitching region and the region to be stitched on the respective sides close to each other along the same row or the same column parallel to the stitching direction comprises: calculating a target average value of edge brightness data of each row or each column, which is close to the edge side of the region to be spliced, of the target splicing region and is parallel to the splicing direction; Calculating the average value to be spliced of the edge brightness data of each row or each column, which is close to the edge side of the target splicing area, of the to-be-spliced area and is parallel to the splicing direction; and calculating the ratio of the target average value to each row or each column of the average value to be spliced along the same row or the same column parallel to the splicing direction.
4. A correction method of a display panel according to claim 3, wherein the correcting the luminance data of the region to be spliced into new luminance data according to the ratio of each row or each column comprises: And setting the product of the ratio of each row or each column and the brightness data of the same row or the same column on the region to be spliced as new brightness data of the row or the column.
5. The method of calibrating a display panel according to claim 1, further comprising the step of: After one of the areas to be spliced is corrected, the corrected area to be spliced and the target splicing area spliced by the corrected area to be spliced are spliced into a new integral target splicing area or an area to be spliced.
6. The method of correcting a display panel according to claim 1, wherein the acquiring luminance data of each region of the display panel includes: acquiring brightness data of each area of the display panel, and performing smoothing filtering processing on the brightness data; After the brightness correction of all the areas to be spliced is completed, the method further comprises the following steps: smoothing the preset range of the intersection of three or more areas.
7. The method of correcting the display panel according to claim 1, further comprising the step of, after the completion of the brightness correction for all the areas to be spliced: splicing all the areas into an integral display panel; carrying out Demura processing on the integral display panel; detecting the display panel, and when a splice line exists, carrying out brightness correction on each area of the display panel again.
8. A correction device for a display panel, comprising: an acquisition module for acquiring brightness data of each region of the display panel; The correction module is configured to perform brightness correction on a to-be-spliced area spliced with the target splicing area according to brightness data of the target splicing area in each area until brightness correction on all to-be-spliced areas is completed, where the to-be-spliced area is spliced with the target splicing area along a splicing direction, and the brightness correction includes: calculating the ratio of each row or each column of edge brightness data of the adjacent sides of the target splicing area and the to-be-spliced area along the same row or the same column parallel to the splicing direction; When the ratio of at least part of each row or each column is not in a preset interval, correcting the brightness data of the area to be spliced into new brightness data according to the ratio of each row or each column, and correcting the new brightness data of the area to be spliced into corrected brightness data; when the ratio of all the rows or the columns is within a preset interval, correcting the brightness data of the area to be spliced into corrected brightness data; The correcting the brightness data of the to-be-spliced area into the corrected brightness data includes: And setting the product of the total ratio and the brightness data of the to-be-spliced area as the correction brightness data, wherein the total ratio is the ratio of the total target average value of all pixel brightness data in the edge range of the target spliced area to the total to-be-spliced average value of all pixel brightness data in the edge range of the to-be-spliced area.
9. A readable storage medium storing a computer program, characterized in that the computer program, when executed by a processing module, implements the steps of the method for correcting a display panel according to any one of claims 1 to 7.

Description

Display panel correction method and device Technical Field The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for correcting a display panel. Background Compared to a small-area display panel, a large-sized display panel suffers from more problems in the process from production to use, such as: taking an OLED display panel as an example, defect compensation (Demura) is needed before delivery to ensure the quality and uniformity of the whole screen, but due to insufficient field of view of a camera, a partition compensation scheme is generally adopted, specifically, the screen is divided into a plurality of areas, each area is respectively and independently lighted, then an industrial camera is used for brightness shooting, and finally De-mura compensation is realized through an algorithm. However, the existing partition compensation scheme may generate significant stitching lines after performing De-mura, and especially as gray scale increases, the stitching lines become more and more significant, affecting the viewing effect. Taking a large display panel formed by splicing a plurality of small unit screens as an example, each unit screen is independently controlled by a respective circuit and a display element, the brightness consistency among the small unit screens is difficult to ensure, and then a splicing line is formed, so that the watching effect is influenced. Therefore, the current large-size display panel is easy to generate uneven brightness among various areas, especially the brightness difference at the splicing position leads to obvious visual demarcation, and the overall effect of the display panel is affected. Disclosure of Invention In order to solve the above-mentioned problem of uneven brightness among the regions of the display panel, an object of the present invention is to provide a method and apparatus for correcting a display panel that can effectively eliminate the splice lines and improve the overall display uniformity of the display panel . In order to achieve the above object, an embodiment of the present invention provides a method for correcting a display panel, including the steps of: acquiring brightness data of each area of the display panel; According to the brightness data of the target splicing area in each area, brightness correction is carried out on the to-be-spliced area spliced with the target splicing area until brightness correction of all to-be-spliced areas is completed, wherein the to-be-spliced area is spliced with the target splicing area along the splicing direction, and the brightness correction comprises: And comparing the ratio of the edge brightness data of the target splicing area and the edge brightness data of the adjacent areas of the to-be-spliced area, and correcting the brightness data of the to-be-spliced area into corrected brightness data according to the ratio. As a further improvement of the present invention, the method further comprises the steps of: displaying each region of the display panel with a plurality of target gray levels respectively; respectively correcting the display panel under each target gray level; In each correction process, the acquiring the brightness data of each area of the display panel includes: Each region acquires the brightness data under one of the target gray scales; The correcting the brightness of all the areas to be spliced comprises the following steps: and correcting the brightness of all the areas to be spliced under one target gray level. As a further improvement of the present invention, the comparing the ratio of the edge luminance data of the target splicing region and the edge luminance data of the regions to be spliced, which are respectively close to each other, correcting the luminance data of the regions to be spliced to corrected luminance data according to the ratio, includes: calculating the ratio of each row or each column of edge brightness data of the adjacent sides of the target splicing area and the to-be-spliced area along the same row or the same column parallel to the splicing direction; When the ratio of at least part of each row or each column is not in a preset interval, correcting the brightness data of the area to be spliced into new brightness data according to the ratio of each row or each column, and correcting the new brightness data of the area to be spliced into corrected brightness data; and correcting the brightness data of the area to be spliced into the corrected brightness data when the ratio of each row or each column is in a preset interval. As a further improvement of the present invention, the calculating of the ratio of each row or each column of the edge luminance data of the respective mutually adjacent sides of the target splicing region and the region to be spliced along the same row or the same column parallel to the splicing direction includes: calculating a target average value of edge brightnes