Display Panel Brightness Compensation via Regional Viewing Angle Correction
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Solution Overview
Problem
Current brightness compensation methods for liquid crystal display panels face distortion issues due to insufficient camera working distances, leading to compromised brightness compensation effects, especially as display panel sizes increase, and the use of multiple cameras increases production costs.
Innovation Solution
A method and device that divide the display panel into regions, using a photographing component to capture images under a preset grayscale, calculate regional viewing angles, and correct brightness data to perform accurate brightness compensation, even at non-standard camera positions, by establishing databases for display features and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single camera is used to photograph the display panel, then production cost is reduced, but image distortion occurs due to insufficient working distance
Solution Approach 1:
The patent changes the parameter of camera working distance from the standard requirement (more than three times the panel thickness) to a shorter distance suitable for large panels, and compensates for the resulting image distortion through algorithmic correction methods, thus reducing camera quantity while maintaining measurement accuracy
Solution Approach 2:
The patent replaces the mechanical solution of using multiple cameras with an algorithmic solution, using image processing and distortion correction algorithms to compensate for the insufficient working distance, thereby achieving accurate brightness measurement with a single camera
2Manufacturing precision
If the camera working distance is increased to more than three times the panel thickness, then image distortion is avoided, but this is not feasible for large display panels due to factory site limitations
Solution Approach 1:
The patent fundamentally changes the working distance parameter from the traditional requirement (>3× panel thickness) to a shorter distance that fits within factory site constraints for large panels, and compensates for the distortion through algorithmic methods
Solution Approach 2:
The patent addresses the spatial constraint by introducing a computational dimension, using image processing algorithms to correct distortion rather than relying solely on physical distance, thus solving the conflict between working distance and factory site limitations
3Measurement precision
If multiple cameras are used to avoid image distortion, then brightness compensation accuracy is improved, but production cost increases
Solution Approach 1:
The patent replaces the mechanical approach of using multiple cameras with a computational approach, using image processing and distortion correction algorithms to achieve accurate brightness measurement with a single camera, thus reducing equipment cost while maintaining measurement precision
Solution Approach 2:
The patent creates a corrected virtual copy of the display panel image through algorithmic distortion correction, which accurately represents the actual brightness distribution without requiring multiple physical cameras to capture undistorted images
Data Source
AI summary
A brightness compensation method and device of a display panel, a readable storage medium, and a display device are provided. A display panel is divided into at least one region. The region includes a to-be-corrected region. Wherein, the brightness compensation method includes: using a photographing component to photograph the display panel displaying a preset grayscale image; obtaining an image of the to-be-corrected region under a preset grayscale; obtaining brightness data of the to-be-corrected region, wherein the regional viewing angle is an included angle between a connection line of an optical center of a lens of the photographing component connecting to a center of the at least one region, and a normal of the display panel; correcting brightness of the to-be-corrected region to obtain corrected brightness data of the to-be-corrected region; and performing brightness compensation on the display panel according to the corrected brightness data of the to-be-corrected region.