Display Panel Gamma Correction Using Grayscale Sub-Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display panels use a single Gamma curve for gamma correction, resulting in fixed and inflexible brightness adjustment, which fails to accurately display image details and maintains unchanged display brightness within a frame period.
Innovation Solution
The display panel's refresh period is divided into multiple sub-frames, with each sub-frame corresponding to a distinct grayscale interval, allowing for flexible gamma correction by providing different data signals in each sub-frame based on collected optical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single Gamma curve is used for correction, then the correction method is simple and fixed, but the display accuracy of grayscale levels especially at low grayscales deteriorates
Solution Approach 1:
The patent segments the grayscale range into multiple intervals (first grayscale interval and second grayscale interval) and applies different Gamma curves to each interval. This segmentation allows the system to use simpler correction methods for high grayscales while applying more precise correction for low grayscales, thereby resolving the contradiction between correction method simplicity and grayscale display accuracy.
Solution Approach 2:
The patent implements local quality by applying different Gamma correction characteristics to different grayscale intervals. Specifically, a first Gamma curve is used for the first grayscale interval and a second Gamma curve is used for the second grayscale interval, allowing each region to have optimized correction properties tailored to its specific display requirements, thus improving overall grayscale accuracy without uniformly increasing system complexity.
2Stability of the object's composition
If brightness remains unchanged within a display period, then the display control is simple and stable, but the adaptability to different grayscale intervals deteriorates
Solution Approach 1:
The patent introduces dynamic control by adjusting the display brightness of different grayscale intervals within the same display period. The controller is configured to set the display brightness of the first grayscale interval to a first brightness and the second grayscale interval to a second brightness, enabling the system to adapt to different grayscale requirements dynamically while maintaining overall display stability through controlled temporal variations.
Solution Approach 2:
The patent employs periodic action by implementing temporal modulation of brightness within the display period. Different grayscale intervals are displayed at different brightness levels during different time periods, with the display refreshing cyclically. This periodic variation in brightness allows the system to achieve both stability (through regular refresh cycles) and adaptability (through varying brightness levels for different grayscale intervals).
Data Source
AI summary
A display panel, a method for gamma correction of a display panel and a device for gamma correction of a display panel are provided according to the present disclosure. The method for gamma correction includes: determining a target grayscale interval where the to-be-displayed grayscale is located and a target sub-frame corresponding to the target grayscale interval based on a to-be-displayed grayscale; correcting a gamma of the target grayscale interval including: in each of sub-frames other than the target sub-frame, providing a grayscale interval data signal to the sub-pixel, and in the target sub-frame, providing a data signal to the sub-pixel, and correcting based on collected optical data to obtain a calibration data signal. Further, a refresh period is divided into at least two sub-frames for gamma correction, and different sub-frames correspond to different grayscale intervals.