Grayscale Compensation for Display Uniformity
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Solution Overview
Problem
Existing liquid crystal display technologies face issues with brightness and darkness uniformity due to manufacturing limitations, where backlight module differences complicate grayscale compensation, leading to new brightness and darkness variations.
Innovation Solution
A method and apparatus for grayscale compensation that involves detecting and fusing display panel and backlight module grayscale compensation data to produce a unified compensation data, which is then applied to the display panel, ensuring improved brightness and darkness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If grayscale compensation is performed only on the display panel, then the display panel's brightness uniformity is improved, but new brightness and darkness differences are generated due to the backlight module's non-uniformity
Solution Approach 1:
The patent merges the grayscale compensation processes of the display panel and backlight module into a unified compensation system. By detecting and fusing compensation data from both components, the system generates comprehensive compensation values that address both the display panel's grayscale mura and the backlight module's brightness non-uniformity simultaneously, eliminating the problem where panel-only compensation creates new brightness differences.
Solution Approach 2:
The patent segments the grayscale compensation task into two independent detection processes: one for the display panel and another for the backlight module. This segmentation allows each component's specific characteristics to be analyzed separately, with the display panel compensation detecting grayscale mura and the backlight module compensation detecting brightness non-uniformity, before fusing the results into a unified compensation scheme.
2Measurement precision
If high-resolution grayscale compensation data is used, then compensation precision is improved, but data calculation time and storage requirements increase
Solution Approach 1:
The patent applies partial action by performing grayscale compensation detection on only a portion of the display panel and backlight module at a time, rather than the entire area simultaneously. This approach reduces the total data volume requiring processing and storage while still achieving effective compensation across the full display area through the unified compensation mechanism.
Data Source
AI summary
A grayscale compensation method and apparatus are provided. The grayscale compensation method includes: performing a grayscale compensation data detection on a display panel to obtain a first grayscale compensation data; preforming a grayscale compensation data detection on a backlight module to obtain a second grayscale compensation data; performing a data fusion on the first grayscale compensation data and the second grayscale compensation data to obtain a third grayscale compensation data; and performing a grayscale compensation on the display panel according to the third grayscale compensation data. By calculating the grayscale compensation data of the display panel and the backlight module at the same time, display brightness of the display panel is more uniform. Moreover, before the data fusion, the first and second grayscale compensation data may be reduced in resolution, the data amount of fusion calculation is less and the calculation time and storage space are saved.