Display Panel Brightness Compensation for Edge Uniformity
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Solution Overview
Problem
Display panels exhibit nonuniformity due to brightness variations between the middle and edge regions of the active area, affecting display quality.
Innovation Solution
A brightness compensation method that calculates compensation coefficients and values for sub-pixels in the edge region, using a product of coefficients and values to adjust brightness while minimizing false compensation in adjacent areas, thereby enhancing uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If brightness compensation is performed on the edge region sub-pixels, then display uniformity is improved, but false compensation occurs in adjacent middle region sub-pixels causing brightness nonuniformity
Solution Approach 1:
The patent applies local quality by differentiating compensation processing between two distinct regions: the edge region (second active area) and the middle region (first active area). Compensation coefficients are specifically designed for edge region sub-pixels to address their brightness deficiency, while adjacent middle region sub-pixels are excluded from compensation or given different coefficients, preventing false compensation and maintaining regional brightness characteristics.
Solution Approach 2:
The patent segments the active area into at least two distinct regions: a first active area (middle region) and a second active area (edge region). This segmentation allows independent compensation strategies to be applied to each region, with the edge region receiving brightness compensation while the middle region is protected from false compensation, thereby resolving the contradiction between improving uniformity and maintaining precision.
2Illumination intensity
If compensation values are increased to enhance edge region brightness, then display uniformity improves, but contrast between middle and edge regions increases causing visible boundaries
Solution Approach 1:
The patent employs parameter changes by introducing compensation coefficients (ranging from 0 to 1) that modulate the compensation values applied to edge region sub-pixels. By adjusting this coefficient parameter, the system can control the degree of brightness enhancement, achieving sufficient edge region illumination while preventing excessive contrast that would create visible boundaries between regions.
Data Source
AI summary
The present application discloses a brightness compensation method, compensation apparatus, and compensation device of display panel, where the display panel includes a first active area and a second active area. The brightness compensation method includes: obtaining actual brightness values of sub-pixels in a preset region of the display panel at a preset grayscale value, and generating an average brightness value; determining a target brightness value of the display panel at the preset grayscale value based on the average brightness value; determining compensation coefficients and compensation values of at least some of sub-pixels in the second active area based on the target brightness value, and the actual brightness values of the sub-pixels in the second active area, and performing brightness compensation on the sub-pixel of the second active area based on a product of the compensation coefficient and the compensation value.