Edge Pixel Gray Scale Adjustment for Saw-Toothed Display Boundaries
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Solution Overview
Problem
Special-shaped display substrates with non-rectangular display areas face challenges in achieving smooth edges due to saw-toothed pixel arrangements, with existing methods either causing color discrepancies or lacking a uniform rule for gray scale determination, leading to inefficient improvement of the saw-toothed edge effect.
Innovation Solution
A method for determining the display gray scale of edge pixels by calculating relative transmittance based on the area ratio of sub-areas within the display and non-display regions, using a correspondence relationship table to set appropriate gray scales, and adjusting aperture ratios or light shielding widths to achieve a smoother edge contour.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If edge pixels are arranged to match the non-rectangular display area boundary, then the display area shape is achieved, but the pixel edges form a saw-toothed pattern causing poor display quality
Solution Approach 1:
The patent applies local quality by setting different gray scales for edge pixels compared to internal pixels. Specifically, edge pixels that would normally display black (gray scale 0) are instead assigned higher gray scale values (20-80) based on their position and area ratio, creating a gradual transition zone that smooths the display area boundary while maintaining the non-rectangular shape
Solution Approach 2:
The patent changes the gray scale parameter for edge pixels to resolve the saw-toothed edge issue. By calculating the area ratio of each edge pixel's display region and applying a corresponding gray scale value from a lookup table, the patent transforms the abrupt black boundary into a gradual brightness transition, improving edge display quality while preserving the overall shape
2Manufacturing precision
If different gray scales are set for edge pixels to smooth the boundary, then the saw-toothed edge effect is improved, but the method is complex and lacks uniform rules
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the correspondence between area ratios and gray scale values in a lookup table during the design phase. This pre-computation approach eliminates the need for complex real-time calculations during display operations, providing uniform and consistent gray scale assignment for edge pixels while simplifying the implementation complexity
Solution Approach 2:
The patent segments the edge pixels into different categories based on their area ratios (e.g., 0.25-0.5, 0.5-0.75, 0.75-1.0), assigning different gray scale ranges to each segment. This segmentation approach creates a systematic and uniform method for determining gray scales, reducing complexity by breaking down the continuous problem into discrete, manageable categories
3Shape
If existing methods are used to handle edge pixels, then the display area shape is maintained, but color discrepancies occur and the saw-toothed edge effect persists
Solution Approach 1:
The patent changes the gray scale parameter for edge pixels based on their area ratio to eliminate color discrepancies and the saw-toothed effect. By systematically adjusting the brightness parameter rather than using simple black-and-white assignment, the patent achieves uniform display quality across the boundary while maintaining the non-rectangular shape
Solution Approach 2:
The patent applies local quality by treating edge pixels differently from internal pixels based on their specific geometric characteristics. Each edge pixel's gray scale is determined by its individual area ratio, creating locally optimized display quality at the boundary while preserving the global display area shape
Data Source
AI summary
The present disclosure provides a gray scale setting method, a display substrate and a display apparatus, and relates to the field of display technology. The gray scale setting method of the present disclosure applied to a display substrate. The display substrate has a display area and a non-display area. The display substrate includes an edge pixel on a boundary between the display area and the non-display area, and the edge pixel includes a first sub-area pixel within the display area and a second sub-area pixel within the non-display area. The method includes: acquiring an area ratio of the first sub-area relative to the edge pixel; determining a relative transmittance of the edge pixel according to the area ratio of the first sub-area relative to the edge pixel; and determining a display gray scale for the edge pixel according to the determined relative transmittance.