Irregular Display Panel Edge Shading and Brightness Adjustment
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Solution Overview
Problem
Existing irregular shaped display panels suffer from jagged edges and color shifts due to shading layers that are not aligned with pixel arrangements, leading to compromised visual effects and user experiences.
Innovation Solution
A design method involving an initial shading layer along the edge of the display area, where pixels partially covered by the layer have their brightness ratios adjusted to match those of fully uncovered pixels, achieved through adjustments in aperture ratios, electrode shapes, or TFT ditch regions, ensuring consistent color and brightness across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a shading layer is used to achieve slant/curved edges between display and non-display areas, then the edge shape is improved, but the jagged edge becomes visible causing compromised visual effect and user experience
Solution Approach 1:
The patent applies different treatments to different regions: pixels completely covered by the shading layer are turned off, while pixels partially covered have their sub-pixel brightness ratios adjusted. This local differentiation eliminates the jagged edge effect while maintaining smooth curved edges in the display panel.
2Shape
If the shading layer follows the edge of the actual display area to reduce jagged feel, then the edge smoothness is improved, but color shift and non-uniform brightness occur due to unequal coverage of RGB sub-pixels
Solution Approach 1:
The patent adjusts the brightness ratio of sub-pixels locally in regions partially covered by the shading layer. By compensating for the unequal coverage areas of RGB sub-pixels through brightness adjustment, the invention maintains color uniformity while preserving the smooth edge shape.
Solution Approach 2:
The patent changes the brightness parameter of sub-pixels to compensate for unequal shading layer coverage. By adjusting the brightness ratio of RGB sub-pixels in partially covered regions, the invention eliminates color shift while maintaining the smooth edge contour.
3Shape
If the shading layer follows the edge of the actual display area to reduce jagged feel, then the edge smoothness is improved, but non-uniform brightness (mura) occurs along the edge
Solution Approach 1:
The patent applies local brightness adjustment to pixels partially covered by the shading layer. By modifying the brightness ratio of sub-pixels in these specific regions while leaving other areas unchanged, the invention eliminates non-uniform brightness along the edge while maintaining smooth edge contours.
Data Source
AI summary
The present invention teaches a design method and a structure for improving display quality of an irregular shaped panel. The design method includes: disposing an initial shading layer along an edge of the panel's actual display area; for a pixel not entirely covered by the initial shading layer but having at least a sub-pixel entirely covered by the initial shading layer, setting the pixel to be turned off at all times, or extending the initial shading layer to cover the pixel; and, for a pixel and each of its sub-pixels not entirely covered by the initial shading layer, setting the pixel so that a brightness ratio among its sub-pixels is, under a same driving condition, identical or close to that among the sub-pixels of a normal pixel. The design method and structure reduce or eliminate jagged feel and color shift along an edge of the area of notch or irregularity.