Display Device Brightness Adjustment for Non-Rectangular Boundary Smoothness
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Solution Overview
Problem
Display devices with rectangular pixels in non-rectangular display areas often exhibit step-like ruggedness at the boundary between the display and non-display areas due to partial coverage of subpixels by black matrices, preventing the accurate display of desired colors.
Innovation Solution
A display device with a brightness value adjustment unit that sets the brightness of boundary pixels between the display and non-display areas to an intermediate value between the brightness of fully display and fully non-display area pixels, preventing step-like ruggedness and ensuring accurate color representation by avoiding subpixel coverage with light-shielding films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If rectangular pixels are used in a non-rectangular display area, then the display area can be shaped flexibly, but step-like ruggedness occurs at the boundary between display and non-display areas
Solution Approach 1:
The patent changes the brightness parameter of boundary pixels to create a gradient effect. By adjusting the brightness values of pixels at the boundary between display and non-display areas, the invention smooths the visual transition and eliminates step-like ruggedness while maintaining the non-rectangular display area shape.
2Manufacturing precision
If a black matrix is used to cover non-display areas, then the outer circumference display becomes smooth, but subpixels at boundary pixels are partially covered causing color display problems
Solution Approach 1:
The patent applies different brightness adjustment strategies to different regions. Boundary pixels that are partially covered by the black matrix receive special brightness value adjustments, while fully internal pixels maintain normal brightness. This local differentiation allows smooth boundary display without compromising color accuracy in the affected regions.
3Shape
If boundary pixels are fully covered by light-shielding films, then the non-display area is well-defined, but the desired colors cannot be displayed accurately
Solution Approach 1:
Instead of fully covering boundary pixels with light-shielding films, the patent applies partial coverage and compensates by adjusting brightness values. This partial action approach maintains the definition of non-display areas while preserving color display capability through brightness compensation of the partially covered subpixels.
Data Source
AI summary
A display device has a display area in a non-rectangular shape, and in the display device, a plurality of rectangular-shaped pixels are arranged in the display area and a non-display area, each pixel being composed of a plurality of subpixels that correspond to a plurality of colors, respectively. The display device includes a brightness value adjustment unit that, during image display, adjusts a brightness value of a boundary pixel that is partially included in the display area and is partially included in the non-display area, in such a manner that the brightness value of the boundary pixel is between a brightness value of a pixel whose subpixels are all included in the non-display area and a brightness value of a pixel that is adjacent to the boundary pixel and whose subpixels are all included in the display area.