Sub-pixel Arrangement for Display Artifact Reduction
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Solution Overview
Problem
Display devices often unintentionally generate bright-and-dark patterns due to color assignment methods, particularly when displaying image data with a predetermined resolution using fewer pixels than intended, leading to unwanted visual artifacts like lines at boundaries between colors.
Innovation Solution
A display device with a matrix arrangement of sub-pixels including red, green, blue, and white sub-pixels, where the signal processor assigns color components to sets of sub-pixels to minimize luminance differences, and applies exception handling to adjust signal levels for sub-pixels to prevent the visibility of unintended patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If image data with predetermined resolution is displayed using fewer pixels, then productivity is improved, but unintended bright-and-dark patterns are generated
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of sub-pixels based on their color type. Specifically, white sub-pixels are positioned differently relative to color sub-pixels (red, green, blue) depending on the color component being displayed. This localized differentiation in sub-pixel arrangement prevents the generation of unintended bright-and-dark patterns while maintaining display efficiency.
Solution Approach 2:
The patent changes the arrangement parameter of sub-pixels dynamically based on the color component being displayed. By adjusting which sub-pixel is positioned between the color sub-pixel and white sub-pixel according to the specific color component (red, green, or blue), the system prevents unintended patterns while maintaining reduced pixel count for display.
2Manufacturing precision
If color components are assigned to sub-pixels to minimize luminance differences, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the color display function into specific sub-pixel arrangements for different color components. By dedicating specific sub-pixel configurations to specific color components (red, green, blue), the system achieves accurate color reproduction while managing complexity through structured segmentation rather than complex processing algorithms.
Solution Approach 2:
The patent implements preliminary action by pre-establishing specific sub-pixel arrangements for different color components. Instead of complex real-time processing, the system pre-configures which sub-pixel should be positioned between the color sub-pixel and white sub-pixel for each color component, thereby achieving accurate color reproduction with reduced processing complexity.
Data Source
AI summary
A display device includes: a display unit including sub-pixels; and a signal processor configured to output output signals based on pixel data. A set of the sub-pixels includes first to fourth sub-pixels. The fourth sub-pixel is assigned a first color component as a white component in one of the two pieces of the pixel data arranged in one direction. The first to third sub-pixels are assigned second color components other than the first color component. When a signal level for lighting one or more of the first to third sub-pixels in the set of the sub-pixels is at a first level, and a signal level for one or more of the first to third sub-pixels is at a second level lower than the first level, the signal processor increases the signal levels corresponding to the second color components as a signal level corresponding to the first color component increases.