Grayscale Correction Unit for Display Device Aliasing
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Solution Overview
Problem
Display devices face issues with aliasing due to the larger size of dots compared to pixels, leading to suboptimal image representation, especially in pixel arrangements like RGB-stripe and S-stripe structures.
Innovation Solution
A display device with a grayscale correction unit that applies weights to grayscale values of target dots and neighboring dots to generate corrected grayscale values, improving image representation by reducing aliasing effects across various pixel arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dots are used to represent multiple colors through combination of single-color hues, then color representation capability is improved, but aliasing becomes visible due to larger dot size compared to pixels
Solution Approach 1:
The patent applies grayscale correction by adjusting the luminance parameters of pixels within dots based on their positional relationships. The correction unit modifies grayscale values dynamically according to the dot arrangement pattern (RGB-stripe, S-stripe, or PenTile), changing the brightness parameters to reduce aliasing effects while preserving color representation capabilities.
2Device complexity
If grayscale values are corrected using fixed weights for all dots, then processing simplicity is improved, but correction accuracy deteriorates due to variations in dot arrangements and grayscale values
Solution Approach 1:
The patent implements dynamic weight adjustment where the weighting coefficients applied to neighboring pixels are not fixed but are determined based on the specific grayscale values of the target pixel and its neighbors. The correction unit calculates appropriate weights dynamically according to the local image characteristics and dot arrangement, enabling adaptive correction that maintains both processing efficiency and correction accuracy.
Solution Approach 2:
The patent applies different correction strategies to different regions within a dot based on local characteristics. The grayscale correction is performed locally for each pixel within a dot, considering the specific positional relationship and grayscale values of neighboring pixels, rather than applying a uniform correction across the entire image. This local approach allows for more precise aliasing reduction.
Data Source
AI summary
A display device includes dots and a grayscale correction unit. Each dot among the dots includes a first pixel of a first color, a second pixel of a second color, and a third pixel of a third color. The grayscale correction unit is configured to generate corrected grayscale values for a target dot via application of weights to grayscale values of the target dot and grayscale values of neighboring dots of the target dot among the dots. The grayscale correction unit is configured to determine the weights based on the grayscale values of the target dot.