Display Apparatus White Pixel Gamma Segmentation
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Solution Overview
Problem
Conventional liquid crystal displays face challenges in achieving optimal side visibility and preventing yellowish phenomena when using white pixels, particularly in the 4-pixel structure, due to the limitations in gamma curve management and pixel arrangement.
Innovation Solution
The display apparatus employs a configuration with primary color pixels and white pixels, where each pixel group operates based on different gamma curves, with specific voltage applications and arrangements to alternate high and low gray-scale areas, ensuring that pixels with the same color are spatially separated and that white pixels are operated on distinct gamma curves to prevent yellowish tinting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If white pixels are used in the 4-pixel structure, then brightness is improved, but yellowish phenomena occur and side visibility deteriorates
Solution Approach 1:
The pixel array is segmented into multiple pixel groups, where each group contains white pixels and primary color pixels. By dividing the display into alternating pixel groups with different gamma characteristics, the patent prevents yellowish phenomena while maintaining brightness improvement from white pixels.
Solution Approach 2:
Different regions of the display are assigned different gamma curve characteristics. Specifically, odd-numbered pixel groups use one gamma curve while even-numbered pixel groups use another, creating local quality variations that eliminate yellowish tinting across the entire display while preserving brightness benefits.
2Illumination intensity
If white pixels are used in the 4-pixel structure, then overall visibility is improved, but side visibility deteriorates
Solution Approach 1:
The display is divided into alternating pixel groups with different gamma characteristics. This segmentation ensures that no single gamma curve dominates the entire display, thereby maintaining good side visibility while preserving the brightness and visibility benefits of white pixels.
Solution Approach 2:
The patent changes the gamma curve parameter across different pixel groups. By alternating between different gamma curves in adjacent pixel groups, the display achieves optimal side visibility while maintaining high overall visibility through the use of white pixels.
3Object-affected harmful factors
If different gamma curves are applied to different pixel groups, then yellowish phenomena are prevented, but device complexity increases
Solution Approach 1:
The display is organized into alternating pixel groups with different gamma characteristics. This segmentation provides a systematic and manageable approach to implementing multiple gamma curves, preventing yellowish phenomena while keeping the complexity manageable through regular alternating patterns.
Solution Approach 2:
The patent implements periodic alternation between different gamma curves in adjacent pixel groups. This periodic pattern simplifies the management of multiple gamma curves by establishing a predictable, repeating structure that is easier to control and implement compared to arbitrary gamma assignments.
Data Source
AI summary
A display apparatus includes a plurality of primary color pixels and a plurality of white pixels. The white pixels include a first white pixel to receive a first white pixel signal generated based on a first gamma curve and a second white pixel to receive a second white pixel signal generated based on a second gamma curve.