Display Panel Sub-Pixel Aperture Ratio Optimization
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Solution Overview
Problem
Existing display panels with four color sub-pixels face issues of excessive brightness and low brightness when displaying white or single-color images due to uniform aperture ratios and alignment accuracy affecting light transmittance, leading to reduced brightness and resolution.
Innovation Solution
The array substrate and display panel design features sub-pixels with a length-to-width aspect ratio greater than 2:1, where the fourth sub-pixel has a smaller aperture region than others, and display units are placed in the non-aperture region of the fourth sub-pixel, increasing the aperture ratio of other sub-pixels and optimizing brightness and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform aperture ratios are used for all four color sub-pixels, then manufacturing simplicity is maintained, but excessive brightness occurs when displaying white images and low brightness occurs when displaying single-color images
Solution Approach 1:
The patent applies local quality by differentiating the aperture ratios of different sub-pixel types. Specifically, the first, second, and third sub-pixels (displaying primary colors) have a first aperture ratio, while the fourth sub-pixel (displaying secondary color) has a second aperture ratio that is smaller than the first. This local differentiation allows each sub-pixel type to have optimized brightness characteristics, preventing both excessive brightness in white display and low brightness in single-color display, while maintaining manufacturing feasibility through a standardized two-ratio system.
2Illumination intensity
If the aperture region area is increased to improve brightness, then light transmittance improves, but alignment accuracy becomes more critical and may reduce effective aperture ratio
Solution Approach 1:
The patent applies parameter changes by optimizing the aperture ratio as a key parameter. By carefully selecting and differentiating the aperture ratios for different sub-pixel types, the patent achieves optimal brightness without excessively enlarging the aperture region area. This parameter optimization reduces the sensitivity to alignment errors, as the aperture dimensions are tuned to provide sufficient brightness margin while maintaining tolerance for manufacturing variations.
3Measurement precision
If four color sub-pixels are used instead of three, then resolution and light transmittance are improved, but brightness control becomes more complex due to different brightness requirements
Solution Approach 1:
The patent applies local quality by assigning different aperture ratios to different sub-pixel types based on their specific brightness requirements. The first, second, and third sub-pixels (primary colors) use a first aperture ratio, while the fourth sub-pixel (secondary color) uses a smaller second aperture ratio. This localized differentiation simplifies brightness control by providing a straightforward geometric solution, avoiding the need for complex drive circuitry or additional control mechanisms, while still achieving the benefits of four-color sub-pixel architecture for resolution and transmittance.
Data Source
AI summary
An array substrate and a display panel are provided. The array substrate includes a plurality of sub-pixels defined by a plurality of scanning lines and a plurality of data lines, and a color filter layer including a plurality of color blockers in a plurality of colors. The plurality of sub-pixels is arranged in a matrix and includes first sub-pixels, second sub-pixels, third sub-pixels, and fourth sub-pixels configured to display different colors. The first sub-pixels, the second sub-pixels, the third sub-pixels, and the fourth sub-pixels each includes an aperture region, and a non-aperture region. A length-to-width aspect, ratio of the plurality of sub-pixels is greater than 2:1. An aperture region of the fourth sub-pixel is smaller than an aperture region of any one of the first sub-pixel, the second sub-pixel, and the third sub-pixel.