Color Filter Substrate Peripheral Region Light-Transmitting Ratio Balance
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Solution Overview
Problem
Existing color filter substrates with curved boundaries suffer from jagged edges and color cast in peripheral display regions due to incomplete or uneven sub-pixel arrangements, affecting the visual quality of display devices.
Innovation Solution
A color filter substrate with a non-rectangular display region and a peripheral display region that includes a black matrix and a combination of first, second, and third sub-pixels, where the ratios of light-transmitting areas for these sub-pixels are balanced to ensure minimal difference from the average, preventing color cast and jagged edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the color filter substrate is provided with a curved boundary to enable diversified display device shapes, then the adaptability of display device shapes is improved, but the peripheral display region becomes too small to arrange complete pixels, causing jagged edges and discontinuity of displayed information
Solution Approach 1:
The patent applies local quality by differentiating the treatment of peripheral sub-pixels from central sub-pixels. Specifically, the light-transmitting area ratios of sub-pixels in the peripheral display region are adjusted to be equal to or greater than those in the central display region, while central sub-pixels maintain their conventional ratios. This localized adjustment ensures that peripheral sub-pixels, which are more susceptible to coverage variations, have enhanced light transmission to compensate for uneven coverage, thereby eliminating jagged edges while preserving the curved boundary design.
Solution Approach 2:
The patent implements parameter changes by modifying the light-transmitting area ratio parameter of sub-pixels in the peripheral display region. The light-transmitting area ratio is defined as the ratio of the light-transmitting area to the total area of the sub-pixel. By changing this parameter for peripheral sub-pixels (making it equal to or greater than that of central sub-pixels), the patent compensates for the uneven coverage effect caused by curved boundaries, ensuring uniform display quality across the entire display region including the periphery.
2Area of stationary object
If sub-pixels are arranged in the peripheral display region and are partially covered, then the display area is improved, but color cast is caused in the peripheral display region because the sub-pixels are covered in different ratios
Solution Approach 1:
The patent applies local quality by implementing different light-transmitting area ratio characteristics for peripheral sub-pixels compared to central sub-pixels. The peripheral sub-pixels are designed with light-transmitting area ratios that are equal to or greater than those of central sub-pixels. This localized differentiation compensates for the varying coverage ratios experienced by peripheral sub-pixels, ensuring that all sub-pixels across the display region, including the periphery, achieve uniform chromaticity and eliminate color cast while maximizing the display area.
3Manufacturing precision
If the light-transmitting area ratios of sub-pixels in the peripheral display region are increased to compensate for coverage variations, then the chromaticity uniformity is improved, but the light-transmitting area ratio difference between central and peripheral sub-pixels increases
Solution Approach 1:
The patent implements parameter changes by strategically adjusting the light-transmitting area ratio parameter for peripheral sub-pixels. The light-transmitting area ratio is increased for peripheral sub-pixels to compensate for their greater susceptibility to coverage variations, while central sub-pixels maintain their conventional ratios. This controlled parameter change achieves uniform chromaticity across the display region while the overall distribution remains stable and manageable through the established relationship that peripheral ratios are equal to or greater than central ratios.
Data Source
AI summary
A color filter substrate and a display device are disclosed. The color filter substrate includes a non-rectangular display region, which includes a peripheral display region including a black matrix and a plurality of first, second and third sub-pixels, and a non-display region. A sum of the ratios of the light-transmitting area respectively corresponding to the plurality of the first sub-pixels to areas of the same, a sum of the ratios of the light-transmitting area respectively corresponding to the plurality of the second sub-pixels to areas of the same, and a sum of the ratios of the light-transmitting area respectively corresponding to the plurality of the third sub-pixels to areas of the same are represented as P1, P2 and P3, the difference between the maximum and minimum values among P1, P2 and P3 is less than 0.3 times an average value of P1, P2 and P3.