LCD Sub-pixel Drain Line Segmentation for Color Mixture Reduction
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Solution Overview
Problem
Liquid crystal display (LCD) devices experience color mixture issues, particularly when viewed diagonally, due to light leakage from adjacent sub-pixel regions, leading to deteriorated image quality, which conventional black matrices attempt to mitigate but may impact aperture ratio and display quality.
Innovation Solution
The implementation of a display panel with specific arrangements of sub-pixels and drain lines, including single and double drain lines, and non-drain line regions between sub-pixels, to reduce color mixture by adjusting the aperture ratio and increasing the separation between color filters, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the size of the black matrix is increased to reduce color mixing, then color mixture is reduced, but the aperture ratio is decreased
Solution Approach 1:
The invention divides the drain line structure into multiple segments: a first drain line, a second drain line, and a third drain line, with the second drain line positioned between the first and third drain lines. This segmentation creates multiple light-shielding regions that work together to reduce color mixing more effectively than a single large black matrix, while maintaining a higher aperture ratio.
Solution Approach 2:
The invention extends the light-shielding function from the traditional black matrix dimension to the drain line dimension. By making the drain lines themselves light-shielding structures positioned between sub-pixels, the solution utilizes an additional spatial dimension for preventing color mixing without sacrificing aperture area.
2Object-affected harmful factors
If the separation between color filters is increased to reduce color mixture, then color mixture is reduced, but the display area is decreased
Solution Approach 1:
The invention introduces light-shielding drain lines as intermediary structures positioned between adjacent sub-pixels and color filters. These drain lines act as mediators that block light leakage paths without requiring increased separation between color filters, thereby maintaining display area while reducing color mixing.
3Object-affected harmful factors
If the aperture ratio is decreased to reduce color mixture, then color mixture is reduced, but the brightness is decreased
Solution Approach 1:
The invention applies light-shielding properties locally at the drain line positions between sub-pixels, rather than uniformly across the entire display. This localized approach reduces color mixing at critical interfaces while maintaining high aperture ratio and brightness in the active display regions.
Data Source
AI summary
Embodiments of a Liquid Crystal Display (LCD) device are disclosed. The LCD includes a backlight to illuminate a display panel with a plurality of sub-pixels, which include a first sub-pixel having a first color filter, a second sub-pixel having a second color filter having a different color from the first color filter, and a third sub-pixel having a third color filter having a different color from the first color filter and the second color filter.The LCD display panel includes a plurality of drain lines formed between the plurality of sub-pixels, the plurality of drain lines arranged as a first type of drain line set and a second type of drain line set, where the first type of drain line set includes only a single drain line positioned between two adjacent sub-pixels, and the second type of drain line set includes only two drain lines positioned between two adjacent sub-pixels.