Color Filter Substrate with Region-Specific Opening Widths
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Solution Overview
Problem
Existing liquid crystal display panels face display defects in the peripheral region due to uneven cell thickness caused by different arrangements of black matrices in the display and non-display regions, leading to light leakage and thickness disparities.
Innovation Solution
A color filter substrate is designed with a base and a color filter layer, where the color resists in the display region define smaller openings than those in the non-display region, with the second openings being larger to accommodate a planarization layer and reduce overall thickness, ensuring uniform cell thickness across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If black matrices are arranged differently in display and non-display regions, then light leakage is prevented in the peripheral region, but cell thickness becomes uneven leading to display defects
Solution Approach 1:
The patent applies different opening widths to color resists in different regions: narrower openings in the display region and wider openings in the non-display region. This local differentiation allows the non-display region to have sufficient thickness (preventing light leakage) while the display region maintains appropriate thickness for display quality, thus resolving the contradiction between preventing light leakage and maintaining cell thickness uniformity.
2Manufacturing precision
If color resists in non-display region have smaller openings like display region, then manufacturing precision is improved, but the planarization layer cannot be properly formed and cell thickness becomes non-uniform
Solution Approach 1:
The patent implements local quality by differentiating opening widths based on region function. The non-display region uses wider openings that accommodate the planarization layer formation process, ensuring proper cell thickness. The display region uses narrower openings for precise display control. This regional differentiation resolves the contradiction between manufacturing precision and cell thickness uniformity.
3Object-affected harmful factors
If black matrix layer in non-display region has no openings, then light leakage is prevented, but the region requires greater thickness which causes display defects
Solution Approach 1:
The patent uses local quality by creating region-specific color resist structures. In the non-display region, wider openings in color resists provide the necessary thickness to prevent light leakage while maintaining acceptable display quality. In the display region, narrower openings optimize for display performance. This resolves the contradiction between light leakage prevention and display quality.
Data Source
AI summary
The present disclosure provides a color filter substrate and a display panel. The color filter substrate is divided into a display region and a non-display region around the display region, and includes a base and a color filter layer on the base. The color filter layer includes a plurality of columns of color resists arranged at intervals, any two adjacent columns of color resists in the display region define one of a plurality of first openings, any two adjacent color resists in the non-display region define one of a plurality of second openings, and a width of an orthographic projection of the second opening on the base is greater than a width of an orthographic projection of the first opening on the base.