Display Substrate With Variable-Height Spacing Members
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Solution Overview
Problem
Liquid crystal display (LCD) panels face issues with mechanical strength and light leakage due to column spacers with constant heights, which restrict cell-gap and cause friction leading to increased light leakage when compressed.
Innovation Solution
The use of first and second spacing members with different heights on a display substrate, where the second spacing member is formed in a recessed portion on the second storage electrode, allowing for increased liquid crystal receiving space and easy recovery of original shape, reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If column spacers with constant height are used, then the cell-gap is maintained, but mechanical strength is insufficient and light leakage increases due to compression friction
Solution Approach 1:
The patent applies local quality by creating spacing members with different heights at different locations. The first spacing member has a first height while the second spacing member has a second height different from the first. This local variation in height provides different mechanical properties in different regions, improving overall mechanical strength while controlling light leakage in specific areas.
Solution Approach 2:
The patent segments the single-type spacing member into multiple types with different heights. By dividing the spacing function into multiple segments (first spacing member and second spacing member with different heights), the system achieves better mechanical performance and reduced light leakage compared to a uniform spacing structure.
2Device complexity
If column spacers with constant height are used, then the structure is simple, but friction during compression increases causing loss of original shape and light leakage
Solution Approach 1:
By implementing local quality with spacing members of different heights, the patent creates regions with different compression characteristics. The varying heights allow different parts of the structure to deform and recover differently, improving the overall reliability of shape recovery while maintaining reasonable structural complexity.
3Ease of manufacture
If column spacers with constant height are used, then manufacturing is simple, but liquid crystal receiving space is restricted
Solution Approach 1:
The patent uses local quality by varying the height of spacing members in different regions. This allows the liquid crystal receiving space to be optimized in specific areas where larger space is needed, while maintaining simpler structures in other areas, thus balancing manufacturing simplicity with increased liquid crystal receiving capacity.
Data Source
AI summary
A display substrate includes a base substrate, a first storage electrode, a second storage electrode, a first insulating layer, a first spacing member and a second spacing member. The base substrate includes a first pixel region and a second pixel region that are defined by a plurality of gate lines and a plurality of source lines extended in a direction different from an extended direction of the gate lines. The first storage electrode is in the first pixel region. The second storage electrode is in the second pixel region. The first insulating layer covers the first storage electrode, and has a recessed portion on the second storage electrode. The first spacing member is on the first insulating layer corresponding to the first storage electrode. The second spacing member is on the recessed portion.