Display Substrate Alignment Pattern Adhesion via Insulating Layer
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Solution Overview
Problem
In display substrate manufacturing, the second alignment pattern is prone to detachment from the first electrode layer, which can shield pixel opening regions and affect display quality due to insufficient adhesion, leading to increased resistance and power consumption.
Innovation Solution
A display substrate design where the second alignment pattern is in contact with the first insulating layer in a non-overlapping region, with greater adhesion to the insulating layer than to the first alignment pattern, and sharing the same material, preventing detachment and ensuring stable pixel opening regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second alignment pattern is disposed on the first alignment pattern, then the alignment structure is formed, but the second alignment pattern detaches due to insufficient adhesion
Solution Approach 1:
The first insulating layer serves as an intermediary between the second alignment pattern and the first alignment pattern. The second alignment pattern contacts the first insulating layer which has greater adhesion to the second alignment pattern than the first alignment pattern has, preventing detachment while maintaining the alignment structure.
Solution Approach 2:
The adhesion parameter is changed by introducing the first insulating layer with different material properties. This layer has specifically tailored adhesion characteristics that are greater toward the second alignment pattern than the first alignment pattern, resolving the detachment issue through material parameter optimization.
2Reliability
If the second alignment pattern detaches, then the alignment structure fails, but display quality is affected due to shielded pixel opening regions
Solution Approach 1:
The first insulating layer is applied in advance to prevent the detachment of the second alignment pattern. By establishing this adhesion-enhancing layer before potential detachment issues occur, the patent preemptively protects against the harmful effect of pattern detachment shielding pixel opening regions.
3Reliability
If adhesion between second alignment pattern and first alignment pattern is insufficient, then detachment occurs, but resistance and power consumption increase
Solution Approach 1:
The first insulating layer acts as a mediator that provides sufficient adhesion between the second alignment pattern and the underlying structure. This prevents detachment that would otherwise increase resistance and lead to higher power consumption, thereby reducing energy loss.
Data Source
AI summary
A display substrate has a display area and a peripheral area. The display substrate includes a base, a first insulating layer disposed above the base, a first alignment pattern disposed in the peripheral area on a surface of the first insulating layer facing away from the base, and a second alignment pattern disposed in the peripheral area at a side of the first insulating layer away from the base. An orthographic projection of the second alignment pattern on the base and an orthographic projection of the first alignment pattern on the base have a non-overlapping region therebetween, and the second alignment pattern is in contact with the first insulating layer in the non-overlapping region. Adhesion between the second alignment pattern and the first insulating layer is greater than adhesion between the second alignment pattern and the first alignment pattern.