Annular Line Spacer Structure for Display Cell Gap Stability
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Solution Overview
Problem
In display devices, positional deviations of spacers can occur due to substrate misalignment or external forces, leading to inadequate cell gap maintenance and potential luminescent point defects, especially in miniaturized and high-precision displays.
Innovation Solution
The implementation of an annular line structure with a concave portion on one substrate to receive and secure the spacer, ensuring it remains in place even with positional deviations or external forces, thus maintaining the substrate interval and preventing alignment film deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pillar-shaped spacer is disposed at the intersecting portion between gate line and source line, then the cell gap can be maintained, but the spacer may positionally deviate or slide when external force is applied or substrate misalignment occurs
Solution Approach 1:
The single pillar-shaped spacer is segmented into multiple spacers arranged in a specific pattern. This segmentation distributes the load and reduces the likelihood of all spacers deviating simultaneously, thereby improving both cell gap maintenance and positional stability.
Solution Approach 2:
The spacer configuration transitions from a symmetric single pillar to an asymmetric multi-spacer arrangement. This asymmetric distribution optimizes the mechanical support characteristics, allowing better resistance to external forces while maintaining the required cell gap.
2Measurement precision
If the display device is miniaturized for high precision, then the display quality is improved, but the spacer and intersecting portion become smaller making positional deviation more likely
Solution Approach 1:
By segmenting the spacer function into multiple smaller spacers, the invention maintains the miniaturized form factor required for high display precision while distributing the mechanical support function across multiple elements, reducing the probability of positional deviation.
Solution Approach 2:
The invention changes the parameter of spacer quantity from one to multiple, which fundamentally alters the mechanical behavior of the spacer system. This parameter change enables miniaturization to proceed while maintaining spacer reliability through statistical distribution of positional stability.
3Manufacturing precision
If the pillar-shaped spacer is made to contact the intersecting portion, then cell gap maintenance is achieved, but the alignment film surface state may deteriorate causing luminescent point defects
Solution Approach 1:
The contact interface is segmented from a single point contact to multiple distributed contact points. This segmentation reduces the pressure concentration on the alignment film at any single location, preventing surface deterioration while maintaining effective cell gap support.
Solution Approach 2:
The multiple spacers are preliminarily positioned to distribute their contact load before external forces are applied. This preliminary distribution of contact points prevents excessive localized pressure that would deteriorate the alignment film surface.
Data Source
AI summary
A display device includes a pair of substrates, lines, a spacer, and an annular line part. The substrates are disposed so as to be opposed to each other with an interval therebetween. The lines are installed on the array substrate between the paired substrates. The spacer is formed on the CF substrate so as to be interposed between the paired substrates. The annular line part is composed of one portion of the lines and has an annular shape so as to form a concave part for receiving the spacer on the center side are provided.