Display Panel Spacer Design for Cell Gap Uniformity
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Solution Overview
Problem
Low cell gap displays are sensitive to transmittance fluctuations, leading to image quality defects such as white and black surrounding, which affects product shipment and market competitiveness.
Innovation Solution
A display panel design with optimized spacers in the peripheral area, featuring a first peripheral area spacer in a first region with fewer conductive layers and an insulating island between the spacer and the black matrix, allowing the deposition material to flow into trenches, reducing the spacer's support height and aligning it with the display area's support condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cell gap is decreased to achieve fast response, then the response speed is improved, but the display becomes more sensitive to transmittance fluctuation causing image quality defects
Solution Approach 1:
The patent applies local quality by differentiating the spacer structure between the display area and peripheral area. The display area uses a first spacer structure while the peripheral area uses a second spacer structure with different characteristics, allowing each region to have optimized properties for its specific function.
Solution Approach 2:
The patent segments the cell gap control into two independent systems: one for the display area and another for the peripheral area. This is achieved by providing different spacer structures in different regions, allowing independent optimization of cell gap uniformity in the display area while managing stress in the peripheral area.
2Ease of manufacture
If uniform spacers are used across the entire panel, then the manufacturing process is simplified, but the peripheral area causes cell gap non-uniformity affecting display quality
Solution Approach 1:
The patent implements local quality by providing a first spacer in the display area and a second spacer in the peripheral area with different structural characteristics. The first spacer is designed to achieve precise cell gap control for display quality, while the second spacer is designed to compensate for peripheral stress and maintain overall uniformity.
Solution Approach 2:
The patent segments the spacer function into two distinct components: a first spacer for the display area that prioritizes precision, and a second spacer for the peripheral area that prioritizes stress compensation. This segmentation allows each spacer to be optimized for its specific region's requirements.
3Stability of the object's composition
If the peripheral area spacer height is increased to compensate for stress, then the cell gap stability is improved, but the spacer support height differs from the display area causing non-uniformity
Solution Approach 1:
The patent segments the spacer system into two functionally distinct spacers: the first spacer in the display area with optimized height for precise cell gap control, and the second spacer in the peripheral area with different height characteristics for stress compensation. This segmentation resolves the contradiction by allowing each spacer to have different heights suited to their respective functions.
Solution Approach 2:
The patent applies local quality by giving the first and second spacers different height properties appropriate for their locations. The first spacer has height optimized for display area precision, while the second spacer has height optimized for peripheral stress management, allowing each region to have the quality it needs.
Data Source
AI summary
A display panel, a method for manufacturing same, and a display device. The display panel comprises a first substrate and a second substrate, the first substrate comprises a first base substrate, a black matrix and a spacer, the second substrate comprises a second base substrate and a conductive layer, and the spacer comprises a display area spacer and a peripheral area spacer. The peripheral area comprises a first region and a second region, the number of conductive layers in the first region is less than the number of conductive layers in the second region, and the peripheral area spacer comprises a plurality of first peripheral area spacers provided in the first region. An insulating island is provided between the first peripheral area spacer and the black matrix, and a pattern of the insulating island comprises island patterns arranged at intervals to be isolated from each other.