Display Panel Support Pillar Positioning for Flatness
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Solution Overview
Problem
Existing display panels with support pillars experience poor flatness and supporting effectiveness due to the concave region around the gate line, leading to instability and compromised display quality.
Innovation Solution
The display panel design includes a common electrode line with a first wire portion extending between sub-pixels, allowing for a longer support region for the support pillars, which improves stability and flatness by positioning the support pillars at the intersection of the data line and the first wire portion, avoiding changes in the driving regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the support pillar diameter is increased to obtain a large sub-pixel region, then the sub-pixel area is improved, but the supporting effect deteriorates because the support pillar slides into the concave region around the gate line
Solution Approach 1:
The patent extracts the support function from the gate line region by introducing a dedicated support line structure. The support line is separately formed in the concave region, allowing the support pillar to be positioned on the support line rather than directly on the gate line, thus separating the electrical function (gate line) from the mechanical support function (support line).
Solution Approach 2:
The support line acts as an intermediary structure between the gate line and the support pillar. It is formed in the concave region and provides a stable platform for the support pillar, mediating the interaction between the pillar and the underlying gate line structure, preventing direct contact that would cause sliding.
2Reliability
If the support pillar diameter is increased to improve supporting effect, then the supporting effect is improved, but the sub-pixel area decreases
Solution Approach 1:
The patent applies local quality by providing enhanced support structure (support line) only in the specific concave region where support is needed, rather than uniformly increasing support across the entire sub-pixel area. This allows the support pillar to have adequate diameter for stability without unnecessarily reducing the overall sub-pixel area.
3Device complexity
If the gate line region is used for support pillar placement to simplify structure, then the device complexity is reduced, but the flatness deteriorates due to the concave region
Solution Approach 1:
The support function is extracted from the gate line structure by forming a separate support line in the concave region. This allows the gate line to maintain its electrical function while the support line provides the mechanical support, preserving the simplicity of the overall structure while improving flatness.
4Device complexity
If the support pillar is positioned in the concave region to simplify layout, then the layout complexity is reduced, but the supporting effect deteriorates due to pillar inclination and sliding
Solution Approach 1:
The support line serves as an intermediary structure positioned in the concave region, providing a stable platform for the support pillar. This intermediary structure prevents the pillar from inclining or sliding while maintaining the simplified layout of positioning the pillar in the concave region.
Data Source
AI summary
A display panel, a display device, and a method for manufacturing a display panel are provided. The display panel includes an array substrate, a color film substrate, and support pillars located between the array substrate and the color filter substrate. The array substrate includes sub-pixels, multiple gate lines, multiple data lines and a common electrode line. The common electrode line includes a first wire portion extending in a first direction and located between two adjacent sub-pixels. The data lines include multiple support sections each located at an intersection of the data line with the first wire portion. An orthographic projection of each of the support sections on the base substrate is a support region. A side of the support pillar close to the array substrate is located in the support region.