Array Substrate Common Metal Layout to Prevent Spacer Catching
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Solution Overview
Problem
In liquid crystal display panels, the spacers between the color filter substrate and the array substrate can deform when pressed, leading to stress accumulation in the glass, causing uneven display in dark states due to the spacer being caught by the common metal layer, which hinders quick recovery and results in light transmission issues.
Innovation Solution
The array substrate design includes a base substrate with thin film transistors and a common metal layer arranged such that the distance between the common metal layer and the spacing areas is optimized to prevent the spacer from being caught, allowing for free sliding and quick recovery, with additional features like intersecting metal wires and planarization layers to enhance this functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the common metal layer is disposed close to the spacing areas to reduce the distance, then the manufacturing precision is improved, but the spacer gets caught by the common metal layer causing stress accumulation and uneven display
Solution Approach 1:
The patent divides the common metal layer into multiple segments (first metal wire and second metal wire) that are arranged in an intersecting manner. This segmentation creates gaps between the metal wires, preventing the spacer from being caught while maintaining the positioning function. The segmented structure allows the spacer to slide freely through the gaps without accumulating stress, thus resolving the contradiction between positioning precision and display uniformity.
2Use of energy by stationary object
If the common metal layer is arranged with a continuous structure to ensure electrical connectivity, then the electrical conductivity is improved, but the spacer cannot slide freely causing quick recovery issues
Solution Approach 1:
The continuous common metal layer is segmented into multiple metal wires arranged in an intersecting grid pattern. This segmentation creates gaps that allow the spacer to slide freely in multiple directions while maintaining electrical connectivity through the interconnected metal wire structure. The segmented design enables both free spacer movement and electrical conductivity.
Solution Approach 2:
The gaps between the metal wires act as intermediaries that facilitate spacer movement. These gaps provide pathways for the spacer to slide freely without direct contact with the metal layer, while the metal wires themselves maintain the electrical connectivity function. The intermediary spaces resolve the contradiction between conductivity and sliding freedom.
3Reliability
If the distance between common metal layer and spacing areas is increased to prevent spacer catching, then the display uniformity is improved, but the positioning precision of spacing areas deteriorates
Solution Approach 1:
By segmenting the common metal layer into intersecting metal wires, the patent achieves a balanced distance configuration. The gaps created by segmentation allow sufficient spacing for spacer movement while the intersecting metal wires maintain positioning precision. This segmented approach enables both display uniformity and positioning accuracy to be achieved simultaneously.
Data Source
AI summary
An array substrate, a display panel and a display apparatus are disclosed. The array substrate includes: a base substrate; an array of thin film transistors disposed on a side of the base substrate, wherein the array of thin film transistors includes a semiconductor layer; and a common metal layer disposed on a side of the array of thin film transistors away from the base substrate. An orthographic projection of the common metal layer on the base substrate does not overlap with an orthographic projection of the semiconductor layer on the base substrate, the common metal layer includes a plurality of metal wires arranged in an intersecting manner, wherein at least one of the plurality of metal wires is provided with a gap, and the main spacing area is disposed at or close to a center of an orthographic projection of the gap on the base substrate.