Array Substrate Curved Lead Layout for Narrow-Bezel Displays
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Solution Overview
Problem
Display panels have a relatively small screen-to-body ratio due to a wide non-display region, which limits their display effectiveness.
Innovation Solution
An array substrate design featuring a flexible layer with a first substrate portion, a curved substrate portion, and a second substrate portion connected sequentially, along with a lead structure that is curved to reduce the width of the non-display region, allowing for a more efficient use of the base substrate space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the non-display region width is reduced to increase screen-to-body ratio, then the display effectiveness is improved, but the manufacturing precision and stress distribution become more difficult to control
Solution Approach 1:
The patent applies curvature to the lead structure, transforming it from a straight line to an arc-shaped configuration. This curved design allows the lead structure to better accommodate the reduced non-display region width while distributing mechanical stress more evenly across the substrate, thereby maintaining manufacturing precision even as the screen-to-body ratio increases
Solution Approach 2:
The patent introduces a flexible layer beneath the lead structure that can dynamically deform to accommodate the curved configuration. This dynamic adaptation allows the rigid lead structure to be formed with precise curvature without requiring excessive manufacturing precision during the fabrication process, as the flexible layer absorbs dimensional variations
2Area of moving object
If the non-display region width is reduced to increase screen-to-body ratio, then the display effectiveness is improved, but the stress on components increases
Solution Approach 1:
The curved lead structure distributes mechanical stress along an arc rather than concentrating it at sharp corners or straight-line transitions. This curvature allows stress to be dispersed across a larger area of the substrate and flexible layer, reducing peak stress values even in the compressed non-display region
Solution Approach 2:
The flexible layer acts as a stress-absorbing element that can deform elastically to accommodate the curved lead structure. This flexible film distributes and dissipates mechanical stress throughout its thickness and area, preventing stress concentration at critical interfaces between the lead structure and substrate
Data Source
AI summary
An array substrate includes a base substrate, a pixel circuit, a flexible layer, a lead structure, a control circuit and a planarization layer. The flexible layer includes a first substrate portion and a second substrate portion, and the lead structure includes a first lead portion and a second lead portion. The pixel circuit, the first lead portion and the first substrate portion are all arranged on a first side of the base substrate, the control circuit, the second lead portion and the second substrate portion are all arranged on a second side of the base substrate, and the second side is opposite to the first side.