Rounded-Corner Display Substrate Layout for Uniform Etching
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Solution Overview
Problem
Existing display technologies face issues with uneven etching in the blank regions of flexible display apparatuses due to large blank areas between drive circuits, affecting signal transmission stability and display quality.
Innovation Solution
The display substrate incorporates a drive circuit layer with a design that includes a gate drive circuit partially located within a second region, featuring dummy registers or vias, and a specific arrangement of signal lines to optimize signal transmission and reduce blank areas, ensuring even etching and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If large blank areas are left between drive circuits in flexible display apparatuses, then ease of manufacture is improved, but etching uniformity deteriorates
Solution Approach 1:
The patent introduces dummy circuits (dummy gates, dummy active layers, dummy interlayer insulating films) specifically in the blank regions between drive circuits. These dummy structures create localized modifications that enable uniform etching across the entire substrate including previously problematic large blank areas, while maintaining the overall flexible display manufacturing process.
2Manufacturing precision
If dummy circuits are added to minimize blank areas, then etching uniformity is improved, but device complexity increases
Solution Approach 1:
The dummy circuits are segmented into distinct functional components: dummy gates, dummy active layers, and dummy interlayer insulating films. Each segment serves a specific purpose in achieving uniform etching while allowing the structures to be formed through separate, standardized manufacturing steps that integrate with existing processes.
Solution Approach 2:
The dummy circuits act as intermediary structures that mediate between the conflicting requirements of large blank areas (for ease of manufacture) and uniform etching (for manufacturing precision). These intermediary dummy structures enable the etching process to proceed uniformly across the entire substrate without requiring fundamental changes to the manufacturing approach.
3Reliability
If dummy circuits are added to improve signal transmission stability, then reliability is improved, but device complexity increases
Solution Approach 1:
The dummy circuits are strategically placed only in the blank regions between drive circuits, creating localized improvements in signal transmission stability without adding complexity to the functional display areas. This localized approach enhances reliability where needed while minimizing overall device complexity.
Solution Approach 2:
The dummy circuits serve as intermediary structures that improve signal transmission stability by providing uniform electrical characteristics across the substrate. They mediate between the drive circuits and the flexible substrate, ensuring stable signal transmission without requiring complex modifications to the drive circuit designs themselves.
Data Source
AI summary
Disclosed are a display substrate and a display apparatus, wherein the display substrate may include a base substrate including a display region and a non-display region, and a drive circuit layer disposed on the base substrate, the drive circuit layer includes a pixel drive circuit located in the display region and a gate drive circuit located in the non-display region; a boundary of the display region includes an arc-shaped boundary, a non-display region located on an outside of the arc-shaped boundary is referred to as a rounded corner region, and the rounded corner region includes a plurality of first regions and at least one second region; the gate drive circuit is configured to provide a drive signal to the pixel drive circuit, and is partially located within a first region, and the second region is located between adjacent first regions.