Buffer Structure for Rheological Material Containment in Display Substrates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display technology, the adhesive applied to the bending region of a display substrate has fluidity issues, leading to potential flow into adjacent circuit regions, which affects bonding and peeling processes, thereby lowering the yield of display apparatuses, especially when trying to achieve a narrow border design.
Innovation Solution
A buffer structure is formed in the bending region, comprising walls, barriers, or grooves arranged in specific shapes and configurations to block the adhesive from flowing out, thereby controlling its application and ensuring it cures within the designated area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to the bending region to adjust the neutral layer position and prevent water/oxygen penetration, then the reliability of the bending region is improved, but the adhesive may flow into adjacent circuit regions causing manufacturing defects and lowering yield
Solution Approach 1:
The bending region is divided into multiple segments by forming grooves that partition the adhesive application area. These grooves create isolated zones that prevent adhesive from flowing into adjacent circuit regions while still providing the necessary neutral layer adjustment and protection functions within each segmented area.
Solution Approach 2:
The grooves act as intermediary structures between the adhesive and the adjacent circuit regions. By introducing these intermediate features, the adhesive is contained within designated areas and its harmful flow into circuit regions is blocked, thus protecting the circuit regions without compromising the adhesive's protective function in the bending region.
2Area of stationary object
If the display border is narrowed to achieve narrow border design, then the display area is increased, but the adhesive in the bending region is more likely to flow into circuit regions
Solution Approach 1:
By segmenting the bending region with grooves, the adhesive is confined to specific zones even when the overall display border is narrowed. This segmentation creates physical barriers that prevent adhesive from migrating into circuit regions, enabling narrow border design without the harmful side effect of adhesive contamination.
Solution Approach 2:
The grooves are formed in advance before adhesive application, establishing predetermined boundaries for adhesive flow. This preliminary structuring ensures that even with reduced border width, the adhesive remains contained within safe zones and cannot flow into circuit regions during the bonding process.
3Ease of manufacture
If adhesive is applied without flow control structures, then the application process is simple, but the adhesive flows into adjacent regions affecting bonding and peeling processes
Solution Approach 1:
The grooves provide passive flow control through geometric segmentation rather than requiring complex application control mechanisms. This maintains relative simplicity in the application process while significantly improving adhesive positioning accuracy by using the grooves as physical guides and barriers.
Solution Approach 2:
The grooves enable the adhesive to self-contain within designated regions through its own viscosity and the geometric constraints of the grooves, without requiring external control mechanisms or complex application procedures. The structure itself provides the flow control function.
Data Source
AI summary
A display substrate, a manufacturing method thereof, and a display apparatus are provided. The display substrate includes a display region and a non-display region surrounding the display region, and the non-display region includes a bending region and a buffer structure. The bending region is coated with a rheological material, and the buffer structure is arranged in the bending region and configured to block the rheological material from flowing out of the bending region.