Barrier Structure Prevents Detergent Corrosion in Display Substrates
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Solution Overview
Problem
During the cleaning of display panels, detergents can penetrate into the chip bonding area and cause corrosion of the circuit, damaging the display device.
Innovation Solution
A device substrate with a first barrier structure located between the gate drive circuit test line and the data line pad, which includes a blocking wall to prevent detergent penetration and corrosion, and additional barrier structures on the flexible circuit board and casing to further prevent contact with the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If detergent is used to clean the display panel, then the display quality is maintained, but the circuit at the chip joint is corroded and damaged
Solution Approach 1:
The invention divides the peripheral region into separate functional zones by introducing a barrier structure that segments the cleaning solution flow path, preventing detergent from reaching the chip bonding area while allowing cleaning of the display panel surface
Solution Approach 2:
The barrier structure acts as an intermediary element between the cleaning solution and the chip bonding area, intercepting the detergent flow and redirecting it away from sensitive circuits, thus protecting the joint area during cleaning operations
2Reliability
If the barrier structure is added to prevent detergent penetration, then the circuit is protected from corrosion, but the device complexity increases
Solution Approach 1:
The barrier structure is implemented as a thin film or shell that can be integrated into the existing peripheral region structure, providing effective protection against detergent penetration while maintaining a compact and relatively simple overall device architecture
Solution Approach 2:
The barrier structure introduces a new spatial dimension (vertical layering or three-dimensional positioning) to the peripheral region design, creating a protected zone above or within the existing structure without significantly increasing the footprint or overall complexity of the display panel
Data Source
AI summary
A device substrate includes a first substrate, an active device array, a data line pad, a gate drive circuit test line, and a first barrier structure. The active device array is located on the first substrate. The data line pad is electrically connected to the active device array. The gate drive circuit test line is located on the first substrate. The first barrier structure is located on the first substrate. The first barrier structure is located between the gate drive circuit test line and the data line pad. The barrier structure includes a first blocking wall.