Array Substrate Barrier Groove Layout for Short-Circuit Prevention
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Solution Overview
Problem
Short-circuit defects frequently occur in the barrier grooves of display panels due to the absorption of water by the organic thin film layer, which is prone to moisture, especially when a conductive layer is formed on it.
Innovation Solution
The array substrate design includes a first pillow body with a pillow metal block and insulating layer on the driving circuit layer, where the organic thin film layer is defined with a barrier groove, and the conductive layer's signal wire overlaps or intersects with the pillow body to prevent short circuits, with specific dimensions and configurations to ensure coverage and overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier groove is defined on the organic thin film layer to prevent moisture absorption, then the reliability of the display panel is improved, but short-circuit defects occur in the barrier groove due to the conductive layer preparation
Solution Approach 1:
A first pillow body is introduced as an intermediary structure between the organic thin film layer and the conductive layer. The pillow body includes a first pillow metal block and a first pillow insulating layer covering the metal block. This intermediary structure prevents direct contact between the conductive layer and the organic thin film layer in the barrier groove region, eliminating the short-circuit defect while maintaining the moisture barrier function of the organic thin film layer.
2Adaptability or versatility
If the conductive layer is prepared on the organic thin film layer to provide electrical signals, then the functionality of the display panel is improved, but short-circuit defects occur in the barrier groove region
Solution Approach 1:
The first pillow body serves as a mediator that allows the conductive layer to be prepared on the organic thin film layer while preventing short-circuit defects. The pillow body creates a physical separation in the barrier groove region, enabling the conductive layer to maintain its electrical functionality in non-barrier regions while being isolated from the organic thin film layer in the barrier groove region where short-circuits would occur.
3Use of energy by moving object
If the organic thin film layer is used to reduce power consumption and enhance display contrast, then the display performance is improved, but the layer becomes prone to absorbing water requiring barrier grooves
Solution Approach 1:
The structure is segmented into different functional regions: the organic thin film layer maintains its moisture-absorbing-prone characteristics in the display region where it provides low dielectric constant and high smoothness, while the barrier groove region is segmented off and protected by the first pillow body. This segmentation allows the organic thin film layer to fulfill its energy-saving and display enhancement functions without being compromised by moisture absorption issues.
Data Source
AI summary
An array substrate includes a base substrate, a driving circuit layer, a thin film layer and a conductive layer sequentially stacked; the driving circuit layer is provided with a first pillow body on a peripheral region of the array substrate; the first pillow body includes a first pillow metal block located on at least one of a source drain metal layer and a gate layer and a first pillow insulating layer covering the first pillow metal block; the thin film layer is defined with a barrier groove on the peripheral region, a part of the first pillow body is covered by the thin film layer and the other part is exposed by the barrier groove; the conductive layer is provided with a signal wire passing across an edge of the barrier groove, and an edge of the signal wire at least partially overlaps the first pillow body.