OLED Display Substrate Groove Layout for Impurity Blocking
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Solution Overview
Problem
Existing OLED display devices face issues with impurities such as water and oxygen entering the display region through insulation layers with hydrophilic properties, leading to damage of drive circuit and light emitting devices, resulting in ineffective display regions that expand over time.
Innovation Solution
A display substrate design featuring a peripheral region with an organic insulation layer containing a first groove that surrounds the display region, exposing a portion between scan driving circuits and extending in two directions to block impurity paths, while also including blocking walls to protect power lines and electrostatic discharge circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an organic insulation layer completely covers the scan driving circuits, then the circuits are protected from external impurities, but impurities can still enter through the hydrophilic insulation layer and damage internal structures
Solution Approach 1:
The organic insulation layer is segmented by forming a groove that divides it into separate regions, creating a physical barrier that blocks impurity pathways while maintaining circuit protection in covered areas
Solution Approach 2:
The groove acts as an intermediary barrier between the external environment and the scan driving circuits, preventing direct contact between impurities and the circuits while allowing the insulation layer to maintain its protective function
2Object-affected harmful factors
If a groove is formed in the organic insulation layer to block impurities, then impurity entry is prevented, but the structural integrity and coverage of the insulation layer is reduced
Solution Approach 1:
The groove extends in multiple directions (first direction and second direction) to create a two-dimensional barrier network, enhancing impurity blocking capability while maintaining sufficient structural integrity through strategic positioning
3Object-affected harmful factors
If the groove extends to expose the portion between scan driving circuits, then impurity paths are blocked, but power lines and other structures may become exposed and vulnerable
Solution Approach 1:
The groove is positioned with specific local characteristics - it exposes only the region between scan driving circuits while maintaining coverage over power lines and electrostatic discharge circuits through controlled extension limits in different directions
Data Source
AI summary
A display substrate and a manufacture method thereof, and a display device are provided. The display substrate includes a display region and a peripheral region, the peripheral region includes a first scan driving circuit and a second scan driving circuit on a first side of the display region, the peripheral region further includes a binding region on a second side of the display region, the peripheral region includes an organic insulation layer, the organic insulation layer at least partially covers the first scan driving circuit and the second scan driving circuit, and includes a first groove that is in a strip shape and extends substantially along a first direction to expose a portion between the first scan driving circuit and the second scan driving circuit, and the first groove also extends from the first side to the second side and extends substantially along a second direction on the second side.