OLED Display Substrate Edge Protection Against Cracking
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Solution Overview
Problem
During the manufacturing of OLED display panels, the base substrate is prone to cracking due to external shocks, which can lead to water and oxygen infiltration, reducing the panel's service life as cracks extend from the edge to the display region.
Innovation Solution
A method involving the formation of a first protection layer on the outer peripheral sides of the base substrate, which can be made of a material with a lower hardness than the substrate, to buffer external shocks and prevent cracking, and optionally a second protection layer covering the display element, both of which are removable before attaching a cover plate to minimize assembly disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a base substrate is used in OLED display panel manufacturing, then the display element can be supported and fabricated, but the base substrate is prone to cracking due to external shocks during cutting and assembly
Solution Approach 1:
A protection layer is formed on the base substrate before the display element is fully assembled and before external shocks occur during cutting and assembly. This protection layer acts as a cushion to absorb external shocks and prevent cracks from forming in the base substrate, thereby maintaining the reliability and service life of the OLED display panel.
Solution Approach 2:
The protection layer is formed using a material that is harder than the base substrate material. This composite structure combines the flexibility and electrical properties of the base substrate with the hardness and crack resistance of the protection layer, creating a more durable overall structure that resists cracking during manufacturing and assembly.
2Strength
If a protection layer with higher hardness than the base substrate is used, then crack resistance is improved, but the protection layer may affect the bonding process when attaching the cover plate
Solution Approach 1:
The protection layer is formed only at specific locations on the base substrate - specifically at the peripheral edges and corners where cracks are most likely to occur during cutting and assembly. This localized approach provides crack protection where needed while leaving the central bonding areas of the base substrate exposed and suitable for the bonding process when attaching the cover plate.
Solution Approach 2:
The protection layer is segmented into discrete regions rather than covering the entire base substrate. By positioning protection layers at specific peripheral locations, the design provides targeted crack resistance while maintaining bonding effectiveness in the central regions, thus resolving the contradiction between protection and manufacturability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively reduces the occurrence and extension of cracks in the base substrate and display element, enhancing the durability and service life of the OLED display panel by providing a protective buffer against external shocks without affecting the assembly bonding process.
Implementation Method 1
a first protection layer at at least one of outer peripheral sides of the base substrate... to buffer external shocks and prevent cracking
Data Source
AI summary
A display substrate and a method for manufacturing the same are provided. The display substrate includes a base substrate and a display element provided on the base substrate. The method includes steps of forming a first protection layer at at least one of outer peripheral sides of the base substrate, and removing the first protection layer before attaching a cover plate to the base substrate on which the display element is provided.