Display Substrate Blocking Portion for Organic Layer Edge Control
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Solution Overview
Problem
Flexible OLED display substrates face issues with waviness at the edges due to the slope of the organic encapsulation layer, which affects light paths and display quality.
Innovation Solution
A display substrate design featuring a blocking portion outside the display region to prevent the organic layer from entering the bending region, combined with an optical compensation portion to mitigate waviness, ensuring uniform thickness and refractive index across the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the organic encapsulation layer is formed by printing, then the manufacturing process is simple and flexible, but the organic layer forms a slope at the edge which causes waviness in the display image
Solution Approach 1:
The patent introduces a blocking portion as an intermediary structure between the organic encapsulation layer and the bending region. This blocking portion prevents the organic layer from naturally sloping into the bending region, thereby eliminating the waviness problem while maintaining the simple printing process for organic layer formation.
Solution Approach 2:
The blocking portion is formed in advance before the organic encapsulation layer is deposited. This preliminary action creates a physical barrier that guides the organic layer material to stop at the correct position, preventing slope formation at the edge and ensuring flatness without complicating the manufacturing process.
2Reliability
If the organic layer flows to the edge of the display substrate, then the encapsulation is complete, but the slope enters the display region causing defective waviness
Solution Approach 1:
The blocking portion serves as a mediator that allows the organic layer to flow and complete encapsulation up to the desired boundary, while simultaneously preventing it from entering the bending region and creating waviness in the display area.
Solution Approach 2:
The blocking portion is strategically placed only at specific locations where the organic layer needs to be contained, allowing the organic layer to flow freely in other areas to ensure complete encapsulation while preventing waviness in critical display regions.
3Manufacturing precision
If the first organic layer covers the edge of the encapsulation layer, then the edge display effect is improved, but the organic layer may enter the bending region causing defects
Solution Approach 1:
The blocking portion acts as a mediator that enables the first organic layer to extend and cover the edge of the encapsulation layer for improved display quality, while simultaneously serving as a barrier to prevent the organic layer from entering the bending region and causing defects.
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
Improves display quality by reducing waviness and maintaining uniform thickness, thereby enhancing the edge portion's display effect and preventing organic layer overflow.
Implementation Method 1
the first organic layer includes an optical compensation portion, a projection of the slope portion onto the base substrate is located within a projection of the optical compensation portion onto the base substrate, and the optical compensation portion is configured to weaken or eliminate a phenomenon, of waviness occurring in a display image, caused by the slope portion
Data Source
AI summary
A display substrate and a display apparatus are provided. The display substrate is formed with a display region. The display substrate includes a base substrate, a light-emitting layer, an encapsulation layer, a touch control layer, a blocking portion, and a first organic layer. The touch control layer is located at a side, of the encapsulation layer, away from the base substrate. The first organic layer is located at a side, of the touch control layer, away from the base substrate, at least covers at least a portion of an edge of the encapsulation layer, and is located outside the bending region. The blocking portion is located at at least one side of the display region and is located at a side, away from the display region, of the edge, away from the display region, of the encapsulation layer.