Display Panel Hole Isolation Structure Against Moisture Intrusion
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Solution Overview
Problem
Moisture and oxygen can enter the light emitting device layer through the edge of the light emitting device layer near holes in display panels, affecting the display effect due to the need for higher screen-to-body ratios with camera or sensor mounts.
Innovation Solution
A display panel design featuring a substrate with a driving circuit layer, separators with multiple separation layers, a planarization layer, and an anode connected through a via hole, where the separators' projections on the substrate create a notch to isolate the light emitting device layers, preventing moisture and oxygen diffusion from the hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a hole is provided in the display area to mount camera or sensor, then the screen-to-body ratio is improved, but moisture and oxygen can enter the light emitting device layer through the edge near the hole, affecting display effect
Solution Approach 1:
The patent divides the protective structure into multiple segments: separators surrounding the hole, multiple separation layers (first, second, and third separation layers) within the separators, and a planarization layer. This segmented multi-layer structure creates multiple barriers that collectively block moisture and oxygen from reaching the light emitting device layer while allowing the hole to remain open for camera/sensor mounting, thus resolving the contradiction between maintaining screen-to-body ratio and preventing harmful factor intrusion.
Solution Approach 2:
The separators and separation layers act as intermediary elements between the hole (source of moisture and oxygen intrusion) and the light emitting device layer (protected component). These intermediary structures physically intercept and block the diffusion path of moisture and oxygen, allowing the hole to function for mounting purposes while preventing harmful substances from reaching the sensitive light emitting devices.
2Object-affected harmful factors
If separators with multiple separation layers are introduced to block moisture and oxygen, then the protection against harmful factors is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges multiple functions into the separator structure: the separators simultaneously serve as physical barriers surrounding the hole, holders for multiple separation layers, and structural elements that maintain device integrity. The first, second, and third separation layers are integrated within the same separator components, combining protection functions into a unified structure rather than separate elements, thus reducing overall device complexity while maintaining effective protection.
Solution Approach 2:
The separators are designed as multi-functional elements that perform multiple roles: they surround the hole to define its boundary, contain the first, second, and third separation layers for moisture and oxygen blocking, and provide structural support in the display panel. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving comprehensive protection against harmful factors.
Data Source
AI summary
Provided are a display panel, a manufacturing method therefor, and a display device. The display panel comprises a hole in a display region and comprises: a substrate; a drive circuit layer comprising a thin film transistor; a wire, connected to the thin film transistor; one or more isolation members surrounding the hole, disposed on the side of the drive circuit layer, and located between the wire and the hole, at least one isolation member comprising a first and a second isolation layer, and an orthographic projection of a surface of the first isolation layer away from the substrate is inside that of the second isolation layer on the substrate; a planarization layer, on the side of the drive circuit layer and covering the wire; and an anode, on the side of the planarization layer and connected to the wire by a via penetrating the planarization layer.