Display Panel Separation Layer for Narrow Bezel Moisture Protection
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Solution Overview
Problem
Existing display panel technologies face challenges in creating narrow bezel or bezel-less designs for terminal devices by effectively integrating components like cameras or sensors without compromising the display's integrity, particularly in preventing moisture and oxygen erosion around openings.
Innovation Solution
A display panel structure featuring a substrate with a transition area separating opening and display areas, including a driving layer, planarization layer, separation layer with a shrinking sidewall, a barrier layer for moisture and oxygen blocking, and a discontinuous light-emitting layer, which prevents erosion by isolating the display area from the opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If openings are formed in the display panel to integrate cameras or sensors, then the bezel width is reduced and narrow bezel or bezel-less appearance is achieved, but moisture and oxygen can easily enter the display area through the openings causing erosion to the display device
Solution Approach 1:
The display panel is divided into distinct functional areas: opening area, transition area, and display area. The transition area acts as a buffer zone that segments the opening area from the display area, preventing direct exposure of the display to moisture and oxygen entering through openings. This spatial segmentation resolves the contradiction by allowing openings for cameras/sensors while protecting the display area through area-based isolation.
Solution Approach 2:
The transition area serves as an intermediary region between the opening area and display area. This intermediate zone, containing driving layers and display layers, acts as a protective barrier that mediates between the external environment (through openings) and the sensitive display components, preventing moisture and oxygen from directly reaching the display area while maintaining the narrow bezel design.
2Device complexity
If the display area is directly adjacent to the opening area, then the structural complexity is reduced, but the display device becomes vulnerable to moisture and oxygen erosion
Solution Approach 1:
The display panel structure is segmented into three distinct areas: opening area, transition area, and display area. This segmentation introduces the transition area as a protective intermediate zone that contains necessary driving and display layers, creating a reliable barrier against moisture and oxygen while maintaining relatively simple overall structure through clear area demarcation.
Solution Approach 2:
The transition area functions as an intermediary structure between the opening area and display area. This intermediate zone, containing driving layers and display layers, provides structural complexity only where necessary for protection, while allowing direct adjacency in other regions, thus achieving reliability without excessive complexity.
3Object-affected harmful factors
If a barrier layer is added to block moisture and oxygen, then the display area is protected from erosion, but the device complexity and manufacturing process become more complex
Solution Approach 1:
The barrier function is merged with the existing driving layers and display layers in the transition area. Rather than adding a separate dedicated barrier layer, the patent utilizes the inherent barrier properties of the driving and display layer materials (such as aluminum oxide, silicon oxide, or silicon nitride) that are already part of the standard display structure, thus providing moisture and oxygen protection without increasing overall device complexity.
Solution Approach 2:
The driving layers and display layers in the transition area serve multiple functions: they provide electrical driving functionality, structural support, and simultaneously act as moisture and oxygen barriers. This multi-functionality eliminates the need for separate dedicated barrier layers, reducing device complexity while maintaining effective protection against harmful factors.
Data Source
AI summary
The present disclosure relates to a display panel that includes: a separation layer disposed on a surface of a planarization layer facing away from a substrate in a transition area, and surrounds at least a part of an opening area of the substrate in a circumferential direction of the opening area, and a sidewall of the separation layer gradually is shrunk toward the substrate in a direction perpendicular to the substrate; and a barrier layer located in the transition area and at least covers a surface of the barrier layer facing away from the substrate. The barrier layer includes a material for blocking moisture and oxygen. The display layer covers the planarization layer and the barrier layer. The display layer includes a light-emitting layer, and the light-emitting layer is discontinuous at a sidewall position of the separation layer.