Display Device Hole Area Sealing via Undercut Auxiliary Units
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Solution Overview
Problem
Current display devices face challenges in effectively sealing the hole area to prevent oxygen and moisture penetration, which can lead to reduced durability and performance.
Innovation Solution
The display device incorporates a substrate with a display area, a non-display area, a hole area surrounded by the display area, and a hole peripheral area, featuring a circuit layer with pixel drivers and data lines, and sealing auxiliary units with an undercut structure to create a barrier against oxygen and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing structure is used around the hole area, then the manufacturing process is simple, but oxygen and moisture can penetrate into the hole area, reducing device durability
Solution Approach 1:
The sealing auxiliary units are configured with an undercut structure that extends in the thickness direction of the substrate, creating a multi-dimensional barrier. This vertical dimension addition prevents oxygen and moisture penetration paths that a planar sealing structure would allow, thereby improving reliability without significantly complicating the manufacturing process
Solution Approach 2:
The sealing structure is divided into multiple sealing auxiliary units arranged around the hole area. Each sealing auxiliary unit independently contributes to the overall sealing barrier, allowing the system to achieve high reliability through distributed protection rather than a single complex sealing mechanism
2Ease of manufacture
If the hole area is left open for component mounting, then ease of manufacture is improved, but oxygen and moisture penetration reduces device performance
Solution Approach 1:
The sealing auxiliary units form a barrier structure that resembles a flexible shell around the hole area. This thin film-like sealing structure maintains the open hole area for component mounting while blocking harmful oxygen and moisture penetration, thus preserving both ease of manufacture and protection against harmful factors
Solution Approach 2:
The sealing auxiliary units act as an intermediary barrier between the open hole area (needed for manufacturing) and the external environment (source of oxygen and moisture). This intermediary structure allows the hole area to remain accessible during manufacturing while preventing harmful factor penetration during operation
Data Source
AI summary
A display device includes a substrate including a display area in which emission areas are arranged, a non-display area, a hole area, and a hole peripheral area. A light emitting element layer includes light emitting elements respectively corresponding to the emission areas. A through hole is disposed on the hole area and passes through at least the substrate. Sealing auxiliary units are disposed in the hole peripheral area and sequentially surround an edge of the hole area. A circuit layer includes pixel drivers corresponding to the emission areas. Data lines transmit data signals to the pixel drivers. Each of hole intersection data lines crossing the hole area and the hole peripheral area, among the data lines, include a hole bypass unit disposed in the hole peripheral area. The hole bypass units of the hole intersection data lines overlap the sealing auxiliary units.