Display Panel Dam Patterns for Module-Hole Moisture Sealing
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining the quality and integrity of display panels and input sensors due to issues such as moisture and oxygen ingress through module holes, which can affect the performance and longevity of the components.
Innovation Solution
The electronic device incorporates dam patterns around module holes, comprising multiple layers of insulating and conductive patterns, and an encapsulation structure to prevent moisture and oxygen ingress, while allowing for the integration of electronic modules within the active area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If module holes are provided in the display panel to integrate electronic modules, then device functionality is improved, but moisture and oxygen ingress occurs causing reliability degradation
Solution Approach 1:
The encapsulation structure is divided into multiple segments including first and second encapsulation inorganic layers, encapsulation organic layers, and dam patterns that collectively seal the module hole. This segmented approach allows the encapsulation structure to comprehensively block moisture and oxygen ingress paths while maintaining the module hole opening for electronic module integration.
Solution Approach 2:
The dam patterns serve as intermediary elements between the module hole opening and the encapsulation layers. These dam patterns protrude into the module hole and provide attachment surfaces for the encapsulation inorganic layers, creating a transition structure that enables both module integration and effective sealing.
2Reliability
If encapsulation layers are added to prevent moisture and oxygen ingress, then reliability is improved, but device complexity increases
Solution Approach 1:
The encapsulation structure merges multiple protective functions into a single integrated system. The first and second encapsulation inorganic layers and encapsulation organic layers work together as a unified encapsulation system that simultaneously provides moisture barrier, oxygen barrier, and structural support functions.
Solution Approach 2:
The dam patterns serve multiple functions: they protrude into the module hole to create sealing geometry, provide attachment surfaces for encapsulation inorganic layers, and help define the boundary between the display panel active area and the module hole area. This multi-functionality reduces the need for separate dedicated components.
Data Source
AI summary
An electronic device includes a display panel including a base layer including an active area, which includes a hole area, an encapsulation layer covering light-emitting elements and including a first encapsulation inorganic layer, an encapsulation organic layer, and a second encapsulation inorganic layer, and dam patterns disposed on the hole area, and an input sensor including an organic pattern layer which overlaps a first sensing insulating layer, first conductive patterns, a second sensing insulating layer, second conductive patterns, a third sensing insulating layer, and the hole area, is disposed on the first sensing insulating layer, and is covered on the second sensing insulating layer. A module hole overlapping the hole area is defined, and the second encapsulation inorganic layer, the first sensing insulating layer, the second sensing insulating layer, and the third sensing insulating layer contact each other on at least one top surface of the dam patterns.