OLED Display Panel Encapsulation With Blocking Grooves Near Module Holes
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Solution Overview
Problem
Organic light emitting display panels are vulnerable to moisture and oxygen, leading to potential damage and reduced reliability.
Innovation Solution
A display panel design featuring a base substrate with a thin film transistor, encapsulation layers, and blocking grooves to prevent moisture and oxygen ingress, combined with a filling member to enhance structural integrity and protect electronic modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the organic light emitting element is exposed to the outside environment, then the manufacturing process is simplified, but moisture and oxygen penetrate into the display device, damaging the organic light emitting element
Solution Approach 1:
The patent applies encapsulation layers including an organic encapsulation layer and inorganic encapsulation layers to create a protective barrier around the organic light emitting element. This thin film structure prevents moisture and oxygen penetration while maintaining the compact design and simplified manufacturing process.
Solution Approach 2:
The patent uses a composite encapsulation structure combining organic and inorganic materials. The organic encapsulation layer provides flexibility and conformal coverage, while the inorganic encapsulation layers provide barrier properties against moisture and oxygen, creating a synergistic protective system.
2Area of stationary object
If the display device has a wide bezel area, then the electronic module can be easily accommodated, but the display area is reduced and the device size increases
Solution Approach 1:
The patent moves the electronic module from the traditional bezel area to a position below the display area by creating a module hole penetrating the base substrate. This dimensional repositioning allows the display area to extend to the edges while still providing space for the electronic module, achieving narrow bezel design.
Solution Approach 2:
The patent nests the electronic module within the display device structure by forming a module hole that penetrates the base substrate and accommodating the module within the display area boundaries. This nesting approach maximizes space utilization and enables compact integration.
3Length of moving object
If the base substrate is made thin to reduce device thickness, then the display device becomes more compact, but the base substrate becomes vulnerable to external impacts
Solution Approach 1:
The patent forms a blocking groove structure combining the base substrate, lower insulating layer, and inorganic encapsulation layer to create a composite reinforcement structure. This composite structure enhances impact resistance while maintaining thin overall device thickness.
Solution Approach 2:
The patent creates a blocking groove structure that protrudes from the rear surface of the base substrate before external impacts can reach the thin base substrate. This proactive structural feature absorbs and distributes impact forces, protecting the thin base substrate from damage.
4Reliability
If blocking grooves are formed to prevent moisture ingress, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The blocking groove structure serves multiple functions simultaneously: it acts as a moisture barrier, provides mechanical reinforcement for the thin base substrate, and creates a pathway for the inorganic encapsulation layer to extend toward the module hole. This multi-functionality reduces the need for separate structures.
Solution Approach 2:
The patent merges the blocking groove structure with the encapsulation layer system, where the inorganic encapsulation layer continuously covers both the blocking groove and extends to the module hole. This integrated approach simplifies manufacturing by combining multiple protective functions into a unified structure.
Data Source
AI summary
A display panel according to an embodiment of the present invention includes an interlayer insulating layer, a pixel layer including a lower insulating layer between the interlayer insulating layer and a base substrate, an encapsulation layer including a first inorganic layer, and a first blocking groove in the display area, adjacent to a module hole, passing through the interlayer insulating layer to expose a portion of a top surface of the lower insulating layer, and the first blocking groove is surrounded by the first inorganic layer to contact the first inorganic layer.