Bent Region Insulating Layer Adhesion for Flexible Displays
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Solution Overview
Problem
Flexible display devices face challenges in maintaining component stability when bent, particularly in the bent region, where external stress and potential separation of insulating layers can occur, affecting the display's durability and functionality.
Innovation Solution
A display device design featuring a substrate with a display region and a bent region, where a first insulating layer is applied on the bent region, followed by a second insulating layer with openings, and a third insulating layer that contacts both, enhancing adhesion and preventing separation, even when bent with a radius of curvature of 5 mm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is made flexible and bendable, then the device can be folded or rolled for convenient carrying, but the structural integrity deteriorates and components may separate when bent
Solution Approach 1:
The insulating layer is divided into multiple sub-layers (first insulating layer, second insulating layer, third insulating layer) with different functions. The second insulating layer includes openings that allow the first and third insulating layers to contact each other, creating a segmented structure that maintains integrity during bending while preserving flexibility.
Solution Approach 2:
The patent uses a composite structure combining multiple insulating layers with different material properties. The first, second, and third insulating layers are stacked to form a composite system that provides both flexibility and structural integrity, with the openings creating a core-shell configuration that prevents component separation during bending.
2Reliability
If multiple insulating layers are stacked to protect the bent region, then adhesion and structural integrity improve, but device complexity increases
Solution Approach 1:
The stacked insulating layers serve multiple functions simultaneously: the first insulating layer provides base protection, the second insulating layer with openings creates structural anchors, and the third insulating layer provides additional protection. This multi-functional design improves adhesion and prevents component separation without requiring excessive complexity.
Solution Approach 2:
The second insulating layer acts as an intermediary between the first and third insulating layers. By including openings that allow contact between the first and third layers, it creates a mediator structure that distributes stress and enhances adhesion while maintaining a manageable layer complexity.
Data Source
AI summary
A display device includes: a substrate including a display region and a bent region provided at a side of the display region; a first insulating layer provided on the bent region of the substrate; a second insulating layer provided on the first insulating layer, the second insulating layer including at least one opening; and a third insulating layer provided on the second insulating layer and the at least one opening, and a pixel unit to display an image is provided on the display region of the substrate.