Display Device With Concavo-Convex Insulating Film Opening
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Solution Overview
Problem
Conventional display devices face manufacturing defects and reduced lifespan when bent, particularly due to stress concentration and cracking in the non-display areas, leading to potential corrosion and increased defective rates in data wiring.
Innovation Solution
The display device incorporates a substrate with an inorganic insulating film and multiple organic insulating films having specific openings with concavo-convex shapes, which disperse stress and prevent cracks, ensuring the encapsulation unit covers the display unit effectively, minimizing defects and extending lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is bent to improve visibility or reduce non-display area, then the visibility at various angles is improved or the non-display area is reduced, but stress concentration and cracking occur in the non-display areas leading to manufacturing defects and reduced lifespan
Solution Approach 1:
The opening in the organic insulating film is designed with a concavo-convex shape specifically in the non-display area, creating local structural variation. This local quality change allows the opening to absorb stress concentration at critical points while maintaining the overall bending capability of the display device, thereby preventing cracks in the inorganic insulating film without compromising the bending adaptability for visibility improvement
Solution Approach 2:
The concavo-convex structure is pre-designed into the opening of the organic insulating film before the bending operation. This beforehand cushioning structure anticipates stress concentration points and provides a buffer zone that absorbs mechanical stress, preventing crack propagation to the inorganic insulating film and underlying data wiring during subsequent bending and manufacturing processes
2Area of stationary object
If the display device is bent to reduce the non-display area, then the non-display area is reduced, but stress concentration and cracking occur in the non-display areas leading to potential corrosion and increased defective rates
Solution Approach 1:
The opening with concavo-convex shape is specifically positioned in the non-display area, creating local structural variation where stress concentration is most likely to occur. This local quality change allows the structure to absorb stress without compromising the overall reduction of non-display area, thereby protecting the data wiring in the non-display region from corrosion caused by cracks
Solution Approach 2:
The concavo-convex structure is pre-designed into the opening before the device is assembled and put into service. This beforehand cushioning structure anticipates stress concentration points in the reduced non-display area and provides a buffer zone that absorbs mechanical stress, preventing crack propagation to the inorganic insulating film and underlying data wiring
Data Source
AI summary
A display device includes: a substrate including a display area and a non-display area outside the display area; a display unit arranged in the display area of the substrate; an inorganic insulating film arranged on the substrate over the display area and the non-display area; a first organic insulating film arranged on the inorganic insulating film and having a first opening extending in a first direction so as to correspond to at least a portion of the non-display area, a planar shape of an end of the first opening having a concavo-convex shape; and an encapsulation unit arranged on the display unit to cover the display unit.