Flexible Light-Emitting Panel Adhesive Segmentation for Stress Release
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Solution Overview
Problem
Flexible light-emitting panels face interlayer peeling issues due to insufficient stress release when bent, leading to product failures and reduced yield.
Innovation Solution
A flexible light-emitting panel design featuring a backplate with an adhesive layer and sub-adhesive layers, a flexible layer with spaced sub-flexible layers, an array substrate, light-emitting component, and encapsulation layer, and a cover plate, where the sub-adhesive layers correspond to spacings between the sub-flexible layers to facilitate stress release and prevent peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If functional layers are disposed on a flexible substrate to maintain bendability, then the display can be bent and distorted, but interlayer peeling occurs due to insufficient stress release
Solution Approach 1:
The adhesive layer is segmented into multiple sub-adhesive layers (first sub-adhesive layer and second sub-adhesive layers) that are disposed at specific positions. The second sub-adhesive layers are disposed at spacings between sub-flexible layers, creating a segmented adhesive structure that allows stress release while maintaining bonding. This segmentation resolves the contradiction by enabling both bendability and bonding stability through strategic placement of adhesive segments rather than continuous adhesive coverage.
Solution Approach 2:
Different regions of the adhesive layer have different properties and functions. The first sub-adhesive layer provides overall bonding between the backplate and flexible layer, while the second sub-adhesive layers provide localized bonding at specific positions between sub-flexible layers. This local quality differentiation allows the adhesive structure to accommodate bending stresses in certain regions while maintaining strong bonding in other regions, resolving the contradiction between bendability and bonding stability.
2Weight of moving object
If the flexible light-emitting panel is made thin and flexible, then portability is improved, but bending stress causes interlayer peeling
Solution Approach 1:
The adhesive system is divided into multiple sub-adhesive layers with the second sub-adhesive layers positioned at spacings between sub-flexible layers. This segmentation allows the thin panel structure to maintain flexibility while the distributed adhesive segments provide cumulative bonding strength that resists bending stresses, resolving the contradiction between thinness and stress resistance.
Solution Approach 2:
The patent employs a composite structure combining flexible substrate, multiple functional layers, and a multi-component adhesive system. This composite material approach creates a layered structure where each component contributes specific properties: the flexible substrate provides bendability, the functional layers provide display functionality, and the segmented adhesive layers provide bonding strength while accommodating stress, thereby resolving the contradiction between thinness and bending stress resistance.
Data Source
AI summary
The flexible light-emitting panel, the manufacturing method thereof and the display device, the flexible light-emitting panel comprises: a backplate; the adhesive layer comprises a first sub-adhesive layer disposed on the backplate and a plurality of protrusions from the first sub-adhesive layer away from the backplate a second sub-adhesive layer; the flexible layer is disposed on the first sub-adhesive layer, and the flexible layer comprises a plurality of spaced sub-flexible layers, the second sub-adhesive layer is located at spacings; and an array is sequentially stacked on each sub-flexible layer The substrate, the light-emitting component and the encapsulation layer; the cover plate is disposed on the encapsulation layer and the second sub-adhesive layer.