Rollable Display Panel Support Layer to Prevent Module Imprints
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Solution Overview
Problem
The issue of module imprints occurs during the defoaming operation of display modules due to the compression of adhesive layers on both sides of meshes in a patterned film layer, affecting the yield of slidable and rollable display panels.
Innovation Solution
A slidable and rollable display panel design featuring a patterned film layer with first meshes and through holes in the second adhesive layer, ensuring internal and external pressures are consistent during defoaming, thereby preventing deformation of adhesive layers and module imprints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive layers are compressed to meshes during defoaming operation, then the display module can be formed, but module imprints are caused and yield is affected
Solution Approach 1:
The patent applies local quality by creating through holes specifically in the adhesive layer at positions corresponding to the mesh structures. This localized modification allows the adhesive layer to have different properties in different regions: intact adhesive provides bonding strength, while the through holes provide pressure relief to prevent compression deformation during defoaming.
Solution Approach 2:
The through holes act as intermediaries between the mesh structure and the adhesive layer. They provide a pressure equalization path that mediates the compression force from the mesh, allowing the adhesive layer to bond effectively without experiencing excessive compression that would cause imprints.
2Adaptability or versatility
If patterned film layer with meshes is used, then flexibility is provided, but adhesive layer compression occurs during defoaming
Solution Approach 1:
The patent modifies the adhesive layer locally by creating through holes at specific positions corresponding to the mesh structures. This allows the adhesive layer to maintain its bonding function in regions without meshes while providing pressure relief in regions with meshes, preventing deformation during defoaming.
Solution Approach 2:
The through holes create a porous structure in the adhesive layer at the mesh positions. This porous modification allows pressure equalization and prevents compression of the adhesive layer by the mesh structure during defoaming, while the overall adhesive layer remains intact for bonding purposes.
Data Source
AI summary
A slidable and rollable display panel and an electronic device are provided. The display panel includes a planar area and a slidable and rollable area. The display panel at least includes a protective cover plate, an optical adhesive layer, a polarizer, a touch function layer, a display function layer, a back film and a support layer; the support layer at least includes a first adhesive layer, a patterned film layer, a second adhesive layer and a support member which are sequentially disposed from top to bottom; a first area of the patterned film layer corresponding to the slidable and rollable area is provided with a plurality of first mesh rows which are extended in a first direction and disposed parallel to each other in a second direction.