Display Edge Cover Adhesive Recess Design
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Solution Overview
Problem
The protective performance of conventional edge cover adhesives in display devices is deteriorated due to edge cover tapes being warped, especially as the edge frame of display devices becomes narrower, reducing the area for adhesive attachment and increasing the risk of warping during reliability tests and applications.
Innovation Solution
A display device design where an edge cover adhesive is attached to a first recess on the edge of a color filter substrate, and a first polarizing layer covers at least part of the edge cover adhesive, compressing it and reducing the risk of warping. This design enhances the adhesive's protective performance by increasing contact area and adhesion between the adhesive and the polarizing layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the edge frame of display devices becomes narrower, then the appearance is more compact and modern, but the area where edge cover adhesive can be attached becomes smaller, increasing the risk of warping and deteriorating protective performance
Solution Approach 1:
The patent introduces a recess structure that adds vertical dimension (depth) to compensate for the reduced horizontal attachment area. The recess creates a three-dimensional space where the edge cover adhesive can be embedded, transforming a two-dimensional surface attachment problem into a three-dimensional structural solution. This allows the adhesive to maintain adequate attachment area even when the edge frame width is reduced.
Solution Approach 2:
The edge cover adhesive is nested within the recess structure of the edge frame. The recess acts as a container that holds the adhesive in place, creating a nested configuration where the adhesive is positioned inside the recess rather than merely on the surface. This nesting approach ensures the adhesive remains securely attached even with limited edge frame width.
2Area of stationary object
If the attachment area for edge cover adhesive is reduced, then the device size is minimized, but the adhesive is more prone to warping during reliability tests and applications
Solution Approach 1:
The recess structure introduces vertical depth to create a three-dimensional attachment environment. By embedding the adhesive into the recess, the solution compensates for reduced horizontal attachment area through increased vertical engagement. The adhesive extends into the recess space, maintaining sufficient contact area and structural support to prevent warping.
Solution Approach 2:
The recess structure serves as a pre-prepared structural feature that cushions and supports the edge cover adhesive before reliability testing or application. The recess provides a prepared environment that accommodates the adhesive and prevents it from warping under subsequent stress conditions, acting as a preventive measure against future deformation.
3Ease of manufacture
If conventional edge cover adhesive is used without recess structure, then the manufacturing process is simpler, but the adhesive warps and protective performance deteriorates
Solution Approach 1:
The recess structure is formed as a preliminary feature during the edge frame manufacturing process, before the edge cover adhesive is applied. This pre-formed recess provides a ready-made structural solution that guides and supports the adhesive placement, ensuring proper positioning and preventing warping without requiring complex post-assembly operations.
Solution Approach 2:
The edge cover adhesive is nested within the recess structure of the edge frame. The recess acts as a container that holds the adhesive in place, creating a nested configuration where the adhesive is positioned inside the recess rather than merely on the surface. This nesting approach ensures the adhesive remains securely attached and maintains protective performance.
Data Source
AI summary
A display device and a manufacturing method thereof are disclosed. The display device includes a backlight module, a display panel, an edge cover adhesive attached to a periphery of the backlight module and extending to a surface of a side of the display panel away from the backlight module. The display panel includes an array substrate, a color filter substrate, and a first polarizing layer disposed on the color filter substrate. The color filter substrate includes a first recess formed on at least one side of the color filter substrate close to an edge of the color filter substrate and away from the array substrate. A first end portion of the edge cover adhesive is disposed in the first recess. The first polarizing layer covers at least part of the edge cover adhesive.


