Display Panel Bonding Layer with Light-Peelable Adhesive
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Solution Overview
Problem
Existing display devices face challenges in reducing thickness and manufacturing costs while maintaining effective structural support and protection.
Innovation Solution
A display device design featuring a display panel with a bonding layer on its lower surface, a panel bottom cover in the display area, a support film in the non-display area, and a gap between the support film and the panel bottom cover, utilizing a light-peelable adhesive layer for simplified manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate adhesive layers are used to bond different elements (panel bottom cover and support film) to the display panel, then bonding reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The bonding layer is designed to perform multiple functions: it bonds the panel bottom cover to the display panel in the first area, and bonds the support film to the display panel in the second area. This single multi-functional bonding layer replaces what would traditionally require separate adhesive layers, reducing complexity while maintaining bonding reliability in both areas.
Solution Approach 2:
The patent merges the functionality of multiple separate adhesive layers into a single bonding layer. This bonding layer is disposed in both the first area (where it bonds the panel bottom cover) and the second area (where it bonds the support film), consolidating multiple bonding functions into one component.
2Strength
If traditional bonding methods are used without light-peelable adhesive, then bonding strength is sufficient, but manufacturing efficiency decreases and defect rates increase
Solution Approach 1:
The bonding layer is designed with light-peelable properties that allow for preliminary bonding during manufacturing, followed by easy peeling when needed. The light-peelable adhesive layer provides sufficient bonding strength during the manufacturing process, then allows for controlled peeling to remove the support film or adjust configurations, improving manufacturing efficiency without compromising initial bonding strength.
Solution Approach 2:
The patent employs an adhesive layer whose properties can be changed by light exposure. The light-peelable adhesive layer maintains strong bonding under normal conditions but undergoes a property change when exposed to light, reducing adhesive strength and allowing easy peeling. This parameter change enables both strong bonding and easy removal, addressing both strength and manufacturing efficiency requirements.
3Strength
If the support film is bonded across the entire display panel including the first area, then structural support is maximized, but thickness and manufacturing cost increase
Solution Approach 1:
The support film is selectively positioned only in the second area (non-display area) rather than across the entire display panel. This local positioning provides structural support where it is most needed (at the edges and non-display areas) while reducing overall thickness in the first area (display area), achieving optimal balance between support and thinness.
Solution Approach 2:
The display panel is divided into different functional areas (first area for display, second area for non-display components), and the support film is applied segmentally only to the second area. This segmentation allows the structure to have different properties in different regions, providing support where needed while maintaining thinness in the display area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the number of components, thickness, and manufacturing costs, while improving manufacturing efficiency and reducing defect rates by using a single bonding layer for multiple elements and employing a light-peelable adhesive layer for easy peeling.
Implementation Method 1
the adhesive strength of the light-peelable adhesive layer after the light irradiation is 50 gf/inch or less
Data Source
AI summary
Provided are a display device and a method of manufacturing the same. A display device comprises a display panel comprising a first area comprising a display area, a second area spaced apart from the first area, and a bendable third area between the first area and the second area. A bonding layer is in the first area, the second area, and the third area and located on a lower surface of the display panel. A panel bottom cover is in the first area and bonded to the bonding layer, and a support film is in the second area and bonded to the bonding layer. A gap separating the panel bottom cover and the support film from each other is in the third area.