Display Bonding Layer with Nitrogen-Reactive UV Peeling
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Solution Overview
Problem
Existing methods for peeling bonding layers from display apparatus substrates often cause physical damage and make substrate reuse difficult, especially when high temperatures are involved.
Innovation Solution
A display apparatus with a nitrogen reactive bonding layer that can be easily peeled using ultraviolet radiation, reducing adhesive strength without heat, thereby preventing substrate damage and enabling reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature methods are used to peel bonding layers, then peeling effectiveness is improved, but substrate physical damage occurs
Solution Approach 1:
The patent replaces thermal energy with ultraviolet light energy to achieve bonding layer peeling. The nitrogen reactive bonding layer undergoes photochemical decomposition when exposed to UV light, generating nitrogen gas that creates peeling force without requiring high temperatures that would damage the substrate.
Solution Approach 2:
The patent changes the energy parameter from thermal (high temperature) to optical (ultraviolet light). By incorporating nitrogen-containing compounds with specific UV absorption characteristics into the bonding layer, the material responds to UV radiation by decomposing and generating gas, enabling peeling at ambient temperatures and avoiding substrate damage.
2Strength
If conventional bonding layers are used, then strong adhesion is achieved, but substrate reuse becomes difficult
Solution Approach 1:
The bonding layer is segmented into two functional parts: a main bonding layer providing strong adhesion using conventional adhesives, and a nitrogen reactive bonding layer providing controlled peeling capability through UV-induced decomposition. This segmentation allows the bonding layer to simultaneously achieve strong bonding and easy removal.
Solution Approach 2:
The bonding layer transitions from a static, permanently adhesive material to a dynamic material whose adhesion properties can be changed on demand. The nitrogen reactive bonding layer maintains adhesion during assembly but becomes non-adhesive when exposed to UV light, enabling substrate reuse when needed.
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 ultraviolet reactive bonding layer allows for reliable substrate evaluation at high temperatures while preventing physical damage, reducing substrate discard rates and promoting eco-friendly manufacturing.
Implementation Method 1
A content of nitrogen atoms (N) of the nitrogen reactive bonding layer is greater than a content of nitrogen atoms (N) of the main bonding layer... since the nitrogen reactive bonding layer can be separated from the base substrate by the ultraviolet radiation method
Data Source
AI summary
A display apparatus according to one embodiment of the present disclosure may include a display panel, a cover layer on the display panel, and a bonding layer including a main bonding layer on the cover layer and a nitrogen reactive bonding layer on the main bonding layer, wherein a content of nitrogen atom of the nitrogen reactive bonding layer may be greater than a content of nitrogen atoms of the main bonding layer.