Curable Resin Adhesive with Light-Shielding Member for Display Stress Management
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Solution Overview
Problem
Conventional display apparatuses with a uniform high curing degree of photo-curable resin suffer from display defects due to external force-induced stress, while those with a uniform low curing degree face separation issues between the cover plate and the display unit, and structures using dam sections to prevent resin flow can lead to easy separation of the cover plate from the display unit under external force.
Innovation Solution
A display apparatus with a curable resin system comprising a first curable-resin part at the outer edge, a second curable-resin part at the inner edge, and a third curable-resin part within the gap, where the second-resin part has a lower elastic modulus, curing degree, and adhesion strength than the first-resin part, is used, along with a light-shielding member to control curing, ensuring non-uniform curing profiles to manage stress and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If photo-curable resin is cured with uniform high curing degree, then adhesion strength is improved, but display defects occur due to stress from external force
Solution Approach 1:
The patent applies local quality by creating different curing degrees in different regions of the photo-curable resin. The resin near the light-shielding member has high curing degree for strong adhesion and stress resistance, while the resin in the display region has lower curing degree to reduce stress transmission and prevent display defects. This spatial variation in curing properties resolves the contradiction between adhesion strength and display quality.
Solution Approach 2:
The patent segments the curable resin into distinct functional parts: a first curable-resin part at the outer edge with high curing degree for adhesion, and a second curable-resin part at the inner edge with lower curing degree for stress reduction. This segmentation allows each part to fulfill its specific function, resolving the contradiction between strong bonding and display protection.
2Object-affected harmful factors
If photo-curable resin is cured with uniform low curing degree, then display defects are reduced, but separation occurs between cover plate and display unit
Solution Approach 1:
The patent uses local quality to create high curing degree regions at the periphery near the light-shielding member to ensure strong adhesion and prevent separation, while maintaining low curing degree in the central display region to avoid display defects. This localized differentiation resolves the contradiction between preventing separation and avoiding display defects.
3Strength
If dam section is used to prevent resin flow, then resin adhesion is improved, but cover plate becomes easily separated under external force
Solution Approach 1:
The patent segments the resin structure into a light-shielding member at the periphery that provides adhesion strength, and a softer resin region in the display area that can deform to absorb external forces. This segmentation allows the system to maintain adhesion while resisting separation under external force.
Solution Approach 2:
The patent applies local quality by creating a light-shielding member with specific optical and mechanical properties at the periphery for adhesion, while the inner resin region has different properties to provide flexibility and stress absorption. This local differentiation resolves the contradiction between adhesion strength and resistance to separation under external force.
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
This configuration reduces stress on the display region, minimizes display defects, and prevents separation of the cover plate from the display unit under external forces, while maintaining effective adhesion and preventing resin flow.
Implementation Method 1
a light-shielding member located on a peripheral part of at least one of the plate-shaped base and the cover plate
Implementation Method 2
a curable resin located in a gap between the plate-shaped base and the cover plate and adhering the plate-shaped base and the cover plate together
Data Source
AI summary
There are provided an apparatus and a method of manufacturing the apparatus. The apparatus includes: a plate-shaped base; a cover plate; and a curable resin adhering the plate-shaped base and the cover plate together. At least one of the plate-shaped base and the cover plate includes a light-shielding member covering a peripheral part of the at least one of the plate-shaped base and the cover plate. In an area which is shielded by the light-shielding member, a part of the curable resin at a side of an inner edge of the light shielding member is lower in one of an elastic modulus, a curing degree, and an adhesion strength than another part of the curable resin at a side of an outer edge of the light shielding member.