Display Device Adhesive Bonding Peripheral Area Reduction
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Solution Overview
Problem
Existing transmissive liquid crystal display devices face challenges in minimizing the peripheral area while maintaining adequate adhesive strength between the support and cover panel, which affects the display's structural integrity and curvature.
Innovation Solution
The display device employs a unique adhesive bonding strategy with a first adhesive area where both adhesive tape and adhesive are present, intersecting the side wall, and a second adhesive area where only adhesive is present, with a wider adhesive width in the second area, to enhance bonding and reduce the peripheral area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the peripheral area is reduced, then the display device achieves a more compact design, but the adhesive strength between the support and cover panel deteriorates
Solution Approach 1:
The patent applies different adhesive configurations in different regions: the first adhesive area uses both adhesive tape and adhesive for maximum bonding strength, while the second adhesive area uses only adhesive with increased width. This local differentiation allows the peripheral area to be reduced overall while maintaining adequate adhesive strength at critical locations where the cover panel bends and detaches are most likely to occur.
Solution Approach 2:
The adhesive bonding structure is segmented into two distinct areas with different configurations. The first adhesive area (with both tape and adhesive) is positioned where bending occurs, and the second adhesive area (with only adhesive) is positioned where detachment is most likely. This segmentation allows optimization of adhesive strength distribution to match the stress distribution pattern.
2Area of stationary object
If the adhesive tape width is reduced, then the peripheral area is minimized, but the adhesive strength may be insufficient
Solution Approach 1:
The adhesive tape width is reduced in the first adhesive area compared to conventional designs, but this is compensated by the presence of both adhesive tape and adhesive working together. The local combination of bonding methods ensures that the reduced tape width does not compromise overall adhesive strength.
3Strength
If the adhesive width in the second adhesive area is increased, then the adhesive strength is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The increased adhesive width is applied only in the second adhesive area where detachment is most likely to occur, rather than uniformly across the entire peripheral area. This localized approach enhances adhesive strength where needed while minimizing the overall adhesive material usage and manufacturing complexity.
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 increases adhesive strength between the support and cover panel, allowing for a reduced peripheral area while maintaining structural integrity and curvature, as demonstrated by simulation results and stress distribution analysis.
Implementation Method 1
an adhesive tape and an adhesive bonding the cover panel to the support
Data Source
AI summary
A display device includes a cover panel having a display area and a peripheral area that differs from the display area, a display panel facing at least the display area of the cover panel, a support having a plurality of side walls that support the peripheral area of the cover panel, and an adhesive tape and an adhesive bonding the cover panel to the support.