Adhesive Inclination Angle Optimization for Display Dead Space Reduction
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Solution Overview
Problem
Existing display apparatuses have a significant dead space area due to the inclined portions of optically clear adhesives, which limits the display area and increases the thickness of the device.
Innovation Solution
A display apparatus with an adhesive member having a surface inclination angle of at least 15 degrees but no more than 40 degrees, which reduces the dead space area by optimizing the adhesive's inclination and composition, including hydrophobic materials like butyl acrylate and perfluoroethyl acrylate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optically clear adhesive is applied in a liquid state and hardened to form an inclined portion, then the adhesion and moisture resistance are improved, but the dead space area increases and the display area is reduced
Solution Approach 1:
The patent changes the surface inclination angle parameter of the adhesive member from conventional small angles (forming large dead space) to a specific range of 15-40 degrees. This parameter optimization allows the adhesive to maintain its protective and adhesive functions while significantly reducing the horizontal projection area of the inclined portion, thereby minimizing dead space without compromising reliability
Solution Approach 2:
The patent uses a composite adhesive composition containing butyl acrylate (20-65 wt%) and perfluoroethyl acrylate (5-35 wt%) among other components. This composite material formulation enables the adhesive to achieve both the desired inclination angle (15-40 degrees) for reduced dead space and the necessary adhesion/moisture resistance properties
2Area of stationary object
If the adhesive member has a larger inclination angle, then the dead space area is reduced, but the manufacturing precision and control difficulty increase
Solution Approach 1:
The patent specifies a precise inclination angle range of 15-40 degrees as the optimal parameter window. This range is carefully selected to balance dead space reduction with manufacturability - angles below 15 degrees don't sufficiently reduce dead space, while angles above 40 degrees create manufacturing difficulties. The composition parameters (butyl acrylate 20-65 wt%, perfluoroethyl acrylate 5-35 wt%) are also optimized to achieve this inclination range reliably
Solution Approach 2:
The patent applies different material compositions at different locations or with different ratios to achieve the target inclination angle. The specific formulation with butyl acrylate and perfluoroethyl acrylate in controlled proportions creates localized properties that enable the adhesive to self-form the desired 15-40 degree inclination, making the manufacturing process more controllable and precise
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 optimized adhesive member reduces the dead space area, maximizing the display area and minimizing the device thickness, while maintaining excellent moisture resistance and adhesion properties.
Implementation Method 1
the first adhesive member may include a hydrophobic material
Data Source
AI summary
A display apparatus and a method of manufacturing the same are provided. The display apparatus includes a display panel, a cover window covering one surface of the display panel, and a first adhesive member between the display panel and the cover window, wherein a surface inclination angle of the first adhesive member is at least about 15 degrees and at most about 40 degrees.