Window Member Blocking Layer for UV Curing Uniformity
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Solution Overview
Problem
Display devices face challenges in effectively blocking ultraviolet light, which can lead to non-uniform curing of adhesive resins and affect the quality and appearance of the display device during the bonding process between the window member and the display panel.
Innovation Solution
A window member with a blocking layer containing an ultraviolet absorber, such as benzotriazol or titanium dioxide, is integrated onto the connecting surface between the bottom and upper surfaces, absorbing ultraviolet light in the range of 300 nm to 400 nm and preventing it from reaching the adhesive resin, thereby maintaining uniform curing and improving the display device's quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent optical adhesive member is used to bond the window member to the display panel, then bonding strength and optical transparency are improved, but ultraviolet light can penetrate through the window member and cause non-uniform curing of the adhesive resin
Solution Approach 1:
A blocking layer is introduced as an intermediary component between the window member and the adhesive resin. This blocking layer contains ultraviolet absorbers that selectively absorb UV light in the 300-400 nm range, preventing UV penetration to the adhesive resin while maintaining optical transparency for visible light. The blocking layer thus mediates between the need for strong UV-blocking and the need for uniform adhesive curing.
Solution Approach 2:
The blocking layer is applied selectively to specific regions where UV blocking is needed, such as the connecting surface of the window member. This localized application ensures UV protection precisely where required without compromising the overall optical transparency and bonding performance of the adhesive member.
2Manufacturing precision
If ultraviolet light is blocked during the bonding process, then uniform curing of adhesive resin is improved, but the window member requires additional blocking layer structure
Solution Approach 1:
The blocking layer is integrated with the window member structure, merging the UV-blocking function with the existing window component. This integration approach avoids adding separate complex UV-blocking devices while achieving uniform adhesive curing through the blocking layer's inherent UV-absorbing properties.
Solution Approach 2:
The blocking layer utilizes composite materials containing ultraviolet absorbers (such as benzotriazol, benzophenone, salicylic acid, salicylate, cyanoacrylate, cinnamate, oxanilide, polystyrene, azomethine, or triazine-based compounds) combined with transparent matrix materials. This composite structure provides effective UV blocking in the 300-400 nm range while maintaining optical transparency for visible light, thus achieving uniform curing without excessive structural 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
The blocking layer effectively absorbs ultraviolet light, preventing pre-curing of the adhesive resin and ensuring uniform distribution, thus enhancing the bonding process and overall quality of the display device.
Implementation Method 1
The blocking layer may absorb light having a wavelength range of 300 nm to 400 nm inclusive
Data Source
AI summary
A window member includes a base substrate including a bottom surface, an upper surface opposed to the bottom surface, and a connecting surface between the bottom surface and the upper surface, and a blocking layer on the connecting surface, the blocking layer including an ultraviolet absorber.