Optical Member With Triazine Adhesive Film for UV Blocking
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Solution Overview
Problem
Existing optical members used in light emitting diode displays to block UV light often increase manufacturing costs and require additional assembly processes, while adhesive films with UV absorbents compromise cohesion and foldability.
Innovation Solution
An optical member comprising a base layer with high light transmittance and an adhesive film with low light transmittance at 350-400 nm, using a triazine UV absorbent in the adhesive film to block UV light without compromising cohesion and foldability, formed from a thermosetting or photocurable adhesive composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a UV absorbent is included in the optical film, then UV light blocking is improved, but manufacturing costs increase and additional assembly processes are required
Solution Approach 1:
The patent combines the UV blocking function with the adhesive film layer, eliminating the need for a separate optical film containing UV absorbent. The adhesive film is formulated to inherently block UV light while maintaining its bonding function, thus merging two functions (UV blocking and adhesion) into a single layer, which reduces manufacturing complexity and costs
Solution Approach 2:
The adhesive film is designed to serve multiple functions simultaneously: it provides bonding between layers, ensures foldability for flexible displays, and blocks UV light to protect the light emitting diode. This multi-functionality eliminates the need for additional specialized layers, simplifying the overall structure and reducing assembly requirements
2Object-affected harmful factors
If a UV absorbent is included in the adhesive film, then UV light blocking is improved, but cohesion and foldability deteriorate
Solution Approach 1:
The patent carefully controls the concentration of UV absorbent in the adhesive film to optimal levels that do not compromise the adhesive properties. By adjusting the UV absorbent content within specific ranges, the formulation maintains both UV blocking capability and adequate cohesion, preventing the film from becoming too rigid or losing bonding strength
Solution Approach 2:
The adhesive film uses a composite formulation combining UV absorbent compounds with flexible polymer matrices and appropriate adhesion promoters. This composite approach ensures that the UV absorbent particles are well-dispersed and do not aggregate, maintaining the flexibility and bonding characteristics while providing effective UV protection
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 solution provides effective UV protection for light emitting diodes, maintaining high peel strength and foldability while reducing manufacturing costs and simplifying assembly processes.
Implementation Method 1
an adhesive film adhesively attached to one surface or the other surface of the base layer and having a light transmittance of 4% or less at a wavelength of 350 nm to 400 nm
Data Source
AI summary
Provided are an optical member and an optical display device comprising same, the optical member comprising: a substrate layer having an 80% or higher light transmittance at a wavelength of 350-400 nm; and an adhesive film adhering to one surface or the other surface of the substrate layer and having a 4% or lower light transmittance at a wavelength of 350-400 nm.