Adhesive Sheet UV Blocking via Dual Dye Composition
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Solution Overview
Problem
Organic light emitting display devices face issues with ineffective ultraviolet light blocking, which affects visibility and durability, especially in outdoor environments exposed to sunlight.
Innovation Solution
An adhesive sheet with a structure that includes a combination of first and second light absorption dyes dispersed in an adhesive binder resin, where the dyes are specifically formulated to block ultraviolet light without compromising transmittance in the visible light region, thereby enhancing the durability and visibility of display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single light absorption dye is used in the adhesive binder resin, then the manufacturing process is simple, but the ultraviolet blocking effectiveness is insufficient
Solution Approach 1:
The patent combines two different light absorption dyes (first light absorption dye and second light absorption dye) in the adhesive binder resin to achieve synergistic ultraviolet blocking effects. The first dye absorbs light in the 380-420nm range while the second dye absorbs light in the 420-480nm range, together providing comprehensive UV protection that neither dye could achieve alone.
Solution Approach 2:
The adhesive composition is formulated as a composite material containing the adhesive binder resin combined with two different light absorption dyes. This composite structure allows the adhesive to simultaneously provide bonding functionality and enhanced ultraviolet blocking performance through the complementary absorption spectra of the two dyes.
2Reliability
If the amount of light absorption dye is increased to improve UV blocking, then the ultraviolet blocking performance improves, but the adhesion strength deteriorates
Solution Approach 1:
The patent optimizes the concentration parameters of the light absorption dyes in the adhesive binder resin. By controlling the amount of first light absorption dye and second light absorption dye within specific ranges, the formulation achieves effective UV blocking while maintaining adequate adhesion strength. The parameter optimization balances the competing requirements of UV protection and adhesive performance.
3Reliability
If conventional adhesive materials are used, then the adhesiveness is maintained, but the visibility and durability under sunlight exposure deteriorate
Solution Approach 1:
The patent converts the harmful effect of sunlight (particularly ultraviolet radiation) into a beneficial protective function by incorporating light absorption dyes that specifically target UV wavelengths. The adhesive composition absorbs the harmful UV energy through the dye molecules, preventing this energy from damaging the display device, while the dyes are selected to not interfere with visible light transmission.
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 adhesive sheet effectively blocks ultraviolet light, minimizing color changes and maintaining high transmittance in the visible light region, thus improving the durability and performance of display devices under sunlight exposure.
Implementation Method 1
a first light absorption dye and a second light absorption dye are dispersed in an adhesive binder resin
Data Source
AI summary
The present invention discloses a adhesive sheet effectively blocking light in the ultraviolet light region without deteriorating the transmittance with respect to the visible light region and the adhesiveness and a adhesive composition including binder resin and light absorption dye dispersed in the binder resin, and it is possible to effectively block light under the 410 nm wavelength region and to be applied to a various kinds of display devices.