Adhesive Composition with HALS for OLED Light Resistance
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Solution Overview
Problem
Azo-based metal complex dyes used in display technologies lack full light resistance reliability, necessitating improvements to enhance their performance in organic light emitting diode (OLED) applications, where high light resistance and low haze values are crucial for optimal optical properties and panel reflectance.
Innovation Solution
An adhesive composition incorporating an acryl-based adhesive resin, an azo-based metal complex dye, and a hindered amine light stabilizer (HALS) with a specific functional group, which provides enhanced light resistance reliability and maintains low haze values, thereby reducing external light reflection in OLED devices without the need for circular polarizing plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If azo-based metal complex dyes are used in adhesive compositions, then processability and resin compatibility are improved, but light resistance reliability deteriorates
Solution Approach 1:
The patent combines azo-based metal complex dyes with hindered amine light stabilizers (HALS) in an acryl-based adhesive resin system. This composite approach allows the dye to provide color and processability while the HALS component compensates for the insufficient light resistance, creating a synergistic adhesive composition that achieves both ease of manufacture and reliable light resistance.
2Reliability
If additional components are added to improve light resistance, then light resistance reliability is improved, but device complexity increases
Solution Approach 1:
The hindered amine light stabilizer acts as an intermediary component that specifically addresses the light resistance deficiency of azo-based dyes. By introducing this dedicated protective agent, the system achieves improved light resistance without requiring complete reformulation of the adhesive composition, thus limiting the increase in complexity to a single functional additive.
3Ease of manufacture
If conventional adhesive compositions are used, then manufacturing simplicity is maintained, but external light reflection increases
Solution Approach 1:
The patent modifies the optical parameters of the adhesive composition by incorporating azo-based metal complex dyes that absorb specific wavelengths of light. This changes the transmittance and reflectance characteristics of the adhesive layer, reducing external light reflection and improving display contrast while maintaining the simple adhesive film structure and manufacturing process.
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 composition effectively suppresses external light reflection in OLED devices, maintaining transmittance between 40% to 90% and ensuring excellent luminance while securing high light resistance reliability, thus improving the display performance and reducing panel reflectance.
Implementation Method 1
a compound having a functional group represented by the following Chemical Formula 1... has high light resistance reliability
Implementation Method 2
an adhesive composition including an acryl-based adhesive resin... and a compound having a functional group represented by the following Chemical Formula 1
Data Source
AI summary
The present application relates to an adhesive composition, an adhesive film, an adhesive optical filter and a display device.