Low-Temperature Photosensitive Resin for OLED Anti-Reflection
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Solution Overview
Problem
OLED devices face challenges with reflection reduction using polarized films, which degrade emission efficiency and increase manufacturing costs, and existing anti-reflective solutions for OLEDs require high-temperature processes, limiting effective low-temperature curing options.
Innovation Solution
A photosensitive resin composition capable of low-temperature curing, comprising a first binder resin with an unsaturated ethylene-based group and a second binder resin, along with a photo cross-linking agent, thermal curing agent, and photoinitiator, to form a film with excellent anti-reflection properties suitable for OLED devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarized film is used to prevent or reduce reflection of external light, then the reflection is reduced, but the emission efficiency of the OLED device deteriorates and the manufacturing cost increases
Solution Approach 1:
The patent changes the optical parameters of the color filter by introducing a specific refractive index range (1.3 to 1.8) and controlling film thickness (50-200 nm) to achieve anti-reflection functionality. This transforms the color filter from a simple color selection component to an active anti-reflection element, reducing external light reflection while maintaining OLED emission efficiency without requiring additional polarized films
Solution Approach 2:
The patent makes the color filter perform multiple functions: it maintains its original color selection function while simultaneously providing anti-reflection functionality through the integrated low-refractive-index layer. This multi-functional design eliminates the need for separate polarized films, reducing manufacturing cost and improving emission efficiency
2Ease of manufacture
If an anti-reflective color filter is used instead of a polarized film, then the manufacturing cost is reduced and emission efficiency is improved, but the curing process requires high temperature (200°C or higher)
Solution Approach 1:
The patent changes the chemical composition parameters of the resin material to achieve low-temperature curing. By selecting specific resins with appropriate glass transition temperatures and curing characteristics, the formulation enables complete curing at temperatures below 100°C, making the process compatible with OLED manufacturing constraints
Solution Approach 2:
The patent creates a composite material system combining a low-refractive-index layer with specific resin components (acrylic resins, vinyl resins, or epoxy resins) and crosslinking agents. This composite formulation achieves both the optical properties needed for anti-reflection and the chemical properties needed for low-temperature curing
3Temperature
If a low-temperature curing process is used, then the manufacturing process becomes compatible with OLED devices, but the curing completeness and film quality may be compromised
Solution Approach 1:
The patent introduces crosslinking agents as intermediaries that facilitate complete curing at low temperatures. These crosslinking agents (such as glycidyl methacrylate, pentaerythritol tetraacrylate, or diamine compounds) mediate the curing reaction, enabling the resin to achieve complete crosslinking and film formation at temperatures below 100°C without compromising curing completeness
Solution Approach 2:
The patent optimizes the molecular weight and functional group content of the resin components to enable low-temperature curing. By controlling parameters such as the weight average molecular weight (10,000-100,000) and the content of reactive functional groups, the formulation achieves complete curing at low temperatures while maintaining film quality and curing completeness
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 low-temperature-cured film achieves high transmittance, improved chemical resistance, and excellent pattern straightness, enhancing OLED efficiency and reducing manufacturing costs by eliminating the need for high-temperature processes.
Implementation Method 1
a photosensitive resin composition capable of being cured at a low temperature... comprising a first binder resin with an unsaturated ethylene-based group... and a photoinitiator
Data Source
AI summary
A photosensitive resin composition includes a first binder resin represented by Formula 1. The photosensitive resin composition may be cured at a low temperature (e.g., about 0° C. to about 100° C., about 40° C. to about 100° C., or about 70° C. to about 100° C.). A film may be formed from the photosensitive resin composition. An organic light-emitting display (OLED) device may include the film prepared from the photosensitive resin composition.