Scattering Adhesive Polarizing Plate for OLED Rainbow Stain Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The intensification of rainbow stain phenomenon in OLED display devices due to increased luminance deteriorates the appearance visual appreciation, and existing solutions do not adequately address this issue while ensuring excellent hardness and durability.
Innovation Solution
A polarizing plate comprising a polarizer and a scattering pressure-sensitive adhesive layer with specific haze and elastic modulus values, incorporating scattering particles to manage light scattering and improve visibility, hardness, and resistance to heat and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If luminance of OLED display panel is increased, then brightness performance is improved, but rainbow stain phenomenon is intensified
Solution Approach 1:
The patent introduces a scattering pressure-sensitive adhesive layer with specific haze (15-50%) and storage elastic modulus (70,000-100,000 Pa) to convert the harmful rainbow stain effect into a beneficial light scattering effect. The scattering particles in the adhesive layer diffuse reflected light to reduce rainbow stains while maintaining display brightness, effectively transforming the adverse optical interference into a useful light diffusion mechanism.
Solution Approach 2:
The patent optimizes specific parameters of the pressure-sensitive adhesive layer including haze (15-50%), storage elastic modulus (70,000-100,000 Pa), and thickness (15-25 μm) to control light scattering characteristics. By adjusting these parameters, the adhesive layer achieves optimal balance between reducing rainbow stains and maintaining display luminance performance.
2Object-generated harmful factors
If scattering adhesive layer is added to reduce rainbow stains, then visual appreciation is improved, but device structure becomes more complex
Solution Approach 1:
The patent combines the pressure-sensitive adhesive layer with scattering particles directly into the polarizing plate structure, merging the adhesive function and light scattering function into a single integrated layer. This eliminates the need for separate scattering layers while achieving rainbow stain reduction, thereby reducing overall device complexity.
Solution Approach 2:
The pressure-sensitive adhesive layer serves multiple functions simultaneously: it provides adhesive bonding between layers, introduces scattering particles for light diffusion to reduce rainbow stains, and maintains mechanical stability. This multi-functionality reduces the need for additional dedicated components, simplifying the overall device structure.
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 polarizing plate effectively reduces rainbow stains, enhances visual appreciation, and provides excellent hardness and durability, maintaining performance under heat and moisture stress.
Implementation Method 1
a scattering pressure-sensitive adhesive layer present on one side of the polarizer... comprising scattering particles that may cause haze in the pressure-sensitive adhesive layer
Data Source
AI summary
The present application relates to a polarizing plate and a use thereof. The present application provides a polarizing plate capable of improving the problem of occurrence of rainbow stains in the appearance of an OLED display device, and exhibiting excellent visual appreciation, excellent hardness, and excellent heat-resistance and moisture-and-heat-resistance durability, and an OLED display device comprising the polarizing plate.