Display Device Scattering Particle Filler Color Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flat panel displays, such as OLEDs and LCDs, face challenges in maintaining color coordinates and luminance stability when viewed from different angles due to ambient light reflection and internal element damage from scattering particles.
Innovation Solution
Incorporating a filler with scattering particles between the substrates, where the particles have an average diameter of 100 nm to 20 μm and a refractive index difference of 0.03 to 0.5 with the filler, made from materials like silicone or epoxy resin, to reduce color coordinate changes and prevent damage to internal elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If scattering particles are added to reduce color coordinate changes, then color stability is improved, but internal elements may be damaged
Solution Approach 1:
The patent changes the particle size parameter to less than 50 μm and controls the concentration of scattering particles in the sealant to optimize the balance between color stability and element protection. This parameter optimization resolves the contradiction by finding the optimal range that provides sufficient scattering effect while minimizing mechanical damage risk
Solution Approach 2:
The patent uses a composite sealant material combining scattering particles with specific resin materials (epoxy, silicone, or acrylic resin) to achieve both color stability and element protection. The composite formulation allows the scattering particles to provide optical stability while the resin matrix provides mechanical protection and proper particle distribution
2Reliability
If additional pattern films are added to protect internal elements, then element protection is improved, but device complexity increases
Solution Approach 1:
The patent makes the sealant perform multiple functions: sealing, scattering ambient light, and protecting internal elements. By integrating these functions into a single component, the patent eliminates the need for separate pattern films while maintaining element protection, thus reducing device complexity
Solution Approach 2:
The patent combines the sealing function and the light scattering protection function into a single sealant layer. This merging of functions eliminates the need for additional pattern films that would otherwise be required to protect internal elements from ambient light, 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 use of scattering particles in the filler effectively reduces color coordinate changes by 30% and maintains luminance while minimizing the risk of damage to internal components, eliminating the need for additional pattern films and reducing costs.
Implementation Method 1
scattering particles in the filler, the scattering particles having an average particle diameter that is less than a maximum height of the pixel defining layer
Data Source
AI summary
A display device includes a first substrate, a second substrate facing the first substrate, a first electrode on the first substrate, a pixel defining layer on the first substrate, the pixel defining layer including an opening corresponding to the first electrode, a light emission layer on the first electrode, a second electrode on the light emission layer, a filler between the first substrate and the second substrate, and scattering particles in the filler, the scattering particles having an average particle diameter that is less than a maximum height of the pixel defining layer.