Display Panel Functional Layer Refractive Index for Color Mixing
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Solution Overview
Problem
Current display panels face challenges in achieving high display quality due to color mixing between adjacent pixel areas, which affects the overall image clarity and color accuracy.
Innovation Solution
The display panel incorporates a functional layer with a refractive index less than the inorganic encapsulation layer, featuring a partition wall with specific openings for each pixel area, and a filling layer with a flat and uneven surface, ensuring that the total reflection critical angle is below the reference incident angle, preventing light from mixing colors between pixel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional encapsulation structure is used, then the device structure is simple, but color mixing occurs between adjacent pixel areas reducing display quality
Solution Approach 1:
The patent introduces a functional layer with specific refractive index properties as an intermediary between the inorganic encapsulation layer and the emission layer. This functional layer acts as a mediator to control light propagation paths, preventing color mixing between adjacent pixels while maintaining encapsulation integrity. The functional layer's refractive index is specifically designed to be lower than the inorganic encapsulation layer to achieve optimal light control.
Solution Approach 2:
The patent modifies the refractive index parameter of the encapsulation structure by introducing a functional layer with a refractive index lower than the inorganic encapsulation layer. This parameter change enables precise control over light reflection and refraction at layer interfaces, directing light paths to prevent color mixing between adjacent pixel areas while maintaining display quality.
2Object-generated harmful factors
If the refractive index of the functional layer is lower than the inorganic encapsulation layer, then light control is improved preventing color mixing, but the manufacturing precision requirement increases
Solution Approach 1:
The patent specifies that the functional layer should have a refractive index lower than the inorganic encapsulation layer, creating a controlled parameter difference that directs light paths. This parameter change is designed to be achievable with standard materials while effectively preventing color mixing by controlling refraction and reflection at the layer interfaces.
Solution Approach 2:
The patent converts the potential harm of multiple layer interfaces (which could cause additional light scattering and complexity) into a benefit by carefully designing the refractive index gradient. The interfaces between layers with different refractive indices are engineered to reflect and refract light in specific patterns that prevent color mixing, turning what could be a source of optical interference into a solution for color isolation.
3Object-generated harmful factors
If a partition wall structure is added, then color mixing is prevented, but the device complexity increases
Solution Approach 1:
The functional layer serves multiple functions simultaneously: it provides encapsulation protection, controls light propagation paths through its refractive index properties, and acts as a partitioning structure to prevent color mixing. By combining these functions into a single layer design, the patent reduces overall device complexity compared to adding separate partition wall structures.
Solution Approach 2:
The patent merges the encapsulation function with the light control and partitioning functions into an integrated encapsulation structure. The functional layer is combined with the inorganic encapsulation layer to form a unified structure that simultaneously protects the emission layer and controls light paths, eliminating the need for separate partition wall components.
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
This configuration enhances display quality by preventing color mixing and improving color accuracy and luminous efficiency, while maintaining a uniform refractive index for effective light control.
Implementation Method 1
a total reflection critical angle between the inorganic encapsulation layer and the functional layer is less than a reference incident angle of reference light traveling from the first emission area toward the partition wall
Implementation Method 2
an inorganic encapsulation layer disposed on the top surface of the organic encapsulation layer and having a first refractive index; a functional layer disposed on the inorganic encapsulation layer and having a second refractive index less than the first refractive index
Data Source
AI summary
A display panel including a base layer; a circuit layer; an emission layer including first, second and third emission areas respectively corresponding to first, second and third pixel areas; an organic encapsulation layer having a flat top surface; an inorganic encapsulation layer on the top surface of the organic encapsulation layer and having a first refractive index; a functional layer disposed on the inorganic encapsulation aver and having a second refractive index less than the first refractive index; and a partition wall disposed on the functional layer and including first, second and third openings, wherein the first, second and third openings respectively correspond to the first, second and third pixel areas, wherein a total reflection critical angle between the inorganic encapsulation layer and the functional layer is less than a reference incident angle of reference light traveling from the first emission area toward the partition wall.