Low-Refractive Layer Structure for Uniform Color Conversion Displays
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Solution Overview
Problem
Existing display devices face challenges in improving display quality and light efficiency, particularly due to issues with refractive index mismatch and thickness variations in layers, which affect color uniformity and overall performance.
Innovation Solution
A low refractive layer is introduced, composed of a monomer represented by Formula 1, with hollow particles and curable functional groups, applied between the color conversion layer and the color filter layer, to minimize step differences and enhance spreadability, thereby improving display quality and light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional color conversion layer is used, then color conversion is achieved, but step differences and thickness variations occur, reducing display quality
Solution Approach 1:
A low refractive layer is introduced as an intermediary between the color conversion layer and the color filter layer. This layer has a refractive index lower than both adjacent layers, creating a gradient refractive index structure that reduces step differences and improves thickness uniformity while maintaining the functional complexity of the original structure
Solution Approach 2:
The low refractive layer is formed as a composite material containing hollow particles dispersed in a curable resin matrix. The hollow particles (with refractive index close to air) combined with the resin create a material with tailored low refractive index properties, solving the thickness uniformity issue while maintaining structural integrity
2Use of energy by moving object
If the refractive index of the color conversion layer is high, then color conversion efficiency is improved, but refractive index mismatch with adjacent layers occurs, reducing light efficiency
Solution Approach 1:
The patent applies the principle of local quality by creating spatial variation in refractive index across different layers. The color conversion layer maintains its high refractive index for efficient light conversion, while the low refractive layer provides a contrasting refractive index environment to reduce mismatch effects at interfaces, optimizing both conversion efficiency and light transmission
Solution Approach 2:
The refractive index parameter is strategically changed across layers to create a gradient structure. By positioning a low refractive index layer between high refractive index layers, the patent modifies the optical parameter distribution to minimize reflection and improve light efficiency without compromising color conversion performance
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 refractive layer reduces step differences and enhances display quality by securing compatibility with underlying layers, improving color uniformity and reducing thickness, thus enhancing the overall performance of the display device.
Implementation Method 1
Xa, Xb, and Xc may each independently be a curable functional group
Implementation Method 2
The low refractive layer may further include hollow particles
Data Source
AI summary
A low refractive layer and a display device are provided. The display device includes a plurality of light-emitting elements, a color conversion layer on the light-emitting elements, and a low refractive layer on the color conversion layer, wherein the low refractive layer includes a monomer represented by Formula 1. In Formula 1, R1 and R3 may each independently be a substituted or unsubstituted alkyl group or hydrogen, R2 may be a substituted or unsubstituted alkyl group having two or more carbon atoms, Xa, Xb, and Xc may each independently be a curable functional group, and n and m may each independently be a natural number in a range of 1 to 5.