Display Pixel Structure Using Yellow Filters and Quantum Dot Conversion
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Solution Overview
Problem
Existing display devices face challenges in achieving high-quality luminance and wide color gamut while maintaining cost-effectiveness and efficiency in manufacturing, particularly in the mass production of display devices for applications like televisions, computers, and smartphones.
Innovation Solution
The implementation of a display device design that replaces the traditional red and green light filter layers with yellow filter layers, enhancing light-emitting efficiency and simplifying the manufacturing process by reducing the number of required processes, and incorporates quantum dot films for color conversion layers to achieve a wide color gamut, along with a dielectric layer to improve light conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional red and green light filter layers are used, then color accuracy is maintained, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent combines the functions of red and green light filtering into a single yellow light filter layer. This yellow filter layer, when used with quantum dot films, achieves both color accuracy and wide color gamut while reducing the total number of filter layers from three (red, green, blue) to two (yellow, blue), thereby simplifying the manufacturing process and reducing production costs.
2Ease of manufacture
If yellow filter layers replace red and green filter layers, then manufacturing cost is reduced, but color gamut performance must be maintained
Solution Approach 1:
The patent employs composite material structures by combining yellow light filter layers with quantum dot films. The quantum dot films contain multiple sizes of quantum dots that convert blue light into different wavelengths, working synergistically with the yellow filter layer to achieve wide color gamut performance while maintaining cost-effectiveness through the simplified filter layer structure.
3Manufacturing precision
If quantum dot films are incorporated for color conversion, then color gamut is enhanced, but device structure complexity increases
Solution Approach 1:
The quantum dot films serve multiple functions: they act as color conversion layers that convert blue light to various wavelengths, serve as part of the light-emitting structure, and work in conjunction with the yellow filter layer to achieve wide color gamut. This multi-functionality reduces the need for separate components, thereby managing device structure complexity while enhancing color gamut performance.
4Productivity
If the number of filter layers is reduced, then manufacturing efficiency is improved, but light-emitting efficiency must be maintained or enhanced
Solution Approach 1:
The patent changes the optical parameters of the filter layers by using a yellow filter layer with specific transmittance characteristics instead of traditional red and green filters. This parameter change, combined with the quantum dot film's wavelength conversion properties, optimizes light transmission and emission efficiency while reducing the number of layers, thereby improving manufacturing efficiency without compromising light-emitting 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
This approach results in improved light-emitting efficiency, reduced production costs, and enhanced color gamut capabilities, making the display devices more cost-effective and efficient to manufacture while maintaining high-quality performance.
Implementation Method 1
incorporates quantum dot films for color conversion layers to achieve a wide color gamut
Implementation Method 2
replaces the traditional red and green light filter layers with yellow filter layers, enhancing light-emitting efficiency
Implementation Method 3
incorporates a dielectric layer to improve light conversion efficiency
Data Source
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AI summary
A display device is provided. The display device includes a plurality of pixels. One of the pixels includes a color conversion layer. The pixel also includes a dielectric layer disposed on the color conversion layer. The refractive index of the dielectric layer is less than the refractive index of the color conversion layer.