Quantum Dot Micro-LED Display Structure for Color Reproducibility
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Solution Overview
Problem
Existing display devices face challenges in achieving improved color reproducibility and color viewing angle, particularly when utilizing ultra-small LEDs.
Innovation Solution
Incorporating a thin film transistor substrate with ultra-small LEDs, pixel and common electrodes at different or same layers, color conversion layers with quantum dots, and encapsulation layers, along with blue light blocking layers to enhance color reproduction and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If ultra-small LED elements are used to reduce pixel size, then device miniaturization is achieved, but color reproducibility and viewing angle deteriorate
Solution Approach 1:
A color conversion layer is introduced as an intermediary between the blue LED element and the viewer. This layer contains quantum dots that convert the blue light into red and green wavelengths, enabling full-color display from a single blue light source and improving color reproducibility in miniaturized pixels
Solution Approach 2:
The patent changes the physical parameters of the LED structure by using ultra-small dimensions (micrometer or nanoscale) for the LED element while maintaining color quality through the color conversion layer, achieving both miniaturization and color accuracy
2Volume of moving object
If ultra-small LED elements are used to reduce pixel size, then device miniaturization is achieved, but color viewing angle deteriorates
Solution Approach 1:
The color conversion layer acts as a mediator that converts blue light into multiple wavelengths (red and green), enabling wide viewing angles by ensuring consistent color output across different viewing positions, thus improving adaptability in miniaturized display devices
3Manufacturing precision
If multiple layers with pixel and common electrodes are used to improve color reproduction, then color reproducibility is improved, but device complexity increases
Solution Approach 1:
Multiple functional layers (passivation films, pixel electrodes, common electrodes, color conversion layers) are merged into a single integrated structure above the LED element, achieving improved color reproducibility while managing complexity through systematic integration
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 solution significantly improves color reproducibility and viewing angles by effectively converting and blocking light, resulting in enhanced display performance.
Implementation Method 1
a color conversion layer on the light emitting element and including a plurality of quantum dot materials
Implementation Method 2
a blue light blocking layer, wherein the blue light blocking layer is on the color conversion layer
Data Source
AI summary
A display device includes a thin film transistor substrate having a thin film transistor, a light emitting element including an ultra-small LED element on the thin film transistor substrate, a pixel electrode connected to one end of the thin film transistor and one end of the light emitting element, a common electrode on the thin film transistor substrate and connected to an other end of the light emitting element, a color conversion layer on the light emitting element and including a plurality of quantum dot materials, and an encapsulation layer on the color conversion layer.