Sub-Pixel Color Conversion Layout for Higher-Efficiency Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face limitations in enhancing optical efficiency and resolution, particularly in achieving high-performance color display capabilities.
Innovation Solution
A display device configuration including a substrate with sub-pixel regions, reflective and transmissive blue layers, color conversion layers, and partition walls, utilizing quantum dots and nanoparticles to optimize light emission and transmission, with a stacked structure of silicon oxide and nitride layers for improved optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional display device structure is used, then the device complexity is low, but the optical efficiency and resolution are limited
Solution Approach 1:
The display device is divided into multiple sub-pixel regions (first, second, and third sub-pixel regions) with distinct functional layers. Each region contains specific color conversion layers (green, red, blue) and reflective/transmissive layers, allowing independent optimization of optical paths for each color channel, thereby improving overall optical efficiency while maintaining manageable device complexity through modular segmentation
Solution Approach 2:
Different regions of the display device are assigned different optical properties: the first sub-pixel region uses a green color conversion layer with specific reflective characteristics, the second uses red color conversion with different reflective properties, and the third uses blue transmissive layers. This local differentiation of optical qualities allows each region to be optimized for its specific function, improving overall optical efficiency without requiring uniform complexity across the entire device
2Manufacturing precision
If simple color conversion layers are used, then the device complexity is low, but the color display performance and resolution are insufficient
Solution Approach 1:
The display device employs composite material structures including quantum dots embedded within color conversion layers, combined with stacked silicon oxide and silicon nitride layers. These composite materials enable precise control over light emission and color properties, achieving high resolution and accurate color display while the layered composite structure allows for systematic manufacturing processes that manage the complexity of implementing multiple functional materials
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 described configuration enhances optical efficiency and resolution by effectively converting and transmitting blue light across sub-pixel regions, allowing for improved color display performance.
Implementation Method 1
a blue light emitting layer provided on the lower reflective electrodes
Implementation Method 2
a green color conversion layer provided on the encapsulation layer in the first sub pixel region
Implementation Method 3
a blue reflective layer provided on both the green color conversion layer and the color conversion layer
Implementation Method 4
the display device may further include quantum dots inside the color conversion layer and the green color conversion layer
Data Source
AI summary
Disclosed is a display device. An embodiment of the inventive concept provides a display device that includes a substrate including a first sub pixel region, a second sub pixel region, and a third sub pixel region, reflective bottom electrodes provided on the substrate, a blue light emitting layer provided on the lower reflective electrodes, an encapsulation layer provided on the blue light emitting layer, a green color conversion layer provided on the encapsulation layer in the first sub pixel region, a color conversion layer provided on the encapsulation layer in the second sub pixel region, a blue reflective layer provided on both the green color conversion layer and the color conversion layer, and a blue transmissive layer disposed adjacent to the color conversion layer and provided on the encapsulation layer in the third sub pixel region.