Color Conversion Display Pixel With Mask-Free Protective Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in achieving improved reliability and cost-effectiveness through complex fabrication processes involving multiple masks.
Innovation Solution
A display device design that includes a substrate with pixels featuring a light emitting element, organic transmission layer with light diffusion particles, and a color conversion layer, fabricated using a simplified process that eliminates the need for additional masks, thereby reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple masks are used in the fabrication process, then the light emitting element can be protected during manufacturing, but the production cost increases and the process becomes more complex
Solution Approach 1:
The patent extracts and removes the mask layer from the fabrication process. Instead of using multiple masks to protect the light emitting element during manufacturing, the invention applies an organic transmission layer directly to the light emitting element, eliminating the need for mask layers and simplifying the fabrication process while maintaining protection during manufacturing
Solution Approach 2:
The organic transmission layer serves as an intermediary substance between the light emitting element and the color conversion layer. This intermediate layer protects the light emitting element during fabrication without requiring masks, and also performs the function of light transmission and diffusion, replacing the protective function previously provided by mask layers
2Reliability
If multiple masks are used in the fabrication process, then the light emitting element can be protected during manufacturing, but the production cost increases
Solution Approach 1:
The patent extracts and removes the mask layer from the fabrication process. Instead of using multiple masks to protect the light emitting element during manufacturing, the invention applies an organic transmission layer directly to the light emitting element, eliminating the need for mask layers and simplifying the fabrication process while maintaining protection during manufacturing
Solution Approach 2:
The organic transmission layer serves as a disposable protective layer that is applied directly to the light emitting element. This single-use layer provides protection during fabrication without requiring expensive mask layers, and can be easily applied and removed or integrated into the final device structure
3Reliability
If the organic transmission layer is applied between the light emitting element and color conversion layer, then deterioration at the ends is prevented, but the fabrication process must be simplified
Solution Approach 1:
The organic transmission layer is applied in advance to the light emitting element before the color conversion layer is deposited. This preliminary application ensures that the light emitting element is protected from deterioration at the ends before subsequent fabrication steps, and the layer is already in place to facilitate the simplified fabrication process
Solution Approach 2:
The organic transmission layer serves as an intermediary substance between the light emitting element and the color conversion layer. This intermediate layer protects the light emitting element during fabrication without requiring masks, and also performs the function of light transmission and diffusion, replacing the protective function previously provided by mask layers
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 simplified fabrication process enhances reliability and reduces production costs while maintaining luminance and color conversion efficiency.
Implementation Method 1
an organic transmission layer covering the first end and the second end of the light emitting element, the organic transmission layer including a light diffusion particle
Implementation Method 2
a color conversion layer on the organic transmission layer, the color conversion layer including a color conversion particle to convert a first color of light emitted from the light emitting element to a second color of light
Data Source
AI summary
A display device may include: a substrate; and a pixel on the substrate, and including an emission area and a non-emission area. The pixel may include: a light emitting element in the emission area, the light emitting element including a first end and a second end; a first pixel electrode electrically connected to the first end of the light emitting element; a second pixel electrode electrically connected to the second end of the light emitting element; an organic transmission layer covering the first end and the second end of the light emitting element, organic transmission layer including a light diffusion particle; and a color conversion layer on the organic transmission layer, the color conversion layer including a color conversion particle to convert a first color of light emitted from the light emitting element to a second color of light.