Quantum Dot Display Panel Layer Segmentation for Uniform Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panels with quantum dot light-emitting layers face challenges in achieving improved emission quality and efficiency through complex manufacturing processes.
Innovation Solution
A display panel structure comprising light-emitting electrodes, intermediate layers, a bank layer, a counter electrode, and quantum dot light-emitting layers, with specific configurations and manufacturing steps to enhance emission quality and simplify the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a quantum dot light-emitting layer is formed directly on a light-emitting electrode, then the manufacturing process is simple, but the emission quality and uniformity are poor
Solution Approach 1:
The patent divides the intermediate layer into two separate layers: a first intermediate layer formed on the light-emitting electrode, and a second intermediate layer formed on the first intermediate layer within openings of a bank layer. This segmentation allows each layer to be optimized independently - the first intermediate layer ensures good interface contact and thickness uniformity, while the second intermediate layer enhances emission quality, thereby resolving the contradiction between manufacturing simplicity and emission uniformity.
2Illumination intensity
If intermediate layers are made thicker to improve emission quality, then light uniformity improves, but the device thickness and complexity increase
Solution Approach 1:
By segmenting the intermediate layer into two thinner layers rather than using one thick layer, the patent achieves improved light uniformity and emission quality while maintaining reasonable overall thickness. The segmented structure allows better control over each layer's properties and reduces the complexity associated with forming and controlling a single thick layer.
3Illumination intensity
If the intermediate layer thickness is increased to improve emission quality, then brightness uniformity improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the intermediate layer into two layers, which reduces the thickness control precision requirements for each individual layer compared to forming a single thick layer. This segmentation makes the manufacturing process more feasible while still achieving the desired brightness uniformity and emission quality enhancement.
Data Source
AI summary
A display panel includes light-emitting electrodes respectively disposed in first to third emission areas, first intermediate layers respectively disposed in the first to third emission areas and respectively overlapping the light-emitting electrodes, a bank layer covering an edge of each of the first intermediate layers and including openings respectively overlapping the first intermediate layers, a counter electrode disposed on the bank layer and covering the light-emitting electrodes, quantum dot light-emitting layers arranged below the counter electrode and respectively disposed in the first to third emission areas, and a second intermediate layer between the first intermediate layer in the first emission area and the quantum dot light-emitting layer in the first emission area. The second intermediate layer is disposed in an opening of the bank layer corresponding to the first emission area, the opening being one of the openings of the bank layer.