Quantum Dot Color Conversion Layer for Mini-LED Edge Blue Light Leakage
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Solution Overview
Problem
The blue light leakage on the periphery of mini-LED display panels due to water and oxygen erosion of quantum dots on the edge of the color conversion layer, which affects the display effect.
Innovation Solution
A display panel design with a color conversion layer comprising a quantum dot layer and protective layers on both sides, where the quantum dot layer has a thicker second conversion portion surrounding the thinner first conversion portion, increasing the quantum dot density near the edge to prevent erosion and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the quantum dot color conversion film is cut into small pieces, then the display panel can be manufactured with mini-LED light sources, but the quantum dots on the periphery fail due to water and oxygen erosion causing blue light leakage
Solution Approach 1:
The patent applies preliminary action by forming a protective layer on the quantum dot color conversion film before cutting it into pieces. This protective layer is applied in advance to prevent water and oxygen from eroding the quantum dots on the periphery after cutting, thus solving the blue light leakage problem while maintaining manufacturing efficiency
Solution Approach 2:
The patent uses a protective layer as an intermediary substance between the quantum dots and the harmful environment (water and oxygen). This protective layer acts as a barrier that prevents direct contact between water/oxygen and the quantum dots, thereby protecting the quantum dots from erosion and preventing blue light leakage
2Reliability
If protective layers are added on both sides of the quantum dot layer, then quantum dot erosion is prevented, but the device structure becomes more complex
Solution Approach 1:
The patent uses thin film protective layers on both sides of the quantum dot layer to protect the quantum dots from water and oxygen erosion. These thin films provide effective protection while adding minimal structural complexity, as they are thin and can be integrated into the existing color conversion layer structure
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 design effectively prevents quantum dot failure from water and oxygen erosion, reducing blue light leakage and enhancing the white light conversion rate of the display panel.
Implementation Method 1
a quantum dot color conversion film is usually designed with a three-layer structure, and a middle layer is a mixed layer of quantum dot particles and an optical glue
Data Source
AI summary
The present application provides a display panel, a fabrication thereof, and a mobile terminal. The display panel includes a light-emitting substrate and a color conversion layer disposed on a light-emitting side of the light-emitting substrate, and the color conversion layer includes two protective layers and a quantum dot layer disposed between the two protective layers. The quantum dot layer includes a first conversion portion and a second conversion portion, the second conversion portion is disposed on an end face of the first conversion portion and surrounds the first conversion portion. Along a direction perpendicular to the light-emitting substrate, a thickness of the second conversion portion is greater than a thickness of the first conversion portion.