Segmented Polymer Quantum Dot Film for Flexible Displays
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Solution Overview
Problem
Quantum dot films used in flexible display panels suffer from poor bending characteristics and are prone to cracking due to the inorganic nature of quantum dots, leading to a significant decrease in service life as they cannot recover flatness after repeated bending.
Innovation Solution
A quantum dot film comprising a combination of quantum dots and polymer molecular chains with a first segment having a high tensile modulus and a second segment with a low flexural modulus, enhancing mechanical stability and bending performance by preventing cracks and unrecoverable deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If quantum dot film is used in flexible display panels, then the display can be bent, but the quantum dot film cracks and cannot recover flatness after repeated bending
Solution Approach 1:
The patent uses a composite polymer structure consisting of a first segment with high tensile modulus and a second segment with low flexural modulus. This composite material design allows the quantum dot film to simultaneously achieve bending capability and resistance to cracking, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The patent applies different material properties to different segments of the polymer chain. The first segment provides high tensile modulus for crack resistance, while the second segment provides low flexural modulus for bending flexibility. This local differentiation of material properties enables the film to withstand both bending and tensile stresses during repeated bending cycles.
2Ease of operation
If quantum dot film is bent repeatedly, then flexibility is demonstrated, but the film develops cracks and unrecoverable deformation
Solution Approach 1:
The patent employs a composite polymer architecture where the first segment contributes high tensile modulus for mechanical strength and crack resistance, while the second segment contributes low flexural modulus for bending flexibility. This composite structure enables the film to maintain mechanical stability during repeated bending operations.
Solution Approach 2:
The patent divides the polymer molecular chain into distinct functional segments: a first segment for providing tensile strength and a second segment for providing flexural flexibility. This segmentation allows each part to perform its specialized function, enabling the film to bend easily while resisting crack formation.
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 film's improved mechanical stability extends its service life by allowing easy bending and recovery, preventing cracks and decomposition under illumination and electric current, thus maintaining performance over multiple bending cycles.
Implementation Method 1
the first segment has a tensile modulus greater than that of the second segment, and the second segment has a flexural modulus less than that of the first segment
Implementation Method 2
the polymer molecular chain comprises at least one first segment and at least one second segment; wherein, the first segment has a tensile modulus greater than that of the second segment
Data Source
AI summary
The present disclosure provides a quantum dot film, a quantum dot device, and a display panel. The provided quantum dot film comprises a plurality of quantum dots and a plurality of polymer molecular chains. The polymer molecule chain comprises at least one first segment and at least one second segment, wherein the first segment has a tensile modulus greater than that of the second segment, and the second segment has a flexural modulus less than that of the first segment.