Isomerizable LED Ink Solvent for Precise Dielectrophoretic Alignment
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Solution Overview
Problem
Existing methods for manufacturing inorganic light-emitting diode (LED) elements face challenges in achieving high durability and efficiency, particularly in high-temperature environments, and in ensuring precise alignment of light-emitting elements during the display device manufacturing process.
Innovation Solution
A light emitting element solvent with a functional group that undergoes an isomerization reaction in response to irradiated light or heat, allowing for adjustment of viscosity. This solvent is used in a light emitting element ink to disperse light emitting elements, which are then aligned on electrodes using a dielectrophoretic method, and the solvent is removed to improve alignment and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a solvent with fixed viscosity is used to disperse light emitting elements, then the dispersion stability is maintained, but the alignment precision and manufacturing efficiency are reduced
Solution Approach 1:
The patent applies the dynamics principle by using a solvent system where viscosity can be dynamically adjusted through isomerization reactions. The solvent transitions from a high-viscosity state (for stable dispersion) to a low-viscosity state (for precise alignment and efficient removal), allowing the system to adapt its properties to different manufacturing stages without requiring multiple separate solvent systems.
Solution Approach 2:
The patent implements parameter changes by utilizing isomerization reactions that alter the physical parameters of the solvent, specifically viscosity. The solvent molecules undergo structural changes (isomerization) in response to irradiated light or heat, which directly changes the viscosity parameter from high to low, enabling different functional requirements to be met at different processing stages.
2Stability of the object's composition
If a high-viscosity solvent is used to disperse light emitting elements, then dispersion stability is improved, but solvent removal efficiency and manufacturing productivity are reduced
Solution Approach 1:
The patent applies the dynamics principle by using a solvent system where viscosity can be dynamically adjusted through isomerization reactions. The solvent transitions from a high-viscosity state (for stable dispersion) to a low-viscosity state (for precise alignment and efficient removal), allowing the system to adapt its properties to different manufacturing stages without requiring multiple separate solvent systems.
Solution Approach 2:
The patent implements phase transitions through isomerization reactions that change the molecular structure and physical state properties of the solvent. The transition between isomers results in a phase-like change in viscosity, enabling the solvent to switch between a dispersed state (high viscosity) and a removable state (low viscosity), thereby improving both stability and removal efficiency.
3Reliability
If conventional solvents are used in the manufacturing process, then the process is simple, but alignment precision and element reliability are reduced
Solution Approach 1:
The patent applies the composite materials principle by creating a composite solvent system that combines multiple functional components: the base solvent, the isomerizable functional group, and the dispersing agents. This composite structure enables the solvent to perform multiple functions (dispersion, alignment, and easy removal) within a single system, improving element reliability while maintaining manufacturing simplicity.
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 solution enables the production of display devices with improved alignment and reliability of light emitting elements, enhanced durability, and increased efficiency, particularly in high-temperature environments, by utilizing a solvent with adjustable viscosity and effective dielectrophoretic alignment.
Implementation Method 1
The first element solvent may form the second element solvent as the double bond of the third functional group undergoes a cis-trans isomerization reaction in response to irradiated light.
Implementation Method 2
a transfer method using a dielectrophoresis (DEP) method has been developed
Implementation Method 3
removing the second element solvent
Data Source
AI summary
A light device solvent, a light emitting device ink comprising same, and a method for manufacturing a display device are provided. A method for manufacturing a display device comprises the acts of: spraying a device ink, which comprises a first element solvent and a light emitting element dispersed in the first element solvent, onto a target substrate having a first electrode and a second electrode thereon; forming a second element solvent, which has an isomeric structure of the molecular structure of the first element solvent, and loading the light emitting element on the first electrode and the second electrode; and removing the second element solvent.