Low-Conductivity Display Ink for Electric-Field LED Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display device manufacturing methods are complex and do not effectively enhance light emitting efficiency.
Innovation Solution
A specialized ink is developed containing a first solvent with low electrical conductivity and a second solvent with higher conductivity, along with light emitting elements comprising semiconductor layers, which are arranged between electrodes to form an electric field, allowing for simplified manufacturing and improved light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional manufacturing methods are used, then the manufacturing process is complex, but light emitting efficiency is not effectively enhanced
Solution Approach 1:
The patent changes the electrical conductivity parameter of the ink from conventional high conductivity to low conductivity (1.5 μS/m or less), and adjusts the dielectric constant to about 8.0 or less. These parameter changes enable the ink to align semiconductor layers effectively under an electric field while maintaining manufacturing simplicity, thus resolving the contradiction between ease of manufacture and light emitting efficiency.
Solution Approach 2:
The patent uses a composite ink formulation containing a first solvent with low electrical conductivity and a second solvent with higher conductivity, creating a balanced medium that provides both ease of handling and effective semiconductor layer alignment. This composite approach allows simplified manufacturing while achieving high light emitting efficiency.
2Ease of operation
If ink with higher electrical conductivity is used, then the ink is easier to handle, but semiconductor layer alignment under electric field is less effective
Solution Approach 1:
The patent optimizes the electrical conductivity parameter to a specific range (1.5 μS/m or less) that balances ink handleability with alignment effectiveness. This precise parameter control allows the ink to remain workable while responding sufficiently to electric fields for accurate semiconductor layer alignment.
Solution Approach 2:
The patent employs a composite solvent system where a first solvent provides low base conductivity for good alignment response, while a second solvent with higher conductivity ensures adequate ink handleability and flow properties. This composite formulation resolves the contradiction between ease of operation and manufacturing precision.
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 method simplifies the manufacturing process and enhances light emitting efficiency in display devices by aligning semiconductor layers within an electric field, ensuring stable and efficient light emission.
Implementation Method 1
forming an electric field between the first electrode and the second electrode
Implementation Method 2
When an electric field is applied to the light emitting element, external force may be applied to the first semiconductor layer of the light emitting element in a first direction, and external force may be applied to the second semiconductor layer of the light emitting element in a second direction opposite to the first direction
Data Source
AI summary
An ink for manufacturing a display device includes a solvent; and light emitting elements disposed in the solvent, wherein the light emitting elements include a first semiconductor layer including a first type of semiconductor and a second semiconductor layer including a second type of semiconductor, and an electrical conductivity of the ink is about 1.5 μS/m or less. Also provided are a method of manufacturing a display device using the ink and a display device manufactured by the method.