Quantum Dot Color Filter Substrate for Rapid Solvent Evaporation
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Solution Overview
Problem
The process of removing solvents from perovskite ink after inkjet printing in display panels is time-consuming and inefficient, leading to increased production costs.
Innovation Solution
A quantum dot color filter substrate with a transparent conductive layer connected to a power module forms a closed circuit, allowing heat generation through applied voltage to rapidly evaporate solvents from the quantum dot film layer, replacing traditional baking methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional hot stage baking is used to remove solvents from perovskite ink, then solvent removal can be achieved, but the process is time-consuming and energy inefficient
Solution Approach 1:
The patent replaces the traditional mechanical hot stage baking system with an electrical heating system. A transparent conductive layer is patterned to form heating elements that can be electrically connected to a power source, enabling localized and controlled heating to evaporate solvents from the perovskite ink without requiring a bulky hot stage apparatus.
Solution Approach 2:
The patent changes the heating method from conventional thermal conduction (hot stage) to electrical resistance heating. By controlling the electrical parameters (voltage, current) applied to the transparent conductive layer, the heating process can be precisely controlled to achieve rapid solvent evaporation with improved energy efficiency and reduced processing time.
2Productivity
If transparent conductive layer is added to enable electrical heating, then solvent removal efficiency improves, but device structure becomes more complex
Solution Approach 1:
The transparent conductive layer serves multiple functions: it acts as both an electrical conductor for power delivery and a heating element for solvent evaporation. This multi-functionality reduces the need for separate components, thereby improving productivity while limiting the increase in structural complexity.
Solution Approach 2:
The patent merges the electrical conductor and heater functions into a single integrated transparent conductive layer. This layer is patterned to form both electrical pathways and heating zones, combining what would traditionally be separate components into one unified structure that enables efficient solvent removal.
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 achieves rapid and uniform solvent removal with energy savings, improving production efficiency and reducing costs.
Implementation Method 1
A transparent conductive layer is disposed under the quantum dot film layer and is externally connected to a power module to form a closed circuit. In the closed circuit, the transparent conductive layer is equivalent to a resistor, when a voltage is applied to the transparent conductive layer, the transparent conductive layer generates heat, which can quickly remove solvents in the quantum dot film layer.
Implementation Method 2
when a voltage is applied to the transparent conductive layer, the transparent conductive layer generates heat, which can quickly remove solvents in the quantum dot film layer
Data Source
AI summary
A quantum dot color filter substrate includes a substrate, a color filter layer, a quantum dot film layer, and a transparent conductive layer disposed between the color filter layer and the quantum dot film layer. The transparent conductive layer is externally connected to a power module to form a closed circuit. When a voltage is applied to the transparent conductive layer, the transparent conductive layer may generate heat, which can quickly remove solvents in a quantum dot film layer.