Thermochromic Coating Pre-heating for Energy Reduction
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Solution Overview
Problem
Existing thermochromic imaging systems face inefficiencies in energy usage and print speed due to the need for high-energy patterned heating to achieve color changes in thermochromic materials, as they require heating above a threshold temperature for visible color changes, which demands significant energy and can lead to heat loss and inefficiencies.
Innovation Solution
A system comprising a first heater to pre-heat a substrate and thermochromic coating to a temperature below the threshold, a second heater to pre-heat the ambient environment, and a patterned heater to selectively heat the thermochromic coating above the threshold temperature according to a predetermined pattern, reducing energy demands and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-energy patterned heating is used to achieve color changes in thermochromic materials, then color change is achieved, but energy consumption increases and print speed decreases
Solution Approach 1:
The patent applies preliminary action by pre-heating the substrate and/or ambient environment to a temperature close to but below the thermochromic material's threshold temperature before applying the patterned heating. This pre-heating step reduces the temperature differential that must be overcome during patterned heating, thereby reducing the energy consumption and enabling faster color changes while maintaining precise pattern control.
2Temperature
If high-energy patterned heating is used to achieve color changes in thermochromic materials, then color change is achieved, but print speed decreases
Solution Approach 1:
The patent applies preliminary action by pre-heating the substrate and/or ambient environment to a temperature close to but below the thermochromic material's threshold temperature before applying the patterned heating. This pre-heating step reduces the temperature differential that must be overcome during patterned heating, thereby reducing the energy consumption and enabling faster color changes while maintaining precise pattern control.
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 approach reduces energy requirements by pre-heating the substrate and ambient environment, allowing for faster and more efficient color changes with a 59% digital energy requirement reduction, enhancing print speed and operational efficiency in thermochromic imaging systems.
Implementation Method 1
a first heater configured to heat at least one of a substrate and a thermochromic coating disposed on the substrate
Implementation Method 2
a second heater configured to heat an ambient environment surrounding the thermochromic coating
Implementation Method 3
a patterned heater configured to heat the pre-heated thermochromic coating to one or more temperatures above the threshold temperature according to a predetermined pattern
Implementation Method 4
Thermochromic materials change color in response to exposure to temperature and light
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
An imaging system includes first and second heaters configured to pre-heat a thermochromic coating. The first heater heats at least one of a substrate and the thermochromic coating disposed on the substrate. The second heater heats an ambient environment surrounding the thermochromic coating. The first and second heaters are configured to pre-heat the thermochromic coating to a temperature below a threshold temperature of the thermochromic coating. The system further includes a patterned heater configured to heat the pre-heated thermochromic coating to one or more temperatures above the threshold temperature according to a predetermined pattern.