Latent Resistive Image Layer for High Speed Thermal Printing
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Solution Overview
Problem
Digital printing technologies are limited by speed and efficiency when using high viscosity, high pigment concentration inks, leading to issues like ghosting and reduced productivity due to the challenges of transferring viscoelastic marking materials effectively.
Innovation Solution
The implementation of a latent resistive layer with tunable resistivity, allowing for selective heating and energy transfer to overcome adhesion and cohesive forces, enabling efficient transfer of viscoelastic marking materials by modulating the resistivity between high and low impedance states using phase change materials and controlled heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If digital printing uses high viscosity, high pigment concentration inks to improve image quality and reduce bleed, then manufacturing precision improves, but productivity decreases due to slow transfer speed
Solution Approach 1:
The patent applies a tunable resistivity layer that dynamically changes its electrical resistance between high and low impedance states. This dynamic property allows the system to adapt to different printing requirements: high impedance for precise image areas and low impedance for faster transfer, resolving the contradiction between image quality and print speed
Solution Approach 2:
The patent changes the electrical resistivity parameter of the intermediate layer to optimize both image quality and transfer speed. By modulating resistivity between high and low states, the system achieves precise ink transfer for high-quality images while maintaining high productivity through rapid state transitions
2Productivity
If thermal energy is increased to improve transfer speed of viscoelastic marking materials, then productivity improves, but energy consumption increases
Solution Approach 1:
The patent utilizes phase change materials in the tunable resistivity layer that transition between crystalline and amorphous states. These phase transitions enable rapid resistivity changes without requiring continuous high energy input, allowing fast transfer speeds with reduced overall energy consumption
Solution Approach 2:
The patent employs periodic pulsing of electrical energy to the tunable resistivity layer rather than continuous heating. This periodic action achieves the necessary thermal effects for rapid ink transfer while significantly reducing total energy consumption through pulsed rather than sustained energy delivery
3Productivity
If electrical resistivity is reduced to improve ink transfer efficiency, then productivity improves, but image quality deteriorates due to loss of selective adhesion control
Solution Approach 1:
The patent uses a dynamically tunable resistivity layer that can switch between high and low impedance states. This dynamic control allows selective adhesion: low impedance regions enable efficient ink transfer while high impedance regions maintain selective adhesion control, preserving image quality alongside high transfer efficiency
Solution Approach 2:
The patent applies different electrical resistivity properties to different regions of the intermediate layer. Image areas maintain high resistivity for selective adhesion control while non-image areas use low resistivity for efficient transfer, achieving both high productivity and image quality through spatially varying properties
4Manufacturing precision
If digital printing uses variable data with high pigment concentration inks, then manufacturing precision improves, but ghosting occurs due to incomplete ink removal
Solution Approach 1:
The patent employs a dynamically tunable resistivity layer that can rapidly switch between high and low impedance states. This dynamic control ensures complete ink removal from non-image areas by maintaining low resistivity during transfer, preventing ghosting while preserving variable data quality through precise resistivity modulation
Solution Approach 2:
The patent implements feedback control through the tunable resistivity layer that responds to printing conditions. The system monitors and adjusts resistivity in real-time to ensure complete ink transfer and prevent residual ink accumulation that causes ghosting, maintaining high variable data quality
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 enables near 100% efficient transfer of viscoelastic marking materials without ghosting, improving print speed and productivity by reducing energy requirements and maintaining image quality, even with high viscosity inks.
Implementation Method 1
a latent resistive image layer is formed in an image receiving structure. The resistive image layer can be optically or electrically heated and transformed from a high impedance electrical state to a low impedance electrical state
Implementation Method 2
The tunable-resistivity material can include phase change materials that can be repeatedly switched between amorphous and crystalline phases with low power semiconductor lasers
Data Source
AI summary
An imaging system including an image receiving structure including a tunable-resistivity material; and an energy source to emit an energy beam at the image receiving structure to pattern-wise program the tunable-resistivity material. A resistivity can be pattern-wise changed. Marking material can be pattern-wise adhered in response to the pattern-wise changed resistivity.