Switching Circuit Waveform Driving for Multi-Nozzle Inkjet Control
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Solution Overview
Problem
Conventional inkjet print head driving systems face challenges in achieving precise and homogeneous inkjet processes due to high temperature and heat dissipation issues, leading to inefficiencies and high costs in multi-channel load driving circuits, with existing technologies failing to provide independent driving signals to each channel effectively.
Innovation Solution
A switching driving method utilizing a control unit, switching strategy demodulation unit, memory unit, shifting unit, and counting unit to generate high-resolution driving waveforms by dividing signals into sections, transforming them into switching signals, and broadcasting these signals to the print head, allowing for independent control of each nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital/analog converter and amplifier are used to generate driving signals, then linearity of driving signal is improved, but temperature increases and heat dissipation is required
Solution Approach 1:
The patent replaces the conventional digital/analog converter and amplifier system with a switching circuit system that generates driving signals through high-speed switching. This substitution eliminates the need for high-voltage amplifiers, thereby reducing heat generation and temperature issues while maintaining signal linearity through precise switching control
Solution Approach 2:
The patent changes the operating parameters by using high-frequency switching signals instead of low-frequency analog signals. By operating in the high-frequency domain with small voltage swings and then switching to high-voltage states, the system achieves better linearity without the heat dissipation problems associated with conventional high-voltage amplifier operation
2Adaptability or versatility
If additional driving signals are added for multi-channel applications, then functionality is improved, but volume and unit price increase
Solution Approach 1:
The patent implements a universal switching circuit architecture that can drive multiple channels (nozzles) using the same core components. The switching circuit can be configured to drive different numbers of channels by simply adjusting the switching strategy, eliminating the need for separate amplifier circuits for each channel and reducing overall system volume and cost
Solution Approach 2:
The patent merges multiple driving functions into a single switching circuit system. Instead of having separate amplifier circuits for each channel, the system uses one switching circuit that can simultaneously or sequentially drive multiple channels through time-multiplexed or space-multiplexed switching strategies, thereby reducing component count and system volume
3Measurement precision
If conventional amplifier system is used, then driving signal linearity is improved, but independent control of each channel is not achieved
Solution Approach 1:
The patent segments the driving signal generation for each channel through independent switching control. Each channel or nozzle can be controlled by dedicated switching elements within the switching circuit, allowing independent waveform generation and adjustment for each channel while maintaining signal linearity through the switching mechanism
Data Source
AI summary
The present invention discloses a switching driving method used for a driving system. The driving system transforms any type of waveforms to switching signal array by switching strategy modulation, and transmits to switching circuit. Any type of driving waveforms can be generated through high-speed switching the switching circuit. The waveforms can be generated by operating the switching circuit with the switching strategy. The losses of the switch can be reduced, and the modulation ability of driving signal having several waveforms and multi-channels can be improved.