Dual Head Liquid Ejection System Power Stability Control
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Solution Overview
Problem
Existing liquid ejection systems that operate with USB bus power face instability in power supply due to varying operational states, leading to potential decreases in ejection accuracy.
Innovation Solution
A liquid ejection system comprising two head units, each equipped with USB connectors, determining circuits, drive circuits, and ejecting heads. When the power supply voltage is determined to be abnormal, both head units stop ejecting liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liquid ejecting apparatus operates with USB bus power, then the power supply is simplified and easier to connect, but the amount of power supplied becomes unstable leading to decreased ejection accuracy
Solution Approach 1:
The system performs preliminary detection of power supply voltage stability before initiating liquid ejection operations. The determination circuit checks whether the power supply voltage is within normal ranges, and only when stability is confirmed does the system proceed with ejection operations. This preliminary action prevents accuracy degradation by avoiding operations under unstable power conditions.
2Manufacturing precision
If multiple liquid ejecting apparatuses are coupled together to improve image quality, then the image formation capability is enhanced, but the complexity of power supply monitoring and coordination increases
Solution Approach 1:
The liquid ejection system is divided into multiple independent head units, each with its own determination circuit for monitoring power supply voltage. This segmentation allows each head unit to independently assess power stability and control its own ejection operations, simplifying the overall monitoring architecture while enabling coordinated multi-head operation for enhanced image quality.
3Reliability
If the liquid ejecting apparatus monitors power supply state and performs appropriate operations, then the reliability of operation is improved, but the system complexity increases due to additional monitoring circuits
Solution Approach 1:
The determination circuit is designed with multi-functionality to monitor multiple power supply parameters (voltage levels, stability) and generate appropriate control signals for different operational states. By consolidating multiple monitoring functions into a single integrated circuit, the system achieves high operational reliability without proportionally increasing complexity.
Data Source
AI summary
A liquid ejection system includes a first head unit and a second head unit. The first head unit includes a first determining circuit that determines whether a first power supply voltage is normal, a first drive circuit that outputs a first drive signal based on the first power supply voltage, and a first ejecting head that ejects liquid The second head unit includes a second determining circuit that determines whether a second power supply voltage is normal, a second drive circuit that outputs a second drive signal based on the second power supply voltage, and a second ejecting head that ejects liquid When the first determining circuit determines that the first power supply voltage is not normal, or when the second determining circuit determines that the second power supply voltage is not normal, the first ejecting head and the second ejecting head stop ejecting the liquid.