Wireless Power Transmission Voltage Control for Inkjet Printers
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Solution Overview
Problem
Conventional inkjet printers with wireless power transmission face inefficiencies due to varying power consumption based on print data, leading to wasteful power consumption and heat or radiation noise, as they lack adaptive power transmission control suited to the state of the printing apparatus.
Innovation Solution
A printing apparatus with a power transmission unit using a Class E amplifier for wireless power transmission, where the power transmission voltage is controlled based on print data to maintain zero voltage switching (ZVS) and optimize load impedance, thereby enhancing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless power transmission is introduced to supply power to the carriage, then the FFC can be made wireless and reliability is improved, but power transmission efficiency deteriorates due to lack of adaptive control
Solution Approach 1:
The patent applies dynamics by making the power transmission voltage adjustable rather than fixed. The control unit dynamically changes the power transmission voltage based on the power consumption required by the discharge unit, allowing the system to adapt to varying operational states and maintain optimal power transmission efficiency
Solution Approach 2:
The patent changes the parameter of power transmission voltage to resolve the contradiction. By adjusting the voltage level according to the actual power needs of the discharge unit, the system achieves both reliable wireless power transmission and efficient energy utilization, avoiding the fixed voltage limitations
2Device complexity
If fixed power transmission voltage is used, then device complexity is reduced, but power transmission efficiency deteriorates due to mismatch with varying power consumption
Solution Approach 1:
The patent introduces parameter changes by making the power transmission voltage variable based on print data analysis. The control unit calculates required power consumption from print data and adjusts the voltage accordingly, achieving efficient power transmission without requiring complex additional hardware
3Ease of operation
If power transmission voltage is not adjusted according to power consumption, then ease of operation is improved, but energy waste increases due to excessive power transmission
Solution Approach 1:
The patent implements feedback by using print data to determine the power consumption requirements of the discharge unit, then adjusting the power transmission voltage accordingly. This closed-loop approach ensures power is transmitted efficiently without waste, while the control unit automatically manages the adjustment process
Solution Approach 2:
The patent applies preliminary action by analyzing print data before discharge to predict power consumption requirements. The control unit prepares the appropriate power transmission voltage in advance based on the print data analysis, ensuring efficient power delivery from the start of the discharge operation
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 solution achieves high-efficiency power transmission by dynamically adjusting the power transmission voltage according to print data, reducing wasteful power consumption and heat/radiation noise, and ensuring efficient operation of the ink head.
Implementation Method 1
a power transmission unit configured to wirelessly supply power to the discharge unit for discharging the ink
Data Source
AI summary
A printing apparatus includes a discharge unit that discharges ink onto a print medium based on print data, a power transmission unit that to wirelessly supplies power to the discharge unit for discharging the ink, and a control unit that controls the power to be supplied by the power transmission unit based on the print data.