Wireless Power Delivery for Printing Carriage Noise Reduction
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Solution Overview
Problem
Printing apparatuses face issues with noise generation and unstable power supply due to physical wiring changes as the carriage moves, affecting printing quality.
Innovation Solution
A printing apparatus that uses coupling capacitance to wirelessly deliver power to the head unit, with the power supply unit adjusting power levels based on the type and properties of the recording medium, reducing noise and ensuring stable power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied to the head unit using physical wiring such as FFC or timing belt, then power can be delivered to the moving carriage, but noise is generated due to position changes of the wiring during carriage movement
Solution Approach 1:
The patent replaces the mechanical wiring system (FFC or timing belt) with a wireless power transmission system using electromagnetic coupling. The main body portion contains a power transmission unit with conductors that generate electromagnetic fields, which couple with conductors in the carriage to transfer power without physical contact, thereby eliminating noise generated by moving wiring.
2Power
If power is supplied using physical wiring, then power delivery is established, but the position of wiring changes greatly when carriage moves, causing noise to spread to each part of the printing apparatus
Solution Approach 1:
The patent eliminates the mechanical wiring system by implementing wireless electromagnetic coupling for power transmission. The power transmission unit in the main body portion generates electromagnetic fields that couple with reception conductors in the carriage, providing stable power delivery without the position changes and noise interference that affect printing quality.
3Object-affected harmful factors
If power is delivered through coupling capacitance, then wireless power supply is achieved, but delivery efficiency changes depending on the type of recording medium
Solution Approach 1:
The patent adjusts the power supply parameters based on the type of recording medium being used. The power supply unit modifies the power delivery characteristics according to the dielectric properties and thickness of the recording medium, ensuring optimal power transfer efficiency while maintaining the benefits of wireless coupling and noise reduction.
4Reliability
If the power supply unit supplies different amounts of power depending on recording medium type, then stable power supply is achieved, but the system complexity increases
Solution Approach 1:
The patent implements adaptive power supply control that adjusts power delivery parameters based on detected recording medium characteristics. The power supply unit receives information about the recording medium type and automatically modifies its output parameters to maintain stable power supply, with the control logic integrated into the existing power management system.
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 solution reduces noise and maintains stable power supply to the head unit, enhancing printing quality by eliminating the need for physical wiring and adjusting power according to the recording medium's characteristics.
Implementation Method 1
power that is supplied from the power supply unit is delivered to the head unit through a coupling capacitance that is formed by the first conductor and the second conductor
Data Source
AI summary
Provided is a printing apparatus including: a head unit that is provided with a discharge unit which discharges a liquid; a carriage into which the head unit is built; a power delivery unit that delivers at least a part of supplied power to the head unit; and a power supply unit that supplies power to the power delivery unit, in which the power delivery unit is provided with a first conductor and a second conductor, wherein power that is supplied from the power supply unit is delivered to the head unit through a coupling capacitance that is formed by the first conductor and the second conductor, and in which the power supply unit supplies different amounts of power to the power delivery unit depending on a type of a recording medium that is in a transport pathway.