Inkjet Wiring Segmentation to Suppress Radiation Noise
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Solution Overview
Problem
Conventional ink jet printers experience increased radiation noise due to high-frequency signal transmission, particularly when power and control data wires coexist with jetting-data transmission wires in the same wiring member, leading to strong magnetic fields and noise interference.
Innovation Solution
The solution involves separating jetting-data transmission wires from other wires by using two distinct flexible wiring members, where all jetting-data transmission wires are formed on one member and other wires on the second member, and arranging these members to bend on different planes to prevent overlap and reduce magnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmission frequency of jet control data is increased to maintain print speed with more nozzles, then productivity is improved, but radiation noise from the wiring member increases
Solution Approach 1:
The wiring member is divided into multiple independent wiring members, with jetting-data transmission wires assigned to one member and other wires (power supply, ground) assigned to separate members. This segmentation isolates the high-frequency data transmission from other electrical components, preventing magnetic field interference and reducing radiation noise while maintaining high transmission frequency for productivity.
2Device complexity
If jetting-data transmission wires and other wires are provided in the same wiring member, then device complexity is reduced, but radiation noise increases due to magnetic field interference
Solution Approach 1:
The single wiring member containing all wires is segmented into multiple specialized wiring members. One wiring member contains only jetting-data transmission wires, while other wiring members contain power supply wires, ground wires, and other non-data wires. This segmentation eliminates magnetic field interference between different wire types while keeping the overall wiring structure manageable through modular organization.
3Productivity
If the number of nozzles is increased to improve printing capability, then productivity is improved, but the amount of jet control data increases requiring higher transmission frequency which worsens radiation noise
Solution Approach 1:
As the number of nozzles increases and requires more jet control data transmission, the wiring system is segmented to dedicate specific wiring members exclusively to high-frequency data transmission. This allows the data transmission wires to operate at higher frequencies without interference from power supply or ground wires, enabling support for increased nozzle count while controlling radiation noise.
Solution Approach 2:
The jetting-data transmission wires are extracted from the general wiring member and placed in a dedicated wiring member. This extraction isolates the high-frequency data signals from other electrical components, allowing the data transmission to proceed at high frequencies necessary for increased nozzle count without generating excessive radiation noise that would occur if all wires were bundled together.
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 configuration effectively suppresses radiation noise and minimizes strong magnetic fields around non-jetting-data wires, enhancing the reliability and efficiency of high-frequency data transmission in ink jet printers.
Implementation Method 1
a strong magnetic field is generated around the wires other than the jetting-data transmission wires, due to the influence of a magnetic field which is generated around the jetting-data transmission wires by transmitting the high-frequency signal
Data Source
AI summary
There is provided a liquid jetting apparatus including: a main body, a liquid jetting head including a plurality of nozzles, a first board including a data generation circuit which generates a jetting control data, a second board, and first and second wiring members respectively connecting the liquid jetting head and the first and second boards, wherein the first wiring member is provided with jetting-data transmission wires, and the first wiring member is arranged to bend on an inner side of the second wiring member.