Liquid Ejecting Head Parallel Wiring Noise Suppression
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Solution Overview
Problem
As the number of liquid ejecting elements in liquid ejecting heads increases for high-speed processing and high-resolution image printing, the increased current flowing through the wiring leads to significant noise interference with control signals, potentially disrupting the intended liquid ejecting action.
Innovation Solution
The liquid ejecting head incorporates a power source terminal and a ground terminal arranged adjacent to each other, with their respective wirings partially arranged in parallel to connect with the liquid ejecting element substrate, effectively suppressing noise interference by canceling out magnetic fields and ensuring reliable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of liquid ejecting elements is increased for high-speed processing and high-resolution printing, then productivity and measurement precision are improved, but the noise interference on control signals increases due to increased current flowing through the wiring
Solution Approach 1:
The power supply wiring is divided into multiple segments (first power source wiring and second power source wiring) that are arranged in parallel. This segmentation allows the current to be distributed across multiple paths, reducing the noise interference on control signals while maintaining the high current capability needed for high-speed processing and high-resolution printing.
Solution Approach 2:
The patent transitions from a single-wiring configuration to a multi-dimensional parallel wiring arrangement. By arranging power source wirings and ground wirings in parallel across different spatial dimensions, the patent creates multiple current paths that reduce electromagnetic interference while supporting increased current requirements for higher productivity and resolution.
2Object-affected harmful factors
If the area of conductor pattern is made as large as possible to suppress noise, then noise suppression is improved, but the available area for conductor pattern formation becomes limited
Solution Approach 1:
Instead of requiring a single large conductor pattern area, the patent segments the wiring into multiple parallel paths. This allows noise suppression to be achieved through distributed current flow across multiple smaller wiring areas, rather than concentrating all current through one large area, thus resolving the conflict between noise suppression and available area.
Solution Approach 2:
The patent combines multiple parallel wiring paths to achieve the noise suppression effect of a large conductor area without actually requiring a single large area. The parallel arrangement of power source wirings and ground wirings creates a combined electromagnetic shielding effect that equals or exceeds what a single large conductor would provide, while utilizing the available area more efficiently.
3Productivity
If the number of liquid ejecting elements is increased, then productivity is improved, but the amount of current flowing through the wiring increases causing more noise interference
Solution Approach 1:
The patent segments the power supply into multiple parallel wiring paths (first power source wiring and second power source wiring). This segmentation allows the total current required for high-productivity operation with multiple liquid ejecting elements to be distributed across parallel paths, reducing the current density in each path and thereby reducing the electromagnetic noise generated.
Solution Approach 2:
The patent adds a dimensional aspect to the wiring configuration by arranging power and ground wirings in parallel across multiple spatial dimensions. This multi-dimensional arrangement provides multiple current flow paths that reduce the electromagnetic interference generated by high current, enabling support for increased numbers of liquid ejecting elements without proportionally increasing noise.
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 significantly reduces noise influence on control signals, ensuring stable and accurate liquid ejection operations even with increased numbers of liquid ejecting elements, thereby maintaining print quality and performance.
Implementation Method 1
a power source wiring that connects the power source terminal for drive with the liquid ejecting element substrate, and a ground wiring that connects the ground terminal for drive with the liquid ejecting element substrate are at least partially arranged in parallel
Data Source
AI summary
A liquid ejecting head and a liquid ejecting apparatus are designed so as to suppress the influence of noise on control signals. The liquid ejecting head has a plurality of terminals electrically connected with a contact point provided in the liquid ejecting apparatus, and a liquid ejecting element substrate having a liquid ejecting element formed for ejecting liquid in response to the control signals transmitted from the liquid ejecting apparatus. A power source terminal for drive and a ground terminal for drive, which are provided for driving the liquid ejecting element, are arranged adjacent to each other, and a power source wiring that connects the power source terminal for drive with the liquid ejecting element substrate and a ground wiring that connects the ground terminal for drive with the liquid ejecting element substrate are at least partially arranged in parallel.