Liquid Jet Drive Board Grounding Layout for Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid jet recording devices face challenges in improving reliability due to issues with noise interference and grounding stability in high-speed digital circuits, particularly in liquid jet heads with increased control terminals.
Innovation Solution
The implementation of a drive board design that includes a digital ground wiring line electrically coupled in common to digital ground terminals at two or more places, along with a double-sided flexible board structure and specific grounding configurations, enhances grounding stability and reduces noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of control terminals is increased to enhance functionality, then the device capabilities are improved, but noise interference and grounding stability deteriorate
Solution Approach 1:
The drive board is divided into multiple grounding regions with separate grounding terminals (first grounding terminal, second grounding terminal, third grounding terminal) distributed across different areas. This segmentation allows each region to be grounded independently, preventing noise from one region affecting others while maintaining overall grounding stability despite increased control terminals.
Solution Approach 2:
Multiple grounding terminals are provided at different locations on the drive board, all connected to the ground potential. This creates equipotential regions that stabilize the reference potential across the board, ensuring that increased functionality does not compromise grounding stability or introduce noise interference.
2Productivity
If high-speed digital circuits are used to improve productivity, then the processing speed is improved, but noise interference increases
Solution Approach 1:
The harmful noise generated by high-speed digital circuits is extracted and directed to dedicated grounding terminals positioned away from signal paths. The grounding structure separates noise-carrying paths from signal paths, allowing high-speed processing while preventing noise interference with other circuit operations.
Solution Approach 2:
The grounding terminals and grounding paths act as intermediaries that provide a controlled path for noise discharge. By introducing these intermediary grounding elements, high-speed digital circuits can operate at full speed while the grounding structure mediates the noise discharge process to prevent interference with other circuit functions.
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
The drive board according to an embodiment of the present disclosure is a board configured to output a drive signal to be applied to a liquid jet head having a plurality of nozzles, including at least one drive device which is mounted on a board surface of the drive board, which is configured to generate the drive signal for jetting liquid from the nozzles, and which has a plurality of digital ground terminals located at a plurality of places different from each other, and a digital ground wiring line which is arranged in a mounting region of the drive device, and which is electrically coupled commonly to the digital ground terminals at two or more places out of the digital ground terminals at the plurality of places.