Liquid Jet Head Drive Terminal Layout With Dummy Terminal Isolation
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Solution Overview
Problem
Existing liquid jet recording devices face challenges in improving reliability, particularly in the operation of liquid jet heads.
Innovation Solution
A drive device and drive board configuration that includes a plurality of drive terminals divided into groups with a dummy terminal arranged between them, providing a drive signal to a liquid jet head with nozzles, enhancing reliability through improved electrical coupling and signal distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If drive terminals are arranged densely to reduce device size, then area is reduced, but reliability deteriorates due to increased electrical interference and signal instability
Solution Approach 1:
A dummy terminal is introduced as an intermediary element between drive terminal groups. This dummy terminal serves as a mediator that provides a reference potential and improves electrical coupling stability, allowing drive terminals to be arranged more densely without compromising reliability. The dummy terminal acts as a buffer that maintains signal integrity in the compact arrangement.
Solution Approach 2:
The dummy terminal is configured to have a predetermined potential (equipotential reference), which creates a stable electrical environment for surrounding drive terminals. By establishing this equipotential reference point, the system maintains stable electrical coupling and reduces interference, enabling reliable operation even when terminals are closely spaced.
2Reliability
If drive terminals are arranged sparsely to improve electrical coupling, then reliability is improved, but device area increases
Solution Approach 1:
The dummy terminal serves as a compact intermediary that provides the electrical coupling stability benefits of sparse arrangement without requiring large physical spacing. By placing dummy terminals at strategic intervals between drive terminal groups, the system achieves reliable electrical coupling in a compact footprint.
Solution Approach 2:
Instead of uniformly spacing all terminals, the dummy terminals are locally positioned at specific intervals between drive terminal groups where they are most needed for electrical stability. This localized approach provides reliability improvements only where necessary, minimizing the overall area impact.
3Adaptability or versatility
If multiple drive terminal groups are arranged to cover more nozzles, then functionality is improved, but electrical interference between groups increases
Solution Approach 1:
Dummy terminals are positioned between drive terminal groups to act as mediators that reduce electrical interference. These intermediary elements provide isolation and reference potential that prevents harmful electrical interactions between adjacent drive terminal groups, enabling multiple groups to coexist without significant interference.
Solution Approach 2:
The harmful electrical interference between drive terminal groups is extracted and redirected through the dummy terminals. By providing dedicated dummy terminals between groups, the interference energy is channeled through controlled paths rather than causing unwanted coupling between functional groups.
Data Source
AI summary
There are provided a drive device and so on capable of improving the reliability. A drive device according to an embodiment of the present disclosure is a drive device configured to generate a drive signal to be applied to a liquid jet head having a plurality of nozzles, the drive device including a plurality of drive terminals which is arranged along a longitudinal direction of the drive device, and which is configured to individually output the drive signal for jetting liquid from the nozzles, and at least one dummy terminal configured to electrically be coupled to a predetermined constant potential. The plurality of drive terminals is divided into a plurality of drive terminal groups arranged along the longitudinal direction, and the dummy terminal is arranged at at least one of intervals between the plurality of drive terminal groups.