Liquid Jet Head Coupling State Detection Circuit
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Solution Overview
Problem
Liquid jet heads in recording devices face reliability issues due to challenges in accurately detecting the coupling state between components, particularly in preventing oblique insertion states which can lead to electrical coupling failures.
Innovation Solution
Incorporating a detection circuit that utilizes the transmission signal in differential output lines to detect the coupling state, allowing for the determination of normal coupling without additional dedicated terminals, thereby enhancing reliability and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection circuit is added to detect coupling state, then reliability is improved, but device complexity increases
Solution Approach 1:
The differential input line and differential output line are designed to serve dual purposes: transmitting data signals during normal operation and serving as detection paths for coupling state verification. By making the transmission lines multi-functional, the patent enables reliability detection without adding separate dedicated detection terminals or circuits, thus improving reliability while avoiding increased device complexity.
2Measurement precision
If dedicated detection terminals are added, then coupling state detection accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent reuses existing differential transmission lines for both data communication and coupling detection purposes. This eliminates the need for additional dedicated detection terminals, maintaining detection accuracy through the use of existing high-precision transmission paths while significantly reducing manufacturing costs by avoiding extra components and assembly steps.
Solution Approach 2:
The system performs self-diagnosis by using its own transmission lines to detect coupling states. The detection circuit leverages the existing signal paths to verify proper connection, enabling the system to monitor its own health without requiring external dedicated detection infrastructure, thereby reducing manufacturing complexity and cost.
3Reliability
If oblique insertion prevention is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the detection circuit continuously monitors the coupling state through the differential transmission lines. When oblique or improper insertion is detected, the system can identify the abnormal coupling state and trigger appropriate responses, providing real-time feedback on connection integrity without requiring complex mechanical prevention structures.
Data Source
AI summary
There are provided a liquid jet head and so on capable of enhancing the reliability. A liquid jet head according to an embodiment of the present disclosure includes a jet section configured to jet liquid, at least one drive circuit configured to output a drive signal used to jet the liquid to the jet section, a differential input line configured to transmit data from an outside of the liquid jet head toward the drive circuit, a differential output line configured to transmit data from the drive circuit toward the outside of the liquid jet head, a coupling part which is arranged between the outside of the liquid jet head and the drive circuit, and to which the differential input line and the differential output line are individually coupled, and a detection circuit configured to perform detection of a coupling state in the coupling part using a transmission signal in at least one of the differential output line and the differential input line.