Liquid Ejecting Device Inspection via Synthesized Signal Detection
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Solution Overview
Problem
Existing techniques for inspecting ejectors in liquid ejecting devices, such as inkjet printers, are inefficient due to a lack of consideration for improving process efficiency based on the state of liquids within cavities, particularly regarding residual vibration.
Innovation Solution
A liquid ejecting device with a common electrical path connected to multiple driving elements and a detector that synthesizes electrical signals from these elements to improve inspection efficiency, allowing for collective inspection of ejectors based on a synthesized signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual inspection of each ejector is performed based on residual vibration, then measurement precision can be maintained, but productivity is reduced due to time-consuming sequential inspection
Solution Approach 1:
The patent combines multiple ejector inspections into a single synthesized signal detection process. By electrically connecting multiple driving elements in series and detecting their combined residual vibration signals simultaneously, the system achieves both high inspection accuracy and improved productivity, resolving the contradiction between individual inspection precision and batch inspection speed.
Solution Approach 2:
The detection system is designed to universally inspect multiple ejectors using a single detector and common electrical path. This multi-functional approach allows the same detection mechanism to evaluate several ejectors simultaneously, maintaining measurement precision while significantly increasing inspection throughput.
2Productivity
If multiple ejectors are inspected simultaneously using a common electrical path, then productivity is improved, but device complexity increases due to additional electrical connections and signal synthesis requirements
Solution Approach 1:
The patent merges multiple driving elements into a single series electrical circuit, allowing simultaneous inspection through a common detection path. This consolidation reduces the number of separate electrical connections and detectors needed, improving productivity while actually simplifying the overall electrical architecture despite the multi-ejector configuration.
3Measurement precision
If strong drive signals are applied to detect electrical signals from multiple driving elements, then detection sensitivity is improved, but harmful factors increase due to potential damage to driving elements
Solution Approach 1:
The patent applies drive signals periodically to multiple driving elements in sequence through the common electrical path. By controlling the timing and duration of each drive signal application, the system achieves sufficient detection sensitivity while preventing excessive energy accumulation that could damage the driving elements, thus resolving the contradiction between detection sensitivity and element safety.
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 approach enhances inspection speed and efficiency by enabling the simultaneous detection of electrical signals from multiple ejectors, reducing the likelihood of erroneous decisions and minimizing the impact of residual vibration on inspection results.
Implementation Method 1
a detector electrically connected to the common electrical path; wherein the detector detects, via the common electrical path, electrical signals output from each of the plurality of driving elements
Data Source
AI summary
A liquid ejecting device ejects a liquid using a driving element driven through application of a drive signal. The liquid ejecting device comprises a detector electrically connected to a plurality of driving elements via a common electrical path. The detector detects electrical signals output from each of the plurality of driving elements.