Liquid Ejecting Apparatus Signal Determination for Piezoelectric Variations
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Solution Overview
Problem
Existing liquid ejecting apparatuses struggle to accurately determine the supply signal for piezoelectric bodies due to variations in deformation caused by manufacturing errors, temperature, and other factors, leading to inconsistent liquid ejection.
Innovation Solution
A determination method that acquires information on liquid ejection characteristics when different constant potential signals are supplied to the piezoelectric body, allowing for the determination of an optimal supply signal based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the supply signal is determined based on the number of times the piezoelectric body is driven, then the device complexity is reduced, but the manufacturing precision and reliability of liquid ejection deteriorate due to variations in deformation caused by manufacturing errors and temperature
Solution Approach 1:
The patent changes the parameter used for supply signal determination from simple drive count to actual ejection amount measurements taken at multiple different constant potential signals. By measuring liquid ejection characteristics at multiple potential values and determining the supply signal based on these measurements, the system adapts to variations in piezoelectric body deformation caused by manufacturing errors and temperature, thereby improving liquid ejection consistency without excessive complexity increase
Solution Approach 2:
The patent implements a feedback mechanism where the actual liquid ejection amount is measured and used to determine the supply signal. By acquiring information on liquid ejection characteristics at multiple constant potential signals and using this feedback to adjust the supply signal, the system compensates for deformation variations and maintains consistent ejection performance
2Manufacturing precision
If multiple measurements at different constant potential signals are acquired to determine the supply signal, then the manufacturing precision and reliability of liquid ejection are improved, but the measurement precision and time required for signal determination increase
Solution Approach 1:
The patent measures liquid ejection characteristics at multiple different constant potential signals to capture the relationship between potential and ejection amount. By acquiring measurements at multiple potential values and analyzing this data to determine the optimal supply signal, the system achieves high measurement precision that accounts for deformation variations, thereby improving liquid ejection consistency
Solution Approach 2:
The patent performs measurements at multiple constant potential signals, which is more than a single measurement would provide. This excessive measurement approach ensures that sufficient data is collected to accurately determine the supply signal despite variations in piezoelectric body characteristics, thereby improving measurement precision and ejection consistency
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 method enables the precise adjustment of the supply signal to maintain consistent liquid ejection characteristics, improving the overall performance of the liquid ejecting apparatus.
Implementation Method 1
a piezoelectric body that changes pressure applied to the liquid in the pressure chamber
Data Source
AI summary
A determination method of determining a supply signal to be supplied to a first electrode and a second electrode includes an acquisition step of acquiring, when a predetermined condition is satisfied, first information regarding a liquid ejection characteristic when a first constant potential signal of a first potential is supplied to the second electrode, and second information regarding a liquid ejection characteristic when a second constant potential signal of a second potential different from the first potential is supplied to the second electrode, and a determination step of determining, based on the first information and the second information, the supply signal to be supplied to the first electrode and the second electrode after the predetermined condition is satisfied.