Inkjet Recording Device Nozzle Voltage and Pressure Control
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Solution Overview
Problem
Inkjet recording devices with multiple nozzles face print quality issues due to individual variations in charging voltage, deflecting voltage, and ink pressure, leading to irregularities in ink particle landing positions and print height, particularly affecting continuous and accurate printing of two-dimensional barcodes and logos.
Innovation Solution
An inkjet recording device with a control unit that independently adjusts the charging voltage, deflecting voltage, and ink pressure for each nozzle based on real-time current values and reference settings, ensuring consistency across nozzles through periodic checks and fine adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple nozzles are arranged side by side in a print head to improve printing efficiency, then productivity is improved, but manufacturing precision deteriorates due to individual variations in charging voltage, deflecting voltage, and ink pressure causing irregularities in ink particle landing positions and print height
Solution Approach 1:
The patent applies local quality by independently adjusting print elements (charging voltage, deflecting voltage, ink pressure) for each nozzle based on its individual characteristics. The control unit stores different setting values for each nozzle and selects appropriate values to compensate for individual variations, ensuring each nozzle produces ink particles with consistent landing positions and print height despite manufacturing differences
Solution Approach 2:
The patent changes parameters (charging voltage, deflecting voltage, ink pressure) individually for each nozzle to compensate for individual variations. By adjusting these parameters within a predetermined range based on detected print element values, the system maintains consistent print quality across multiple nozzles while preserving the productivity benefits of having multiple nozzles
2Device complexity
If individual variations in print elements between nozzles are allowed to exist, then device complexity is reduced, but manufacturing precision deteriorates as variations in charging voltage, deflecting voltage, and ink pressure cause visible irregularities in print result
Solution Approach 1:
The system performs self-service by automatically detecting actual print element values for each nozzle and autonomously selecting appropriate setting values from stored data to compensate for individual variations. This automated feedback mechanism maintains print quality consistency without requiring complex manual calibration procedures for each nozzle
Solution Approach 2:
The patent implements feedback by detecting actual values of print elements (charging voltage, deflecting voltage, ink pressure) for each nozzle and using this information to select appropriate setting values. The control unit continuously monitors and adjusts parameters based on detected variations, ensuring consistent print quality while managing device complexity through intelligent control
3Manufacturing precision
If fine adjustment of print elements is performed for each nozzle to improve print quality, then manufacturing precision is improved, but device complexity increases due to the need for independent control of charging voltage, deflecting voltage, and ink pressure for each nozzle
Solution Approach 1:
The system applies preliminary action by pre-storing multiple setting values for each nozzle's print elements (charging voltage, deflecting voltage, ink pressure) in the control unit. When individual variations are detected, the control unit selectively retrieves and applies appropriate pre-prepared setting values, enabling fine adjustment for each nozzle without requiring complex real-time calculation or control mechanisms
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 solution effectively suppresses variance in print quality by ensuring precise control over print elements, maintaining consistent ink particle landing positions and print height, thereby enhancing the accuracy and continuity of printed content.
Implementation Method 1
charging electrodes which apply charging voltages to the ink particles to charge the ink particles
Implementation Method 2
deflecting electrodes which deflect the charged ink particles
Data Source
AI summary
The purpose of the present invention is to suppress variance in the print quality of an inkjet recording device. In order to solve the above problem, the present invention is an inkjet recording device of a charge control type equipped with two or more nozzles which are disposed side by side in a print head, the inkjet recording device being characterized by the following: having a control unit for performing print control independently for each of a plurality of printing configurations; the control unit having an input unit whereby current values of print elements of each of the printing configurations can be periodically checked, and having an output unit whereby the print elements during a subsequent print can be modified; and in that the control unit further adjusts each of the nozzles for every print so as to cause the “charging voltage”, “deflecting voltage”, and “ink pressure” of the subsequent print to approach a reference value.