Inkjet Recording Device Independent Nozzle Row Voltage Control
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Solution Overview
Problem
Existing inkjet printers require preliminary measurement and determination of discharge characteristics for all heads to ensure uniform ink discharge, which is time-consuming and inefficient, and previous methods need to adjust drive signals for each nozzle to account for manufacturing variations, complicating the recording process.
Innovation Solution
A recording device with two nozzle rows, one driven at a first voltage and the other at a second voltage, allows for user-input selection based on comparisons between images printed by each row, enabling independent voltage control to correct for discharge variations without prior measurement, using a driving circuit and input unit to adjust voltages accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If preliminary measurement and determination of discharge characteristics is performed for all heads, then uniform ink discharge is achieved, but the recording process becomes time-consuming and inefficient
Solution Approach 1:
The invention divides the inkjet head into multiple independent nozzle rows, each capable of being driven at different voltages. This segmentation allows individual adjustment of each nozzle row without affecting others, enabling quick correction of discharge variations without comprehensive measurement of all nozzles.
Solution Approach 2:
The invention changes the drive voltage parameter for different nozzle rows to compensate for discharge variations. By adjusting the voltage applied to each nozzle row independently, the system corrects discharge characteristics without requiring time-consuming measurement and physical adjustment of each nozzle.
2Manufacturing precision
If drive signals are adjusted for each nozzle to account for manufacturing variations, then discharge consistency is improved, but the recording process becomes complicated
Solution Approach 1:
The invention merges the control of multiple nozzles into nozzle rows, where each row can be controlled by a single voltage level. This reduces the complexity from adjusting each individual nozzle to adjusting entire rows simultaneously, simplifying the control system while maintaining discharge consistency.
Solution Approach 2:
Each nozzle row is designed to function as a universal unit that can be independently adjusted. The driving circuit can apply different voltages to different rows, making the system versatile in handling various discharge patterns without requiring complex individual nozzle control.
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 allows for real-time correction of discharge variations between nozzle rows, eliminating the need for preliminary measurements and ensuring consistent ink discharge without requiring specific voltage values, thus improving printing efficiency and quality.
Implementation Method 1
a driving circuit that drives the first nozzle row at a first voltage and drives the second nozzle row at a second voltage
Data Source
AI summary
A recording device includes a head including a plurality of nozzles discharging ink droplets and a head including a plurality of nozzles discharging ink droplets of a color identical to that of the ink droplets, a driving circuit configured to drive the former head at a drive voltage and drive the latter head by another drive voltage, an input unit configured to receive an input of selection information selected, based on comparison between a print image printed by the former head and a plurality of other print images G2 printed by the latter head, with the other drive voltage being changed individually, and a control unit configured to control the drive voltage and the other drive voltage, based on the selection information input from the input unit.