Liquid Discharge Device Drive Circuit Substrate Waveform Stabilization
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Solution Overview
Problem
Existing liquid discharge devices, such as those using piezoelectric elements, face reduced discharge accuracy due to distorted signal waveforms of drive and reference voltage signals, which are not effectively addressed in current technologies.
Innovation Solution
A liquid discharge device with a drive circuit substrate that includes multiple wiring layers, a first drive circuit with a ground potential, and capacitors (chip and electrolytic) to improve the accuracy of drive signals and reference voltage signals supplied to a piezoelectric element, enhancing the discharge accuracy by stabilizing the potential difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal waveforms are distorted, then discharge accuracy is reduced, but adding waveform correction components increases device complexity
Solution Approach 1:
The patent embeds multiple capacitors (first capacitor on the first surface, second capacitor on the second surface) within the drive circuit substrate structure. This nested arrangement allows waveform correction functionality to be integrated into the existing substrate without significantly increasing overall device complexity, while effectively improving signal waveform accuracy and discharge precision.
Solution Approach 2:
The patent utilizes the third dimension by placing capacitors on both the first surface and second surface of the drive circuit substrate. This spatial arrangement in multiple dimensions allows for effective waveform correction without increasing the planar footprint, thus improving discharge accuracy without proportionally increasing device complexity.
2Manufacturing precision
If waveform accuracy is improved using multiple capacitors, then discharge precision is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the waveform correction function into multiple discrete capacitors (first capacitor and second capacitor) positioned at different locations and orientations on the substrate. This segmentation allows each capacitor to be independently positioned and connected to specific signal lines, enabling precise control over waveform correction for different signal paths without requiring complex integrated circuit manufacturing.
Solution Approach 2:
The patent applies different capacitor types and positions tailored to specific signal lines requiring correction. The first capacitor is connected to the drive signal line while the second capacitor is connected to the reference voltage signal line, with each capacitor's characteristics and positioning optimized for its specific signal's waveform requirements, thereby improving manufacturing precision through localized optimization.
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
The solution improves the discharge accuracy and stability of the liquid discharge device by refining the waveform accuracy of drive signals and the reference voltage, leading to more precise ink dispensing in devices like inkjet printers.
Implementation Method 1
a piezoelectric element driven by a first drive signal supplied to a first electrode and a reference voltage signal supplied to a second electrode and discharges a liquid by driving the piezoelectric element
Implementation Method 2
a first capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end, and a second capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end
Data Source
AI summary
A liquid discharge device in which a drive circuit substrate that outputs a first drive signal supplied to a first electrode, a substrate, a first drive circuit that has a first circuit element in which a ground potential is supplied to one end and outputs the first drive signal, a first capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end, and a second capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end, the substrate includes a first surface and a second surface, the first capacitor is a chip capacitor, the second capacitor is an electrolytic capacitor, the first circuit element and the first capacitor are provided on the first surface, and the second capacitor is provided on the second surface.