Unlock instant, AI-driven research and patent intelligence for your innovation.

Liquid ejection device and drive circuit for capacitive load

A liquid and capacitor technology, applied in printing and other directions

Active Publication Date: 2019-11-22
SEIKO EPSON CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the Class D amplification method has higher energy efficiency than the linear amplification method, but there is room for improvement in terms of power consumption.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid ejection device and drive circuit for capacitive load
  • Liquid ejection device and drive circuit for capacitive load
  • Liquid ejection device and drive circuit for capacitive load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings and by taking a printing device as an example.

[0033] figure 1 It is a perspective view showing a schematic configuration of the printing device 1 .

[0034] The printing apparatus 1 shown in this figure is a kind of liquid ejection apparatus that forms ink dot groups on a medium P such as paper by ejecting ink as an example of a liquid. Images (including text and graphics, etc.) are printed.

[0035] Such as figure 1 As shown, the printing apparatus 1 includes a moving mechanism 6 that moves (reciprocates) the carriage 20 in the main scanning direction (X direction).

[0036] The moving mechanism 6 includes a carriage motor 61 for moving the carriage 20 , a carriage guide shaft 62 fixed at both ends, and a timing belt 63 extending approximately parallel to the carriage guide shaft 62 and driven by the carriage motor 61 .

[0037] The carriage 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present application provides a liquid ejection device and a driving circuit for a capacitive load. Improvement of power consumption in a liquid ejection device. A drive circuit (120a) that outputs a drive signal (COM‑A) from a node (N2) has a function of utilizing ground (Gnd), voltage (V A , V B ) to amplify the signal (ain), the circuit includes a first pair of transistors, a second pair of transistors, a power supply line (290g) of ground (Gnd), is applied with a voltage (V A ) of the power supply line (290a), is applied with a voltage (V B ) supply line (290b), capacitors (Cag, Cba), the first transistor pair between ground (Gnd) and voltage (V A ) to amplify the signal (ain), the second transistor pair is at the voltage (V A ) and voltage (V B ), one end of the capacitor (Cag) is connected to the power supply line (290g), the other end of the capacitor (Cag) is connected to the power supply line (290a), and one end of the capacitor (Cba) is connected to the power supply line (290a) The other end of the capacitor (Cba) is connected to the power supply line (290b).

Description

technical field [0001] The present invention relates to a liquid ejection device and a drive circuit for a capacitive load. Background technique [0002] Among inkjet printers that print images or documents by ejecting ink, there is known a printer that utilizes a piezoelectric element (for example, a piezo element). The piezoelectric element is provided in the head unit corresponding to each of the plurality of nozzles, and is respectively driven according to a driving signal. By this driving, a predetermined amount of ink (liquid) is ejected from the nozzle at a predetermined timing to form dots. Since the piezoelectric element is a capacitive load such as a capacitor electrically, it is necessary to supply a sufficient current to operate the piezoelectric element of each nozzle. [0003] Therefore, in an inkjet printer, an original drive signal that is the source of the drive signal is amplified by an amplifier circuit and supplied to the head unit as a drive signal to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/045
CPCB41J2/04501B41J2/04541B41J2/04548B41J2/04581B41J2/04593B41J2/0455
Inventor 阿部彰
Owner SEIKO EPSON CORP