Liquid ejection device

By employing a multi-ejection section and drive circuit design in the liquid ejection device, and utilizing state determination and switching circuit control, the problems of decreased ejection characteristics and image quality caused by abnormal piezoelectric elements are solved, achieving a more stable and higher quality liquid ejection effect.

CN122275447APending Publication Date: 2026-06-26SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2025-12-22
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing liquid ejection devices, malfunctions of piezoelectric elements can lead to a decrease in liquid ejection characteristics and a reduction in image quality. Furthermore, existing technologies cannot completely suppress the possibility of piezoelectric element malfunctions, affecting the convenience of the device.

Method used

The design employs multiple ejector sections and drive circuits. An abnormal ejector section is detected by a status determination circuit. The impedance switching of the drive signal and the reference voltage signal is controlled by a switching circuit to ensure the transmission of the drive signal and the reference voltage signal during normal ejection and to avoid driving abnormal ejector sections.

Benefits of technology

It improves the stability and image quality of the liquid ejection device, reduces damage under abnormal conditions, and enhances the convenience of the device and the quality of image formation.

✦ Generated by Eureka AI based on patent content.

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Abstract

A liquid ejection device reduces the possibility of image quality degradation and inconvenience impairment caused by the medium. In this device, if a state determination circuit determining the state of multiple ejection sections determines that a first ejection section has malfunctioned, during the ejection period of liquid ejection from the printhead, a first switching circuit corresponding to a first piezoelectric element that causes the first ejection section to eject liquid does not supply a drive signal to the first piezoelectric element. Similarly, if the state determination circuit determining the state of multiple ejection sections determines that a second ejection section has malfunctioned, during the ejection period, a second switching circuit corresponding to a second piezoelectric element that causes the second ejection section to eject liquid does not supply a drive signal to the second piezoelectric element.
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