Liquid dispensing device and liquid dispensing unit
The liquid ejection device stabilizes power supply voltage using a capacitor with a solid electrolyte and liquid substance phase, addressing instability in switching power supply circuits to improve operational stability and image quality.
JP2026096354APending Publication Date: 2026-06-15SEIKO EPSON CORP
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SEIKO EPSON CORP
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-15
AI Technical Summary
Technical Problem
Existing liquid ejection devices using switching power supply circuits face instability issues that need improvement for stable operation.
Method used
A liquid ejection device incorporating a power supply circuit with a switching circuit and a smoothing circuit using a capacitor with a solid electrolyte phase containing a conductive polymer compound and a liquid substance phase to stabilize the power supply voltage.
Benefits of technology
The solution enhances the stability and reliability of the liquid ejection process, ensuring consistent and high-quality image formation on the medium.
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Smart Images
Figure 2026096354000001_ABST
Abstract
To improve the operational stability of the liquid dispensing device. [Solution] A liquid dispensing device comprising: a dispensing unit that dispenses liquid into a medium when a drive signal is supplied; a first switch circuit that switches whether or not to supply a drive signal to the dispensing unit; and a power supply circuit that receives a first power supply voltage signal and outputs a second power supply voltage signal to the first switch circuit, wherein the power supply circuit has a switching circuit that outputs a pulse signal corresponding to the first power supply voltage signal, and a smoothing circuit that includes a capacitor and outputs a second power supply voltage signal obtained by smoothing the pulse signal, wherein the capacitor has an anode foil with an oxide film formed on its surface, a cathode foil, a separator disposed between the anode foil and the cathode foil, and an electrolyte present in the void between the anode foil and the cathode foil excluding the separator, wherein the electrolyte includes a solid electrolyte phase containing a conductive polymer compound and a liquid substance phase surrounding the solid electrolyte phase and containing a liquid substance.
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