# US 8,465,112 B2 · Droplet ejecting apparatus and current control method

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- Number: US 8,465,112 B2
- Document ID: US8465112B2
- Status: Granted
- Kind: B2
- Application number: 13/216,363
- Filed: 2011-08-24
- Published: 2011-12-15
- Granted: 2013-06-18
- Earliest claimed: 2005-08-24
- Assignees: Fuji Xerox Co., Ltd.
- Applicants: Yoshinao Kondoh
- Inventors: Yoshinao Kondoh
- Web page: https://patentgrep.com/patent/US8465112B2

## CPC

- B41J 2/04593: {Dot-size modulation by changing the size of the drop}
- B41J 2/0452: {reducing demand in current or voltage}
- B41J 2/04541: {Specific driving circuit}
- B41J 2/04543: {Block driving}
- B41J 2/04565: {detecting heater resistance}
- B41J 2/0457: {Power supply level being detected or varied}
- B41J 2/04581: {controlling heads based on piezoelectric elements}
- B41J 2/04588: {using a specific waveform}
- B41J 2202/20: Modules
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A droplet ejecting component of the present invention includes an ejecting component having a charge and discharge characteristic, an applying component being provided with a transistor, and an increasing component. The ejecting component ejects a droplet. When a control signal is inputted, the applying component applies an application voltage to the ejecting component, and the increasing component increases the impedance of the transistor.

## Claims

### Claim 1

A droplet ejecting apparatus comprising:
an ejecting component which ejects a droplet, the ejecting component having a charge and discharge characteristic;
an applying component which applies an application voltage to the ejecting component when a control signal is inputted, the applying component being provided with a transistor; and
an increasing component which increases the impedance of the transistor,
wherein the increasing component increases the impedance of the transistor before the ejecting component is driven, and
the increasing component substantially decreases a voltage applied to an output of the transistor.

### Claim 2

A current control method in which passage of current through an ejecting component is controlled in a starting drive of a droplet ejecting apparatus including the ejecting component, an applying component, and an increasing component, wherein
the ejecting component has a charge and discharge characteristic, and the ejecting component ejects a droplet,
the applying component is provided with a transistor,
the applying component applies an application voltage to the ejecting component when a control signal is inputted, and
the increasing component increases the impedance of the transistor,
wherein the increasing component increases the impedance of the transistor before the ejecting component is driven, and
the increasing component substantially decreases a voltage applied to an output of the transistor.