# US 10,864,744 B2 · Liquid ejecting apparatus and control method of liquid ejecting apparatus

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- Number: US 10,864,744 B2
- Document ID: US10864744B2
- Status: Granted
- Kind: B2
- Application number: 16/450,345
- Filed: 2019-06-24
- Published: 2020-01-02
- Granted: 2020-12-15
- Earliest claimed: 2018-06-27
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Takeo Seino
- Web page: https://patentgrep.com/patent/US10864744B2

## CPC

- B41J 2/17566: {Ink level or ink residue control}
- B41J 2/04535: {involving calculation of drop size, weight or volume}
- B41J 2/1652: {by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head}
- B41J 2/175: Ink supply systems {; Circuit parts therefor}
- B41J 2/195: for monitoring ink quality
- B41J 2002/17569: {based on the amount printed or to be printed}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A liquid ejecting apparatus includes: a liquid ejecting head configured to eject liquid contained in a liquid container; a display portion configured to display information; a remaining amount detection portion configured to detect that a remaining amount of the liquid contained in the liquid container becomes less than a threshold value; and a control portion configured to control display of the display portion, in which the control portion causes the display portion to display a calculation remaining amount calculated based on an initial amount of storage of the liquid contained in the liquid container, a total discharge amount of the liquid discharged from the liquid ejecting head, and a correction amount corresponding to a use environment.

## Claims

### Claim 1

A liquid ejecting apparatus comprising:
a liquid ejecting head configured to eject liquid contained in a liquid container;
a display portion configured to display information;
a remaining amount detection portion configured to detect that a remaining amount of the liquid contained in the liquid container becomes less than a threshold value; and
a control portion configured to control display of the display portion, wherein
the control portion causes the display portion to display a calculation remaining amount calculated based on an initial amount of storage of the liquid contained in the liquid container, a total discharge amount of the liquid discharged from the liquid ejecting head, and a correction amount corresponding to a use environment,
the control portion changes an amount of change of the calculation remaining amount per unit discharge amount in the display portion in accordance with the use environment, and
when the control portion cannot obtain a temperature of the use environment, the control portion calculates the amount of change of the calculation remaining amount based on an assumed minimum temperature.

### Claim 2 (depends on 1)

The liquid ejecting apparatus according to claim 1, wherein
the correction amount corresponds to atmospheric pressure of the use environment.

### Claim 3 (depends on 2)

The liquid ejecting apparatus according to claim 2, wherein
the control portion further reduces an amount of change of the calculation remaining amount per unit discharge amount in the display portion as the atmospheric pressure becomes higher.

### Claim 4 (depends on 1)

The liquid ejecting apparatus according to claim 1, wherein
the correction amount corresponds to temperature of the use environment.

### Claim 5 (depends on 4)

The liquid ejecting apparatus according to claim 4, wherein
the control portion further reduces an amount of change of the calculation remaining amount per unit discharge amount in the display portion as the temperature becomes higher.

### Claim 6 (depends on 2)

The liquid ejecting apparatus according to claim 2, wherein
the control portion changes the amount of change of the calculation remaining amount per unit discharge amount in the display portion in accordance with the use environment when power is turned on.

### Claim 7 (depends on 2)

The liquid ejecting apparatus according to claim 2, wherein
the control portion changes the amount of change of the calculation remaining amount per unit discharge amount in the display portion in accordance with the use environment every time a predetermined time period elapses in a power-on state.

### Claim 8 (depends on 1)

The liquid ejecting apparatus according to claim 1, wherein when the control portion cannot obtain an atmospheric pressure of the use environment, the control portion calculates the amount of change and the calculation remaining amount based on an assumed minimum atmospheric pressure.

### Claim 9

A liquid ejecting apparatus comprising:
a liquid ejecting head configured to eject liquid contained in a liquid container;
a display portion configured to display information;
a remaining amount detection portion configured to detect that a remaining amount of the liquid contained in the liquid container becomes less than a threshold value; and
a control portion configured to control display of the display portion, wherein
the control portion causes the display portion to display a calculation remaining amount calculated based on an initial amount of storage of the liquid contained in the liquid container, a total discharge amount of the liquid discharged from the liquid ejecting head, and a correction amount corresponding to a use environment,
wherein the calculation remaining amount satisfies the expression:
(an initial amount of storage of the liquid contained in the liquid container−a total discharge amount of the liquid discharged from the liquid ejecting head)×(an amount of change of the calculation remaining amount per unit discharge amount) (1), and
the amount of change of the calculation remaining amount per unit discharge amount satisfies the expression:
(a unit discharge amount)/(a reference amount+the correction amount)×100 (2),
where the reference amount is based on (the initial amount of storage of the liquid)−(a maximum unusable amount of liquid).