# US 2021/0276331 A1 · Fluid ejection devices with indicators

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0276331 A1
- Document ID: US20210276331A1
- Status: Published application
- Kind: A1
- Application number: 16/612,821
- Filed: 2017-07-11
- Published: 2021-09-09
- Earliest claimed: 2017-07-11
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Hewlett-Packard Development Company, L.P.
- Inventors: Daryl E Anderson; James R Przybyla
- Web page: https://patentgrep.com/patent/US20210276331A1

## CPC

- B41J 2/165: Prevention {or detection} of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J 3/46: Printing mechanisms combined with apparatus providing a visual indication
- B41J 25/34: Bodily-changeable print heads or carriages
- B41J 29/393: Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns}
- G06F 3/1229: {Printer resources management or printer maintenance, e.g. device status, power levels}
- B41J 2/16585: {for paper-width or non-reciprocating print heads}
- B41J 2002/1657: {Cleaning of only nozzles or print head parts being selected}
- B41J 2202/20: Modules
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

One example of a fluid ejection system includes a plurality of fluid ejection devices, a corresponding plurality of indicators, an operator interface, and a controller. Each indicator is on a corresponding fluid ejection device. The operator interface is to select a fluid ejection device. The controller is to turn on the corresponding indicator for the selected fluid ejection device.

## Claims

### Claim 1

A fluid ejection system comprising:
a plurality of fluid ejection devices;
a corresponding plurality of indicators, each indicator on a corresponding fluid ejection device;
an operator interface to select a fluid ejection device; and
a controller to turn on the corresponding indicator for the selected fluid ejection device.

### Claim 2 (depends on 1)

The fluid ejection system of claim 1, wherein each indicator includes a light emitting diode.

### Claim 3 (depends on 1)

The fluid ejection system of claim 1, wherein the operator interface includes a graphical user interface.

### Claim 4 (depends on 1)

The fluid ejection system of claim 1, wherein each fluid ejection device includes a printhead assembly.

### Claim 5 (depends on 1)

The fluid ejection system of claim 1, wherein the fluid ejection system includes an inkjet printing system.

### Claim 6

A fluid ejection system comprising:
a plurality of fluid ejection devices;
a corresponding plurality of indicators, each indicator proximate a corresponding fluid ejection device;
an operator interface to select a fluid ejection device; and
a controller to turn on the corresponding indicator for the selected fluid ejection device.

### Claim 7 (depends on 6)

The fluid ejection system of claim 6, further comprising:
at least one driver board;
wherein each fluid ejection device is removably electrically coupled to the at least one driver board, and
wherein each indicator is located on the at least one driver board.

### Claim 8 (depends on 6)

The fluid ejection system of claim 6, wherein each indicator includes a light emitting diode.

### Claim 9 (depends on 6)

The fluid ejection system of claim 6, wherein the operator interface includes a graphical user interface.

### Claim 10 (depends on 6)

The fluid ejection system of claim 6, wherein each fluid ejection device includes a printhead assembly.

### Claim 11

A method for maintaining a fluid ejection system, the method comprising:
selecting, via an operator interface, one fluid ejection device of a plurality of fluid ejection devices of the fluid ejection system; and
activating an indicator on or proximate the selected fluid ejection device.

### Claim 12 (depends on 11)

The method of claim 11, wherein activating the indicator comprises turning on a light emitting diode.

### Claim 13 (depends on 11)

The method of claim 11, wherein selecting the one fluid ejection device comprises selecting the one fluid ejection device via a graphical user interface.

### Claim 14 (depends on 11)

The method of claim 11, wherein selecting the one fluid ejection device comprises selecting one printhead assembly of a plurality of printhead assemblies.

### Claim 15 (depends on 11)

The method of claim 11, wherein the fluid ejection system includes an inkjet printing system.