Patent · US Active

Inkjet printhead integrated circuit

US7658459B2 · kind B2 · utility

7Cited by

4References

8Claims

0Family size

Assignee

Silverbrook Research Pty Ltd · AU

Inventors

John Robert Sheahan · Sydney, AU
Mark Jackson Pulver · Sydney, AU
Brian Christopher Morahan · Sydney, AU
Alireza Moini · Sydney, AU
Timothy Peter Gillespie · Sydney, AU
Michael John Webb · Sydney, AU
Kia Silverbrook · Sydney, AU

Key dates

Filing date	Jul 22, 2008
Grant date	Feb 9, 2010
Priority date	—
Expiry date	Jul 22, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J2202/20
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A printhead IC is provided which has an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output and open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective. During use, the temperature sensor can be de-activated after a period of use.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.