Printhead integrated circuit having sensing and test circuitry

Details Printhead integrated circuit having sensing and test circuitry Printhead integrated circuit having sensing and test circuitry

2011-04-05

2011-04-05

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S017000, C347S019000

Reexamination Certificate

active

07918524

ABSTRACT:
A printhead IC is provided having ejection nozzles, drive circuitry for sending drive pulses to resistive heaters of the nozzles to cause ejection from the nozzles, sensing circuitry being activated to sense the temperature of the printhead IC and adjust the profile of the sent drive pulses in accordance with the sensed temperature and being de-activated after a period of use, and test circuitry for selectively disabling the resistive heaters when they receive the drive pulses while comparing the resistance of the resistive heaters against a predetermined threshold to assess whether the resistive heaters are defective.

REFERENCES:
patent: 5774137 (1998-06-01), Yoshida
patent: 6062666 (2000-05-01), Omata et al.
patent: 6120125 (2000-09-01), Kim
patent: 6227641 (2001-05-01), Nishikori et al.
patent: 6315388 (2001-11-01), Goh
patent: 6375299 (2002-04-01), Foster et al.
patent: 6547359 (2003-04-01), Fukano
patent: 6769755 (2004-08-01), Mizutani et al.
patent: 6820955 (2004-11-01), Usui
patent: 7001007 (2006-02-01), Silverbrook
patent: 7207642 (2007-04-01), Usui
patent: 7384128 (2008-06-01), Sheahan et al.
patent: 7419250 (2008-09-01), Silverbrook
patent: 7425048 (2008-09-01), Sheahan et al.
patent: 2003/0202085 (2003-10-01), Rother
patent: 2005/0088474 (2005-04-01), Juve et al.
patent: 0174751 (1988-11-01), None
patent: WO 99/08875 (1999-02-01), None

Affiliated with

Also associated with

Rating

Printhead integrated circuit having sensing and test circuitry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Printhead integrated circuit having sensing and test circuitry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printhead integrated circuit having sensing and test circuitry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2657874