公开(公告)号：US10421273B2

公开(公告)日：2019-09-24

申请号：US16161399

申请日：2018-10-16

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Andrew L. Van Brocklin ,  Mark Hunter ,  Peter James Fricke ,  Adam L. Ghozeil ,  James Michael Gardner

IPC: B41J2/045 ,  B41J2/195

Abstract: In some examples, a method of regulating a temperature of a printhead includes charging, in a first state of a temperature regulator, an analog memory to a reference voltage that corresponds to a predetermined temperature of the printhead. The temperature regulator monitors, during a second state, the temperature of the printhead, the monitoring including measuring a thermal voltage representing an actual temperature of at least a first local area of a plurality of local areas of the printhead, and comparing, with a comparator, the reference voltage to the thermal voltage to obtain a comparison result for at least the first local area. Based on the comparison result, a series of warming pulses from a warming pulse circuit to at least the first local area is selectively enabled.

公开(公告)号：US20190047283A1

公开(公告)日：2019-02-14

申请号：US16161399

申请日：2018-10-16

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Andrew L. Van Brocklin ,  Mark Hunter ,  Peter James Fricke ,  Adam L. Ghozeil ,  James Michael Gardner

IPC: B41J2/045 ,  B41J2/195

CPC classification number: B41J2/04563 ,  B41J2/04528 ,  B41J2/0458 ,  B41J2/04588 ,  B41J2/04596 ,  B41J2/195

Abstract: In some examples, a method of regulating a temperature of a printhead includes charging, in a first state of a temperature regulator, an analog memory to a reference voltage that corresponds to a predetermined temperature of the printhead. The temperature regulator monitors, during a second state, the temperature of the printhead, the monitoring including measuring a thermal voltage representing an actual temperature of at least a first local area of a plurality of local areas of the printhead, and comparing, with a comparator, the reference voltage to the thermal voltage to obtain a comparison result for at least the first local area. Based on the comparison result, a series of warming pulses from a warming pulse circuit to at least the first local area is selectively enabled.