公开(公告)号：US10775725B2

公开(公告)日：2020-09-15

申请号：US16481368

申请日：2017-03-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Mark Hirst

IPC: G03G15/20 ,  G03G15/00

Abstract: Controlling power delivered to a heating device occurs using a phase control, wherein the phase control includes changing a cut-off phase of an alternating current electrical signal delivered to the heating device. The power delivered to the heating device is increased from zero to an operational level using the phase control. The level of the power delivered to the heating device is maintained at the operational level using both the phase control and an integral half cycle control. The integral half cycle includes selectively removing a plurality of half cycles from the alternating current electrical signal delivered to the heating device.

公开(公告)号：US11614758B2

公开(公告)日：2023-03-28

申请号：US16944444

申请日：2020-07-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Mark Hirst

IPC: G05F1/455 ,  G03G15/00 ,  H05B1/02 ,  B41J2/475 ,  H03K5/156 ,  G05F5/00 ,  H02M1/12 ,  H02M5/257 ,  H02M5/27 ,  G03G15/20

Abstract: Power to an electrical device is controlled using a phase control that changes a cutoff phase of an alternating current (AC) electrical signal delivered to the electrical device. The power delivered to the electrical device is increased to an operational level using the phase control. A level of the power delivered to the electrical device is maintained at the operational level using an integral half cycle control that selectively removes a plurality of half cycles from the AC electrical signal delivered to the electrical device such that a plurality of remaining half cycles in the AC electrical signal delivered to the electrical device have a frequency outside a range of sub-harmonic frequencies.

公开(公告)号：US10534284B2

公开(公告)日：2020-01-14

申请号：US15570991

申请日：2015-07-30

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

Inventor： Mark Hirst ,  Brad Larson ,  Mark Shaw

IPC: G03G15/04 ,  G03G15/043 ,  G03G15/045

Abstract: An electrophotographic imager includes a photoconductive element, a charger, and a light source to expose areas of a charged surface of the photoconductive element to form a latent image. A development element is coupled relative to the photoconductive element to develop, via charged marking agent, the latent image on the photoconductive element. An exposure adjustment factor is selectively applied, prior to the exposing, to a first printable area of the latent image.

公开(公告)号：US11106270B2

公开(公告)日：2021-08-31

申请号：US16462725

申请日：2017-01-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Brian C Mayer ,  Mark Hirst

IPC: G06F1/32 ,  G06F1/3234 ,  H04N1/00 ,  G06F1/3209 ,  G06F1/3228 ,  G06F1/3206 ,  G06F1/3293 ,  G06F1/3215 ,  G06F1/329 ,  G06F1/3287

Abstract: In one example, a printer with parallel/serial operational sequencing includes an engine control unit and an image processor unit each coupled to a set of sub-systems. A network unit is coupled to the image processor unit to monitor network packets while the engine control unit, the set of sub-systems, and the image processor unit are in sleep states. When a first predetermined packet is received, the network unit signals with a first modulation signal that the image processor unit is to awaken first before the image processor unit determines whether to awaken the engine control unit and any of the set of sub-systems. When a second predetermined packet is received, the network unit signals with a second modulation signal that the image processor unit, the engine control unit, and a portion of the set of sub-systems are to awaken at the same time.

公开(公告)号：US20190391512A1

公开(公告)日：2019-12-26

申请号：US16481368

申请日：2017-03-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Mark Hirst

IPC: G03G15/20 ,  G03G15/00

Abstract: Controlling power delivered to a heating device occurs using a phase control, wherein the phase control includes changing a cut-off phase of an alternating current electrical signal delivered to the heating device. The power delivered to the heating device is increased from zero to an operational level using the phase control. The level of the power delivered to the heating device is maintained at the operational level using both the phase control and an integral half cycle control. The integral half cycle includes selectively removing a plurality of half cycles from the alternating current electrical signal delivered to the heating device.

公开(公告)号：US20180364606A1

公开(公告)日：2018-12-20

申请号：US15570991

申请日：2015-07-30

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

Inventor： Mark Hirst ,  Brad Larson ,  Mark Shaw

IPC: G03G15/043 ,  G03G15/045 ,  G03G15/04

CPC classification number: G03G15/043 ,  G03G15/04045 ,  G03G15/045 ,  G03G2215/0402

Abstract: An electrophotographic imager includes a photoconductive element, a charger, and a light source to expose areas of a charged surface of the photoconductive element to form a latent image. A development element is coupled relative to the photoconductive element to develop, via charged marking agent, the latent image on the photoconductive element. An exposure adjustment factor is selectively applied, prior to the exposing, to a first printable area of the latent image.