公开(公告)号：US20210344269A1

公开(公告)日：2021-11-04

申请号：US16607479

申请日：2018-04-30

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

Inventor： Robert G. Mejia ,  Nathan Logan ,  Bartley Mark Hirst

IPC: H02M1/12 ,  H02M7/217 ,  H02M1/44

Abstract: An example system includes a rectifying component to convert an alternating current (AC) signal into a direct current (DC) signal. The system also includes a filtering component. The filtering component determines that a plurality of AC cycle drops have occurred and will deactivate the AC signal in response to that determination. Furthermore, the system includes an isolating component. The isolating component consumes greater than a threshold level of power in one state and less than a threshold level of power in another state. The isolating component is operating in the state that consumes greater than a threshold level of power when the signal that indicates the AC voltage is at a level in which it may allow the device to operate safely and properly is deactivated.

公开(公告)号：US20230185353A1

公开(公告)日：2023-06-15

申请号：US17551461

申请日：2021-12-15

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

Inventor： Robert G. Mejia ,  David Lance Spaulding

IPC: B41J29/38

CPC classification number: B41J29/38

Abstract: A printer, according to an example, includes a sensor circuit to sense a position of an element of the printer, wherein the sensor circuit includes a comparison circuit to compare a sensed signal to a threshold signal and generate an output signal based on the comparison. The printer includes a controller to: repeatedly power on and power off the sensor circuit; receive the output signal of the comparison circuit when the sensor circuit is powered on, thereby receiving a plurality of output signals over time; and adjust the threshold signal based on at least one of the plurality of output signals.

公开(公告)号：US11218071B2

公开(公告)日：2022-01-04

申请号：US16607479

申请日：2018-04-30

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

Inventor： Robert G. Mejia ,  Nathan Logan ,  Bartley Mark Hirst

IPC: H02M1/36 ,  H02M1/32 ,  H02M7/06 ,  H02M1/14

Abstract: An example system includes a rectifying component to convert an alternating current (AC) signal into a direct current (DC) signal. The system also includes a filtering component. The filtering component determines that a plurality of AC cycle drops have occurred and will deactivate the AC signal in response to that determination. Furthermore, the system includes an isolating component. The isolating component consumes greater than a threshold level of power in one state and less than a threshold level of power in another state. The isolating component is operating in the state that consumes greater than a threshold level of power when the signal that indicates the AC voltage is at a level in which it may allow the device to operate safely and properly is deactivated.