公开(公告)号：US20210221134A1

公开(公告)日：2021-07-22

申请号：US16768066

申请日：2019-02-06

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

Inventor： James Michael GARDNER ,  Scott A. LINN ,  George H. CORRIGAN

IPC: B41J2/14 ,  B41J2/045 ,  B41J2/175

Abstract: An integrated circuit to drive a plurality of fluid actuation devices includes a contact pad and a programmable pulldown device. The programmable pulldown device is electrically coupled to the contact pad. The programmable pulldown device is settable to any one of a plurality of resistances.

公开(公告)号：US20210221128A1

公开(公告)日：2021-07-22

申请号：US16772522

申请日：2019-02-06

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

Inventor： James M. GARDNER ,  George H. CORRIGAN ,  Scott A. LINN

IPC: B41J2/045

Abstract: An integrated circuit to drive a plurality of fluid actuators is disclosed. The integrated circuit analog delay circuits coupled in series and to a fire input to receive a fire signal in succession. Each analog delay circuit receives the fire signal and, after a delay, provides the fire signal via an output to a corresponding fluid actuator. A bias circuit is coupled to each of the of analog delay circuits. The bias circuit provides a bias signal to control the delay.

公开(公告)号：US20180221870A1

公开(公告)日：2018-08-09

申请号：US15748877

申请日：2016-01-22

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

Inventor： Chantelle E. DOMINGUE ,  Manish GIRI ,  Matthew David SMITH ,  Joshua M. YU ,  Jeremy SELLS ,  George H. CORRIGAN

IPC: B01L3/00 ,  G01N15/10 ,  G01N15/12

CPC classification number: B01L3/50273 ,  B01L3/502753 ,  B01L2300/0636 ,  B01L2300/0816 ,  B01L2300/1827 ,  B01L2400/0442 ,  G01N15/1031 ,  G01N15/1056 ,  G01N15/12 ,  G01N2015/1006

Abstract: An apparatus includes a microfluidic passage, a chamber, an inlet connecting the microfluidic passage to the chamber, a sensor proximate the inlet to sense fluid within the inlet, a first nozzle, a first fluid driver to move fluid through the first nozzle to draw fluid across the inlet, a second nozzle, a second fluid driver to move fluid through the second nozzle to draw fluid across the inlet and a controller. The controller sequentially actuates the first fluid driver and the second fluid driver.