公开(公告)号：US09849672B2

公开(公告)日：2017-12-26

申请号：US15127548

申请日：2014-04-03

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

Inventor： Ning Ge ,  Hang-Ru Goy ,  Boon Bing Ng ,  Shane O'Brien ,  Mun Hooi Yaow

IPC: B41J2/14 ,  B41J2/16 ,  B41J2/045

CPC classification number: B41J2/14112 ,  B41J2/04533 ,  B41J2/14056 ,  B41J2/14129 ,  B41J2/1601 ,  B41J2/1632 ,  B41J2202/13

Abstract: An example provides a fluid ejection apparatus including a first firing resistor and a second firing resistor to selectively cause fluid to be ejected through a single nozzle, and a parasitic resistor arranged to add a parasitic resistance to the first firing resistor.

公开(公告)号：US20170232743A1

公开(公告)日：2017-08-17

申请号：US15519310

申请日：2014-10-29

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

Inventor： Boon Bing Ng ,  Hang Ru Goy ,  Patrick Leonard ,  Shane O'Brien

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14072 ,  B41J2/14153 ,  B41J2/1601 ,  B41J2/164 ,  B41J2/175 ,  B41J2202/18

Abstract: A fluid ejection device including a printhead die having a plurality of layers, including a single metal layer, and having an integrated ink level sensor. The ink level sensor includes an ink chamber above the metal layer, a metal plate of a sense capacitor disposed in the metal layer, and a clearing resistor circuit disposed in the metal layer including four clearing resistors arranged in a surround-4 configuration about the metal plate and electrically connected in parallel between a voltage potential and ground, wherein adjacent ends of at least two clearing resistors are not directly connected to one another so as to leave a gap between the adjacent ends in the metal layer. A metal lead in the metal layer extends through the gap to the metal plate.

公开(公告)号：US10155379B2

公开(公告)日：2018-12-18

申请号：US15519310

申请日：2014-10-29

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

Inventor： Boon Bing Ng ,  Hang Ru Goy ,  Patrick Leonard ,  Shane O'Brien

IPC: B41J2/14 ,  B41J2/175 ,  B41J2/16

Abstract: A fluid ejection device including a printhead die having a plurality of layers, including a single metal layer, and having an integrated ink level sensor. The ink level sensor includes an ink chamber above the metal layer, a metal plate of a sense capacitor disposed in the metal layer, and a clearing resistor circuit disposed in the metal layer including four clearing resistors arranged in a surround-4 configuration about the metal plate and electrically connected in parallel between a voltage potential and ground, wherein adjacent ends of at least two clearing resistors are not directly connected to one another so as to leave a gap between the adjacent ends in the metal layer. A metal lead in the metal layer extends through the gap to the metal plate.

公开(公告)号：US20170151783A1

公开(公告)日：2017-06-01

申请号：US15127548

申请日：2014-04-03

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

Inventor： Ning GE ,  Hang-Ru GOY ,  Boon Bing NG ,  Shane O'Brien ,  Mun Hooi Yaow

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14112 ,  B41J2/04533 ,  B41J2/14056 ,  B41J2/14129 ,  B41J2/1601 ,  B41J2/1632 ,  B41J2202/13

Abstract: An example provides a fluid ejection apparatus including a first firing resistor and a second firing resistor to selectively cause fluid to be ejected through a single nozzle, and a parasitic resistor arranged to add a parasitic resistance to the first firing resistor.