公开(公告)号：US20220314608A1

公开(公告)日：2022-10-06

申请号：US17835672

申请日：2022-06-08

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

Inventor： Boon Bing Ng

IPC: B41J2/045 ,  B41J2/175

Abstract: An integrated circuit to drive a plurality of fluid actuation devices includes a fire line, a plurality of memory elements, a first switch, and a plurality of second switches. The first switch is electrically coupled between the fire line and a first side of each memory element of the plurality of memory elements. Each second switch is electrically coupled to a second side of a respective memory element of the plurality of memory elements.

公开(公告)号：US11453212B2

公开(公告)日：2022-09-27

申请号：US16768125

申请日：2019-07-31

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

Inventor： Boon Bing Ng ,  James Michael Gardner

IPC: B41J2/045 ,  G06F3/12 ,  G06F13/16 ,  G11C7/10 ,  G11C16/10 ,  G11C16/26

Abstract: A memory circuit for a print component including a plurality of I/O pads, including an analog pad, to connect to a plurality of signals paths which communicate operating signals to the print component, and a memory component to store memory values associated with the print component. A control circuit to, in response to identifying a sequence of operating signals representing a memory read, provide a first analog signal on the analog pad in parallel with a second analog signal from the print component to provide an analog electrical value on the analog pad representing stored memory values selected by the memory read.

公开(公告)号：US20220176708A1

公开(公告)日：2022-06-09

申请号：US17417789

申请日：2019-08-28

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

Inventor： Boon Bing Ng ,  Anthony M. Fuller ,  Michael W. Cumbie

IPC: B41J2/19 ,  B41J2/14

Abstract: In some examples, a fluid dispensing device includes an inner chamber to contain a fluid. The fluid dispensing device further includes an orifice layer comprising a bubbler orifice to draw air through a bubbler chamber to the inner chamber responsive to a pressure satisfying a criterion, the bubbler chamber being adjacent the bubbler orifice. A circulation path circulates fluid drawn through a feed hole through the bubbler chamber.

公开(公告)号：US11351776B2

公开(公告)日：2022-06-07

申请号：US16479822

申请日：2017-07-06

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

Inventor： Boon Bing Ng ,  Rui Pan ,  Mohan Kumar Sudhakar ,  Brendan Hall

IPC: B41J2/045 ,  B41J2/01

Abstract: In some examples, a circuit for use with a memory element and a nozzle for outputting fluid, includes a data line, a fire line, and a selector responsive to the data line to select the memory element or the nozzle. The selector is to select the memory element responsive to the data line having a first value, and to select the nozzle responsive to the data line having a second value different from the first value. The fire line is to control activation of the nozzle in response to the nozzle being selected by the selector, and to communicate data of the memory element in response to the memory element being selected by the selector.

公开(公告)号：US11285717B2

公开(公告)日：2022-03-29

申请号：US17016757

申请日：2020-09-10

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

Inventor： Boon Bing Ng ,  Hang Ru Goy

IPC: B41J2/045 ,  G11C7/12 ,  B41J2/175 ,  G11C11/4094

Abstract: In some examples, a control apparatus for a fluid ejection device includes a plurality of selectors controllable by an input control signal to produce signals for selecting respective nozzles of the fluid ejection device, where a first selector is responsive to the input control signal propagated over a first signal path to turn on a device in the first selector, and a second selector is responsive to the input control signal to perform a different task. A memory encoder is to select a memory location in the memory, the memory encoder responsive to the input control signal propagated over a second signal path to turn on a device in the memory encoder, where signal loading of the second signal path is isolated from signal loading of the first signal path.

公开(公告)号：US20190152234A1

公开(公告)日：2019-05-23

申请号：US16095001

申请日：2016-07-15

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

Inventor： Jerrin Pathrose Vareed ,  Boon Bing Ng

IPC: B41J2/355 ,  B41J29/38 ,  B41J2/335 ,  B41J2/135

CPC classification number: B41J2/355 ,  B41J2/135 ,  B41J2/335 ,  B41J29/38

Abstract: Examples of a printhead assembly comprising an Erasable Programmable Read-only Memory (EPROM) having a predefined number of banks, with EPROM cells arranged in rows and columns in each of the banks are described. In one example, the printhead assembly comprises a shift register to generate, in consecutive shift register cycles, a row select signal, column select signal, and bank select signal to select a row, column, and bank, respectively, corresponding to an EPROM cell. A row select signal bus, column select signal bus and bank select signal bus is included in the printhead assembly to provide the row select signal, column select signal, and bank select signal, respectively, to the EPROM cell during the respective shift register cycles.

公开(公告)号：US10224935B2

公开(公告)日：2019-03-05

申请号：US15520698

申请日：2014-10-30

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

Inventor： Ning Ge ,  Boon Bing Ng ,  Leong Yap Chia

IPC: H03K19/18 ,  H03K19/173 ,  H03K3/45 ,  H03K19/0944 ,  G11C13/00

Abstract: A device having ratioed logic with a high impedance load is described. The device includes a pull-down network coupled between a first voltage and an output. The device also includes a high impedance load coupled between a second voltage and the output. The high impedance load being smaller than a transistor of the pull-down network.

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：US20180354271A1

公开(公告)日：2018-12-13

申请号：US15761621

申请日：2015-11-10

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

Inventor： Boon Bing Ng ,  Patrick Leonard ,  Raymond Connolly

IPC: B41J2/175 ,  G01F23/26

Abstract: The present subject matter relates to printhead-integrated ink level sensor (PILS) system. In an example implementation, the PILS system includes a sense capacitor plate in a fluid sensing chamber to sense a level of fluid in the fluid sensing chamber. The fluid sensing chamber is in fluid communication with a fluid reservoir of the printhead to receive fluid from the fluid reservoir. The sense capacitor plate includes at least one slot. The PILS system further includes at least one central clearing resistor and at least one peripheral clearing resistor to clear the fluid sensing chamber of the fluid. The central clearing resistor is provided in the at least one slot of the sense capacitor plate. The at least one peripheral resistor is provided in the fluid sensing chamber surrounding the sense capacitor plate.

公开(公告)号：US10029457B2

公开(公告)日：2018-07-24

申请号：US15327774

申请日：2014-07-30

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

Inventor： Boon Bing Ng ,  Thida Ma Win ,  Ning Ge ,  Jose Jehrome Rando

IPC: B41J2/045

Abstract: A nozzle firing cell may comprise a firing transistor and a pre-charge transistor having a source and drain coupled between a pre-charge line and a gate of the firing transistor wherein the pre-charge line is routed over the gate of the pre-charge transistor. A fluid ejection device may comprise a circuit comprising a nozzle firing cell, the nozzle firing cell comprising a firing transistor and a pre-charge transistor having a source and drain coupled between a pre-charge Sine and a gate of the firing transistor in which the pre-charge line is routed over the gate of the pre-charge transistor. A circuit may comprise a number of firing transistors and a number of pre-charge transistors each having a source and drain coupled between a pre-charge line and a gate of one of the firing transistors in which the pre-charge line is routed over each of the gates of the pre-charge transistors.