公开(公告)号：US12240237B2

公开(公告)日：2025-03-04

申请号：US18123134

申请日：2023-03-17

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

Inventor： Vincent C. Korthuis ,  Huyen Pham ,  Tsuyoshi Yamashita

IPC: B41J2/14 ,  H01H85/02

Abstract: In example implementations, a printhead die is provided. The printhead die includes a substrate, a chamber layer formed on the substrate, a plurality of printing fluid ejection chambers coupled to opposite sides of the chamber layer and along a length of the chamber layer, and a top hat layer formed on the chamber layer and the plurality of printing fluid ejection chambers. The chamber layer includes a void to store printing fluid. The top hat layer includes an initial unsupported top hat layer portion over the void, wherein the initial unsupported top hat layer portion comprises a first end that is narrower than a second end.

公开(公告)号：US10780705B2

公开(公告)日：2020-09-22

申请号：US16095478

申请日：2016-07-29

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

Inventor： Nicholas McGuinness ,  Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D Torniainen ,  David P Markel

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175

Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with the fluid slot and each of the two laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with the fluid circulating element laterally adjacent at least one of the two laterally adjacent fluid ejection chambers, and the two laterally adjacent fluid ejection chambers to substantially simultaneously eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.

公开(公告)号：US10730312B2

公开(公告)日：2020-08-04

申请号：US16270664

申请日：2019-02-08

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

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D. Torniainen

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/16 ,  B41J2/175

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.

公开(公告)号：US11827512B2

公开(公告)日：2023-11-28

申请号：US17251236

申请日：2018-09-24

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

Inventor： Eric Martin ,  Rogelio Cicili ,  Tsuyoshi Yamashita

IPC: B81B7/00 ,  B81B1/00 ,  B81B3/00 ,  B81C1/00 ,  B41J2/045

CPC classification number: B81B7/0006 ,  B41J2/0455 ,  B41J2/0458 ,  B41J2/04541 ,  B41J2/04543 ,  B81B1/00 ,  B81B3/0021 ,  B81C1/00071 ,  B81C1/00095 ,  B81C1/00119 ,  B81B2201/05 ,  B81B2203/0338

Abstract: Examples include a fluidic die. The fluidic die comprises an array of field effect transistors including field effect transistors of a first size and field effect transistors of a second size. At least one connecting member interconnects at least some of the field effect transistors of the array of field effect transistors. The fluidic die further comprises a first fluid actuator connected to a first set of field effect transistors having at least one field effect transistor of the first size. The die includes a second fluid actuator connected to a second respective set of field effect transistors having a first respective field effect transistor of the second size interconnected to at least one other field effect transistor of the array.

公开(公告)号：US11648773B2

公开(公告)日：2023-05-16

申请号：US17414413

申请日：2019-09-06

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

Inventor： Vincent C. Korthuis ,  Huyen Pham ,  Tsuyoshi Yamashita

IPC: B41J2/14

CPC classification number: B41J2/1404

Abstract: In example implementations, a printhead die is provided. The printhead die includes a substrate, a chamber layer formed on the substrate, a plurality of printing fluid ejection chambers coupled to opposite sides of the chamber layer and along a length of the chamber layer, and a top hat layer formed on the chamber layer and the plurality of printing fluid ejection chambers. The chamber layer includes a void to store printing fluid. The top hat layer includes an initial unsupported top hat layer portion over the void, wherein the initial unsupported top hat layer portion comprises a first end that is narrower than a second end.

公开(公告)号：US10326911B2

公开(公告)日：2019-06-18

申请号：US15518197

申请日：2014-10-14

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

Inventor： Jason Quintana ,  Tsuyoshi Yamashita ,  Matthew A Shepherd

IPC: H04N1/405 ,  G06F3/12 ,  H04N1/52 ,  H04N1/047

Abstract: A system, method, and non-transitory computer readable medium are disclosed for mitigating dot placement errors for a given print job. The method includes processing tone values on a per pixel basis to determine whether to implement plane dependence. Plane independence is implemented if the tone value exceeds a predetermined threshold. The method may be performed on a pixel by pixel basis and/or a print object or region basis. Determining whether to implement plane dependence may involve de-asserting or partially de-asserting a plane dependence component of an executed half-toning instruction between sequentially processed color planes of a printing system.

公开(公告)号：US20220134745A1

公开(公告)日：2022-05-05

申请号：US17434780

申请日：2019-06-17

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

Inventor： Eric Thomas Martin ,  Tsuyoshi Yamashita ,  Vincent C. Korthuis

IPC: B41J2/14 ,  B41J2/16

Abstract: According to examples, an apparatus may include a fluidic chamber, in which fluid is to be temporarily held. The apparatus may also include a heating component to generate heat to form a drive bubble in the fluid held in the fluidic chamber and a cavitation plate may be provided between the fluidic chamber and the heating component. The cavitation plate may be in communication with the fluidic chamber and may physically separate the fluidic chamber from the heating component to protect the heating component. In addition, a controller may determine a condition in the fluidic chamber based on an electrical signal received from the cavitation plate.

公开(公告)号：US20210114032A1

公开(公告)日：2021-04-22

申请号：US17044404

申请日：2018-04-23

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

Inventor： Garrett E. Clark ,  Si-lam Choy ,  Jacob Lum ,  Craig Olbrich ,  Jeremy Sells ,  Tsuyoshi Yamashita

IPC: B01L3/00

Abstract: A fluidic die may include a at least one actuator, and fluid flow architecture to flow a first fluid through at least one fluidic channel, and flow a second fluid through the at least one fluidic channel to form a laminar flow between the first fluid and the actuator. The at least one actuator forms a drive bubble from the second fluid to cause the first fluid to be ejected from the fluidic die.

公开(公告)号：US20210039383A1

公开(公告)日：2021-02-11

申请号：US16965703

申请日：2018-03-12

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

Inventor： Eric Martin ,  Tsuyoshi Yamashita ,  James R. Przybyla

IPC: B41J2/045

Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. Each actuator is disposed in a fluid chamber. The fluidic die also includes an array of fluid sensors. Each fluid sensor is disposed within a fluid chamber and determines a characteristic within the fluid chamber. A data parser of the fluidic die extracts from an incoming signal, firing instructions and measurement instructions for the fluidic die. The measurement instructions indicate at least one of a peak measurement during a nucleation event and a reference measurement during a non-nucleation event. A firing controller generates firing signals based on the firing instructions and a measurement controller activates, during a measurement interval of a printing cycle for the primitive, a measurement for a selected actuator based on the measurement instructions.

公开(公告)号：US20200031135A1

公开(公告)日：2020-01-30

申请号：US16337579

申请日：2017-01-23

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

Inventor： Tsuyoshi Yamashita ,  Alexander Govyadinov ,  Nick McGuinness ,  Erik D Torniainen ,  David P Markel

IPC: B41J2/18

Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each communicated with the fluid slot and having a drop ejecting element therein, and a fluid circulation path communicated with each of the two laterally adjacent fluid ejection chambers and having a fluid circulating element therein, with the two laterally adjacent fluid ejection chambers to concurrently eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.