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公开(公告)号：US11541658B2
公开(公告)日：2023-01-03
申请号：US17251982
申请日：2019-01-31
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Daryl E. Anderson , Eric Martin , James R. Przybyla , Chien-Hua Chen
Abstract: One example provides a fluidic die including a semiconductor substrate, and a nozzle layer disposed on the substrate, the nozzle layer having a top surface opposite the substrate and including a nozzle formed therein, the nozzle including a fluid chamber disposed below the top surface and a nozzle orifice extending through the nozzle layer from the top surface to the fluid chamber, the fluid chamber to hold fluid, and the nozzle to eject fluid drops from the fluid chamber via the nozzle orifice. An electrode is disposed in contact with the nozzle layer about a perimeter of the nozzle orifice, the electrode to carry an electrical charge to adjust movement of electrically charged components of the fluid.
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公开(公告)号：US11376862B2
公开(公告)日：2022-07-05
申请号：US16603570
申请日：2018-07-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： James R. Przybyla , Jordan E. Morris
Abstract: The fluid ejection device includes a plurality of nozzles and a plurality of ejection chambers that includes a respective ejection chamber fluidically coupled to a respective nozzle. A plurality of inlet passages are fluidically coupled to the ejection chambers and input fluid to the ejection chambers at a first pressure. A plurality of outlet passages are fluidically coupled to the ejection chambers and output fluid from the ejection chambers at a second pressure that is less than the first pressure. Fluid circulates through the ejection chambers based on the pressure difference between the first and second pressure. The fluid ejection device also includes at least one micropump fluidically coupled to at least one ejection chamber to pump fluid through the at least one ejection chamber.
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Patent Agency Ranking
33.发明授权公开(公告)号：US11325370B2
公开(公告)日：2022-05-10
申请号：US16978223
申请日：2018-05-15
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Eric Martin , James R. Przybyla , Rogelio Cicili
Abstract: A fluidic die including fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a first voltage level. Monitoring circuitry, operating at a second voltage level lower than the first voltage level, includes a select transistor and a pulldown transistor for each fluid chamber to selectively couple to the electrode, at least the select transistor being a high voltage tolerant transistor to operate at the second voltage in a normal operating condition and having a breakdown voltage level greater than the first voltage level to prevent a fault current from flowing into the select transistor from the electrode in a fault condition if the fluid actuator short-circuits to the electrode.
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公开(公告)号：US20210370668A1
公开(公告)日：2021-12-02
申请号：US17058690
申请日：2019-01-31
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Eric Martin , Daryl E. Anderson , James R. Przybyla , Chien-Hua Chen , Diane R. Hammerstad
Abstract: One example provides a fluidic die including a nozzle layer disposed on a substrate, the nozzle layer having an upper surface opposite the substrate and including a plurality of nozzles formed therein, each nozzle including a fluid chamber and a nozzle orifice extending through the nozzle layer from the upper surface to the fluid chamber. A conductive trace is exposed to the upper surface of the nozzle layer and extends proximate to a portion of the nozzle orifices, an impedance of the conductive trace indicative of a surface condition of the upper surface of the nozzle layer.
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公开(公告)号：US20210347169A1
公开(公告)日：2021-11-11
申请号：US17251967
申请日：2019-01-31
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： James R. Przybyla , Eric Martin , Daryl E. Anderson , Chien-Hua Chen
Abstract: One example provides a fluidic device including a substrate, a nozzle layer disposed on the substrate, the nozzle layer having an upper surface opposite the substrate including a plurality of nozzles formed therein, each nozzle including a fluid chamber and a nozzle orifice extending through the nozzle layer from the upper surface to the fluid chamber. A number of conductive traces are disposed in direct contact with the nozzle layer to provide electrical pathways above the substrate.
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公开(公告)号：US10967646B2
公开(公告)日：2021-04-06
申请号：US15570691
申请日：2015-07-14
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Kianoush Naeli , James R. Przybyla
Abstract: A check valve for preventing reverse flow of jettable material within a jettable material firing chamber during a firing event includes a free-floating plug. The check valve further includes at least one holding post, wherein the free-floating plug is arranged between at least one wall of the firing chamber and the holding posts, the at least one wall and the holding posts restricting the movement of the free-floating plug within the chamber.
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公开(公告)号：US10960661B2
公开(公告)日：2021-03-30
申请号：US16400071
申请日：2019-05-01
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Chris Bakker , James R. Przybyla
Abstract: In some examples, a circuit for a fluid ejection device includes an energy delivery device and a circuit layer. The circuit layer includes first and second activation devices connected to the energy delivery device, the first and second activation devices to activate the energy delivery device, first drive logic coupled to the first activation device, and second drive logic coupled to the second activation device. An interconnect layer couples a same address selection signal to the first drive logic and the second drive logic.
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