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    MICROFLUIDIC DEVICE CHANNEL LAYER
    21.
    发明申请
    MICROFLUIDIC DEVICE CHANNEL LAYER 有权

    公开(公告)号：US20210197199A1

    公开(公告)日：2021-07-01

    申请号：US16076553

    申请日：2017-07-12

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

    Inventor： Viktor SHKOLNIKOV ,  Michael W. CUMBIE ,  Chien-Hua CHEN

    IPC: B01L3/00

    Abstract: A channel layer of a digital microfluidic device may include a number of sample wells located on a first side of the die, a number of first capillary channels fluidically coupled to each of the sample wells, the first capillary channels drawing a fluid from the sample wells using capillary forces, a capillary break fluidically coupled to each of the first capillary channels to dispense a portion of the fluid drawn from the sample wells through the capillary forces, a number of intermediate chambers fluidically coupled to the capillary break, a number of second capillary channels fluidically coupled to the intermediate chambers, the second capillary channels drawing the fluid from the intermediate chambers using capillary forces, and a number of mixing chambers fluidically coupled to the second capillary channels into which the capillary forces of the second capillary channels cause the fluid to enter the mixing chambers.

    COMPLEX IMPEDANCE DETECTION
    22.
    发明申请
    COMPLEX IMPEDANCE DETECTION 审中-公开

    公开(公告)号：US20200331259A1

    公开(公告)日：2020-10-22

    申请号：US16092978

    申请日：2016-07-21

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

    Inventor： Chien-Hua CHEN ,  Michael W. CUMBIE ,  Devin Alexander Mourey

    IPC: B41J2/045 ,  B41J2/125 ,  B41J2/07 ,  G06F3/12

    Abstract: A printhead may include a nozzle, a firing chamber fluidly coupled to the nozzle, a printing fluid slot fluidly coupled to the firing chamber, and a sensor to detect a plurality of complex impedance values of a printing fluid at the printhead over a plurality of frequencies and create a printing fluid signature of the printing fluid. A method of determining at least one characteristic of a printing fluid provided to a printhead ma include, with a number of sensors, applying an alternating current at a plurality of frequencies over time to the printing fluid to receive a plurality of complex impedance values and comparing the plurality of complex impedance signals to a number of stored signals.

    PRINTHEAD DIES MOLDED WITH NOZZLE HEALTH SENSOR
    27.
    发明申请
    PRINTHEAD DIES MOLDED WITH NOZZLE HEALTH SENSOR 有权
    带喷头健康传感器的头部模具

    公开(公告)号：US20160339695A1

    公开(公告)日：2016-11-24

    申请号：US15111878

    申请日：2014-01-30

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

    Inventor： Chien-Hua CHEN ,  Michael W. Cumbie ,  Brett E. Dahlgren

    IPC: B41J2/14 ,  B41J2/16

    CPC classification number: B41J2/165 ,  B41J2/14032 ,  B41J2/1404 ,  B41J2/1433 ,  B41J2/145 ,  B41J2/1603 ,  B41J2/1637 ,  B41J2/16579 ,  B41J2002/14354

    Abstract: In an implementation, a printhead includes a printhead die molded into a molding. The die has a front surface exposed outside the molding to dispense fluid drops through nozzles and an opposing back surface covered by the molding except at a channel in the molding through which fluid may pass directly to the back surface. The die also has a nozzle health sensor molded into the molding to detect defective nozzles in the printhead die.

    Abstract translation: 在一个实施方案中，打印头包括模制成模制品的打印头模具。 模具具有暴露在模制件外部的前表面，以通过喷嘴分配液滴，以及由模制物覆盖的相对后表面，除了模制品中的通道之外，流体可以通过该通道直接通过背面。 模具还具有模制到模制件中的喷嘴健康传感器，以检测打印头芯片中的有缺陷的喷嘴。

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