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    RADIO FREQUENCY COVER REMOVAL DETECTION
    2.
    发明申请
    RADIO FREQUENCY COVER REMOVAL DETECTION 有权

    公开(公告)号：US20250077717A1

    公开(公告)日：2025-03-06

    申请号：US18461804

    申请日：2023-09-06

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

    Inventor： Xin-Chang Chen ,  He-Di Liu ,  Hsin-Chih Lin ,  Ming Hsuan Hsieh

    IPC: G06F21/86 ,  H04B17/309

    Abstract: A radio frequency (RF) tamper detector of an electronic device can offer improved chassis intrusion monitoring to protect the device from software and hardware-based tampering. The tamper detector can monitor RF noise levels in a first frequency band and in a second frequency band to calculate an RF noise level moving average for each frequency band. If the moving averages in both frequency bands exceed a RF noise threshold, the tamper detector can set a cover removal flag to indicate that a cover of the device housing has been removed. The tamper detector can cause the electronic device to lock or disable a system BIOS when cover removal is detected. Additionally, the electronic device can notify remote monitoring systems (e.g., operated by an IT administrator or warranty support center) to receive additional instructions to secure the device.

    Integrated circuit with address drivers for fluidic die
    5.
    发明授权
    Integrated circuit with address drivers for fluidic die 有权

    公开(公告)号：US12240231B2

    公开(公告)日：2025-03-04

    申请号：US17989354

    申请日：2022-11-17

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

    Inventor： Scott A. Linn ,  James Michael Gardner ,  Michael W. Cumbie

    IPC: B41J2/045

    Abstract: A fluidic die including an array of fluid actuating devices addressable by a set of addresses, and an array of memory elements including a first portion to receive a first set of address bits representative of a first portion of an address of the set of addresses, and a second portion to receive a second set of address bits representative of a second portion of the address of the set of addresses. A first address driver is to provide a first portion of the address of the set of addresses based on the first set of address bits received by the first portion of memory elements, and a second address driver is to provide a remaining portion of the address of the set of addresses based on a second set of address bits received by the second portion of memory elements.

    Fluidic dies
    6.
    发明授权
    Fluidic dies 有权

    公开(公告)号：US12240230B2

    公开(公告)日：2025-03-04

    申请号：US18246597

    申请日：2020-09-25

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

    Inventor： David Peinado Gutierrez ,  Ferran Olivera Corpas ,  David Vendrell Tornero

    IPC: B41J2/045

    Abstract: In an example a method comprises operating, by a processor, on a first quantity that is proportional to a side of a parallelogram printed, at least in part, on a substrate by a fluidic die, the side of the parallelogram being substantially perpendicular to the direction of advancement of the substrate. The method further comprises operating, by a processor, on a second quantity and a third quantity, the second and third quantities respectively being proportional to the length of the lines bisecting the parallelogram. The method comprises calculating, by a processor, an angle that the fluidic die makes with the direction of advancement of the substrate based on the first, second, and third quantities.

    Arrangements of circuit elements and fluidic elements
    8.
    发明授权
    Arrangements of circuit elements and fluidic elements 有权

    公开(公告)号：US12233647B2

    公开(公告)日：2025-02-25

    申请号：US18032534

    申请日：2020-10-23

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

    Inventor： Eric T. Martin ,  James R. Przybyla

    IPC: B41J2/145 ,  B41J2/14

    Abstract: In some examples, a fluidic die includes an arrangement of fluidic elements to dispense a fluid, each fluidic element of the fluidic elements including a fluidic actuator and a fluid chamber. An array of fluid feed holes is arranged in a plurality of dimensions to communicate the fluid with the fluidic elements, where each of multiple fluid feed holes along a first dimension of the plurality of dimensions is distinct from multiple fluid feed holes along a second dimension of the plurality of dimensions. The fluidic die includes first circuit elements operable at a first power supply voltage, the first circuit elements interspersed in regions between the fluidic elements along different axes of the fluidic die. The fluidic die includes second circuit elements operable at a second power supply voltage greater than the first power supply voltage, the second circuit elements comprising active devices and placed in a region outside of a boundary defining a space in which the fluidic elements and the first circuit elements are placed.

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