公开(公告)号：US20200001306A1

公开(公告)日：2020-01-02

申请号：US16486134

申请日：2017-02-14

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

Inventor： Ning Ge ,  Paul Howard Mazurkiewicz ,  Helen A. Holder ,  Peter A. Seiler ,  Raphael Gay ,  Tom J. Searby

IPC: B03C3/155 ,  B03C3/41 ,  B03C3/68 ,  B01D46/00

Abstract: In an example, an air filter assembly includes an air filter to remove particulates from air flowing through the air filter, sense electrodes coupled to the air filter, the sense electrodes spaced apart in a direction that is transverse to a direction of a flow of the air, a sense interconnects to couple the sense electrodes to a first power source to drive a sense electrode of the sense electrodes to a sense power, charge electrodes coupled to the air filter, where the charge electrodes are spaced apart from and adjacent to the sense electrodes, and charge interconnects to couple the charge electrodes to a second power source to drive a charge electrode of the charge electrodes to a charge power different from the sense power.

公开(公告)号：US10521711B1

公开(公告)日：2019-12-31

申请号：US16463525

申请日：2017-02-22

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

Inventor： Ning Ge ,  Jarrid Wittkopf ,  Robert Ionescu ,  Helen A. Holder ,  Paul Howard Mazurkiewicz

IPC: G06K19/073 ,  G06K7/10

Abstract: In some examples, a controllable read blocking based radio-frequency identification (RFID) device may include a substrate layer, and a trace formed of a conductive material and disposed on, partially within, or fully within the substrate layer. The controllable read blocking based RFID device may further include a controllable read blocking layer disposed on the substrate layer and the trace and including a fluid disposed in the controllable read blocking layer to selectively block or allow passage of electromagnetic waves to the trace to respectively inhibit or allow communication of a RFID reading device with the controllable read blocking based RFID device.

公开(公告)号：US20190377994A1

公开(公告)日：2019-12-12

申请号：US16463525

申请日：2017-02-22

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

Inventor： Ning Ge ,  Jarrid Wittkopf ,  Robert Ionescu ,  Helen A. Holder ,  Paul Howard Mazurkiewicz

IPC: G06K19/073 ,  G06K7/10

Abstract: In some examples, a controllable read blocking based radio-frequency identification (RFID) device may include a substrate layer, and a trace formed of a conductive material and disposed on, partially within, or fully within the substrate layer. The controllable read blocking based RFID device may further include a controllable read blocking layer disposed on the substrate layer and the trace and including a fluid disposed in the controllable read blocking layer to selectively block or allow passage of electromagnetic waves to the trace to respectively inhibit or allow communication of a RFID reading device with the controllable read blocking based RFID device.

公开(公告)号：US20180108716A1

公开(公告)日：2018-04-19

申请号：US15567608

申请日：2015-07-09

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

Inventor： Gang Xu ,  Helen A. Holder

IPC: H01L27/32 ,  G06F3/044 ,  G06F3/041 ,  H01L51/52 ,  H01L51/00

CPC classification number: H01L27/3244 ,  G06F1/1652 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04102 ,  G09F9/301 ,  H01L27/323 ,  H01L27/326 ,  H01L27/3262 ,  H01L51/0097 ,  H01L51/5253 ,  H01L51/5281 ,  H01L2251/5338 ,  H01L2251/558 ,  H04M1/0268

Abstract: Example implementations relate to flexible displays. For example, a flexible display system may comprise a plurality of display layers, an anti-reflective layer among the plurality of display layers to reduce reflection from an underlying light emitting layer, the anti-reflective layer including a wave plate and a polarizer, and a transistor layer among the plurality of display layers. Further, at least a portion of the plurality of display layers may include properties satisfying particular geometric and force balance constraints to enable the transistor layer to maintain a neutral force in response to compression or tension of the flexible display.