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公开(公告)号：US20170019543A1
公开(公告)日：2017-01-19
申请号：US14800086
申请日：2015-07-15
Applicant: Lexmark International, Inc.
Inventor： Masahito Cho , Peter Joseph Mendel , Robert Henry Muyskens , Adam Randal Wiedemann
CPC classification number: H04N1/00129 , H04N1/00381 , H04N1/00392 , H04N1/02895 , H04N1/1065 , H04N1/19594 , H04N2201/0081 , H04N2201/0089
Abstract: An imaging device, including a panel having a privacy layer selectively configurable in a transparent state and an opaque state that blocks light from passing through the panel, and a display layer made of transparent material and positioned between the privacy layer and an outer surface of the panel, the display layer spaced from the privacy layer. A scanning device is disposed proximate to a surface of the privacy layer opposite the outer surface of the panel, for scanning an object positioned along the outer surface of the panel, wherein the controller operates the privacy layer in the transparent state and the display layer to not display image data in at least a first portion of panel such that the first portion thereof is transparent during the scanning operation for scanning the object.
Abstract translation: 一种成像装置，包括具有可选择性地配置为透明状态的隐私层的面板和阻挡光穿过面板的不透明状态，以及由透明材料制成并位于隐私层与外部表面之间的显示层 显示层与隐私层间隔开。 扫描装置设置在与面板的外表面相对的隐私层的表面附近，用于扫描沿着面板的外表面定位的物体，其中控制器将透明状态的隐私层和显示层操作为 在面板的至少第一部分中不显示图像数据，使得在用于扫描对象的扫描操作期间，其第一部分是透明的。
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公开(公告)号：USD911331S1
公开(公告)日：2021-02-23
申请号：US29684253
申请日：2019-03-19
Applicant: Lexmark International, Inc.
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公开(公告)号：USD903756S1
公开(公告)日：2020-12-01
申请号：US29672254
申请日：2018-12-04
Applicant: Lexmark International, Inc.
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公开(公告)号：US11645484B2
公开(公告)日：2023-05-09
申请号：US16811418
申请日：2020-03-06
Applicant: Lexmark International, Inc.
Inventor： Scott Richard Castle , Robert Henry Muyskens , Brant Dennis Nystrom
CPC classification number: G06K7/1404 , G06F21/30 , G06F21/44 , G06F21/73 , H04L9/0866 , H04L9/3278 , G06K1/12 , G06K2007/10524 , H04L2209/12
Abstract: Unique physical unclonable function objects are created by molding pre-magnetized or post-magnetized particles into a resin. The particles form a unique physical “fingerprint” based on the random particle size, position, polar rotation, magnetization level, particle density, etc. This invention addresses devices for accurately measuring the physical fingerprint of a PUF, specifically including the X, Y, & Z components of the magnetic field at enough discrete points on the PUF to allow a confident recognition of the identification. A handheld wand is described for measuring the magnetic field along an arbitrary path.
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公开(公告)号：US20230110624A1
公开(公告)日：2023-04-13
申请号：US18081427
申请日：2022-12-14
Applicant: Lexmark International, Inc.
IPC: G01R33/07 , H01L21/302
Abstract: A physically unclonable function is an object that has characteristics that make it extremely difficult or impossible to copy. An array of randomly dispersed hard (magnetized) and soft (non-magnetized) magnetic particles that may be conducting or nonconducting that are disbursed in a binder create a particular magnetic field or capacitive pattern on the surface. This surface magnetic field and capacitive variations can be considered to be a unique pattern similar to fingerprint. The Hall effect prism is a sensor that measures the effects of these patterns by sensing the deformation of currents or electric potential flowing within or around a resistive substrate material that exhibits a substantial Hall effect coefficient.
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Patent Agency Ranking
公开(公告)号：USD903757S1
公开(公告)日：2020-12-01
申请号：US29672258
申请日：2018-12-04
Applicant: Lexmark International, Inc.
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公开(公告)号：US20200300935A1
公开(公告)日：2020-09-24
申请号：US16816948
申请日：2020-03-12
Applicant: Lexmark International, Inc.
IPC: G01R33/07 , H01L21/302
Abstract: A physically unclonable function is an object that has characteristics that make it extremely difficult or impossible to copy. An array of randomly dispersed hard (magnetized) and soft (non-magnetized) magnetic particles that may be conducting or nonconducting that are disbursed in a binder create a particular magnetic field or capacitive pattern on the surface. This surface magnetic field and capacitive variations can be considered to be a unique pattern similar to fingerprint. The Hall effect prism is a sensor that measures the effects of these patterns by sensing the deformation of currents or electric potential flowing within or around a resistive substrate material that exhibits a substantial Hall effect coefficient.
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公开(公告)号：US11632256B2
公开(公告)日：2023-04-18
申请号：US17541003
申请日：2021-12-02
Applicant: Lexmark International, Inc.
Inventor： Scott Richard Castle , Gary Allen Denton , Robert Henry Muyskens , Samuel Leo Rhodus
Abstract: The use of a magnetic particle based “PUF” (Physically Unclonable Function) disk, when read by magnetic sensor(s), as a positional encoder is described. It is often necessary to include a linear or rotary encoder within a device for tracking motor movements, or to enable a closed-loop control algorithm on the motor system. These randomly dispersed magnetic particle disks can be used as a positional encoder, where the speed of movement and the direction of movement may be monitored.
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公开(公告)号：US11416193B2
公开(公告)日：2022-08-16
申请号：US16822365
申请日：2020-03-18
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Scott Richard Castle , Gary Allen Denton , Robert Henry Muyskens , Samuel Leo Rhodus , Brant Dennis Nystrom , Carl Edmond Sullivan
Abstract: A physical unclonable function (“PUF”) object can be used to encode the geography or region in which device to which the PUF is attached may operate. Disclosed are two potential ways to regionalize a device using a PUF disk: placing the magnetic sensor at a different radius depending on the region or geography intended for sale; and altering the magnetic structure of the disk to magnetically encode the region into the sensor data.
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公开(公告)号：US11290290B2
公开(公告)日：2022-03-29
申请号：US16822355
申请日：2020-03-18
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Scott Richard Castle , Gary Allen Denton , Robert Henry Muyskens , Samuel Leo Rhodus , Brant Dennis Nystrom
Abstract: Magnetic PUFs (Physical Unclonable Function) may utilizes a single 3-axis Hall-effect sensor for enrollment. When a PUF is manufactured, a Hall-effect sensor is used to model the PUF disk and store that data where it may be accessed. This process is called “enrollment.” This invention improves upon the PUF implementation by introducing controlled variability into the enrollment, the reading of the PUF data from the Hall-effect sensors (the number and position of read sensors), the sampling method of the read sensor(s), and the processing of the PUF data.
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