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公开(公告)号：US10816495B2
公开(公告)日：2020-10-27
申请号：US16470064
申请日：2017-12-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Christopher R. Yungers , Subhalakshmi M. Falknor , David H. Redinger
Abstract: An armor piece may include a tested material. The armor piece also may include a plurality of electrical contacts distributed about and electrically connected to the tested material. The armor piece further may include a non-volatile memory (NVM) device. The NVM device may be hardened against exposure to x-ray radiation. The NVM device may be configured to store control voltages associated with respective electrical contacts of the plurality of electrical contacts.
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公开(公告)号：US10008164B2
公开(公告)日：2018-06-26
申请号：US15315076
申请日：2015-05-27
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Guanglei Du , John A. Wheatley , Christopher R. Yungers , James M. Hillis
IPC: G09G3/36 , G02F1/1347 , G02F1/13 , F21V8/00
CPC classification number: G09G3/3644 , G02B6/0011 , G02F1/1323 , G02F1/13306 , G02F1/133504 , G02F1/13476 , G09G2310/06 , G09G2320/068
Abstract: Optical systems are described that include a switchable diffuser, a display panel, a lighting component and a diffuser controller. The diffuser controller is configured to switch the state of the switchable diffuser when the diffuser controller determines that the diffuser state is to be changed. The diffuser controller may be configured to vary an output level of the display panel in association with a change in state of the switchable diffuser. The optical system may also include a switching device which may be separable from the display panel.
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3.发明授权公开(公告)号：US11181498B2
公开(公告)日：2021-11-23
申请号：US16461438
申请日：2017-11-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： David H. Redinger , Christopher R. Yungers , Jennifer F. Schumacher
IPC: G01N27/20
Abstract: Systems and methods for detecting a crack or defect in a material are described. An example method may include determining, by a computing device, for each respective adjacent pair of electrodes of a plurality of electrodes electrically coupled to the material, a respective electrode pair voltage. The method also may include determining, by the computing device, for each respective adjacent pair of electrodes, a respective temperature-corrected electrode pair value based on the respective electrode pair voltage and at least one of a respective control voltage associated with the respective adjacent pair of electrodes or a temperature correction factor. The method may further include determining, by the computing device, whether the material includes a crack or defect based on the plurality of respective temperature-corrected electrode pair values.
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公开(公告)号：US20210293736A1
公开(公告)日：2021-09-23
申请号：US17303867
申请日：2021-06-09
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： David H. Redinger , Christopher R. Yungers , Jennifer F. Schumacher
Abstract: The disclosure describes techniques for detecting a crack or defect in a material. The technique may include applying an electrical signal to a first electrode pair electrically coupled to the material. The technique also may include, while applying the electrical signal to the first electrode pair, determining a measured voltage between a second, different electrode pair. At least one electrode of the second, different electrode pair is electrically coupled to the material. The technique may further include determining a corrected measured voltage by suppressing a thermally induced voltage from the measured voltage and determining whether the material includes a crack or other defect based on the corrected measured voltage.
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公开(公告)号：US20210208094A1
公开(公告)日：2021-07-08
申请号：US17301082
申请日：2021-03-24
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Abstract: A technique may include applying a first electrical signal to a first pair of drive electrodes, and, while applying the first electrical signal to the first pair of drive electrodes, determining a first measured voltage using a first measurement electrode. The technique further may include applying a second electrical signal to a second pair of drive electrodes, and, while applying the second electrical signal to the second pair of drive electrodes, determining a second measured voltage using a second, different measurement electrode. The first pair of drive electrodes, the second pair of drive electrodes, the first measurement electrode, and the second, different measurement electrode may from a set of N electrodes electrically coupled to the material. The technique also may include determining whether the material includes a crack or other defect based on a comparison between the first measured voltage and the second measured voltage.
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Patent Agency Ranking
公开(公告)号：US10983081B2
公开(公告)日：2021-04-20
申请号：US16461452
申请日：2017-11-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Abstract: A technique may include applying a first electrical signal to a first pair of drive electrodes, and, while applying the first electrical signal to the first pair of drive electrodes, determining a first measured voltage using a first measurement electrode. The technique further may include applying a second electrical signal to a second pair of drive electrodes, and, while applying the second electrical signal to the second pair of drive electrodes, determining a second measured voltage using a second, different measurement electrode. The first pair of drive electrodes, the second pair of drive electrodes, the first measurement electrode, and the second, different measurement electrode may from a set of N electrodes electrically coupled to the material. The technique also may include determining whether the material includes a crack or other defect based on a comparison between the first measured voltage and the second measured voltage.
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公开(公告)号：US11609202B2
公开(公告)日：2023-03-21
申请号：US17301082
申请日：2021-03-24
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Abstract: A technique may include applying a first electrical signal to a first pair of drive electrodes, and, while applying the first electrical signal to the first pair of drive electrodes, determining a first measured voltage using a first measurement electrode. The technique further may include applying a second electrical signal to a second pair of drive electrodes, and, while applying the second electrical signal to the second pair of drive electrodes, determining a second measured voltage using a second, different measurement electrode. The first pair of drive electrodes, the second pair of drive electrodes, the first measurement electrode, and the second, different measurement electrode may from a set of N electrodes electrically coupled to the material. The technique also may include determining whether the material includes a crack or other defect based on a comparison between the first measured voltage and the second measured voltage.
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公开(公告)号：US11255807B2
公开(公告)日：2022-02-22
申请号：US16461423
申请日：2017-11-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Abstract: A measurement system may include control electronics; an electrical signal source; a plurality of measurement system electrical contacts; at least one feature for repeatably electrically connecting the plurality of measurement system electrical contacts to selected locations of a tested material. The control electronics may be configured to cause the electrical signal source to output an electrical signal; determine a measured voltage in response to the electrical signal using a measurement electrical contact from the plurality of measurement system electrical contacts. The measurement electrical contact is electrically coupled to the tested material. The control electronics also may be configured to determine whether the tested material includes a crack or other defect based on the measured voltage.
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公开(公告)号：US11105762B2
公开(公告)日：2021-08-31
申请号：US16469955
申请日：2017-12-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Christopher R. Yungers , Subhalakshmi M. Falknor , David H. Redinger
Abstract: A measurement system may include a set of drive electrical contacts including a force electrical contact and a return electrical contact electrically coupled to a tested material, a measurement electrical contact electrically coupled to the tested material, a return node, a voltage source, and a control module. A circuit path between the voltage source and the return node may include a fixed resistor and the tested material. The control module may be configured to cause the voltage source to apply a voltage signal to the force electrical contact, cause a voltage drop across the fixed resistor to be measured, cause a measured voltage to be measured using the measurement electrical contact, determine a measured equivalent impedance of the tested material associated with the measurement electrical contact based on the voltage drop across the fixed resistor and the measured voltage, and determine whether the tested material includes a crack or other defect based on the measured equivalent impedance.
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公开(公告)号：US20170116937A1
公开(公告)日：2017-04-27
申请号：US15315076
申请日：2015-05-27
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Guanglei Du , John A. Wheatley , Christopher R. Yungers , James M. Hillis
IPC: G09G3/36 , G02F1/13 , G02F1/1347
CPC classification number: G09G3/3644 , G02B6/0011 , G02F1/1323 , G02F1/13306 , G02F1/133504 , G02F1/13476 , G09G2310/06 , G09G2320/068
Abstract: Optical systems are described that include a switchable diffuser, a display panel, a lighting component and a diffuser controller. The diffuser controller is configured to switch the state of the switchable diffuser when the diffuser controller determines that the diffuser state is to be changed. The diffuser controller may be configured to vary an output level of the display panel in association with a change in state of the switchable diffuser. The optical system may also include a switching device which may be separable from the display panel.
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