公开(公告)号：US12153245B2

公开(公告)日：2024-11-26

申请号：US18025988

申请日：2020-09-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Zhe Hu ,  Mingxing Wang ,  Tuhua Chen ,  Zhiping Liu ,  Yang Liu ,  Xiulong Men ,  Hailiang Hou ,  Huijie Xie ,  Yifei Zheng ,  Feng Zhao ,  Jingfei Chen ,  Bharat R. Acharya ,  Quinn D. Sanford ,  Matthew S. Cole ,  Tao Zhang

IPC: G06V40/13 ,  F21V8/00 ,  G02B27/14 ,  G02F1/1333

Abstract: An optical construction (100) includes a lightguide (102), a transmissive reflector (112), and an optical sensor (114). The lightguide (102) includes a first major surface (104) and a second major surface (106) opposite to the first major surface (104). The first major surface (104) includes a first portion (108) and an adjoining second portion (110). The transmissive reflector (112) is disposed adjacent to the first major surface (104) of the lightguide (102). The optical sensor (114) is disposed adjacent to the transmissive reflector (112) opposite to the lightguide (102). The optical sensor (114) is aligned with the first portion (108) of the first major surface (104) of the lightguide (102), such that the optical sensor (114) receives at least a portion of light passing through the first portion (108) of the first major surface (104) and transmitted by the transmissive reflector (112). The optical construction (100) further includes an enclosed gap (116) disposed between the first portion (108) of the first major surface (104) of the lightguide (102) and the transmissive reflector (112).

公开(公告)号：US20240151586A1

公开(公告)日：2024-05-09

申请号：US18279264

申请日：2022-02-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John A. Wheatley ,  Dawn V. Muyres ,  Jason W. Bjork ,  Mark August Roehrig ,  Gilles J. Benoit ,  Theresa J. Gerten ,  Zhaohui Yang ,  Audrey A. Sherman ,  Bharat R. Acharya ,  Edward J. Kivel

IPC: G01J3/51 ,  G01J3/02 ,  G01J3/10 ,  G01J3/44 ,  G01J3/46

CPC classification number: G01J3/513 ,  G01J3/0264 ,  G01J3/0267 ,  G01J3/0275 ,  G01J3/10 ,  G01J3/4406 ,  G01J2003/468 ,  G01J2003/516

Abstract: An optical device for sensing a presence of an analyte in a person is provided. The optical device includes a light source, an optical stack, and a reader. The light source emits a first light having a first wavelength. The optical stack is placed on a skin of the person. The optical stack includes a sensor material and an optical filter. The sensor material emits a second light having a second wavelength when irradiated with the first light. An optical property of the second light is sensitive to the presence of the analyte. The optical filter is disposed on the sensor material and includes a plurality of microlayers numbering at least 10 in total. The optical filter has different first and second transmittances at the respective first and second wavelengths.

公开(公告)号：US11960683B2

公开(公告)日：2024-04-16

申请号：US17996583

申请日：2021-05-04

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bharat R. Acharya ,  Robert D. Taylor ,  Joseph P. Attard ,  Benjamin J. Forsythe ,  David T. Yust ,  Matthew E. Sousa ,  Jason S. Petaja ,  Anthony M. Renstrom ,  William Blake Kolb ,  Matthew S. Cole ,  Matthew S. Stay ,  Matthew R. D. Smith ,  Jeremy O. Swanson ,  Tri D. Pham ,  David A. Rosen ,  Qunyi Chen ,  Lisa A. DeNicola ,  Quinn D. Sanford ,  Carl A. Stover ,  Lin Zhao ,  Gilles J. Benoit

IPC: G06F3/042 ,  F21V8/00 ,  G02B5/02 ,  G02B5/30

CPC classification number: G06F3/0421 ,  G02B5/0226 ,  G02B5/305 ,  G02B6/0051

Abstract: A display system for sensing a finger of a user applied to the display system includes a display panel; a sensor for sensing the finger; a sensing light source configured to emit a first light having a first wavelength W1; and a reflective polarizer disposed between the display panel and the sensor. For a substantially normally incident light, an optical transmittance of the reflective polarizer versus wavelength for a first polarization state has a band edge such that for a first wavelength range extending from a smaller wavelength L1 to a greater wavelength L2 and including W1, where 30 nm≤L2−L1≤50 nm and L1 is greater than and within about 20 nm of a wavelength L3 corresponding to an optical transmittance of about 50% along the band edge, the optical transmittance has an average of greater than about 75%.

公开(公告)号：US20240023905A1

公开(公告)日：2024-01-25

申请号：US18266049

申请日：2021-12-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Zhiping Liu ,  Fan Long ,  John A. Wheatley ,  Bharat R. Acharya ,  Ryan T. Fabick ,  Zhe Hu ,  Edward J. Kivel

IPC: A61B5/00 ,  A61B5/117 ,  A61B5/1455

CPC classification number: A61B5/7445 ,  A61B5/0062 ,  A61B5/117 ,  A61B5/14552 ,  A61B5/6826 ,  A61B5/489 ,  A61B5/14558

Abstract: A display system for sensing a user body portion, including a display panel configured to form an image for viewing by the user, an optical reflector having a plurality of polymeric layers, and at least one optical sensor for sensing a visible light having at least one visible wavelength and an infrared light having at least one infrared wavelength. The optical sensor senses the visible and infrared lights after the visible and infrared lights are transmitted by the optical reflector. The optical reflector has an average optical reflectance greater than 80% in the visible wavelength range, an optical transmittance greater than about 50% at the infrared wavelength, an optical transmittance of greater than about 2% and less than about 10% at the visible wavelength, and an optical transmittance versus wavelength with a bandpass segment having a full width at half maximum that includes the visible wavelength.

公开(公告)号：US20230367057A1

公开(公告)日：2023-11-16

申请号：US18025988

申请日：2020-09-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Zhe Hu ,  Mingxing Wang ,  Tuhua Chen ,  Zhiping Liu ,  Yang Liu ,  Xiulong Men ,  Hailiang Hou ,  Huijie Xie ,  Yifei Zheng ,  Feng Zhao ,  Jingfei Chen ,  Bharat R. Acharya ,  Quinn D. Sanford ,  Matthew S. Cole ,  Tao Zhang

IPC: F21V8/00

CPC classification number: G02B6/0055 ,  G02B27/14

Abstract: An optical construction (100) includes a lightguide (102), a transmissive reflector (112), and an optical sensor (114). The lightguide (102) includes a first major surface (104) and a second major surface (106) opposite to the first major surface (104). The first major surface (104) includes a first portion (108) and an adjoining second portion (110). The transmissive reflector (112) is disposed adjacent to the first major surface (104) of the lightguide (102). The optical sensor (114) is disposed adjacent to the transmissive reflector (112) opposite to the lightguide (102). The optical sensor (114) is aligned with the first portion (108) of the first major surface (104) of the lightguide (102), such that the optical sensor (114) receives at least a portion of light passing through the first portion (108) of the first major surface (104) and transmitted by the transmissive reflector (112). The optical construction (100) further includes an enclosed gap (116) disposed between the first portion (108) of the first major surface (104) of the lightguide (102) and the transmissive reflector (112).

公开(公告)号：US20230350244A1

公开(公告)日：2023-11-02

申请号：US18247209

申请日：2021-09-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carl A. Stover ,  Robert D. Taylor ,  Bharat R. Acharya

IPC: G02F1/1335 ,  G02F1/1333 ,  G06V10/143

CPC classification number: G02F1/133536 ,  G02F1/13338 ,  G06V10/143

Abstract: A reflective polarizer has a transmittance for a first polarization state having a band edge separating a first wavelength range extending at least from about 450 nm to about 900 nm and a second wavelength range extending at least from about 1100 nm to about 1300 nm. For the first polarization state, the reflective polarizer has an average transmittance in the first wavelength range less than about 10% and an average transmittance in the second wavelength range greater than about 80%; and for a second polarization state, the reflective polarizer has an average transmittance in the first wavelength range greater than about 40% and an average transmittance in the second wavelength range greater than about 80%. A display system includes the reflective polarizer and an infrared light source configured to emit an infrared light having a wavelength W1. The band edge has a band edge wavelength W2>W1.

公开(公告)号：US11745167B2

公开(公告)日：2023-09-05

申请号：US16763339

申请日：2018-11-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jerald K. Rasmussen ,  Derek J. Dehn ,  Clinton P. Waller, Jr. ,  Bharat R. Acharya ,  Satinder K. Nayar

IPC: B01J20/28 ,  B01D39/16 ,  B01J20/10 ,  B01J20/22 ,  B01J20/26 ,  B01J20/30

CPC classification number: B01J20/28026 ,  B01D39/1676 ,  B01J20/103 ,  B01J20/106 ,  B01J20/22 ,  B01J20/261 ,  B01J20/265 ,  B01J20/28021 ,  B01J20/305 ,  B01J20/3007 ,  B01D2239/0407 ,  B01D2239/10 ,  B01D2239/1208

Abstract: A polymer matrix composite comprising a porous polymeric network; and a plurality of functional particles distributed within the polymeric network structure, and wherein the polymer matrix composite has an air flow resistance at 25° C., as measured by the “Air Flow Resistance Test,” of less than 300 seconds/50 cm3/500 micrometers; and wherein the polymer matrix composite has a density of at least 0.3 g/cm3; and methods for making the same. The polymer matrix composites are useful, for example, as filters.

公开(公告)号：US20230273119A1

公开(公告)日：2023-08-31

申请号：US18111056

申请日：2023-02-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bharat R. Acharya ,  Raj Rajagopal ,  Gregory W. Sitton ,  Benjamin G. Sonnek ,  Robert M. Biegler ,  Gilles J. Benoit ,  Timothy J. Lindquist ,  John A. Wheatley ,  Kristal L. Schutta ,  James A. Phipps

IPC: G01N21/31

CPC classification number: G01N21/314 ,  G01N2021/317 ,  G01N2201/0453

Abstract: An optical well is configured to receive a test sample for examining an optical characteristic of the sample at a first wavelength in a predetermined wavelength range. The optical well includes a wall having a bottom wall portion and a sidewall portion defining a chamber for receiving the test sample, and an optical film formed into a shape so that a portion of the sidewall portion includes a first portion of the optical film, and a portion of the bottom wall portion includes a second portion of the optical film. For a normally incident light, the microlayers in each of the first and second portions have an average optical reflectance of greater than about 80% in the predetermined wavelength range. The forming results in the plurality of microlayers of the integral formed optical film having a thinnest portion and a thickest portion having a thickness difference of at least 30%.

公开(公告)号：US20220213372A1

公开(公告)日：2022-07-07

申请号：US17595092

申请日：2020-05-06

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Paul T. Hines ,  Derek J. Dehn ,  Sebastian Goris ,  Clinton P. Waller, Jr. ,  Mario A. Perez ,  Bharat R. Acharya ,  Ronald W. Ausen

IPC: C09K5/18 ,  C09K5/14 ,  C08K3/26 ,  C08K3/38 ,  C08K3/30 ,  C08K3/04 ,  C08J9/00 ,  C08J9/28

Abstract: (Co)polymer matrix composites including a porous (co)polymeric network; a multiplicity of thermally-conductive particles, and a multiplicity of endothermic particles distributed within the (co)polymeric network structure; wherein the thermally-conductive particles and endothermic particles are present in a range from 15 to 99 weight percent, based on the total weight of the particles and the (co)polymer (excluding the solvent). Optionally, the (co)polymer matrix composite volumetrically expands by at least 10% of its initial volume when exposed to a temperature of at least 135° C. Methods of making and using the (co)polymer matrix composites are also disclosed. The (co)polymer matrix composites are useful, for example, as heat dissipating or heat absorbing articles, as fillers, thermal interface materials, and thermal management materials, for example, in electronic devices, more particularly mobile handheld electronic devices, power supplies, and batteries.

公开(公告)号：US20180108915A1

公开(公告)日：2018-04-19

申请号：US15559948

申请日：2016-03-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Raymond P. Johnston ,  Onur S. Yordem ,  Brett J. Sitter ,  Bradley W. Eaton ,  Brian T. Weber ,  Gregory M. Haugen ,  Bharat R. Acharya ,  Brandon A. Bartling

IPC: H01M4/86

CPC classification number: H01M4/8605 ,  H01M4/0407 ,  H01M4/8652 ,  H01M4/8657 ,  H01M4/8673 ,  H01M4/88 ,  H01M2004/021

Abstract: The present disclosure relates to porous electrodes and electrochemical cells and liquid flow batteries produced therefrom. The disclosure further provides methods of making electrodes. The porous electrodes include polymer, e.g. non-electrically conductive polymer particulate fiber, and an electrically conductive carbon particulate. The non-electrically conductive, polymer particulate fibers may be in the form of a first porous substrate, wherein the first porous substrate is at least one of a woven or nonwoven paper, felt, mat and cloth. The porous electrode may have an electrical resistivity of less than about 100000 μOhm·m. The porous electrode may have a thickness from about 10 microns to about 1000 microns. Electrochemical cells and liquid flow batteries may be produced from the porous electrodes of the present disclosure.