公开(公告)号：US11874456B2

公开(公告)日：2024-01-16

申请号：US17161847

申请日：2021-01-29

Applicant: NORTH CAROLINA STATE UNIVERSITY

Inventor： Pedro P. Vergara Gonzalez ,  Leda M. Lunardi

IPC: G02B26/00 ,  G02B1/00 ,  G02B5/08 ,  H02N1/00

CPC classification number: G02B26/007 ,  G02B1/005 ,  G02B5/0841 ,  G02B26/001 ,  H02N1/006

Abstract: The presently disclosed subject matter relates to electromechanical systems and devices, and more particularly to electromechanical systems for implementing reflective devices for displays, sensors, and authentication solutions. In some embodiments a reflective device includes a thin film transistor layer and a plurality of reflective elements positioned approximately parallel to the thin film transistor layer. The plurality of reflective elements is electrically coupled with the thin film transistor layer. Each reflective element is configured for controlling a reflectance parameter of the reflective element based on a first voltage applied to the reflective element by the thin film transistor. In other embodiments, a reflective element includes a transparent substrate and a plurality of polymer-air pair layers positioned approximately parallel position to the transparent substrate. The plurality of polymer-air pair layers are configured to vary a reflectance parameter based on a force applied to the plurality of polymer-air pair layers.

公开(公告)号：US20230333297A1

公开(公告)日：2023-10-19

申请号：US18337722

申请日：2023-06-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Adam D. Haag ,  Sun-Yong Park ,  Timothy J. Nevitt ,  Brianna N. Wheeler ,  Jody L. Peterson

IPC: G02B5/30 ,  G02B1/08 ,  H10K50/80

CPC classification number: G02B5/3041 ,  G02B1/08 ,  G02B5/3083 ,  G02B5/305 ,  H10K50/868 ,  G02B5/0841

Abstract: A partial reflector including a plurality of optical repeat units where each optical repeat unit includes first and second polymer layers is described. A refractive index difference between the first and second polymer layers along a first axis may be Δny, a refractive index difference between the first and second polymer layers along an orthogonal second axis may be Δnx, where |Δnx| is at least 0.1 and |Δny| is no more than 0.04. The optical repeat units may have a smallest optical thickness T1 proximate a first side of the optical stack and a largest optical thickness T2 proximate an opposite second side of the optical stack, where (T2−T1)/(T2+T1) can be a range of 0.05 to 0.2, and T2 can be at least 350 nm and no more 1250 nm. The partial reflector may be used in a circular polarizer for correcting color shift with view angle in a display.

公开(公告)号：US11732194B2

公开(公告)日：2023-08-22

申请号：US17028823

申请日：2020-09-22

Applicant: FUJIFILM Corporation

Inventor： Keisuke Kodama ,  Mitsuyoshi Ichihashi ,  Shunya Katoh ,  Takeshi Nakamori

IPC: G02B5/08 ,  C09K19/58 ,  B42D25/328 ,  G02B5/30 ,  C09K19/36 ,  G01N21/21 ,  C09K19/20

CPC classification number: C09K19/586 ,  B42D25/328 ,  G02B5/3016 ,  C09K19/36 ,  C09K2019/2078 ,  G01N21/21 ,  G01N2021/216 ,  G01N2201/0683 ,  G02B5/0841 ,  B42D25/328 ,  B42D25/30

Abstract: Provided are a cholesteric liquid crystal layer having an excellent reflection anisotropy, a low haze, and a high circular polarization degree of reflected light, and a method for producing the same. In addition, provided are a laminate, an optically anisotropic body, and a reflective film, each of which including the cholesteric liquid crystal layer. A cholesteric liquid crystal layer formed using a liquid crystal compound, in which, in at least one main plane out of a pair of main planes of the cholesteric liquid crystal layer, a direction of a molecular axis of the liquid crystal compound changes while continually rotating along at least one in-plane direction, the molecular axis of the liquid crystal compound is tilted with respect to the main plane of the cholesteric liquid crystal layer, and an arrangement direction of bright portions and dark portions derived from the cholesteric liquid crystalline phase, as observed under a scanning electron microscope in a cross section perpendicular to the main plane, is tilted with respect to the main plane of the cholesteric liquid crystal layer.

公开(公告)号：US20180297058A1

公开(公告)日：2018-10-18

申请号：US16016546

申请日：2018-06-23

Applicant: The Regents of the University of California

Inventor： Alon Gorodetsky ,  Long Phan ,  David Ordinario ,  Emil Karshalev ,  Michael Shenk ,  Ward Gale Walkup, IV

IPC: B05D3/10 ,  G02B5/08 ,  B32B5/02 ,  C09D189/00 ,  G02B5/26 ,  G02B1/10 ,  B32B9/02 ,  B05D1/00 ,  B05D1/02 ,  B05D3/12 ,  B05D5/06

CPC classification number: B05D3/107 ,  B05D1/005 ,  B05D1/02 ,  B05D3/12 ,  B05D5/063 ,  B05D2203/00 ,  B05D2401/10 ,  B32B5/02 ,  B32B5/022 ,  B32B5/024 ,  B32B5/026 ,  B32B9/02 ,  B32B2307/416 ,  C09D189/00 ,  G02B1/10 ,  G02B5/0841 ,  G02B5/26 ,  Y10T428/2848 ,  Y10T428/3154

Abstract: Reflectin proteins are proteins derived from cephalopods (certain species of squid) which have unusual optical properties. Disclosed herein are thin films of reflectin proteins which can be tuned to reflect infrared light. Advantageously, the films can be tuned dynamically over short time scales, to reflect at different wavelengths. Disclosed herein are novel infrared-reflective coatings, methods of making such coatings, and infrared-reflective objects such as textiles, building materials, and camouflage materials.

公开(公告)号：US09995861B2

公开(公告)日：2018-06-12

申请号：US13878625

申请日：2011-10-14

Applicant: William D. Coggio ,  William B. Black ,  Michael F. Weber ,  Huiwen Tai

Inventor： William D. Coggio ,  William B. Black ,  Michael F. Weber ,  Huiwen Tai

IPC: G02B5/02 ,  G02B5/08 ,  G02B5/28

CPC classification number: G02B5/285 ,  G02B5/0242 ,  G02B5/0247 ,  G02B5/0841

Abstract: Low loss, high reflectivity wide band mirror films provide a desired mix of specular reflection and diffuse reflection or scattering to provide semi-specular reflectivity. The mirror films generally include both a specularly reflective multilayer optical film (MOF) having a wide reflection band, and a scattering layer. In some cases a low refractive index TIR layer is sandwiched between the MOF and the scattering layer. In other cases the scattering layer contacts the MOF directly. In embodiments that include the TIR layer, the TIR layer preferably has a nanovoided morphology and includes a plurality of particles and a polymer binder. In embodiments wherein the scattering layer contacts the MOF directly, the scattering layer preferably also has a nanovoided morphology and includes a plurality of particles and a polymer binder.

公开(公告)号：US09964677B2

公开(公告)日：2018-05-08

申请号：US14661803

申请日：2015-03-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： William W. Merrill ,  Douglas S. Dunn ,  Przemyslaw Pawel Markowicz

IPC: G02B27/28 ,  G02B5/30 ,  G02B5/08 ,  G02B5/28 ,  B42D25/23 ,  B42D25/24 ,  B42D25/391 ,  G02F1/1335 ,  G02F1/13363

CPC classification number: G02B5/3041 ,  B42D25/23 ,  B42D25/24 ,  B42D25/391 ,  G02B5/0816 ,  G02B5/0841 ,  G02B5/285 ,  G02B5/287 ,  G02B5/30 ,  G02B5/305 ,  G02B5/3083 ,  G02B27/28 ,  G02F1/133536 ,  G02F1/13363 ,  G02F2001/133521 ,  Y10T428/24942

Abstract: A reflective film includes a first optical stack that provides a first reflective characteristic and a second optical stack that provides a second reflective characteristic. The optical stacks also have first and second absorptive characteristics that are suitable to absorptively heat the respective stacks upon exposure to light including a write wavelength while maintaining the structural integrity of the stacks. The absorptive heating can change the first and second reflective characteristics to third and fourth reflective characteristics, respectively. A blocking layer that at least partially blocks light of the write wavelength may also be provided between the optical stacks to permit absorptive heating of any selected one of the optical stacks. The reflective characteristics of the optical stacks can thus be independently modified in any desired patterns by appropriate delivery of light beams that include the write wavelength.

公开(公告)号：US09945994B2

公开(公告)日：2018-04-17

申请号：US14415967

申请日：2013-07-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Timothy J. Hebrink ,  Craig R. Schardt

IPC: G02B5/22 ,  G02B19/00 ,  G02B5/20 ,  G02B5/26 ,  G02B5/28 ,  G02C7/10 ,  G02B5/08 ,  F21V8/00

CPC classification number: G02B5/223 ,  G02B5/0841 ,  G02B5/208 ,  G02B5/22 ,  G02B5/26 ,  G02B5/283 ,  G02B6/005 ,  G02B6/0065 ,  G02B19/0042 ,  G02C7/10

Abstract: Assemblies comprising multi-layer optical film comprising optical layers reflecting incident UV and blue light over specified wavelength ranges. Embodiments of the multi-layer optical films are useful, for example, as a UV protective covering. An exemplary UV stable assembly comprises a multi-layer optical film comprising at least a first plurality of first and second optical layers reflecting at least 50 percent of incident UV light over at least a 30 nanometer wavelength range in a wavelength range from at least 300 nanometers to 400 nanometers, and a second plurality of first and second optical layers reflecting at least 50 percent of incident light over at least 30 nanometer wavelength in a wavelength range from at least 430 nanometers to 500 nanometers.

公开(公告)号：US20170329060A1

公开(公告)日：2017-11-16

申请号：US15666648

申请日：2017-08-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Huiwen Tai

IPC: G02B5/08 ,  B32B27/08 ,  G02B19/00 ,  G02B5/30

CPC classification number: G02B5/0841 ,  B32B27/08 ,  B32B2250/05 ,  B32B2250/24 ,  B32B2250/42 ,  B32B2307/416 ,  G02B5/305 ,  G02B5/3083 ,  G02B19/0019 ,  G02B19/0042

Abstract: A multilayer polymeric reflector is provided which comprises: a) a plurality of first optical layers, each first optical layer comprising a polyester having terephthalate comonomer units and ethylene glycol comonomer units, the polyester having a glass transition temperature, where each first optical layer is oriented, and b) a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers, each second optical layer comprising a blend of polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF), where the blend has a glass transition temperature less than the glass transition temperature of the polyester comprising the first optical layers, and where the amount of PVDF in the PMMA/PVDF blend is greater than and not equal to about 40% and not more than about 65%. Articles comprising the multilayer polymeric reflector are also provided.

公开(公告)号：US09562996B2

公开(公告)日：2017-02-07

申请号：US13844664

申请日：2013-03-15

Applicant: 3M Innovative Properties Company

Inventor： Edward J. Kivel ,  Timothy J. Nevitt ,  Michael F. Weber

IPC: G02B5/08 ,  G02B5/28 ,  G02B5/30 ,  G02B27/14

CPC classification number: G02B5/0841 ,  G02B5/281 ,  G02B5/285 ,  G02B5/287 ,  G02B5/3041 ,  G02B5/305 ,  G02B27/142

Abstract: A broadband mirror, polarizer, or other reflector includes separate stacks of microlayers. Microlayers in each stack are arranged into optical repeat units, and the stacks are arranged in series. At a design angle of incidence such as normal incidence, the second stack provides a second 1st order reflection band and a distinct second 2nd order reflection band with a second spectral pass band therebetween. The first stack provides a first 1st order reflection band that fills the second spectral pass band such that a single wide reflection band is formed that includes the first 1st order reflection band, the second 1st order reflection band, and the second 2nd order reflection band. In some cases, the single wide reflection band can include a first 2nd order reflection band of the first stack. In some cases, the first and second stacks may have apodized portions which monotonically deviate from respective baseline portions.

Abstract translation: 宽带镜，偏振器或其他反射器包括单独的微层堆叠。 每个堆叠中的微层被布置成光学重复单元，并且堆叠被串联布置。 在诸如法向入射的设计入射角下，第二堆叠提供第二第一级反射带和不同的第二二级反射带，其间具有第二光谱通过带。 第一叠层提供填充第二光谱通带的第一第一级反射带，使得形成包括第一第一级反射带，第二第一级反射带和第二二级反射带的单个宽反射带。 在一些情况下，单个宽反射带可以包括第一叠层的第一二阶反射带。 在一些情况下，第一和第二堆叠可以具有与各个基准部分单调偏离的变迹部分。

公开(公告)号：US20160245965A1

公开(公告)日：2016-08-25

申请号：US15031821

申请日：2014-11-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Huiwen Tai

IPC: G02B5/08 ,  G02B19/00

CPC classification number: G02B5/0841 ,  B32B27/08 ,  B32B2250/05 ,  B32B2250/24 ,  B32B2250/42 ,  B32B2307/416 ,  G02B5/305 ,  G02B5/3083 ,  G02B19/0019 ,  G02B19/0042

Abstract: A multilayer polymeric reflector is provided which comprises: a) a plurality of first optical layers, each first optical layer comprising a polyester having terephthalate comonomer units and ethylene glycol comonomer units, the polyester having a glass transition temperature, where each first optical layer is oriented, and b) a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers, each second optical layer comprising a blend of polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF), where the blend has a glass transition temperature less than the glass transition temperature of the polyester comprising the first optical layers, and where the amount of PVDF in the PMMA/PVDF blend is greater than and not equal to about 40% and not more than about 65%. Articles comprising the multilayer polymeric reflector are also provided.

Abstract translation: 提供一种多层聚合物反射体，其包括：a）多个第一光学层，每个第一光学层包含具有对苯二甲酸酯共聚单体单元和乙二醇共聚单体单元的聚酯，所述聚酯具有玻璃化转变温度，其中每个第一光学层取向 和b）与所述多个第一光学层重复排列的多个第二光学层，每个第二光学层包含聚甲基丙烯酸甲酯（PMMA）和聚偏二氟乙烯（PVDF）的混合物，其中所述共混物具有玻璃化转变 温度低于包含第一光学层的聚酯的玻璃化转变温度，并且其中PMMA / PVDF共混物中的PVDF的量大于且不等于约40％且不大于约65％。 还提供了包含多层聚合物反射体的制品。