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    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES
    51.
    发明申请
    SINGLE PACKET REFLECTIVE POLARIZER WITH THICKNESS PROFILE TAILORED FOR LOW COLOR AT OBLIQUE ANGLES 有权

    公开(公告)号：US20210341660A1

    公开(公告)日：2021-11-04

    申请号：US17305867

    申请日：2021-07-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Timothy J. Nevitt ,  Carl A. Stover ,  Gilles J. Benoit ,  Kristopher J. Derks ,  Zhaohui Yang

    IPC: G02B5/30 ,  B32B7/023 ,  B29D11/00 ,  B32B27/08 ,  B32B27/36

    Abstract: Multilayer optical film reflective polarizers previously considered to have excessive off-axis color can provide adequate performance in an LC display in an “on-glass” configuration, laminated to a back absorbing polarizer of the display, without any light diffusing layer or air gap in such laminate. The reflective polarizer is a tentered-one-packet (TOP) multilayer film, having only one packet of microlayers, and oriented using a standard tenter such that birefringent microlayers in the film are biaxially birefringent. The thickness profile of optical repeat units (ORUs) in the microlayer packet is tailored to avoid excessive perceived color at normal and oblique angles. Color at high oblique angles in the white state of the display is reduced by positioning thicker ORUs closer to the absorbing polarizer, and by ensuring that, with regard to a boxcar average of the ORU thickness profile, the average slope from an ORU(600) to an ORU(645) does not exceed 1.8 times the average slope from an ORU(450) to the ORU(600).

    OPTICAL FILM AND OPTICAL SYSTEM
    52.
    发明申请
    OPTICAL FILM AND OPTICAL SYSTEM 有权

    公开(公告)号：US20210286113A1

    公开(公告)日：2021-09-16

    申请号：US16500517

    申请日：2018-05-22

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Zhaohui Yang ,  Brett J. Sitter ,  James A. Thielen ,  Nathaniel K. Naismith

    IPC: G02B5/18

    Abstract: A multilayer optical film including a first layer having an index of refraction n1 at a wavelength λ in a range from about 580 nm to about 650 nm, and a second layer having an index of refraction n2 at λ is described. The first and second layers define an interface therebetween comprising a two-dimensional grating. The grating may have an average height H such that |n1−n2|*H is in a range from 0.24 micrometers to 0.3 micrometers. Optical systems including the multilayer optical film are described. A subpixel in a display surface of the optical system may be diffracted into a zero diffraction order and a plurality of first diffraction orders where the intensities of the zero and first diffraction orders are with 10% of each other at λ. The optical system may have a modulation transfer function greater than 0.4 at 10 line pairs per millimeter.

    OPTICAL CONSTRUCTION INCLUDING LENS FILM AND MASK LAYER
    56.
    发明申请
    OPTICAL CONSTRUCTION INCLUDING LENS FILM AND MASK LAYER 有权

    公开(公告)号：US20250035823A1

    公开(公告)日：2025-01-30

    申请号：US18716565

    申请日：2022-11-29

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kundapur Raveesh Shenoy ,  Tri D. Pham ,  Charles J. Studiner ,  Zhaohui Yang ,  Martin E. Denker ,  Neeraj Sharma ,  Jung-Sheng Wu

    IPC: G02B3/00 ,  G02B5/00

    Abstract: An optical construction includes a lens film having an outermost structured first major surface and an opposing outermost substantially planar second major surface. The first major surface includes a plurality of microlenses. A radiation cured optically opaque mask layer is disposed on the second major surface of the lens film. The mask layer has an average thickness of less than about 10 microns and defines a plurality of laser-ablated through openings therein. The through openings are aligned to the microlenses in a one-to-one correspondence, such that for a light incident on the structured first major surface along an incident direction forming an incident angle with the second major surface, an optical transmittance of the optical construction as a function of a transmitted angle includes a first transmitted peak having a first peak transmittance T1≥40%. The first transmitted peak can be within about 10 degrees of the incident angle.

    Optical constructions for display systems
    57.
    发明授权
    Optical constructions for display systems 有权

    公开(公告)号：US12094238B2

    公开(公告)日：2024-09-17

    申请号：US18195475

    申请日：2023-05-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Kristy A. Gillette ,  Zhaohui Yang ,  Encai Hao ,  William J. Gray

    IPC: G06K9/00 ,  G02B3/00 ,  G02B5/00 ,  G02B5/20 ,  G06V40/13

    CPC classification number: G06V40/1324 ,  G02B3/0056 ,  G02B5/003 ,  G02B5/208

    Abstract: An integral optical construction includes a lens layer including a structured first major surface having a plurality of microlenses. An optically opaque mask layer is disposed on the lens layer and defines a plurality of openings. Each of the openings extends from a first major surface of the mask layer facing the lens layer to an opposite second major surface of the mask layer. The openings are in a one-to-one correspondence with the microlenses. Regions of the mask layer between the openings have an optical density of greater than about 2 for at least a first visible wavelength in a visible wavelength range. An optical adhesive layer is disposed on, and makes physical contact with, the second major surface of the mask layer. The optical adhesive layer defines a recess at each of the openings. The recess includes a closed bottom and an opposite open top open to the opening.

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