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    Lightguide having recess of varying depth
    31.
    发明授权
    Lightguide having recess of varying depth 有权

    公开(公告)号：US11199654B2

    公开(公告)日：2021-12-14

    申请号：US16632471

    申请日：2018-08-01

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Yongshang Lu ,  David C. Mercord ,  Brian W. Ostlie

    IPC: F21V8/00

    Abstract: An optical system comprises a lightguide having an elongated recess formed therein. The recess divides the lightguide into a first lightguide section a second larger lightguide section. Light extractors are disposed in the second, but not the first, lightguide section for extracting light that would otherwise propagate within and along the second lightguide section via total internal reflection (TIR). The depth of the recess varies along its length. The inclusion of a recess having a depth that varies along its length provides design flexibility in the number and location of light source(s) used by the optical system.

    Display system
    32.
    发明授权
    Display system 有权

    公开(公告)号：US11125929B2

    公开(公告)日：2021-09-21

    申请号：US16463078

    申请日：2018-01-08

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Brian W. Ostlie ,  Brent A. Hedding ,  Charlie C. Ho ,  Yongshang Lu ,  Jay M. Jennen ,  David C. Mercord ,  Johnnie L. Williams

    IPC: F21V8/00

    Abstract: A display system including a lightguide and first and second reflective layers disposed on opposite sides of the lightguide is provided. The lightguide has opposing first and second major surfaces and includes a light extraction pattern for extracting light that would otherwise be confined and propagate within the lightguide primarily by total internal reflection. Light extracted by the light extraction pattern exits the lightguide through at least one of the first and second major surfaces of the lightguide. Each of the first and second reflective layers has an average specular reflectance of at least 50% in a predetermined wavelength range. The light extraction pattern may be repeatedly imaged by the first and second reflective layers to produce three-dimensional stacked images of the light extraction pattern.

    OPTICAL IMAGING SYSTEM
    34.
    发明申请
    OPTICAL IMAGING SYSTEM 审中-公开

    公开(公告)号：US20200073041A1

    公开(公告)日：2020-03-05

    申请号：US16466054

    申请日：2017-11-28

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Brent A. Hedding ,  David C. Mercord ,  Brian W. Ostlie

    IPC: F21V8/00

    Abstract: An optical imaging system (100) including an elongated lightguide (105) having pluralities of first and second light extractors (110) forming respective first and second patterns along the length of the lightguide is described. Light extracted by the first light extractors exit the lightguide primarily along a first direction toward a target location (150), and light extracted by the second light extractors exit the lightguide primarily along a second direction different from the first direction. The optical imaging system includes a first reflector (114) for receiving light exiting the lightguide primarily along the second direction and reflecting the received light toward the target location. The first reflector forms a first virtual image (132) of the second pattern behind the first reflector. The first pattern and the first virtual image are visible to a viewer (152) viewing the optical imaging system from the target location.

    LIGHT GUIDES
    36.
    发明申请
    LIGHT GUIDES 审中-公开

    公开(公告)号：US20180329128A1

    公开(公告)日：2018-11-15

    申请号：US15774705

    申请日：2016-12-06

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Brian W. Ostlie ,  Brent A. Hedding ,  David C. Mercord ,  Bradley J. Johanson

    IPC: F21V8/00

    Abstract: Light guide assemblies including first, second and third light guides, a first optical coupling component disposed between and attached to the first and second light guides, and a second optical coupling component disposed between and attached to the second and third light guides are described. The first optical coupling component is adapted to couple light between the first and second light guides, and the second optical coupling component is adapted to couple light the between second and third light guides. The first light guide, the second light guide and the first optical coupling component are coextensive over a first region of the assembly, and the second light guide, the third light guide and the second optical coupling component are coextensive over a different second region of the assembly.

    ILLUMINATION SYSTEM INCLUDING LIGHTGUIDE
    37.
    发明申请
    ILLUMINATION SYSTEM INCLUDING LIGHTGUIDE 审中-公开

    公开(公告)号：US20170357040A1

    公开(公告)日：2017-12-14

    申请号：US15523949

    申请日：2015-11-04

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Mark E. Napierala

    IPC: F21V8/00 ,  B60Q1/24

    Abstract: Various embodiments of lightguides and illumination systems that include lightguides are disclosed. In one or more embodiments, a lightguide can include first and second light extractors (330,340) that extract light that would otherwise be confined and propagate within the lightguide along the length of the lightguide primarily by total internal reflection. The first and second light extractors can form respective first and second patterns along a length of the lightguide. Light extracted by the first light extractors can exit the lightguide primarily along a first direction (306). Light extracted by the second light extractors can exit the lightguide primarily along a second direction (308) different from the first direction. A brightness of the total light extracted by the first light extractors can be larger than a brightness of the total light extracted by the second light extractors.

    LIGHT SOURCE INCORPORATING MULTILAYER OPTICAL FILM
    38.
    发明申请
    LIGHT SOURCE INCORPORATING MULTILAYER OPTICAL FILM 审中-公开
    光源包含多层光学膜

    公开(公告)号：US20160370534A1

    公开(公告)日：2016-12-22

    申请号：US15117256

    申请日：2015-02-26

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  William W. Merrill ,  Mark E. Napierala ,  David T. Yust

    IPC: F21V8/00 ,  F21S8/10 ,  G02B5/28 ,  G02B5/30 ,  G02B5/13 ,  G02B5/124

    CPC classification number: G02B6/0053 ,  F21S43/239 ,  F21S43/245 ,  G02B1/08 ,  G02B5/124 ,  G02B5/13 ,  G02B5/28 ,  G02B5/3083 ,  G02B6/0001 ,  G02B6/0031 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/006 ,  G02B6/0068

    Abstract: A light source includes a lightguide having a top side comprising an optical film, a bottom side comprising a diffuse reflector, and an input side extending between the top and bottom sides. An illumination source is disposed proximate the input side of the lightguide. The optical film has adjacent first and second zones, each zone extending substantially an entire thickness of the optical stack or an entire thickness of at least one optical packet of the optical film. Light enters the lightguide from the light source propagating within the lightguide and being either reflected or transmitted by the optical film primarily by optical interference. For at least one first incidence angle and at least one wavelength, the first and second zones of the optical film have substantially equal optical transmittance. For at least one second incidence angle and at least one wavelength, the second zone has substantially greater optical transmittance than the first zone of the optical film.

    Abstract translation: 光源包括具有包括光学膜的顶侧的光导，包括漫反射器的底侧和在顶侧和底侧之间延伸的输入侧。 照明源设置在光导的输入侧附近。 光学薄膜具有相邻的第一和第二区域，每个区域基本上延伸光学叠层的整个厚度或光学薄膜的至少一个光学分组的整个厚度。 光从光源中传播的光源进入光导，并且主要通过光学干涉被光学膜反射或透射。 对于至少一个第一入射角和至少一个波长，光学膜的第一和第二区具有基本相等的光透射率。 对于至少一个第二入射角和至少一个波长，第二区具有比光学膜的第一区大得多的光透射率。

    Semispecular hollow backlight with gradient extraction
    40.
    发明授权
    Semispecular hollow backlight with gradient extraction 有权
    半球形空心背光与梯度提取

    公开(公告)号：US08807774B2

    公开(公告)日：2014-08-19

    申请号：US14024926

    申请日：2013-09-12

    Applicant: 3M Innovative Properties Company

    Inventor： John A. Wheatley ,  Tao Liu

    IPC: G09F13/04

    CPC classification number: G09F13/04 ,  G02B6/0035 ,  G02B6/0058 ,  G02B6/0096 ,  G02F1/133605 ,  G02F1/133606 ,  G02F1/133615 ,  G02F1/13362 ,  G09F13/14

    Abstract: A backlight that includes a front reflector and a back reflector that form a hollow light recycling cavity including an output surface is disclosed. The backlight also includes a semi-specular element, and a light extraction element disposed within the hollow cavity. The light extraction element has a gradient specularity. The backlight also includes one or more light sources disposed to inject light into the hollow light recycling cavity, where the one or more light sources are configured to inject light over a limited angular range.

    Abstract translation: 公开了一种包括形成包括输出表面的中空光循环腔的前反射器和后反射器的背光源。 背光还包括半镜面元件和设置在中空腔内的光提取元件。 光提取元件具有梯度镜面。 背光还包括设置成将光注入中空光循环腔中的一个或多个光源，其中一个或多个光源被配置为在有限的角度范围内注入光。

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