公开(公告)号：US11287559B2

公开(公告)日：2022-03-29

申请号：US17159371

申请日：2021-01-27

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: F21V8/00

Abstract: A unitary lightguide including a first lightguide section extending along a first direction and a second lightguide section extending along a second direction is described. The second lightguide section includes a plurality of light extractors for extracting light that would otherwise propagate within and along the second lightguide section. The unitary lightguide includes a boundary region disposed between and joining the first and second lightguide sections and including a plurality of spaced apart light redirecting features. Each light redirecting feature includes a first portion extending substantially parallel to the first direction, and a second portion extending from proximate the first end of the first portion toward the second lightguide section and making an angle with the first portion in a range from about 10 degrees to about 70 degrees.

公开(公告)号：US11209589B2

公开(公告)日：2021-12-28

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: B60K35/00 ,  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.

公开(公告)号：US20210157044A1

公开(公告)日：2021-05-27

申请号：US16629595

申请日：2018-07-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: F21V8/00

Abstract: An optical system includes a lightguide having opposing top and bottom major surfaces. A round through opening extends between the two surfaces of the lightguide. An elongated channel is formed in one of the surfaces and at least partially surrounds and is substantially concentric with the opening. The channel has a depth (d) that varies along its length. Light extractors extract light that would otherwise propagate within and along the lightguide. The features of the lightguide can be varied to optimize performance of the lightguide for various purposes.

公开(公告)号：US20180231708A1

公开(公告)日：2018-08-16

申请号：US15751213

申请日：2016-08-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: F21V8/00

CPC classification number: G02B6/0036 ,  G02B6/006 ,  G02B6/0065 ,  G02B6/0068

Abstract: Lightguides including pixelated images, and methods of making the lightguides are provided. The lightguides include an image formed on a major side which is illuminated for directly viewing. The image includes an elongated portion being pixelated into an array of pixels. Each of the pixels includes a single light extracting structure adapted to receive the propagating light within the lightguide along the optical axis and extract the received light transversely out of the lightguide.

公开(公告)号：US11314008B2

公开(公告)日：2022-04-26

申请号：US16629595

申请日：2018-07-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: F21V8/00

Abstract: An optical system includes a lightguide having opposing top and bottom major surfaces. A round through opening extends between the two surfaces of the lightguide. An elongated channel is formed in one of the surfaces and at least partially surrounds and is substantially concentric with the opening. The channel has a depth (d) that varies along its length. Light extractors extract light that would otherwise propagate within and along the lightguide. The features of the lightguide can be varied to optimize performance of the lightguide for various purposes.

公开(公告)号：US20200233135A1

公开(公告)日：2020-07-23

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.

公开(公告)号：US10649274B2

公开(公告)日：2020-05-12

申请号：US14865892

申请日：2015-09-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Encai Hao ,  Fei Lu ,  William Blake Kolb ,  Brian W. Ostlie ,  Adam D. Haag ,  Michael Benton Free ,  William D. Coggio ,  Michael L. Steiner ,  Soemantri Widagdo ,  Kui Chen-Ho ,  Lan H. Liu ,  Robert F. Kamrath ,  Scott M. Tapio ,  John A. Wheatley ,  Charles D. Hoyle ,  Michael F. Weber

IPC: G02B5/02 ,  G02F1/13357 ,  G02B5/30 ,  G02F1/1335 ,  F21V8/00

Abstract: Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.

公开(公告)号：US10935713B2

公开(公告)日：2021-03-02

申请号：US16624626

申请日：2018-06-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

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

IPC: F21V8/00

Abstract: A unitary lightguide including a first lightguide section extending along a first direction and a second lightguide section extending along a second direction is described. The second lightguide section includes a plurality of light extractors for extracting light that would otherwise propagate within and along the second lightguide section. The unitary lightguide includes a boundary region disposed between and joining the first and second lightguide sections and including a plurality of spaced apart light redirecting features. Each light redirecting feature includes a first portion extending substantially parallel to the first direction, and a second portion extending from proximate the first end of the first portion toward the second lightguide section and making an angle with the first portion in a range from about 10 degrees to about 70 degrees.

公开(公告)号：US10718890B2

公开(公告)日：2020-07-21

申请号：US16080755

申请日：2017-02-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Brian W. Ostlie ,  Tao Liu ,  Del R. Lawson ,  Brent A. Hedding ,  James A. Phipps ,  Jeffrey J. Pederson

IPC: G02B6/02 ,  F21V8/00 ,  B60Q1/26 ,  B60Q3/64 ,  B60Q3/217

Abstract: A lightguide includes features for extracting light that would otherwise be confined and propagate within the lightguide primarily by total internal reflection. A first portion of light propagating within the lightguide and extracted exits the lightguide through a first area of the lightguide having an optical reflectance of at least 30% and an optical transmittance of at least 5% for normally incident light at a wavelength of the extracted light. A second portion of light propagating within the lightguide and extracted exits the lightguide through a different second area of the lightguide having an optical transmittance of at least 80% for normally incident light at the wavelength of the extracted light.

公开(公告)号：US10514487B2

公开(公告)日：2019-12-24

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.