公开(公告)号：US20230418079A1

公开(公告)日：2023-12-28

申请号：US18037412

申请日：2021-12-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Shine Long ,  Xue Mao ,  Jingfei Chen ,  Bharat R. Acharya ,  Huijie Xie ,  Zhiping Liu ,  Zhe Hu

IPC: G02B27/02 ,  G06V40/13 ,  G06V40/145 ,  G06V40/16 ,  G02B27/30 ,  G02B5/26 ,  G02B5/20

CPC classification number: G02B27/022 ,  G06V40/1318 ,  G06V40/145 ,  G06V40/166 ,  G02B27/30 ,  G02B5/26 ,  G02B5/208 ,  G02B5/201

Abstract: A display system for imaging a user body portion includes a display panel, an optical sensor disposed on the display panel and configured to detect light reflected by the user body portion, and an optical stack disposed between the display panel and the optical sensor. The optical stack includes a first optical reflector and a light collimating film. The light collimating film includes a plurality of substantially coplanar alternating first and second regions. For an incident light, a visible wavelength range, and an infrared wavelength range, and for each of a first incident angle of less than about 5 degrees and a second incident angle of between about 40 degrees and about 70 degrees, the plurality of polymeric layers has an average optical reflectance of greater than about 70% in the visible wavelength range and an optical transmittance of greater than about 30% in the infrared wavelength range.

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：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).