Sheet and an optical fingerprint scanner

    公开(公告)号:US11126818B2

    公开(公告)日:2021-09-21

    申请号:US16760884

    申请日:2018-10-11

    申请人: LG CHEM, LTD.

    IPC分类号: G06K9/00

    摘要: The present application relates to a sheet comprising, in a single layer, a first light control part capable of providing light always totally reflected only in a specific interlayer laminate structure among sheet constructions; and a second light control part capable of providing light whose total reflection is determined according to a fingerprint pattern in contact with the surface layer of the sheet by changing a part of the light provided from the first light control part and totally reflected in the specific interlayer laminate structure at a predetermined angle and emitting it to reach the surface layer of the sheet without being totally reflected in the specific interlayer laminate structure, and a device thereof. The sheet has excellent user identification or authentication capability through a fingerprint and can be applied to a large area display device to recognize a plurality of fingerprint patterns without being influenced by each other.

    OPTICAL FILM
    3.
    发明申请

    公开(公告)号:US20210167334A1

    公开(公告)日:2021-06-03

    申请号:US16772933

    申请日:2018-12-26

    申请人: LG CHEM, LTD.

    IPC分类号: H01L51/52 G02B5/32

    摘要: The present application provides an optical film including a refractive index changing unit region comprising at least one high-refraction unit region and at least one low-refraction unit region, the refractive index changing unit region in which a refractive index varies along the plane direction, and the optical film having excellent abrasion resistance and pressure resistance while having excellent light extraction efficiency.

    Method for Controlling a Digital Device
    8.
    发明申请

    公开(公告)号:US20190286871A1

    公开(公告)日:2019-09-19

    申请号:US16347727

    申请日:2017-11-30

    申请人: LG Chem, Ltd.

    摘要: A method for controlling a digital device according to the present application can control the device so as to execute a command corresponding to a single fingerprint or a plurality of fingerprints using a sheet capable of simultaneously recognizing a plurality of fingerprints. Accordingly, a user's usability can be greatly improved, and a complicated encryption function using a plurality of fingerprints can be implemented, so that the security of the digital device can be greatly improved.

    Optical film
    9.
    发明授权

    公开(公告)号:US11903243B2

    公开(公告)日:2024-02-13

    申请号:US16772933

    申请日:2018-12-26

    申请人: LG CHEM, LTD.

    IPC分类号: G02B5/32 H10K50/858

    CPC分类号: H10K50/858 G02B5/32

    摘要: An optical film including a refractive index changing unit region comprising at least one high-refraction unit region and at least one low-refraction unit region, the refractive index changing unit region in which a refractive index varies along the plane direction, is provided. The optical film has excellent abrasion resistance and pressure resistance while having excellent light extraction efficiency.