OPTICALLY ANISOTROPIC FILM, CIRCULARLY POLARIZING PLATE, AND DISPLAY DEVICE

    公开(公告)号:US20230273361A1

    公开(公告)日:2023-08-31

    申请号:US17949701

    申请日:2022-09-21

    CPC classification number: G02B5/3091 G02B5/208 G02B5/305

    Abstract: An optically anisotropic film exhibiting reverse wavelength dispersibility and an Nz factor of about 0.50 (0.40 to 0.60), is formed of a lyotropic liquid crystalline composition containing colorable rod-like and plate-like compounds, where a measurement to obtain an ultraviolet-visible absorption spectrum by applying linearly polarized light is carried out by changing light direction and assuming that an absorbance at a maximum absorption wavelength in a wavelength range of 230 to 400 nm of the rod-like compound is highest at a first direction, and of the plate-like compound is highest at a second direction, the first direction and the second direction are orthogonal to each other, the maximum absorption wavelength in a wavelength range of 230 to 400 nm of the rod-like compound is smaller than that of the plate-like compound, and NzP represented by Expression (N) NzP = (nxP - nzP)/(nxP - nyP) of the plate-like compound is negative.

    OPTICALLY ANISOTROPIC FILM, CIRCULARLY POLARIZING PLATE, AND DISPLAY DEVICE

    公开(公告)号:US20230057804A1

    公开(公告)日:2023-02-23

    申请号:US17949689

    申请日:2022-09-21

    Abstract: Provided is an optically anisotropic film having favorable black tightness when the optically anisotropic film is disposed on a display element as a circularly polarizing plate in combination with a polarizer and an obtained display device is viewed from an oblique direction; as well as a circularly polarizing plate and a display device. The optically anisotropic film is formed of a composition containing a non-colorable lyotropic liquid crystal compound, in which an Nz factor of the optically anisotropic film satisfies a relationship of Expression (1) 0.40≤Nz factor≤0.60 and the optically anisotropic film satisfies a relationship of Expression (2) 0.60≤Re(450)/Re(550)≤0.90. In Expressions (1) and (2) Re(450) represents an in-plane retardation of the optically anisotropic film at a wavelength of 450 nm, and Re(550) represents the in-plane retardation of the optically anisotropic film at a wavelength of 550 nm.

    FINGERPRINT RECOGNITION SENSOR AND OPTICAL ELEMENT

    公开(公告)号:US20250005959A1

    公开(公告)日:2025-01-02

    申请号:US18828794

    申请日:2024-09-09

    Abstract: A sensor including a light-receiving element; and an optical element that includes near infrared absorbing dichroic substance. The optical element has an absorption axis with respect to near infrared light in an in-plane direction. When linearly polarized light of near infrared light orthogonal to the absorption axis is radiated from a normal direction of the optical element and from a direction inclined by 45° from the normal direction at an azimuthal angle orthogonal to the absorption axis, an absorbance during the radiation from the direction inclined by 45° from the normal direction is more than an absorbance during the radiation from the normal direction.

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