Optical sensor systems
    1.
    发明授权

    公开(公告)号:US11354880B2

    公开(公告)日:2022-06-07

    申请号:US16758769

    申请日:2018-10-25

    摘要: Systems, assemblies, and methods for detecting changes in polarization states are described. Example systems may include a light receiving unit including a sensor and a receiving polarizer. The sensor is configured to sense light from a polarized light source deflected through the receiving polarizer by a light directing article. The sensor is configured to generate a signal indicative a received polarization state of light deflected by the light directing articles. Such systems may be coupled to vehicles and may be useful for sensor-detectable signs, indicia, and markings to facilitate automated or assisted vehicular transport.

    OPTICAL SENSOR SYSTEMS
    4.
    发明申请

    公开(公告)号:US20200257915A1

    公开(公告)日:2020-08-13

    申请号:US16758769

    申请日:2018-10-25

    IPC分类号: G06K9/20 H04B10/61 H04B10/116

    摘要: Systems, assemblies, and methods for detecting changes in polarization states are described. Example systems may include a light receiving unit including a sensor and a receiving polarizer. The sensor is configured to sense light from a polarized light source deflected through the receiving polarizer by a light directing article. The sensor is configured to generate a signal indicative a received polarization state of light deflected by the light directing articles. Such systems may be coupled to vehicles and may be useful for sensor-detectable signs, indicia, and markings to facilitate automated or assisted vehicular transport.

    Backlight for display
    6.
    发明授权

    公开(公告)号:US11921373B2

    公开(公告)日:2024-03-05

    申请号:US17797480

    申请日:2021-02-01

    IPC分类号: G02F1/13357 G02F1/1335

    摘要: A backlight includes an extended light source adapted to emit light. A reflective polarizer is disposed on the extended light source, such that for substantially normally incident light and for at least a first wavelength in a range from about 420 nanometer (nm) to about 650 nm, the reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state. A first prismatic film is disposed between the extended light source and the reflective polarizer. A retarder layer is disposed between the reflective polarizer and the first prismatic film, such that for substantially normally incident light at a wavelength of about 550 nm, the retarder layer has a retardance nW, where n is an integer ≥1 and W is a wavelength between about 160 nm and about 300 nm.