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    HEAD-UP DISPLAY SYSTEM HAVING A HOLOGRAPHIC PANEL COMPRISING A FIRST LAYER AND A SECOND LAYER
    45.
    发明公开
    HEAD-UP DISPLAY SYSTEM HAVING A HOLOGRAPHIC PANEL COMPRISING A FIRST LAYER AND A SECOND LAYER 审中-公开

    公开(公告)号：US20230302899A1

    公开(公告)日：2023-09-28

    申请号：US17700916

    申请日：2022-03-22

    Applicant: GM Global Technology Operations LLC

    Inventor： Kai-Han Chang ,  Thomas A. Seder

    IPC: B60K35/00

    CPC classification number: B60K35/00 ,  B60K2370/1529 ,  B60K2370/1526 ,  B60K2370/29 ,  B60K2370/785 ,  B60Y2200/11 ,  B60K2370/333

    Abstract: A head-up display system of a vehicle visually transmits information to eyes of a first occupant and eyes of a second occupant. The system includes an illumination device emitting first and second display lights having first and second polarizations, respectively. The system includes a windshield and a holographic panel including first and second layers. The display lights emit toward the holographic panel at an entrance angle relative to an axis normal to the holographic panel. The first layer diffracts the first display light having the first polarization in a first exit direction at a first exit angle relative to the axis toward the eyes of the first occupant. The second layer diffracts the second display light having the second polarization in a second exit direction at a second exit angle relative to the axis, and different than the first exit angle, toward the eyes of the second occupant.

    POLARIZATION ADAPTIVE WAVEGUIDE HUD
    47.
    发明申请
    POLARIZATION ADAPTIVE WAVEGUIDE HUD 有权

    公开(公告)号：US20230091935A1

    公开(公告)日：2023-03-23

    申请号：US17481900

    申请日：2021-09-22

    Applicant: GM Global Technology Operations LLC

    Inventor： Thomas A. Seder ,  Kai-Han Chang

    IPC: G02B27/01 ,  G03H1/00 ,  G02B5/30

    Abstract: A head-up display system includes a hologram projector adapted to project a holographic image, a waveguide positioned in front of the hologram projector, wherein the holographic image projected by the hologram projector passes through the waveguide, a glare control prism positioned in front of the waveguide assembly, and a waveplate positioned between the waveguide and the glare control prism, the waveplate adapted to adjust the polarization of the holographic image.

    WAVEGUIDE HEAD-UP DISPLAY
    48.
    发明申请
    WAVEGUIDE HEAD-UP DISPLAY 有权

    公开(公告)号：US20230090374A1

    公开(公告)日：2023-03-23

    申请号：US17481909

    申请日：2021-09-22

    Applicant: GM Global Technology Operations LLC

    Inventor： Thomas A. Seder ,  Kai-Han Chang

    IPC: G02B27/01 ,  G09G3/00 ,  G02F1/29

    Abstract: A head-up display system includes a hologram projector adapted to project a holographic image, a beam steering device adapted to adjust a look down angle of a holographic image projected through the beam steering device by the hologram projector, and a controller in communication with the hologram projector and adapted to compare the vertical location of the driver's eyes to a pre-determined nominal vertical position, and to adjust a virtual image distance of the holographic image projected by the hologram projector.

    EMBEDDED EYE TRACKER USING PUPIL EXPANDER GLARE PRISM
    49.
    发明申请
    EMBEDDED EYE TRACKER USING PUPIL EXPANDER GLARE PRISM 有权

    公开(公告)号：US20230065537A1

    公开(公告)日：2023-03-02

    申请号：US17460634

    申请日：2021-08-30

    Applicant: GM Global Technology Operations LLC

    Inventor： Thomas A. Seder ,  Kai-Han Chang

    IPC: G02B27/01 ,  G02B27/00 ,  G02B5/04 ,  G02B5/28

    Abstract: A head-up display and a system and method of operating a head-up display. The head-up display includes a prism, an imager and a camera. The prism has a first surface and a second surface. An infrared-reflective coating on the second surface of the prism has a maximum reflectivity at a selected wavelength. The imager is configured to project a hologram into the prism via the first surface, out of the prism via the second surface, through the infrared-reflective coating and into an eyebox. The camera is configured to receive an eye tracking beam from the eyebox that is reflected from the infrared-reflective coating. A processor determines eye information from the eye tracking beam and adjusts a parameter of the hologram based on the eye information.

    Ground line monitoring system
    50.
    发明授权
    Ground line monitoring system 有权

    公开(公告)号：US11589017B1

    公开(公告)日：2023-02-21

    申请号：US17539365

    申请日：2021-12-01

    Applicant: GM Global Technology Operations LLC

    Inventor： Kai-Han Chang ,  Thomas A. Seder

    IPC: H04N9/04 ,  H04N9/09 ,  H04N17/00

    Abstract: A ground line monitoring system includes a camera mounted in a first automobile vehicle. A waveguide directs a light into the camera having a first in-coupling grating receiving a first light imaging data and passing the first light imaging data as a first frequency of the light and a second in-coupling grating receiving a second light imaging data and passing the second light imaging data as a second frequency of the light. A color filter wheel receives the first frequency of the light and the second frequency of the light. An image sensor of the camera receives the first frequency of the light and the second frequency of the light at different times due to rotation of the color filter wheel. A controller performs a calculation using directions and angles of the first frequency of the light and the second frequency of the light to correct a camera image.

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