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76 条记录 (耗时 0.029 秒)

    Image projector
    62.
    发明授权
    Image projector 有权

    公开(公告)号：US11964560B2

    公开(公告)日：2024-04-23

    申请号：US17056120

    申请日：2019-05-14

    申请人： Envisics Ltd

    发明人： Jamieson Christmas

    IPC分类号： B60K35/00 ,  B60K35/23 ,  B60K35/60 ,  G03H1/08 ,  G03H1/16 ,  G03H1/22

    CPC分类号： B60K35/00 ,  G03H1/08 ,  G03H1/16 ,  G03H1/2205 ,  G03H1/2294 ,  B60K35/23 ,  B60K35/60 ,  B60K2360/23 ,  B60K2360/29 ,  B60K2360/333 ,  B60K2360/334 ,  B60K2360/785

    摘要： There is provided ahead-up display in a vehicle arranged to display a picture, the head-up display comprises a first optical sub-system disposed in an upper region of the windscreen and a second optical sub-system disposed underneath the dashboard of the vehicle proximate a lower region of the windscreen. The first optical sub-system is arranged to output a light field. The first optical sub-system comprises a light source and a spatial light modulator. The light source is arranged to emit light. The spatial light modulator is arranged to receive the light from the light source and spatially-modulated the light in accordance with a computer-generated hologram displayed on the spatial light modulator. The second optical sub-system is arranged to receive the light field from the first optical sub-system and project the light field onto a windscreen of the vehicle to form a virtual image on the windscreen.

    Light engine
    64.
    发明授权
    Light engine 有权

    公开(公告)号：US11853006B2

    公开(公告)日：2023-12-26

    申请号：US18072275

    申请日：2022-11-30

    申请人： ENVISICS LTD

    发明人： Alexander Cole ,  Timothy Smeeton ,  Jamieson Christmas

    IPC分类号： G03H1/22 ,  G02B27/00 ,  G02B27/01

    CPC分类号： G03H1/2294 ,  G02B27/0081 ,  G02B2027/0121 ,  G03H2001/2239

    摘要： A light engine arranged to form an image visible from a viewing window. The light engine comprises: a display device arranged to display a hologram of the image and spatially modulate light in accordance with the hologram; a hologram replicator arranged to receive the spatially modulated light and provide a plurality of different light propagation paths for the spatially modulated light from the display device to the viewing window; and a control device disposed in an optical path between the first replicator and the second replicator. The control device is angled such that light from the first replicator is incident at an acute angle on the control device, and each cell of the array is switchable between a first state and a second state.

    Hologram Calculation For Compact Head-Up Display
    67.
    发明公开
    Hologram Calculation For Compact Head-Up Display 审中-公开

    公开(公告)号：US20230204953A1

    公开(公告)日：2023-06-29

    申请号：US18062288

    申请日：2022-12-06

    申请人： Envisics Ltd

    发明人： Timothy Smeeton ,  Jacopo Antonello ,  Jamieson Christmas

    IPC分类号： G02B27/01

    CPC分类号： G02B27/0101 ,  G02B2027/014 ,  G02B2027/0107 ,  G02B2027/0109

    摘要： An optical system and a method of calculating a hologram of a virtual image for the optical system is described. The optical system comprises a display device arranged to display the hologram and a waveguide arranged to replicate the hologram. The method comprises determining a sub-hologram of a virtual image point within an area defined by straight line paths from the virtual image point to the perimeter of an entrance pupil of a viewer. The area comprises at least part of a virtual replica of the display device formed by the waveguide.

    PUPIL EXPANDER
    68.
    发明公开
    PUPIL EXPANDER 审中-公开

    公开(公告)号：US20230168496A1

    公开(公告)日：2023-06-01

    申请号：US18160243

    申请日：2023-01-26

    申请人： Envisics Ltd

    发明人： Jamieson Christmas

    IPC分类号： G02B27/00 ,  G02B27/01

    CPC分类号： G02B27/0081 ,  G02B27/0093 ,  G02B27/0101 ,  G02B27/0172 ,  G02B2027/0112 ,  G02B2027/0174

    摘要： There is disclosed herein a display device comprising a picture generating unit, a waveguide pupil expander and a viewer-tracking system. The picture generating unit comprises a first display channel, a second display channel and a controller. The first display channel is arranged to output first spatially-modulated light of a first colour. The first spatially-modulated light corresponds to a first picture. The second display channel is arranged to output second spatially-modulated light of a second colour. The second spatially-modulated light corresponding to a second picture. The controller is arranged to drive the first display channel and second display channel. The waveguide pupil expander comprises a pair of parallel reflective surfaces. The waveguide pupil expander defines an input port and a viewing window. The input port is arranged to receive the first spatially-modulated light and the second spatially-modulated light. The viewing window is an area or volume within which a viewer may view the first picture and the second picture. The pair of parallel reflective surfaces is arranged to guide the first spatially-modulated light and the second spatially-modulated light from the input port to the viewing window by a series of internal reflections. The reflectivity of a first reflective surface of the pair of parallel reflective surfaces is provided by a graded coating. The graded coating is partially transmissive to light of the first colour and light of the second colour. The transmissivity of the graded coating is non-achromatic. The viewer-tracking system is arranged to determine a viewing position within the viewing window. The controller is arranged to maintain as substantially constant the colour balance of the first and second picture as seen from the viewing position based on the viewing position determined by the viewer-tracking system.

    Pupil Expansion
    69.
    发明公开
    Pupil Expansion 审中-公开

    公开(公告)号：US20230152580A1

    公开(公告)日：2023-05-18

    申请号：US18156966

    申请日：2023-01-19

    申请人： Envisics Ltd

    发明人： Jamieson Christmas

    IPC分类号： G02B27/01 ,  F21V8/00 ,  G02B27/00

    CPC分类号： G02B27/0101 ,  G02B6/002 ,  G02B6/003 ,  G02B27/0081 ,  G02B2027/0125

    摘要： There is disclosed herein a waveguide comprising an optical slab and an optical wedge. The optical slab has a first refractive index, n1>1. The optical slab comprises: a pair of opposing surfaces and an input port. The pair of opposing surfaces are arranged in a parallel configuration. The input port is arranged to receive light into the optical slab at an angle such that the light is guided between the first and second opposing surfaces by a series of internal reflections. The optical wedge has a second refractive index, n2, wherein 1

    Compact Head-up Display
    70.
    发明申请
    Compact Head-up Display 有权

    公开(公告)号：US20230088953A1

    公开(公告)日：2023-03-23

    申请号：US17931597

    申请日：2022-09-13

    申请人： Envisics Ltd

    发明人： Timothy Smeeton ,  Jamieson Christmas ,  Rakesh Maharjan ,  Celedonia Krawczyk ,  Daniel Burnham ,  Ruisheng Lin

    IPC分类号： G02B27/01 ,  G02B27/00

    摘要： Disclosed embodiments include a display system comprising a first waveguide pupil expander comprising an input port, output port, a first pair of parallel surfaces, and a second pair of parallel surfaces. The first pair of parallel surfaces is orthogonal to the second pair of parallel surfaces and arranged to light guide a diffracted or diverging (e.g. holographic) light field from the input port to the output port by internal reflection therebetween. A first surface of the first pair of parallel surfaces is partially transmissive-reflective such that the light field is divided at each internal reflection and a plurality of replicas of the light field is transmitted through a region of the first surface that forms the output port. The second pair of parallel surfaces is also arranged to light guide the light field from the input port to the output port by at least one internal reflection.