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公开(公告)号：US20240151969A1
公开(公告)日：2024-05-09
申请号：US18500783
申请日：2023-11-02
申请人： Envisics Ltd
发明人： Michael Spurr , Daniel Molina , Gary Mills
IPC分类号： G02B27/01
CPC分类号： G02B27/0149 , G02B27/0103 , G02B27/0179 , G02B2027/0159 , G02B2027/0187
摘要： A head-up display system includes an eye-box having a first and second dimension, an image projector including a picture generating unit and an optical system, and a movement assembly. The picture generating unit includes a spatial light modulator arranged to spatially modulate light in accordance with a hologram. The optical system relays the spatially modulated light to an optical combiner. The movement assembly moves at least a portion of the image projector rectilinearly between a plurality of positions such that at least one component of the picture generating unit is moved together with the optical system. Spatially modulated light relayed to the optical combiner forms a virtual image viewable from a sub-eye-box having a position in the first dimension being dependent on the position of the at least a portion of the image projector. The eye-box is the sum of the sub-eye-boxes associated with each of the plurality of positions.
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公开(公告)号：US20240134312A1
公开(公告)日：2024-04-25
申请号：US18474994
申请日：2023-09-25
申请人： Envisics Ltd
CPC分类号： G03H1/0443 , G02B27/0103 , G02B2027/0109 , G02B2027/0123 , G03H2001/045
摘要： A method of calculating a sub-hologram of a virtual image point for an optical system includes determining an area delimited by straight line paths from the virtual image point to the perimeter of an entrance pupil of a viewer. The area includes a first area component on a first virtual replica of a display device and a second area component on a second virtual replica of the display device. The method also includes determining a first sub-hologram component of the virtual image point within the first area component and a second sub-hologram component of the virtual image point within the second area component. The method additionally includes superimposing the first sub-hologram component and second sub-hologram component to form a sub-hologram of the virtual image point. The method further includes applying a local phase-ramp function to at least one of the first area component and second area component.
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公开(公告)号：US20240111153A1
公开(公告)日：2024-04-04
申请号：US18240594
申请日：2023-08-31
申请人： Envisics Ltd
发明人： Yiren XIA , Timothy SMEETON
CPC分类号： G02B27/0103 , G02B6/0035 , G02B6/0055 , G02B27/0081
摘要： A waveguide includes a pair of complementary surfaces arranged to provide waveguiding therebetween. A first surface of the pair of complementary surfaces includes a plurality of first layers and a plurality of second layers. Each first layer includes a first dielectric. Each second layer includes a second dielectric. Each first and second layer has a first end and a second end. A percentage change in the thickness of each layer from the first end to the second end of that layer has one of a plurality of discrete allowable values. The total number of first and second layers is greater than the total number of discrete allowable values. A difference in refractive index between the first dielectric and second dielectric is greater than 0.4.
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公开(公告)号：US11938816B2
公开(公告)日：2024-03-26
申请号：US15734439
申请日：2019-07-16
申请人： Envisics Ltd
发明人： Jamieson Christmas
CPC分类号： B60K35/00 , G02B27/0172 , G03H1/2205 , G03H1/2294 , B60K35/23 , B60K35/60 , B60K2360/23 , B60K2360/334 , B60K2360/785 , G02B2027/0178 , G03H2222/12 , G03H2223/14
摘要： There is provided a head-up display for a vehicle having a window. The head-up display comprises a picture generating unit (410) and an optical system (420). The picture generating unit is arranged to output pictures. The optical system is arranged to receive the pictures output by the picture generating unit and project the pictures onto the window (430) of the vehicle to form a virtual image (450, 707) of each picture within a virtual image area (605). The picture generating unit is arranged to output pictures within a cropped picture area such that the virtual image area (605) has a corresponding cropped shape. FIG. 7 illustrates a perspective view of a three lanes road (501,502,503) onto which a virtual image (707) within a cropped virtual image area (605) is overlaid.
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公开(公告)号：US20240036308A1
公开(公告)日：2024-02-01
申请号：US18335833
申请日：2023-08-30
申请人： Envisics Ltd
发明人： Jamieson CHRISTMAS
CPC分类号： G02B27/0081 , G02B27/0093 , G02B27/1026 , G02B2027/0109
摘要： A projection system comprising a display device, a hologram engine and a waveguide. The display device is arranged to display a hologram of an image and spatially modulate light in accordance with the hologram to form a holographic wavefront. The hologram engine is arranged to calculate the hologram. The hologram is arranged to angularly distribute light within the holographic wavefront in accordance with spatial position within the image such that continuous angular ranges of the holographic wavefront respectively correspond with continuous regions of the image. The waveguide comprising a pair of parallel reflective surfaces arranged to waveguide the holographic wavefront therebetween. A first surface of the pair of parallel reflective surfaces is partially reflective-transmissive so as to form an output comprising a plurality of emission zones for the holographic wavefront. The hologram engine is arranged to modify the hologram to at least partially compensate for a decrease in intensity of the emission from each successive emission zone of the waveguide caused by the partial reflection-transmissions at the first surface during waveguiding.
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公开(公告)号：US11846775B2
公开(公告)日：2023-12-19
申请号：US17334009
申请日：2021-05-28
申请人： Envisics Ltd
发明人： Jamieson Christmas , Michael Spurr , Daniel Molina , Gary Mills
CPC分类号： G02B27/0101 , G02B13/0095 , G02B27/0081
摘要： A head-up display arranged to form a virtual image viewable from an eye-box area. The head-up display is arranged to received picture content within a sub-region of a substantially quadrilateral display area. The head-up display further comprises an optical relay system arranged to relay the received picture content to an eye-box of the head-up display such that a virtual image of the picture content is visible therefrom. The optical relay system comprises at least one optical component shaped in correspondence with the shape of the sub-region. The shape of the eye-box area is non-rectangular such as a corner-cropped rectangular shape or elliptical shape.
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公开(公告)号：US11801749B2
公开(公告)日：2023-10-31
申请号：US16860632
申请日：2020-04-28
申请人： Envisics Ltd
发明人： Alexander Cole
CPC分类号： B60K35/00 , B60R1/00 , B60K2370/29 , B60R2300/103 , B60R2300/205 , B60R2300/8026
摘要： A system, such as a driver assistance system, arranged to form images of outside a vehicle for viewing from an eye box region within the vehicle. The system comprises an image capture device, a picture generating unit and an optical element. The image capture device is arranged to be mounted to the vehicle. The image capture device is arranged to capture images outside the vehicle. The optical element is disposed in front of the replay plane. The optical element has a focal length. The distance between the replay plane and the optical element is less that the focal length of the optical element such that the optical element forms a virtual image of each picture for viewing from the eye box region. The picture generating unit may be a holographic projector. The holographic projector may be arranged to form pictures on a replay plane. Each picture may correspond to an image captured by the image capture device.
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公开(公告)号：US20230333374A1
公开(公告)日：2023-10-19
申请号：US17780057
申请日：2020-12-02
申请人： Envisics Ltd
发明人： Neil Collings , Alexander Cole
IPC分类号： G02B27/01
CPC分类号： G02B27/0103 , G02B2027/0123
摘要： Disclosed embodiments include a display system having a viewing window on a viewing plane, the display system comprising a picture-generating unit and an imaging system, where the picture-generating unit displays a picture on a display plane that is a holographic reconstruction formed from a hologram of the picture. The imaging system comprises a projection lens disposed between the display plane and viewing plane, an aperture stop, and a waveguide pupil expander. The projection lens comprises a pair of planar surfaces that define the boundaries of the projection lens, the aperture stop restricts the aperture of the projection lens in the first direction and forms the limiting aperture stop of the imaging system, and the waveguide pupil expander receives light of the picture from the projection lens through the aperture stop and replicates the aperture stop to expand the viewing window of the display system.
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公开(公告)号：US20230324683A1
公开(公告)日：2023-10-12
申请号：US18203838
申请日：2023-05-31
申请人： Envisics Ltd
发明人： Timothy Smeeton , Yiren Xia , Celedonia Krawczyk
CPC分类号： G02B27/0103 , G02B6/0036 , G02B2027/0118 , G02B2027/0123 , G02B2207/123
摘要： A head-up display for a vehicle comprises an optical component having a reflective surface arranged, during head-up display operation, in a configuration that is conducive to sunlight glare. A light control layer is disposed on the optical component to receive sunlight on an optical path to the reflective surface. The light control layer comprises a sunlight-receiving surface and a core material separating an array of louvres. The sunlight-receiving surface of the light control layer is serrated in coordination with the array of louvres so as to deflect received sunlight away from the eye-box of the head-up display.
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公开(公告)号：US20230314802A1
公开(公告)日：2023-10-05
申请号：US17977325
申请日：2022-10-31
申请人： ENVISICS LTD
发明人： Timothy Smeeton , Yiren Xia , Celedonia Krawczyk
CPC分类号： G02B27/0103 , G02B6/0036 , G02B2207/123 , G02B2027/0123 , G02B2027/0118
摘要： A head-up display for a vehicle comprises an optical component having a reflective surface arranged, during head-up display operation, in a configuration that is conducive to sunlight glare. A light control layer is disposed on the optical component to receive sunlight on an optical path to the reflective surface. The light control layer comprises a sunlight-receiving surface and a core material separating an array of louvres. The sunlight-receiving surface of the light control layer is serrated in coordination with the array of louvres so as to deflect received sunlight away from the eye-box of the head-up display.
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