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公开(公告)号：US12210151B2
公开(公告)日：2025-01-28
申请号：US17186752
申请日：2021-02-26
Applicant: Envisics Ltd
Inventor： Alexander Cole
Abstract: A display device having a viewing window on a viewing plane is described. The display device comprises a picture generating unit, a first waveguide pupil expander and a second waveguide pupil expander. The picture generating unit is arranged to display a picture on a display plane. The picture is a holographic reconstruction formed from a hologram of the picture. The first waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a first exit pupil thereof in a first dimension. The second waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a second exit pupil thereof in the first dimension. The first dimension corresponds to a dimension of the viewing window. A method of expanding a viewing window of a display device is also described.
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公开(公告)号：US20240231090A1
公开(公告)日：2024-07-11
申请号：US18397818
申请日：2023-12-27
Applicant: Envisics Ltd
Inventor： Alexander Cole
IPC: G02B27/01
CPC classification number: G02B27/0103 , G02B2027/011
Abstract: A method of calibrating a picture generating unit. The method includes displaying a pattern corresponding to a picture on a spatial light modulator. The method further includes propagating light along a propagation axis wherein the light illuminates the spatial light modulator so as to spatially modulate the light. A first portion of the propagation axis passes through a first lens of the picture generating unit. The method also includes changing the position of the first portion of the propagation axis with respect to an optical axis of the first lens. The first portion of the propagation axis is substantially parallel to the optical axis of the first lens.
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公开(公告)号：US20240168203A1
公开(公告)日：2024-05-23
申请号：US18500832
申请日：2023-11-02
Applicant: Envisics Ltd
Inventor： Yiren Xia , Timothy Smeeton , Alexander Cole
CPC classification number: G02B5/003 , G02B27/0101 , G02B2027/0118 , G02B2207/123
Abstract: Methods of manufacturing a reflection suppression device include a first step of forming a first component of the reflection suppression device by processing a transparent material to form a serrated surface. Processing the transparent material includes at least one selected from the group including extruding, injection moulding, hot embossing or cutting the transparent material. The methods include a second step of forming a second component of the reflection suppression device by processing a light absorbing material to form a plurality of louvres arranged in an array. Processing the light absorbing material includes at least one selected from the group including: adjoining, gluing, painting or supporting the light absorbing material in a support structure. At least one of the first and second steps includes partially fixing the first and second components together such that a periodicity of the serrated surface is equal to a periodicity of the array of louvres.
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公开(公告)号：US11480811B2
公开(公告)日：2022-10-25
申请号：US16584337
申请日：2019-09-26
Applicant: Envisics Ltd
Inventor： Alexander Cole
Abstract: The disclosure provides in one aspect a head-up display for a vehicle. The head-up display comprises a picture generating unit, an optical system and a light-selective filter. The picture generating unit is arranged to display a picture on a screen. The optical system is arranged to receive light of the picture. The optical system comprises at least one optical element having optical power arranged to form a magnified image of the picture. The light-selective filter is transmissive to light of the picture and reflective to other light. The light-selective filter is disposed between the optical system and the screen. The light-selective filter has a first surface arranged to receive light from the optical system and a second surface arranged to receive light of the picture from the screen.
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公开(公告)号：US12210152B2
公开(公告)日：2025-01-28
申请号：US17719100
申请日：2022-04-12
Applicant: ENVISICS LTD
Inventor： Alexander Cole
Abstract: A display device having a viewing window on a viewing plane is described. The display device comprises a picture generating unit, a first waveguide pupil expander and a second waveguide pupil expander. The picture generating unit is arranged to display a picture on a display plane. The picture is a holographic reconstruction formed from a hologram of the picture. The first waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a first exit pupil thereof in a first dimension. The second waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a second exit pupil thereof in the first dimension. The first dimension corresponds to a dimension of the viewing window. A method of expanding a viewing window of a display device is also described.
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Patent Agency Ranking
公开(公告)号：US11801749B2
公开(公告)日：2023-10-31
申请号：US16860632
申请日：2020-04-28
Applicant: Envisics Ltd
Inventor： Alexander Cole
CPC classification number: B60K35/00 , B60R1/00 , B60K2370/29 , B60R2300/103 , B60R2300/205 , B60R2300/8026
Abstract: 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
Applicant: Envisics Ltd
Inventor： Neil Collings , Alexander Cole
IPC: G02B27/01
CPC classification number: G02B27/0103 , G02B2027/0123
Abstract: 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：US20220236561A1
公开(公告)日：2022-07-28
申请号：US17719028
申请日：2022-04-12
Applicant: ENVISICS LTD
Inventor： Alexander Cole
IPC: G02B27/01
Abstract: A display device having a viewing window on a viewing plane is described. The display device comprises a picture generating unit, a first waveguide pupil expander and a second waveguide pupil expander. The picture generating unit is arranged to display a picture on a display plane. The picture is a holographic reconstruction formed from a hologram of the picture. The first waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a first exit pupil thereof in a first dimension. The second waveguide pupil expander comprises an input port arranged to receive light of the picture and to expand a second exit pupil thereof in the first dimension. The first dimension corresponds to a dimension of the viewing window. A method of expanding a viewing window of a display device is also described.
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公开(公告)号：US20190041641A1
公开(公告)日：2019-02-07
申请号：US16051962
申请日：2018-08-01
Applicant: Envisics Ltd.
Inventor： Jamieson Christmas , Alexander Cole , Mate Karner
Abstract: There is provided a head-up display for a vehicle, the head-up display comprising: a picture generating unit arranged to generate a picture on a light receiving surface; and an optical system arranged to image the picture, wherein the optical system comprises: an input arranged to receive light of the picture; an output arranged to output light forming an image of the picture; a first mirror and second mirror arranged to guide light from the input to the output along an optical path, wherein the optical path comprises: a first optical path from the input to the second mirror including a transmission through the first mirror; and second optical path from the second mirror to the output including a reflection off the first mirror.
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公开(公告)号：US20250053006A1
公开(公告)日：2025-02-13
申请号：US18798749
申请日：2024-08-08
Applicant: Envisics Ltd
Inventor： Alexander Cole
Abstract: A holographic projection system is provided. The holographic projection system includes a first hologram and a second hologram. The holographic projection system is arranged to spatially modulate light in accordance with the first hologram to form a first holographic wavefront and to spatially modulate light in accordance with the second hologram to form a second holographic wavefront. The holographic projection system further includes a waveguide including an input port that includes a first input area arranged to receive the first holographic wavefront and a second input area arranged to receive the second holographic wavefront. The waveguide further includes a pair of surfaces arranged to waveguide the first and second holographic wavefront therebetween. The waveguide is arranged such the first holographic wavefront is combined with the second holographic wavefront after one or more internal reflections of the first holographic wavefront between the pair of surfaces.
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