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1. 发明公开

EP4300167A1 COMPACT HEAD-UP DISPLAY AND PUPIL EXPANDER THEREFOR 审中-实审
公开(公告)号：EP4300167A1
公开(公告)日：2024-01-03
申请号：EP23175452.4
申请日：2023-05-25
申请人： Envisics Ltd.
发明人： COLE, Alexander , MAHARJAN, Rakesh , COLLINGS, Neil , KRAWCZYK, Celedonia , SMEETON, Timothy , XIA, Yiren
IPC分类号： G02B27/01 , G02B27/00
摘要： A display system comprises a two-dimensional pupil expander. The pupil expander comprises a first replicator, a coupling element and a second replicator. The first replicator is arranged to receive a holographic light field and replicate the holographic light field in a first direction. The holographic light field is diverging. The coupling element comprises a reflective-transmissive surface arranged to receive the output of the first replicator and a reflective surface, opposing the reflective-transmissive surface, in order to guide at least a portion of the holographic light field by internal reflection therebetween to an output port of the coupling element and to reduce the size of the holographic light field in a second direction. The second replicator has an input port arranged to receive the output of the coupling element and replicate the holographic light field in the second direction, wherein the second direction is perpendicular to the first direction.

2. 发明公开

EP4375731A1 MANUFACTURE OF REFLECTION SUPPRESSION DEVICE 审中-实审
公开(公告)号：EP4375731A1
公开(公告)日：2024-05-29
申请号：EP23208800.5
申请日：2023-11-09
申请人： Envisics Ltd
发明人： XIA, Yiren , SMEETON, Timothy , COLE, Alexander
IPC分类号： G02B27/01
CPC分类号： G02B27/01
摘要： There is provided methods of manufacturing a reflection suppression device. The methods comprise 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 comprises at least one selected from the group comprising extruding, injection moulding, hot embossing or cutting the transparent material. The methods further comprise 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 comprises at least one selected from the group comprising: adjoining, gluing, painting or supporting the light absorbing material in a support structure. At least one of the first and second steps comprises at least partially fixing the first component and second component together such that a periodicity of the serrated surface is equal to a periodicity of the array of louvres.

3. 发明公开

EP4332660A1 DISPLAY SYSTEM AND LIGHT CONTROL ELEMENT THEREFOR 审中-实审
公开(公告)号：EP4332660A1
公开(公告)日：2024-03-06
申请号：EP23184625.4
申请日：2023-07-11
申请人： Envisics Ltd.
发明人： KRAWCZYK, Celedonia , XIA, Yiren , SMEETON, Timothy , CHRISTMAS, Jamieson
IPC分类号： G02B27/01
摘要： A display system and light control layer is described. The display system comprises an optical component having a reflective surface. A light control layer is disposed on a first surface of the optical component on an optical path of sunlight to the reflective surface. The light control layer comprises a louvre structure comprising an array of louvres. Each louvre is arranged at an orientation angle relative to the first surface. The separation between adjacent/neighbouring louvres is such that the distal end/edge of one louvre overlaps the proximal end/edge of the adjacent/neighbouring louvre.

4. 发明公开

EP4202533A1 COMPACT HEAD-UP DISPLAY AND WAVEGUIDE THEREFOR 审中-实审
公开(公告)号：EP4202533A1
公开(公告)日：2023-06-28
申请号：EP22213036.1
申请日：2022-12-13
申请人： Envisics Ltd.
发明人： LIN, Ruisheng , SMEETON, Timothy , XIA, Yiren , CHRISTMAS, Jamieson
IPC分类号： G02B27/01
摘要： A display system comprises a waveguide forming a pupil expander. The waveguide comprises a pair of opposing surfaces arranged to guide a diffracted light field therebetween by internal reflection. An input port of the waveguide is arranged to receive light from a display system. An output port of the waveguide is formed by a first transmissive-reflective element of a first surface of the pair of opposing surfaces. The first transmissive-reflective element is such that the diffracted light field is divided at each internal reflection and a plurality of replicas of the diffracted light field are transmitted out of the waveguide through the output port. The input port comprises a second transmissive-reflection element arranged to receive at least a portion of the light from the display system.

5. 发明公开

EP4332685A1 LIGHT CONTROL FILM 审中-实审
公开(公告)号：EP4332685A1
公开(公告)日：2024-03-06
申请号：EP23189978.2
申请日：2023-08-07
申请人： Envisics Ltd.
发明人： SMEETON, Timothy , XIA, Yiren
IPC分类号： G03H1/22 , G03H1/02 , B29D11/00
摘要： A method of manufacturing a light control film. The method comprises providing a plurality of alternating layers of transparent material and light absorbing material. Each layer of light absorbing material is interspersed between respective layers of transparent material. The plurality of alternating layers of transparent material and light absorbing material is stacked in a stacking direction. The stacking direction is perpendicular to the plane of a surface of at least one of the plurality of alternating layers. The method further comprises cutting, with a straight edge, through the plurality of alternating layers of transparent material and light absorbing material in a first cutting plane and a second cutting plane thereby resulting in an intermediate film comprising a first cut surface parallel to the first cutting plane and a second cut surface parallel to the second cutting plane. Each of the first and second cutting planes is orientated at an angle less than or equal to 90° to the stacking direction. The method further comprises hot embossing, using a tool having a repeating prismatic structure, the repeating prismatic structure on the first cut surface of the intermediate film thereby resulting in a serrated/corrugated first surface.

6. 发明公开

EP4273614A1 DISPLAY SYSTEM AND LIGHT CONTROL FILM THEREFOR 审中-实审
公开(公告)号：EP4273614A1
公开(公告)日：2023-11-08
申请号：EP23155027.8
申请日：2023-02-06
申请人： Envisics Ltd.
发明人： SMEETON, Timothy , XIA, Yiren , KRAWCZYK, Celedonia
IPC分类号： G02B27/01
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.

7. 发明公开

EP4345530A1 WAVEGUIDE WITH FOUR GRADIENT COATING 审中-实审
公开(公告)号：EP4345530A1
公开(公告)日：2024-04-03
申请号：EP23192194.1
申请日：2023-08-18
申请人： Envisics Ltd.
发明人： XIA, Yiren , SMEETON, Timothy
IPC分类号： G02B27/01
摘要： A waveguide comprising a pair of complementary surfaces arranged to provide waveguiding therebetween. A first surface of the pair of complementary surfaces comprises a plurality of first layers and a plurality of second layers. Each first layer comprises a first dielectric. Each second layer comprises 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.

8. 发明公开

EP4398044A1 HOLOGRAPHIC PROJECTOR 审中-实审
公开(公告)号：EP4398044A1
公开(公告)日：2024-07-10
申请号：EP23214528.4
申请日：2023-12-06
申请人： Envisics Ltd.
发明人： XIA, Yiren , SMEETON, Timothy
IPC分类号： G03H1/22 , G02B27/01
CPC分类号： G02B27/0103 , G02B2027/012520130101 , G03H1/2205 , G03H2001/220720130101 , G03H2001/228420130101 , G03H1/2294 , G03H2223/1620130101 , G03H2223/2320130101 , G03H2223/1220130101 , G03H2001/224220130101
摘要： A holographic projector comprising a waveguide comprising a pair of opposing reflective surfaces arranged to receive and waveguide a hologram/holographic wavefront therebetween. A first surface of the pair of complementary surfaces is partially reflective-partially transmissive such that a plurality of replicas of the hologram/holographic wavefront are emitted therefrom. The holographic projector further comprises a diffractive optical element arranged to receive the plurality of replicas of the hologram/holographic wavefront from the first surface of the waveguide and principally redirect each replica into a respective non-zero diffractive order defined by a diffraction angle. The holographic projector further comprises an array of louvres arranged to receive the hologram/holographic wavefront from the diffractive optical element, wherein the array of louvres is substantially transmissive at the non-zero diffraction angle and substantially non-transmissive at a zeroth diffraction angle of the diffractive optical element.

9. 发明公开

EP4332684A1 LIGHT CONTROL FILM 审中-实审
公开(公告)号：EP4332684A1
公开(公告)日：2024-03-06
申请号：EP23190161.2
申请日：2023-08-08
申请人： Envisics Ltd.
发明人： XIA, Yiren , SMEETON, Timothy
IPC分类号： G03H1/02 , G03H1/22 , B29D11/00
摘要： A method of manufacturing a light control film. The method comprises providing a plurality of alternating layers of transparent material and light absorbing material, wherein the alternating layers of transparent material and light absorbing material are stacked in a stacking direction. The method also comprises cutting, with a triangle wave-shaped edge, across the plurality of alternating layers of transparent material and light absorbing material in a first cutting plane and a second cutting plane thereby resulting in the light control film comprising a serrated first surface and a serrated second surface, wherein each of the first and second cutting planes is orientated at an angle less than 90° to the stacking direction. The triangle wave-shaped edge comprises a cutting edge with a triangular wave shape perpendicular to the first and/or second cutting plane.

10. 发明公开

EP4202534A1 COMPACT HEAD-UP DISPLAY AND WAVEGUIDE THEREFOR 有权
公开(公告)号：EP4202534A1
公开(公告)日：2023-06-28
申请号：EP22213441.3
申请日：2022-12-14
申请人： Envisics Ltd.
发明人： SMEETON, Timothy , COLLINGS, Neil , XIA, Yiren , MAHARJAN, Rakesh
IPC分类号： G02B27/01
摘要： A waveguide arranged as a pupil expander for a display system is disclosed. The waveguide comprises a pair of opposing surfaces arranged to guide a light field therebetween by internal reflection. An input port is arranged to receive light from the display system. A reflective element is arranged to internally reflect the light field. The input port and reflective element are formed on a second surface of the pair of opposing surfaces;
An output port is formed on a first surface of the pair of opposing surfaces by a transmissive-reflective element configured to divide the light field at each internal reflection therefrom such that a plurality of replicas of the light field are transmitted out of the waveguide through the output port. The reflective element comprises a metal layer disposed on the second surface of the waveguide and a dielectric stack at least partially disposed on the metal layer to form a step. The metal layer forms an edge with the input port and the dielectric stack is offset with respect to the edge in a direction away from the input port.

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