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公开(公告)号：US11979688B2
公开(公告)日：2024-05-07
申请号：US17408012
申请日：2021-08-20
申请人： DUALITAS LTD
发明人： Jamieson Christmas
CPC分类号： H04N9/312 , G03H1/0005 , G03H1/2294 , G09G3/003 , G09G3/2022 , G09G3/3648 , H04N9/3108 , G03H2001/0088 , G03H2240/61 , G09G2300/0857 , G09G2310/0286
摘要： A liquid crystal on silicon spatial light modulator comprising an array of light-modulating pixels and a controller are disclosed. Each light-modulating pixel of the array comprises liquid crystal and is associated with a respective flip-flop. The controller receives a hologram of an image comprising a plurality of hologram pixels. Each hologram pixel comprises a respective n-bit hologram pixel value. The controller drives each light-modulating pixel in accordance with a respective hologram pixel value of the hologram. There is a one-to-n pixel correlation between the hologram and the light-modulating pixels. The flip-flops of each contiguous group of n light-modulating pixels are connected in series to form a shift register. During operation of the shift register, the n-bit hologram pixel value associated with each contiguous group of n light-modulating pixels is provided to each light-modulating pixel one bit at a time over the course of at least n clock cycles.
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公开(公告)号：US11810488B2
公开(公告)日：2023-11-07
申请号：US16995460
申请日：2020-08-17
申请人： Dualitas Ltd
发明人： Jamieson Christmas
CPC分类号： G09G3/003 , G09G3/2022 , G09G3/3614 , G09G3/3648 , G03H1/0005 , G03H2001/0088 , G09G2300/0478 , G09G2320/0204
摘要： A method of driving a display device. The display device comprises a liquid crystal panel, a display engine and a hologram engine. The liquid crystal display panel comprising a plurality of pixels. The display device comprises a display engine arrange to drive each pixel of the plurality of pixels during each display interval of a plurality of display intervals defined by the display device. Each pixel is driven in accordance with a drive signal. The drive signal may comprise a pixel voltage for each pixel. The display engine is arranged to invert the polarity of the drive signal every display interval. The hologram engine is arranged to send multi-level phase holograms for display to the display engine. The method comprises displaying the multi-level phase holograms in immediately consecutive display intervals without field inversion.
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公开(公告)号：US11500332B2
公开(公告)日：2022-11-15
申请号：US16726299
申请日：2019-12-24
申请人： Dualitas Ltd
发明人： Jamieson Christmas
摘要： A display system comprising a first plurality of pixels, a second plurality of pixels, a first Fourier transform lens and a second Fourier transform lens. The first plurality of pixels is arranged ranged to display first holographic data corresponding to a first holographic reconstruction and receive light of a first wavelength. The a second plurality of pixels is arranged to display second holographic data corresponding to a second holographic reconstruction and receive light of a second wavelength. The first Fourier transform lens is arranged to receive spatially modulated light having a first wavelength from the first plurality of pixels and perform an optical Fourier transform of the received light to form the first holographic reconstruction at a replay plane, wherein the first holographic reconstruction is formed of light at the first wavelength. The second Fourier transform lens is arranged to receive spatially modulated light having a second wavelength from the second plurality of pixels and perform an optical Fourier transform of the received light to form the second holographic reconstruction at the replay plane, wherein the second holographic reconstruction is formed of light at the second wavelength. The optical path length from the first Fourier transform lens to the replay plane is not equal to the optical path length from the second Fourier transform lens to the replay plane.
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公开(公告)号：US11231683B2
公开(公告)日：2022-01-25
申请号：US16679167
申请日：2019-11-09
申请人： Dualitas Ltd
摘要： There is provided a driver for a spatial light modulator. The spatial light modulator comprises [m×n] pixels. The driver is arranged to receive input holograms each comprising [x×y] pixels, wherein m≥x and n≥y. The driver is further arranged to drive the spatial light modulator to display thereon output holograms each comprising [m×n] pixels by tiling each input hologram onto the pixels of the spatial light modulator to form an output hologram corresponding to each input hologram using a tiling scheme. The driver is arranged to use a first tiling scheme to display a first output hologram and a second tiling scheme to display a second output hologram. Each output hologram comprises a plurality of tiles of the input hologram. Each tiling scheme defines the size of each tile and the position of each tile on the pixels of the spatial light modulator.
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公开(公告)号：US20210341879A1
公开(公告)日：2021-11-04
申请号：US17176355
申请日：2021-02-16
申请人： Dualitas Ltd
摘要： A display system (300) comprising an optical system and a processing system. The optical system comprising a spatial light modulator (380), a light source, a Fourier transform lens, a viewing system (320, 330) and a processing system. The spatial light modulator is arranged to display holographic data in the Fourier domain, illuminated by the light source. The Fourier transform lens is arranged to produce a 2D holographic reconstruction in the spatial domain (310) corresponding to the holographic data. The viewing system is arranged to produce a virtual image (350) of the 2D holographic reconstruction. The processing system is arranged to combine the Fourier domain data representative of a 2D image with Fourier domain data representative of a phase only lens to produce first holographic data, and provide the first holographic data to the optical system to produce a virtual image.
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公开(公告)号：US20210084270A1
公开(公告)日：2021-03-18
申请号：US17000845
申请日：2020-08-24
申请人： Dualitas Ltd
摘要： A holographic projector comprises an image processing engine, a hologram engine, a display engine and a light source. The image processing engine is arranged to receive a source image for projection and generate a plurality of secondary images from a primary image based on the source image. The source image comprises pixels. Each secondary image may comprise fewer pixels than the source image. The plurality of secondary images are generated by sampling the primary image. The hologram engine is arranged to determine, such as calculate, a hologram corresponding to each secondary image to form a plurality of holograms. The display engine is arranged to display each hologram on the display device. The light source is arranged to Illuminate each hologram during display to form a holographic reconstruction corresponding to each secondary image on a replay plane. The primary image is selected from the group comprising: the source image and an intermediate image
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公开(公告)号：US20200301143A1
公开(公告)日：2020-09-24
申请号：US16824213
申请日：2020-03-19
申请人： Dualitas Ltd
发明人： Jamieson Christmas , Cole Alexander
摘要： There is provided a holographic projector comprising a spatial light modulator, a light source and an assembly. The spatial light modulator is arranged to display a hologram. The light source is arranged to illuminate at least one region of the spatial light modulator with an input beam such that the input beam is spatially modulated by the spatial light modulator in accordance with the hologram to form a holographic reconstruction. The assembly is arranged to move at least one of the input beam and the spatial light modulator relative to the other.
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公开(公告)号：US20200292990A1
公开(公告)日：2020-09-17
申请号：US16665194
申请日：2019-10-28
申请人： Dualitas Ltd
发明人： Jamieson Christmas
IPC分类号： G03H1/22
摘要： There is provided a holographic image generation system comprising: a spatial light modulator (SLM) having pixels; a light source configured to illuminate the SLM; a temporal modulator; a light sensor associated with the SLM; and a demodulator. The temporal light modulator is arranged to modulate an output intensity of the light source over time to encode holographic data representing a hologram. The light sensor is configured to receive light from the light source and generate a signal representative of the output intensity of the light source. The demodulator is connected to the light sensor to receive the signal, and is arranged to decode the signal to obtain the holographic data. The demodulator is further connected to the SLM to set the pixels of the SLM in accordance with the holographic data to display the hologram ready for illumination by the light source to form a holographic reconstruction.
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公开(公告)号：US20180120768A1
公开(公告)日：2018-05-03
申请号：US15565828
申请日：2017-03-03
申请人： Dualitas Ltd.
发明人： Jamieson Christmas
摘要： A display system comprising a first plurality of pixels, a second plurality of pixels, a first Fourier transform lens and a second Fourier transform lens. The first plurality of pixels is arranged to display first holographic data corresponding to a first holographic reconstruction and receive light of a first wavelength. The a second plurality of pixels is arranged to display second holographic data corresponding to a second holographic reconstruction and receive light of a second wavelength. The first Fourier transform lens is arranged to receive spatially modulated light having a first wavelength from the first plurality of pixels and perform an optical Fourier transform of the received light to form the first holographic reconstruction at a replay plane, wherein the first holographic reconstruction is formed of light at the first wavelength. The second Fourier transform lens is arranged to receive spatially modulated light having a second wavelength from the second plurality of pixels and perform an optical Fourier transform of the received light to form the second holographic reconstruction at the replay plane, wherein the second holographic reconstruction is formed of light at the second wavelength. The optical path length from the first Fourier transform lens to the replay plane is not equal to the optical path length from the second Fourier transform lens to the replay plane.
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公开(公告)号：US20230308620A1
公开(公告)日：2023-09-28
申请号：US18204303
申请日：2023-05-31
申请人： Dualitas Ltd
CPC分类号： H04N9/3179 , G03H1/28 , H04N9/3141 , G03H2225/12 , G03H2226/02
摘要： A holographic projector comprises an image processing engine, a hologram engine, a display engine and a light source. The image processing engine is arranged to receive a source image for projection and generate a plurality of secondary images from a primary image based on the source image. The source image comprises pixels. Each secondary image may comprise fewer pixels than the source image. The plurality of secondary images are generated by sampling the primary image. The hologram engine is arranged to determine, such as calculate, a hologram corresponding to each secondary image to form a plurality of holograms. The display engine is arranged to display each hologram on the display device. The light source is arranged to Illuminate each hologram during display to form a holographic reconstruction corresponding to each secondary image on a replay plane. The primary image is selected from the group comprising: the source image and an intermediate image
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