公开(公告)号：US20240241478A1

公开(公告)日：2024-07-18

申请号：US18495546

申请日：2023-10-26

申请人： Envisics Ltd

发明人： Edward Boardman ,  Timothy Smeeton ,  Hugo Malin-Clegg ,  Daniel Burnham ,  Alexander Cole

IPC分类号： G03H1/22

CPC分类号： G03H1/2205 ,  G03H1/2294 ,  G03H2001/221 ,  G03H2001/2234 ,  G03H2223/17 ,  G03H2223/23 ,  G03H2223/26

摘要： A holographic projector includes a display device arranged to form a holographic wavefront by spatially modulating light in accordance with a hologram of a picture. The holographic projector includes a magnification system including a first and second lens. The first lens is arranged form a holographic reconstruction of the picture by focusing the holographic wavefront towards a front focal plane of the first lens. The holographic reconstruction of the picture includes a plurality of pixels. The holographic projector includes a kinoform disposed between the first and second lens and arranged to apply a phase-delay to each pixel of the holographic reconstruction. The holographic projector includes a movement assembly arranged to move the kinoform such that a plurality of different phase-delays are applied to each pixel. The kinoform includes an array of zones and is arranged such that the width of each zone is substantially equal to the distance between adjacent pixels.

公开(公告)号：US20240231276A1

公开(公告)日：2024-07-11

申请号：US18495586

申请日：2023-10-26

申请人： Envisics Ltd

发明人： Alexander Cole ,  Edward Boardman ,  Rakesh Maharjan ,  Timothy Smeeton

IPC分类号： G03H1/22

CPC分类号： G03H1/2286 ,  G03H2001/221 ,  G03H2001/2234 ,  G03H2223/24

摘要： A device for processing a holographic wavefront, the device includes a holographic wavefront splitter having an input side arranged to receive a holographic wavefront on a first plane and divide the holographic wavefront into first and second portions. The input side includes a first reflector arranged to direct the first portion away from the first plane in a first direction, a second reflector arranged to direct the second portion away from the first plane in a second direction, and a discontinuity between the first reflector and second reflector. The discontinuity is arranged to receive and nullify a third portion of the holographic wavefront. The first and second reflectors are arranged to direct the first and second portions to an input side of a holographic wavefront recombiner. The holographic wavefront recombiner is arranged such that the first and second portions are recombined at an output side of the holographic wavefront recombiner.

公开(公告)号：US20230288870A1

公开(公告)日：2023-09-14

申请号：US18168244

申请日：2023-02-13

申请人： Envisics Ltd

发明人： Timothy Smeeton ,  Edward Boardman

IPC分类号： G03H1/22 ,  G02F1/133

CPC分类号： G03H1/2205 ,  G03H1/2294 ,  G02F1/13306 ,  G03H2001/2239

摘要： A light shuttering device comprises a plurality of liquid crystal cells, wherein each liquid crystal cell is operable in a first optical state or a second optical state in response to a respective first or second drive signal. A drive circuit comprises a plurality of switches and a drive controller. Each switch is arranged to output the respective first or second drive signal to a respective liquid crystal cell. The drive controller is arranged to sequentially update the output of each switch during an update cycle. The drive circuit is arranged to determine the order in which the switches are sequentially updated during an update cycle based on any changes to the respective drive signals that will be made during the update.