公开(公告)号：US12078816B2

公开(公告)日：2024-09-03

申请号：US17168108

申请日：2021-02-04

Applicant: LEIA INC.

Inventor： Xuejian Li ,  Ming Ma ,  David A. Fattal

IPC: G02B27/30 ,  G02B5/02 ,  G02B27/44

CPC classification number: G02B27/30 ,  G02B5/0252 ,  G02B27/44

Abstract: A grating collimator and backlight system provide collimated light to illuminate a backlight. The grating collimator includes a light guide configured to guide light as guided light and a light-recycling light source configured to provide light to the light guide and to recycle light received from the light guide. The grating collimator further includes a diffraction grating coupler configured to diffractively redirect the provided light into the light guide as the guided light. The backlight system includes the grating collimator configured to provide collimated output light and the backlight configured to receive the collimated output light. The backlight may be multiview backlight.

公开(公告)号：US12072577B2

公开(公告)日：2024-08-27

申请号：US18142901

申请日：2023-05-03

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Thomas Hoekman ,  Ming Ma

IPC: G02F1/13357 ,  F21V8/00 ,  G02B30/33 ,  G09G3/3208 ,  G09G3/34 ,  H04N13/32 ,  H04N13/349 ,  H04N13/351

CPC classification number: G02F1/133606 ,  G02B6/0073 ,  G02B30/33 ,  G09G3/3208 ,  G09G3/3426 ,  H04N13/32 ,  H04N13/349 ,  H04N13/351 ,  G09G2320/028

Abstract: A multiview backlight, multiview display, and method employ arrays of active emitters arranged in columns to provide directional light beams having directions corresponding to view directions of a multiview display. The multiview backlight includes a first array of active emitters arranged in columns and configured to provide a first plurality of directional light beams and a second array of active emitters arranged in columns and configured to provide a second plurality of directional light beams. Columns of the second active emitter array are disposed between and alternate with the columns of the first active emitter array. The multiview display further includes an array of light valves configured to modulate the directional light beams to display a multiview image. The view directions of the multiview display are in a plane that crosses the columns of first and second active emitter arrays.

公开(公告)号：US11048036B2

公开(公告)日：2021-06-29

申请号：US16447884

申请日：2019-06-20

Applicant: LEIA INC.

Inventor： Ming Ma ,  David A. Fattal

IPC: G02F1/13357 ,  F21V8/00 ,  G02B27/42 ,  G02B30/26

Abstract: Multiview displays include a reflective support structure located between a backlight and a screen. The backlight includes a plate light guide configured to couple out light that propagates within the plate light guide using multibeam elements. The reflective support structure reflects light incident on a portion of the surface that abuts the reflective support structure back into the plate light guide. The screen includes an array of multiview pixels configured to modulate coupled out light to create a multiview image.

公开(公告)号：US20200319513A1

公开(公告)日：2020-10-08

申请号：US16907239

申请日：2020-06-20

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Xuejian Li

IPC: G02F1/13357 ,  G02F1/13 ,  G02F1/1335

Abstract: A mode-selectable backlight and privacy display employ directional scattering features to provide emitted light. The mode-selectable backlight includes a light guide, a first directional scattering feature to provide broad-angle emitted light from guided light having a first propagation direction within the light guide during a public mode, and a second directional scattering feature to provide directional emitted light from guided light having a second propagation direction within the light guide during a privacy mode. The directional emitted light the provided during the privacy mode is directed into a viewbox. The mode-selectable privacy display further includes light sources configured to provide the guided light having the first and second propagation directions along with an array of light valves configured to modulate the broad-angle emitted light as a public image and the directional emitted light as a private image visible within the viewbox.

公开(公告)号：US10705281B2

公开(公告)日：2020-07-07

申请号：US16336100

申请日：2017-09-28

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Xuejian Li

IPC: F21V8/00

Abstract: A mode-selectable backlight and display employ a plurality of directional scattering features to provide emitted light. The mode-selectable backlight includes a light guide, a first directional scattering feature to provide first emitted light from guided light having a first propagation direction within the light guide in a first operational mode, and a second directional scattering feature to provide second light from guided light having a second propagation direction within the light guide in a second operational mode. The second emitted light comprises a plurality of directional light beams having different principal angular directions from one another and the first propagation direction differing from the second propagation direction. The mode-selectable display further includes a plurality of light sources to provide the guided light and an array of light valves configured to modulate the emitted light as a displayed image.

公开(公告)号：US10649128B2

公开(公告)日：2020-05-12

申请号：US16064441

申请日：2016-06-08

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Xuejian Li

IPC: F21V8/00 ,  H04N13/302

Abstract: A multiview backlight and a multiview display employ multibeam elements configured to provide a plurality of light beams having different principal angular directions corresponding to different view directions of the multiview display. The display includes multiview pixels that include sub-pixels. A size of the multibeam element is comparable to a size of a sub-pixel in a multiview pixel of the multiview display.

公开(公告)号：US20200051513A1

公开(公告)日：2020-02-13

申请号：US16659476

申请日：2019-10-21

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Xuejian Li

IPC: G09G3/34 ,  H04N13/324 ,  H04N13/356 ,  H04N13/398 ,  H04N13/351

Abstract: A multiview backlight and a multiview display employ active emitters configured to provide a plurality of light beams having different principal angular directions corresponding to different view directions of the multiview display. A size of the active emitter is comparable to a size of a view pixel in the multiview display. A distance between active emitters is commensurate with a distance between adjacent multiview pixels of the multiview display. A multiview display further includes an array of light valves configured to modulate the directional light beams to display a multiview image.

公开(公告)号：US20200049878A1

公开(公告)日：2020-02-13

申请号：US16658079

申请日：2019-10-19

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Xuejian Li

IPC: F21V8/00 ,  G02B27/22

Abstract: A multiview backlight and a multiview display employ a microstructured multibeam element to emit a plurality of directional light beams having principal angular directions corresponding to view directions of the multiview display. The multiview backlight includes a light guide and the microstructured multibeam element adjacent and external to a surface of the light guide. The microstructured multibeam element has an input aperture configured to receive a portion of guided light from the light guide and an output aperture configured to emit the plurality of directional light beams. The microstructured multibeam element comprises a microstructure having an interior surface configured to reflect the received guided light portion to provide the plurality of directional light beams at the output aperture. The multiview display includes the multiview backlight and an array of multiview pixels configured to provide different views of the multiview display.

公开(公告)号：US20190196091A1

公开(公告)日：2019-06-27

申请号：US16253160

申请日：2019-01-21

Applicant: LEIA INC.

Inventor： Xuejian Li ,  Ming Ma ,  David A. Fattal

IPC: F21V8/00

CPC classification number: G02B6/0038 ,  G02B6/0028 ,  G02B6/003 ,  G02B6/005

Abstract: A bar collimator and a backlight system employ diffractive coupling to provide a collimated source of illumination to a backlight. The bar collimator includes a light guide and a diffraction grating disposed on a side of the light guide. The light guide is configured to guide light received from a light source as guided light. The diffraction grating is configured to diffractively couple out a portion of the guided light and to direct the diffractively coupled-out portion toward an input of a backlight as a collimated light having an extent corresponding to a length of the backlight input. A backlight system includes the bar collimator and further includes a light source and a backlight adjacent to the light guide of the bar collimator, the backlight being configured to receive collimated light from a diffraction grating of the bar collimator.

公开(公告)号：US20240069268A1

公开(公告)日：2024-02-29

申请号：US18494690

申请日：2023-10-25

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Thomas Hoekman ,  Colton Bukowsky ,  Ming Ma

IPC: F21V8/00

CPC classification number: G02B6/0055

Abstract: A multiview backlight, multiview display, and method of multiview backlight operation include reflective multibeam elements configured to provide emitted light having directional light beams with directions corresponding to view directions of a multiview image. The multiview backlight includes a light guide configured to guide light and an array of the reflective multibeam elements. Each reflective multibeam element includes a plurality of reflective sub-elements and is configured to reflectively scatter out a portion of the guided light as the emitted light. The multiview display includes the multiview backlight and an array of light valves to modulate the directional light beams to provide the multiview image. Each reflective sub-element protrudes from a guiding surface of the light guide by a respective protrusion distance. At least some of the protrusion distances can vary as a function of distance along a length of the light guide.