公开(公告)号：US10725226B2

公开(公告)日：2020-07-28

申请号：US15894512

申请日：2018-02-12

Applicant: LEIA INC.

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

IPC: F21V8/00 ,  G02B5/18 ,  G02B19/00 ,  G02B30/00 ,  G02B27/30

Abstract: Dual-direction collimation and a dual-direction optical collimator provide dual-direction collimated light at a non-zero propagation angle. The dual-direction collimator includes a vertical collimator configured to collimate light in a vertical direction and a horizontal collimator configured to collimate the vertically collimated light in a horizontal direction. The horizontal collimator is located at an output of the vertical collimator. A three-dimensional (3D) display includes the dual-direction collimator, a plate light guide and an array of multibeam diffraction gratings at a surface of the plate light guide to couple out the dual-direction collimated light guided in the plate light guide as a plurality of light beams corresponding to different 3D view of the 3D electronic display.

公开(公告)号：US20200150489A1

公开(公告)日：2020-05-14

申请号：US16742740

申请日：2020-01-14

Applicant: LEIA INC.

Inventor： Ming Ma ,  David A. Fattal ,  Francesco Aieta

IPC: G02F1/13357 ,  F21V8/00 ,  G02B5/18

Abstract: A multiview backlight and a multiview display employ a microlens to adjust directional light beams to have directions corresponding to respective different view directions of the multiview display. The multiview backlight includes a light guide configured to guide light as guided light, a multibeam element configured to scatter from the light guide a portion of the guided light as a plurality of directional light beams, and the microlens configured to adjust directions of the directional light beams. The multiview display further includes a multiview pixel configured to modulate the plurality of directional light beams and provide a plurality of different views of the multiview display, the microlens being between the multibeam element and the multiview pixel.

公开(公告)号：US20200018886A1

公开(公告)日：2020-01-16

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：US10459147B2

公开(公告)日：2019-10-29

申请号：US15894565

申请日：2018-02-12

Applicant: LEIA INC.

Inventor： Ming Ma ,  David A. Fattal

IPC: F21V8/00 ,  G02B27/30 ,  G02B27/22 ,  H04N13/31 ,  G02B19/00 ,  G02F1/1335

Abstract: Dual-direction collimation and a dual surface collimator provide dual-direction collimated light at a non-zero propagation angle. The dual surface collimator includes an entrance surface and a reflector surface each having a curved shape. The entrance surface is configured to refract incident light and the reflector surface is configured to reflect the refracted light back toward the entrance surface. The entrance surface is further configured to re-reflect the reflected light by total internal reflection toward an output aperture. Curved shapes and relative orientation of the entrance and reflector surfaces, in combination, are configured to convert the incident light into dual-direction collimated light having the non-zero propagation angle. A three-dimensional (3D) display includes the dual surface collimator, a plate light guide and an array of multibeam diffraction gratings to provide a plurality of light beams corresponding to different 3D view of the display.

公开(公告)号：US20180164489A1

公开(公告)日：2018-06-14

申请号：US15894512

申请日：2018-02-12

Applicant: LEIA INC.

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

IPC: F21V8/00 ,  G02B27/30 ,  G02B27/22

Abstract: Dual-direction collimation and a dual-direction optical collimator provide dual-direction collimated light at a non-zero propagation angle. The dual-direction collimator includes a vertical collimator configured to collimate light in a vertical direction and a horizontal collimator configured to collimate the vertically collimated light in a horizontal direction. The horizontal collimator is located at an output of the vertical collimator. A three-dimensional (3D) display includes the dual-direction collimator, a plate light guide and an array of multibeam diffraction gratings at a surface of the plate light guide to couple out the dual-direction collimated light guided in the plate light guide as a plurality of light beams corresponding to different 3D view of the 3D electronic display.

公开(公告)号：US20250044492A1

公开(公告)日：2025-02-06

申请号：US18713303

申请日：2021-12-07

Applicant: LEIA Inc.

Inventor： David A. Fattal ,  Ming Ma

IPC: F21V8/00

Abstract: A backlight system, multiview display system, and method of backlight system operation employ light extraction elements to extract guided light from a first light guide and provide the extracted light to a second light guide. The backlight system includes the first light guide and light extraction elements spaced apart along a length of the first light guide. The light extraction elements are configured to extract portions of the guided light from the first light guide to form extracted light portions. The backlight further includes the second light guide configured to combine the extracted light received from the plurality of light extraction elements to form combined guided light. A multiview display system includes multibeam elements configured to scatter light out of multiview backlight that receives the extracted light, the scattered-out light including directional light beams having directions corresponding to view directions of the multiview display.

公开(公告)号：US20250013070A1

公开(公告)日：2025-01-09

申请号：US18713379

申请日：2021-12-07

Applicant: LEIA Inc.

Inventor： Ming Ma ,  David A. Fattal

IPC: G02B30/33 ,  F21V8/00

Abstract: A time-multiplexed multiview backlight, display, and method of time-multiplexed multiview backlight operation provide one or both of enhanced spatial resolution and enhanced angular resolution using time-multiplexing. The time-multiplexed multiview backlight includes a light guide configured to guide light as time-multiplexed guided light having different directions during different time intervals and an array of multibeam elements configured to scatter the time-multiplexed guided light as directional light beams. A first set of multibeam elements is configured to selectively scatter out the time-multiplexed guided light having the first direction and a second set of multibeam elements of the multibeam element array is configured to selectively scatter out the time-multiplexed guided light having the second direction. The time-multiplexed multiview display further includes an array of light valves configured to modulate the directional light beams as view pixels of a multiview image having different views in the different view directions.

公开(公告)号：US12189168B2

公开(公告)日：2025-01-07

申请号：US17674776

申请日：2022-02-17

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma ,  Joseph D. Lowney

IPC: F21V8/00

Abstract: A backlight scattering element, multiview display, and method of backlight scattering element operation employ a high-index light guide layer in conjunction with a light guide and diffraction grating to provide emitted light. The backlight scattering element includes a light guide that guides light as guided light and a high-index light guide layer optically connected to the light guide and configured to extend a thickness of the light guide. The backlight scattering element also includes a diffraction grating adjacent to the high-index light guide layer to diffractively scatter out a portion of the guided light as emitted light. The multiview display includes a light guide having a first layer and a second layer, a refractive index of the second layer being greater than a refractive index of the first layer. The multiview display may modulate diffractively scattered out directional light beams to provide a multiview image.

公开(公告)号：US12124073B2

公开(公告)日：2024-10-22

申请号：US17509036

申请日：2021-10-24

Applicant: LEIA INC.

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

IPC: F21V8/00 ,  B29D11/00 ,  G03F7/00 ,  G03F7/11 ,  G03F7/20

CPC classification number: G02B6/0065 ,  B29D11/00769 ,  G02B6/0036 ,  G02B6/0051 ,  G02B6/0055 ,  G03F7/0002 ,  G03F7/001 ,  G03F7/11 ,  G03F7/2008

Abstract: Fabricating a diffractive backlight employs a universal grating and selects a portion of the universal grating using a reflective island to define a grating element, a reflective diffraction grating element of the diffractive backlight including the grating element and the reflective island. A method of fabricating a diffractive backlight includes forming the universal grating, forming the reflective island, and selecting a portion of the universal grating using the reflective island to define the grating element. The method of fabricating a diffractive backlight may include forming the reflective island on a light guide surface and forming the universal grating over the reflective island. Alternatively, the method of fabricating a diffractive backlight may include forming the universal grating on the light guide surface and forming the reflective island over the universal grating.

公开(公告)号：US12117693B2

公开(公告)日：2024-10-15

申请号：US18143466

申请日：2023-05-04

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 and a diffuser to provide an effective active emitter from emitted light from each active emitter. The multiview backlight includes an array of active emitters and a diffuser configured to provide effective active emitters having a predetermined size that is between one quarter and two times a size of a light valve of the multiview display. The multiview display includes an array of effective active emitters including active emitters and a diffuser configured to provide output emitted light. The multiview display further includes an array of light valves configured to modulate output emitted light to provide a displayed image. A spacing between effective active emitters is an integer multiple of a spacing between light valves of the multiview display.