公开(公告)号：US10684404B2

公开(公告)日：2020-06-16

申请号：US15640173

申请日：2017-06-30

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: F21V8/00 ,  G02B5/18 ,  G02B30/27 ,  G02F1/29 ,  G02B6/124

Abstract: Diffraction grating-based backlighting having controlled diffractive coupling efficiency includes a light guide and a plurality of diffraction gratings at a surface of the light guide. The light guide is to guide light and the diffraction gratings are to couple out a portion of the guided light using diffractive coupling and to direct the coupled-out portion away from the light guide surface as a plurality of light beams at a principal angular direction. Diffraction gratings of the plurality include diffractive features having a diffractive feature modulation configured to selectively control a diffractive coupling efficiency of the diffraction gratings as a function of distance along the light guide surface.

公开(公告)号：US10578793B2

公开(公告)日：2020-03-03

申请号：US15799953

申请日：2017-10-31

Applicant: LEIA INC.

Inventor： James A. Baldwin ,  David A. Fattal

IPC: F21V8/00 ,  G02B5/18 ,  H05B33/08 ,  G02F1/1335

Abstract: Color-scanning grating-based backlighting includes a color scanning protocol to provide different colors of light in different regions of a plate light guide with an intervening dark region. A color-scanning grating-based backlight includes the plate light guide and a diffraction grating configured to diffractively couple out a portion of a guided light beam as a coupled-out light beam directed away from a plate light guide surface at a predetermined principal angular direction. The backlight further includes a multicolor light source configured to provide the different colors of light to the plate light guide as the guided light beam according to the color scanning protocol. Provided light of a first color in a first region is separated from provided light of a second color in a second region one or both by the intervening dark region and by a light-confining wall of the plate light guide.

公开(公告)号：US20200064552A1

公开(公告)日：2020-02-27

申请号：US16114095

申请日：2018-08-27

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: G02B6/293 ,  F21V8/00 ,  H04N13/302

Abstract: Grating-based backlighting includes a light guide and a plurality of reflective grating islands spaced apart from one another and optically coupled to the light guide. The light guide is to guide a light beam at a non-zero propagation angle and a reflective grating island includes a reflection mode diffraction grating that is configured to diffractively couple out a portion of the guided light beam as a coupled-out light beam at a predetermined principal angular direction.

公开(公告)号：US10551546B2

公开(公告)日：2020-02-04

申请号：US15911144

申请日：2018-03-04

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: F21V8/00 ,  G02B27/00 ,  H04N13/366

Abstract: A head-tracking multiview display and a system provide a plurality of views of a scene as a multiview image. The plurality of views includes a set of primary views of the scene and a secondary view representing a perspective view of the scene that is angularly adjacent to the primary view set. The display and system are multibeam diffraction grating-based and configured to selectively provide the primary view set and an augmented set of views that includes the secondary view and a subset of the views of the primary view set based on a tracked position of a user or a user's head. At a first position the display is configured to provide the primary view set and at a second position the display is configured to provide the augmented view set.

公开(公告)号：US20190317265A1

公开(公告)日：2019-10-17

申请号：US16453881

申请日：2019-06-26

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Xuejian Li ,  Francesco Aieta

IPC: F21V8/00 ,  G02B5/18

Abstract: A static multiview display and method of static multiview display operation provide a static multiview image using diffractive gratings to diffractively scatter light from guided light beams having different radial directions. The static multiview display includes a light guide configured to guide plurality of guided light beams and a light source configured to provide the guided light beam plurality having the different radial directions. The static multiview display further includes a plurality of diffraction gratings configured to provide from a portion of the guided light beams directional light beams having intensities and principal angular directions corresponding to view pixels of the static multiview image.

公开(公告)号：US20190302336A1

公开(公告)日：2019-10-03

申请号：US16447901

申请日：2019-06-20

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma

IPC: F21V8/00

Abstract: Multiview backlighting employs a fluorescent multibeam element having a color-tailored emission pattern to provide directional light beams corresponding to a plurality of different views of a multiview image. A multiview backlight includes a light guide configured to guide light as guided light and a fluorescent multibeam element. The fluorescent multibeam element includes a fluorescent material and is configured to provide emitted light having a color-tailor emission pattern from the guided light. The emitted light includes a plurality of directional light beams having different principal angular directions corresponding to respective different view directions of a multiview display and the color-tailored emission pattern corresponds to an arrangement of color sub-pixels of a view pixel in the multiview display.

公开(公告)号：US10345505B2

公开(公告)日：2019-07-09

申请号：US15374895

申请日：2016-12-09

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: G02F1/1335 ,  F21V8/00 ,  G02B27/42 ,  G02B5/18 ,  H04N13/324

Abstract: Multibeam diffraction grating-based color backlighting includes a plate light guide, a multibeam diffraction grating at a surface of the plate light guide, and light sources laterally displaced from one another in a direction corresponding to a propagation axis of the plate light guide. The light sources produce light of different colors. The plate light guide is to guide light from the light sources. The multibeam diffraction grating is to couple out a portion of the guided light using diffractive coupling as a plurality of light beams of different colors in a plurality of different principal angular directions.

公开(公告)号：US20180299608A1

公开(公告)日：2018-10-18

申请号：US16010443

申请日：2018-06-16

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：US20180188691A1

公开(公告)日：2018-07-05

申请号：US15911129

申请日：2018-03-04

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: G03H1/26 ,  F21V8/00 ,  G03H1/22

Abstract: Multiview displays include a backlight and a screen used to form a plurality of multiview pixels. Each multiview pixel includes a plurality of sets of light valves. The backlight includes a light source optically coupled to a plate light guide configured with a plurality of multibeam diffraction gratings. Each multibeam diffraction grating corresponds to a set of light valves and is spatially offset with respect to a center of the set of light valves toward a center of the multiview pixel. The plurality of multibeam diffraction gratings is also configured to diffractively couple out light beams from the plate light guide with different diffraction angles and angular offsets such that at least a portion of the coupled-out light beams interleave and propagate in different view directions of the multiview display.

公开(公告)号：US20180180793A1

公开(公告)日：2018-06-28

申请号：US15904406

申请日：2018-02-25

Applicant: LEIA INC.

Inventor： David A. Fattal

IPC: F21V8/00 ,  G02C7/04 ,  G02B27/01

Abstract: A diffractive backlight system includes a light source and a plate light guide. A surface of the plate light guide is configured with a diffraction grating that couples light out of the plate light guide and concentrates the light into a localized region of space. The diffractive backlight system may be used with at least one light valve array to form a display that generates images for viewing in the localized region of space. The display may be incorporated in head-mounted displays in order to generate focused augmented or virtual reality images for wearers.