公开(公告)号：US10955704B2

公开(公告)日：2021-03-23

申请号：US16848792

申请日：2020-04-14

Applicant: LEIA INC.

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

IPC: G02F1/13357 ,  F21V8/00 ,  G02B6/00

Abstract: A polarized backlight employs a light source configured to provide polarized light and a light guide to guide the polarized light. A polarization-preserving scattering feature optically coupled to the light guide is configured to scatter a portion of the guided polarized light out of the light guide as emitted polarized light. A polarization of the emitted polarized light is determined by a polarization of the guided polarized light.

公开(公告)号：US10942307B2

公开(公告)日：2021-03-09

申请号：US16253160

申请日：2019-01-21

Applicant: LEIA INC.

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

IPC: F21V8/00

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：US20200241342A1

公开(公告)日：2020-07-30

申请号：US16848792

申请日：2020-04-14

Applicant: LEIA INC.

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

IPC: G02F1/13357 ,  F21V8/00 ,  G02B6/00

Abstract: A polarized backlight employs a light source configured to provide polarized light and a light guide to guide the polarized light. A polarization-preserving scattering feature optically coupled to the light guide is configured to scatter a portion of the guided polarized light out of the light guide as emitted polarized light. A polarization of the emitted polarized light is determined by a polarization of the guided polarized light.

公开(公告)号：US10678094B2

公开(公告)日：2020-06-09

申请号：US16338443

申请日：2017-10-04

Applicant: LEIA INC.

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

IPC: G02F1/1335 ,  F21V8/00 ,  G02B6/00 ,  G02F1/13357

Abstract: A polarized backlight employs a light source configured to provide polarized light and a light guide to guide the polarized light. A polarization-preserving scattering feature optically coupled to the light guide is configured to scatter a portion of the guided polarized light out of the light guide as emitted polarized light. A polarization of the emitted polarized light is determined by a polarization of the guided polarized light.

公开(公告)号：US20200059639A1

公开(公告)日：2020-02-20

申请号：US16663167

申请日：2019-10-24

Applicant: LEIA INC.

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

IPC: H04N13/32 ,  H04N13/351 ,  H04N13/354 ,  H04N13/359 ,  F21V8/00

Abstract: A multiview backlight includes a first array active emitters configured to provide a first plurality of directional light beams and a second array of active emitters configured to provide a second plurality of directional light beams. The second array of active emitters is interleaved between active emitters of the first array of active emitters. Further, directional light beams of each of the first and second directional light beam pluralities have directions corresponding to view directions of a multiview display. A multiview display further includes an array of light valves configured to modulate the directional light beams to display a multiview image. An image resolution of the multiview image is configured to be dynamically selectable according to operational mode.

公开(公告)号：US20200033621A1

公开(公告)日：2020-01-30

申请号：US16591551

申请日：2019-10-02

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma

IPC: G02B27/26 ,  F21V8/00 ,  G02B27/28 ,  G09G3/34 ,  G09G3/00 ,  G09G3/36

Abstract: A multiview backlight and mode-switchable backlight employ a planar backlight to emit scattered light and light-blocking layer having a plurality of apertures to provide a plurality of directional light beams from the scattered light. The mode-switchable backlight further includes another planar backlight configured to provide diffuse light in a two-dimensional (2D) operational mode, the plurality of directional light beams being provided in a three-dimensional (3D) mode. A 2D/3D mode-switchable display includes the mode-switchable backlight and a light valve array. A method of backlight operation includes directing scattered light from a planar backlight toward a light-blocking layer having a plurality of apertures and providing a plurality of directional light beams using an aperture of the aperture plurality.

公开(公告)号：US20200012034A1

公开(公告)日：2020-01-09

申请号：US16576685

申请日：2019-09-19

Applicant: LEIA INC.

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

IPC: F21V8/00

Abstract: A backlight and a multiview display employ a light guide having angle-preserving scattering feature and a tapered collimator. The angle-preserving scattering feature is configured to scatter a portion of guided light out of the light guide as emitted light. The tapered collimator is configured to collimate light provided by a light source as collimated light and to communicate the collimated light to the light guide to be guided as the guided light. The collimated light has a collimation factor configured to provide a predetermined angular spread of the guided light, the collimation factor being a function of a taper of the tapered collimator. The multiview display includes multiview pixels that include view pixels as well as the angle-preserving scattering feature that includes a multibeam element having a size that is comparable to a size of a view pixel.

公开(公告)号：US20180172893A1

公开(公告)日：2018-06-21

申请号：US15898621

申请日：2018-02-18

Applicant: LEIA INC.

Inventor： David A. Fattal ,  Ming Ma

IPC: F21V8/00

CPC classification number: G02B6/0016 ,  G02B6/0018 ,  G02B6/0035 ,  G02F1/133621

Abstract: Polychromatic backlighting employs a grating coupler to diffractively split and redirect collimated light coupled into a light guide. A polychromatic grating-coupled backlight includes a light guide configured to guide light and a light source to provide collimated polychromatic light. The polychromatic grating-coupled backlight further includes the grating coupler diffractively split and redirect to provide a plurality of light beams. Each light beam of the plurality represents a respective different color of the polychromatic light and is configured to propagate within the light guide as guided light at a color-specific, non-zero propagation angle corresponding to the respective different color of polychromatic light. An electronic display includes the polychromatic grating-coupled backlight and further includes a diffraction grating to diffractively couple out a portion of the guided light and a light valve array to modulate the coupled-out light as an electronic display pixel.

公开(公告)号：US20180164490A1

公开(公告)日：2018-06-14

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

CPC classification number: G02B6/0031 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0068 ,  G02B19/0028 ,  G02B27/22 ,  G02B27/225 ,  G02B27/30 ,  G02F1/133615 ,  G02F2201/305 ,  G02F2203/12 ,  H04N13/31

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.