公开(公告)号：US20220236473A1

公开(公告)日：2022-07-28

申请号：US17717071

申请日：2022-04-09

申请人： LEIA INC.

发明人： David A. Fattal ,  Joseph D. Lowney

IPC分类号： F21V8/00 ,  G02B5/18

摘要： A multibeam backlight and multiview display employ a filling fraction of a diffraction grating to control diffractive scattering efficiency. The multibeam backlight includes a light guide configured to guide light and a plurality of multibeam elements, a multibeam element of the multibeam element plurality including a diffraction grating. The multibeam element is configured to diffractively scatter a portion of the guided light out of the light guide as directional light beams having different directions corresponding to different view directions of a multiview display. A filling fraction of diffractive features within the diffraction grating is configured to control a diffractive scattering efficiency of the multibeam element. The multiview display further includes an array of light valves configured to modulate the directional light beams to provide a multiview image. The filling fraction may be a ratio of diffractive features to filling features within the diffraction grating.

公开(公告)号：US20220171118A1

公开(公告)日：2022-06-02

申请号：US17674776

申请日：2022-02-17

申请人： LEIA INC.

发明人： David A. Fattal ,  Ming Ma ,  Joseph D. Lowney

IPC分类号： F21V8/00

摘要： 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：US20220146733A1

公开(公告)日：2022-05-12

申请号：US17580581

申请日：2022-01-20

申请人： LEIA INC.

发明人： David A. Fattal ,  Ming Ma

IPC分类号： F21V8/00

摘要： A collimated backlight and an electronic display employ a light guide having angle-preserving scattering feature and an absorption collimator. The angle-preserving scattering feature is configured to scatter a portion of guided light out of the light guide as emitted light. The absorption collimator includes an absorption element and is configured to convert light provided by a light source into collimated light to be guided as the guided light. The electronic display includes an array of light valves and may be configured as a multiview display or a privacy display.

公开(公告)号：US11327236B2

公开(公告)日：2022-05-10

申请号：US16822795

申请日：2020-03-18

申请人： LEIA INC.

发明人： Xuejian Li ,  David A. Fattal ,  Francesco Aieta

IPC分类号： G02B6/293 ,  F21V8/00

摘要： A grating-coupled light guide concentrates light and diffractively redirects the concentrated light at a non-zero propagation angle as guided light having a predetermined spread angle. The grating-coupled light guide includes a light guide, an optical concentrator, and a grating coupler. The optical concentrator is configured to concentrate light from a light source as concentrated light and the grating coupler is configured to diffractively redirect the concentrated light into the light guide as the guided light. Characteristics of the optical concentrator and grating coupler are configured in combination to determine the non-zero propagation angle and predetermined spread angle. A grating-coupled display system further includes an array of light valves configured to modulate emitted light as a displayed image.

公开(公告)号：US11200855B2

公开(公告)日：2021-12-14

申请号：US16568155

申请日：2019-09-11

申请人： LEIA INC.

发明人： David A. Fattal

IPC分类号： G09G3/34 ,  F21V8/00

摘要： A mode-switchable backlight and mode-switchable privacy display provide narrow-angle emitted light during a first mode and broad-angle emitted light in a second mode, the broad-angle emitted light being a combination of the narrow-angle emitted light and bidirectional emitted light. The mode-switchable backlight includes a first directional backlight and a second directional backlight. The first directional backlight is configured to provide the narrow-angle emitted light during both of the first mode and second mode, while the second directional backlight is configured to provide the bidirectional emitted light exclusively during the second mode. The mode-switchable privacy display includes an array of light valves configured to modulate the narrow-angle emitted light as a private displayed image during the first or privacy mode and to modulate broad-angle emitted light as a public displayed image during the second or public mode.

公开(公告)号：US11169391B2

公开(公告)日：2021-11-09

申请号：US16591551

申请日：2019-10-02

申请人： LEIA INC.

发明人： David A. Fattal ,  Ming Ma

IPC分类号： G02B6/10 ,  G02B30/25 ,  F21V8/00 ,  G02B27/28 ,  G09G3/00 ,  G09G3/34 ,  G09G3/36

摘要： 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：US20210306619A1

公开(公告)日：2021-09-30

申请号：US17346121

申请日：2021-06-11

申请人： LEIA INC.

发明人： David A. Fattal

IPC分类号： H04N13/32 ,  H04N13/373

摘要： A multiview display includes a multiview backlight configured to emit directional light beams configured to converge at points within a convergence plane, and an array of light valves configured to modulate the directional light beams at the convergence plane. A distance between the multiview backlight and the light valve array is configured to be adjustable to shift a corresponding location of the convergence plane relative to the multiview display.

公开(公告)号：US20210302630A1

公开(公告)日：2021-09-30

申请号：US17344740

申请日：2021-06-10

申请人： LEIA INC.

发明人： David A. Fattal

IPC分类号： G02B5/18 ,  F21V8/00 ,  G02B27/30

摘要： A multiple view-zone static multiview display employs diffraction gratings configured to provide directional light beams having principal angular directions for views of multiview images of the static multiview display. The multiple view-zone static multiview display includes a light guide that guides light from a light source. The light source may include an optical emitter, which may be offset in a longitudinal direction. The optical emitter of the light source provides within the light guide a collimated guided light beam having a propagation angle determined by the longitudinal offset of the optical emitter. Moreover, different sets of diffraction gratings scatter or diffract out different portions of the collimated guided light beam as different pluralities of directional light beams representing the multiview images into different view zones. These view zones may have different, non-overlapping angular ranges, which may be separated by a blank zone.

公开(公告)号：US20210208328A1

公开(公告)日：2021-07-08

申请号：US17194300

申请日：2021-03-07

申请人： LEIA INC.

发明人： David A. Fattal

IPC分类号： F21V8/00 ,  G02B1/12

摘要： Time-multiplexed backlighting includes a time-multiplexed light source to provide a light beam having a first non-zero propagation angle during a first time interval and a second non-zero propagation angle during a second time interval. A time-multiplexed backlight includes a light guide configured to guide the light beam and a diffraction grating configured to coupled out a portion of the guided light beam with a different principal angular direction in each of the first time interval and the second time interval. A multiview display includes the time-multiplexed light source and a multibeam backlight to provide coupled-out light beams during each of the first and second time intervals, wherein the principal angular directions of the coupled-out light beams correspond to different view directions of the multiview display.

公开(公告)号：US20210200150A1

公开(公告)日：2021-07-01

申请号：US17200681

申请日：2021-03-12

申请人： LEIA INC.

发明人： David A. Fattal

IPC分类号： G03H1/00 ,  G06F3/01 ,  G06F3/0481

摘要： A holographic reality system and multiview display monitor a user position and provide virtual haptic feedback to the user. The holographic reality system includes a multiview display configured to display a multiview image, a position sensor configured to monitor the user position, and a virtual haptic feedback unit configured to provide the virtual haptic feedback. An extent of the virtual haptic feedback corresponds to an extent of a virtual control within the multiview image. The holographic reality multiview display includes an array of multiview pixels configured to provide different views of the multiview image by modulating directional light beams having directions corresponding to the different views and an array of multibeam elements configured to provide the directional light beams to corresponding multiview pixels.