公开(公告)号：WO2021201974A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/016661

申请日：2021-02-04

申请人： FACEBOOK TECHNOLOGIES, LLC

发明人： KOSHELEV, Alexander ,  CALAFIORE, Giuseppe

IPC分类号： G02B27/01 ,  F21V8/00 ,  G02B2006/12159 ,  G02B2027/0118 ,  G02B2027/0125 ,  G02B2027/015 ,  G02B2027/0174 ,  G02B26/103 ,  G02B27/0101 ,  G02B27/0172 ,  G02B27/0176 ,  G02B27/1006 ,  G02B6/0016 ,  G02B6/0018 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0056 ,  G02B6/12007 ,  G02B6/28 ,  G02B6/3548 ,  G02B6/3596 ,  G02F1/3137

摘要： A device for providing a 1D line of an image is disclosed. The device is based on a thin slab waveguide coupled to a beam redirecting device such as a tiltable mirror MEMS scanner, a waveguide-based phased array, or a waveguide-based optical switch switching image light between waveguides of a waveguide array coupled to a collimating element formed in the low-mode slab waveguide. The image may be formed by scanning a collimated beam propagating in the slab waveguide, or by forming the 1D singular distribution of brightness at a same time. The device may be used in a near-eye display for forming a 2D image in angular domain.

公开(公告)号：WO2022046814A2

公开(公告)日：2022-03-03

申请号：PCT/US2021/047410

申请日：2021-08-24

申请人： FACEBOOK TECHNOLOGIES, LLC

发明人： ELAZHARY, Tamer ,  TRAIL, Nicholas ,  WHEELWRIGHT, Brian ,  GAO, Weichuan ,  GOLLIER, Jacques ,  SILVERSTEIN, Barry David

IPC分类号： G02B27/01 ,  H04N13/327 ,  G02B2027/0132 ,  G02B2027/015 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B27/0172 ,  G02B27/0176 ,  G02B6/0016 ,  G02B6/0036 ,  H04N13/344 ,  H04N17/004 ,  H04N9/3191

摘要： A self-calibrating display can detect and compensate for binocular disparity or other visual imperfection of the display. The display includes a pair of projection units for projecting test light carrying test images through waveguides, which are normally used to carry images to left and right eyes of a user. A detection unit detects the test light propagated through the waveguides, and extracts the test images. Position of reference features in the detected test images may be used to determine binocular disparity, and luminance and color distribution across the test images may be used to determine the illumination and color uniformity of the images displayed to the user. After the visual defects have been detected, they may be reduced or compensated for by pre-emphasizing or shifting images to be displayed to the left and right eyes of the user. In the embodiment of claim 4, fig.12a-d, the first and second projection units are configured for providing the image light and the test light in a time-sequential manner, wherein the image light carries first and second modified images such that, for each eye of the user, a sum of the respective modified image and the respective test image equals to an image to be displayed to the eye of the user, wherein the detection unit is synchronized with providing the test light by the first and second projection units, for detecting the first and second test images substantially independently on the images to be displayed to the eyes of the user.

公开(公告)号：WO2021260708A2

公开(公告)日：2021-12-30

申请号：PCT/IL2021/050784

申请日：2021-06-27

申请人： LUMUS LTD.

发明人： RONEN, Eitan ,  GROBMAN, Ari ,  GELBERG, Jonathan ,  FROMMER, Aviv ,  GLIKMAN, Eli

IPC分类号： G02B27/00 ,  G02B27/01 ,  B60K35/00 ,  B60K2370/1529 ,  B60K2370/334 ,  B60K2370/336 ,  B60K37/00 ,  B60K37/04 ,  G02B2027/011 ,  G02B2027/0138 ,  G02B2027/014 ,  G02B2027/015 ,  G02B27/0018 ,  G02B27/0081 ,  G02B27/0093 ,  G02B27/0101 ,  G02B27/283

摘要： A vehicular head-up display (HUD) for displaying an image to a user of a vehicle having a windshield (15) includes an image projector (14) outputting a collimated image and an optical aperture expander. The optical aperture expander includes a light-guide optical element (LOE) (10) having two major external surfaces (30a, 30b). The image projector (14) injects the collimated image so as to propagate within the LOE by internal reflection at the major external surfaces. The LOE also has a set of parallel partially-reflecting internal surfaces (12) which progressively couple out the image illumination from the LOE. The optical aperture expander is deployed such that the image illumination coupled-out of the LOE (12) follows a light path including a reflection from a surface associated with the windshield (15) of the vehicle so as to be visible to the user while the user looks at a scene beyond the windshield.

公开(公告)号：WO2022081537A2

公开(公告)日：2022-04-21

申请号：PCT/US2021/054516

申请日：2021-10-12

申请人： COMPOUND PHOTONICS U.S. CORPORATION

发明人： WIERSMA, Joshua ,  MELENA, Nicholas

IPC分类号： G02B27/01 ,  G02B27/28 ,  G02B30/25 ,  G02B2027/0134 ,  G02B2027/015 ,  G02B2027/0185 ,  G02B27/0172 ,  G02B27/283

摘要： Optical display engines with reduced size and/or increased efficiency for Augmented Reality (AR) and near-eye devices that incorporate LED, microLED, and/or OLED displays. Example optical systems provide different light paths for polarized (or split unpolarized) light, with recombining oppositely polarized light corresponding to different image portions/channels, in a compact system using polarized beam splitters, quarter wave plates, half wave plates, and reflective elements such as curved mirrors or reflective lenses, resulting in high optical power. Images and/or portions thereof are presented at multiple observation planes to project a more realistic synthetic image, and at different angular resolutions to enable creation of a large composite field of view with high apparent resolution from a single small and efficient display.

公开(公告)号：WO2021202019A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/019710

申请日：2021-02-25

申请人： FACEBOOK TECHNOLOGIES, LLC

发明人： KOSHELEV, Alexander ,  CALAFIORE, Giuseppe

IPC分类号： G02B27/01 ,  F21V8/00 ,  G02B2006/12159 ,  G02B2027/0118 ,  G02B2027/0125 ,  G02B2027/015 ,  G02B2027/0174 ,  G02B26/103 ,  G02B27/0101 ,  G02B27/0172 ,  G02B27/0176 ,  G02B27/1006 ,  G02B6/0016 ,  G02B6/0018 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0056 ,  G02B6/12007 ,  G02B6/28 ,  G02B6/3548 ,  G02B6/3596 ,  G02F1/3137

摘要： A device for redirecting light in two dimensions (2D) includes a wavelength-tunable light source for providing light having a spectral component at a first wavelength. A 1D redirector redirects the light in a first plane. A thin waveguide is disposed in the first plane. The thin waveguide includes a slab waveguide portion coupled to the 1D redirector for propagating light redirected by the 1D redirector. The slab waveguide portion includes a wavelength-sensitive out-coupler out-coupling the light in a second plane at an angle dependent on the first wavelength. Thus, the light is redirected in two dimensions. A display device providing image in angular domain may be based on the device for redirecting light in two dimensions.

公开(公告)号：WO2021201972A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/016631

申请日：2021-02-04

申请人： FACEBOOK TECHNOLOGIES, LLC

发明人： KOSHELEV, Alexander ,  CALAFIORE, Giuseppe

IPC分类号： G02B27/01 ,  F21V8/00 ,  G02B2006/12159 ,  G02B2027/0118 ,  G02B2027/0125 ,  G02B2027/015 ,  G02B2027/0174 ,  G02B26/103 ,  G02B27/0101 ,  G02B27/0172 ,  G02B27/0176 ,  G02B27/1006 ,  G02B6/0016 ,  G02B6/0018 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0056 ,  G02B6/12007 ,  G02B6/28 ,  G02B6/3548 ,  G02B6/3596 ,  G02F1/3137

摘要： A device for providing a 1D line of an image is disclosed. The device includes a wavelength-tunable light source for providing image light having the angular distribution encoded in optical spectrum. The device further includes a thin slab waveguide having an out-coupler in form of a diffraction grating for out-coupling the image light at an angle dependent on wavelength. The image may be formed by scanning a collimated beam propagating in the slab waveguide when using tunable monochromatic light sources, or by forming the 1D singular distribution of brightness at a same time when using a tunable-spectrum light sources. The device may be used in a near-eye display for forming a 2D image in angular domain.

公开(公告)号：WO2021151814A2

公开(公告)日：2021-08-05

申请号：PCT/EP2021/051562

申请日：2021-01-25

申请人： VIVIDQ LIMITED

发明人： NEWMAN, Alfred James

IPC分类号： G02B27/01 ,  G02B27/28 ,  G02B2027/0145 ,  G02B2027/015 ,  G02B2027/0161 ,  G02B2027/0174 ,  G02B27/0172 ,  G02B27/283

摘要： An optical assembly (1) comprises a light source (11), a light-modulation element (12) for modulating light from the light source (1), and a terminal optical element (13) for directing modulated light from the optical assembly (1). Optical elements are provided to guide the light in a first path from the light source (11) to the light-modulation element (12) and to guide the modulated light in a second path from the light- modulation element (12) to the terminal optical element (13). The first and second paths are of similar shape, for example a c-shape, and are arranged in a nested configuration.