-
公开(公告)号：US20230133264A1
公开(公告)日：2023-05-04
申请号：US17519391
申请日：2021-11-04
Applicant: Facebook Technologies, LLC
Inventor： Babak Amirsolaimani , Sihui He
Abstract: A waveguide, e.g. a pupil-replicating waveguide, is provided. The waveguide includes a substrate having two outer surfaces, for propagating a beam of light in the substrate by reflecting the beam from the outer surfaces. An output coupler, such as a diffraction grating in the substrate, is configured for diffracting the impinging beam out of the substrate. A beam splitter is disposed in the substrate between the outer surfaces upstream of the output coupler, so as to avoid substantially intersecting the output beam. The partial reflector is configured for splitting the impinging beam, increasing the number of beam portions in the waveguide, thereby improving output pupil density.
-
2.发明公开公开(公告)号：US20230176380A1
公开(公告)日：2023-06-08
申请号：US17698996
申请日：2022-03-18
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
CPC classification number: G02B27/0172 , G02B27/44 , G02B27/0179 , G02B2027/0105 , G02B2027/0174 , G02B2027/0178 , G02B2027/0187
Abstract: A pupil-replicating lightguide includes a slab of transparent material for guiding image light in the slab, and an out-coupling structure supported by the slab for out-coupling portions of the image light from the slab. The portions are laterally offset from one another along a path of the image light in the slab. The out-coupling grating structure has a switchable distribution of out-coupling efficiency for redirecting the portions of out-coupled light to a desired location such as a current location of an eye of the viewer determined by an eye tracking system. The out-coupling grating structure may include a plurality of diffraction gratings having different local slant angles of grating fringes.
-
公开(公告)号：US20230176370A1
公开(公告)日：2023-06-08
申请号：US17697592
申请日：2022-03-17
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
CPC classification number: G02B27/0093 , G02B27/0172 , G06F3/013
Abstract: A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.
-
Patent Agency Ranking
公开(公告)号：US20230185091A1
公开(公告)日：2023-06-15
申请号：US17549394
申请日：2021-12-13
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Maxwell Parsons , Fenglin Peng , Miaomiao Xu , Yang Yang , Yu Shi , Dianmin Lin
CPC classification number: G02B27/0172 , G02B6/4206 , G02B6/4213 , G02B2027/0174 , G02B2027/0178
Abstract: A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.
-
公开(公告)号：US20230176444A1
公开(公告)日：2023-06-08
申请号：US17697600
申请日：2022-03-17
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
CPC classification number: G02F1/292 , G02B27/0172 , G02F1/335 , G03H1/0248 , G06F1/163 , G06F3/013 , G06T7/246 , H04N5/2256 , G02B2027/0138 , G02B2027/0174 , G02B2027/0187 , G06T2207/30201
Abstract: A switchable grating may be used to redirect illuminating light for illuminating a user’s eye in an eye tracking system, to facilitate the determination of eye position and/or orientation. The eye tracking system may be used in a near-eye display. An eye tracking camera obtains an eye image, and a controller performs an initial determination of the eye position. The controller may switch the switchable grating to direct the illuminating light beam onto the eye, for a better position and/or eye orientation determination.
-
公开(公告)号：US20230176377A1
公开(公告)日：2023-06-08
申请号：US17671446
申请日：2022-02-14
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Guenther Chi , Daniel Guenther Grief , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
IPC: G02B27/01 , G02B27/00 , G02F1/1335 , G02B26/08
CPC classification number: G02B27/0172 , G02B26/0816 , G02B27/0093 , G02F1/133504 , G02B2027/0174 , G02B2027/0178
Abstract: A directional illuminator for a display apparatus includes a switchable diffuser for tuning a divergence of a light beam illuminating a display panel of the display apparatus. The tunable divergence of the illuminating light beam translates into a tunable exit pupil size at the eyebox of the display apparatus, which may be matched to a pupil size of a user’s eye, thus providing a configurable illumination of the eye pupil. A tiltable reflector in an optical path of the illuminating light beam may be used to shift the location of the exit pupil at the eyebox of the display apparatus.
-
公开(公告)号：US20230176368A1
公开(公告)日：2023-06-08
申请号：US17701558
申请日：2022-03-22
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
IPC: G02B27/00 , G02B27/42 , G02B27/01 , G02F1/29 , G02F1/33 , H04N5/232 , G06F3/01 , G06T3/40 , G01B11/22 , G01S17/10 , G01S7/4865
CPC classification number: G02B27/0081 , G02B27/4205 , G02B27/0172 , G02B27/0093 , G02F1/292 , G02F1/33 , H04N5/23238 , G06F3/013 , G06T3/4038 , G01B11/22 , G01S17/10 , G01S7/4865 , G02B2027/0178 , G02B2027/0138 , G02B2027/0174 , H04N9/04
Abstract: A field of view of an imaging or ranging device may be increased multiple times by providing a switchable diffraction grating structure upstream of an imaging camera or ranging light source. The switchable diffraction grating changes the angle of propagating of incoming light by a fixed step, enabling the device to switch between several portions of a compound field of view. The switchable diffraction grating structure may be supported by a lightguide that guides the image light or ranging light by a series of reflections from opposed surfaces of the lightguide.
-
公开(公告)号：US20230176274A1
公开(公告)日：2023-06-08
申请号：US17699012
申请日：2022-03-18
Applicant: Facebook Technologies, LLC
Inventor： Sihui He , Jacques Gollier , Maxwell Parsons , Babak Amirsolaimani , Wanli Chi , Daniel Guenther Greif , Renate Eva Klementine Landig , Xiayu Feng , Zhimin Shi , Nicholas John Diorio , Yang Yang , Giuseppe Calafiore , Fenglin Peng , Tanya Malhotra , Andrew John Ouderkirk
CPC classification number: G02B6/005 , G02B6/0031 , G02F1/294
Abstract: An illuminator for a display panel includes a slab of transparent material for propagating illuminating light between outer surfaces of the slab, an out-coupler supported by the slab for out-coupling portions of the illuminating light along one of the outer surfaces of the slab, and a tunable microlens array for forming an array of light spots from the out-coupled illuminating light portions downstream of the focusing element for illuminating pixels of the display panel. The array of light spots may be repeated at a distance from the tunable microlens array due to Talbot effect. The display panel may be illuminated in a color-sequential manner, and the tunable microlens array may be used to adjust the focal plane position for each color channel individually.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.013 seconds)
