-
公开(公告)号:US11846774B2
公开(公告)日:2023-12-19
申请号:US17697592
申请日:2022-03-17
Applicant: Meta Platforms 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
IPC: G02B27/00 , G02B27/01 , G06F3/01 , G02F1/29 , F21V8/00 , G02B6/35 , G02F1/1335 , G09G3/00 , G09G3/34 , G06T7/246 , H04N23/56 , G02F1/335 , G03H1/02 , G06F1/16 , H04N23/698 , G01B11/22 , G01S7/4865 , G01S17/10 , G02B27/42 , G02F1/33 , G06T3/40 , G02B27/44 , G02B26/08 , H04N23/10
CPC classification number: G02B27/0093 , G01B11/22 , G01S7/4865 , G01S17/10 , G02B6/005 , G02B6/0016 , G02B6/0031 , G02B6/0035 , G02B6/0066 , G02B6/3518 , G02B26/0816 , G02B27/0081 , G02B27/0172 , G02B27/0179 , G02B27/4205 , G02B27/44 , G02F1/133504 , G02F1/133526 , G02F1/292 , G02F1/294 , G02F1/33 , G02F1/335 , G03H1/0248 , G06F1/163 , G06F3/013 , G06T3/4038 , G06T7/246 , G09G3/002 , G09G3/3413 , H04N23/56 , H04N23/698 , G02B2027/0105 , G02B2027/0138 , G02B2027/0174 , G02B2027/0178 , G02B2027/0187 , G06T2207/30201 , G09G2310/0235 , H04N23/10
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.
-
公开(公告)号:US20230258923A1
公开(公告)日:2023-08-17
申请号:US17825661
申请日:2022-05-26
Applicant: Meta Platforms Technologies, LLC
Inventor: Brian Wheelwright , Daniel Guenther Greif , Jacques Gollier
CPC classification number: G02B26/101 , G02B26/0816
Abstract: A scanning projector is disclosed, including a light engine for providing a light beam, a beam scanner for scanning the light beam about two axes, and a controller operably coupled to the light engine and the beam scanner and configured to cause the beam scanner to non-linearly scan the light beam about the first and second axes within the field of view while varying brightness of the light beam to provide the image. The nonlinear scanning is performed such that consecutive scans provide conterminous portions of the image. This enables one to increase a local rate of providing the image across at least 75% of an area of the field of view is greater than 1500 degrees per second. The high local rate results in a significant reduction of artifacts caused by motion of displayed object, the users eyes or head, etc.
-
公开(公告)号:US12270989B2
公开(公告)日:2025-04-08
申请号:US17682800
申请日:2022-02-28
Applicant: Meta Platforms Technologies, LLC
Abstract: An apparatus, system, and method for micro-electro-mechanical system (MEMS) micromirror including a plurality of stiffening structures is described. The MEMS micromirror includes a mirror surface to reflect light, a support platform coupled along a mirror surface, and a plurality of stiffening structures formed from or coupled to the support platform. In some examples, a dimensionality or density of the stiffening structures scale across an area of the support platform in a manner to assist in keeping the mirror surface flat under torsional force.
-
4.
公开(公告)号:US20240337832A1
公开(公告)日:2024-10-10
申请号:US18130550
申请日:2023-04-04
Applicant: Meta Platforms Technologies, LLC
Inventor: Daniel Guenther Greif , Brian Wheelwright , Zachary Kehs
CPC classification number: G02B27/0031 , G02B26/10
Abstract: Static non-uniformity effects in a coherent biresonant scanning projector are mitigated through correction factors for pulse events during one frame time. According to an analytical approach, a set of input parameters such as scan angle, micro-electromechanical system (MEMS) obliquity, ridge spacing, etc. are used to optimize color-wise luminance uniformity. According to an optimization approach, pulse correction factors are determined using a custom-defined cost function that attempts to optimize for both luminance and color uniformity.
-
公开(公告)号:US20230271823A1
公开(公告)日:2023-08-31
申请号:US18049759
申请日:2022-10-26
Applicant: Meta Platforms Technologies, LLC
Inventor: Katherine Marie Smyth , Kenneth Alexander Diest , Brian Wheelwright , Daniel Guenther Greif
CPC classification number: B81B3/0021 , G02B26/0858 , B81B2201/042 , B81B2203/0118 , B81B2203/04 , B81B2203/06
Abstract: A direct drive scanning micromirror includes a mirror body defining a mirror surface, and a plurality of curved cantilevers that each extend directly from the mirror body. The shape of the cantilevers and the geometry of the interface between the cantilevers and the mirror body are configured to decrease peak stresses within the micromirror during operation, which may beneficially impact performance and lifetime.
-
公开(公告)号:US11627291B2
公开(公告)日:2023-04-11
申请号:US16450271
申请日:2019-06-24
Applicant: Meta Platforms Technologies, LLC
Inventor: Daniel Guenther Greif , James Laudolff
Abstract: A scanning projector display includes a light engine comprising N emitters coupled to a collimator for providing a fan of N light beams of variable optical power levels, where N>1. The N emitters are spaced apart from each other such that pixels of the image simultaneously energized by neighboring ones of the N emitters are non-adjacent. A scanner receives and angularly scans the fan of N light beams about first and second non-parallel axes to provide an image in angular domain. A controller coupled to the scanner and the light engine causes the scanner to simultaneously scan the fan of N light beams about the first and second axes, and cause the light engine to vary the optical power levels of the N emitters with time delays such that adjacent pixels of the image are energized by different ones of the N emitters.
-
公开(公告)号:US20230273424A1
公开(公告)日:2023-08-31
申请号:US17682800
申请日:2022-02-28
Applicant: META PLATFORMS TECHNOLOGIES, LLC
CPC classification number: G02B26/0833 , G02B26/101 , B81B3/007 , B81C1/00658 , B81B2201/042
Abstract: An apparatus, system, and method for micro-electro-mechanical system (MEMS) micromirror including a plurality of stiffening structures is described. The MEMS micromirror includes a mirror surface to reflect light, a support platform coupled along a mirror surface, and a plurality of stiffening structures formed from or coupled to the support platform. In some examples, a dimensionality or density of the stiffening structures scale across an area of the support platform in a manner to assist in keeping the mirror surface flat under torsional force.
-
公开(公告)号:US11714282B2
公开(公告)日:2023-08-01
申请号:US16506899
申请日:2019-07-09
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor: Wanli Chi , Chadwick Brian Martin , Scott Charles McEldowney , Maxwell Parsons , Stephen James McNally , Daniel Guenther Greif
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B27/0176 , G02B2027/0178
Abstract: A light source includes a first set of source elements and a second set of source elements. A respective set of source elements is disposed on a respective substrate and electrically coupled to a respective set of circuit pads formed on a respective top surface of the respective substrate by respective bond wires. At least a portion of the respective top surfaces face each other and are spaced apart from each other to accommodate at least some of the first set of source elements, at least some of the second set of source elements, and at least some of the bond wires. The display device that includes a light source configured to output image light, an optical assembly configured to collimate the image light, a scanning assembly configured to steer the image light, and an output device configured to output the image light for displaying images is also disclosed.
-
公开(公告)号:US20230024805A1
公开(公告)日:2023-01-26
申请号:US17959838
申请日:2022-10-04
Applicant: Meta Platforms Technologies, LLC
Inventor: Daniel Guenther Greif , Scott Charles McEldowney , Stephen John Holmes , Chadwick Brian Martin , Stephen James McNally , John Goward
Abstract: A light source or projector for a near-eye display includes a light source subassembly optically coupled to a waveguide concentrator. The light source subassembly may include several semiconductor chips each hosting an array of emitters such s superluminescent light-emitting diodes. The semiconductor chips may be disposed side-by-side, with their emitting sides or facets coupled to the waveguide concentrator, which provides a tight array of output light ports on a common output plane of the concentrator. The output diverging beams at the array of output light ports are coupled to a collimator, which collimates the beams and couples them to an angular scanner for scanning the collimated light beams together across the field of view of the display.
-
公开(公告)号:US11960092B2
公开(公告)日:2024-04-16
申请号:US17959838
申请日:2022-10-04
Applicant: Meta Platforms Technologies, LLC
Inventor: Daniel Guenther Greif , Scott Charles McEldowney , Stephen John Holmes , Chadwick Brian Martin , Stephen James McNally , John Goward
CPC classification number: G02B27/0172 , G02B6/005 , G02B6/0085 , G02B6/26 , G02B26/0833 , G02B26/101 , G02B27/0176 , G02B2027/015 , G02B2027/0178 , H01L25/0753
Abstract: A light source or projector for a near-eye display includes a light source subassembly optically coupled to a waveguide concentrator. The light source subassembly may include several semiconductor chips each hosting an array of emitters such s superluminescent light-emitting diodes. The semiconductor chips may be disposed side-by-side, with their emitting sides or facets coupled to the waveguide concentrator, which provides a tight array of output light ports on a common output plane of the concentrator. The output diverging beams at the array of output light ports are coupled to a collimator, which collimates the beams and couples them to an angular scanner for scanning the collimated light beams together across the field of view of the display.
-
-
-
-
-
-
-
-
-