-
公开(公告)号：US10650785B1
公开(公告)日：2020-05-12
申请号：US16281778
申请日：2019-02-21
Applicant: Microsoft Technology Licensing, LLC
Inventor： Pietari Tuomisto , William J. Cummings , Dmitry Reshidko , Tuomas Vallius , David Douglas Bohn
Abstract: MicroLED arrays offer a small form factor solution for the HMD image sources since they do not need a separate illumination optics. Features of the present disclosure implement a MicroLED display system that incorporate a plurality of monochrome projectors (e.g., three MicroLED projectors) to generate three monochrome images (e.g., red, blue, and green images) that are separately input into a single waveguide of the HMD and combined to form an image that is displayed to the user. By utilizing a single waveguide that includes a plurality of spatially separated input regions (e.g., a region for inputting blue light, a region for inputting red light, a region for inputting green light), the MicroLED display system of the present disclosure may reduce the form factor of the HMD device because of the reduced number of plates that may be required to combine the three monochrome images.
-
22.发明授权公开(公告)号：US10429645B2
公开(公告)日：2019-10-01
申请号：US14877281
申请日：2015-10-07
Applicant: Microsoft Technology Licensing, LLC
Inventor： Tuomas Vallius
Abstract: In an optical near eye display system, a monolithic three-dimensional optical microstructure is formed by a waveguide substrate with at least one DOE having grating regions that integrate the functions of in-coupling of incident light into the waveguide, exit pupil expansion in one or two directions, and out-coupling of light from the waveguide within a single optical element. An in-coupling region of the DOE couples the incident light into the waveguide and to a beam steering and out-coupling region. The beam steering and out-coupling region provides exit pupil expansion and couples light out of the waveguide. The beam steering and out-coupling region of the DOE can be configured with a two-dimensional (2D) grating that is periodic in two directions.
-
公开(公告)号：US10353202B2
公开(公告)日：2019-07-16
申请号：US15177749
申请日：2016-06-09
Applicant: Microsoft Technology Licensing, LLC
Inventor： Jani Tervo , Tuomas Vallius
Abstract: An apparatus having optical waveguides for providing a large FOV is disclosed. A first light engine projects light into an input diffractive coupler of a first waveguide at a first central angle. An output coupler of the first waveguide projects the light out of the first optical waveguide. A second light engine projects light into an input diffractive coupler of a second waveguide at a second central angle that is greater than the first central angle. An output coupler of the second waveguide projects the light out of the second optical waveguide to intersect with the light projected out of the first optical waveguide. The first waveguide may be used to project a first part of an image into a central portion of a user's vision. The second waveguide may be used to project a second part of the image into a peripheral portion of the user's vision.
-
公开(公告)号：US10038840B2
公开(公告)日：2018-07-31
申请号：US14813245
申请日：2015-07-30
Applicant: Microsoft Technology Licensing, LLC
Inventor： Tuomas Vallius
CPC classification number: H04N5/23229 , G02B27/0081 , G02B27/0172 , G02B27/4205 , G02B27/4272 , G02B2027/0138 , G02B2027/014 , H04N5/2254
Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), an in-coupling DOE couples light into the waveguide, an intermediate DOE provides exit pupil expansion in a first direction, and an out-coupling DOE provides pupil expansion in a second direction and couples light out of the waveguide. The intermediate DOE is configured with a crossed grating which is a three-dimensional microstructure that is periodic in two directions. The crossed grating provides multiple optical paths to a given point in the DOE in which differences in optical path lengths are larger than the coherence length. The crossed grating in the intermediate DOE may provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. The crossed grating can further enable the optical display system to be more tolerant to manufacturing variations.
-
公开(公告)号：US09939647B2
公开(公告)日：2018-04-10
申请号：US15186763
申请日：2016-06-20
Applicant: Microsoft Technology Licensing, LLC
Inventor： Tuomas Vallius , Pasi Petteri Pietilae
CPC classification number: G02B27/0172 , G02B5/1842 , G02B6/0016 , G02B6/0035 , G02B27/0081 , G02B27/4205 , G02B27/4261 , G02B2027/0125 , G02B2027/0132
Abstract: An extended field of view (FOV) is provided by an exit pupil expander in a near-eye display system that uses a waveguide with multiple diffractive optical elements (DOEs) for in-coupling light, expanding the pupil in two directions, and out-coupling light to a system user's eye. Left and right in-coupling DOEs in-couple pupils respectively produced by a pair of imagers—one imager provides a left portion of the FOV and the other imager provides the right portion. The left portion and right portion of the FOV respectively propagate in a left and right intermediate DOEs which expand the pupil in a first direction and diffract light to an out-coupling DOE. The out-coupling DOE expands the pupil in a second direction, stitches the extended FOV together by combining the left and right portions of the FOV produced by the imagers, and out-couples the extended FOV to the user's eye.
-
Patent Agency Ranking
公开(公告)号：US09891436B2
公开(公告)日：2018-02-13
申请号：US15041664
申请日：2016-02-11
Applicant: Microsoft Technology Licensing, LLC
Inventor： R. Andrew Wall , Tuomas Vallius , Pasi Pietila , Keita Oka
CPC classification number: G02B27/0172 , G02B1/115 , G02B5/26 , G02B6/0026 , G02B6/0035 , G02B6/0076 , G02B2027/0112 , G02B2027/012 , G02B2027/0125
Abstract: A near eye or heads up display system includes a display engine, at least two optical waveguides, and a respective coating on at least one of the major surfaces of at least one of the waveguides. At least one such coating has a low reflectance for light within a specific wavelength range for the waveguide and incident on a major surface of the waveguide on which the coating is located at an angle below a low threshold angle relative to a normal, and has a high reflectance for light within the specific wavelength range for the waveguide that is incident on the major surface on which the coating is located at an angle above a high threshold angle relative to the normal.
-
公开(公告)号：US10983346B2
公开(公告)日：2021-04-20
申请号：US15698456
申请日：2017-09-07
Applicant: Microsoft Technology Licensing, LLC
Inventor： Tuomas Vallius , Adrian Travis , Tero Ollikainen , Dmitry Reshidko
Abstract: Apparatuses and systems including curved optical waveguides, and methods for use include an output-grating of a curved waveguide that includes a spatially modulated grating period configured to cause, for each beam of light corresponding to an image coupled into a bulk-substrate of the curved waveguide by an input-grating, corresponding rays of light output from different locations of the output-grating to be substantially collimated. Adaptive optics of a display engine compensate for aberrations that vary over a field-of-view associated with light corresponding to the image out-coupled by the output-grating. Further, a curved portion of the curved waveguide is designed to keep internally reflected light below a critical angle to prevent inadvertent out-coupling thereof. Further, curved surfaces of the curved waveguide can include polynomial surfaces to compensate for lateral color errors and distortion.
-
公开(公告)号：US10359627B2
公开(公告)日：2019-07-23
申请号：US14936937
申请日：2015-11-10
Applicant: Microsoft Technology Licensing, LLC
Inventor： R. Andrew Wall , Scott Woltman , Steven John Robbins , Xinye Lou , Gangok Lee , Yarn Chee Poon , Tuomas Vallius , Pasi Kostamo , Tapani Levola , Yijing Fu
Abstract: An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide. The apparatus further includes an adjacent planar optical component to provide a more uniform intensity distribution compared to if the adjacent planar optical component were absent.
-
公开(公告)号：US20180292654A1
公开(公告)日：2018-10-11
申请号：US15800993
申请日：2017-11-01
Applicant: Microsoft Technology Licensing, LLC
Inventor： Richard Andrew Wall , Joshua Owen Miller , Tuomas Vallius , Andrew Maimone , Joel Steven Kollin
Abstract: A light engine comprises a liquid crystal on silicon (LCOS) panel that is operated in combination with illumination and imaging optics to project high-resolution virtual images into a waveguide-based exit pupil expander (EPE) that provides an expanded exit pupil in a near-eye display system. In an illustrative example, the illumination optics comprise a laser that produces illumination light that is reflected by a MEMS (micro-electromechanical system) scanner using raster scanning to post-scan optics including a microlens array (MLA) and one or more collimating or magnifying lenses before impinging on the LCOS panel. The LCOS panel operates in reflection in combination with imaging optics, including one or more of beam-steering mirror and beam splitter, to couple virtual image light from the LCOS panel into the EPE.
-
公开(公告)号：US10073278B2
公开(公告)日：2018-09-11
申请号：US14837626
申请日：2015-08-27
Applicant: Microsoft Technology Licensing, LLC
Inventor： Tuomas Vallius
CPC classification number: G02B27/4205 , G02B27/0081 , G02B27/0172 , G02B27/286 , G02B27/4272 , G02B2027/0123
Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), an in-coupling DOE couples light into the waveguide, an intermediate DOE provides exit pupil expansion in a first direction, and an out-coupling DOE provides exit pupil expansion in a second direction and couples light out of the waveguide. The in-coupling DOE is configured with two portions—a first portion includes a grating to rotate a polarization state of in-coupled light while a second portion couples light into the waveguide without modulation of the polarization state. The in-coupled light beams with different polarization states are combined in the waveguide after undergoing total internal reflection. However, as the difference in optical path lengths of the constituent light beams exceeds the coherence length, the combined light has random polarization (i.e., a degree of polarization equal to zero).
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.022 seconds)
