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公开(公告)号：US11231579B1
公开(公告)日：2022-01-25
申请号：US16252442
申请日：2019-01-18
Applicant: Facebook Technologies, LLC
Inventor： Giuseppe Calafiore , Ningfeng Huang , Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Gerard Franck Olivier , David Massoubre
Abstract: A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.
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公开(公告)号：US20190305188A1
公开(公告)日：2019-10-03
申请号：US16369059
申请日：2019-03-29
Applicant: Facebook Technologies, LLC
Inventor： Thomas Lauermann , Stephan Lutgen , David Hwang
Abstract: Disclosed herein are systems and methods for reducing surface recombination losses in micro-LEDs. In some embodiments, an LED includes a semiconductor layer including an active light emitting layer. A light outcoupling surface of the semiconductor layer has a diameter that is less than two times an electron diffusion length of a material of the semiconductor layer. The LED also includes a passivation layer that is formed on an outer surface of the semiconductor layer opposite to the light outcoupling surface. The passivation layer includes a dielectric material, and the passivation layer is in direct contact with a portion of the active light emitting layer.
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公开(公告)号：US20190305183A1
公开(公告)日：2019-10-03
申请号：US15969523
申请日：2018-05-02
Applicant: Facebook Technologies, LLC
Inventor： Stephan Lutgen
Abstract: Disclosed herein are light emitting diodes (LEDs) having a high efficiency. A light emitting diode including an active light emitting layer within a semiconductor layer is provided. The semiconductor layer has a mesa shape. The light emitting diode also includes a substrate having a first surface on which the semiconductor layer is positioned and an outcoupling surface opposite to the first surface. Light generated by the active light emitting layer is incident on the outcoupling surface and propagates toward an optical element downstream of the outcoupling surface. The light emitting diode also includes a first anti-reflection coating adjacent to the outcoupling surface; an index-matched material between the outcoupling surface and the optical element, wherein an index of refraction of the index-matched material is greater than or equal to an index of refraction of the optical element; and/or secondary optics adjacent to the outcoupling surface.
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公开(公告)号：US20190305181A1
公开(公告)日：2019-10-03
申请号：US16369069
申请日：2019-03-29
Applicant: Facebook Technologies, LLC
Inventor： Thomas Lauermann , Stephan Lutgen , David Hwang
Abstract: Disclosed herein are systems and methods for reducing surface recombination losses in micro-LEDs. In some embodiments, a method includes reducing a lateral carrier diffusion in an outer region of a semiconductor layer by implanting ions in the outer region of the semiconductor layer. The semiconductor layer includes an active light emitting layer. An outcoupling surface of the semiconductor layer has a diameter of less than 10 μm. The outer region of the semiconductor layer extends from an outer surface of the semiconductor layer to a central region of the semiconductor layer that is shaded by a mask during the implanting of the ions.
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公开(公告)号：US20220238755A1
公开(公告)日：2022-07-28
申请号：US17681192
申请日：2022-02-25
Applicant: Facebook Technologies, LLC
Inventor： Stephan Lutgen , David Massoubre
Abstract: A emitting diode (LED) includes an epitaxial structure defining a base and a mesa on the base. The base defines a light emitting surface of the LED and includes current spreading layer. The mesa includes a thick confinement layer, a light generation area on the thick confinement layer to emit light, a thin confinement layer on the light generation area, and a contact layer on the thin confinement layer, the contact layer defining a top of the mesa. A reflective contact is on the contact layer to reflect a portion of the light emitted from the light generation area, the reflected light being collimated at the mesa and directed through the base to the light emitting surface. In some embodiments, the epitaxial structure grown on a non-transparent substrate. The substrate is removed, or used to form an extended reflector to collimate light.
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Patent Agency Ranking
公开(公告)号：US10942378B2
公开(公告)日：2021-03-09
申请号：US16890607
申请日：2020-06-02
Applicant: Facebook Technologies, LLC
Inventor： Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Ningfeng Huang , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Giuseppe Calafiore , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Olivier , David Massoubre
Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
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公开(公告)号：US10468552B2
公开(公告)日：2019-11-05
申请号：US15969523
申请日：2018-05-02
Applicant: Facebook Technologies, LLC
Inventor： Stephan Lutgen
Abstract: Disclosed herein are light emitting diodes (LEDs) having a high efficiency. A light emitting diode including an active light emitting layer within a semiconductor layer is provided. The semiconductor layer has a mesa shape. The light emitting diode also includes a substrate having a first surface on which the semiconductor layer is positioned and an outcoupling surface opposite to the first surface. Light generated by the active light emitting layer is incident on the outcoupling surface and propagates toward an optical element downstream of the outcoupling surface. The light emitting diode also includes a first anti-reflection coating adjacent to the outcoupling surface; an index-matched material between the outcoupling surface and the optical element, wherein an index of refraction of the index-matched material is greater than or equal to an index of refraction of the optical element; and/or secondary optics adjacent to the outcoupling surface.
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公开(公告)号：US11018280B2
公开(公告)日：2021-05-25
申请号：US16800875
申请日：2020-02-25
Applicant: Facebook Technologies, LLC
Inventor： Thomas Lauermann , Stephan Lutgen , David Hwang
Abstract: Disclosed herein are systems and methods for reducing surface recombination losses in micro-LEDs. In some embodiments, a method includes increasing a bandgap in an outer region of a semiconductor layer by implanting ions in the outer region of the semiconductor layer and subsequently annealing the outer region of the semiconductor layer to intermix the ions with atoms within the outer region of the semiconductor layer. The semiconductor layer includes an active light emitting layer. A light outcoupling surface of the semiconductor layer has a diameter of less than 10 μm. The outer region of the semiconductor layer extends from an outer surface of the semiconductor layer to a central region of the semiconductor layer that is shaded by a mask during the implanting of the ions.
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公开(公告)号：US20200292851A1
公开(公告)日：2020-09-17
申请号：US16890607
申请日：2020-06-02
Applicant: Facebook Technologies, LLC
Inventor： Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Ningfeng Huang , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Giuseppe Calafiore , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Olivier , David Massoubre
Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
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公开(公告)号：US10705353B1
公开(公告)日：2020-07-07
申请号：US16224637
申请日：2018-12-18
Applicant: Facebook Technologies, LLC
Inventor： Andrew Maimone , Andrew Ouderkirk , Hee Yoon Lee , Ningfeng Huang , Maxwell Parsons , Scott Charles McEldowney , Babak Amirsolaimani , Pasi Saarikko , Wanli Chi , Giuseppe Calafiore , Alexander Koshelev , Barry David Silverstein , Lu Lu , Wai Sze Tiffany Lam , Gang Li , Stephan Lutgen , Francois Olivier , David Massoubre
Abstract: A pupil-replicating waveguide suitable for operation with a coherent light source is disclosed. A waveguide body has opposed surfaces for guiding a beam of image light. An out-coupling element is disposed in an optical path of the beam for out-coupling portions of the beam at a plurality of spaced apart locations along the optical path. Electrodes are coupled to at least a portion of the waveguide body for modulating an optical path length of the optical path of the beam to create time-varying phase delays between the portions of the beam out-coupled by the out-coupling element.
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