Patents by Inventor Emil P. Stefanov

Emil P. Stefanov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10295137
    Abstract: A motor vehicle headlight includes a light module, having a light source, a primary optics that collects light and micro projectors, of which each one comprises one respective input lens, one respective output lens and an aperture that is arranged between the input lens and the output lens. The input lens, the aperture and the output lens feature one width and one height. The primary optics, the input lens, the aperture and the output lens of one respective micro projector are arranged in such a way, that the light from the light source that emits from the primary optics illuminates the input lens, and the light of the light source that emits from the input lens illuminates the output lens. The headlight includes micro projectors, whose widths (b) are different and whose heights (h) are different.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: May 21, 2019
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Emil P. Stefanov, Christian Buchberger
  • Publication number: 20180335191
    Abstract: A motor vehicle headlight includes a light module, having a light source, a primary optics that collects light and micro projectors, of which each one comprises one respective input lens, one respective output lens and an aperture that is arranged between the input lens and the output lens. The input lens, the aperture and the output lens feature one width and one height. The primary optics, the input lens, the aperture and the output lens of one respective micro projector are arranged in such a way, that the light from the light source that emits from the primary optics illuminates the input lens, and the light of the light source that emits from the input lens illuminates the output lens. The headlight includes micro projectors, whose widths (b) are different and whose heights (h) are different.
    Type: Application
    Filed: May 2, 2018
    Publication date: November 22, 2018
    Inventors: Emil P. Stefanov, Christian Buchberger
  • Patent number: 10113704
    Abstract: A headlight of a motor vehicle including a light source and first projection optics, in which each one includes a respective first pair made of one respective first image mask and of one respective first projection lens with a first focal length, which is illuminated by the light source through the one respective image mask. The headlight has two projection optics, in which each one is featuring a respective second pair made of one respective second image mask and of one respective second projection lens with a second focal length, which is illuminated by the light source through the one respective second image mask. The second focal length is greater than the first focal length. An illuminated portion of the first image mask, has a shape of at least a first portion of an overall light distribution of the headlight, and a portion of the second image masks, has a shape of a central portion of the overall light distribution of the headlight.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: October 30, 2018
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Joachim Knittel, Martin Licht, Christian Buchberger, Emil P. Stefanov
  • Patent number: 9982862
    Abstract: Light guiding elements having a light guiding section extending between a light entrance surface for coupling in light and a light exit surface for coupling out light from the light guiding element through the light exit surface. The light exit surface extends along an exit surface longitudinal direction. The light guiding section has at least a first and a second lateral surface extending from the light entrance surface to the light exit surface such that light can be guided by total internal reflection from the light entrance surface to the light exit surface. The form of the light entrance surface differs from that of the light exit surface. The light guiding section has a roof section extending toward the light exit surface in which the first and the second lateral surfaces taper toward each other with respect to the exit surface longitudinal direction.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: May 29, 2018
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Emil P. Stefanov, Christian Buchberger
  • Publication number: 20180010756
    Abstract: A headlight of a motor vehicle including a light source and first projection optics, in which each one includes a respective first pair made of one respective first image mask and of one respective first projection lens with a first focal length, which is illuminated by the light source through the one respective image mask. The headlight has two projection optics, in which each one is featuring a respective second pair made of one respective second image mask and of one respective second projection lens with a second focal length, which is illuminated by the light source through the one respective second image mask. The second focal length is greater than the first focal length. An illuminated portion of the first image mask, has a shape of at least a first portion of an overall light distribution of the headlight, and a portion of the second image masks, has a shape of a central portion of the overall light distribution of the headlight.
    Type: Application
    Filed: July 7, 2017
    Publication date: January 11, 2018
    Applicant: Automotive Lighting Reutlingen GmbH
    Inventors: Joachim Knittel, Martin Licht, Christian Buchberger, Emil P. Stefanov
  • Patent number: 9599304
    Abstract: A light module of a lighting equipment of a motor vehicle that includes several separately controllable light sources combined in an array, several primary optics elements in the form of collective lenses, each of which has a light ingress surface and a light emitting surface, that are combined to a primary optics array, wherein the primary optics elements concentrate at least a portion of the light emitted by the light sources and generate intermediate light distributions on the light emitting surfaces, and a secondary optics system for reproducing the emitted light on a road in front of a motor vehicle as resulting total light distribution of the light module. The secondary optics system for reproducing the intermediate light distributions as resulting total light distribution of the light module is focused on at least one of the light-emitting surfaces of the collective lenses.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: March 21, 2017
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Matthias Brendle, Emil P. Stefanov, Armin Austerschulte, Hubert Zwick, Hermann Kellermann
  • Patent number: 9476558
    Abstract: The invention relates to a projection lens for use in an LED module of a motor vehicle headlamp. The LED module has a light source in the form of an LED matrix including numerous LED chips disposed in a matrix adjacent to and/or above one another, a primary lens including numerous primary lens elements disposed in a matrix adjacent to and/or above one another for bundling light emitted from the light source, and a projection lens. The projection lens projects a light exit surface of the primary lens to generate a predefined light distribution on a surface in front of the vehicle. The projection lens is designed such that it generates at least two separate images of the light exit surface of the primary lens on its image side, which are offset to one another in the horizontal direction.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: October 25, 2016
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Emil P. Stefanov, Christian Buchberger, Markus Kiesel, Martin Licht
  • Patent number: 9323765
    Abstract: Example embodiments of the present invention provide authenticated file system that provides integrity and freshness of both data and metadata more efficiently than existing systems. The architecture of example embodiments of the present invention is natural to cloud settings involving a cloud service provider and enterprise-class tenants, thereby addressing key practical considerations, including garbage collection, multiple storage tiers, multi-layer caching, and checkpointing. Example embodiments of the present invention support a combination of strong integrity protection and practicality for large (e.g., petabyte-scale), high-throughput file systems. Further, example embodiments of the present invention support proofs of retrievability (PoRs) that let the cloud prove to the tenant efficiently at any time and for arbitrary workloads that the full file system (i.e.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: April 26, 2016
    Assignee: EMC Corporation
    Inventors: Emil P. Stefanov, Marten E. Van Dijk, Alina M. Oprea, Ari Juels
  • Patent number: 9230114
    Abstract: A client device or other processing device comprises a file processing module, with the file processing module being operative to provide a file to a file system for encoding, to receive from the file system a proof of correct encoding of the file, and to verify the proof of correct encoding. The file system may comprise one or more servers associated with a cloud storage provider. Advantageously, one or more illustrative embodiments allow a client device to verify that its files are stored by a cloud storage provider in encrypted form or with other appropriate protections.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: January 5, 2016
    Assignee: EMC Corporation
    Inventors: Ari Juels, Alina M. Oprea, Marten Erik van Dijk, Emil P. Stefanov
  • Publication number: 20150167913
    Abstract: The invention relates to light guiding elements (10), having a light guiding section (12) extending between a light entrance surface (14) for coupling in light and a light exit surface (16) for coupling out light from the light guiding element through the light exit surface, wherein the light exit surface is embodied in a manner extending along an exit surface longitudinal direction (22), and wherein the light guiding section has at least a first and a second lateral surface (34, 36) extending in the direction from the light entrance surface to the light exit surface in such a way that light can be guided by total internal reflection from the light entrance surface to the light exit surface.
    Type: Application
    Filed: July 24, 2013
    Publication date: June 18, 2015
    Inventors: Emil P. Stefanov, Christian Buchberger
  • Patent number: 9046237
    Abstract: A light module for a motor vehicle headlamp having an optical fiber configuration with at least one first optical fiber branch and one second optical fiber branch. Each of the two branches has a light exit surface each bordered by two narrow sides and disposed such that a narrow side of the first branch is disposed parallel and directly adjacent to a narrow side of the light exit surface of the second branch. Each branch exhibits two transport surfaces. The transport surfaces exhibit surface norms having a directional component, which faces more toward a first narrow side of the two narrow sides of the branch than toward a second narrow side of the two narrow sides of the branch, wherein the narrow sides lying directly adjacent and parallel to one another are a second narrow side of the first branch and a first narrow side of the second branch.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: June 2, 2015
    Assignee: AUTOMOTIVE LIGHTING REUTLINGEN GMBH
    Inventors: Emil P. Stefanov, Christian Buchberger, Henning Vogt
  • Publication number: 20150070926
    Abstract: The invention relates to a projection lens for use in an LED module of a motor vehicle headlamp. The LED module has a light source in the form of an LED matrix including numerous LED chips disposed in a matrix adjacent to and/or above one another, a primary lens including numerous primary lens elements disposed in a matrix adjacent to and/or above one another for bundling light emitted from the light source, and a projection lens. The projection lens projects a light exit surface of the primary lens to generate a predefined light distribution on a surface in front of the vehicle. The projection lens is designed such that it generates at least two separate images of the light exit surface of the primary lens on its image side, which are offset to one another in the horizontal direction.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 12, 2015
    Inventors: Emil P. Stefanov, Christian Buchberger, Markus Kiesel, Martin Licht
  • Publication number: 20140307459
    Abstract: The present invention relates to a light module of a lighting equipment of a motor vehicle that includes several separately controllable light sources combined in an array, several primary optics elements in the form of collective lenses, each of which has a light ingress surface and a light emitting surface, that are combined to a primary optics array, wherein the primary optics elements concentrate at least a portion of the light emitted by the light sources and generate intermediate light distributions on the light emitting surfaces, and a secondary optics system for reproducing the emitted light on a road in front of a motor vehicle as resulting total light distribution of the light module. The secondary optics system for reproducing the intermediate light distributions as resulting total light distribution of the light module is focused on at least one of the light-emitting surfaces of the collective lenses.
    Type: Application
    Filed: March 31, 2014
    Publication date: October 16, 2014
    Inventors: Matthias Brendle, Emil P. Stefanov, Armin Austerschulte, Hubert Zwick, Hermann Kellermann
  • Patent number: 8801242
    Abstract: A light module of a motor vehicle generates a spot distribution of a high-beam-light distribution formed by superimposition of the spot distribution and a base distribution generated by at least one other module. The light module comprises a plurality of separately controllable sub-modules that generate a plurality of stripe-shaped segments of the spot distribution that supplement it. Also, a headlight generates the high-beam-light distribution and comprises the light module. Furthermore, a headlight system comprises a pair of the headlights disposed in a front region toward sides of the vehicle and each of which generates the high-beam-light distribution. The headlights include corresponding light modules that generate stripe-shaped segments of left and right sides, respectively, of the spot distribution such that the stripe-shaped segments of the light modules of the headlights supplement the spot distribution or are at least partially superimposed thereon.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: August 12, 2014
    Assignee: Automotive Lighting Reutlingen GmbH
    Inventors: Michael Hamm, Ernst-Olaf Rosenhahn, Emil P. Stefanov
  • Patent number: 8799334
    Abstract: A client device or other processing device comprises a file processing module, with the file processing module being operative to provide a file to a file system for encoding, to receive from the file system a corresponding encoded file, and to verify that the file system stores at least a designated portion of an encapsulation of the encoded file. In an illustrative embodiment, the file processing module receives, in addition to or in place of the encoded file, a proof of correct encoding. The file system may comprise one or more servers associated with a cloud storage provider. Advantageously, one or more illustrative embodiments allow a client device to verify that its files are stored by a cloud storage provider in encrypted form or with other appropriate protections.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: August 5, 2014
    Assignee: EMC Corporation
    Inventors: Emil P. Stefanov, Marten Erik van Dijk, Alina M. Oprea, Ari Juels
  • Publication number: 20140198513
    Abstract: A light module for a motor vehicle headlamp having an optical fiber configuration with at least one first optical fiber branch and one second optical fiber branch. Each of the two branches has a light exit surface each bordered by two narrow sides and disposed such that a narrow side of the first branch is disposed parallel and directly adjacent to a narrow side of the light exit surface of the second branch. Each branch exhibits two transport surfaces. The transport surfaces exhibit surface norms having a directional component, which faces more toward a first narrow side of the two narrow sides of the branch than toward a second narrow side of the two narrow sides of the branch, wherein the narrow sides lying directly adjacent and parallel to one another are a second narrow side of the first branch and a first narrow side of the second branch.
    Type: Application
    Filed: January 8, 2014
    Publication date: July 17, 2014
    Inventors: Emil P. Stefanov, Christian Buchberger, Henning Vogt
  • Patent number: 8706701
    Abstract: Example embodiments of the present invention provide authenticated file system that provides integrity and freshness of both data and metadata more efficiently than existing systems. The architecture of example embodiments of the present invention is natural to cloud settings involving a cloud service provider and enterprise-class tenants, thereby addressing key practical considerations, including garbage collection, multiple storage tiers, multi-layer caching, and checkpointing. Example embodiments of the present invention support a combination of strong integrity protection and practicality for large (e.g., petabyte-scale), high-throughput file systems. Further, example embodiments of the present invention support proofs of retrievability (PoRs) that let the cloud prove to the tenant efficiently at any time and for arbitrary workloads that the full file system (i.e.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: April 22, 2014
    Assignee: EMC Corporation
    Inventors: Emil P. Stefanov, Marten E. Van Dijk, Alina M. Oprea, Ari Juels
  • Patent number: 8346742
    Abstract: A client device or other processing device comprises a file processing module, with the file processing module being operative to request proof from a file system that a file having a first format is stored by the file system in a second format different than the first format, to receive the proof from the file system, and to verify that the file is stored in the second format using the proof provided by the file system responsive to the request. The proof is based at least in part on application of a function to the file in the second format, and the function imposes a minimum resource requirement on generation of the proof. The file system may comprise one or more servers associated with a cloud storage provider. Advantageously, one or more illustrative embodiments allow a client device to verify that its files are stored by a cloud storage provider in encrypted form or with other appropriate protections.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: January 1, 2013
    Inventors: Ari Juels, Marten Erik van Dijk, Alina Oprea, Ronald L. Rivest, Emil P. Stefanov
  • Publication number: 20120275173
    Abstract: A light module of a motor vehicle generates a spot distribution of a high-beam-light distribution formed by superimposition of the spot distribution and a base distribution generated by at least one other module. The light module comprises a plurality of separately controllable sub-modules that generate a plurality of stripe-shaped segments of the spot distribution that supplement it. Also, a headlight generates the high-beam-light distribution and comprises the light module. Furthermore, a headlight system comprises a pair of the headlights disposed in a front region toward sides of the vehicle and each of which generates the high-beam-light distribution. The headlights include corresponding light modules that generate stripe-shaped segments of left and right sides, respectively, of the spot distribution such that the stripe-shaped segments of the light modules of the headlights supplement the spot distribution or are at least partially superimposed thereon.
    Type: Application
    Filed: April 12, 2012
    Publication date: November 1, 2012
    Inventors: Michael Hamm, Ernst-Olaf Rosenhahn, Emil P. Stefanov
  • Patent number: 7456035
    Abstract: In a method for fabricating a flip-chip light emitting diode device, epitaxial layers (14, 114) are deposited on a growth substrate (16, 116) to produce an epitaxial wafer. A plurality of light emitting diode devices are fabricated on the epitaxial wafer. The epitaxial wafer is diced to generate a device die (10, 110). The device die (10, 110) is flip chip bonded to a mount (12, 112). The flip chip bonding includes securing the device die (10, 110) to the mount (12, 112) by bonding at least one electrode (20, 22, 120) of the device die (10, 110) to at least one bonding pad (26, 28, 126) of the mount (12, 112). Subsequent to the flip chip bonding, a thickness of the growth substrate (16, 116) of the device die (10, 110) is reduced.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: November 25, 2008
    Assignee: Lumination LLC
    Inventors: Ivan Eliashevich, Boris Kolodin, Emil P. Stefanov