Patents by Inventor Toni Lopez

Toni Lopez 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).

  • Publication number: 20210059027
    Abstract: A control system for an LED array relies on defining a first and a second group of separately addressed LED pixels, with the first group including pixels with an average current no less than the current at a Q point and a second group including pixels with an average current less than the current at a Q point. An amplitude signal provided to the first group of separately addressed LED pixels is selectively modulated, while providing a DC mode 100% duty cycle. An amplitude signal provided to the second group of separately addressed LED pixels is fixed, and a modulated duty cycle is provided.
    Type: Application
    Filed: August 19, 2020
    Publication date: February 25, 2021
    Inventors: Toni Lopez, Ronald Johannes Bonne, Zhi Hua Song
  • Publication number: 20200411724
    Abstract: An LED structure includes an epi layer grown on a substrate and a plurality of dielectric nanoantennas positioned within the epi layer. The dielectric antennas can be periodically arranged to reduce reabsorption of light and redirect oblique incident light to improve overall light coupling efficiency. Each of the dielectric nanoantennas can have a top, a bottom, a height less than 1000 nm and greater than 200 nm and a diameter less than 2000 nm and greater than 300 nm.
    Type: Application
    Filed: June 27, 2019
    Publication date: December 31, 2020
    Applicant: Lumileds LLC
    Inventors: Aimi ABASS, Toni LOPEZ, Isaac WILDESON
  • Publication number: 20200409165
    Abstract: A light emitting device comprises a plurality of coherent light sources, and a plurality of light scattering structures. Each light scattering structure is located in an optical path for light output from a different corresponding one of the coherent light sources. Each light scattering structure comprises an arrangement of nanoantennas embedded in an electrically responsive material and electrical contacts by which to apply a voltage to the electrically responsive material. Application of a time varying electrical signal causes the refractive index of the electrically responsive material in a light scattering structure to vary and thereby varies light scattering by the nanoantennas in the light scattering structure. This effect may be used to reduce speckle caused by interference of light output by the coherent light sources.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 31, 2020
    Applicant: Lumileds LLC
    Inventors: Venkata Ananth TAMMA, Toni LOPEZ, Varun Dev KAKKAR
  • Publication number: 20200335661
    Abstract: This specification discloses LEDs in which the light emitting active region of the semiconductor diode structure is located within an optical cavity defined by a nanostructured layer embedded within the semiconductor diode structure on one side of the active region and a reflector located on the opposite side of the active region from the embedded nanostructured layer. The reflector may, for example, be a conventional specular reflector disposed on or adjacent to a surface of the semiconductor diode structure. Alternatively, the reflector may or comprise a nanostructured layer. The reflector may comprise a nanostructured layer and a specular reflector, with the nanostructured layer disposed adjacent to the specular reflector between the specular reflector and the active region.
    Type: Application
    Filed: April 21, 2020
    Publication date: October 22, 2020
    Applicant: LUMILEDS LLC
    Inventors: Venkata Ananth TAMMA, Toni LOPEZ
  • Publication number: 20200203571
    Abstract: The escape surface of a light emitting element includes features that include sloped surfaces that have angles of inclination that are based on the direction of peak light output from the light emitting element. If the light output exhibits a number of lobes at different directions, the sloped surfaces may have a corresponding number of different angles of inclination. To minimize the re-injection of light into adjacent features, adjacent features may be positioned to avoid having surfaces that directly face each other. The features may be shaped or positioned to provide a pseudo-random distribution of inclined surfaces across the escape surface, and multiple roughening processes may be used.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Inventor: Toni Lopez
  • Patent number: 10608140
    Abstract: The escape surface of a light emitting element includes features that include sloped surfaces that have angles of inclination that are based on the direction of peak light output from the light emitting element. If the light output exhibits a number of lobes at different directions, the sloped surfaces may have a corresponding number of different angles of inclination. To minimize the re-injection of light into adjacent features, adjacent features may be positioned to avoid having surfaces that directly face each other. The features may be shaped or positioned to provide a pseudo-random distribution of inclined surfaces across the escape surface, and multiple roughening processes may be used.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: March 31, 2020
    Assignee: Lumileds LLC
    Inventor: Toni Lopez
  • Patent number: 10461230
    Abstract: The present invention relates to a light emitting diode component, comprising a light emitting semiconductor structure having a top surface, and a micro-optical multilayer structure arranged to guide light out from said light emitting semiconductor structure, said micro-optical multilayer structure comprising a plurality of layers, wherein an i+1:th layer is arranged on top an i:th layer in a sequence as seen from said semiconductor structure, wherein a refractive index, ni, of the i:th layer is greater than a refractive index, ni+l, of the i+1:th layer, and wherein a thickness of the i+1:th layer is greater than a thickness of the i:th layer. The present invention also relates to a light emitting diode comprising such a light emitting diode component.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: October 29, 2019
    Assignee: Koninklijke Philips N.V.
    Inventor: Toni Lopez
  • Patent number: 10355168
    Abstract: A lighting device according to embodiments of the invention includes a substrate with a plurality of holes that extend from a surface of the substrate. A non-III-nitride material is disposed within the plurality of holes. The surface of the substrate is free of the non-III-nitride material. A semiconductor structure is grown on the surface of the substrate. The semiconductor structure includes a light emitting layer disposed between an n-type region and a p-type region.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: July 16, 2019
    Assignee: LUMILEDS LLC
    Inventor: Toni Lopez
  • Publication number: 20190131498
    Abstract: The invention describes a broadband mirror comprising an outer surface layer; and a dielectric layer stack arranged underneath the outer surface layer; characterized in that the dielectric layer stack comprises at least one patterned surface at an interface between adjacent dielectric layers of the dielectric layer stack. The invention further describes a light-emitting diode. The invention also describes a method of manufacturing a broadband mirror, which method comprises the steps of providing an outer surface layer and applying a plurality of dielectric layers to build a dielectric layer stack underneath the outer surface layer, characterized by the step of patterning the surface of at least one dielectric layer before applying a subsequent dielectric layer to the patterned surface.
    Type: Application
    Filed: April 5, 2017
    Publication date: May 2, 2019
    Applicant: Lumileds LLC
    Inventors: Toni LOPEZ, Fahong JIN
  • Publication number: 20190115496
    Abstract: A system, method and device for use as a reflector for a light emitting diode (LED) are disclosed. The system, method and device include a first layer designed to reflect transverse-electric (TE) radiation emitted by the LED, a second layer designed to block transverse-magnetic (TM) radiation emitted from the LED, and a plurality of ITO layers designed to operate as a transparent conducting oxide layer. The first layer may be a one-dimension (1D) distributed Bragg reflective (DBR) layer. The second layer may be a two-dimension (2D) photonic crystal (PhC), a three-dimension (3D) PhC, and/or a hyperbolic metamaterial (HMM). The 2D PhC may include horizontal cylinder bars, vertical cylinder bars, or both. The system, method and device may include a bottom metal reflector that may be Ag free and may act as a bonding layer.
    Type: Application
    Filed: October 15, 2018
    Publication date: April 18, 2019
    Applicant: Lumileds LLC
    Inventors: Toni LOPEZ, Venkata Ananth TAMMA
  • Publication number: 20190115492
    Abstract: A device, system and method for producing enhanced external quantum efficiency (EQE) LED emission are disclosed. The device, system and method include a patterned layer configured to transform surface modes into directional radiation, a semiconductor layer formed as a III/V direct bandgap semiconductor to produce radiation, and a metal back reflector layer configured to reflect incident radiation. The patterned layer may be one-dimensional, two-dimensional or three-dimensional. The patterned layer may be submerged within the semiconductor layer or within the dielectric layer. The semiconductor layer is p-type gallium nitride (GaN). The patterned layer may be a hyperbolic metamaterials (HMM) layer and may include Photonic Hypercrystal (PhHc), or may be a low or high refractive index material or may be a metal.
    Type: Application
    Filed: October 15, 2018
    Publication date: April 18, 2019
    Applicant: Lumileds LLC
    Inventors: Venkata Ananth TAMMA, Toni LOPEZ
  • Patent number: 10218267
    Abstract: Power conversion device for supplying a load with a PWM signal, comprising an inductive filter having at least an output configured to be connected to the load, the device comprising: a power conversion module supplied by an input voltage and configured for providing a plurality of output signals wherein one of the plurality of output signals is supplied to the filter; a conversion ratio control stage coupled to the power conversion module; and a controller configured to: determine a requested conversion ratio based on the input voltage and a target reference voltage; and based on the requested conversion ratio, control the conversion ratio control stage to operate in either a first operating mode, whereby the power conversion module provides the output signals in accordance with a first conversion ratio, or a second operating mode, whereby the power conversion module provides the output signals in accordance with a second conversion ratio.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: February 26, 2019
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Julia Delos Ayllon, Toni Lopez, Machiel Antonius Martinus Hendrix, Eduardo-Jose Alarcon-Cot
  • Patent number: 10143046
    Abstract: The current invention relates to a driver for driving one or a plurality of LEDs (D1, D2), comprising at least one driving unit (201, 202) adapted to be supplied with a differential voltage, between one first bias voltage (VB1) and one second bias voltage (VB2), the differential voltage being adapted to be equal or larger than the largest expected variations (?VF) of the forward voltage of said one or a plurality of LEDs (D1, D2). Another aspect of the invention relates to an integrated package comprising at least an LED and associated driving unit (201, 202). Another aspect of the invention relates to a light module comprising a plurality of LEDs (D1, D2) and associated driving units (201, 202).
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: November 27, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Julia Delos Ayllon, Toni Lopez, Machiel Antonius Martinus Hendrix, Eduardo-Jose Alarcon-Cot
  • Publication number: 20180315901
    Abstract: Embodiments of the invention include a flip chip semiconductor light emitting device and a wavelength converting structure disposed in a path of light extracted from the flip chip semiconductor light emitting device. A substrate with a textured top surface is positioned with the bottom surface facing the wavelength converting structure. The wavelength converting structure is disposed between the substrate and the flip chip semiconductor light emitting device.
    Type: Application
    Filed: October 10, 2016
    Publication date: November 1, 2018
    Applicant: Lumileds Holding B.V.
    Inventor: Toni LOPEZ
  • Patent number: 10090436
    Abstract: Embodiments of the invention include a substrate (10) and a semiconductor structure (12) grown on the substrate. The semiconductor structure includes a light emitting layer (18) disposed between an n-type region (16) and a p-type region (20). The substrate includes a first sidewall (30) and a second sidewall (32). The first sidewall and second sidewall are disposed at different angles relative to a major surface of the semiconductor structure. A reflective layer (34) is disposed over the first sidewall (30).
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: October 2, 2018
    Assignee: Lumileds LLC
    Inventor: Toni Lopez
  • Patent number: 10090437
    Abstract: The present invention relates to a light emitting device (100) comprising: a substrate (102); a light emitting diode structure (106) arranged on the substrate (102), the diode structure (106) comprising a first semiconducting layer (108), an active region (110) and a second semiconducting layer (112), wherein a light output surface of the diode structure comprises a plurality of protruding surface structures (104) each having a peak height, a sidewall slope (122) and orientation in relation to the substrate, the plurality of protruding structures (104) comprising a first set and a second set of protruding surface structures, the first set and second set of protruding surface structures differing by at least one of the peak height, sidewall slope and orientation in relation to the substrate. The invention also relates to a method for manufacturing a light emitting device where the protruding surface structures are formed by imprint lithography to form a three-dimensional pattern and subsequent etching.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: October 2, 2018
    Assignee: Lumileds LLC
    Inventors: Cornelis Eustatius Timmering, Marcus Antonius Verschuuren, Toni Lopez, Abraham Rudolf Balkenende
  • Publication number: 20180254390
    Abstract: The present invention relates to a light emitting diode component, comprising a light emitting semiconductor structure having a top surface, and a micro-optical multilayer structure arranged to guide light out from said light emitting semiconductor structure, said micro-optical multilayer structure comprising a plurality of layers, wherein an i+1:th layer is arranged on top an i:th layer in a sequence as seen from said semiconductor structure, wherein a refractive index, ni, of the i:th layer is greater than a refractive index, ni+l, of the i+1:th layer, and wherein a thickness of the i+1:th layer is greater than a thickness of the i:th layer. The present invention also relates to a light emitting diode comprising such a light emitting diode component.
    Type: Application
    Filed: May 7, 2018
    Publication date: September 6, 2018
    Inventor: Toni Lopez
  • Patent number: 10026881
    Abstract: Embodiments of the invention include a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A metal busbar is disposed on the semiconductor structure. A first portion of the metal busbar is in direct contact with the semiconductor structure. A reflector is disposed between a second portion of the metal busbar and the semiconductor structure. A current blocking structure prevents current from being injected in the light emitting layer in a region below the first portion.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: July 17, 2018
    Assignee: Koninklijke Philips N.V.
    Inventor: Toni Lopez
  • Patent number: 9966511
    Abstract: The present invention relates to a light emitting diode component (101), comprising a light emitting semiconductor structure (104) having a top surface, and a micro-optical multilayer structure (102) arranged to guide light out from said light emitting semiconductor structure (104), said micro-optical multilayer structure (102) comprising a plurality of layers, wherein an i+1:th layer is arranged on top an i:th layer in a sequence as seen from said semiconductor structure (104), wherein a refractive index, ni, of the i:th layer is greater than a refractive index, ni+1, of the i+1:th layer, and wherein a thickness of the i+1:th layer is greater than a thickness of the i:th layer. The present invention also relates to a light emitting diode comprising such a light emitting diode component.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: May 8, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Toni Lopez
  • Publication number: 20180108823
    Abstract: A substantial amount of the light emitting surface area of a wavelength conversion element above a light emitting element is covered by a reflective thermal conductive element. The light that is reflected by this reflective element is ‘recycled’ within the light emitting structure and exits the structure through the smaller area that is not covered by the reflective element. Because the thermal conductive element does not need to be transparent, a relatively thick metal layer may be used; and, because the thermal conductive element covers a substantial area of the wavelength conversion element, the thermal efficiency of this arrangement is very high. The reflective thermal conductive element may be coupled to thermal conductive pillars, which may be mounted on a thermal conductive submount.
    Type: Application
    Filed: March 23, 2016
    Publication date: April 19, 2018
    Inventor: Toni Lopez