Patents Assigned to Lumileds LLC
  • Patent number: 11959800
    Abstract: An automotive headlight is disclosed including: an optical unit including a plurality of optical elements, each optical element having a different central direction; a segmented light-emitting diode (LED) chip including a plurality of LEDs that are separated by trenches formed on the segmented LED chip and arranged in a plurality of sections, each section being aligned with a different respective optical element, and each section including at least one first LED and at least one second LED; and a controller configured to: apply a forward bias to each of the first LEDs, apply a reverse bias to each of the second LEDs, and change a brightness of the first LEDs in any section based on a signal generated by the second LED in that section.
    Type: Grant
    Filed: July 26, 2022
    Date of Patent: April 16, 2024
    Assignee: Lumileds LLC
    Inventors: Erik Charles Nelson, Isaac Wildeson, Parijat Deb, Kenneth Vampola
  • Patent number: 11961875
    Abstract: A device may include a metal contact between a first isolation region and a second isolation region on a first surface of an epitaxial layer. The device may include a first sidewall and a second sidewall on a second surface of the epitaxial layer distal to the first isolation region and the second isolation region. The device may include a wavelength converting layer on the epitaxial layer between the first sidewall and the second sidewall.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: April 16, 2024
    Assignee: Lumileds LLC
    Inventors: Ashish Tandon, Rajat Sharma, Joseph Flemish, Andrei Papou, Wen Yu, Erik William Young, Yu-Chen Shen, Luke Gordon
  • Patent number: 11961941
    Abstract: An LED array comprises a first mesa comprising a top surface, at least a first LED including a first p-type layer, a first n-type layer and a first color active region and a tunnel junction on the first LED, a second n-type layer on the tunnel junction, the second n-type layer comprising at least one n-type III-nitride layer with >10% Al mole fraction and at least one n-type III-nitride layer with <10% Al mole fraction. The LED array further comprises an adjacent mesa comprising a top surface, the first LED, a second LED including the second n-type layer, a second p-type layer and a second color active region. A first trench separates the first mesa and the adjacent mesa, cathode metallization in the first trench and in electrical contact with the first and the second color active regions of the adjacent mesa, and anode metallization contacts on the n-type layer of the first mesa and on the anode layer of the adjacent mesa.
    Type: Grant
    Filed: March 3, 2023
    Date of Patent: April 16, 2024
    Assignee: Lumileds LLC
    Inventors: Robert Armitage, Isaac Wildeson
  • Patent number: 11953805
    Abstract: A method according to embodiments of the invention includes creating a three-dimensional profile of a scene, calculating a relative amount of light for each portion of the scene based on the three-dimensional profile, and activating a light source to provide a first amount of light to a first portion of the scene, and a second amount of light to a second portion of the scene. The first amount and the second amount are different. The first amount and the second amount are determined by calculating a relative amount of light for each portion of the scene.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: April 9, 2024
    Assignee: Lumileds LLC
    Inventors: Arjen Gerben Van der Sijde, Nicola Bettina Pfeffer, Pieter Johannes Quintus van Voorst Vader, Yourii Martynov
  • Patent number: 11955583
    Abstract: A micro-light emitting diode (uLED) device comprises: a mesa comprising: a plurality of semiconductor layers including an n-type layer, an active layer, and a p-type layer; a p-contact layer contacting the p-type layer; a cathode contacting the first sidewall of the n-type layer; a first region of dielectric material that insulates the p-contact layer, the active layer, and a first sidewall of the p-type layer from the cathode; an anode contacting the top surface of the p-contact layer; and a second region of dielectric material that insulates the active layer, a second sidewall of the p-type layer, and the second sidewall of the n-type layer from the anode. The top surface of the p-contact layer has a different planar orientation compared to the first and second sidewalls of the n-type layer. Methods of making and using the uLED devices are also provided.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: April 9, 2024
    Assignee: Lumileds LLC
    Inventors: Yeow Meng Teo, Wee-Hong Ng, Pei-Chee Mah, Chee Chung James Wong, Geok Joo Soh
  • Patent number: 11949053
    Abstract: A light emitting diode (LED) device comprises: an interposer comprising: an interposer body, a plurality of pillars on a first surface of the interposer body, and two or more local fiducials on the first surface of the interposer body; an LED die comprising a die body and a first die surface comprising a plurality of light emitting diodes (LEDs), the LED die being mounted on the plurality of pillars; and a flux material located between each of the pillars and a second die surface of the die body, the second die surface of the die body being opposite the first die surface, there being no flux material on a fiducial surface of each of the local fiducials. Methods of manufacturing a light emitting diode (LED) devices comprise: printing a flux material onto the pillars of the interposer, attaching an LED die to the pillars, and washing away excess flux material.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventors: Chee-Jong Loh, Khar Kheng Tok, Chew-Hong Lee
  • Patent number: 11946616
    Abstract: A light engine and system are disclosed in which the light engine contains a core comprising an opening extending through opposing surfaces and a flexible printed circuit board (PCB). The PCB includes a flexible body disposed on an outside of the core and having independently addressable sets of illumination sources mounted thereto, and flexible legs extending from the body and through the opening. The legs are bent such that a terminal portion of each leg is substantially parallel to the opposing surfaces of the core. Independent control of the sets of illumination sources is provided via the legs. The body is separated into segments, each on a different section of the outside and containing body contacts electrically independent of the body contacts of each other segment. Each leg is associated with a different segment, and contains leg contacts on the terminal portion in electrical contact with the associated body contacts.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventors: Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, Nazila Soleimani, Jeroen Den Breejen, Alan Andrew McReynolds, Gregory Donald Guth
  • Patent number: 11948317
    Abstract: Multi-color flash with image post-processing that uses a camera device with a multi-color flash and implements post-processing to generate images is described. In one aspect, the multi-color flash with image post-processing may be implemented by a controller configured to control a camera and flashes of at least two different colors. The controller may be configured to cause the camera to acquire a first image of a scene while the scene is being illuminated with the first flash but not the second flash, then cause the camera to acquire a second image of the scene while the scene is being illuminated with the second flash but not the first flash, and generate a final image of the scene in post-processing based on a combination of the first image and the second image.
    Type: Grant
    Filed: February 24, 2023
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventors: Charles André Schrama, Nicola Bettina Pfeffer, Arjen Gerben Van der Sijde
  • Patent number: 11946621
    Abstract: An illumination system can produce a dynamically variable illumination pattern. The illumination system can include a light guide. The illumination system can include projection optics, which can contribute to the illumination pattern at relatively low beam angles (i.e., beam angles formed with respect to a surface normal of the light guide). The projection optics can include individually addressable light-producing elements that can direct light through one or more focusing elements. A controller can control which of the light-producing elements are electrically powered and can therefore control the illumination pattern contribution from the projection optics. The illumination system can also include scattering optics, which can contribute to the illumination pattern at relatively high beam angles. The scattering optics can direct light out of the light guide over a relatively large surface area, which can help reduce glare when the light guide is viewed directly.
    Type: Grant
    Filed: April 27, 2023
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventors: Wouter Soer, Johannes Willem Herman Sillevis Smitt
  • Patent number: 11946640
    Abstract: A light source includes a first light emitting diode (LED) die configured to emit a first die color and a second LED die configured to emit a second die color, the first and second LED dies provided on a substrate. A first filling covering the first LED die, and includes a first phosphor to convert the first die color to a first illuminous color. A second filling covering the second LED die and extending to the first filling, and includes a second phosphor to convert the second die color to a second illuminous color that has a higher absorption energy than an illumination energy of the first illuminous color.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: April 2, 2024
    Assignee: LUMILEDS LLC
    Inventors: Marcus Jozef Henricus Kessels, Ton Theunissen, Ralph Hubert Peters, Georg Henninger
  • Patent number: 11949049
    Abstract: Light emitting devices having a first LED with a first phosphor, a second LED with a second phosphor and a third LED with a third phosphor to emit a composite white light are described. The first LED and first phosphor emit the red spectral component, the second LED and the second phosphor emit the blue spectral component and the third LED and third phosphor emit the green spectral component of the composite white light. The green spectral component has at least 30% radiant flux in a deep red spectral wavelength region.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventor: Wouter Soer
  • Patent number: 11949041
    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: Grant
    Filed: December 15, 2022
    Date of Patent: April 2, 2024
    Assignee: Lumileds LLC
    Inventors: Toni Lopez, Venkata Ananth Tamma
  • Patent number: 11940125
    Abstract: An adaptive lighting system comprises an array of independently controllable LEDs, and a metalens positioned to collimate, focus, or otherwise redirect light emitted by the array of LEDs. The adaptive lighting system may optionally include a pre-collimator positioned in the optical path between the array of LEDs and the metalens.
    Type: Grant
    Filed: April 13, 2023
    Date of Patent: March 26, 2024
    Assignee: Lumileds LLC
    Inventors: Venkata Ananth Tamma, Toni Lopez, Nicola Bettina Pfeffer, Marcel Rene Bohmer
  • Patent number: 11942571
    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: Grant
    Filed: April 21, 2020
    Date of Patent: March 26, 2024
    Assignee: Lumileds LLC
    Inventors: Venkata Ananth Tamma, Toni Lopez
  • Patent number: 11942507
    Abstract: Described are light emitting diode (LED) devices comprising a plurality of mesas defining pixels, each of the plurality of mesas comprising semiconductor layers, an N-contact material in a space between each of the plurality of mesas, a dielectric material which insulates sidewalls of the P-type layer and the active region from the metal. Each of the mesas is spaced so that there is a pixel pitch in a range of from 10 ?m to 100 ?m and dark space gap between adjacent edges of p-contact layer. The dark space gap may be less than 20% of the pixel pitch. The dark space gap may be in a range of from 4 ?m to 10 ?m.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: March 26, 2024
    Assignee: Lumileds LLC
    Inventors: Erik William Young, Dennis Scott, Rajat Sharma, Toni Lopez, Yu-Chen Shen
  • Patent number: 11942587
    Abstract: A semiconductor light-emitting device includes a junction or active layer between doped semiconductor layers coextensive over a contiguous device area, corresponding sets of electrical contacts connected to the semiconductor layers, and multiple nanostructured optical elements at a surface of one semiconductor layer opposite the other semiconductor layer. Composite electrical contacts of one set include a conductive layer, a transparent dielectric layer between the conductive and semiconductor layers, and vias through the dielectric layer connecting the conductive and semiconductor layers. The nanostructured elements redirect light, propagating laterally in optical modes supported by the semiconductor layers, to exit the device. The composite electrical contacts can be independent and define independently addressable pixel areas of the device. The nanostructured elements and thin semiconductor layers can yield high contrast between adjacent pixel areas without trenches between them.
    Type: Grant
    Filed: May 2, 2023
    Date of Patent: March 26, 2024
    Assignee: Lumileds LLC
    Inventors: Toni Lopez, Aimi Abass
  • Patent number: 11940144
    Abstract: A luminaire can include a curved light guide plate including a first receiving surface, an emitting surface, a major surface opposing the emitting surface, second and third receiving surfaces, the first receiving surface extending in a first dimension between the major surface and the emitting surface and extending in a second dimension between the second and third receiving surfaces, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) and the second and third receiving surfaces generally planar, and a plurality of LEDs positioned to emit light into one or more of the first: receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.
    Type: Grant
    Filed: May 22, 2023
    Date of Patent: March 26, 2024
    Assignee: Lumileds LLC
    Inventors: Frederic Stephane Diana, Mehdi Aas, Charles André Schrama
  • Patent number: 11935913
    Abstract: A lighting device is disclosed that includes a plurality of light emitting diodes arranged in an array, a plurality of trenches disposed between and optically isolating the light emitting diodes, and a patterned converter layer disposed over an array surface formed by light emitting surfaces of the light emitting diodes and upper surfaces of the trenches, the patterned converter layers including a first region having a first converter and a second region having a second converter different from the first converter, the first region and second region disposed over different areas of the array surface.
    Type: Grant
    Filed: April 5, 2023
    Date of Patent: March 19, 2024
    Assignee: Lumileds LLC
    Inventors: Toni Lopez, Marcel Rene Bohmer
  • Patent number: 11936973
    Abstract: The invention describes an infrared imaging assembly (1) for capturing an infrared image (M0, M1) of a scene (S), comprising an infrared-sensitive image sensor (14); an irradiator (10) comprising an array of individually addressable infrared-emitting LEDs, wherein each infrared-emitting LED is arranged to illuminate a scene region (S1, . . . , S9); a driver (11) configured to actuate the infrared irradiator (10) by applying a switching pulse train (T1, . . . , T9) to each infrared-emitting LED; an image analysis module (13) configured to analyse a preliminary infrared image (M0) to determine the required exposure levels (130) for each of a plurality of image regions (R1, . . . , R9); and a pulse train adjusting unit (12) configured to adjust the duration (L1, . . . , L9) of a switching pulse train (T1, . . . , T9) according to the required exposure levels (130).
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: March 19, 2024
    Assignee: Lumileds LLC
    Inventors: Arjen Gerben Van der Sijde, Erno Fancsali, Nicola Bettina Pfeffer, Pieter Johannes Quintus van Voorst Vader
  • Patent number: 11935987
    Abstract: A light emitting diode (LED) array comprises non-segmented pixels in a light-emitting pixel area providing optical efficiency and minimizing dark-grid appearance. The LED array comprises: a monolithic body, a light-emitting pixel area, a plurality of anodes, a common cathode, and one or more dielectric materials. The light-emitting pixel area is integral to the monolithic body. The light-emitting pixel area includes semiconductor layers comprising: a second portion of an N-type layer, an active region, and a P-type layer. The monolithic body comprises a first portion of an N-type layer, and the second portion of the N-type layer is integral to the first portion of the N-type layer. Each anode comprises a P-contact layer and one or more P-contact materials, each P-contact layer is in contact with the P-type layer. The common cathode comprises one or more N-contact materials in contact with the first portion of the N-type layer.
    Type: Grant
    Filed: October 25, 2022
    Date of Patent: March 19, 2024
    Assignee: Lumileds LLC
    Inventors: Toni Lopez, Erik William Young, Rajiv Pathak