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公开(公告)号：US20210190481A1
公开(公告)日：2021-06-24
申请号：US17125171
申请日：2020-12-17
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar
Abstract: An apparatus projecting light onto a projection surface comprises: a substrate having disposed thereon two or more LED clusters and two or more micro-lenses, each LED cluster comprising a plurality of LEDs and each of the micro-lenses being disposed the plurality of LEDs. Each of the LED clusters is arranged to emit light through each of the micro-lenses in a pattern of dots. A center of at least one LED cluster is off-set from an optical center of the micro-lens of its LED cluster. A projected image includes arrangements of individual dots and/or areas of smooth light resulting from the pattern of dots.
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公开(公告)号：US10930828B2
公开(公告)日：2021-02-23
申请号：US16336408
申请日：2017-09-15
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar , Emanuel Nicolaas Hermanus Johannes Stassar , Erno Fancsali , Chunxia Feng , Rob Jacques Paul Engelen
IPC: H01L33/58 , F21V5/04 , F21Y107/40 , F21Y115/10 , G02B27/09
Abstract: A light source includes a light-emitting diode or device (LED) and an optic mounted over the LED. The LED emits a first radiation pattern that is non-rotationally symmetric about a first axis. The optic collects the first radiation pattern and projects a second radiation pattern that is rotational symmetric about a second axis and has a peak intensity that is angled from the second axis.
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公开(公告)号：US20200312075A1
公开(公告)日：2020-10-01
申请号：US16755007
申请日：2018-09-14
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar
Abstract: The invention describes a method (100) for counterfeit detection using a portable device (1) with installed counterfeit detection application, to a data carrier (30) comprising this counterfeit detection application, to the portable device (1) used in this method and to a cover (50) comprising guiding structures to perform this method comprising the steps of taking multiple overlapping pictures (110) from at least a portion of the object (10) with the camera (2) of the portable device (1) positioned in front of the object (10) during relatively moving (RM) the portable device with respect to and (1) along the object (10); combining (120) all taken pictures to a single combined image of at least the portion of the object (10) with increased resolution by the counterfeit detection application (4) executed on the portable device (1); applying image processing (130) to the combined image by the counterfeit detection application (4) providing an improved image with improved properties compared to the combined image to order to visualize or enhance the hidden features of the object (10) comprising an increased contrast in the infrared and/or ultraviolet wavelength range being transmitted by the adapted band pass filter (3); and comparing (140) the improved image with the visualized or enhanced hidden features of the object (10) with a reference image of the object (10) comprising the hidden features by the counterfeit detection application (4) to provide (200) an authentication result for the performed counterfeit detection.
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公开(公告)号：US11817431B2
公开(公告)日：2023-11-14
申请号：US17223856
申请日：2021-04-06
Applicant: Lumileds LLC
Inventor： Rob Jacques Paul Engelen , Frans Hubert Konijn , Charles André Schrama , Emanuel Nicolaas Hermanus Johannes Stassar , Erno Fancsali , Varun Dev Kakkar , Nicola Bettina Pfeffer
IPC: H01L25/075 , H01L33/50 , H01L33/06 , H01L33/32 , H01L33/62
CPC classification number: H01L25/0753 , H01L33/505 , H01L33/06 , H01L33/32 , H01L33/502 , H01L33/62
Abstract: The invention describes a light emitting diode array module (30) comprising a plurality of light emitting diode structures (10a, 10b), wherein the light emitting diode structures (10a,10b) are arranged such that there is an optical cross talk between the light emitting diode structures (10a, 10b) during operation of the light emitting diode array module (30), wherein at least a first light emitting diode structure (10a) of the plurality of light emitting diode structures (10a, 10b) is characterized by a first color, and wherein at least a second light emitting diode structure (10b) of the plurality of light emitting diode structures (10a, 10b) is characterized by a second color different than the first color, wherein the first color, the second color and the optical cross talk between the light emitting diodes are arranged to provide a predefined light distribution in a reference plane (40) perpendicular to an optical axis (50) of the light emitting diode an-ay module (30). The invention further describes a lighting device comprising one or more LED array modules (30).
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公开(公告)号：US11199755B2
公开(公告)日：2021-12-14
申请号：US16867113
申请日：2020-05-05
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar , Arjen Van Der Sijde , Erno Fancsali , Chunxia Feng , Nicola Bettina Pfeffer
Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
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Patent Agency Ranking
公开(公告)号：US11137665B2
公开(公告)日：2021-10-05
申请号：US16071784
申请日：2017-01-16
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar , Arjen Van Der Sijde , Erno Fancsali , Chunxia Feng , Nicola Pfeffer
Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
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公开(公告)号：US20210026059A1
公开(公告)日：2021-01-28
申请号：US17071294
申请日：2020-10-15
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar , Erno Fancsali , Frans Hubert Konijn
IPC: F21V8/00
Abstract: A thin plastic light guide is formed to have cavities on one surface and TIR (total internal reflection) structures directly above the cavities. LEDs mounted on a printed circuit board are positioned hi the cavities. The cavity walls are shaped to refract the LED light and direct the LED light toward the TIR structures to most efficiently make use of the TIR structures. The TIR structures may have a cusp or cone shape. The top ceiling of the cavities may be shaped to direct light at the TIR structure so as to leak through the TIR structure and blend the light with light leaking through surrounding portions of the light guide. The LEDs may be distributed only near the edges of the light guide or over the entire back surface of the light guide. A diffuser sheet may be laminated over the light guide to further mix the light.
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公开(公告)号：US20190326350A1
公开(公告)日：2019-10-24
申请号：US16403277
申请日：2019-05-03
Applicant: Lumileds LLC
Inventor： Charles Schrama , Varun Dev Kakkar , Erno Fancsali
Abstract: Described herein is source sensitive optic that uses reconfigurable chip-on-board (CoB) light emitting diode (LED) arrays as light sources. In an implementation, the reconfigurable CoB LED array includes a predetermined number of LEDs that are configurable for a variety of illumination scenarios. In an implementation, the reconfigurable CoB LED array is multiple CoB LED arrays that are configured for use with the source sensitive optic as described herein. The source sensitive optic includes surface shapes that are responsive to the reconfigurable CoB LED array. The source sensitive optic is configured to provide beam profile and radiation pattern differentiation based on a CoB LED array configuration configured from the reconfigurable CoB LED. Each configurable CoB LED array configuration radiates a different beam pattern via the surface shapes due to proximity and surface shape geometries.
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公开(公告)号：US20230288194A1
公开(公告)日：2023-09-14
申请号：US18307054
申请日：2023-04-26
Applicant: Lumileds LLC
Inventor： Varun Dev Kakkar
CPC classification number: G01B11/2513 , G01B11/25 , H01L25/0753 , H01L33/30 , H01L33/58 , H01L33/62 , H01L33/32 , H01L2933/0066 , H01L2933/0058 , G06V10/145
Abstract: An apparatus projecting light onto a projection surface comprises: a substrate having disposed thereon two or more LED clusters and two or more micro-lenses, each LED cluster comprising a plurality of LEDs and each of the micro-lenses being disposed the plurality of LEDs. Each of the LED clusters is arranged to emit light through each of the micro-lenses in a pattern of dots. A center of at least one LED cluster is off-set from an optical center of the micro-lens of its LED cluster. A projected image includes arrangements of individual dots and/or areas of smooth light resulting from the pattern of dots.
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公开(公告)号：US11714293B2
公开(公告)日：2023-08-01
申请号：US16910823
申请日：2020-06-24
Applicant: Lumileds LLC
Inventor： Venkata Ananth Tamma , Toni Lopez , Varun Dev Kakkar
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.
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