US Pat. No. 9,966,507

WAVELENGTH CONVERTING MATERIAL FOR A LIGHT EMITTING DEVICE

Lumileds Holding B.V., S...

1. A wavelength converting material comprising AE3?x1?y+zRE3?x2+y?z[Si9?wAlw(N1?yCy)[4](N16?z?wOz+w)[2]]:Eux1,Cex2, where AE=Ca, Sr, Ba; RE=Y, Lu, La, Sc; 0?x1?0.18; 0?x2?0.2; x1+x2>0; 0?y?1; 0?z?3; 0?w?3.

US Pat. No. 10,018,316

HEADLIGHT MODULE

Lumileds Holding B.V., S...

1. A headlight module for outputting a low beam profile including a cut off section for projection towards a driver-side road section, the headlight module comprising:an exit lens comprising an optical axis extending through said exit lens;
a low beam unit for generating at least a portion of said low beam profile, the low beam unit comprising:
a first LED for generating a first luminous distribution; and
a reflector structure for reflecting the first luminous distribution onto a first region of the exit lens to generate said at least portion of the low beam profile;
a second beam unit in between the low beam unit and the exit lens, the further beam unit comprising:
a second LED; and
a collimating element being optically coupled with the second LED through a light input window and having a light output window facing the exit lens such that the light output window generates a second luminous distribution onto a second region of the exit lens, the collimating element comprising a surface including a stepped profile for generating said cut off section, wherein the second luminous distribution is a further portion of the low beam profile, said further portion including the cut off section, and wherein the stepped profile delimits the light output window,
wherein the headlight module further comprises a planar shutter element positioned within the light path of the reflected first luminous distribution, substantially parallel with the surface, for creating an upper horizontal cut-off to the lower beam profile, the planar shutter element comprising
a first planar portion positioned adjacent to a first lateral side of the surface, and having a first curved front edge which curves toward the exit lens, and
a second planar portion positioned adjacent to a second lateral side of the surface, and having a second curved front edge which curves toward the exit lens.

US Pat. No. 10,208,929

LED LIGHTING ARRANGEMENT

Lumileds Holding B.V., S...

1. A lighting arrangement, comprising:a support member;
at least one LED lighting element arranged on the support member;
at least one optical element to receive light emitted from the LED lighting element; and
a holder, comprising:
an optical sub-holder; and
a connecting sub-holder connecting the optical sub-holder with the support member;
wherein:
the connecting sub-holder is suitably shaped so that the optical sub-holder bridges the connecting sub-holder over the LED lighting element to carry the optical element in a desired position relative to the LED lighting element suitable to shape the received light in a desired way;
at least the optical sub-holder comprises at least one stress release element dividing the optical sub-holder in one or more outer parts connected to the connecting sub-holder and a main part carrying the optical element; and
a mechanical connection between the main part and the one or more outer parts is weakened by the stress release element extending through the optical sub-holder and having a suitable shape and length to maintain the required mechanical connection between the main part and the one or more outer parts suitable to carry the main part and to enable the one or more outer parts to deform freely in case of thermal stress while maintaining a main part position of the main part being closer to the desired position compared to an outer part position of the one or more outer parts.

US Pat. No. 10,170,670

WAVELENGTH CONVERTING MATERIAL FOR A LIGHT EMITTING DEVICE

Lumileds Holding B.V., S...

1. A device comprising:a wavelength converting material comprising:
a cubic crystal structure;
an Eu2+ dopant;
cubic coordination of at least one Eu2+ dopant site by X[2] (X?N, O) atoms;
star-shaped Y(SiX4)4 (Y?C, N) host lattice building blocks;
AE, where AE=Ca, Sr, Ba; and
RE, where RE=Y, Lu, La, Sc.

US Pat. No. 10,290,675

LIGHT EMITTING DIODE MODULE AND METHOD OF FORMING A LIGHT EMITTING DIODE MODULE

Lumileds Holding B.V., S...

1. A light emitting diode module comprising:a light emitting diode assembly comprising a plurality of light emitting diodes, the light emitting diode assembly having a first output window from which light emitted by the said plurality of light emitting diode is output;
a light directing element comprising a first input window and a second output window, wherein the light directing element is adapted to receive light at the first input window and direct the received light to be output at the second output window,
wherein:
the light directing element is positioned to receive light output from the first output window at the first input window;
the second output window has a smaller area than the first output window; and
the second output window is in a plane substantially normal to a plane of the first output window;
an additional light emitting diode assembly comprising a plurality of additional light emitting diodes, the additional light emitting diode assembly having a third output window from which light emitted by the said plurality of additional light emitting diodes is output; and
an additional light directing element comprising a second input window and a fourth output window, wherein the light directing element is adapted to receive light at the second input window and direct the received light to be output at the fourth output window,
wherein
the additional light directing element is positioned to receive light output from the third output window at the second input window;
the fourth output window has a smaller area than the third output window; and
the fourth output window is in a plane substantially normal to a plane of the third output window;
wherein
the light directing element and the additional light directing element are being positioned back-to-back; and
the light emitting diode assembly and the additional light emitting diode assembly are both mounted on a single substrate comprising a flexible portion.

US Pat. No. 10,490,719

DIE BOND PAD DESIGN TO ENABLE DIFFERENT ELECTRICAL CONFIGURATIONS

Lumileds Holding B.V., S...

1. A light emitting diode (LED) device comprising:an LED die comprising a plurality of light emitting elements, each of the plurality of light emitting elements including a pair of bond pads coupled thereto, each of the bond pads having a rectangular shape with four orthogonal edges, and at least one of the bond pads in each pair having at least one truncated corner, each of the truncated corners forming an additional, non-orthogonal edge,
the plurality of light emitting elements being arranged within the die such that at least two diagonally opposite bond pads are truncated and have non-orthogonal edges that face one another.

US Pat. No. 10,400,986

EXTREMELY WIDE DISTRIBUTION LIGHT-EMITTING DIODE (LED) LENS FOR THIN DIRECT-LIT BACKLIGHT

Lumileds Holding B.V., S...

1. A light emitting device comprising:a light source including a light emitting surface;
an optical lens coupled to the light source, the optical lens including an inner curved surface and an outer curved surface, the inner curved surface of the optical lens located opposite the light emitting surface of the light source; and
a beam shaping element coupled to the optical lens, the beam shaping element including an inner surface and an outer surface, the inner surface of the beam shaping element located opposite the outer curved surface of the optical lens and including a reflective pattern, the beam shaping element configured to scatter and redirect at least a fraction of light originating from the light source and refracted from the optical lens creating a uniform light intensity distribution pattern on a light field above the light emitting device.

US Pat. No. 10,253,938

LIGHTING ARRANGEMENT WITH EXACT POSITIONING OF AN OPTICAL ELEMENT

Lumileds Holding B.V., S...

1. A vehicle lighting arrangement comprisingat least one LED element with a light emitting surface,
a reference frame part comprising a frame opening of rectangular shape bordered by frame edges,
the LED element being arranged such that light from the light emitting surface is emitted through the frame opening and is partially shielded at least by a first frame edge,
the light emitting surface of the LED element extends at least up to the frame edges to ensure that the frame opening is entirely illuminated, such that the frame edges constitute the exact borders of an effective light emitting surface of the LED element,
the reference frame part further comprising reference portions to define positions relative to the frame opening, the reference portions including at least
a first reference portion on a first surface portion of the reference frame part arranged parallel to the light emitting surface,
a second reference portion on a second surface portion of the reference frame part arranged perpendicular to the first surface portion, and
a third reference portion on a third surface portion of the reference frame part arranged perpendicular to both the first and second surface portions,
and an optical element for shaping an illumination beam from light emitted from the LED element through the frame opening, the optical element being arranged to be in contact with the reference frame part at the first, second and third reference portions to define a position of the optical element relative to the frame opening.

US Pat. No. 10,564,345

OUT-COUPLING STRUCTURE FOR A LIGHT GUIDE

Lumileds Holding B.V., S...

1. A LED backlight system, comprising:a plurality of backlight segments, each backlight segment supporting a sidelight emitting LED;
a light guide included in each backlight segment, with the light guide further defining a cavity having a top and sidewalls, with the sidelight emitting LED positionable in the cavity; and
at least one of a reflective layer and a top out-coupling structure positioned between the top of the cavity and the sidelight emitting LED,
wherein a sidewall in-coupling structure is formed or defined in the sidewalls of the cavity.

US Pat. No. 10,539,289

LASER LIGHTING MODULE WITH SAFETY FUNCTION

LUMILEDS HOLDING B.V., S...

1. A laser lighting module for a vehicle headlight comprising:at least one laser;
a scanning arrangement;
a light conversion device;
a safety mirror;
a safety detector; and
a safety controller;
wherein the at least one laser is arranged to emit laser light characterized by a first wavelength range,
wherein the scanning arrangement is arranged to move a laser beam of the laser light within a scanning solid angle such that a laser spot of the laser light is moved across a light entrance surface of the light conversion device,
wherein the light conversion device comprises a light converter,
wherein the light converter is arranged to convert a fraction of the laser light to converted light, wherein the converted light is characterized by a second wavelength range different than the first wavelength range,
wherein the light conversion device comprises a light emission surface arranged to emit a mixture of transmitted laser light and converted light,
wherein the safety mirror is arranged within the scanning solid angle such that at least 90% of the transmitted laser light emitted within the scanning solid angle hits the safety mirror,
wherein the safety mirror is arranged to provide safety detection light by reflecting a fraction of the transmitted laser light hitting the safety mirror to the safety detector, wherein the safety detector arranged to generate, irrespective of any polarization of the safety detection light, at least one control signal upon detection of the safety detection light, wherein the safety controller is arranged to receive the at least one control signal from the safety detector, and
wherein the safety controller is arranged to switch off the at least one laser if the at least one control signal exceeds a first threshold value.

US Pat. No. 10,295,141

LIGHTING STRIP AND LIGHTING DEVICE

Lumileds Holding B.V., S...

1. A lighting strip, comprising:a flexible printed circuit strip comprising a plurality of wiring portions and a plurality of carrying portions, the plurality of wiring portions configured to supply electrical power to the plurality of carrying portions;
a plurality of solid-state lighting elements respectively disposed on the plurality of carrying portions,
the plurality of wiring portions including at least one pitch adjusting portion configured to adjust a pitch between two adjacent carrying portions and to enable the flexible printed circuit strip to be arranged in a three-dimensional shape.

US Pat. No. 10,602,074

ADAPTIVE LIGHT SOURCE

Lumileds Holding B.V., S...

1. A method, comprising:capturing a first image of a scene under ambient lighting;
illuminating the scene with a first amount of light from a light source that includes an array of light emitting diodes (LEDs);
capturing a second image of the scene while illuminating the scene with the first amount of light;
for portions of the scene that correspond to individual LEDs in the array, determining a distance from the light source to each portion;
calculating a relative amount of light for each portion of the scene based on the first image, the second image, and the corresponding determined distance from the light source to the portion;
determining, from the calculated relative amounts of light, that a first portion of the scene and a second portion of the scene receive different amounts of light;
providing a first amount of current, based on the calculated relative amounts of light, to a first LED of the array of LEDs to illuminate the first portion of the scene;
providing a second amount of current, different from the first amount and based on the calculated relative amounts of light, to a second LED of the array of LEDs to illuminate the second portion of the scene; and
capturing a final image of the scene while illuminating the first portion of the scene with light from the first LED and illuminating the second portion of the scene with light from the second LED.

US Pat. No. 10,533,132

LUMINESCENT MATERIALS

Lumileds Holding B.V., (...

1. A luminescent material comprising AE1-xLi2Be4O6:Eux, wherein AE=one or more of Sr, Ba, Ca and 0.002

US Pat. No. 10,260,695

LIGHT CONVERSION MODULE WITH IMPROVED CONTRAST

LUMILEDS HOLDING B.V., S...

1. A light conversion module comprising:a transparent substrate,
a conversion layer attached to a light exit side of the substrate, wherein the conversion layer is arranged
to convert a part of laser light of a first wavelength range entering the substrate via a light entrance side to converted laser light of a second wavelength range different from the first wavelength range, and
to transmit another part of the laser light, such that a mixture of the transmitted laser light and of a part of the converted laser light leaves the conversion layer in forward direction opposite to the side where the conversion layer is attached to the light exit side of the substrate, and
wherein the substrate is arranged so that converted laser light entering the substrate via the light exit side is inhibited to re-enter the conversion layer via the light exit side by arranging a thickness of the substrate perpendicular to the light exit side, thus the converted laser light entering the substrate which is totally reflected at the light entrance side of the substrate does not hit the conversion layer after one total reflection at the light entrance side.

US Pat. No. 10,600,937

PRECISE BONDLINE CONTROL BETWEEN LED COMPONENTS

LUMILEDS HOLDING B.V., (...

1. A device comprising:a light emitting diode;
a wavelength converting phosphor layer; and
an adhesive layer bonding the light emitting diode to the wavelength converting phosphor layer, the adhesive layer comprising:
a plurality of spacers dispersed in
a silicone matrix, the diameters of the spacers determining a thickness of the adhesive layer;
wherein the plurality of spacers have a size distribution with a mean diameter of between 1 and 5 microns and a coefficient of variation of less than 5%.

US Pat. No. 10,591,131

LIGHTING ARRANGEMENT WITH A SPATIALLY CONTROLLABLE REFLECTOR ELEMENT

LUMILEDS HOLDING B.V., S...

1. A lighting arrangement, comprising:a plurality of LED lighting elements,
a plurality of collimator elements arranged to collimate light emitted from the lighting elements wherein the light output surfaces of the collimator elements have a first extension in a first direction and a second extension in a second direction perpendicular to the first direction, the second extension being larger than the first extension;
a spatially controllable reflector element comprising a plurality of reflector elements adjustable at least between a first and second position, wherein the spatially controllable reflector element has a switching direction of the reflector elements,
a first projection element arranged to project light emitted from the collimator elements onto the spatially controllable reflector element,
a second projection element,
wherein in the first position of the reflector elements the light from the first projection element is reflected into the direction of a second projection element to form a projected illumination beam,
wherein in the second position of the reflector elements the light is reflected into a different direction to not contribute to the projected illumination beam, and
wherein the second extension is arranged in parallel to the switching direction.

US Pat. No. 10,553,766

METHOD OF MANUFACTURING AN LED MODULE

LUMILEDS HOLDING B.V., S...

1. A flexible LED module comprising:a plurality of LEDs;
a translucent flexible encapsulant comprising a plurality of layers to enclose the plurality of LEDs; and
a scattering pattern formed on the surface of at least one of the plurality of layers to comprise at least one dense scattering region corresponding to the position of one of the plurality of LEDs of the LED module; to comprise at least one sparse scattering region that does not correspond to the position of one of the plurality of LEDs of the LED module; and to comprise a transition region between a dense scattering region and the at least one sparse scattering region
wherein the translucent encapsulant comprises an inner layer applied onto the LED module, and a patterned layer applied onto the inner layer, and
wherein the patterned layer comprises a further scattering pattern on an inner surface adjoining the inner layer.

US Pat. No. 10,551,019

ILLUMINATION DEVICE FOR A VEHICLE HEADLIGHT

Lumileds Holding B.V., S...

1. An illumination device, in particular for a vehicle headlight, at least comprisingone or several light sources emitting light of a first wavelength or wavelength range,
a wavelength converting member converting at least part of the light of the first wavelength or wavelength range into light of a second wavelength or wavelength range,
a first and a second light guiding element, said first light guiding element being arranged between the one or several light sources and the second light guiding element and said second light guiding element being arranged between the first light guiding element and the wavelength converting member, and
a reflective member being attached to a side of the wavelength converting member opposite to the second light guiding element to reflect the light of the second wavelength or wavelength range back through the wavelength converting member to the second light guiding element,
wherein the second light guiding element is designed to guide the light emitted by the one or several light sources and having passed through the first light guiding element to the wavelength converting member and to guide the light of the second wavelength or wavelength range which has been reflected at the reflective member to the first light guiding element,
wherein the first light guiding element comprises at least one first guiding structure guiding the light emitted by said one or several light sources to the second light guiding element and at least one second guiding structure guiding the light of the second wavelength or wavelength range which has been reflected at the reflective member and passed through the second light guiding element to an outcoupling surface of the first light guiding element, and
wherein said at least one first guiding structure guides the light emitted by said one or several light sources through a first part of a cross sectional area of the first light guiding element, and said at least one second guiding structure guides at least a portion of the light of the second wavelength or wavelength range through a second part of the cross sectional area of the first light guiding element, the second part of the cross sectional area excluding and being larger than the first part of the cross sectional area.

US Pat. No. 10,473,313

FLEXIBLE ELECTRICAL COUPLING DEVICE FOR A LIGHTING SYSTEM

LUMILEDS HOLDING B.V., S...

1. An electrical coupling device for coupling one or more functional elements of a lighting system, the electrical coupling device comprising:a first wire;
a second wire;
at least one spacer arranged to provide a first defined distance between the first wire and the second wire at the position of the spacer;
at least one coupling spacer physically separated from the at least one spacer and arranged to provide a second defined distance between the first wire and the second wire at the position of the coupling spacer and to electrically couple at least one of the one or more functional elements to the electrically coupling device; and
at least one flexibility enhancement device arranged to reduce mechanical stress to the first wire and the second wire,
wherein the at least one coupling spacer, the at least one spacer, the first wire and the second wire are embedded in a flexible cover to enable bending in all three dimensions at a position between the at least one spacer and the at least one coupling spacer.

US Pat. No. 10,601,317

SYSTEMS, APPARATUS AND METHODS OF ZERO CURRENT DETECTION AND START-UP FOR DIRECT CURRENT (DC) TO DC CONVERTER CIRCUITS

Lumileds Holding B.V., S...

1. A device comprising:a power stage circuit comprising an inductor and a capacitor;
a switch electrically coupled to the power stage circuit;
a controller electrically coupled to the switch and configured to provide a control signal to control the switch to charge and discharge the inductor between a zero current state and a peak current state to provide a light emitting diode (LED) drive current;
an RC circuit electrically coupled to the power stage circuit and comprising at least a first resistive element and a second resistive element coupled in series with a capacitive element; and
a zero current detection circuit having a first input electrically coupled to a node between the first resistive element and the second resistive element, a second input electrically coupled to a threshold voltage, and an output electrically coupled to the controller.

US Pat. No. 10,584,847

EXTREMELY WIDE DISTRIBUTION LIGHT-EMITTING DIODE (LED) LENS FOR THIN DIRECT-LIT BACKLIGHT

Lumileds Holding B.V., S...

1. A system, comprising:a lens configured to shape light emitted from a light-emitting diode to form shaped light; and
a beam-shaping element coupled to the lens and positioned to receive at least some of the shaped light,
the beam-shaping element including an incident surface that faces the lens,
the incident surface including a pattern of reflective elements that are configured to reflect a first portion of the shaped light toward the lens,
the incident surface allowing a second portion of the shaped light to propagate through the beam-shaping element through one or more spaces between adjacent reflective elements in the pattern.

US Pat. No. 10,578,278

OPTICAL LENS FOR EXTREMELY THIN DIRECT-LIT BACKLIGHT

Lumileds Holding B.V., S...

1. A light-emitting device, comprising:a light source configured to emit light in an angular distribution that is substantially symmetric about an optical axis; and
a lens configured to redistribute the light emitted from the light source,
the lens including a concave inner surface that faces the light source,
the lens including a substantially planar surface that is substantially orthogonal to the optical axis and extends radially outward from a periphery of the concave inner surface,
the planar surface including a coated annular region on which a coating is disposed,
the coating configured to absorb at least a portion of the light inside the lens that strikes the coated annular region,
the planar surface further including an uncoated inner annular region between the coated annular region and the concave inner surface,
the planar surface further including an uncoated outer annular region between the coated annular region and an outer periphery of the planar surface,
the lens including an outer surface that faces away from the light source and adjoins the planar surface at the outer periphery of the planar surface,
the outer surface including a cylindrical portion positioned adjacent to the planar surface, such that all locations on the cylindrical portion are substantially equidistant from the optical axis.

US Pat. No. 10,527,247

EFFICIENT WHITE LAMP FOR VEHICLE HEADLIGHT

LUMILEDS HOLDING B.V., S...

1. An incandescent lamp comprising:a transparent vessel,
wherein the transparent vessel encloses at least one filament,
wherein the transparent vessel is at least partly covered with a coating,
wherein the coating comprises at least one pigment, wherein the at least one pigment is arranged such that light emitted by the at least one filament and traversing the coating is transformed to transformed light,
wherein the transformed light is characterized by a chromaticity according to the CIE 1931 xy-chromaticity with y being in between the Planckian locus and y=0.5*x+0.205 and 0.36 wherein the at least one pigment comprises a mixture of Co—Al oxide and Co—Al—Cr oxide, the mixture being characterized by a ratio of a concentration in mass percentage Cm(Co—Al oxide) of Co—Al oxide and a concentration in mass percentage Cm(Co—Al—Cr oxide) of Co—Al—Cr oxide in the coating of 90/10?Cm(Co—Al oxide)/Cm(Co—Al—Cr oxide)?30/70.

US Pat. No. 10,529,894

CONTACT ETCHING AND METALLIZATION FOR IMPROVED LED DEVICE PERFORMANCE AND RELIABILITY

Lumileds Holding B.V., S...

1. A light emitting device comprising:a semiconductor structure comprising an active layer between a first-type semiconductor layer and a second-type semiconductor layer;
a reflective layer over the semiconductor structure;
a via in the reflective layer, the second-type semiconductor layer and the active layer, the via having walls within the semiconductor structure that are substantially orthogonal to a surface of the active layer;
a dielectric structure comprising, within the via, a first surface facing a center of the via that extends from a top surface of the reflective layer to the first-type semiconductor layer to form an acute angle with the first-type semiconductor layer, a second surface facing the walls of the via that is substantially orthogonal to the surface of the active layer and a third surface facing the first-type semiconductor layer that is parallel to the surface of the active layer; and
a metal layer on the dielectric structure and contacting the first-type semiconductor layer.

US Pat. No. 10,520,152

LASER-BASED LIGHT SOURCE WITH LIGHT EMISSION CONTROL

LUMILEDS HOLDING B.V., S...

1. A laser-based light source comprising at least one or more lasers, at least one conversion device and at least one manipulation device, wherein the one or more lasers are adapted to emit first laser light, wherein the first laser light comprises linearly polarized laser light with a first polarization component parallel to a plane of incidence of the first laser light with respect to a first surface of the conversion device and a second polarization component perpendicular to the plane of incidence, wherein the conversion device is adapted to convert a first part of the first laser light to first light and to reflect a second part of the first laser light at the first surface of the conversion device, wherein the first light is in a different wavelength range as the first laser light, and wherein the manipulation device is arranged to manipulate a first intensity of the first part and a second intensity of the second part using an angular dependence of the reflection of the first and the second polarization component of the first laser light at the first surface of the conversion device.

US Pat. No. 10,516,082

DEVICE FOR EMITTING LIGHT

LUMILEDS HOLDING B.V., (...

1. A device for emitting light, comprising:a light generating element for generating light,
a coating layer for converting the light generated by the light generating element, the coating layer being dispensed on a top surface of the light generating element, wherein the coating layer comprises
a nano-composite including a plurality of nano-particles,
a dispersion medium for dispersing the plurality of nano-particles, and
a first composition comprising a weak acid or a salt thereof, the weak acid or the salt selected from at least one of benzoic acid, an acid forming the end group of a polydimethylsiloxane chain, potassium benzoate, caesium benzoate, lithium benzoate, calcium benzoate, and sodium benzoate.

US Pat. No. 10,517,156

HYBRID DRIVING SCHEME FOR RGB COLOR TUNING

Lumileds Holding B.V., S...

1. A device comprising:an analog current division circuit configured to divide an input current into a first current and a second current; and
a multiplexer array including a plurality of switches to:
provide the first current to a first of three colors of LEDs and the second current to a second of three colors of LEDs simultaneously during a first portion of a period,
provide the first current to the second of three colors of LEDs and the second current to a third of three colors of LEDs simultaneously during a second portion of the period, and
provide the first current to the first of three colors of LEDs and the second current to the third of three colors of LEDs simultaneously during a third portion of the period.