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Lumileds Llc patents


Recent patent applications related to Lumileds Llc. Lumileds Llc is listed as an Agent/Assignee. Note: Lumileds Llc may have other listings under different names/spellings. We're not affiliated with Lumileds Llc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Lumileds Llc-related inventors


Wavelength converting material for a light emitting device

Embodiments of the invention include a wavelength-converting material defined by 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.. . ... Lumileds Llc

Semiconductor light emitting device with reflective side coating

A semiconductor light emitting device (100;200;300;400,400b,400c;500;600;700) may have a reflective side coating (120;220;320;420;520;620;720) disposed on a sidewall (118;215;315;415,435;515) of a semiconductor light emitting device structure. Such a device may be fabricated by dicing a semiconductor structure to separate a semiconductor light emitting device structure and then forming a reflective side coating (120;220;320;420;520;620;720) on a sidewall (118;215;315;415,435;515) of the separated semiconductor light emitting device structure.. ... Lumileds Llc

Controlled led light output by selective area roughening

The surface of a light emitting device is roughened to enhance the light extraction efficiency of the surface, but the amount of roughened area is selected to achieve a desired level of light extraction efficiency. Photo-lithographic techniques may be used to create a mask that limits the roughening to select areas of the light emitting surface. ... Lumileds Llc

An led lighting device

The invention provides an led lighting device comprising first and second led arrangements. Each led arrangement is positioned on a respective substrate portion so as to form a respective led module, where each led arrangement is positioned on its substrate portion so as to be substantially within a single side of a substrate portions surface. ... Lumileds Llc

Wavelength converted light emitting device

In a method according to embodiments of the invention, for a predetermined amount of light produced by a light emitting diode and converted by a phosphor layer comprising a host material and a dopant, and for a predetermined maximum reduction in efficiency of the phosphor at increasing excitation density, a maximum dopant concentration of the phosphor layer is selected.. . ... Lumileds Llc

Device for emitting light

The present invention relates to 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.. . ... Lumileds Llc

Light emitting diode module and method of forming a light emitting diode module

The invention provides an led module having a concentrated light output window. Light output from a first output window of an led assembly (e.g. ... Lumileds Llc

A surface mount device and a method of attaching such a device

A device comprises a surface mount component on a substrate, in which the surface mount component is attached by a set of discrete mechanical coupling parts and by a bonding layer. This enables the mechanical coupling properties and the electrical/thermal properties to be optimized separately.. ... Lumileds Llc

Light emitting apparatus

The present invention relates to a light emitting apparatus. The apparatus comprises a high intensity light source configured to emit light of a first wavelength; a beam shaping optical element configured to redistribute the light of the first wavelength emitted by the high intensity light source into an outgoing light beam having a far field beam cross sectional profile having a spatially flat light distribution; and a light converting member configured to be exposed to the outgoing light beam having the spatially flat light distribution, to convert at least a portion of the light of the first wavelength into light of a second wavelength, and to emit the light of the second wavelength.. ... Lumileds Llc

Led package using electoform stencil printing

A method for manufacturing light emitting devices, comprising: providing a package body including: (i) a reflector cup defining a cavity and (ii) a plurality of metal pads disposed at a bottom surface of the cavity; performing reservoir stencil printing to deposit a respective solder pattern on each of the metal pads, the reservoir stencil printing being performed using a 3d electroform stencil that is placed over the reflector cup, the 3d electroform stencil including a lip configured to engage one or more sidewalls of the reflector cup, and a reservoir extending away from the lip and into the cavity; placing an led die on the solder patterns that are formed on the metal pads and performing reflow soldering to attach the led die to the metal pads.. . ... Lumileds Llc

Phosphor deposition system for leds

A method to produce a light-emitting device package includes mounting junctions on pads of a metalized substrate, where the junctions are at least partially electrically insulated from each other, and forming wavelength converters, where each wavelength converter is located over a different junction and separated by a gap from neighboring wavelength converters.. . ... Lumileds Llc

Addressable color changeable led structure

A light-emitting device package includes a metalized substrate, a light-emitting diode (led) die, and a single primary optic. The metalized substrate includes a top surface, pads on the top surface, and traces extending from the pads. ... Lumileds Llc

Compensating for vignetting

A system including an image capture system with a sensing efficiency that varies over a field of view of the image capture system may employ shaped illumination to compensate for the variation in the sensing efficiency. An illuminator may be configured to illuminate the field of view of the image capture system with illumination shaped to have higher intensity where the sensing efficiency is lower, e.g., at the periphery of the field over view. ... Lumileds Llc

Light emitting diodes with sensor segment for operational feedback

Light emitting diodes (leds) having a sensor segment for operational feedback are described. A semiconductor stack is grown on a sapphire substrate. ... Lumileds Llc

06/28/18 / #20180180237

Dimming cap for a lamp with two separate radiation sources

The invention refers to a dimming cap for a lamp with two separate radiation sources and, in particular, for a two-filament incandescent lamp, which has a concave shape with a base surface from which a circumferential side wall extends at least to a height h0 above the base surface, wherein the dimming cap, in a cross section formed at a height h0 parallel to the base surface, has a width (w0) that is constant within a tolerance of ±0.1 mm over a first longitudinal section of the dimming cap, and which decreases over a second longitudinal section extending from the first longitudinal section to a first end of the dimming cap, and the height of the sidewall corresponds within a tolerance of ±0.1 mm over the first longitudinal section to the constant height h0, wherein it increases over the second longitudinal section, wherein the first longitudinal section is between 70% and 98% of the length of the dimming cap in the cross-section formed at the height h0. The invention further refers to a lamp with such a dimming cap.. ... Lumileds Llc

06/21/18 / #20180177007

Method for addressing misalignment of leds on a printed circuit board

Leds for an illumination system may be mounted on a pcb. The pcb may be provided with alignment features such as oversized holes for connection to a support surface. ... Lumileds Llc

06/21/18 / #20180175256

Hybrid chip-on-board led module with patterned encapsulation

Different wavelength conversion materials, or different concentrations of a wavelength conversion material are used to encapsulate the light emitting elements of different colors of a hybrid light emitting module. In an embodiment of this invention, the light emitting elements of a particular color are encapsulated with a transparent encapsulant, while the light emitting elements of a different color are encapsulated with a wavelength conversion encapsulant. ... Lumileds Llc

06/21/18 / #20180175236

Semiconductor light emitting device growing active layer on textured surface

In accordance with embodiments of the invention, at least partial strain relief in a light emitting layer of a iii-nitride light emitting device is provided by configuring the surface on which at least one layer of the device grows such that the layer expands laterally and thus at least partially relaxes. This layer is referred to as the strain-relieved layer. ... Lumileds Llc

06/21/18 / #20180172238

Lens with elongated radiation pattern

An elongated lens (300) is formed with a trough (310) along the long axis on the light emitting surface of the lens. The elongated lens (300) may include a curved wall (325) about its perimeter, and a smooth transition (317) between the curved wall (325) and the trough (310). ... Lumileds Llc

06/14/18 / #20180164495

Light guide with patterned ink

A light-emitting device comprising: a light source; and a light guide that is optically coupled to the light source, the light guide including a plurality of first non-fluorescent light extraction elements and a plurality of second non-fluorescent light extraction elements that are printed on the light guide, each of the first light extraction elements having a reflectance that is higher than a reflectance of any of the second light extraction elements, each of the first light extraction elements having a light transmittance that is lower than a light transmittance of any the second light extraction elements, each of the first light extraction elements having the same shape and size as any other one of the plurality first light extraction elements, and each of the second light extraction elements having the same shape and size as any other one of the plurality of second light extraction elements.. . ... Lumileds Llc

06/14/18 / #20180164491

Led-based light fixture

An illumination system is disclosed that is arranged to compensate for variations in brightness between different leds in the system. The system may include an array of leds coupled to a light guide that is provided with a plurality of light extraction patterns. ... Lumileds Llc

06/14/18 / #20180163939

Headlight module

The invention provides a headlight device capable of generating two distinct, though possibly overlapping, beam portions, by means of a single integrated unit. The unit comprises two primary optical components for generating the two respective beam portions, and a single exit lens through which the combined beam is transmitted. ... Lumileds Llc

06/07/18 / #20180159001

Led fabrication using high-refractive-index adhesives

Silicone-containing adhesive layer formed by cyclic ring-opening polymerization and comprising amounts of an organic base and bonding a wavelength converting layer to a thickness of sapphire in a light-emitting diode (led) apparatus. Methods enabling its uninhibited curing so as to achieve contaminant-free and debris-free adhesion between surfaces. ... Lumileds Llc

06/07/18 / #20180156411

Lighting device with multiple-focus mode

The present invention relates to a lighting device, in particular a headlamp for vehicles, at least comprising an array of light sources, consisting of first and second light sources being mounted within the same flat or curved plane, and a projecting optical system arranged to project light emitted by the light sources in a forward direction of the lighting device. At least one shifting element is arranged in front of said first light sources. ... Lumileds Llc

05/31/18 / #20180149329

Lighting strip and lighting device

Embodiments of the present disclosure relate to a lighting strip, comprising a flexible printed circuit strip which comprises a plurality of wiring portions and a plurality of respective carrying portions, the wiring portions are used to supply electrical power to electric elements disposed on the carrying portions, and the carrying portions protrude from the wiring portions and are adapted to be bent around the wiring portions; a plurality of solid-state lighting elements respectively mounted on the carrying portions; wherein the wiring portion is provided with at least one pitch adjusting portion for adjusting a pitch between two adjacent carrying portions. Embodiments of the present disclosure also relate to a lighting device. ... Lumileds Llc

05/10/18 / #20180129121

Segmented light or optical power emitting device with fully converting wavelength converting material and methods of operation

A segmented light or optical power emitting device and an illumination device are described. The segmented device includes a die having a light or optical power emitting semiconductor structure that includes an active layer disposed between an n-layer and a p-layer. ... Lumileds Llc

05/03/18 / #20180122993

Inorganic bonded devices and structures

An inorganic coating may be applied to bond optically scattering particles or components. Optically scattering particles bonded via the inorganic coating may form a three dimensional film which can receive a light emission, convert, and emit the light emission with one or more changed properties. ... Lumileds Llc

05/03/18 / #20180122989

Methods for growing light emitting devices under ultra-violet illumination

Described herein are methods for growing light emitting devices under ultra-violet (uv) illumination. A method includes growing a iii-nitride n-type layer over a iii-nitride p-type layer under uv illumination. ... Lumileds Llc

04/12/18 / #20180102672

Lighting system including a power backup device

A system is disclosed including, a light source; a converter configured to convert ac voltage to dc operating voltage; a power backup device coupled to the converter; a current source coupled to the power backup device, the current source being powered by the converter, the current source being configured to receive the dc operating voltage generated by the converter through the power backup device, and the current source being configured to output a pulse-width modulated (pwm) signal to the light source based on the dc operating voltage; and a switching device coupled to the power backup device in parallel with the current source, the switching device being configured to couple the light source to the power backup device when the current source is disabled as a result of a supply of ac voltage to the converter being interrupted.. . ... Lumileds Llc

04/05/18 / #20180097158

Light emitting device with phase changing off state white material and methods of manufacture

Light emitting devices (leds) are described herein. An led includes a light emitting semiconductor structure, a wavelength converting material and an off state white material. ... Lumileds Llc

03/29/18 / #20180090645

Reflective structure for light emitting devices

Described is a reflector for light emitting devices. A device includes a reflector in contact with a first n-type region and a second n-type region. ... Lumileds Llc

03/15/18 / #20180074256

Interconnectable light guide tiles

Interlocking light emitting diode (“led”) light guide tiles are disclosed. The tiles have interlocking edge features that provide physical interlock fitting between tiles and present a continuous appearance, both in an “on,” where leds are powered on and emitting light state and an “off” state, where leds are powered off and not emitting light. ... Lumileds Llc

03/15/18 / #20180074255

Luminaire having an asymmetrical light distribution pattern

An apparatus is disclosed including a light guide and a plurality of light emitting diodes (leds). The light guide includes a rear portion including a first edge, a second edge, and a rear edge. ... Lumileds Llc

03/15/18 / #20180073689

Lighting system having reduced melanopic spectral content

A disclosed light-emitting device may provide white light with a cyan gap coinciding with a melanopic sensitivity range and thus having reduced melanopic content. The disclosed light-emitting device may include a light source providing violet or blue light with a peak wavelength under 450 nanometers (nm). ... Lumileds Llc

03/01/18 / #20180062052

White-appearing semiconductor light-emitting devices having a temperature sensitive low-index particle layer

Systems for led illumination products. Solutions to the problems attendant to delivering a white-appearing led product without diminishing efficiency of white light generation are presented. ... Lumileds Llc

02/22/18 / #20180053880

Semiconductor light emitting device with light extraction structures

A light emitting device is described. The light emitting device includes a substrate and a semiconductor structure. ... Lumileds Llc

02/08/18 / #20180040783

Coated wavelength converting nanoparticles

Embodiments of the invention include a luminescent material. Particles of the luminescent material include a core of a first semiconductor material, a first shell of a second semiconductor material surrounding the core, a second shell of an insulating material disposed on a surface of the first shell, and a coating disposed on a surface of the second shell. ... Lumileds Llc

02/01/18 / #20180035500

Dimming led circuit augmenting dc/dc controller integrated circuit

Embodiments include systems, methods, and apparatuses for providing a dimming function in a single stage ac input light emitting diode (led) driver with a controller that contains an on-chip error amplifier and an on-chip fixed reference voltage source coupled to a first input of the error amplifier. The controller controls a duty cycle of a switching transistor to cause a feedback voltage, applied to a first package input terminal, to match the reference voltage. ... Lumileds Llc

02/01/18 / #20180033935

Light emitting device package with reflective side coating

A light-emitting device is disclosed that includes a semiconductor structure having an active region disposed between an n-type layer and a p-type layer; a wavelength converter formed above the semiconductor structure; an insulating side coating formed around the semiconductor structure; and a reflective side coating formed around the wavelength converter above the insulating side coating, the reflective side coating having a top surface that is flush with a top surface of the wavelength converter.. . ... Lumileds Llc

02/01/18 / #20180033923

Wavelength converted semiconductor light emitting device

In embodiments of the invention, a light emitting device includes a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A first wavelength converting layer is disposed in a path of light emitted by the light emitting layer. ... Lumileds Llc

02/01/18 / #20180033912

Iii-p light emitting device with a superlattice

A device includes a semiconductor structure comprising a iii-p light emitting layer disposed between an n-type region and a p-type region. The n-type region includes a superlattice. ... Lumileds Llc

01/11/18 / #20180014373

Printed circuit board for integrated led driver

A multi-layer metal core printed circuit board (mcpcb) has mounted on it at least one or more heat-generating leds and one or more devices configured to provide current to the one or more leds. The one or more devices may include a device that carries a steep slope voltage waveform. ... Lumileds Llc

12/21/17 / #20170365747

Led with high thermal conductivity particles in phosphor conversion layer

In one embodiment, a solid cylindrical tablet is pre-formed for a reflective cup containing an led die, such as a blue led die. The tablet comprises uniformly-mixed phosphor particles and transparent/translucent particles of a high tc material, such as quartz, in a hardened silicone binder, where the index of refraction of the high tc material is matched to that of the silicone to minimize internal reflection. ... Lumileds Llc

12/14/17 / #20170358722

Led with scattering features in substrate

In one embodiment, the transparent growth substrate of an led die is formed to have light scattering areas, such as voids formed by a laser. In another embodiment, the growth substrate is removed and replaced by another substrate that is formed with light scattering areas. ... Lumileds Llc

11/23/17 / #20170338373

Method of forming a p-type layer for a light emitting device

In a method according to embodiments of the invention, a semiconductor structure including a iii-nitride light emitting layer disposed between a p-type region and an n-type region is grown. The p-type region is buried within the semiconductor structure. ... Lumileds Llc

11/23/17 / #20170338369

Methods for using remote plasma chemical vapor deposition (rp-cvd) and sputtering deposition to grow layers in light emitting devices

Described herein are methods for using remote plasma chemical vapor deposition (rp-cvd) and sputtering deposition to grow layers for light emitting devices. A method includes growing a light emitting device structure on a growth substrate, and growing a tunnel junction on the light emitting device structure using at least one of rp-cvd and sputtering deposition. ... Lumileds Llc

11/16/17 / #20170330999

Separating a wafer of light emitting devices

A method of separating a wafer including rows of light emitting devices is described. Dicing streets are provided on the wafer such that a respective one of the dicing streets is provided between each of the rows of light emitting devices on the wafer. ... Lumileds Llc

11/09/17 / #20170324008

Wavelength converting material for a light emitting device

Embodiments of the invention include a wavelength-converting material defined by ae3−x1−y+zre3−x2+y−z[si9-walw(n1−ycy)[4](n16−z−woz+w)[12]]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.. . ... Lumileds Llc

10/26/17 / #20170309791

Luminescent ceramic for a light emitting device

A semiconductor light emitting device comprising a light emitting layer disposed between an n-type region and a p-type region is combined with a ceramic layer which is disposed in a path of light emitted by the light emitting layer. The ceramic layer is composed of or includes a wavelength converting material such as a phosphor. ... Lumileds Llc

10/26/17 / #20170307962

Led flash ring surrounding camera lens

A flash system for an electronic device includes a ring-shaped light guide having a central opening. A camera lens is positioned in or behind the opening. ... Lumileds Llc

08/24/17 / #20170242182

Asymmetrical light intensity distribution from luminaire

In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light leds that inject light into the light guide. ... Lumileds Llc

08/10/17 / #20170229623

Shallow reflector cup for phosphor-converted led filled with encapsulant

An led die conformally coated with phosphor is mounted at the base of a shallow, square reflector cup. The cup has flat reflective walls that slope upward from its base to its rim at a shallow angle of approximately 33 degrees. ... Lumileds Llc








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