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Cree Inc
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Cree Inc patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | Cree Inc-related inventors


 new patent  Lighting devices that comprise one or more solid state light emitters

Light engine modules comprise a support member and a solid state light emitter, in which (1) the emitter is mounted on the support member, (2) a region of the support member has a surface with a curved cross-section, (3) the emitter and a compensation circuit are mounted on the support... Cree Inc

 new patent  Luminaire utilizing waveguide

An optical waveguide comprising orthogonal x- and y-dimensions and developing an illumination distribution pattern comprising orthogonal x- and y-extents, comprising at least one coupling feature for directing light into the waveguide, at least one light redirection feature for redirecting light in an x-y plane within the waveguide, and at least... Cree Inc

Solid state lighting fixtures and image capture systems

An LED-based lighting fixture sets or adjusts a parameter of a drive signal that is used to drive its LEDs to be more compatible with the camera system; the camera system sets or adjusts an image capture parameter to be more compatible with the LED-based lighting fixture, or a combination... Cree Inc

Light fixture control

A fixture configuration module comprises range control circuitry and fixture control circuitry. The range control circuitry is configured to store a range of a lighting parameter. The range identifies at least a subset of values of the lighting parameter supported by the light fixture to produce light. The fixture control... Cree Inc

Light emitting diodes, components and related methods

Light emitting diodes, components, and related methods, with improved performance over existing light emitting diodes. In some embodiments light emitter devices included herein include a submount, a light emitter, a light affecting material, and a wavelength conversion component. Wavelength conversion components provided herein include a transparent substrate having an upper... Cree Inc

Led luminaire

An outdoor luminaire comprises a housing adapted to be mounted on an outdoor structure, an input disposed in the housing that receives AC power, and at least one rectification element coupled to the input and which produces rectified AC electrical power comprising a plurality of cycles. At least one LED... Cree Inc

Solid state light fixtures suitable for high temperature operation having separate blue-shifted-yellow/green and blue-shifted-red emitters

Solid state light fixtures include a plurality of blue-shifted-yellow/green light emitting diode (“LED”) packages and a plurality of blue-shifted-red LED packages, where the solid state light fixture emits light having a correlated color temperature of between 1800 K and 5500 K, a CRI value of between 80 and 99, a... Cree Inc

Master/slave arrangement for lighting fixture modules

The present disclosure relates to a lighting fixture that includes a driver module and at least one other module that provides a lighting fixture function, such as a sensor function, lighting network communication function, gateway function, and the like. The driver module communicates with the other modules in a master/slave... Cree Inc

Light fixture and optic with light-transmissive shield

A light-emitting arrangement including an optical member and a light-transmissive shield member secured with respect to the optical member at least partially defines a light-fixture exterior and having a back side facing a circuit board and receiving a gasket which encircles the circuit board to provide water seal thereabout. The... Cree Inc

Light emitter components and related methods

Light emitter components and related methods are provided. In some aspects, light emitter components and related methods include a ceramic submount having a reflective surface. Light emitter components and related methods can include light emitter chips disposed over the reflective surface. Each light emitter chip can include a sapphire substrate,... Cree Inc

Gallium nitride high-electron mobility transistors with deep implanted p-type layers in silicon carbide substrates for power switching and radio frequency applications and process for making the same

The disclosure is directed to a high-electron mobility transistor that includes a SiC substrate layer, a GaN buffer layer arranged on the SiC substrate layer, and a p-type material layer having a length parallel to a surface of the SiC substrate layer over which the GaN buffer layer is provided.... Cree Inc

Depletion mode semiconductor devices including current dependent resistance

A transistor device is provided. The transistor device includes a substrate, a channel layer on the substrate, the channel layer including a GaN material, a barrier layer that is on the channel layer and that includes an AlGaN material, a drain electrode that is on the barrier layer in a... Cree Inc

Auxiliary supply generation for power converters

A power converter may be configured to power multiple output loads, including a main output load and at least one auxiliary output load. The power converter may include control circuitry that controls power delivery to output circuits coupled to the output loads. When the main output load is operating in... Cree Inc

High reliability ac load switching circuit

A high reliability AC load switching circuit is disclosed. In some embodiments, the AC load switching circuit includes a high-speed switch connected between the load and the voltage source, a cutoff switch connected between the load and the voltage source in parallel with the high-speed switch, and a level detector... Cree Inc

Dimming control for led-based luminaires

A PWM dimmer includes a source terminal, a load terminal, a power stage, an interface, and control circuitry. The power stage is coupled between the source terminal and the load terminal and is configured to receive from the source terminal an AC supply signal and provide a pulsed AC load... Cree Inc

Led lighting device with communications module and antenna

A LED lighting device includes LEDs operable to emit light when powered through an electrical path. The LED lighting device includes a housing and a communications module for wireless communication to and from the LED lighting device. An antenna for receives and transmits a wireless signal where the antenna comprises... Cree Inc

Bonded optical systems and applications thereof

In view of delamination and other failure mechanisms, bonded assemblies are described herein comprising one or more reinforcement members reducing deflection of the assemblies under applied flexural loads, wherein the reinforcement members do not materially interfere with the functionality of the bonded assemblies. In one aspect, waveguide assemblies are provided.... Cree Inc

Wide bandgap field effect transistors with source connected field plates

A field effect transistor comprising a buffer and channel layer formed successively on a substrate. A source electrode, drain electrode, and gate are all formed in electrical contact with the channel layer, with the gate between the source and drain electrodes. A spacer layer is formed on at least a... Cree Inc

Substrate based light emitter devices, components, and related methods

Substrate based light emitter devices, components, and related methods are disclosed. In some aspects, light emitter components can include a substrate and a plurality of light emitter devices provided over the substrate. Each device can include a surface mount device (SMD) adapted to mount over an external substrate or heat... Cree Inc

Super junction power semiconductor devices formed via ion implantation channeling techniques and related methods

Semiconductor devices include a silicon carbide drift region having an upper portion and a lower portion. A first contact is on the upper portion of the drift region and a second contact is on the lower portion of the drift region. The drift region includes a superjunction structure that includes... Cree Inc

Optical waveguide and lamp including same

An optical waveguide includes a body of optically transmissive material having a width substantially greater than an overall thickness thereof and including a first side, a second side opposite the first side, a central bore extending between the first and second sides and adapted to receive a light emitting diode,... Cree Inc

Waveguide-based light sources with dynamic beam shaping

Luminaires are described herein employing waveguides and associated architectures for dynamic alteration of illuminance distribution patterns. In one aspect, a luminaire described herein comprises a waveguide body and light sources having differing angular positions relative to the waveguide body for altering illuminance distribution patterns of the luminaire according to one... Cree Inc

Luminaire with controllable light emission

A luminaire includes a first waveguide having a first primary light emitting surface directed in a first direction and a first secondary light emitting surface directed in a second direction. A second waveguide having a second primary light emitting surface directed in the second direction and a second secondary light... Cree Inc

Solid state lighting apparatus with electrical connectors including portions of driver circuits

A solid state lighting apparatus can include an electrical connector that is configured to releasably couple to a standardized electrical fixture having ac voltage provided thereat, where the electrical connector includes an opening that is configured to provide a recess in the electrical connector including an interior contact to provide... Cree Inc

High voltage monolithic led chip

Monolithic LED chips are disclosed comprising a plurality of active regions on submount, wherein the submount comprises integral electrically conductive interconnect elements in electrical contact with the active regions and electrically connecting at least some of the active regions in series. The submount also comprises an integral insulator element electrically... Cree Inc

High density pixelated led and devices and methods thereof

At least one array of LEDs (e.g., in a flip chip configuration) is supported by a substrate having a light extraction surface overlaid with at least one lumiphoric material. Light segregation elements registered with gaps between LEDs are configured to reduce interaction between emissions of different LEDs and/or lumiphoric material... Cree Inc

High density pixelated led and devices and methods thereof

At least one array of LEDs (e.g., in a flip chip configuration) is supported by a substrate having a light extraction surface overlaid with at least one lumiphoric material. Light segregation elements registered with gaps between LEDs are configured to reduce interaction between emissions of different LEDs and/or lumiphoric material... Cree Inc

High power mmic devices having bypassed gate transistors

Monolithic microwave integrated circuits are provided that include a substrate having a transistor and at least one additional circuit formed thereon. The transistor includes a drain contact extending in a first direction, a source contact extending in the first direction in parallel to the drain contact, a gate finger extending... Cree Inc

Transistor with bypassed gate structure field

A transistor device includes a source contact extending in a first direction, a gate finger extending in the first direction adjacent the source contact, and a drain contact adjacent the gate finger, wherein the gate finger is between the drain contact and the source contact. The device further includes a... Cree Inc

Bypassed gate transistors having improved stability

A transistor includes a plurality of gate fingers that extend in a first direction and are spaced apart from each other in a second direction, each of the gate fingers comprising at least spaced-apart and generally collinear first and second gate finger segments that are electrically connected to each other.... Cree Inc

Wafer level packaging of multiple light emitting diodes (leds) on a single carrier die

An LED wafer includes LED dies on an LED substrate. The LED wafer and a carrier wafer are joined. The LED wafer that is joined to the carrier wafer is shaped. Wavelength conversion material is applied to the LED wafer that is shaped. Singulation is performed to provide multiple LED... Cree Inc

Power module for supporting high current densities

A power module is disclosed that includes a housing with an interior chamber wherein multiple switch modules are mounted within the interior chamber. The switch modules comprise multiple transistors and diodes that are interconnected to facilitate switching power to a load. In one embodiment, at least one of the switch... Cree Inc

Lighting device and making lighting device

A lighting device comprises a solid state light emitter on a circuit board, and an optic held in place relative to the first circuit board, a voltage drop across the emitter at least 60 volts. A lighting device comprises a solid state light emitter on a first circuit board, an... Cree Inc

Led lamp with internal reflector

In a LED lamp having an optically transmissive enclosure and a base connected to the enclosure a plurality of LEDs are operable to emit light when energized through an electrical path from the base. A reflector has an enclosed wall shape and is disposed such that LEDs are mounted inside... Cree Inc

Led luminaire having enhanced thermal management

In one aspect, luminaires are described herein having sensor modules integrated therein. In one aspect, a luminaire described herein comprises a light emitting face including a LED assembly. A sensor module is integrated into the luminaire at a position at least partially overlapping the light emitting face. In another aspect,... Cree Inc

08/10/17 / #20170227208

Led luminaire having enhanced thermal management

In one aspect, luminaires are described herein enabling independent thermal management of driver and LED assemblies. For example, a luminaire comprises a driver assembly vertically integrated with a LED assembly, the driver assembly comprising a driver heatsink having an interior in which a circuit board assembly is positioned, and the... Cree Inc

08/10/17 / #20170228874

Image analysis techniques

A frame is obtained from an image sensor. The frame may include a number of zones, each of which in turn includes a number of pixels. Each one of the pixels may be associated with a pixel value. A pixel change value for each one of the pixels in the... Cree Inc

08/10/17 / #20170229431

Wafer level packaging of light emitting diodes (leds)

An LED wafer includes LED dies on an LED substrate. The LED wafer and a carrier wafer are joined. The LED wafer that is joined to the carrier wafer is shaped. Wavelength conversion material is applied to the LED wafer that is shaped. Singulation is performed to provide LED dies... Cree Inc

08/10/17 / #20170230364

Lighting fixture with enhanced security

A lighting fixture includes a solid-state light source, communications circuitry, a memory, and processing circuitry. The memory stores common security credentials, wherein the common security credentials are pre-installed during a factory calibration process. The processing circuitry is coupled to the solid-state light source, the communications circuitry, and the memory. The... Cree Inc

08/10/17 / #20170231045

Solid state light fixtures having ultra-low dimming capabilities and related driver circuits and methods

A solid state light fixture includes a light emitting diode (LED) load and a driver circuit that selectively provides one of a switched-mode drive current and a linear-mode drive current to the LED load in response to a dimming control signal.... Cree Inc

08/10/17 / #20170231053

Led lighting device with adaptive profiles for controlling power consumption

A lighting device system includes light emitters where a battery powers the light emitters. A battery supplies the power for powering the light emitters and a driver is arranged to selectively power the light emitters to adjust an operating parameter of the at least one light emitter based on the... Cree Inc

08/10/17 / #20170231060

Lighting fixture with improved power management

A lighting fixture includes a solid-state light source, communications circuitry, and control circuitry coupled to the communications circuitry and the solid-state light source. The control circuitry is configured to receive a message from a neighboring device via the communications circuitry, the message indicating the detection of an occupancy event by... Cree Inc

08/10/17 / #20170231061

Modular lighting fixture

A lighting fixture includes a solid-state light source, a fixture common bus, a driver module, and a control module. The fixture common bus is configured to receive at least one functional module and provide an input signal from the at least one functional module to one or more other modules.... Cree Inc

08/10/17 / #20170231066

Automatic mapping of devices in a distributed lighting network

A method includes the steps of obtaining distance measurements between a device and a number of lighting fixtures, processing the distance measurements to assign coordinates to each one of the lighting fixtures, and facilitating registration of the coordinates of a subset of the lighting fixtures to obtain registered coordinates for... Cree Inc

08/03/17 / #20170219762

Optical waveguides

A waveguide body comprises a body of optically transmissive material further comprising an input surface for light to enter the body of optically transmissive material along a light path. The body of optically transmissive material is curved and has an inflection region that extends transverse to the light path.... Cree Inc

07/27/17 / #20170212291

Optical waveguide bodies and luminaires utilizing same

A luminaire comprises an optical element. The optical element comprises a coupling portion that comprises a coupling cavity that extends along a length of the optical element. The coupling cavity is configured to receive at least one light emitting diode. The optical element further comprises first and second sections extending... Cree Inc

07/27/17 / #20170213811

High performance power module

The present disclosure relates to a power module that has a housing with an interior chamber and a plurality of switch modules interconnected to facilitate switching power to a load. Each of the plurality of switch modules comprises at least one transistor and at least one diode mounted within the... Cree Inc

07/20/17 / #20170205567

Luminaires utilizing edge coupling

A luminaire includes at least first and second waveguides. The first waveguide has a first coupling surface extending between a first surface and a second surface opposite the first surface, and the second waveguide has a second coupling surface extending between a third surface and a fourth surface opposite the... Cree Inc

07/06/17 / #20170194298

Illumination devices, and methods of fabricating same

A light emitter, comprising a monolithic n-type layer (comprising at least first and second n-type regions), a monolithic p-type layer (comprising at least first and second p-type regions), at least a first isolation region and at least a first electrically conductive via that extends through at least part of the... Cree Inc

06/29/17 / #20170186913

Formation of nitride-based optoelectronic and electronic device structures on lattice-matched substrates

A method of forming an AlInGaN alloy-based electronic or optoelectronic device structure on a nitride substrate and subsequent removal of the substrate. An AlInGaN alloy-based electronic or optoelectronic device structure formed on a nitride substrate is freed from the substrate on which it was grown.... Cree Inc

06/22/17 / #20170176666

Optical waveguide body

An optical waveguide body includes a first layer of optically transmissive material and a second layer of optically transmissive material in contact with the first layer. At least one of the first and second layers is tapered and the first layer has a first index of refraction and the second... Cree Inc

06/22/17 / #20170179088

Wire bond free wafer level led

A wire-bond free semiconductor device with two electrodes both of which are accessible from the bottom side of the device. The device is fabricated with two electrodes that are electrically connected to the oppositely doped epitaxial layers, each of these electrodes having leads with bottom-side access points. This structure allows... Cree Inc

06/22/17 / #20170179350
06/15/17 / #20170168221

Outdoor and/or enclosed structure led luminaire

A luminaire with a plurality of optical waveguides disposed in side-by-side relationship, together at least partially defining a closed path, and a plurality of optical coupling portions disposed adjacent to the optical waveguides. Further, each optical coupling portion is associated with one of the optical waveguides, and each coupling portion... Cree Inc

06/08/17 / #20170159892

Lighting devices that comprise one or more solid state light emitters

Light engine modules comprise a support member and a solid state light emitter, in which (1) the emitter is mounted on the support member, (2) a region of the support member has a surface with a curved cross-section, (3) the emitter and a compensation circuit are mounted on the support... Cree Inc

06/08/17 / #20170162547

Solid state light fixtures suitable for high temperature operation having separate blue-shifted-yellow/green and blue-shifted-red emitters

Solid state light fixtures include a plurality of blue-shifted-yellow/green light emitting diode (“LED”) packages and a plurality of blue-shifted-red LED packages, where the solid state light fixture emits light having a correlated color temperature of between 1800 K and 5500 K, a CRI value of between 80 and 99, a... Cree Inc

06/01/17 / #20170155026

Light emitting diode (led) components including multiple led dies that are attached to lead frames

A Light Emitting Diode (LED) component includes a lead frame and an LED that is electrically connected to the lead frame without wire bonds, using a solder layer. The lead frame includes a metal anode pad, a metal cathode pad and a plastic cup. The LED die includes LED die... Cree Inc

05/25/17 / #20170150570

Systems and methods for high output, high color quality light

Systems and methods for a high output, high color quality light are disclosed. In some embodiments, such a light may include a light fixture including one or more LEDs configured to output a cumulative light output; wherein the cumulative light output comprises an intensity of greater than or equal to... Cree Inc

05/25/17 / #20170150584

Master/slave arrangement for lighting fixture modules

The present disclosure relates to a lighting fixture that includes a driver module and at least one other module that provides a lighting fixture function, such as a sensor function, lighting network communication function, gateway function, and the like. The driver module communicates with the other modules in a master/slave... Cree Inc

05/11/17 / #20170131452

Waveguide having unidrectional illuminance

A luminaire includes an optical waveguide having a first surface and a second surface opposite the first surface, and a light source associated with the optical waveguide. At least about 80% of light produced by the light source is directed by the waveguide into an illumination distribution emitted from the... Cree Inc

05/04/17 / #20170127491

Ambient light sensor circuit

Ambient light sensor circuitry includes a photodetector, a controllable current source, and control circuitry. The photodetector is coupled between a supply voltage and an intermediate node and configured to provide a photodetector current proportional to an amount of light detected thereby to the intermediate node. The controllable current source is... Cree Inc

05/04/17 / #20170127492

Lighting fixture with image sensor module

A lighting fixture includes a control system, a light source, and an image sensor module. The image sensor module is configured to capture image data and process the image data to provide derived image data, such that the derived image data is downsampled from the image data. The derived image... Cree Inc

04/20/17 / #20170111970

Solid state lighting switches and fixtures providing dimming and color control

A solid state lighting switch can include a first input control that can be configured to adjust a dimming indication or color indication for a solid state lighting fixture that is configured for coupling to the solid state lighting switch. A selective linking mechanism can be configured to activate a... Cree Inc

04/20/17 / #20170112005

High voltage power module

A power module includes a number of sub-modules connected via removable jumpers. The removable jumpers allow the connections between one or more power semiconductor die in the sub-modules to be reconfigured, such that when the removable jumpers are provided, the power module has a first function and when the removable... Cree Inc

04/06/17 / #20170098746

Low optical loss flip chip solid state lighting device

Flip chip LEDs incorporate multi-layer reflectors and light transmissive substrates patterned along an internal surface adjacent to semiconductor layers. A multi-layer reflector may include a metal layer and a dielectric layer containing conductive vias. Portions of a multi-layer reflector may wrap around a LED mesa including an active region, while... Cree Inc

Patent Packs
03/30/17 / #20170092715

Field effect transistor devices with buried well protection regions

A method of forming a transistor device includes providing a drift layer having a first conductivity type, forming a first region in the drift layer, the first region having a second conductivity type that is opposite the first conductivity type, forming a body layer on the drift layer including the... Cree Inc

03/23/17 / #20170082269

Optical components for luminaire

An optical component has an elongate length extending between first and second ends and a width transverse to and substantially smaller than the length and extending between first and second sides. The optical component includes a refractive portion disposed between the first and second sides and extending along the length... Cree Inc

03/23/17 / #20170084700

Methods of forming buried junction devices in silicon carbide using ion implant channeling and silicon carbide devices including buried junctions

A semiconductor device structure according to some embodiments includes a silicon carbide substrate having a first conductivity type, a silicon carbide drift layer having the first conductivity type on the silicon carbide substrate and having an upper surface opposite the silicon carbide substrate, and a buried junction structure in the... Cree Inc

03/16/17 / #20170077254

Ohmic contact structure for group iii nitride semiconductor device having improved surface morphology and well-defined edge features

Embodiments of an ohmic contact structure for a Group III nitride semiconductor device and methods of fabrication thereof are disclosed. In general, the ohmic contact structure has a root-mean-squared (RMS) surface roughness of less than 10 nanometers, and more preferably less than or equal to 7.5 nanometers, and more preferably... Cree Inc

03/16/17 / #20170077833

Dual mode power supply controller with charge balance multipliers and charge balance multiplier circuits

A circuit for generating an output current includes a control signal generating circuit that is configured to generate a control signal. The control signal is a function of a level of an analog input voltage signal, and a level of the output current is a function of a level of... Cree Inc

03/09/17 / #20170069606

Light emitting diodes, components and related methods

Light emitting diode (LED) devices, components and systems are provided. LED devices include a submount with a plurality of LEDs disposed thereon. The LEDs mounted on a submount can be spaced apart at predetermined dimensions to control the gaps between each of the plurality of LEDs. By controlling the gaps... Cree Inc

02/23/17 / #20170053987

Transistor structures having reduced electrical field at the gate oxide and methods for making same

A transistor device having reduced electrical field at the gate oxide interface is disclosed. In one embodiment, the transistor device comprises a gate, a source, and a drain, wherein the gate is at least partially in contact with a gate oxide. The transistor device has a P+ region within a... Cree Inc

02/16/17 / #20170047396

Power semiconductor devices having superjunction structures with implanted sidewalls and methods of fabricating such devices

A semiconductor device has a drift region having an upper surface and a lower surface. A first contact is on the upper surface of the drift region and a second contact is on the lower surface of the drift region. The drift region includes a first semiconductor pillar that has... Cree Inc

02/16/17 / #20170048949

Lighting fixture sensor network

A lighting fixture includes a light source, a housing coupled to the light source, communications circuitry, sensor circuitry, and control circuitry. The housing includes an opening through which light from the light source is provided. The control circuitry includes a memory storing instructions, which, when executed by the control circuitry... Cree Inc

02/16/17 / #20170048950

Lighting fixture sensor network

A lighting fixture includes a light source, a housing coupled to the light source, communications circuitry, and control circuitry. The housing includes an opening through which light from the light source is provided. The control circuitry includes a memory storing instructions, which, when executed by the control circuitry cause the... Cree Inc

02/16/17 / #20170048952

Wireless-enabled lighting fixture

A lighting management system includes communications circuitry, processing circuitry, and a memory. The memory stores instructions, which, when executed by the processing circuitry cause the lighting management system to receive a message from a lighting fixture via the communications circuitry, the message indicating a proximal presence of a detected mobile... Cree Inc

02/09/17 / #20170040890

High speed, efficient sic power module

A power converter module includes a baseplate, a substrate on the baseplate, one or more silicon carbide switching components on the substrate, and a housing over the baseplate, the substrate, and the one or more silicon carbide switching components. The housing has a footprint less than 25 cm2. Including a... Cree Inc

02/02/17 / #20170030529

Small form-factor led lamp with color-controlled dimming

A small form factor LED lighting system provides for color-controlled dimming. Embodiments of the invention use one or more small-footprint LED(s) that can emit light of different correlated color temperatures (CCTs, colors or spectral outputs). The CCT of the fixture or bulb can change when dimmed by disproportionate adjustment of... Cree Inc

02/02/17 / #20170031085

Luminaires utilizing optical waveguide

A lighting device comprises a body of optically transmissive material exhibiting a total internal reflection characteristic, the body further comprising a light input surface for receiving light, a light extraction portion spaced from the light input surface, a light transmission portion disposed between the light input surface and the light... Cree Inc

02/02/17 / #20170033749

Bias circuits and methods for depletion mode semiconductor devices

A Radio Frequency (RF) amplifier includes a depletion mode semiconductor device having a gate, a bias device and an inverting circuit. The depletion mode semiconductor device may be a HEMT and/or a MESFET. The bias device is configured to generate a bias voltage. The inverting circuit is configured to generate... Cree Inc

Patent Packs
01/26/17 / #20170025506

Fabrication of single or multiple gate field plates

A process for fabricating single or multiple gate field plates using consecutive steps of dielectric material deposition/growth, dielectric material etch and metal evaporation on the surface of a field effect transistors. This fabrication process permits a tight control on the field plate operation since dielectric material deposition/growth is typically a... Cree Inc

01/26/17 / #20170027033

Lighting apparatus using multiple led strings with current mirror circuitry and methods of operating same

Lighting apparatus includes a first string of light-emitting diodes (LEDs) having a first terminal coupled to a current source and configured to produce a first correlated color temperature (CCT) and a second string of LEDs having a first terminal coupled to the current source and configured to produce a second... Cree Inc

01/19/17 / #20170016583

Led lamp with high color rendering index

An LED lamp with a high color rendering index (CRI) is disclosed. Example embodiments of the invention provide an LED lamp with a relatively high color rendering index (CRI). In some embodiments, the lamp has other advantageous characteristics, such as good angular uniformity. In some embodiments, the LED lamp is... Cree Inc

01/19/17 / #20170018538

Solid state light emitter devices and methods

Solid state light emitter devices and methods are provided. A solid state light emitter device can include a submount having an upper surface and a bottom surface. At least first pair and a second pair of electrically conductive contacts can be disposed on the bottom surface of the submount. The... Cree Inc

01/12/17 / #20170009957

Linear led lighting system with controlled distribution

A linear LED lighting system, assembly and/or fixture distributes luminance efficiently in certain applications, such as for ceiling lighting used in certain retail environments. According to example embodiments of the invention, a linear LED lighting system includes at least two tilted, parabolic reflecting surfaces and a linear array of LED... Cree Inc

01/12/17 / #20170012106

Method of forming vias in silicon carbide and resulting devices and circuits

A method of fabricating an integrated circuit on a silicon carbide substrate is disclosed that eliminates wire bonding that can otherwise cause undesired inductance. The method includes fabricating a semiconductor device including a Group III-V semiconductor layer on a surface on a silicon carbide substrate, wherein the semiconductor device defines... Cree Inc

01/12/17 / #20170012177

Led based lighting system

An LED lamp includes a base connected to an optically transmissive enclosure. An LED assembly for emitting light when energized through an electrical path is in the enclosure. The LED assembly comprises a LED array in a tube and a fill material filling the tube. An optic element comprising at... Cree Inc

01/05/17 / #20170005241

Stabilized quantum dot structure and making a stabilized quantum dot structure

A stabilized quantum dot structure for use in a light emitting diode (LED) comprises, according to one embodiment, a luminescent particle comprising one or more semiconductors, a buffer layer overlying the luminescent particle, where the buffer layer comprises an amorphous material, and a barrier layer overlying the buffer layer, where... Cree Inc

01/05/17 / #20170006673

Control circuit for modulating an analog dimming command signal

According to one aspect, a control system for an LED luminaire includes a dimming control circuit that develops an analog dimming command signal that is variable between zero volts and ten volts to command LED brightness. The control system further includes a modulation circuit coupled to the dimming control circuit.... Cree Inc








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