Cree Gmbh

Ideal Industries Lighting LLC

P Joseph DeSena, Jr

Mark Penley Boomgaarden

Michael John Bergmann

Andrew Dummer

Randall Levy Bernard

Daniel J Pope

James McBryde

Florin A Tudorica

Heidi Dieringer Loepp

Jen Huang

Randy Demuynck

Steve Reich

Philip Scott

Priyanka S Medida

LED troffer fixture

A single solid state luminaire product is field-configurable to a plurality of discrete coordinated color temperature (CCT) and/or maximum luminosity settings. A field-actuated control circuit may control a current ratio control circuit, which directs drive current from a power supply to selected ones, or in selected ratios to multiple ones, of heterogeneous LED strings. Additionally or alternatively the control circuit may control the power supply, to select an overall maximum level of drive current, which determines the maximum luminosity of the luminaire. Inputs for CCT and/or maximum luminosity are input to the field-actuated control circuit prior to the luminaire being removed from its product packaging. Embodiments allow a distributor to order and stock a large inventory of substantially identical luminaires from the manufacturer, yet still offer customers a variety of different CCT and/or maximum luminosity products.

Solid state luminaire with field-configurable CCT and/or luminosity

Solid state lighting devices are configured to provide aggregate emissions that include emissions from solid state light emitters and emissions that are received by preferential reflector structures. Preferential reflectors have non-uniform spectral reflectivities that preferentially reflect certain wavelengths of emissions that are received from solid state light emitters. Solid state lighting devices include solid state light emitters of different correlated color temperature (CCT) values and one or more preferential reflectors configured to shift CCT values of aggregate emissions of such solid state lighting devices, such as to provide tunable aggregate emissions between multiple CCT values along or near a black body locus.

Reflector structures for lighting devices

A single solid state luminaire product is field-configurable to a plurality of discrete coordinated color temperature (CCT) and maximum luminosity settings. A field-actuated control circuit controls a current ratio control circuit, which directs drive current from a power supply to selected ones, or in selected ratios to multiple ones, of heterogeneous LED strings. The control circuit may also control the power supply, to select an overall maximum level of drive current, which determines the maximum luminosity of the luminaire. In one embodiment, inputs to the field-actuated control circuit are input from exterior to the luminaire product packaging. Embodiments allow a distributor to order and stock a large inventory of substantially identical luminaires from the manufacturer, yet still offer customers a variety of different CCT and maximum luminosity products.

The present disclosure relates to a lighting fixture that is capable of providing white light over an extended range of correlated color temperatures.

Lighting fixture providing variable CCT

An LED lamp includes a LED assembly comprising at least one LED operable to emit light when energized through an electrical path. A heat sink structure is thermally coupled to the LED assembly for dissipating heat to the ambient environment. An aromatic structure is thermally coupled to the heat sink structure such that the aromatic structure is heated by the heat dissipated from the heat sink.

LED lamp with aromatic structure

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 CRI R9 value of between 15 and 75, and a Qg value of between 90 and 110 when the blue-shifted-yellow/green LED packages and the blue-shifted-red LED packages are operating at steady-state operating temperatures of at least 80&#xb0; C.

Growing community of inventors

Raleigh, NC, United States of America

P Joseph DeSena, Jr