Digital Lumens, Inc.

Koninklijke Philips Corporation N.v.

Osram Sylvania Inc.

Digtial Lumens Incorporated

Scott D Johnston

Colin N Piepgras

Brian J Chemel

Steve T Kondo

Frederick Marshall Morgan

John Francis Egan

Christopher L Elledge

Matthew William Massicotte

Jesse F Kuhn

Henry B Sick

Michael Blackwell

Hugh Medal

Matthew W Massicotte

Michael Keenan Blackwell

In embodiments of the present invention, a method and system is provided for commissioning improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more LED light bars, integrated sensors, onboard intelligence to send and receive signals and control the LED light bars, and network connectivity to other fixtures.

Lighting fixtures and methods of commissioning lighting fixtures

Lighting fixtures and methods of commissioning light fixtures

In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.

Sensor-based lighting methods, apparatus, and systems

Lighting fixtures and methods for automated operation of lighting fixtures via a wireless network having a mesh network topology

An ambient light sensor measures an ambient light level at one point in an illuminated environment, such as a warehouse, office, shop, cold-storage facility, or industrial facility, and provides an indication of the measured ambient light level to a processor. The processor maps the measured ambient light level to an estimated ambient light level at a different point in the illuminated environment from the measured ambient light level (e.g., a 'task height' about three feet from a warehouse floor). The processor may determine the difference between the estimated ambient light level and a desired light level at the task height, and may change the artificial illumination provided by a light fixture to make the actual ambient light level at task height match the desired light level at the task height.

Methods, systems, and apparatus for intelligent lighting

Light-emitting diodes (LEDs) generate light more efficiently than high-intensity discharge lamps or high-intensity fluorescent lamps. Driving a series of LEDs with a constant-voltage primary supply and a low-voltage LED driver keeps efficiency high. Unfortunately, LED forward voltage varies as a function of temperature: at low temperature, the forward voltage rises. Placing the LEDs in series magnifies the forward voltage increases. This makes it difficult to drive a series of LEDs at low temperature with a constant-voltage supply because the forward voltage can exceed the power supply voltage. To account for this behavior, an exemplary LED lighting fixture includes a 'bypass' circuit that, when engaged, effectively removes at least one LED from each series string of LEDs to bring the total forward voltage below the power supply voltage. The low-voltage driver circuit monitors temperature, and engages the 'bypass' circuit when necessary to ensure that DC voltage is not exceeded.

Methods, apparatuses, and systems for operating light emitting diodes at low temperature

Lighting fixtures and methods via a wireless network having a mesh network topology

An AC line voltage may be encoded with control information, such as dimming information derived from an output signal of a conventional dimmer, so as to provide an encoded AC power signal. One or more lighting units, including LED-based lighting units, may be both provided with operating power and controlled (e.g., dimmed) based on the encoded power signal. In one implementation, information may be encoded on the AC line voltage by inverting some half cycles of the AC line voltage to generate an encoded AC power signal, with the ratio of positive half-cycles to negative half-cycles representing the encoded information. In other aspects, the encoded information may relate to one or more parameters of the light generated by the LED-based lighting unit(s) (e.g., intensity, color, color temperature, etc.).

Methods and apparatus for encoding information on an A.C. line voltage

Power management unit with multi-input arbitration

Methods, apparatus, and systems for automatic power adjustment based on energy demand information

LED lighting methods, apparatus, and systems including rules-based sensor data logging

Methods, systems, and apparatus for mapping a network of lighting fixtures with light module identification

Growing community of inventors

Boston, MA, United States of America

Scott D Johnston