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US 8,138,690 B2Granted
LED-based lighting methods, apparatus, and systems employing LED light bars, occupancy sensing, local state machine, and meter circuit
AssigneeDigital Lumens Incorporated
InventorsBrian J. Chemel, Colin Piepgras, Steve T. Kondo, Scott D. Johnston
Life of this patent
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Abstract
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.
Claims20
A lighting fixture to provide variable occupancy-based lighting, the lighting fixture comprising:
- a housing;
- at least one occupancy sensor, disposed in or coupled to the housing, to provide occupancy information;
- a plurality of light emitting diode (LED) light bars disposed in the housing to provide the variable occupancy-based lighting at a plurality of light levels;
- a power management module (PMM), disposed in the housing and operatively coupled to the at least one occupancy sensor and the plurality of LED light bars, to adjust the variable occupancy-based lighting based at least in part on the occupancy information provided by the at least one occupancy sensor, the power management module including:
- a memory to store lighting parameters, wherein the lighting parameters include at least an active power output level of the plurality of light levels and an inactive power output level of the plurality of light levels;
- and
- a digital light agent controller to implement a state machine to analyze the occupancy information and control the plurality of LED light bars based on the lighting parameters in the memory so as to provide the variable occupancy-based lighting at the active power output level of the plurality of light levels or the inactive power output level of the plurality of light levels;
- and
- a meter circuit, operatively coupled to the digital light agent controller and the plurality of LED light bars, to determine an energy usage by the plurality of LED light bars.
6 more elements
A lighting method to provide variable occupancy-based lighting in an environment, the lighting method comprising:
- A) sensing an occupancy in the environment to provide occupancy information;
- B) controlling a plurality of LED light bars to provide the variable occupancy-based lighting at a plurality of light levels, based at least in part on the occupancy information and/or lighting parameters, wherein the lighting parameters include at least an active power output level of the plurality of light levels and an inactive power output level of the plurality of light levels;
- C) determining an energy usage by the plurality of LED light bars;
- and
- D) transmitting to at least one external device power measurements representing the energy usage determined in C).
2 more elements
A lighting fixture to provide variable occupancy-based warehouse and industrial lighting, the lighting fixture comprising:
- A) a housing formed as a rectangular frame and including an integral sensor bay;
- B) at least one occupancy sensor, disposed in the integral sensor bay, to provide occupancy information;
- C) a plurality of rotatable light emitting diode (LED) light bars disposed in the housing to provide the variable occupancy-based warehouse and industrial lighting at a plurality of light levels and a plurality of foot-candle patterns, each LED light bar being arranged to rotate in the frame around a corresponding rotational axis to obtain a specific direction of light;
- D) a power management module (PMM), disposed in the housing and operatively coupled to the at least one occupancy sensor and the plurality of rotatable LED light bars to adjust the variable occupancy-based warehouse and industrial lighting based at least in part on the occupancy information provided by the at least one occupancy sensor, the power management module including:
- D1) a memory to store lighting parameters, wherein the lighting parameters include at least an active power output level of the plurality of light levels and an inactive power output level of the plurality of light levels;
- and
- D2) a digital light agent controller to implement a state machine to analyze the occupancy information and control the plurality of rotatable LED light bars based on the lighting parameters in the memory and the analyzed occupancy information so as to provide the variable occupancy-based warehouse and industrial lighting at the active power output level of the plurality of light levels or the inactive power output level of the plurality of light levels;
- E) a meter circuit, operatively coupled to the power management module and the plurality of LED light bars, to determine an energy usage by the plurality of LED light bars, wherein the power management module logs in the memory power measurements representing the energy usage determined by the meter circuit;
- and
- F) a network interface, operatively coupled to at least the power management module, to transmit to at least one external device the power measurements representing the energy usage determined by the meter circuit.
7 more elements
Dependencies are inferred from the claim text.