Lighting control system with emergency mode

Patent metadata

Field	Value
Publication number	US-12490350-B2
Application number	US-202318361127-A
Country	US
Kind code	B2
Filing date	Jul 28, 2023
Priority date	Feb 17, 2018
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A load control system has a system controller and a plurality of load control devices which receive power from a power source. The load control system also includes at least one emergency load control device which receives power from a backup power source in the event of a power failure of the power source. The emergency load control device is configured to enter an emergency mode during the power failure of the power source, wherein in the emergency mode, the emergency load control device controls respective electrical loads according to emergency mode preset settings, and the emergency load control device transmits a message to the system controller to indicate the emergency load control device is in the emergency mode. The system controller is configured to transmit a message to the emergency load control device to exit the emergency mode when power from the power source is restored.

First claim

What is claimed is:

1 . An electric lighting load control device comprising:
control circuitry to:
receive a first input indicative of a switchover from a primary power supply to a backup power supply and responsive to receipt of the first input:
transition from a NORMAL operating mode to an EMERGENCY operating mode;
cause an operatively coupled electric lighting load to operate in an EMERGENCY operating state; and
periodically broadcast a message indicative of transition to the EMERGENCY operating mode; and
receive a second input indicative of a switchover from the backup power supply to the primary power supply and responsive to receipt of a second input:
cease the periodic broadcast of the message indicative of transition to the EMERGENCY operating mode; and
cause the operatively coupled electric lighting load device to operate in a NORMAL operating state.

2 . The electric lighting load control device of claim 1 wherein to receive the first input, the control circuitry to further:
receive the first input responsive to a first power blip caused by the switchover from the primary power supply to the backup power supply.

3 . The electric lighting load control device of claim 2 wherein to receive the second input, the control circuitry to further:
receive the second input responsive to a second power blip caused by the switchover from the backup power supply to the primary power supply.

4 . The electric lighting load control device of claim 1 wherein to receive the first input, the control circuitry to further:
receive a signal from a power monitor operatively coupled to the primary power supply.

5 . The electric lighting load control device of claim 4 wherein to receive the signal from the power monitor operatively coupled to the primary power supply, the control circuitry to further:
receive a phase failure signal from a multi-phase power monitor operatively coupled to the primary power supply, the phase failure signal responsive to the failure of at least one of the primary power supply phases.

6 . The electric lighting load control device of claim 1 wherein to cause the operatively coupled electric lighting load to operate in the EMERGENCY operating state, the control circuitry to further:
adjust at least one of: an output intensity of the lighting load or an output color temperature of the lighting load to a level associated with the EMERGENCY operating state.

7 . The electric lighting load control device of claim 1 wherein to receive the second input, the control circuitry to further:
receive a reset signal from a system controller communicatively coupled to the electric lighting load control device.

8 . The electric lighting load control device of claim 1 , the control circuitry to further:
cause a storage in communicatively coupled memory circuitry of one or more current operating parameters of the operatively coupled electric lighting load prior to causing the operatively coupled electric lighting load to operate in the EMERGENCY operating state.

9 . The electric lighting load control device of claim 8 , wherein to cause the operatively coupled electric lighting load device to operate in a NORMAL operating state, the control circuitry to further:
retrieve the one or more current operating parameters from the communicatively coupled memory circuitry; and cause the operatively coupled electric lighting load to operate using the one or more retrieved current operating parameters.

10 . An electric lighting load control method, comprising:
receiving, by electric lighting load control circuitry, a first input indicative of a switchover from a primary power supply to a backup power supply and responsive to receipt of the first input: transitioning, by the electric lighting load control circuitry, from a NORMAL operating mode to an EMERGENCY operating mode; causing, by the electric lighting load control circuitry, an operatively coupled electric lighting load to operate in an EMERGENCY operating state; and periodically broadcasting, by the electric lighting load control circuitry, a message indicative of transition to the EMERGENCY operating mode; and receiving, by the electric lighting load control circuitry, a second input indicative of a switchover from the backup power supply to the primary power supply and responsive to receipt of a second input: ceasing, by the electric lighting load control circuitry, the periodic broadcast of the message indicative of transition to the EMERGENCY operating mode; and causing, by the electric lighting load control circuitry, the operatively coupled electric lighting load device to operate in a NORMAL operating state.

11 . The method of claim 10 wherein to receiving the first input further comprises:
receiving, by the electric lighting load control circuitry, a power failure input responsive to a first power blip caused by the switchover from the primary power supply to the backup power supply.

12 . The method of claim 11 wherein receiving the second input further comprises:
receiving, by the electric lighting load control circuitry, a power restoration input responsive to a second power blip caused by a switchover from the backup power supply to the primary power supply.

13 . The method of claim 10 wherein receiving the first input further comprises:
receiving, by the electric lighting load control circuitry, a signal from a power monitor operatively coupled to the primary power supply.

14 . The method of claim 13 wherein receiving the signal from the power monitor operatively coupled to the primary power supply, further comprises:
receiving, by the electric lighting load control circuitry, a phase failure signal from a multi-phase power monitor operatively coupled to the primary power supply, the phase failure signal responsive to the failure of at least one of the primary power supply phases.

15 . The method of claim 10 wherein causing the operatively coupled electric lighting load to operate in the EMERGENCY operating state, further comprises:
adjusting, by the electric lighting load control circuitry to a level associated with the EMERGENCY operating state, at least one of: an output intensity of the lighting load or an output color temperature of the lighting load.

16 . The method of claim 10 wherein receiving the second input further comprises:
receiving, by the electric lighting load control circuitry, a reset signal from a system controller communicatively coupled to the electric lighting load control device.

17 . The method of claim 10 , further comprising:
causing, by the electric lighting load control circuitry, a storage in communicatively coupled memory circuitry of one or more current operating parameters of the operatively coupled electric lighting load prior to causing the operatively coupled electric lighting load to operate in the EMERGENCY operating state.

18 . The method of claim 17 , wherein causing the operatively coupled electric lighting load device to operate in a NORMAL operating state, further comprises:
retrieving, by the electric lighting load control circuitry, the one or more current operating parameters from the communicatively coupled memory circuitry; and causing, by the electric lighting load control circuitry, the operatively coupled electric lighting load to operate using the one or more retrieved current operating parameters.

19 . A non-transitory, machine-readable, storage device that includes instructions that, when executed by electric lighting load contr

Assignees

• Lutron Tech Co Llc

Inventors

• Dolan David J
• Burlew Jackson
• Sreekumar Aditya
• Rohm Andrew G

Classifications

• H05B47/196

  characterised by user interface arrangements · CPC title

• H05B47/199

  Commissioning of light sources · CPC title

• H05B47/172

  Emergency operational modes · CPC title

• H05B47/155

  Coordinated control of two or more light sources · CPC title

• H05B45/3725

  Switched mode power supply [SMPS] · CPC title