Integrated exit signs and monitoring system

• US 8,786,189 B2
• Filed: 11/18/2011
• Issued: 07/22/2014
• Est. Priority Date: 11/18/2010
• Status: Active Grant

• Current Assignee: Limelite Technologies, LLC
• Original Assignee: Limelite Technologies Incorporated
• Inventors: Mayfield, Jerrold W., Kasee, George, Foringer, Jason, Kim, Sameul
• Primary Examiner(s): LE, DON P
• Application Number:
  US13/299,588
• Publication Number:
  US 20120126700A1
• Time in Patent Office: 977 Days
• Field of Search: 315/76, 315/86, 315/130, 315/307, 315/312
• US Class Current: 315/76
• CPC Class Codes: G08B 19/005 combined burglary and fire alarm systems
• CPC Class Codes: G08B 7/062 indicating emergency exits
• CPC Class Codes: H05B 47/105 in response to determined parameters
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A monitoring system has integrated exit signs, which preferably have electroluminescent elements. The signs connect to internal wiring of a building, but local power sources can provide emergency power if building power is lost. Controllers on the signs communicate with a central workstation using building wiring and/or wireless communication. The controllers have one or more automated features for monitoring operation of the exit signs and the surrounding environment. These automated components, including an intensity sensor, an ambient light sensor, a temperature sensor, a smoke detector, a camera, a speaker, a microphone, a motion detector, an RFID detector, and the like. Because the signs are widely distributed throughout the building, operators can get detailed information of the building environment, security, fire, smoke, temperature, etc. The exit signs can store this information locally and can communicate useful information using a communication link to the central workstation.

Claims

1. An illuminated safety device for a facility coupled to a power source, the device comprising:

a light source powered by the power source and having a luminescent panel emitting light;

at least one sensor disposed adjacent the luminescent panel and detecting emitted intensity thereof; and

control circuitry operatively coupled to the light source, the at least one sensor, and the power source, the control circuitry monitoring the emitted intensity detected by the at least one sensor and adjusting the power to the luminescent panel to control the emitted intensity.

2. The device of claim 1, wherein to adjust the power to the luminescent panel to control the emitted intensity, the control circuitry comprises power circuitry adjusting a frequency of a waveform used to power the luminescent panel of the light source.

3. The device of claim 1, further comprising an ambient light sensor detecting an ambient intensity of ambient light, and wherein to control the emitted intensity, the control circuitry increases or decreases the emitted intensity of the light source relative to an increase or decrease in the ambient intensity.

4. The device of claim 1, wherein to adjust the power to the luminescent panel, the control circuitry maintains the emitted intensity at least at a threshold intensity.

5. The device of claim 1, further comprising a temperature sensor obtaining ambient temperature readings, and wherein the control circuitry increases or decreases the emitted intensity of the light source when the ambient temperature reading exceeds a threshold.

6. The device of claim 1, further comprising a motion sensor detecting motion in the vicinity of the device, and wherein the control circuitry increases or decreases the emitted intensity of the light source in response to the detected motion.

7. The device of claim 1, further comprising a smoke detector detecting a presence of smoke, and wherein the control circuitry increases or decreases the emitted intensity of the light source in response to the detected presence of smoke.

8. The device of claim 1, further comprising a radio frequency identification device detecting a presence of a radio frequency identification tag in the vicinity of the device, and wherein the control circuitry increases the emitted intensity of the light source in response to the detected presence of the tag.

9. The device of claim 1, wherein the light source is selected from the group consisting of an electroluminescent element, an electroluminescent panel, a light emitting capacitor (LEC), an organic light emitting diode (OLED), and a polymer light emitting diode (PLED).

10. The device of claim 1, wherein the control circuitry comprises one or more of:

a camera for surveillance, a radio frequency identification device, a wireless networking device, a fire detector, a climate control device, an entry/exit control device, a smoke detector, a speaker, and a microphone.

11. The device of claim 1, further comprising at least one ambient sensor measuring at least one property of ambient conditions, the at least one property comprising one or more of:

a presence of smoke, an ambient light level, a motion threshold, a vibration level, and an ambient temperature.

12. The device of claim 1, wherein to detect the emitted intensity of the light source, the at least one sensor at least measures a luminance level of the light source.

13. The device of claim 1, wherein the control circuitry comprises:

a programmable control device;

memory operatively coupled to the programmable control device and storing executable data and detected data; and

a communication device coupled to the programmable control device and communicating with a network.

14. The device of claim 1, further comprising a backup power supply, the control circuitry operatively coupled to the backup power supply and switching from the power source to the backup power supply in response to a power failure of the power source.

15. The device of claim 1, wherein to adjust the emitted intensity of the light from the light source, the control circuitry is configured to adjust the emitted intensity based on (i) a change in ambient light conditions, (ii) a presence of smoke, (iii) an ambient temperature indicative of a fire, or (iv) a vibration level indicative of a disturbance.

16. The device of claim 1, wherein to control the emitted intensity of the light from the luminescent panel of the light source, the control circuitry is configured to adjust the power to the luminescent panel based on (a) a power outage, (b) a level of luminance extending a lifespan of the light source, or (c) a level of luminance minimizing power consumption.

17. The device of claim 1, wherein the illuminated safety device is an exit sign.

18. The device of claim 1, wherein the control circuitry monitors a condition associated with the device.

19. The device of claim 18, further comprising communication circuitry operatively coupled to the control circuitry and communicating the monitored condition from the control circuitry.

20. The device of claim 19, wherein the communication circuitry communicates the monitored condition wirelessly.

21. The device of claim 18, further comprising memory operatively coupled to the control circuitry and storing the monitored condition of the control circuitry.

22. An illuminated safety device for a facility, the device comprising:

a light source having a luminescent panel emitting light;

at least one sensor disposed adjacent the luminescent panel and detecting emitted intensity thereof; and

communication circuitry communicating with a network; and

control circuitry operatively coupled to the light source, the at least one sensor, and the communication circuitry, the control circuitry monitoring the emitted intensity detected by the at least one sensor and communicating the emitted intensity via the network with the communication circuitry.

23. A facility monitoring system, comprising:

a plurality of illuminated safety devices distributed throughout the facility, each device having a light source and at least one sensor, the light source having a luminescent panel emitting light, the at least one sensor disposed adjacent the luminescent panel and detecting emitted intensity thereof, each device communicating data related to the emitted intensity via a communication link; and

a control unit in communication with the plurality of devices via the communication link and receiving the communicated data related to the emitted intensity.

24. A facility safety method, comprising:

supplying power to a luminescent panel of an illuminated safety device in the facility;

emitting light with the luminescent panel of the device;

measuring emitted intensity of the luminescent panel with at least one sensor of the device; and

controlling the emitted intensity of the luminescent panel by adjusting the power to the luminescent panel of the device based on the measured intensity.