Light and light sensor

• US 9,398,661 B2
• Filed: 08/27/2015
• Issued: 07/19/2016
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Scapa, James R., Simon, David L., Ivey, John
• Primary Examiner(s): Tran, Thuy Vinh
• Assistant Examiner(s): COOPER, JONATHAN G
• Application Number:
  US14/837,251
• Publication Number:
  US 20150366021A1
• Time in Patent Office: 327 Days
• Field of Search: 315119-159
• US Class Current: 1/1
• CPC Class Codes: F21K 9/272 Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts F21K9/278 takes precedence
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21S 8/031 the device consisting essentially only of a light source holder with an exposed light source, e.g. a fluorescent tube
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 23/005 the substrate is supporting also the light source
• CPC Class Codes: F21V 23/0457 the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G01J 1/32 adapted for automatic variation of the measured or reference value regulation of light intensity G05D25/00
• CPC Class Codes: G01J 2001/4252 for testing LED's
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 45/357 specially adapted for retrofit LED light sources
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

An LED-based light includes one or more LEDs, a sensor arranged to detect a brightness level in an area resulting from the combination of light emitted by the LEDs with light from at least one ambient light source other than the LEDs, and operable to output a signal corresponding to the detected brightness level, a controller operable to regulate an amount of power provided to the LEDs in response to the signal, a light transmitting housing for the LEDs, the sensor and the controller and a connector shaped for connection with a light socket disposed at an end of the housing.

Claims

1. An LED-based light, comprising:

one or more LEDs;

a sensor arranged to detect a brightness level in an area resulting from the combination of light emitted by the one or more LEDs with light from at least one ambient light source other than the one or more LEDs, and operable to output a signal corresponding to the detected brightness level;

a controller operable to regulate an amount of power provided to the one or more LEDs in response to the signal and to estimate an efficiency of the one or more LEDs;

a light transmitting housing for the one or more LEDs, the sensor and the controller;

a connector shaped for connection with a light socket disposed at an end of the light transmitting housing; and

a transmitter operable to transmit the estimated efficiency of the one or more LEDs from the controller.

2. The LED-based light of claim 1, wherein the controller is operable to:

compare the signal to a predetermined value corresponding to a desired brightness level, and

increase an amount of power provided to the one or more LEDs in response to the signal if the comparison shows that the brightness level is less than the desired brightness level to adjust the light produced by the one or more LEDs to achieve the desired brightness level.

3. The LED-based light of claim 1, wherein the controller is operable to:

compare the signal to a predetermined value corresponding to a desired brightness level, and

decrease an amount of power provided to the one or more LEDs in response to the signal if the comparison shows that the brightness level is more than the desired brightness level to adjust the light produced by the one or more LEDs to achieve the desired brightness level.

4. The LED-based light of claim 1, wherein the controller is operable to estimate the efficiency of the one or more LEDs at least partially based on a brightness level detected by the sensor while the one or more LEDs are operational.

5. The LED-based light of claim 1, wherein the controller is operable to estimate the efficiency of the one or more LEDs at least partially based on a comparison of a brightness level detected by the sensor while the one or more LEDs are operational with a reference brightness level.

6. The LED-based light of claim 1, wherein the controller is operable to estimate the efficiency of the one or more LEDs at least partially based on a comparison of a brightness level detected by the sensor while the one or more LEDs are operational with a power consumption of the one or more LEDs.

7. The LED-based light of claim 1, wherein the controller is operable to estimate the efficiency of the one or more LEDs, and to activate an alarm when the estimated efficiency of the one or more LEDs is below a predetermined amount.

8. The LED-based light of claim 7, wherein the alarm includes at least one of an LED that produces colored light, the estimated efficiency of the one or more LEDs on a display, and an LED operated in a flashing pattern.

9. The LED-based light of claim 1, wherein the transmitter is operable to transmit the brightness level detected by the sensor.

10. The LED-based light of claim 1, wherein the light transmitting housing is an elongate housing, and the connector is one of a pair of bi-pin connectors disposed at opposing ends of the light transmitting housing.

11. A system for estimating an efficiency of one or more LEDs in an LED-based light, comprising:

an LED-based light including;

one or more LEDs;

a sensor arranged to detect a brightness level in an area resulting from the light emitted by the one or more LEDs, and operable to output a signal corresponding to the detected brightness level;

a light transmitting housing for the one or more LEDs and the sensor; and

a connector shaped for connection with a light socket disposed at an end of the housing; and

a controller operable to estimate the efficiency of the one or more LEDs at least partially based on a comparison of a brightness level detected by the sensor while the one or more LEDs are operational with a power consumption of the one or more LEDs.

12. The system of claim 11, wherein the controller is operable to activate an alarm when the estimated efficiency of the one or more LEDs is below a predetermined amount.

13. The system of claim 12, wherein the alarm includes at least one of operating an LED in the LED-based light that produces colored light, displaying the estimated efficiency of the one or more LEDs on a display, and operating an LED in the LED-based light in a flashing pattern.

14. The system of claim 11, wherein the controller is housed by the light transmitting housing.

15. The system of claim 11, wherein the light transmitting housing is an elongate housing, and the connector is one of a pair of bi-pin connectors disposed at opposing ends of the light transmitting housing.

16. The system of claim 11, further comprising:

another LED-based light including;

one or more second LEDs;

a second sensor arranged to detect a second brightness level in a second area resulting from the light emitted by the one or more second LEDs, and operable to output a second signal corresponding to the second detected brightness level;

a second light transmitting housing for the one or more second LEDs and the second sensor; and

a second connector shaped for connection with a second light socket disposed at an end of the second housing, wherein;

the controller is operable to estimate an efficiency of the system at least partially based on a comparison of brightness levels detected by the sensors of the LED-based light and the other LED-based light while their one or more LEDs are operational with a power consumption of the their one or more LEDs.

17. An LED-based light, comprising:

one or more LEDs;

a sensor arranged to detect a brightness level in an area resulting from the light emitted by the one or more LEDs, and operable to output a signal corresponding to the detected brightness level;

a controller operable to estimate an efficiency of the one or more LEDs at least partially based on the brightness level detected by the sensor while the one or more LEDs are operational;

a transmitter operable to transmit the estimated efficiency of the one or more LEDs;

a light transmitting housing for the one or more LEDs, the sensor, the controller and the transmitter; and

a connector shaped for connection with a light socket disposed at an end of the light transmitting housing.

18. The LED-based light of claim 17, wherein the controller is operable to estimate the efficiency of the one or more LEDs at least partially based on a comparison of a brightness level detected by the sensor while the one or more LEDs are operational with a power consumption of the one or more LEDs.

19. The LED-based light of claim 17, wherein the light transmitting housing is an elongate housing, and the connector is one of a pair of bi-pin connectors disposed at opposing ends of the housing.