Method and system of controlling media devices configured to output signals to surrounding area

• US 8,090,453 B1
• Filed: 12/01/2009
• Issued: 01/03/2012
• Est. Priority Date: 08/23/2005
• Status: Active Grant

• Current Assignee: Ronald Paul Harwood
• Original Assignee: Ronald Paul Harwood
• Inventors: Harwood, Ronald Paul
• Primary Examiner(s): Patel, Ramesh
• Assistant Examiner(s): Stevens, Thomas
• Application Number:
  US12/628,746
• Time in Patent Office: 763 Days
• Field of Search: 700/19, 315/291
• US Class Current: 700/19
• CPC Class Codes: H04R 1/028 associated with devices performing functions other than acoustics, e.g. electric candles
• CPC Class Codes: H04R 2227/003 Digital PA systems using, e.g. LAN or internet
• CPC Class Codes: H04R 27/00 Public address systems circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; monitoring or testing arrangements for public address systems H04R29/007; amplifiers H03F
• CPC Class Codes: H05B 45/18 using temperature feedback

Abstract

A system of controlling media devices configured for outputting signals to a surrounding area. The system including a control strategy for controlling operation of the media devices to execute operations according to a common schedule and a communications strategy for use in communicating the control strategy between the media devices in such a manner as to facilitate distribution of the control strategy to the media devices desired to operate according to the common timeline.

Claims

1. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours; and

wherein the control system adjusts the estimated amount of current by decreasing the estimated amount of current for each LED where the average temperature is less than a predefined threshold.

2. The system of claim 1 further comprising the control system decreasing the estimated amount of current for each LED in proportion to a difference between the average temperature and the predefine threshold.

3. The system of claim 1 wherein the control system adjusts the estimated amount of current by increasing the estimated amount of current for each LED where the average temperature is greater than a predefined threshold.

4. The system of claim 3 further comprising the control system increasing the estimated amount of current for each LED in proportion to a difference between the average temperature and the predefine threshold.

5. The system of claim 1 wherein the desired illumination pattern for the area specifies a uniform amount of light distribution throughout the area such that light output from each LED must be approximately the same.

8. The system of claim 1 wherein the plurality of LEDs are included in geographically space apart luminaires, each luminaire including a housing within which the LEDs are positioned to direct light outwardly toward the area.

6. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours; and

wherein at least a first portion of the plurality of LEDs are provided with a first amount of current and at least a second portion of the plurality of LEDs are provided with a second, different amount of current in order to provide the uniform amount of light distribution throughout the area.

7. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours; and

wherein the desired illumination pattern specifies varying an intensity of the uniform amount of light distribution depending on a time of day and a time of year.

9. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours;

wherein the plurality of LEDs are included in geographically space apart luminaires, each luminaire including a housing within which the LEDs are positioned to direct light outwardly toward the area; and

wherein the average temperature is based on temperature within the housing.

10. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours;

wherein the plurality of LEDs are included in geographically space apart luminaires, each luminaire including a housing within which the LEDs are positioned to direct light outwardly toward the area; and

wherein the average temperature is based on temperature outside the housing within an ambient area around the luminaire.

11. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours;

wherein the plurality of LEDs are included in geographically space apart luminaires, each luminaire including a housing within which the LEDs are positioned to direct light outwardly toward the area; and

wherein the average temperature is based on temperature at a junction of each LED.

12. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours;

wherein the plurality of LEDs are included in geographically space apart luminaires, each luminaire including a housing within which the LEDs are positioned to direct light outwardly toward the area; and

wherein the power system includes a driver within each luminaire to control the current provided to each LED within the same luminaire.

13. The system of claim 12 wherein the control system includes a controller within each luminaire to control the driver within the same luminaire.

14. The system of claim 13 wherein one of the controllers is a master controller that determines the amount of current to be provided to each LED, wherein the master controller wirelessly communicates the determined amount of current to each of the controllers.

15. The system of claim 14 wherein each of the controllers wirelessly communicates temperature values used to adjust the estimated amount of current to the master controller.

16. The system of claim 14 wherein each of the controllers wirelessly communicates hour values used to determine the number of operational hours to the master controller.

17. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours; and

wherein the control system determines the amount of current to be provided to each LED without measuring light output of any one of the LEDs.

18. A system for illuminating an area proximate to a plurality of light emitting diodes (LEDs) where an amount of light emitted from the LEDs is proportional to an amount of current used to drive the LEDs, the system comprising:

a power system for powering the plurality of LEDs, the power system being configured to independently control the amount of current provided to each of the LEDs, and thereby, the amount of light emitted from each of the LEDs;

a control system for controlling the power system and the amount of current provided to each of the LEDs according to an efficacy maximization strategy, the efficacy maximization strategy determining the amount of current to be provided to each of the plurality of LEDs in order to provide a desired illumination pattern to the area;

wherein the control system determines the amount of current to be provided to each of the LEDs according to the efficacy maximization strategy by;

i) initially estimating the amount of current for each LED based on a number of operational hours during which that LED has been operational, and thereafter,

ii) adjusting the estimated amount of current based on an average temperature of each LED throughout the number of operational hours; and

wherein the control system wirelessly communicates with the power system to control the amount of current provided to each LED.

19. A method of controlling a number of LED based light sources to each individually output a constant amount of light when at least a first portion of the light sources rely on LEDs that already have accumulated at least 1,000 or more hours of operation than at least a second portion of the light sources, the method comprising:

driving each LED with an amount of current necessary for each of the LEDs to output the constant amount of light without actually measuring LED light output; and

determining the amount of current for each LED to be one of a first amount, a second amount, and a third amount, the first amount being determined solely as a function of a number of hours of operation if an average temperature throughout the number of hour of operation is within a nominal temperature range, the second amount being less than the first amount and determined as a function of the number of hours operation and the average temperature throughout the number of hours of operation if the average temperature is less than the nominal temperature range, and the third amount being greater than the first amount and determined as a function of the number of hours of operation and the average temperature throughout the number of hours of operation if the average temperature is greater than the nominal temperature range.