VARIABLE LIGHT CONTROL SYSTEM AND METHOD USING MOMENTARY CIRCUIT INTERRUPT

• US 20110080105A1
• Filed: 10/05/2009
• Published: 04/07/2011
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: Hubbell Lighting Incorporated (Hubbell, Inc.)
• Original Assignee: Hubbell, Inc.
• Inventors: Mayer, Thomas J., Garbowicz, Glenn D.
• Granted Patent: US 8,183,798 B2
• Time in Patent Office: Days
• US Class Current: 315/250
• CPC Class Codes: H05B 39/08 by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices in converters H02M5/00; with regulation G05F1/44
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: H05B 47/185 via power line carrier transmission

Abstract

An electronic circuit designed to reduce energy consumption by toggling between a plurality of conventional or electronic fluorescent lighting ballasts within a given fixture, and where said toggle circuit shall increase or decrease fixture light output levels according to immediate requirements. Toggle circuit may be remotely controlled from conventional Mains wall switch or other such means. Initial applications of Mains power automatically provides the minimum of light levels. Additional momentary interruptions to Mains power provides varied and/or additional lighting levels.

Claims

1. A control circuit comprising:

a power supply circuit connected to an AC power source, the AC power source supplying AC power to a lighting system comprising a first driver for powering a first light source and a second driver for powering a second light source;

a toggle circuit responsive to a power level of the power supply circuit and providing a control output based on the power level; and

a switch circuit receiving the control output from the toggle circuit and to controlling supply of the AC power to at least the second driver of the second light source based on the control output of the toggle circuit;

wherein;

an initial application of the AC power to the power supply circuit causes a first driver to turn ON the first light source; and

a first momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the initial application of the AC power causes the switch circuit to supply the AC power the second driver to turn ON the second light source.

2. The control circuit of claim 1, wherein the initial application of the AC power results in a lower brightness output level of the lighting system than the brightness output level after the first momentary interruption.

3. The control circuit of claim 1, wherein a second momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the first momentary interruption causes the switch circuit to cut the supply of the AC power to the second driver to turn OFF the second light source.

4. The control circuit of claim 1, further comprising a reset circuit configured to reset the control output of the toggle circuit after a prolonged absence of the applied AC power to the power supply circuit.

5. The control circuit of claim 1, wherein:

the lighting system further comprises a third light source;

the switch circuit controls supply of the AC power to the first driver of the first light source and to the second driver of the second light source based on the control output of the toggle circuit;

the first momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the initial application of the AC power further causes the switch circuit to cut the supply of the AC power to the first driver to turn OFF the first light source;

a second momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the first momentary interruption causes the switch circuit to supply the AC power to the first driver to turn ON the third light source.

6. The control circuit of claim 5, wherein:

a third momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the second momentary interruption causes the switch circuit to cut the supply of the AC power to the second driver to turn OFF the third light source.

7. The controller of claim 5, wherein the first light source provides ⅓

of light output of the lighting system, the second light source provides ⅔

of light output of the lighting system, and the third light source provides full light output, equal to ⅓

+⅔

, of the lighting system.

8. A method for controlling supply of AC power comprising:

selectively supplying AC power to a first driver of a lighting system when initially supplying the AC power to the lighting system, the lighting system comprising a first driver for powering a first light source and a second driver for powering a second light source

determining if a momentary interrupt of the AC power has occurred after initially supplying the AC power; and

supplying the AC power to at least the second driver of the second light source when determining that a first momentary interruption of the AC power has occurred.

9. The method of claim 8 further comprising:

cutting the supply of the AC power to the second driver of the second light source when determining that a second momentary interruption of the AC power has occurred after the first momentary interruption.

10. The method of claim 8, wherein the lighting system further comprises a third light source, the method comprising:

cutting the supply of the AC power to the first driver of the first light source when determining that the first momentary interruption of the AC power has occurred; and

supplying the AC power to the first driver of the first light source when determining that a second momentary interruption of the AC power has occurred after the first momentary interruption.

11. The method of claim 10 further comprising:

cutting the supply of the AC power to the second driver of the when determining that a third momentary interruption of the AC power has occurred after the second momentary interruption.

12. The method of claim 10, wherein the first light source provides ⅓

of light output of the lighting system, the second light source provides ⅔

of light output of the lighting system, and the third light source provides full light output, equal to ⅓

+⅔

, of the lighting system.