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WO2006072081A1 - Luminaire a decharge a haute intensite interruptible avec moyens de changement de couleurs - Google Patents

Luminaire a decharge a haute intensite interruptible avec moyens de changement de couleurs Download PDF

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Publication number
WO2006072081A1
WO2006072081A1 PCT/US2005/047621 US2005047621W WO2006072081A1 WO 2006072081 A1 WO2006072081 A1 WO 2006072081A1 US 2005047621 W US2005047621 W US 2005047621W WO 2006072081 A1 WO2006072081 A1 WO 2006072081A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
housing
hid
lighting fixture
capacitance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2005/047621
Other languages
English (en)
Inventor
Roger F. Ii Buelow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Energy Focus Inc
Original Assignee
Fiberstars Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fiberstars Inc filed Critical Fiberstars Inc
Publication of WO2006072081A1 publication Critical patent/WO2006072081A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2923—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions

Definitions

  • the present invention relates to an HID lighting fixture with circuitry operated in response to brief interruptions of power applied to the fixture, typical circuitry consisting of color-changing means. More particularly, the invention relates to the foregoing HID lighting fixture provided with circuitry to ensure that the HID lamp is in the lit state immediately upon the reapplication of power following the brief interruption of power.
  • Submersible, underwater lighting fixtures for pools or other bodies of water often include color-changing means for coloring the light emitted into the body of water.
  • Such lighting fixtures typically employ brief interruptions of power to control the color emissions from the fixture.
  • These fixtures allow the user to momentarily turn power off and on to effect changes in the color output of the fixture.
  • this method of control is simple and effective.
  • HID high intensity discharge
  • HID arc lighting sources require several minutes to cool off before they can be relit by a typical ballast. This is because a hot HID arc tube contains relatively high gas pressures that require unusually high voltages to initiate an arc.
  • HID lighting is a more efficient form of lighting, it would be desirable to overcome the foregoing restart time problem. In particular, it would be desirable to provide an HID lighting fixture with circuitry to ensure that the HID lamp is in the lit state immediately upon the reapplication of power following a brief interruption of power.
  • an intermptible HID lighting fixture which comprises a housing and at least one HID light source within the housing.
  • a ballast circuit is also contained within the housing for starting the at least one HID light source.
  • the housing also contains a DC power supply, which supplies power to the ballast circuit.
  • a control mechanism within the housing ensures that the HID lamp is in the lit state immediately upon the reapplication of power following a brief interruption of power applied to the fixture.
  • the control mechanism comprises a keep- alive capacitance for supplying the at least one HID lamp with power during the brief interruptions of power.
  • the lighting fixture may include a motor-driven color wheel within the housing whose operation is remotely controlled by a user-operated power switch.
  • the foregoing HID lighting fixture includes circuitry to ensure that the HID lamp is in the lit state immediately upon the reapplication of power following a brief interruption of power.
  • the claimed lighting design avoids the otherwise lengthy restart interval commonly experienced by HID lighting systems when power is briefly interrupted.
  • This innovation renders practical use of timed interruptions of applied power for remote process control.
  • An especially preferred remote process concerns controlling the time-changing colored emissions of light from a lighting fixture in such a manner as to be synchronized with the colored emissions of light from one or more other lighting fixtures.
  • Fig. 1 is a top view of an HID lighting fixture in accordance with the invention, partially in cross section and partially in block.
  • Fig. 2A shows a graph of power applied over time to the lighting fixture of Fig. 1.
  • Fig. 2B shows a graph corresponding to Fig. 2A of power applied over time to an HID lamp of the lighting fixture of Fig. 1.
  • Fig. 3 shows an electrical schematic diagram, partially in block, of an HID lighting fixture in accordance with the invention.
  • Typical HID lighting fixtures Fig. 1 shows an underwater, submersible lighting fixture 10 that includes an HID source 12a.
  • the lighting fixture 10 also contains a housing 14 that is preferably waterproof.
  • HID source 12a and base 12b, together with an integral lamp ballast 16, color wheel motor 18a and its controller 18b, and a preferably dichroic color wheel 20 turned by motor 18a, are contained within housing 14.
  • Housing 14 may include a shell 15a of stainless steel, for instance, and optical material 15b such as glass to allow the light from HID source 12a to reach a body of water (not shown), for instance.
  • Exterior to housing 14 is an AC power source 21 for supplying power to ballast 16 and controller 18b via a user-operated power switch 22, allowing a user to selectively supply power to lighting fixture 10.
  • Ballast 16 is used to ignite an arc (not shown) in HID source 12a.
  • color wheel 20 changes the predominantly white light of HID source 12a into a sequence of colors of light, which is more pleasing to the eye than merely white light.
  • Color wheel motor 18a and its controller 18b permit either a continuously changing sequence of colors or a single time-static color to be displayed, under the control of a user.
  • an energy storage device comprising a capacitor, or more generally capacitance, is included in the ballast circuit so as to provide temporary power to the lamp and keep it lit for the brief interval during which the fixture is without power. This interval is typically from about 1 second to about 4 or 5 seconds, for example, 3 seconds.
  • a capacitance used for the foregoing keep-alive function is referred to herein as a keep-alive capacitance.
  • low-voltage capacitors i.e., capacitors rated at below 15 volts — are smaller than their higher voltage counterparts for an equal amount of energy storage, it is advantageous to use the electrical charge stored in a low voltage, 12 volt DC capacitance.
  • a low voltage capacitance may typically be considered a "small form" electrical device, by which is meant that the device does not enlarge the size of the control electronics by more than 50 %.
  • the stored charge in the 12 volt capacitance may be used to power an inverter (not shown) to convert the stored energy into 100 volt AC power, for instance, suitable for powering a typical HID source.
  • Figs. 2A and 2B illustrate typical powering of an HID lamp during a brief power interruption in accordance with the invention. Curve 24 in Fig. 2A, showing power to an overall HID lighting fixture, drops to zero at time 25a and remains at zero until resumption of fixture power at time 25b.
  • Typical durations of power being interrupted between times 25a and 25b are described above, and could be 3 seconds, for instance.
  • Fig. 2B shows power to an HID lamp being kept alive during the power interruption between times 25a and 25b.
  • Curve 26 preferably dips from time 25a to time 25b.
  • the HID lamp preferably can operate at substantially reduced power of, for instance, 10 percent to 30 percent of nominal power, during the power interruption. This reduces the required energy storage of a capacitance (not shown), referred to herein as a keep-alive, capacitance.
  • some HID lamps may not operate if the power supplied to them is substantially reduced. In such a case, curve 26 would have a reduced dip during the power interruption. 3.
  • Fig. 3 shows specific embodiment of the present invention, typically comprising a lighting fixture 30 including DC power supply 31 along with a one-way current valve 32 such as a DC blocking diode serially coupled to a keep-alive capacitance 34.
  • the keep-alive capacitance and the one-way current valve are connected across output terminals of the DC power supply.
  • DC power supply 31 may provide an DC output of, for example, 12 volts, and may receive a preferably 120 volt AC input 28 except when interrupted by a user-operated power switch 29 during brief power interruptions, for instance.
  • Keep-alive capacitance 34 is connected across the input of a lamp ballast 16 with an inverter-based design for supplying an AC voltage of, for instance, 40-360 volts to an HID source 12a, which may have a nominal power rating of 68 watts, for instance.
  • HID source 12a may be a type ANSI M110/0 sold by Venture Lighting of Solon, Ohio.
  • Ballast 16 may of the type disclosed in US Patents 5,036,256 and 6,329,762, for instance.
  • Capacitance 34 may comprise a small form, 12 volt, one Farad capacitance, by way of example, for powering HID lamp 12a via ballast 16.
  • One-way current valve 32 prevents power from flowing back into DC power supply 31 when power switch 29 is turned off.
  • a user controls power switch 29 to initially turn on HID source 12a, and also to briefly turn off power to lighting fixture 30 when desired for some form of remote process control (e.g., rotational control of a color wheel).
  • some form of remote process control e.g., rotational control of a color wheel.
  • the energy stored in keep-alive capacitance 34 keeps HID source 12a alive.
  • HID source 12a is kept alive at a power level that is substantially reduced from nominal, as described above in connection with Fig. 2B.
  • the present invention applies to an HID lighting system irrespective of whether a remote process is controlled by brief, timed power interruptions or not. That is, the invention has general applicability to HID lighting systems that do not employ color wheels controlled by brief interruptions of power, or other remote processes.
  • the HID lighting fixtures described above include circuitry to ensure that the
  • HID lamp is in the lit state immediately upon the reapplication of power following a brief interruption of power.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

La présente invention a trait à un luminaire à décharge à haute intensité interruptible comportant un boîtier et au moins une source lumineuse à décharge à haute intensité à l'intérieur du boîtier. Le boîtier renferment également un circuit régulateur pour le démarrage de ladite au moins une source lumineuse à décharge à haute intensité. Le boîtier contient en outre une alimentation en courant continu qui alimente le circuit régulateur. Un mécanisme de commande au sein du boîtier assure que la lampe à décharge à haute intensité se trouve dans un état allumé immédiatement après le rétablissement d'alimentation suite à une brève interruption d'alimentation appliquée au luminaire. Le mécanisme de commande comporte une capacité d'entretien pour fournir de l'énergie à ladite au moins une lampe à décharge à haute intensité lors de brèves interruptions d'alimentation. Le luminaire peut comporter une roue de couleurs motorisée au sein du boîtier dont le fonctionnement est télécommandé par un commutateur d'alimentation commandé par l'utilisateur.
PCT/US2005/047621 2004-12-30 2005-12-30 Luminaire a decharge a haute intensite interruptible avec moyens de changement de couleurs Ceased WO2006072081A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64048604P 2004-12-30 2004-12-30
US60/640,486 2004-12-30

Publications (1)

Publication Number Publication Date
WO2006072081A1 true WO2006072081A1 (fr) 2006-07-06

Family

ID=36615271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/047621 Ceased WO2006072081A1 (fr) 2004-12-30 2005-12-30 Luminaire a decharge a haute intensite interruptible avec moyens de changement de couleurs

Country Status (1)

Country Link
WO (1) WO2006072081A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020175637A1 (en) * 2001-05-26 2002-11-28 Nextek Power Systems, Inc. Remote control of electronic light ballast and other devices
US6774584B2 (en) * 1997-08-26 2004-08-10 Color Kinetics, Incorporated Methods and apparatus for sensor responsive illumination of liquids
US6781329B2 (en) * 1997-08-26 2004-08-24 Color Kinetics Incorporated Methods and apparatus for illumination of liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6774584B2 (en) * 1997-08-26 2004-08-10 Color Kinetics, Incorporated Methods and apparatus for sensor responsive illumination of liquids
US6781329B2 (en) * 1997-08-26 2004-08-24 Color Kinetics Incorporated Methods and apparatus for illumination of liquids
US20020175637A1 (en) * 2001-05-26 2002-11-28 Nextek Power Systems, Inc. Remote control of electronic light ballast and other devices

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