DE102007058982A1 - Operating device for e.g. gas-discharge lamp in emergency light device, has interface formed as input port, and control unit designed to switch interface such that interface serves for voltage supply for illuminating unit i.e. LED - Google Patents

Abstract

The device i.e. electronic ballast (51), has an interface (5) formed as input port and/or designed for a photosensor. A control unit (56) e.g. microcontroller, is designed to switch the interface in such a manner that the interface serves for voltage supply for an illuminating unit i.e. LED (57). A transformer is provided for transmission of electricity between a primary winding and a secondary winding. A coil of the transformer is intended to measure tension for voltage supply over the interface. The transformer is switched-on or switched-off by a controllable switch. An independent claim is also included for a method for utilizing supply of a lighting unit.

Description

The The present invention relates to the operation of bulbs such as fluorescent lamps and gas discharge lamps. The invention in particular relates to an operating device or an electronic Ballast via an input interface has, to which a light sensor for monitoring the brightness is connectable, and method of use this input interface.

It is already out of the EP 0 965 252 B1 basically known that an electronic ballast for operating a lamp has a connection device to which a light sensor for monitoring the brightness of a specific spatial area can be connected. The light sensor used for brightness control detects brightness actual values in a region illuminated by a lamp. These brightness actual values are fed to the operating device via this connection device. The lamp whose brightness is detected by the light sensor is controlled by this operating device according to the brightness actual values or the lighting is dimmed.

Parallel to this first connection device has the electronic Ballast further connections for reception from external control information, for example via a bus line. The electronic ballast can so various information or commands are supplied, such as external dimming setpoints. Furthermore, over the control connections switch on or switch off commands transmitted for the electronic ballast become.

be noted remains that this measuring terminal device for the connection of Light sensors or brightness-dependent resistors is used. If a light sensor is connected to the device, this is checked by the operating device and detected, so that the brightness of the lamp according to the sensor value can be set or dimmed. The external control information regarding the brightness of the lamp are in this case for the operation of the lamp is not considered.

If no light sensor connected to the electronic ballast on the other hand, the operating device can over the other digital control connections such as DALI or DSI connections are controlled. Because of the low Signal transmission rate of such digital terminals or interfaces can be connected lamps by means of external control information on fast changing Brightness actual values can not be controlled. Therefore it is after this State of the art not possible, lighting effects with very to realize fast light changes.

The Accordingly, the invention has set itself the task of improving Technology to provide a lamp to provide, which in particular the use of interfaces is improved.

The The object is achieved by the characterizing features of the claims solved, whereby the combination of the claims as a particularly advantageous solution to the problem distinguished.

According to one The first aspect of the present invention is an operating device proposed for a first lamp, comprising a formed as an input channel interface, a control unit, which is designed to switch the interface in such a way that the interface is used as a power supply for a second illuminant is used, and a transformer for transmission electrical energy between a primary winding and a secondary winding. Another winding of the transformer is intended to supply a voltage to the power supply via to tap the interface.

Of the Transformer can be controlled via a controllable switch or be switched off.

Of the controllable switch can be controlled by the control unit.

The further winding of the transformer can be controlled via a Switch on or off.

The Another winding of the transformer can be a clocked voltage be arranged in the operating device.

Of the Transformer can be designed as a heating transformer and part be a heating circuit.

The Secondary winding can be used to generate a heating voltage serving DC voltage to be formed.

The serving as a heating voltage DC voltage can be used to preheat the first lighting means, in particular for preheating a heating coil of the first lighting means, be formed.

Of the Transformer may be formed as part of an ignition circuit be.

The transformer may include a pulse transformer for generating ignition pulses for the first Be bulb.

Especially The transformer may be in a pulsed power factor correction be arranged of the operating device.

The Another winding of the transformer can be used to inject a DC voltage be educated.

The Operating device may have a bus voltage circuit to provide a DC supply voltage from the tapped Tension.

The Bus voltage circuit may be controllable by the control unit.

The DC supply voltage provided by the bus voltage circuit may be a low voltage voltage for operating a trained as an emergency light be the second light source.

The Operating equipment can be means for rectification and smoothing have the tapped voltage.

The Control unit can be designed in the form of a microcontroller.

According to one Another aspect of the present invention is an emergency lighting device for operating a first light source in normal operation and for Operation of a second light source proposed in emergency operation. The emergency light device has an operating device described above on.

The Emergency light device can be the first light source a gas discharge lamp exhibit.

The second illuminant of the emergency device may be a light emitting diode be.

According to one Another aspect of the present invention is an electronic Ballast proposed with an operating device described above.

According to one Another aspect of the present invention is a control unit proposed for an above-described operating device.

According to one Another aspect of the present invention is a control unit for a control gear for a first Suggested light source, wherein the operating device a formed as an input channel interface, a transformer for transmitting electrical energy between a primary winding and a secondary winding, and another winding of the Transformer for picking up a voltage to the power supply via has the interface. The control unit is designed to to switch the interface such that the interface as Power supply for a second bulb is used.

According to the invention also an operating device for operating at least a light source provided, having as an input channel trained interface. This interface is on an output channel switchable.

According to the invention an operating device for operating at least one lamp proposed. The operating device has an interface with lines on, both as input lines and as output lines are usable. The interface can be designed as a smart input channel be. Preferably, the interface to different functions be programmable. The interface can serve as an output channel for deployment a voltage, in particular a low-voltage, serve. The Provided voltage can be designed to operate an external device be. The interface can be used to supply at least one additional Be light activated. The voltage provided may preferably for operating an emergency light, in particular in the form of a light-emitting diode, serve. Alternatively or additionally, the provided Voltage for operating a luminaire for transmitting a Addressing be designed. Activation of the interface as active or as output interface can via control terminals to receive control information.

According to the invention an operating device for operating at least one lamp proposed, comprising an output interface for transmission of data, this output interface for outputting a Supply voltage for external devices configurable is.

According to the invention also a system for operating at least one light source provided, having such a control gear. The system can a trained as a gas discharge lamp or fluorescent lamp Have light bulbs. Preferably, the system may have an emergency light, wherein the operating device is designed to over the interface to operate the emergency light. The emergency light can In particular, be an LED (light emitting diodes) emergency light.

According to the invention An electronic ballast is provided, comprising such a control gear.

The invention will be described below with reference to preferred embodiments with reference to the attached drawing.

there shows:

1 schematically generally a system according to the present invention,

2 schematically another embodiment of a system according to the present invention

3 an embodiment of the invention for power supply for the interface, and

4 a further embodiment of the invention for power supply for the interface.

5 a further embodiment of the invention for providing a power supply for the interface.

1 is a schematic representation of an embodiment of a system 1 according to the present invention. The system 1 essentially comprises a control gear 2 for operating one or more lamps 3 , The operating device 2 In particular, an electronic ballast 2 for at least one lamp 3 be, in particular for at least one fluorescent lamp such as a gas discharge lamp. However, the bulbs may also be, for example, light-emitting diodes.

The electronic ballast shown 2 has inputs 4a and 4b a light sensor interface 5 , as well as two control inputs 6a and 6b for connecting a preferably digital control bus or control lines 7a and 7b , on.

The inputs 4a . 4b and the control inputs 6a and 6b are to a control device 8th of the electronic ballast 2 connected.

To the light sensor interface 5 of the electronic ballast 2 An external resistor can be connected. In particular, a light sensor or photoresistor may be applied to the light sensor interface 5 be connected. Such a known light sensor (not shown) is designed to measure the brightness of the light incident thereon.

Is a light sensor to the sensor interface 5 actually connected, the brightness actual values of a region monitored by the light sensor can be supplied to the electronic ballast 2 be supplied, wherein the control device 8th of the electronic ballast 2 then depending on the supplied brightness actual values can dim the serving for illumination of the monitored area lamp.

As in 1 can be seen in the system 1 an analog or digital signal source to the intended for receiving brightness values sensor interface 5 connected.

The sensor interface 5 , which is also called smart input channel, so it can be designed programmable to different functions.

After the in 2 shown embodiment, this interface 5 or the smart channel can be switched to an output.

This interface 5 , which is preferably designed to connect a light sensor, according to the invention can also be configured for use as an output line in addition to the connection of a passive electronic or optoelectronic device or to receive an actively transmitted signal. This configuration is done by a control unit 56 and may be executed in accordance with corresponding configuration or control information, this control information then preferably via the control ports 6a . 6b the control unit 56 be transmitted.

This in 2 shown system 50 for emergency lighting includes an electronic ballast 51 which can perform the input functions described above and also provide a power supply for an LED (light emitting diode) in emergency lighting operation.

The lamp 3 is via a control output 53 from the electronic ballast 51 operated or supplied with electricity. This supply takes place in the usual way, which is not described here in detail, and uses a mains voltage Un.

Below this at the entrance 52 provided mains voltage Un are here primarily AC voltages with, for example, 220 V or 230 V and DC voltages with voltages of, for example, 12, 24 or 48 V are considered.

The system 50 has a light emitting diode 57 , Preferably a plurality of light-emitting diodes, which, when the mains voltage Un falls below a predefined value via the control unit 56 to a battery 55 is switchable. The control unit 56 detects such a drop in the mains voltage Un and switches the battery 55 such that this is the light emitting diode 57 over the interface 5 operating in an emergency lighting mode.

In emergency lighting mode, the luminous efficacy of the LED is 57 preferably lower than that of the normal mode operated lamp 3 to the battery 55 to protect.

The emergency lighting system operates an emergency lighting as soon as the mains supply Un or power supply for other lighting elements, here the lamp 3 , fails.

As long as the mains supply is available or sufficient, the battery becomes 55 or generally a DC voltage source by means of one of the control unit 56 controlled charging circuit 54 charged.

The emergency lighting or the light-emitting diode 57 Preferably further units may be connected upstream, such as a step-up converter.

The battery 55 or other units of the in 2 Ballast shown 51 could also be external, ie outside the ballast 51 , be provided. An external battery can thus simultaneously the emergency lighting of several ballasts 51 operate.

Various Lamp types are available as an emergency lighting element to choose from. In one preferred embodiment, the emergency light is made one or more light emitting diodes. Alternatively, a conventional Filament lamp can be used. Fluorescent lamp can can also be used as an emergency light, in which case care is taken must, that such fluorescent lamps need a certain amount of time, at least several minutes to be heated and with maximum Intensity to be able to shine.

According to this Embodiment is thus generally the smart channel active, d. H. switched with power supply. Thus, you can different auxiliary light sources are supplied. An example is an emergency light LED.

The connected light source, in particular LED, but can also be used for example for the transmission of addressing. This can be the addressing of the lamp 3 in a lighting system, such. In a DALI lighting system. The transmission takes place preferably and in a known manner by means of modulation of the light emitted by the light-emitting diode.

Hereinafter, embodiments such as the sensor interface and the smart channel will be explained 5 can be configured as an active channel switchable, so this interface 5 as a power supply for z. B. an LED 57 can serve.

3 shows a hardware embodiment 60 to the power supply for the interface 5 starting from a heating circuit HzK.

The illustrated electronic ballast 51 is equipped inter alia with the heating circuit HzK to provide a DC voltage UH and with a primary side integrated in the heating circuit HzK heating transformer HzTr, at its primary winding 61 the applied by the heating circuit HzK DC voltage UH is applied.

Over two secondary windings 62 . 63 of the heating transformer HzTr are two DC voltages Uwl or Uw2 serving as heating voltages in the load circuit LK of the electronic ballast 51 inductively coupled. These DC voltages Uwl or Uw2 are used to preheat the two heating coils W1 and W2 of the gas discharge lamp 3 needed. The heating coils W1 and W2 are preheated in particular to the temperature required for lamp operation in order to enable ignition of the lamp.

The heating circuit HzK can be switched on or off via an electronically controllable power switch T4 as needed. The power switch T4 is supplied via its gate electrode, an analog control signal Ust4, which is provided by the control unit 56 is produced. The control unit 56 can be configured in particular in the form of a microcontroller μC1.

The electronic ballast 51 furthermore has a DC bus voltage circuit AS, which has an additional secondary winding 64 of the heating transformer HzTr picks up electrical energy inductively. The voltage Uab is correspondingly obtained from the DC voltage UH provided by the heating circuit HzK for the coil preheating.

The coupled-in voltage Uab can then be used as a DC or DC supply voltage Ubus via the interface 5 z. B. for the operation of a light emitting diode 57 be provided as an emergency light.

The power supply for the LED 57 is thus produced according to the invention such that the control unit 56 for connection or disconnection of the light emitting diode 57 the interface 5 active or passive switches.

The DC-DC converter, which is the primary winding 61 and the secondary windings 62 . 63 of the heating transformer comprises HzTr, for the translation of the DC voltage UH in two serving as heating voltages DC voltages Uw1 and Uw2, ie for filament heating, preferably as a fly be designed back converter (also called flyback converter or blocking oscillator).

Furthermore, the DC-DC converter, which acts as a supply tap of the LED 57 including the primary winding 61 as well as the additional secondary winding 64 of the heating transformer comprises HzTr, as a forward converter (also called flow converter) may be formed.

This converter selection for the coil heater and for the power supply of the LED 57 offers the advantage that over the duty cycle of the primary-side switch T4, the heater and the LED 57 be supplied independently of each other and in particular according to their needs. The heat output of the flyback converter increases with increasing duty cycle, while the forward converter to power the LED 57 the energy is relatively independent. The forward converter is then preferably dimensioned via the design of the components.

The supply of the LED 57 over the additional secondary winding 64 can through another switch 65 on the output side are switched on or off, see 3 ,

In order to avoid an inductive coupling of high-frequency noise spikes from the load circuit LK, the over the additional secondary winding 64 of the heating transformer HzTr tapped voltage Uab rectified and smoothed using a consisting of a rectifier diode D2 and a storage capacitor C3 peak rectifier.

Upon detection of a rising edge of one of the control unit 56 The output voltage UC3 of the peak value rectifier supplied to the storage capacitor C3 and fed to an analog input terminal of the electronically controllable switch ESS1 to a digital control signal input EN of a digital control signal UEN1 supplied on the output side electronically controllable switch ESS1 is the output terminal of the interface as the DC bus supply voltage Ubus 5 connected.

According to the in 3 shown embodiment of the invention is thus about a further winding 64 at the heater HzK generates a DC voltage Ubus, which is used to power a light emitting diode 57 , in particular for an emergency light can be used. This can thus be the power supply of the actively connected smart channel or interface 5 represent.

According to the invention, the secondary winding 64 for tapping the DC voltage Ubus all clocked voltages in the electronic ballast or operating device 51 to be ordered.

In the 3 Thus, shown heating circuit is only a particular embodiment of it. For example, with its own switching power supply of the electronic ballast 51 the low-voltage supply is clocked. Another embodiment of the invention is the clocked power factor correction.

Finally, the ignition transformer is usually clocked and can thus as a tapping point with another winding for the DC voltage to supply the LED 57 serve.

4 shows such an inventive embodiment of providing the power supply for the interface 5 based on an ignition circuit.

The ignition circuit 70 has a pulse transformer 78 , whose first secondary winding 76 in series with the gas discharge lamp 3 is switched, and its primary winding 75 in series with a switching element 72 is switched.

The series connection from the primary winding 75 and the switching element 72 is parallel to a surge capacitor 71 arranged, in turn, this parallel connection in series with a charging resistor 73 and a controllable switch 74 is switched.

With the help of the controlled switch 72 can now the recovery time of the switching element 72 which is, for example, a four-layer diode, a triac, a sidac, a gas gap or a transistor controlled in a rectifier bridge, can be significantly reduced.

The control circuit 56 serves to control the controllable switch 74 , This control takes place in particular in terms of time as a function of the occurrence of an ignition pulse for the gas discharge lamp 3 ,

In the electronic ballast is using an additional secondary winding 77 tapped a voltage via a switch 79 as DC voltage at the analogue output of the interface 5 for the supply of the light-emitting diode, for example 57 can be made available.

5 shows a further embodiment of the invention for providing a power supply for the interface 5 based on an ignition circuit 80 ,

In 5 is a full bridge circuit with four FET switches S1, S2, S3 and S4 shown, wherein the gas discharge lamp 3 in a bridge branch 84 the full bridge is switched. These switches S1, S2, S3 and S4 are in the normal operating phase after the ignition of the lamp according to a predetermined switching behavior by a control circuit 81 for example, in an ASIC or in the electronic ballast 51 can be integrated.

Furthermore, a flyback converter (chopper) 82 For example, provided in the form of a self-locking n-channel MOSFET, whose task is to RF ignition pulses via a transformer 83 Inductively in the bridge branch 84 engage. Every time when from the control circuit 81 an ignition pulse by means of the flyback converter 82 is driven, at high frequency, a voltage UAC to the primary winding 85 of the transformer 83 created and via a first secondary winding 86 in the bridge branch 84 induced. This voltage UAC may be, for example, the output voltage of a power factor correction or PFC circuit (not shown).

A second secondary winding 87 is intended to provide a voltage to power the LED 57 tap off. The tapped voltage is preferably similar to that in FIG 4 , via a switch 88 as DC voltage at the analogue output of the interface 5 made available.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 0965252 B1 [0002]

Claims (26)

Operating device ( 51 ) for a first light source ( 3 ), having as an input channel, for example, formed for a light sensor interface ( 5 ), a control unit ( 56 ), which is adapted to the interface ( 5 ) such that the interface ( 5 ) as power supply for a second light source ( 57 ) serves. Operating device according to claim 1, wherein the Switchover by eg. Via a bus line, in particular a digital bus transmitted commands triggered is that an interface of the operating device fed are. Operating device according to claim 1 or 2, further comprising a transformer (HzTr) for transmitting electrical energy between a primary winding ( 61 ) and a secondary winding ( 62 . 63 ), wherein another winding ( 64 ) of the transformer (HzTr) is provided to supply a voltage (Uab) to the power supply via the interface ( 5 ). Operating device ( 51 ) according to one of the preceding claims, wherein the transformer (HzTr) via a controllable switch (T4) is switched on or off. Operating device ( 51 ) according to claim 4, wherein the controllable switch (T4) of the control unit ( 56 ) is controllable. Operating device ( 51 ) according to one of the preceding claims, wherein the further winding ( 64 ) of the transformer (HzTr) via a controllable switch (T4, 65 ) is switched on or off. Operating device ( 51 ) according to one of the preceding claims, wherein the further winding ( 64 ) of the transformer (HzTr) of a pulsed voltage in the operating device ( 51 ) is arranged. Operating device ( 51 ) according to one of the preceding claims, wherein the transformer (HzTr) is designed as a heating transformer and is part of a heating circuit (HzK). Operating device ( 51 ) according to claim 8, wherein the secondary winding ( 62 . 63 ) is designed to generate a direct voltage serving as a heating voltage (Uw1, Uw2). Operating device ( 51 ) according to claim 8 or 9, wherein the DC voltage (Uw1, Uw2) serving as heating voltage for preheating the first lighting means ( 3 ), in particular for preheating a heating coil (W1, W2) of the first luminous means ( 3 ), is trained. Operating device ( 51 ) according to one of claims 1 to 7, wherein the transformer ( 78 ) as part of an ignition circuit ( 70 ) is trained. Operating device ( 51 ) according to claim 11, wherein the transformer ( 78 ) a pulse transformer for generating ignition pulses for the first lighting means ( 3 ). Operating device ( 51 ) according to one of claims 1 to 7, wherein the transformer in a clocked power factor correction of the operating device ( 51 ) is arranged. Operating device ( 51 ) according to one of the preceding claims, wherein the further winding ( 64 ) of the transformer (HzTr) for coupling a DC voltage (Uab) is formed. Operating device ( 51 ) according to one of the preceding claims, comprising a bus voltage circuit (AS) for providing a DC supply voltage (Ubus) from the tapped voltage (Uab). Operating device ( 51 ) according to claim 15, wherein the bus voltage circuit (AS) from the control unit ( 56 ) is controllable. Operating device ( 51 ) according to claim 15 or 16, wherein the DC supply voltage (Ubus) provided by the bus voltage circuit (AS) generates a low-voltage voltage for operating a second light-emitting means (FIG. 57 ). Operating device ( 51 ) according to one of the preceding claims, comprising means (D2, C3) for rectifying and smoothing the tapped voltage (Uab). Operating device ( 51 ) according to one of the preceding claims, wherein the control unit ( 56 ) is in the form of a microcontroller or ASIC. Emergency light device for operating a first light source ( 3 ) in normal operation and for operating a second light source ( 3 ) in emergency mode, comprising an operating device according to one of the preceding claims. Emergency lighting device according to claim 20, comprising a gas discharge lamp as first light source ( 3 ). Emergency lighting device according to claim 20 or 21, wherein the second lighting means ( 57 ) is a light emitting diode. Electronic ballast with a control gear ( 51 ) according to one of claims 1 to 19. Control unit ( 56 ) for a control gear ( 51 ) according to one of claims 1 to 19. Control unit ( 56 ) for a control gear ( 51 ) for a first light source ( 3 ), whereby the operating device ( 51 ) an interface formed as an input channel ( 5 ), a transformer (HzTr) for transmitting electrical energy between a primary winding ( 61 ) and a secondary winding ( 62 . 63 ), and another winding ( 64 ) of the transformer (HzTr) for picking up a voltage (Uab) for supplying power via the interface ( 5 ), wherein the control unit ( 56 ) is adapted to the interface ( 5 ) such that the interface ( 5 ) as power supply for a second light source ( 57 ) serves. Method for using the supply of a first light source ( 3 ) for supplying a second light source ( 57 ), wherein the supply of the first light source ( 3 ) is based on a transformer (HzTr) for transmitting electrical energy between a primary winding ( 61 ) and one with the first light source ( 3 ) coupled secondary winding ( 62 . 63 ), wherein a further secondary winding ( 64 ) of the transformer (HzTr) a voltage (Uab) for supplying the second light source ( 57 ) picks up.