AT14625U1 - LED light path for emergency lighting operation - Google Patents

Abstract

An LED light path (LMS, LMS ') for an emergency light operation is provided, comprising at least one light-emitting diode (L) with an LED light chain or at least two parallel and / or counterparallel LED light source chains (LMK1, LMK2, LMK3), wherein the LED illuminant path (LMS, LMS ') has a control unit (SE) and is fed via a supply (V) which is set up to receive information about an emergency light operation and optionally dimming information via the supply (V) and depending on the information supplied via an emergency lighting operation and optional dimming information and their implementation stepwise switched on and / or off individual of the parallel / parallel LED LED light chains (LMK1, LMK2, LMK3) and / or individual LED of a light source chain (LMK1, LMK2 , LMK3).

Description

description

LED LUMINAIRES FOR EMERGENCY LIGHT OPERATION

The invention relates to an LED illuminant path for emergency lighting operation. The LED illuminant path has at least one LED illuminant chains or at least two parallel and / or counterparallel connected LED illuminant chains and a control unit. In particular, the LED light source chains are configured as LED chains and each LED light source chain has at least one light emitting diode, that is to say an LED, as light source. Furthermore, the invention relates to a method for operating an LED light path, a LED lamp comprising an LED light path according to the invention, and a retrofit lamp comprising an LED light path according to the invention. Under a Leuchtdio¬de (LED) are both inorganic and organic light-emitting diodes to understand.

Under "LED lamps " In particular, LED lamps are to be understood which use one or more LEDs as the light source but have a housing and preferably an optical system, and have means for mechanically and electrically connecting the LED lamp and an electronics for feeding the LED.

[0003] Under "retrofit lamps" In particular, retrofit LED lamps are to be understood which use one or more LEDs as the luminous means, but are designed for mechanical and electrical connection in such a way that they can be used as substitutes for other illuminants, such as, for example, fluorescent or halogen lamps.

Retrofit lamps are provided with screw, bayonet or plug sockets, which are suitable for the developed for incandescent or halogen lamps sockets. However, this mechanical adjustment alone is not yet sufficient for replacement. On the other hand, because of the different operations of incandescent lamps (processing alternating half-waves with both polarities) on the one hand and light-emitting diodes (only effective with alternating half-waves of a certain polarity), adaptation measures are still required. The latter also relate in particular to the type of dimming.

A disadvantage of devices in which several identical LED chains are operated in parallel circuit directly with an AC voltage, that the LED chains in their brightness in synchronism with the AC voltage change their brightness and track the course of the AC voltage in synchronism with a brightness modulation. In order to avoid that an LED track behaves in its brightness in synchronism with the applied AC voltage, a specific number of LEDs are selectively switched on and off in synchronism with the variation of the AC voltage for each of the parallel LED chains.

However, this leads to a modulation of the brightness of the circuit shown, for example at 100 hertz, which can be stressful for the human eye, since this modulation is still perceived. In addition, no dimming is possible with the circuit of the prior art.

The object of the invention is therefore to provide a dimming technique that overcomes the disadvantages of the prior art. To this end, the invention provides an LED illuminant path for emergency lighting operation, a dimming method for emergency lighting operation, an LED lamp and a retrofit lamp according to the independent claims. Further developments of the invention are the subject of the dependent claims.

In one aspect, an LED illuminant path for emergency lighting operation is provided with at least one LED illuminant chain or two parallel and / or gegenparallel geschal¬teten LED illuminant chains each having at least one light emitting diode, wherein the LED illuminant path has a control unit and via a Supply is supplied, which is arranged to receive information about the emergency lighting operation via the supply and, depending on the supplied information about emergency lighting operation and its implementation, individually switching on and / or off individual ones of the parallel / counter parallel LED light source chains and / or individual ones Bridging the LED of the LED light chain.

At least one light-emitting diode of the LED light path can be bridged by at least one switching element provided in parallel thereto and switchable by the control unit. The control unit may activate or deactivate the switching elements, in particular in dependence on an electrical supply of the LED light path.

The electrical supply of the LED light path can be a DC voltage.

The LED illuminant path can have counterparallel switched LED light source chains and operated directly from an AC voltage. The LED illuminant path can have LED lamp chains connected in parallel and be operated directly from a DC voltage. The LED light path can have parallel switched light source chains, which are preceded by a rectifier, and operated directly from an AC voltage.

Depending on the electrical supply of the LED illuminant line, the control unit can switch on or off individual light-emitting diodes in the LED illuminant chains by activating or deactivating the switching elements, and in particular light-emitting diodes which are operated in different LED light sources. Illuminant chains substantially share a coordinate in their spatial orientation.

A converter may convert an AC voltage to a DC voltage and provide the DC voltage as an electrical supply to the LED lighting path.

The converter may change one of the LED illuminant path supplied electrical supply depending on the state of the mains supply or optionally depending on a Dimminfor- mation. The converter can be, for example, a flyback converter (isolated flyback converter), a buck converter (buck converter) or an insulated half-bridge converter. The converter can have a rechargeable battery. Optionally, the converter may comprise a battery charging circuit and / or battery discharging circuit.

The control unit can evaluate a signal transmitted by means of the supply voltage, for example an amplitude signal and / or a modulated high-frequency voltage, in order to record the information about emergency lighting operation and optionally the dimming information.

By evaluating the electrical supply of the LED luminous means path, in particular a change in the electrical supply (for example the supply voltage), the control unit can record the information about an emergency light operation and optionally the dimming information.

The electrical supply can be a Gleichspan¬nung output by a converter. The information about an emergency light operation and optionally the dimming information may be an amplitude / amplitude change of the electrical supply.

The LED light path can have a rectifier.

The light-emitting diodes and the switching elements for bridging can be arranged in a Mat¬rixstruktur, wherein in each LED illuminant line at least one LED is bridged and in each LED illuminant chain is provided at least one switchable by the controller switching element, which is adapted to turn on or off the respective LED light chain.

The illuminant chains may be LED illuminant chains and the illuminants may be LEDs.

In a further aspect, an LED lamp is provided, comprising an LED illuminant path according to one of the preceding claims.

In a further aspect, a retrofit lamp is provided, comprising an LED illuminant path according to one of the preceding claims.

In yet another aspect, a method is provided for controlling a preferably dimmable LED light path for emergency lighting operation with an LED light source chain or at least two parallel and / or counter-parallel LED light source chains each having at least one light emitting diode (LED), wherein the LED light path is fed via a supply, wherein a control unit of the LED light path detected via the supply of information about an emergency light operation and optionally dimming information detected and depending on the detected information about an emergency light operation and the optional dimming information and their implementation of each of the parallel / parallel connected LED -Luminescent chains gradually switched on and / or off.

The invention will now be described with reference to the figures. FIG. 1 shows schematically an LED illuminant path; FIG. FIG. 2 schematically shows a further LED light path; FIG. FIGS. 3a) -c) schematically circuit arrangements with the LED illuminant sections of Fig. 1 and Fig. 2; Fig. 4a) schematically a retrofit lamp with the LED illuminant path

Fig. 1; Fig. 4b) schematically a retrofit lamp with the LED illuminant path

Fig. 2; 5 shows schematically a control device for an LED illuminant path; FIG. 6 shows schematically a selective rectification with the control device of FIG. 5. FIG.

According to the invention, it is provided that information about a Notlichtbe¬trieb and optionally dimming information of a control unit is supplied to an input via the supply. The control unit now switches off, unlike the prior art, not only individual LEDs in an LED illuminant chain or LED chain, but can also perform, in particular a stepwise dimming, by selectively switching on or off complete LED Leuchtmit¬ketten.

The light path can be preceded by a converter, in particular an AC / DC converter (AC = AC voltage / current, DC = DC voltage / current, converter is converter for the conversion of AC voltage / current to DC voltage / current), so that the Illuminant chains of the light source line are not with alternating current, but with DC operations.

The converter may comprise a rechargeable battery. Optionally, the converter can have a battery charging circuit and / or battery discharge circuit.

The used AC / DC converter can also be configured to evaluate a dimming signal. This may be, for example, a Phasenanschnittsdimmsignal, a Phasenab-section dimming signal or a dimming signal resulting from the evaluation of the dimming converter supplied supply voltage half-waves.

For lighting systems with conventional incandescent bulbs have largely prevailed Pha¬senanschnittsdimmer. This is especially because they work largely lossless. However, the latter is not true for operation with LEDs. To limit the power losses, a considerable additional circuit complexity is required. In addition, phase-angle dimmers - even when operated with incandescent lamps - inevitably radiate unwanted harmonics into the network. However, modern modules are expected to have a widely sinusoidal current consumption. This can be achieved by the additional installation of actively clocked PFCs (power factor correction circuits).

Signal transmission to an AC voltage supplied electrical consumer, particularly an LED or retrofit lamp, may be accomplished by having at least the signal states "apply a phase-in / -out signal". and "no-concern of a phase-in / -out signal". or "rectified AC voltage". and "non-rectified, that is, bipolar AC voltage " available.

Starting from these two logical states, arbitrarily complex analog or digital signal protocols can be implemented. Analogously, for example, an evaluation, by a control unit, of the duration and / or a repetition rate of the respective logic state. For a digital signal transmission, the two physical states mentioned can be logically "1". and "0" be used.

This protocol may be addressed or unaddressed. In the case of addressing, data or signals may be part of the protocol.

Said communication technique by selective Phasenan / section or selek¬tives rectifying principle does not exclude that on the AC supply line weite¬re logic states can be present in addition to the two states mentioned. These can be, for example, a PLC modulation (power line carrier, high-frequency modulation with preferably low amplitude) or a temporary suppression of the AC voltage.

Also phase section or section can be implemented in combination with the selective rectification, and there are further possible combinations such as, for example, an additional amplitude modulation.

It is also fundamentally not excluded that in addition to the above-mentioned signal transmission another wireless (eg radio, optical, IR, ...) or wired medium (for example digital and / or analogue bus) is provided.

Preferably, by selective Phasenan / - section or selectively rectifying the AC supply voltage signal transmission to the controller 5. If a Rückkanal should be present, this can be done by any other type of signaling (see the examples above). Reference is made here to the document DE 10 2011089 833 A1, and in particular to FIGS. 1a, 1b and 2 with the associated description. It describes the operation of signal transmission by selective rectification in various forms.

When using the AC / DC converter thus controlling the Leuchtmittelstreckemit DC takes place. One of the AC / DC converter detected and evaluated information about emergency lighting and optional dimming information can now be evaluated by the control unit so that individual provided in the light source switching elements are switched by the control unit, so that the detected information about a Notlichtbe¬trieb and optional dimming information can preferably be done for selectively switching on and off completely / several / all light sources chains.

In particular, the light-emitting diodes (as light sources of the LED light source chains, as the LEDs of the LED chains) are arranged in a matrix arrangement and a specific number of the light-emitting diodes can be bridged by switching elements provided parallel to the light-emitting diodes. In particular, a switching element can be provided for each light-emitting diode.

The information about an emergency lighting operation and optionally a dimming information, which preferably represents a dimming value, can be supplied by the control unit by evaluating the electrical supply supplied to the LED illuminant section, ie in particular the supply voltage supplied by the AC / DC converter to the LED illuminant path , be determined. In particular, the control unit may, for example, detect a failure of the mains supply or a switching of the mains supply to an emergency power supply, and optionally evaluate a selective phase on / section or selectively rectify the supply voltage and then selectively turn on single, multiple or all light source strands by activating / deactivating the provided switching elements / or switch off and / or ein¬ individual of the LED bridge. Activation of a switching element is understood here as the switching of the switching element into the conducting state.

In particular, the supply voltage evaluated by the control unit can be a bus voltage, for example a voltage, which is fed to the illuminant section via a bus, for example from a DC bus, also called a DC bus ,

If an operation of the LED illuminant path directly to an AC / AC voltage supply, so the LED illuminant can be a rectifier vor¬ switched, which converts the AC voltage into a DC voltage. The rectifier can be designed as a full-wave rectifier or as a half-wave rectifier. However, it can also be provided to switch the light source chains anti- or counter-parallel, so that the LED light path can be supplied directly from an AC voltage, and thus a corresponding operation of the LED light path can also take place with an AC voltage supply. Preferably, each LED illuminant chain has an LED illuminant chain connected in opposition to it, so that pairs of the LED illuminant chains are present. Due to the counter-parallel arrangement of the LED lamps, alsoder LEDs, then for each half-wave of the AC power supply at least a portion of the LED lamp chains is active.

The control unit detects information about an emergency light operation based on the evaluation of the course of the mains voltage and optionally also a dimming information (a dimming signal) or determines this from the supplied supply voltage and activates / deactivates stepwise the LED Illuminant chains of the LED light path.

In particular, this switching on and off by switching elements / bridges, or. by switching off / connecting the supply paths to the LED lamp chains mit¬tels the switching elements. Depending on the power supply supplied to the control unit, or of the average power supply of the LED light path, the control unit can now connect or disconnect individual light emitting diodes in the LED light source chains by activating / deactivating one or more corresponding switching elements. This can be done selectively.

Depending on the information supplied via an emergency lighting operation and optionally a dimming information, one or more LED lighting means are then deactivated or activated by the control unit.

When the LED light source chains or light emitting diodes are arranged in a matrix structure, the control unit can activate / deactivate individual light emitting diodes in the LED light source chains, in particular when the LED light path is supplied from an AC voltage, depending on the detected voltage. Thus, in essence, light emitting diodes along an axis of the matrix, e.g. essentially LEDs in a LED Leuchtmittel¬ line, disabled or activated.

In essence, therefore, the preferably corresponding light-emitting diodes have the same coordinate in their spatial orientation, or an identical coordinate ratio (for example for diagonals).

Depending on the amplitude of the supply, which is detected by the control unit, one or more LED light-emitting lines can thus be deactivated or activated by the control unit.

By way of example, the LED illuminant path can be a converter, in particular an AC / DC converter (AC = AC voltage / current, DC = DC voltage / current, converter is converter for the conversion of AC voltage / current to DC voltage / current) be switched so that the LED illuminant chains of the LED illuminant section are not operated with Wech¬selstrom, but in particular with direct current.

The AC / DC converter used can likewise be set up to evaluate information about an emergency light operation and optionally a dimming control signal or else a emergency light situation based on a monitoring of the supply voltage. For example, the 50 or 60 Hz AC voltage present in normal operation can be switched to a rectified 100 or 120 Hz AC voltage (pulsating DC voltage) or a DC voltage in an emergency light output case. For example, an emergency mode operation may also be signaled via an interface.

Alternatively, the converter may also be designed as a so-called single-battery emergency light converter. The converter may have a rechargeable battery. Optionally, the converter may comprise a battery charging circuit and / or battery discharging circuit. The battery can be recharged in normal operation via the applied mains supply and in emergency mode, the converter, starting from the battery, can supply a DC voltage at the output to the LED module.

The dimming control signal may be, for example, a digital bus signal supplied via a wired or wireless bus, a phase gating signal, a phase section signal or a dimming control signal resulting from the evaluation of the supply voltage half-waves supplied to the converter.

When using the AC / DC converter thus controlling the LED lighting medium distance is done with DC voltage. A dimming information acquired and evaluated by the AC / DC converter can now be evaluated by the control unit in such a way that individual switching elements provided in the LED illuminant path are switched by the control unit, so that the detected dimming information is preferably used for the selective complete switching on and off of individual / several / all LED bulb chains can be done.

In the presence of the AC / DC converter, the information about a Notlicht¬ operation and optionally a dimming information, which preferably reproduces a dimming value, from the control unit by evaluating the supplied by the AC / DC converter of the LED Leuchtmittelstre¬cke electrical supply , So in particular the supplied from the AC / DC converter of the LED illuminant path supply voltage can be determined. In particular, in the presence of an AC / DC converter, the control unit may, for example, also evaluate an amplitude of the supply voltage and then selectively switch on and / or off individual, several or all light-source strands by activating / deactivating the intended switching elements. In this way, the brightness can be reduced in emergency mode operation by deactivating Einzel¬ner light sources strands or LED of a light source strand and thus the energy consumption can be reduced. Thus, for example, the charge of the battery can be used for a longer period of time for emergency lighting.

In the presence of an AC / DC converter, the supply voltage evaluated by the control unit may be a DC voltage output from the AC / DC converter.

1 shows by way of example an LED illuminant line LMS according to the invention.

Starting from an electrical supply V, LED illuminant chains LMK1, LMK2, LMK3 are operated. The LED lamp chains LMK1, LMK2, LMK3 are connected in parallel in the illustrated diagram and each have LED lamps L (that is, a light-emitting diode or LED). With the LEDs L switching elements S are connected in series and in parallel. The switching elements S parallel to the LEDs L serve on the one hand to bridge and therefore to deactivate a single LED L, while the switching elements S connected in series with the LEDs L can be used to couple out LEDs L from the respective LED lamp chain, to interrupt the supply path of an LED light source chain and thus to deactivate the LED light source chain. By way of example, the bypass switching elements parallel to the second LED illuminant chain LMK2 are designated by US2 in FIG. Analogously, US1 designates the bridging switching elements of a first LED illuminant chain LMK1 and US3 the bridging switching elements of a third LED illuminant chain LMK3. For example, individual light-emitting diodes L can be bridged and thus deactivated by the switching elements S parallel to the light-emitting diodes L, and in this way an LED illuminant line (ie, at the same level, quasi-parallel light-emitting diodes) can be bridged and thus deactivated. As an alternative to an LED luminous medium line, however, an LED illuminant diagonal can also be bridged and thus deactivated, for example. In principle, a light-emitting diode or an equal number of light-emitting diodes can be bridged and thus deactivated for each active LED illuminant chain in the event of a bridging and thus deactivation.

Further, a control unit SE is provided, e.g. an integrated circuit IC, an ASIC and / or a microcontroller, which is set up to deactivate and / or activate the switching elements S of the LED light path LMS, i. non-conductive or off and / or conductive or turn on. The control by the control unit SE is exempla¬ indicated by the dashed arrows in Fig. 1.

Further, the control unit SE is directly or indirectly connected to the electrical supply V connected. On the one hand, the control unit SE can on the one hand be supplied with electricity, on the other hand the control unit SE can evaluate the electrical supply and, on the basis of this evaluation, switch on and / or off at least one, preferably a plurality of the switching elements S. Thus, e.g. by turning off a switching element Sx and by turning on a switching element Sy a light emitting diode Lxy be disabled. If all the switching elements S connected in series with the light-emitting diode Lxy are activated, i. turned on, and only deactivates the switching element Sy, i. turned off, and at least one of the Überbrüεckungsschaltelemente US2 is further disabled. So the entire second LED illuminant chain LMK2 is deactivated. However, switching off the second LED illuminant chain LMK2 preferably takes place by deactivating the switching elements Syy and Sxx, as shown in FIG. 1. Preferably, the LED illuminant path LMS has a rectifier at its input, which is not shown in FIG. The rectifier can be designed as a full-wave rectifier or as a half-wave rectifier.

The rectifier can be arranged directly at the input of the LED light path LMS or after the connection of the control unit SE with the electrical supply V.

It is to be understood that the control of the remaining switching elements of the first and third LED illuminant chain LMK1, LMK3 and / or the associated bridging switching elements US1, US3 can be carried out analogously.

By the proper arrangement of the switching elements S, it is possible to produce in principle any combination of deactivated / activated light-emitting diodes L. Specifically, it is possible to completely deactivate each of the LED lamp chains LMK1, LMK2, LMK3.

2 shows by way of example an LED illuminant line LMS 'which essentially offers the same functionality as the LED illuminant line LMS shown in FIG. 1. The reference numerals are therefore identical to those of FIG. 1. Merely a second LED illuminant chain LMK2 'is now connected in parallel with the first LED illuminant chain LMK1 and the third LED illuminant chain LMK3. For ease of illustration, an unbalanced number of counterparallel LED light source chain is shown, preferably a symmetrical number of anti-parallel LED light source chains are selected. Also, an electrical supply V of the LED light path LMS 'is selected differently from the electrical supply V of the LED light path LMS.

For example, the electrical supply V may be a DC voltage / current supply while the electrical supply V may be an AC / current supply.

FIGS. 3a-c now show, by way of example and schematically, a possible use of the LED illuminant paths LMS, LMS 'from FIGS. 1 and 2.

FIGS. 3a-c show applications in which a dimmer 1 is fed from a mains supply 2. In particular, the dimmer 1 can be a triac or a phase on / off dimmer. Alternatively, a dimming control signal may also be supplied via a digital bus, or it may be a dimmer circuit that performs selective rectification, as described in DE 10 2011 089 833 A1.

The dimmer 1 acts on the electrical supply V, V of the LED Leuchtmittelstrecke LMS, LMS 'and changes them depending on a set on the dimmer dimming value. This dimming value indicates how the power of the LED light path LMS, LMS 'is to be changed.

An increase in the dimming value is usually intended to cause an increase in the emitted light output, e.g. a dimming value of 100% indicates that the LED Leuchtmitttelstrecke LMS, LMS 'should be operated at full power / brightness. By contrast, a reduction in the dimming value normally leads to a reduction in the light output or the brightness.

In Figs. 3a and 3b, an additional component is respectively arranged between the dimmer 1 and the LED illuminant link LMS.

In the case of FIG. 3 a, this is a converter 3, in particular an AC / DC converter, which on the one hand can rectify the electrical supply supplied by the dimmer 1 and, on the other hand, depends on a set dimming value, that is to say in particular on the basis of the power supplied to the dimmer 1, an output power and thus can adjust the electrical supply V of the LED light path LMS.

In this case, the converter 3 can evaluate the electric supply supplied to it by the dimmer 1 and determine a dimming information representing the dimming value set on the dimmer 1. For this purpose, the converter can have a corresponding evaluation circuit (IC, ASIC, microcontroller,...). The converter 3 can then transmit this dimming information by modulation of the electrical supply V to the control unit SE (not shown here) of the LED light path LMS or additionally, for example for special data, via a separate path (dashed arrow).

As described above, the control unit SE of the LED luminous line LMS can therefore evaluate the electrical supply V without detecting an additional information channel such as an additional data line in order to detect the dimming information and control the switching elements S accordingly.

The converter 3 and the LED light path LMS are preferably provided as separate components. The dashed box around these components indicates that the converter 3 and the LED light path LMS may be formed in an optional variant as an integrated component / integrated component. The converter 3 takes over the function of the control unit 5 in this example of FIG. 3 a, since it outputs information about an emergency light operation and optionally dimming information with the supply.

In Fig. 3b, a control unit 5 is present, which transmits information about a Notlicht¬ operation and optionally a dimming information to the supply. The supply of the information about an emergency light operation and optionally a dimming information is supplied to a rectifier 4, so that although a rectification takes place, but this supply still contains the information about an emergency light operation and optionally a Dimminfor¬mation. The control unit SE evaluates the electrical supply V to detect the information about an emergency light operation and optionally a dimming information. This example of Figure 3b is particularly suitable for the transmission of a selective Phasenan / -abschnitt dimming information from the control unit 5 to the LED light path LMS. The control unit 5 can recognize an emergency lighting situation based on the evaluation of the variation of the supply voltage (distinction to AC voltage, rectified AC voltage or DC voltage).

FIG. 3c now shows a direct operation of the LED illuminant line LMS 'on the control device 5, in which case an alternating voltage is present as the electrical supply V.

Consequently, the LED light path LMS 'essentially corresponds to that of FIG. 2 or, as explained in example 1, a rectifier is integrated at the input of the LED light path LMS.

Fig. 4a now shows an application of the arrangements of Figs. 3a and 3b in each case a retrofit lamp.

Here, the rectifier 4 is shown in a component 4, which should indicate that the rectifier 4 can be arranged in front of the LED light path LMS.

As an alternative to the retrofit lamp, the examples described below may also be applied to an LED lamp.

Fig. 4b shows an application of the arrangement of Fig. 3c, in which either the LED light source chains are arranged in opposite directions or a rectifier is integrated directly into the LED light path.

FIG. 5 shows by way of example an embodiment of the control unit 5. The control unit 5 can be connected upstream of a retrofit lamp, having an LED illuminant line LMS. Here, the mains supply 2 of the LED illuminant line LMS is supplied via the control unit 5 , The LED light path LMS is powered by the power supply 2 with power. The LED illuminant line LMS is preferably formed by the LED illuminant path LMS, LMS ', which may be preceded by the rectifier 4.

Preferably, the supply terminals of the retrofit lamp simultaneously form the interface to the control unit 5, as is the case, for example, with bulb sockets.

Connected to the control unit 5 or integrated in this are accessible from the outside power switch S and also accessible from the outside T button.

The button T, acts on two pairs of contacts Ta1 / Ta2 on the one hand and Tb1 / Tb2 on the other side, in opposite directions. This means that in the illustrated idle state of the pushbutton T, the first contact pair Ta1 / Ta2 is open and the second contact pair Tb1 / Tb2 is closed. If the pushbutton T is depressed against the force of a spring (not shown), the first contact pair Ta1 / Ta2 is opened, and the second contact pair Tb1 / Tb2 is closed.

The controller 5 further includes four rectifier diodes D1, D2, D3, D4. These are thus the two contact pairs Ta1, Ta2 and Tb1, Tb2 interconnected, that the load L at ge¬ closed power switch S and not pressed button T the mains voltage half-waves are as shown, as shown in Fig. 6a, so with alternating polarity.

Fig. 6b shows the case where the power switch S is closed at time t1 and the button T is pressed a little later at time t2. At time t3, the switching operation is completed.

For the switching, the contact pairs Ta1 / Ta2, on the one hand, and the contact pairs Tb1 / Tb2, on the other hand, require a certain, albeit short, time in which the mains voltage is interrupted. However, this break is so short that it can be buffered away. The representation of the power interruption in FIG. 6b is not to scale and, in conjunction with the basic mode of operation of the control unit 5, is also of subordinate importance.

At time t4, the button T is released again. From t3 to t4 mains voltage halfwaves of the same polarity are now supplied to the load.

After the release of the button T at the time t4, a short interruption of the mains voltage due to the switching over of the pairs of contacts Ta1 / Ta2 on the one hand and Tb1 / Tb2 on the other hand follows again. From time t5 the mains voltage half-waves are again supplied to the load with the polarity predetermined by the network N to the load L, ie with alternating polarity.

The total temporal length tges = t4-t3 of the series of mains voltage half-waves with the same polarity which can be determined by means of the pushbutton T determines the degree of influencing or changing of a parameter of the load L. In the concrete case, the parameter is the dimming degree or the brightness of the retrofit led lamp.

It is understood that by reversing the circuit arrangement of the rectifier diodes D1 to D4, it is also possible to reverse the polarity of the mains voltage half-waves between the times t3 and t4. Here, therefore, there is an additional degree of freedom for the control information to be transmitted, which can be used, for example, for adjusting the color of the lamp to be controlled. A further possibility for the transmission of additional control information consists in repeating the sequence of mains half-waves with the same polarity, namely with a specific repetition rate.

It is possible to design the circuit arrangement in such a way that mains voltage half-waves of different, i. opposite, polarity can be generated. The polarity of the mains halfwaves may then be used, for example, to encode information.

For example, the dimming direction of a dimming operation of the light source can be predetermined by the polarity of a series of mains half-waves of the same polarity. For example, successive mains half-waves of a first polarity may cause dimming levels of higher brightness, while successive mains voltage tap waves of a second, reverse polarity may cause dimming levels of lower brightness. Thus, the first polarity causes upward dimming, the second polarity causes downward dimming of a dimmable light source.

The upward or downward dimming can take place continuously and is continued, for example, as long as successive mains half-waves of equal polarity are generated. Continuously may mean that for each predetermined number of successive mains half-waves of the same polarity, the degree of dimming is increased or decreased by a smallest possible dimming level. The more mains voltage halfwaves of the same polarity follow each other, the more the degree of dimming will be changed upwards or downwards.

A certain number of mains half-waves of the same polarity may also be required initially in order to be able to carry out an upward or a downward dimming at all, that is to say a kind of start signal.

Also conceivable are more complex coding schemes, wherein control information about the number or the specific sequence of mains half-waves of the same or different polarity is transmitted. For example, a first predetermined number of mains half-waves of the same polarity or a first series of alternating-current mains voltage half waves may activate an upward dimming, another number or another sequence may activate a downward dimming.

In particular, dimming jumps can also be coded by a specific number or a certain sequence of polarities of mains voltage half-waves or such a dimming jump can thereby be triggered. For example, a predetermined combination of polarities of mains half-waves could cause a non-continuous change in the degree of dimming by a first predetermined value. A second predetermined combination of polarities, on the other hand, could cause a non-continuous change in the degree of dimming to a second predetermined value. Another way to exploit the different polarities of mains half-waves is to set a dimming speed. Thus, for example, initially a first sequence or number of polarities of mains voltage half-waves could determine whether in the following an upward dimming or a downward dimming should be performed.

Thereafter, for example, mains voltage half-waves of a first polarity could slow down a faster dimming process, and network voltage waves of a second polarity could slow down

Dimming process. It is also conceivable to specify a particular sequence of polarities of mains half-waves which alters the dimming speed during a dimming operation. For example, a given first sequence could increase the dimming speed by a certain percentage or absolute amount, a second predetermined sequence could decrease the dimming speed by a certain percentage or absolute amount.

It is also possible to use complex sequences or patterns of line voltage half-waves or polarities of line voltage half-waves to alter or configure other operating parameters than the brightness of a light source. An example is the color or color temperature of the light source. Another example would be an adjustment of whether the light is emitted continuously or pulsed from the light source. It would also be possible to program an automatic switch-off of the light source after a predetermined operating time by the control information thus transmitted or to program an automatic switch-on, for example after a predetermined period of time. The pushbutton T is only an example of a signal generator which can be actuated manually (for example also a switch, rotary dimmer, etc.) or receives non-manual control signals at an interface or generates this itself (eg sensor, such as daylight sensor, color sensor) Etc.).

Instead of a button, a relay can also be used, which is triggered, for example, by a button.

The example of FIGS. 5 and 6 is an exemplary embodiment of the invention, by way of example explained how the information about an emergency light operation andoptionally modulated dimming information on the supply and thus can be supplied via the supply of the light source.

As already explained, in an alternative variant or else in a combination, a selective phase on / section can be used to transmit the dimming information via the supply and, in addition, a detection of an emergency light operation can take place. For example, the controller 5 may perform a phase gate or phase section for a predetermined period of time or number of times, and the time period or number may be read out as a dimensional information.

The coded by the control unit 5 information (information about a Notlicht¬ operation and optional dimming information) are then preferably evaluated by the control unit SE of the LED light path LMS, LMS 'and transmitted to the LED light path LMS, LMS'.

Claims (16)

Claims 1. LED illuminant path (LMS, LMS ') for an emergency light operation with an LED luminous medium chain or at least two parallel and / or counterparallel connected LED light source chains (LMK1, LMK2, LMK3) each having at least one light emitting diode (L), wherein the LED illuminant path (LMS, LMS ') has a control unit (SE) and is supplied via a supply (V) which is adapted to receive and supply via the supply (V) information about emergency lighting operation and optionally dimming information from the supplied information about an emergency lighting operation andoptional dimming information and for their implementation stepwise switching on and / or off individual of the parallel / counter parallel LED light source chains (LMK1, LMK2, LMK3) and / or individual LEDs of a light source chain (LMK1, LMK2, LMK3 ) to bridge. 2. LED illuminant path according to claim 1, wherein at least one light-emitting diode (L) of the LED light path (LMS, LMS ') can be bridged by at least one switching element (S) which is provided in parallel and can be switched by the control unit (SE), wherein the control unit (SE) is arranged to activate or deactivate the switching elements (S), in particular in dependence on an electrical supply (V) of the LED light-emitting means path (LMS, LMS '). 3. LED illuminant path according to claim 1 or 2, wherein the electrical supply (V) of the LED illuminant path (LMS, LMS ') is an AC voltage or a DC voltage. 4. LED light path according to one of the preceding claims, wherein a converter (3) is adapted to convert an AC voltage into a DC voltage and to provide the DC voltage as electrical supply (V) of the LED light path (LMS, LMS '). 5. LED illuminant path according to one of the preceding claims, wherein the LED illuminant path (LMS, LMS ') has counterparallel switched light source chains (LMK1, LMK2, LMK3) and is operable directly from an AC voltage. 6. LED light path according to one of the preceding claims, wherein the LED light path (LMS, LMS ') connected in parallel light source chains (LMK1, LMK2, LMK3), which a rectifier (4) is connected upstream and directly from ei¬ner AC voltage is operable. 7. LED luminous means according to one of the preceding claims, wherein the control unit (SE) is adapted, depending on the electrical supply (V) of the LED Leucht¬mittelstrecke (LMS, LMS ') individual LEDs in the LED light source chains (LMK1 , LMK2, LMK3) by activating or deactivating the switching elements (S) on and off, and in particular light-emitting diodes (L) in different LED illuminant chains (LMK1, LMK2, LMK3) substantially a coordinate in their spatial Alignment. 8. LED illuminant path according to claim 4, wherein the converter (3) is adapted to change one of the LED illuminant line (LMS, LMS ') supplied electrical supply (V) depending on a detection of an emergency light situation. 9. Dimmable LED light path according to claim 8, wherein the converter has a rechargeable battery and is adapted to output when detecting an emergency light situation, preferably in case of failure of the power supply, fed by the battery Gleichspan-nung. 10. LED illuminant path according to one of the preceding claims, wherein the control unit (SE) is adapted to, by evaluating the electrical supply (V), in particular a change in the electrical supply (V), the information about a Notlichtbe¬trieb and the optional dimming information capture. 11. LED illuminant path according to one of the preceding claims, wherein the electrical supply (V) is a DC voltage and the information about an emergency light operation and the optional dimming information, an amplitude / amplitude change of the electrical Ver¬Sorgung (V). 12. LED illuminant path according to one of the preceding claims, wherein the light-emitting diodes (L) and the switching elements (S) are arranged for bridging in a matrix structure, wherein in each LED illuminant row at least one light emitting diode (L) can be bridged and in each LED illuminant chain (LMK1, LMK2, LMK3) at least one of the control unit (SE) switchable switching element (S) is provided, which is adapted to the respective LED light source chain (LMK1, LMK2, LMK3) on or off. 13. LED lamp comprising an LED light path (LMS, LMS ') according to one of the preceding claims. 14. Retrofit lamp comprising an LED light path (LMS, LMS ') according to one of claims 1 to 12. An integrated control unit configured for an LED illuminant line (LMS, LMS ') according to any one of claims 1 to 12. 16. A method for controlling an LED light path (LMS, LMS ') for a Notlicht¬ operation with an LED light source chain or at least two parallel and / or gegenpa¬rallel connected LED light source chains (LMK1, LMK2, LMK3) each having we¬ at least one light emitting diode (L), wherein the LED light path is fed via a supply (V), wherein a control unit (SE) of the LED light path (LMS, LMS ') via the supply (V) supplied information about an emergency light operation and detects an optional dimming information and, depending on the detected information about emergency lighting operation and the optional dimming information and its implementation, stepwise switches on and / or off individual of the parallel / opposite parallel LED light source chains (LMK1, LMK2, LMK3) and / or individual LED of a light source chain ( LMK1, LMK2, LMK3). For this 6 sheets of drawings