GB2565600A

GB2565600A - Emergency lighting driver arrangement, lighting module and system

Info

Publication number: GB2565600A
Application number: GB1713359.6A
Authority: GB
Inventors: Dixon David
Original assignee: Tridonic GmbH and Co KG
Current assignee: Tridonic GmbH and Co KG
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2019-02-20
Anticipated expiration: 2037-08-14
Also published as: GB2565600B

Abstract

A driver arrangement 20 for an emergency lighting system includes a main driver device 2, an emergency driver device 5 and a lighting module 3. The emergency driver device is designed for driving the lighting module from an energy storage unit, such as a battery 4, and comprises a lighting module interface with a first terminal 6.1 for connection to the lighting module. The main driver device drives the lighting module from a mains supply 11 and is connected to the lighting module at a second terminal 6.2. The lighting module includes a first light emitting diode (LED) arrangement 3.1 connected between the first terminal and a common terminal 6.3 in series with a second LED arrangement 3.2 connected between the second terminal and the first terminal such that the first terminal is blocked from the second terminal by the second LED arrangement of the lighting module when the emergency driver is driving the first LED arrangement of the lighting module.

Description

Emergency Lighting Driver Arrangement* Lighting Module and System

The invention is in the field of electric converters* in particular electric converters for driving lighting modules in a battery-backed mode of operation. The invention encompasses a driver device arrangement, a lighting module and a lighting system comprising the driver device 10 arrangement driving the Lighting module.

Au emergency light is required to provide illumination when the power provided by regular power supply such as mains supply fails. The emergency light requires some sort of energy storage unit* for example a battery, preferably a rechargeable battery feat provides electrical energy to the light, during a mains failure.

An emergency lighting system uses battery-backed lighting modules that switch to a battery energized mode automatically when a power outage is detected.

In the area of emergency lighting systems, the term “maintained” is used to denote a mode of operation for an emergency lighting luminary. A maintained luminary is a Luminary in which the emergency lamps are lit all the time, in. case of normal operation from mains supply and in case 20 of mains failure from the battery. For example, a maintained mode may be employed in. a place such as a theatre or cinema. The lights are typically dimmed when the place is used, and the emergency lighting prevents total darkness* for example in order to illuminate escape routes, The lamps of the emergency luminary are driven from a battery in case of a mains power failure using an emergency driver device including suitable converter circuitry for generating a load 25 current for driving the lamps.

Known battery backed emergency driver devices for emergency lighting applications are adapted to be installed within or adjacent to standard lighting fixtures. Upon, sensing power loss, the emergency driver devices switch into emergency mode turning the existing lighting modules into emergency lighting modules. Therefore, both the requirements for standard lighting and the 3Q emergency lighting without the need of wiring separate electric circuits or external wall mounts for lighting modules for normal lighting and for emergency lighting are met.

.Modem emergency lighting systems operate with relatively low voltages, for example in voltage ranges from 2-12 volts. These low voltages both reduce the size of the required batteries and reduce the load on a converter circuit, which, drives the emergency light in the emergency operational mode.

A driver device uses a converter circuit to step-down the voltage from mains supply to the low voltage required by the lighting modules in order to supply light emitting diodes (LEDs) with electric energy in a maintained mode. In such maintained mode, the LEDs of a lighting module are turned on even when there is no power failure. Then, the LEDs are driven by a standard driver device including a converter circuit and supplied by standard mains supply.

w The emergency driver device monitors mains supply and switches an emergency converter circuit to drive the lighting module in case a mains failure is detected. The emergency driver device accordingly comprises relays to switch the lighting device frtim being driven by the standard driver device to being driven by the emergency driver device with its emergency converter circuit. These relays ensure isolation between the standard converter circuit on the one 15 hand and the emergency converter circuit on the other hand.

However, these relays usually forming part of the emergency driver device are bulky elements, which require a significant amount of space in the emergency driver device and cause cost in procuring the relays as well as designing and manufacturing of the emergency driver device.

The invention addresses the drawbacks of the known emergency driver device, in particular the technical problem of reducing the complexity, the space requirements as well as the costs.

The technical problem is solved by the driver device arrangement according to claim 1 and the lighting module and the lighting system according the corresponding independent claims.

Further advantageous embodiments are claimed in the dependent claims.

The invention relates to a driver device arrangement comprising an emergency driver device for driving a lighting module from an energy storage unit, the emergency driver device comprising a lighting module interface with a first terminal for connecting at least one first light emitting element of the lighting module with the emergency driver device, and

A standard driver device for driving the lighting module from a mains supply, wherein the lighting module interface comprises a second terminal for connecting at least a second light ^emitting element of the lighting module with the standard driver device, where the second terminal is blocked from the first terminal by the at least second light emitting element of the light lighting module, when the emergency driver device is driving the at least one first lighting diode of the lighting module.

The driver device arrangement solves the technical problem by the driver device arrangement comprising a first converter circuit of the emergency driver device for driving a lighting module from the energy storage unit and the lighting module interface with the first terminal for connecting at least the lighting module. The driver device arrangement is characterized in that the first terminal is blocked from a second terminal for connecting the lighting module with a 10 standard converter circuit of the standard driver device.

By blocking the first terminal for connecting the lighting module from the second terminal and thus the standard converter circuit, relays as used to this same purpose in the known driver device become redundant and need not be inchided in the driver arrangement according to the invention. Accordingly, manufacturing costs are reduced and the required space for those relays 15 is not necessary any more. The driver arrangement according to the invention is accordingly cost effective without reducing the electric isolation and blocking properties between the first converter circuit and the standard, converter circuit

Permanently electrically blocked means that there exists no electrically conducting connection between the first terminal and the second terminal within the driver device arrangement, so encompassing al so that there exists no switchable electri cal connection between the first terminal and the second terminal.

Permanently isolating or permanently blocking the first connector from the standard converter circuit, may be implemented by using separate terminals in the interface, one first terminal for connecting the first converter circuit for driving the lighting module in a first (emergency) 25 operating mode and one (second) terminal for connecting the standard converter circuit to the lighting module in a second (standard) operating mode. Thus, simple passive electric Components in the driver device arrangement are used for ensuring electric isolation of the first and the standard converter circuit The complexity and the cost of the driver arrangement are respectively reduced over prior art

The driver device arrangement according to a further advantageous embodiment has at least one energy storage unit, in particular a rechargeable battery.

The invention is particularly advantageous when the driver device arrangement also includes a ' battery or is at least co-Iocaied with a battery. In case of an emergency lighting system for a building, many dri ver devices are distributed over the entire building. In. case each driver device arrangement comprises or is at least directly connected to a battery arranged at a same location, 5 the requirement of electric isolation between an emergency driver device and its battery Oh one hand and the faulty mains driven standard driver device is to be ensured for each emergency driver device. Therefore, the advantageous cost effects of the inventive driver device arrangement are scaled up by the plurality of driver device arrangements over the entire building, reap, emergency lighting system.

Moreover, in case of upgrading the building with an emergency lighting capability for its lighting system, distributed batteries are needed to be connected with the individual emergency driver devices. A separate wiring of the driver device arrangements for the emergency operational mode to a central energy storage unit extending over the entire building or at least portions thereof, for example each floor, in order to connect the energy storage unit with the emergency driver devices is not required.

The driver device arrangement may comprise a third terminal of the emergency driver device, which is connected with the lighting module and additionally the same third terminal may be connected with the standard driver device.

At least a second light emitting element of the lighting module may act as a blocking diode when 20 voltage is applied from the emergency driver device to the first terminal for connecting at least one first light emitting element of the lighting module.

An embodiment of the driver device arrangement comprises the standard converter circuit configured to drive the lighting module from mains supply.

When the standard converter circuit, for example arranged in a standard driver device operating from mains supply, is blocked and isolated by the cost effective approach from the portion of the /

emergency 1 ΐ ghting system driving the fighting module in case of a mains supply failure, safety is ensured without requiring additional relays for separating the first converter circuit and the standard converter circuit

An embodiment of the driver device arrangement includes the standard converter circuit configured to drive the fighting module in a standard operational mode.

' The driver device arrangement according to an embodiment shows the emergency driver device with the first converter circuit configured to drive the lighting module in an emergency operational mode.

An emergency operational mode is activated in response to a malfunction in the general, artificial 5 lighting and/or feilure of the mains supply. Emergency lighting cavers safety lighting for escape routes, anti-panic lighting and safety lighting for hazardous workplaces. The driver device arrangement is particularly suited to operate the lighting module in a maintained mode, for example upgrading a normal artificial lighting system with its existing lighting modules including LEDs with an emergency lighting capability for driving a part of the LEDs in case of a 10 mains supply failure based on energy drawn from an energy storage unit.

The technical problem is also addressed by a lighting module, which comprises at least one first light emitting element and at least one second light emitting element, and an. interface for connecting the lighting module to a driver device arrangement for driving the lighting module. The lighting module is characterized in that the lighting module arranges the first light emitting 15 element and the second light emitting element in a series connection, that the interface comprises a first terminal and a second terminal, wherein, the at least one second light emitting element is electrically arranged between a first terminal and a second terminal.

In an embodiment of the lighting module, the at least one first light emitting element and the at least one second light emitting element each are a group comprising a series of light emitting diodes. The groups may have different amounts of light emitting diodes so that a dimming effect for the emergency operation is achieved according to the numbers of diodes in the different groups.

The second terminal may be blocked from the first terminal by the at least one second light emitting element of the lighting module.

The technical problem is also addressed by a lighting system, comprising at least one driver device arrangement according to one of the previously discussed embodiments connected for driving at least one lighting module according to one of previously discussed embodiments.

The driver device arrangement may comprise an emergency LED driver.

The lighting module may comprise a plurality of light emitting diodes (LEDs) as light emitting 30 elements, foe LEDs being at least partially arranged in a series connection.

*

The lighting system may be an emergency lighting system for operation in. a maintained mode.

The description of an embodiment of the invention refers to the enclosed drawings in which

Fig. 1

Fig.2 provides a general overview of major elements of a driver device arrangement according to an embodiment in an emergency lighting application, and is a general, overview of major elements of an emergency lighting system including a driver device according to prior art.

In the figures, same numerals denote same or corresponding elements. For sake of conciseness, the description of the figures onrits repeating the description of same reference signs in different figures.

Fig. 1 provides a general overview of major dements of a driver device arrangement 20 so including a lighting module 3 according to an embodiment. For sake of clarity and conciseness, those structures of the depicted preferred embodiment of the driver device arrangement 20 corresponding to respective structural elements in a known emergency driver device 12 are discussed with reference to fig.2 first

In fig. 2 an emergency lighting system includes a driver device 2 (standard driver device) and an 15 emergency driver device 12 according to prior art The standard driver device 2 is fed from a mains supply 11 with an AC voltage at a line connection L, a neutral connection N. A protective earth connection PE is not shown in fig. 2, but usually will be also present.

The standard driver device 2 includes a converter circuit 2.1 (standard converter circuit) and provides a load current for driving LED modules 13,14,15 and 16. The LED modules 13,14, so 15,16 are arranged in series in fig. 2. Each LED module 13,14,15,16 includes one or more light emitting diodes (LED), which may be arranged in a series and/or a parallel circuit arrangement or a combination of a series and parallel circuit arrangement. The circuit arrangement of fig. 2 is an emergency lighting system in a maintained mode of operation, which means that all LED modules 13,14,15,16 emit light in a standard operation mode driven by the 25 - standard driver device 2 from mains supply 11. The standard driver device 2 comprises at least one converter circuit (standard converter circuit 2.1) for providing the load current to drive the LED modules 13,14,15,16 in the standard operational mode.

In case Of a mains supply malfunction (power failure), the emergency driver device 12 drives the LED module 15 (EM LED module) only witii electric energy drawn from an energy storage no it ,4. The emergency driver device 12 comprises at least one converter circuit 24 (first converter circuit) for providing tbe load current to drive the LED module 15.

The emergency driver device 12 according to the state of the art comprises a. first relay 17.1 and a second relay 17.2 in order to switch over the LED module 15 from being driven, by the standard driver device 2 in the standard operational mode to being driven by the first converter circuit 24 of the emergency driver device 12 in the emergency operational mode.

A possible specific structure the emergency driver device 12 is shown, in published patent document GB 2519718 B, which is herewith incorporated by reference. These general characteristics of the emergency driver device 12 as shown in patent document GB 2519718 B io can also be appli ed in case of the inventive emergency driver device 1 as shown in fig. 1.

Fig. 2 dispenses with showing control circuitry, for example implemented by a microcontroller or ASIC. Such control circuitry is for example required for monitoring the mains supply 1J and also for providing driving signals for the first and second relays 17.1,17.2 for switching from a first state in the standard operational mode to a second state for the emergency operational mode.

Tn addition such control circuitry can be used to control the operation of the LED module 15 from the energy storage unit 4 as well as the re-charge of the energy storage unit 4 when mains supply 11 is present.

Fig. 2 depicts the emergency LED module 15 as being arranged as the second LED module in the series arrangement of LED modules 13,14,15,16 counted from a ground connection, in particular a terminal of the standard driver device 2. Any other or even plural of the LED modules 15 may be energized in an emergency mode of operation.

Fig. 2 as well as fig. 1 omits other elements of the standard driver device 2 and the emergency driver device 12 or emergency driver device 1 with converter circuitry 5, which are not essential for understanding the invention.

Typically, the AC voltage from die mains supply 11 is provided to an EMI circuit tn either of the standard driver device 2, converter circuitry 5 and the emergency driver 12. The EMI circuit is adapted to address requirements of electromagnetic interference (EMI, sometimes also termed radio frequency interference RFI), for example suppressing any disturbances that affect an electric circuit due to either electromagnetic conduction or electromagnetic radiation emitted 30 from external sources.

, Typically, a rectifier circuit not shown in figs. 1 and 2 is arranged after the EMI circuit. Preferably there is subsequent to the rectifier circuit a power factor correction circuit in order to convert the AC voltage from mains to DC voltage for further processing. The power factor correction circuit is adapted to shape an input current drawn by the standard driver device 2, converter circuitry 5 and the emergency driver device 12 and from the mains supply 11 to be in synchronization with the mains voltage in order to maximize the real power drawn from mains supply.

The converter circuitry 5 may comprise a second converter circuit 25 and, a first converter circuit 24, each for example a flyback converter or another converter comprising at least one io transformer. The second converter circuit 25 may act as a power factor correction circuit. The second converter circuit 25 may generate a suitable voltage to charge the energy storage unit 4. The first converter circuit 24 may generate a suitable voltage and/or current for driving the load, in particular one or more lighting modules, for example LED modules 13,14,15 and 16 in fig. 2 or the lighting module 3 in fig. 1 as explained later.

A controller IC may control the load current provided by the first converter circuit 24 and the second converter circuit 25 in each of the emergency driver device 1, the emergency driver device 12 and the standard driver device 2. The controller IC can be an application specific integrated circuit (ASIC) or a microcontroller.

The emergency driver device 12 can be adapted to provide d load current with a predetermined ' current value to the LED modules 13,14,15,16. The load current value may be selectable. A current selector, for example an interface for accommodating one out of plural resistors with different values, or a dedicated programming interface may be used to select one out of plural possible load current values. The emergency driver device 1 fulfills a corresponding functionality.

The first converter circuit 24 and the second converter circuit 24 additionally provide an isolation barrier by galvanic isolation between inputs from outputs each of the first converter circuit 24 and the second converter circuit 25, for example by a using a transformer of a flyback converter circuit topology.

An embodiment of the invention is now discussed with reference to fig. 1. The driver device arrangement 20 may comprise an. emergency driver device 1 for driving one or more lighting modul es 3 as a load.

The emergency driver device 1 comprises a lighting interface 6 for connecting to a Lighting module 3 and further interface 18 for connecting to a standard driver device 2, a mams supply 11 and an energy storage unit 4.

In the standard operational mode the AC mains supply voltage is present at the input of the mains supply terminals of the standard driver device 2. The standard driver device 2 including a standard converter circuit 2.1 powers the LED module 3 in a so called maintained mode, which means that the lighting module 3 is powered in a standard mode of operation by the driver device 2 including the standard converter circuit 2.1 with energy drawn from the mains supply 11.

In the standard operational mode the AC mains supply voltage is also present at the input of the io mains supply terminals 9.1,9.2 of the driver device arrangement 1, in particular its further interface 18. The first converter circuit 25 acts as battery charger circuit generating a battery charging current and provides the battery charging current via battery terminals 8.1, 8.2 to the energy storage unit 4. The energy storage unit 4 is preferably a rechargeable battery which is either connected with the driver device arrangement 20 or included in the driver device arrangement 20.

In an emergency mode of operation the second converter circuit 24 dr aws electrical energy from the energy storage unit 4 via the battery terminal s 8.1,8.2 of the further interface 18 and the second converter circuit 24 provides a current for driving the lighting module 3 with an emergency load current of a predetermined current value for a predetermined minimum time period. This means that the second converter circuit 24 acts as a battery discharging circuit and thus acts in a battery-discharging mode of operation during an emergency mode of operation. The emergency load current value may be selectable, for example via a select interface not shown in figs. 1 and 2, in order to ensure a predetermined light level for a predetermined time duration, for example a regulatory minimum time.

The first converter circuit 24, for example a flyback converter or another topology comprising an transformer, and the second converter circuit 25, for example a flyback converter or another topology comprising an transformer, may simultaneously perform the function of a SELV element (safety extra low voltage element) for maintaining galvanic isolation between a mains supply side, the energy storage unit 4 and a load side of the driver device arrangement 20.

The first converter circuit 24, standard converter circuit 2.1 and second converter circuit 25 each may include a switch, which is controlled by a controller integrated circuit (IC).

In an emergency mode of operation, the emergency driver device 1 with, a first converter circuit * 24 drives the fighting module 3 from electrical energy drawn from the energy storage unit 4.

In particular, in an emergency mode of operation, the second converter circuit 24 provides a load current to the first light emitting element 3.1 of the lighting module 3. via the lighting interface 6, 5 more precisely a first terminal 6.1 and a third terminal 6.3 of the lighting interface 6 and the first terminal 7.1 and the third terminal 7.3 of the lighting module 3.

The first light emitting element 3.1 may comprise one or more light emitting diodes (LEDs).

In the emergency mode of operation, the second light emitting element 3.2 of the lighting module 3 acts as blocking means, preferably as an isolation barrier, for blocking and thus io electrically isolating the first terminal 7.1 and the second terminal 7.2 of the lighting module 3.

Electrically isolating means that a minimum resistance value is exceeded for an electric resistance between the first terminal 7.1 and the second, terminal Ί 2. Electrically isolating means that the electric conductivity for a predetermined voltage value (difference in electric potential) between the first terminal 7.1 and the second terminal 7.2 is negligible, close to zero or equal zero. When the emergency driver device 1 is driving the at least one first light emitting diode 3.1 of the lighting module 3 a voltage is applied to the first terminal 6.1 of the fighting interface 6 connected to the first terminal 7.1 of the lighting module 3. Thus, the second terminal 7.2 of the lighting module 3 is blocked from the first terminal 7.1 by at least the second light emitting diode 32 of the lighting module 3 as the voltage on the first terminal 6.1 exceeds the voltage at so the second terminal 6.2 as the standard driver device 2 is not supplying a voltage to the lighting module 3.

Accordingly, in the emergency mode of operation, the second terminal 6.2 of the lighting interface 6 connected to the second terminal 7.2 of the lighting module 3 is blocked and thus electrically isolated from the first terminal 6.1 of the lighting interface 6 connected, to the first 25 terminal 7.1 of the lighting module 3.

In standard mode of operation, the standard driver device 2, in particular its standard converter circuit 2.1 provides a load current to the second light emitting element 3.2 via the lighting interface 6, more precisely via a terminal 10.1 of a further interface 18 of the emergency driver device 1, via a second terminal 6.2 of the lighting interface 6 and via a second terminal 7.2 of the 30 lighting module 3, via the third tenninal 63 of the lighting interface 6 and via the second terminal 10.2 of the further interface 18.

The second light emitting element 3.2 may comprise one or more LEDs as light emitting . elements. A number of LEDs of the first light emitting element 3.1 and a number of LEDs of the second light emitting element 3.2 may be equal or may differ. In a particularly advantageous embodiment the number of LEDs of the second light emitting element 3.2 is larger than a number of LEDs of the first light emitting element 3.1. Thus, the electric isolation provided by the LEDs connected in series in the second light emitting element 3.2 is advantageously increased, whereas the required load current flowing over die first light emitting element 3.1 can be adapted to the usually reduced required emitted light in the emergency mode of operation. Thus, the electric energy stored in the energy storage unit 4 is efficiently used for providing a io specified minimum emergency light level over an extended time period.

The lighting module 3 as shown in fig. 1 includes a single string of LEDs arranged in a series connection. The invention is not limited to the shown arrangement For example, the lighting module 3 may include multiple strings of LEDs in series connection and in parallel connection in combination.

The inventive lighting module 3 requires an arrangement of the LEDs of the lighting module 3 to enable to distribute the LEDs into a first light emitting element 3.1 and a second, light emitting element 3.2, which are electrically connected in series to each other, so that a first terminal 7.1 of the lighting module 3 is directly connected with an anode of a LED of the first light emitting element 3.1. A cathode of an LED of the second light emitting element 3.2 is simultaneously

2o directly connected with the first terminal 7.1 of the lighting element 3. The second terminal 12 of the lighting element 3 is connected to an anode of a LED of the second light emitting element 3.2, so that the second light emitting element 3.2 guaranties electric isolation from the first terminal 7.1 of the lighting module 3 to the second terminal 7.2 of the lighting module 3.

The first light emitting element 3.1 of the lighting device 3 comprises those light emitting diodes which are electrically arranged between the first terminal 7.1 and a third terminal 73 of the lighting element 3. The third terminal 7.3 of the lighting element is connected with the third terminal 6.3 of the lighting interface 6. The third terminal of the lighting interface 6 is furthermore electrically connected to the terminal 10.2 of the further interface 18, the terminal 10.2 connecting the standard driver device 2.

When comparing the diagrams of fig. 1 and fig. 2, it becomes immediately apparent that the inventive emergency driver device arrangement 20 and lighting module 3 enable to simplify the emergency driver device arrangement 1 when compared to the known emergency driver device . 12. In particular, the relays 17.1,17.2 of the emergency driver device 12 and the respective relay controlling circuitry are not required. Complexity and involved costs are significantly reduced for the inventive emergency driver device 1. This is particularly important for products such as driver devices which are produced and marketed in large numbers.

The emergency driver device arrangement 20 according to the embodiment shows the advantages of the inventive approach, which are achieved at acceptable drawbacks. In particular, the driver device arrangement 20 provides energy to the lighting module 3 without incurring additional cost for the separate relays 17.1,17.2 and their corresponding switch control circuitry. The driver device arrangement 20 according to the embodiment provides electric isolation io between the standard converter circuit 2.1 for driving the lighting module 3 in a standard operation mode and the emergency converter circuit 24 for driving an emergency portion of the lighting module 3 by the first lighting element 3.1, for example one or more LEDs. The other portion of the lighting module 3, namely the second light emitting element 3.2 acts in conjunction with the second converter circuit 24 as blocking element and as an isolation barrier for isolating the energy storage unit 4 from the standard driver device 2 with its standard converter circuit 2.1.

Thus, the relays 17.1,17.2 may be dispensed with in the emergency driver device arrangement 20 according to the embodiment This reduces the required space for the electric components of the emergency driver device arrangement 20 considerably, as a control circuit for the relays 17.1, ao 17.2 is also not required. Apart from the required space, the costs for the emergency driver device arrangement 20 according to the invention are therefore also advantageously low.

An embodiment of the invention is described with reference to fi gs. 1 and 2 by referring to a maintained emergency luminary and a respective emergency lighting system.

The inventive approach is particularly advantageous for upgrading an existing lighting system 25 -with an emergency lighting capability suitable for maintained mode of operation.

When upgrading a lighting system with an emergency lighting capability for maintained lighting operation according to fig. 2, a sequence of steps has to be performed. An emergency LED module 15 needs to be identified in a first step, in a second step wiring for connecting the emergency LED module 15 to a preceding LED module 14 and a subsequent LED module 16 are 30 to be splitted and then wired to the corresponding terminals of an additi onal emergency driver module 12.

¹ For adding the emergency driver device 1 to a lighting module 3 according to the invention and a standard driver device 2, connecting the first terminal 7.1 of the lighting module 3 with the first terminal 6.1 of the lighting interface 6 of the emergency driver device 1 suffices. A splitting of connections for inserting the relays 17.1,17.2 into the serially connected string of LED modules

13,14,15,16 is not necessary in case of the invention. Accordingly, the invention is particularly suitable for refitting an emergency lighting capability into an installed lighting system by adding the emergency driver device 1 to the lighting module 3. This applies in particular for an emergency lighting system with a locally arranged energy storage unit 4.

A locally arranged energy storage unit 4 is an energy storage unit 4, which is co-Located with the io emergency driver device arrangement 20 and accordingly requires no additional power supply network adapted to provide power in case of the emergency case of operation. Such an additional backbone supply network would be necessary in case of fitting an emergency lighting capability with a centralized energy storage unit 4 for an entire premise or at least a floor or a group of emergency driver devices 1.

Claims

1. Driver device arrangement, comprising an emergency driver device (1) for driving a lighting module (3) from an energy storage unit (4) with a lighting module interface (6) with a first terminal (6.1) for connecting at least one io first light emitting diode (3.1) of the lighting module (3) with the emergency driver device (1), and a standard driver device (2) for driving the lighting module (3) from, a mains supply, wherein the lighting module interface (6) comprises a second terminal (6.2) for connecting at least one second light emitting diode (3.2) of the lighting module (3) with the standard driver 15 device (2), characterized in that the second terminal (6.2) is blocked from the first terminal (6.1) by the at least one second light emitting diode (3.2) ofthe lighting module (3) when the emergency driver device (1) is driving the at least one first light emitting diode (3.1) of tire lighting module (3).

2. Driver device arrangement according to claim I, characterized in that the driver device arrangement comprises at least one energy storage unit (4), in particular a rechargeable battery.

=5

3. Driver device arrangement according to one of claims 1 or 2, characterized in ’ that a third terminal (6.3) of the emergency dri ver device (1) is connected with the lighting module (I) and additionally the same third terminal (6.3) is connected with the standard driver device (2).

5 4, Driver device arrangement according to one of claims 1 to 3, characterized in that the at least one second light emitting diode (3.2) of the lighting module (3) acts as a blocking diode when voltage is applied from an emergency driver circuit (24) of the emergency driver device (1) to the first terminal (6.1) for connecting at least one first light emitting diode io (3.1) of the lighting module (3).

5. Driver device arrangement according to one of claims 1 to 4, characterized in that the standard driver device (2) is configured to drive the lighting module (3) in a 15 standard operational mode.

6. Driver device arrangement according to one of claims 1 to 5, characterized in that the emergency driver device (1) is configured to drive the lighting module (3) in an 20 emergency operational mode.

I

7. Lighting module, comprising at least one first light emitting element (3.1) and at least one second light emitting element (3.2), and

25 an interface (7.1,7.2, 7.3) for connecting the lighting module (3) to a driver device arrangement (20) for driving the lighting module (3), and characterized in that the lighting module (3) arranges the first light emitting element (3.1) and the second light emitting element (3.2) in a series connection, that the interface comprises a first terminal ¢7.1) and a second terminal (7.2), and that the at least one second light emitting element (3.2) is electrically arranged between a 5 first terminal (7.1) and a second terminal (7.2).

8. Lighting module according to claim 7, characterized in that the at least one first light emitting element (3.1) and the at least one second light io emitting element (3 2) each, are a group of light emitting diodes connected in series.

9. Lighting module according to claim 7 or 8, characterized in that the second terminal (7/2) is blocked from the first terminal (7.1) by the at least 15 second light emitting element (3.2) of the lighting module (3).

10. Lighting system, comprising at least one driver device arrangement (20) according to one of claims 1 to 6 connected for driving at least one lighting module (3) according to one of claims 7 to 8.