Method and lighting system for controlling at least two independently controllable light-emitting diodes

Abstract

Method for controlling at least two independently controllable light-emitting diodes (4, 6), wherein - the two independently controllable light-emitting diodes (4, 6) are each operated by a control device (2a, 2b), - the first light-emitting diode (4) is controlled by the first operating device (2a) from a rechargeable battery in the event of a mains voltage failure, - wherein the second LED (6) is controlled by the second control gear (2b) when the second control gear (2b) is connected to the mains voltage supply via a switchable motion detector, and - wherein the two light-emitting diodes (4, 6) are arranged inside a lamp.

Description

[0001] The invention relates to a method for controlling at least two independently controllable light-emitting diodes according to the preamble of claim 1. Furthermore, the present invention relates to a lighting system for controlling at least two independently controllable light-emitting diodes according to the preamble of claim 2. Technical field and state of the art

[0002] Lighting control and management systems have become an integral part of modern lighting solutions. Modern control gear, such as electronic ballasts for gas discharge lamps or LEDs, typically features interfaces that allow external control commands to be transmitted to the control gear. This enables, for example, the desired luminous intensity (dimming level) of the light source to be set using appropriate control signals.

[0003] In the lighting industry, various standards for controlling control gear have been developed, differing in their complexity. The most technologically advanced are digital solutions, where the control gear has a digital interface through which digital control commands can be sent between a control unit and the control gear.

[0004] Communication can be bidirectional, meaning the operating device can not only receive signal commands but also act as a sender of signals. For example, the operating device can actively send a status report back to the control unit if an error occurs.

[0005] Various methods for transmitting signals are known from the state of the art: Wired transmission (for example, by using the power supply line (Powerline) or a separate pair of lines from the power supply line) and wireless transmission (e.g., radio, infrared) are possible.

[0006] As an example of controlling control gear, the so-called DSI (Digital Serial Interface) technology and the so-called DALI (Digital Addressable Lighting Interface) protocol can be mentioned. The DALI standard provides a comprehensive set of digital control commands for communication with the control gear. In a DALI-compliant lighting system, in addition to the control gear with a digital interface, a corresponding bus system including a digital control unit is required.

[0007] In many cases, the user desires a less complex technology that is somewhat cheaper, but nevertheless provides the essential functionalities.

[0008] Operating devices are also known from the prior art where either a digital signal or a signal generated by a mains-powered push button can be applied to the digital interface (control input). If the user does not wish to use the digital peripherals, the operating device's digital control input can optionally be activated by pressing a push button.

[0009] For example, the duration and repetition rate of the button press are evaluated as signals for switching on and / or off or for brightness control (dimming). An example of such a control device, whose digital control input receives a signal generated by a mains-powered button or switch, is disclosed, for example, in DE 297 24 657 U1.

[0010] One application for controlling the control gear via push-button operation is in presence-controlled lighting solutions, where the control gear is controlled by a motion detector connected to the digital control input. Such control gears, connected to one or more motion detectors, are used, for example, in stairwells, long corridors, underground parking garages, pedestrian underpasses, or subway stations. If a motion detector detects movement, for example, due to the presence of a person, the control gear ensures that the corresponding area is illuminated by the light source at the desired brightness (setpoint). In the absence of movement (absence), the light source is dimmed to a standby level.

[0011] In state-of-the-art control devices, a motion detector is connected to the digital control input, and these control devices only have one stored dimming scenario. The dimming scenario with the individual dimming parameters is defined during the manufacturing of the control device or during installation shortly before commissioning, for example by means of programming, and cannot be changed during operation.

[0012] A dimming scenario determines how the change between dimming levels can occur. Instead of switching abruptly between dimming levels, the control gear can be set so that the change between dimming levels takes place over a specific period of time (fade-on or fade-off time).

[0013] Defining a dimming scenario with suitable values ​​for the dimming levels, fade-on and fade-off times proves to be not easy in practice, as the switching behavior of the control gear can depend heavily on the specific application.

[0014] For example, standards stipulate that a certain level of residual light must always be present in hospital corridors at night, even if no movement has been detected for a certain period of time. In contrast, the lighting in the stairwell of a private apartment building can be switched off relatively quickly at night once things have quieted down.

[0015] The frequency with which a motion detection occurs and the time interval between two successive motion detections can vary greatly: The motion detector in an underground car park is triggered very frequently during peak hours when the car park is heavily frequented (for example, in the morning at the start of work and in the evening at the end of work), while in quieter times, for example in the deep night hours, a motion signal is triggered relatively rarely.

[0016] When setting the dimming scenario, two aspects should be given priority: Firstly, to save as much energy as possible, the light sources should be in operation for the shortest possible time and only when absolutely necessary. Secondly, rapid switching on and off cycles with short durations should be avoided, as this can shorten the lifespan of the light source.

[0017] With certain light sources, such as high-pressure gas discharge lamps, rapid switching on and off is not possible, as the lamp must first cool down before it can be reignited. There are also differences in the energy efficiency of various light sources at different brightness levels. For example, a high-pressure gas discharge lamp can be operated very efficiently at high brightness, while LEDs exhibit high efficiency even at very low brightness levels. This consideration also includes the necessary control system. For instance, dimming fluorescent lamps requires preheating the filaments.

[0018] For emergency lighting, individual battery systems are increasingly being used instead of centrally powered systems. Furthermore, new light sources such as LEDs are becoming increasingly compact, making it essential to find the most compact possible design for the emergency lighting systems as well.

[0019] AU 2011 / 100 078 A4 discloses a lighting system comprising a first lighting circuit configured to provide a first predetermined illuminance, and a second lighting circuit having at least one sensor with an input such that its actuation causes the second light source to provide a second predetermined illuminance for a predetermined period of time.

[0020] WO 2010 / 048 652 A2 discloses a method for controlling electronically controlled lighting control gear.

[0021] DE 10 2008 016 788 A1 discloses an LED-based emergency lighting system. Description of the invention

[0022] The object of the invention is to improve the control of operating devices. In particular, it is intended to meet the requirements of energy efficiency and the preservation of the light source.

[0023] The stated problem of the invention is solved by the features of the independent claims. The dependent claims further develop the central idea in a particularly advantageous way.

[0024] The invention relates to a method for controlling at least two independently controllable light-emitting diodes, wherein - the two independently controllable LEDs are each operated by a separate control unit, - the first LED is controlled by the first control device from a rechargeable battery in the event of a mains voltage failure, - wherein the second LED is controlled by the second control gear when the second control gear is connected to the mains voltage supply via a switchable motion detector, and - where the two light-emitting diodes are arranged inside a lamp.

[0025] The invention also relates to a lighting system for controlling at least two independently controllable light-emitting diodes, wherein - the two independently controllable LEDs are each operated by a separate control unit, - the first operating device has a rechargeable battery and controls the first LED at least in the event of a mains power failure, - wherein the second LED is controlled by the second control gear when the second control gear is connected to the mains power supply via a switchable motion detector, and - where the two light-emitting diodes are arranged inside a lamp.

[0026] According to the invention, a method for controlling electronically controlled operating devices is proposed. Typical examples of such operating devices are operating devices (drivers) for organic or inorganic light-emitting diodes.

[0027] The invention also relates to an operating device for light sources, which is designed to carry out such a method.

[0028] The invention also relates to a lighting system for controlling electronically controlled operating devices, wherein the lighting system comprises at least two operating devices and at least one motion detector.

[0029] Further advantages, features and properties of the present invention will now be explained with reference to the two accompanying figures. Fig. Figure 1 shows an arrangement of an operating device 2b with a motion detector 1 and an operating device 2a. Fig. Figure 2 shows the time course of the control of the light source 6.

[0030] Fig. Figure 1 shows a schematic representation of a lighting system 10 comprising a first (electronic) control device 2a, which is connected to a rechargeable battery ('battery') and a light source 4 connected to its output, a known motion detector 1, a second (electronic) control device 2b, and a light source 6 connected to its output.

[0031] The light source 4 can, in principle, be any type of light source, such as gas discharge lamps or organic or inorganic light-emitting diodes. Similarly, the light source 6 can, in principle, be any type of light source, such as organic or inorganic light-emitting diodes or gas discharge lamps. According to the invention, both light sources 4 and 6 are designed as light-emitting diodes.

[0032] The operating device 2b shown has terminals L, N which can be connected to a mains voltage supply.

[0033] A standard motion detector 1 is connected between the mains input of the operating device 2b and the mains input of the operating device 2b. Essentially, two different voltages can be present at the mains input of the operating device 2b: the mains voltage when motion is detected by the motion detector 1, and no mains voltage (preferably 0V) when no motion is detected by the motion detector 1.

[0034] In the example shown, the following definition applies: If the motion detector 1 detects a movement, it short-circuits the connection between the phase conductor L and the mains connection of the operating device 2b, so that the voltage level of the phase conductor L is present at the mains connection of the operating device 2b.

[0035] In the other case, if motion detector 1 does not detect any movement, the connection between phase conductor L and the mains connection of the operating device 2b is interrupted, so that no voltage is present at the mains connection of the operating device 2b. Of course, other definitions or encodings of the motion signal are possible. For example, the motion detector can have a PIR (passive infrared sensor) or an ultrasonic sensor for motion or presence detection and switch on the mains voltage based on this detection.

[0036] The control gear 2a for at least one light source contains at least one operating circuit for a light source 4. The control gear 2a has inputs for supplying the operating circuit with power (for connection to a mains voltage) and outputs for connecting the light source 4. The control gear 2a can also function as an emergency operating device. The operating circuit can include an input filter and a rectifier, as well as a capacitor for absorbing and temporarily storing energy from the mains voltage. Optionally, it can also include a circuit for active power factor correction, such as a boost or flyback PFC. The energy stored in the capacitor can be used to operate the connected light source 4. The operating circuit can also include a driver circuit for controlling a light source 4.For example, a light source 4 can be controlled via a switching regulator such as a buck converter. However, other switching regulator topologies are also possible, such as a flyback converter, a boost converter, or a buck-boost converter.

[0037] The operating circuit of the control device 2a can include a battery charging circuit and be connected to a battery. In the event of a failure of the supply voltage at the inputs supplying the first operating circuit, it can take over the operation of the connected light source 4, with the operating circuit being powered by the battery in this case. Preferably, a battery discharge circuit is provided as a driver circuit, via which the light source 4 is controlled. The battery charging circuit and the battery discharge circuit can also be combined in a bidirectional converter.

[0038] Preferably, the first operating device 2a supplies power to the first light-emitting diode 4 both when mains voltage is applied and when mains voltage fails. When mains power is applied, the rechargeable battery is charged and the first LED 4 is activated by the mains voltage. In the event of a mains power failure (emergency lighting situation), the first LED 4 is activated by the rechargeable battery.

[0039] The first control gear 2a can have two separate mains inputs. The first mains input can be used for power supply, both to power the first LED 4 and to charge the rechargeable battery. The second mains input can be used to detect a mains failure.

[0040] It would be possible to connect the first power input to the mains via a switch, while the second power input remains permanently connected. This allows the first control gear to be switched off. If the first power input is disconnected from the mains by the switch, but mains voltage is still present at the second power input, the control gear can recognize that there is no power outage, but only a shutdown (for example, because no lighting is required).

[0041] In a version of the first operating device 2a with two separate mains inputs, the second input, which is permanently connected to the mains voltage, can also be used to charge the rechargeable battery.

[0042] The operating circuit can also detect the connection of an emergency lighting supply voltage to its inputs and adjust the operation of the connected light source accordingly, for example by reducing its brightness. The operating circuit can include a control unit that optionally controls and regulates both the battery charging circuit and the driver circuit for the connected light source 4.

[0043] The operating circuit can also be distributed across several circuit boards; for example, the battery charging circuit and the driver circuit for the connected light source 4 can be arranged on separate circuit boards.

[0044] A printed circuit board can contain connection means for a battery. The battery can be integrated into the control gear 2a or connected to the control gear 2a.

[0045] The battery can be rechargeable. The rechargeable battery can also be a high-capacity capacitor, such as a so-called 'goldcap'.

[0046] The control gear 2a and at least one light source can be a component of an emergency lighting unit.

[0047] It is therefore possible to set up an emergency lighting system.

[0048] The first control device 2a can also control the light-emitting diodes 4 when a mains voltage is applied.

[0049] The second operating device 2b can have a similar operating circuit to the first operating device 2a, wherein the second operating device 2b preferably has no battery and no battery charging circuit.

[0050] The control gear 2b or 2a can optionally be equipped with an interface via terminals D1 and D2. These terminals D1 and D2 can be configured to transmit digital commands to the control gear, for example, according to the DALI standard protocol, or to allow the control gear to send digital signals. Optionally, terminals D1 and D2 can be configured to transmit signals via the supply voltage, such as mains voltage, or via push-button signals.

[0051] Optionally, the two terminals D1 and D2 can also be designed to transmit analog signals such as 1-10V signals.

[0052] The control gear 2b or the control gear 2a may also have an additional interface with connections D3 and D4. This interface (D3, D4) can receive signals from, for example, a brightness sensor or other sensor, or from another control gear or controller. It may also be possible to send signals via this additional interface (D3, D4). The specific use of this additional interface can be programmable.

[0053] However, it may also be possible to directly connect and control another light source, such as an LED, to this interface (D3, D4). As mentioned, the use of this additional interface with connections D3 and D4 can be programmable, meaning these connections can be reprogrammed, for example, to control the additional light source.

[0054] According to the invention, a method for controlling at least two independently controllable LEDs 4, 6 is thus provided, wherein the two independently controllable LEDs 4, 6 are each operated by a control device 2a, 2b, the first control device 2a has a rechargeable battery and controls the first LED 4 at least in the event of a mains voltage failure, and wherein the second LED 6 is controlled by the second control device 2b when the second control device 2b is connected to the mains voltage supply via a switchable motion detector. The two independently controllable LEDs 4, 6 are thus each operated by a control device 2a, 2b. In the event of a mains voltage failure, the first LED 4 is controlled by the first control device 2a from a rechargeable battery.The second LED 6 is controlled by the second operating device 2b when the second operating device 2b is connected to the mains voltage supply by a switchable motion detector.

[0055] The lighting system 10 can be used to control a light source, wherein the light source has at least two independently controllable light-emitting diodes 4, 6, the two independently controllable light-emitting diodes 4, 6 are each operated by a control gear 2a, 2b, the first control gear 2a has a rechargeable battery and controls at least one light-emitting diode 4 in the event of a mains voltage failure, and wherein the second control gear 2b is connected to the mains voltage supply via a switchable motion detector.

[0056] The light sources 4, 6 may differ in their light spectrum and / or their properties with regard to dynamics or lifespan.

[0057] According to the invention, the light source 4 can be a light-emitting diode or, in an unclaimed embodiment, a gas discharge lamp (fluorescent lamp, high-pressure gas discharge lamp), and the further light source 6 can be an organic or inorganic light-emitting diode (LED).

[0058] The two light sources 4, 6 are arranged inside a light fixture.

[0059] A possible time course of the voltage applied to the output of the operating device 2b for supplying the LEDs 6 is shown in the Fig. Figure 2 shows the voltage curve for powering the LEDs 6. The voltage curve can be adjusted.

[0060] If a movement is detected by the motion detector, then in this example the full mains supply voltage is present at the mains connection of the operating device 2b; if, on the other hand, the motion detector 1 does not detect any movement, then no voltage is present at the mains connection of the operating device 2b.

[0061] Optionally, the motion detector 1 can be designed so that, after the cessation of movement, the voltage at the mains connection of the control gear 2b does not drop immediately, but is maintained at the mains connection of the control gear 2b for a certain period of time (delay time). This period (delay time) can optionally be adjusted on the motion detector 1.

[0062] The Fig. Figure 2 shows the control of the LEDs 6 by the operating device 2b and serves to explain the possible course of the control of the LEDs 6.

[0063] If the mains supply voltage is now applied to the mains connection of the control gear 2b (i.e., movement is detected), the control gear 2b immediately activates the LEDs with the specified light output for normal operation (no quick start). Due to the internal components of the control gear 2b and possibly also due to the connected light source 6, a ramp-up phase occurs until the nominal light output is actually reached (delays may occur, for example, due to the necessary charging of capacitors). However, it is also possible that the LEDs 6 are briefly activated with a higher power than the light output specified for normal operation. In this case, the nominal power output can only be activated after a specific, predetermined time period. In this example, that predetermined time period is 55 seconds or 5.5 minutes (55s quick start, 5.5 min quick start). If the voltage at the mains connection of the operating device 2b changes to zero (by opening the motion detector 1), the LEDs 6 are switched off.

[0064] Light source 4 can, for example, be permanently activated (i.e., both when mains power is present and when mains power is interrupted), with light source 6 providing the perceived brightness due to its higher brightness (resulting from its greater number of LEDs). In this case, light source 4 can also be a light source whose brightness should not be frequently switched on or off. Changing the brightness, for example, when motion is detected, can be achieved by modifying the control signal of light source 6. Thus, an additive overall brightness can result from operating both light sources 4 and 6.

[0065] In this way, energy-efficient lighting is possible when mains voltage is applied, as a basic level of brightness is ensured (by activating the first LED 4) when no one is present. When presence is detected, a higher brightness is achieved by switching on the second LED 6.

[0066] In the event of a mains power failure, the necessary emergency lighting is ensured by activating the first LED (4) from the rechargeable battery. This provides safe and energy-efficient lighting for corridors, barracks, offices, garages, or similar locations.

[0067] Another possibility of the invention is that the control of the LEDs 6 is adapted to the switching behavior of the motion detector 1. For this purpose, the signal present at the mains connection of the operating device 2b can be statistically evaluated. In one possible embodiment, the frequency and intervals at which mains voltage is applied are recorded and / or evaluated. If the mains voltage is supplied by a motion detector 1, this means that a statistical evaluation is performed to determine how often and / or at what intervals movements are detected. This information can then be used to dynamically adjust the brightness settings for the LEDs 6 to the respective situation. Various scenarios can be stored in the control gear 2b, and the evaluation of the motion detection signals can be used to select a specific scenario.

[0068] If many movements are detected within a specific period (meaning the room in question is heavily frequented), the time required to switch to the nominal power output can be extended. Additionally or alternatively, the operating setpoint can also be changed (e.g., increased).

[0069] It is also possible to switch between different scenarios; for example, the control gear 2b no longer switches directly to the operating setpoint in one step, but instead pauses at one or more intermediate brightness levels. These intermediate brightness levels can be selected to be close to the operating setpoint. These measures ensure that the room in question is very well illuminated during periods of high occupancy.

[0070] By analyzing the switching behavior of motion detector 1, it is also possible to determine whether it has a delay time set. Furthermore, it is possible to estimate the length of this delay time, if any.

[0071] If the room in question is less frequently used, the scenario can be adjusted so that the operating setpoint is reached more quickly, meaning that the time required to switch to the operating setpoint is reduced. The scenario itself can also be adapted.

[0072] In another advantageous implementation variant, the scenario (the brightness parameters) can be adapted to the time of day (day period). Thus, different scenarios can be stored in the control gear 2b, and a different scenario can be used and / or selected depending on the time of day.

[0073] In another embodiment, the time of day can be determined by capturing the control signals. The operating device 2b can be configured to recognize patterns or characteristics based on the statistical evaluation of the motion detection signals, identifying those patterns or characteristics that repeat in a daily rhythm and thus allowing conclusions to be drawn about the time of day (day period). This time of day detection can also be supplemented by measuring the brightness, for example, using a light sensor.

[0074] Depending on the time of day, the period of the day, or the statistical evaluation of the motion detection, the LEDs 6 can be controlled to different brightness levels. For example, if a high number of motions are detected, the LED 6 can preferably be operated and controlled at a high brightness, while if the switching frequency is low, the LED 6 can be controlled at a lower brightness. Alternatively, a brightness sensor can be connected to the control gear 2b (for example, via an interface D1, D2, or D3, D4), and the brightness of the connected LED 6 can depend on the signal from the brightness sensor.

[0075] The control of the operating device 2b can also be carried out via a relay of a central control system or, for example, depending on another presence detection system such as a door monitoring system.

[0076] Setting the brightness values ​​(e.g., the operating setpoint) and the brightness parameters of the scenario can be done, for example, via an interface (D1, D2 or D3, D4). This programming can be carried out during operation, installation, manufacturing, etc. The programming interface can also be wireless.

[0077] According to the invention, the lighting system (10) can also be constructed in such a way that the control of at least two different light sources (4, 6) is carried out by at least two operating devices (2a, 2b), each of which operates a light source (4, 6).

[0078] The control devices (2a, 2b) can each have at least one interface (D3, D4) that are interconnected, and at least one first control device (2a or 2b) can have a further interface (D1, D2). Unidirectional or bidirectional communication between the control devices (2, 2') can be enabled via the interconnected interfaces (D3, D4).

[0079] The first control gear (2a) can operate the first lamp (4), and the second control gear (2b) can, for example, operate the second lamp (6). Upon receiving a signal supplied via another interface (D1, D2), the first control gear (2a) can also communicate with the second control gear (2b). The second control gear (2b) can respond to communication (via the interconnected interfaces D3, D4) with the first control gear (2a) upon receiving a signal supplied via another interface (D1, D2).

[0080] The first control gear (2a) can additionally control the connected light source (4) depending on the signal supplied via another interface (D1, D2). The first control gear (2a) can also control the connected light source (4) depending on the communication with the second control gear (2b). Preferably, the control of the connected light source (4) is based on the information transmitted via the interconnected interfaces (D3, D4); optionally, in the case of bidirectional communication, the first control gear can also respond to signals from the second control gear (2b).

[0081] The following is an exemplary example of a lighting system with at least two light-emitting diodes 4, 6 according to the invention. The LEDs 4 and 6 are preferably arranged on a carrier element. Thus, preferably both LEDs 4 and 6 are arranged on a common carrier element. However, instead of a single LED 6, several closely spaced LEDs can also form a point of light. It is also possible to arrange LEDs of different colors next to each other. Alternatively, several LEDs arranged in series and / or parallel can be used instead of the single LED 6. Furthermore, a second LED 4 is arranged on the carrier element. Alternatively, instead of a second LED 4, several closely spaced LEDs can form a point of light. Alternatively, LEDs of different colors can be used next to each other. Alternatively, several LEDs arranged in series and / or parallel can be used instead of the second LED 4.

[0082] The support element can, for example, have a round or rectangular, preferably octagonal, shape. The support element is, for example, arranged in a housing with a lower housing part. The housing can, for example, have features (slots or bores) for fastening. An upper housing part can be fitted as a common lens and / or cover over the LEDs 4, 6.

[0083] Preferably, 4 or 6 white LEDs are used as light-emitting diodes, e.g. in the form of dye-converted LEDs or a combination of RGB LEDs.

[0084] If the LEDs 4 and 6 are mounted using COB (Chip-on-Board) technology, they can each be covered by a so-called globe top, which can also act as a lens. Alternatively, the LEDs 4 and 6 can also be mounted on the substrate using SMD technology. If a phosphor coating is applied over the LEDs 4 and 6, it can be applied as a layer or spaced apart.

[0085] The electrical leads for the LEDs 4, 6 can be mounted on the carrier element. At least part of the control electronics for the LEDs 4, 6, for example a constant current source, can be integrated into or arranged in or on the carrier element.

[0086] The carrier element can have independent connections for the first LED 4 and the second LED 6.

[0087] Thus, for example, a lighting system for escape route lighting can be formed according to the invention, whereby lighting is possible both in emergency lighting situations and in normal operation in accordance with the requirements but with the lowest possible energy consumption.

[0088] In summary, the invention discloses an improved control of two light sources (4, 6) by at least two control devices 2a and 2b, which is characterized by its ability to adapt flexibly and dynamically to different situations.

[0089] According to the invention, light-emitting diodes (LEDs) can be used as light sources. This enables rapid switching and energy-efficient operation in all operating situations. Preferably, both LEDs 4, 6 or groups of LEDs are arranged on a common support element. However, it is also possible to arrange the first LED 4 and the second LED 6 on separate support elements. This invention could also be applied using alternative light sources; for example, the second light source could also be a fluorescent lamp.

Claims

[1] Method for controlling at least two independently controllable light-emitting diodes (4, 6), wherein - the two independently controllable light-emitting diodes (4, 6) are each operated by an operating device (2a, 2b), - the first light-emitting diode (4) is controlled by the first operating device (2a) from a rechargeable battery in the event of a mains voltage failure, - wherein the second light-emitting diode (6) is controlled by the second operating device (2b) when the second operating device (2b) is connected to the mains voltage supply by a switchable motion detector, and - wherein the two light-emitting diodes (4, 6) are arranged within a lamp. [2] Lighting system (10) for controlling at least two independently controllable light-emitting diodes (4, 6), wherein - the two independently controllable light-emitting diodes (4, 6) are each operated by an operating device (2a, 2b), - the first operating device (2a) has a rechargeable battery and controls the first light-emitting diode (4) at least in the event of a mains voltage failure, - wherein the second light-emitting diode (6) is controlled by the second operating device (2b) when the second operating device (2b) is connected to the mains voltage supply via a switchable motion detector, and - wherein the two light-emitting diodes (4, 6) are arranged within a lamp. [3] Lighting system (10) according to claim 2, characterized in that the switchable motion detector connects the second operating device (2b) to the mains voltage supply by means of a relay or a semiconductor switch. [4] Lighting system (10) according to claim 2 or 3, characterized in that the first operating device (2a) controls the first light-emitting diode (4) even when the mains voltage is applied. [5] Lighting system (10) according to one of claims 2 to 4, characterized in that the first operating device (2a) has at least one interface and digital signals and / or push-button signals can be received via the interface. [6] Lighting system (10) according to claim 5, characterized in that the first operating device (2a) controls the connected first light-emitting diode (4) depending on a signal supplied via a further interface. [7] Lighting system (10) according to one of claims 2 to 6, characterized in that the first light-emitting diode (4) is an organic or inorganic light-emitting diode (LED) and the second light-emitting diode (6) is an organic or inorganic light-emitting diode (LED). [8] Lighting system (10) according to one of claims 2 to 7, characterized in that the two light-emitting diodes (4, 6) are arranged on a common carrier element.

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