EP2315683A1

EP2315683A1 - Light energy saving function adapted to a traffic situation

Info

Publication number: EP2315683A1
Application number: EP09780070A
Authority: EP
Inventors: Berengar Krieg
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2008-08-19
Filing date: 2009-07-01
Publication date: 2011-05-04
Also published as: US20110196574A1; WO2010020460A1; DE102008041355A1

Abstract

The invention relates to a method, a device, a computer program, and a computer program product for controlling a lighting system (110) of a motor vehicle (100), particularly a headlight system of a motor vehicle participating in road traffic. The following controlling steps are performed: detecting a current traffic situation comprising at least detecting a motor vehicle speed and detecting a state of the lighting system (110), and adjusting the state of the lighting system (110) according to the detected traffic situation, wherein detecting the current traffic situation further comprises the step of detecting an obstacle (160) in order to adjust the lighting system (110) according to the traffic situation determined in such a way.

Description

description

title

Traffic situations adapted light energy saving function

The invention relates to a method for controlling a lighting system of a

The invention further relates to a computer program comprising program code means for carrying out all the steps of the method according to the invention as claimed in claim 6 and comprising a computer program product

The invention also relates to a device for controlling a lighting system of a motor vehicle, in particular a headlight system of a motor vehicle participating in road traffic according to claim 8.

State of the art

The invention is based on a method, a device, a computer program and a computer program product for regulating a

Lighting system of a motor vehicle, in particular a headlight system of a motor vehicle participating in the traffic according to the class of the independent claims.

Subject of the present invention are all vehicles with

Lighting systems, position lighting and the like, which make use of generic methods, devices, computer programs and / or computer program products.

From WO 00/50260 is a scheme for automatic or semi-automatic switching from high beam to low beam and vice versa a motor vehicle known. In this case, a regulation of the respective speed of the motor vehicle appropriate lighting condition is determined in accordance with specifiable rules and adjusted at least partially automatically.

Disclosure of the invention

The inventive method, the inventive device, the computer program according to the invention and the inventive

Computer program product for controlling a lighting system of a motor vehicle, in particular a headlight system of a motor vehicle participating in road traffic with the features of the corresponding main claim or independent claim have the advantage that this one needed for lighting

Energy for a traffic situation in which no or a reduced lighting is required, that is, for example, when a vehicle is not actively participating in road traffic, such as when stopping in front of a traffic light, significantly reduced. In this case, the lighting is activated when actively participating in traffic, or if it is necessary due to the respective traffic situation, accordingly, so as not to be exposed to additional safety risks. Another advantage of the present invention is that the lighting system is controllable so that other road users, such as oncoming or ahead vehicles, cyclists and / or people by an appropriate regulation of

Lighting system are not or only slightly influenced, for example, not blinded.

By detecting the traffic situation, in particular with regard to a vehicle speed and / or a state of the light system of the vehicle or vehicle participating in the road, with a shutdown of the vehicle does not fall into the participation in road traffic, can be an energetically and safety optimal lighting condition of a motor vehicle depending on the Realize traffic situation. Adjusting a state of the lighting system may include switching from a state of the lighting system, such as an operating lighting or low beam condition, in which more energy is required and required to operate the vehicle or to actively participate in road traffic, including high beam another state of the lighting system, for example, a power-saving state or a parking lighting state, in which less energy is required include, wherein the switching can be done automatically, semi-automatically or manually. For a manual or at least partially automatic switching can be provided corresponding warning mechanisms, with which a user of the motor vehicle can be pointed to energy-saving measures by switching. Switching to the higher-energy state-for example, an operating lighting state-preferably takes place automatically, so that a possible security risk can be excluded by incorrect manipulation of the user. The adjustment may include, in addition to switching, continuous or discontinuous dimming by going through a number of several different states of the lighting system. In order not to endanger a user of the motor vehicle in which the invention is implemented, it is additionally detected whether an obstacle is in conflict with a change of state of the lighting system. If, for example, another motor vehicle is detected, a change in the state of the light system, for example a fade-in or a darkening, is only permissible within certain limits or even not at all for safety reasons. The detection of the obstacle can be carried out, for example, at a distance in which the obstacle is not or no longer within the field of vision of the driver of a motor vehicle. Detecting is beyond mere detection, such as through a sensor. In one embodiment, detection comprises a calculation of acquired data, for example by means of complex algorithms. Thus, variables derived from recorded quantities, such as distance or

Distance to an obstacle, be detected, for example, a closing speed to the obstacle. The measures listed in the dependent claims advantageous refinements and improvements of the independent and independent claims devices are possible.

It is particularly advantageous that the detection of the obstacle continues the

Step detects: detecting an approach to the obstacle to adjust the lighting system depending on the traffic situation thus determined. The detection can be done, for example, by a distance measurement to the obstacle or as a measure of a speed of approaching the obstacle, that is, derived variables of a distance measurement, for example

Changes in a distance in a period.

The detection may include detecting further parameters, in particular parameters relevant for the respective traffic situation. For example, these parameters may be selected from the group of parameters including own vehicle speed, obstacle size and speed, such as a foreign vehicle speed, ambient brightness, and the like. Adjustment can in particular also be effected as a function of these further parameters. Thus, for example, setting the light system in a lower-energy state, that is to say darkening, only takes place when it falls below its own vehicle speed, for example at a speed of 10 km / h. Also, when exceeding a separate vehicle speed, for example, from 25 km / h, a setting in a higher-energy state of the lighting system, that is, a lightening done. In particular, when a vehicle speed is close to or equal to zero, a lower-energy state may be set. Especially when parking a high-energy, full operating lighting of the motor vehicle is not required, especially if no other road users are involved. A variety of motor vehicles have distance sensors and the like, which assist a driver when parking and / or by which a parking operation without intervention of the driver can be performed. In particular, in such vehicles lighting with high lighting costs of the environment is usually not necessary. By recording the traffic situation, in particular the Detecting the presence of other, relevant road users, a switch to an operational lighting is feasible, so that no safety risks for the user or other road users arise. Switching or setting from a higher energy, brighter state to a lower energy, darker state, or vice versa, can be discrete or continuous, that is, multiple discrete illumination states can be traversed, or some sort of dimming occurs, that is, it is continuous Darkening or saving energy done. The dimming can be carried out according to a predefinable control curve, for example as a function of the vehicle speed, a distance to objects, the ambient brightness and other parameters. The detection of relevant objects, that is to say of obstacles, preferably comprises the detection of obstacles in a specifiable area surrounding the motor vehicle, in particular in a front area, in a side area and / or in a rear area. The area can be fixed or variably changed, for example by reference to the traffic situation. For example, the range can be increased at higher speeds and reduced at lower speeds. In this way, it is ensured that objects relevant to the traffic situation, such as other motor vehicles, obstacles, persons, are correspondingly recorded and taken into account for the evaluation. The area can be adjusted according to the state of the lighting system, that is, for example, an area that is illuminable with the state of the lighting system. Irrelevant objects or obstacles are not taken into account when setting the state accordingly, which ensures a data reduction, which gives a faster response time. Preferably, depending on the traffic situation, only certain areas, for example when driving forward only one front area, are taken into account.

The recorded parameters can be evaluated individually or in combination, ie networked with each other, in order to ensure an energetically as well as safety-optimized lighting state. Yet another advantage of the present invention is that detecting the current traffic situation further comprises the step of detecting at least one environmental condition such as ambient brightness or road conditions. For example, in daylight, switching on the light of a lighting system can be kept to a minimum. Also can be at the

For example, set the lighting system so that as few reflections as possible dazzle other road users. The detected parameters can be networked with each other in particular.

Preferably, adjusting comprises reducing or increasing one

Power supply of the lighting system, when the state of the light system, for example, a lighted area, the vehicle speed, the approach speed to an obstacle, a time variable and / or corresponding variables derived therefrom reach or pass a respective corresponding limit. These conditions can each cause a change in the setting. It is more advantageous, however, if several parameters are logically ANDed to ensure the highest possible safety standard. The more parameters that are linked, the higher the safety for all road users.

Another inventive advantage of the invention is that the reducing or increasing comprises switching to or switching back from a power saving state comprising a standby state or an off state of the lighting system. Thus, switching to the power saving lighting state may include turning off the lighting. To this

This way, a maximum of energy for lighting can be saved.

One advantage is that switching over from the energy-saving lighting state to the operating lighting state is carried out in a time-dependent, speed-dependent and / or object-dependent manner, wherein preferably all three parameters are taken into account when switching over into AND operation. The switching from the operating lighting state to the power saving lighting state occurs depending on the traffic situation. Accordingly, switching becomes from the power saving lighting state into the operating lighting condition dependent on corresponding parameters. Thus, for example, when driving speed increases, for example when starting from a parking or holding state, the operating lighting state is automatically switched on, since it can accordingly be assumed that traffic is actively involved. This may, for example, be coupled with data from a motion sensor which detects, for example, inclines, accelerations, turns, and the like.

The inventive device for controlling a lighting system of a

Motor vehicle, in particular a headlight system of a motor vehicle participating in the road with the features of the corresponding claim have over the prior art has the advantage that an energetically and safety optimized lighting state is adjustable by the use or implementation of the method. Existing lighting systems can be retrofitted with appropriate centers so that existing lighting systems can be optimized in terms of energy and safety. Preferably, the device according to the invention for controlling a lighting system of a motor vehicle, at least one detection device for

Detecting a current traffic situation comprising at least one detection unit for detecting a motor vehicle speed and a detection unit for detecting a state of the light system and a control device for controlling the state of the light system depending on the detected traffic situation. In addition, the detection device further comprises at least one detection unit for detecting an obstacle in order to set the lighting system as a function of the traffic situation determined in this way. The detection units may be simple or complex sensors or may include computing and control devices to determine, for example, derived quantities of detected quantities, such as a distance to an obstacle of a distance change or a approach speed. It is advantageous, for example, that a control device is provided, which comprises at least one sensor for detecting at least one parameter of a traffic situation, preferably a plurality of sensors. The sensors can be designed to be one Parameters such as one's own vehicle speed, foreign vehicle speed (s), objects relevant to the traffic situation, such as other motor vehicles, ambient brightness, road conditions, and the like, to set an appropriate state of the light system in which appropriate illumination is ensured for active participation to allow on the road. For example, the parameters may be used singly or in combination, for example, in an AND operation for setting in an energy saving lighting condition in which the lighting is reduced such that active participation in road traffic must rest, with a re-switching into the Operation lighting state occurs when it requires the current traffic situation depending on the detected parameters. With the appropriate components a simple lighting adjustment is feasible. By means of suitable interfaces, the components according to the invention can be easily integrated into existing lighting systems.

Another advantage of the present invention provides that the detection unit for detecting an obstacle as at least one distance sensor unit comprising at least one ultrasonic sensor, in particular at least one ultrasonic sensor of a parking aid, is formed. These distance sensors are easy to retrofit and are partially already present on motor vehicles, so that they can be easily used for a functional extension in terms of setting the lighting system.

In particular, it is advantageous that the control device with a

Headlight control for the realization of at least one

Lighting state is coupled to realize a function of the traffic situation, a corresponding lighting condition. For example, you can use brightness-controlled lighting systems, depending on your needs

Ambient brightness on or off a lighting system, coupled with the functions of the invention and expand.

Advantageously, the method can be realized as a computer program and / or computer program product. Below this are all arithmetic units too In particular, integrated circuits such as FPGAs (Field Programmable Gate Arrays), ASICs (Application Specific Integrated Circuit), ASSPs (Application Specific Standard Products), DSPs (Digital Signal Processor) and the like, as well as hard-wired arithmetic units. Simple programming and insertion or transfer of appropriate components or appropriate program code makes installation or retrofitting easy.

Brief description of the drawings

An embodiment of the invention is illustrated in the drawings and explained in more detail in the following description.

Show it:

Fig. 1 shows schematically a flowchart of an embodiment of the method according to the invention and

Fig. 2 shows schematically a motor vehicle with an inventive

Contraption.

Embodiments of the invention

FIG. 1 shows a schematic diagram of an embodiment of the method according to the invention. With the ovals shown in the figure, different states 1 to 8 and with the diamonds different transition conditions 9 to 20 are characterized, which are explained in more detail below with reference to the corresponding reference numerals. The states and / or steps differ due to a driving situation of the driver Motor vehicle and / or due to the tasks of a sensor and / or a control system. The illustrated states / steps represent possible scenarios that occur during use of the system.

State 1 indicates any state while driving a

Motor vehicle. Starting from the arbitrary state 1, which is shown three times in the figure and which may correspond to each of the other states 2 to 8, a corresponding next state can be achieved. In state 1, for example, the dipped beam and / or the high beam can be switched on or off. State 1 thus identifies any driving scenario.

Starting from the arbitrary state 1, for example at the top left in the figure, a state 2 is reached via the transition condition 9, the switching off of the vehicle lighting.

In state 2, the deactivation of the dipped headlight of a motor vehicle is switched off. State 2 is assumed as the first state when the vehicle or the lighting system is put into operation (initial state).

Starting from any state 1, for example at the top right in the figure, or any state 3 to 8, is determined by the

Transient condition 10, detects an error in the lighting system, more precisely in the control or lighting control system, or detects an error in a system or sensor necessary to detect the current traffic situation and involved in this function.

Both transition conditions 9 and 10 allow as a further state only state 2, in which the method for switching to an energy-saving lighting state is not executable, that is, a Abblendlichtabschaltung is not active. Thus, the lighting system can not (automatically) switch according to the method.

Starting from state 2, that is, a deactivated Abblendlichtabschaltung, with transition condition 11, the dipped beam is or is turned on, changed to state 3, the low beam is switched on and there is no transition condition 10 before. The Abblendlichtabschaltung is not active here, as indicated by the state 3, that is, the low beam is turned on, but the Abblendlichtabschaltung is not activated. Thus, in state 3 headlights of the lighting system are energized. The energization can be carried out to varying degrees, that is, with a different voltage and / or current. The intensity of the current is basically proportional to the brightness of the lighting system, ie the stronger the current, the brighter the lighting. The deactivation of the dipped beam is not active, but not defective. In this state 3 (and also in the states 4 to 8), it is checked whether the present mode of operation should be permanently activated. This can be done for example via a separate switch device to a corresponding light switch. Alternatively, this can be done for example via an on-board computer menu, for example as a signal via a vehicle data bus, such as a CAN bus, a Flexray bus a LIN bus or other signal transmission paths. If this test is successful, ie it is recognized that the function should be permanently active, transitional control 13 is fulfilled. If the test is unsuccessful, transition condition 12 is fulfilled, it remains in state 3 or changes from state 4 to 8 to state 3. If an error is detected in the networking or the detection of the required signals, transition condition 10 is present and it is changed to state 2.

The state 3 can thus also be achieved starting from any state 1, in the figure right approximately in the middle of the figure, when the

Low beam cut-off is disabled as shown with transition condition 12.

Thus, from any state 1, the state 3 with the dipped beam and the dimming switch not active can be achieved as follows:

a) There is no low beam is on and the low beam is turned on accordingly below b) The dipped beam switch-off is deactivated (the dipped-beam headlight may already be switched on upstream or switched on subsequently)

Starting from state 3, state 4 can be reached in a next step.

State 4 is characterized in that here the Abblendlichtabschaltung is activated, which can be done for example via an additional switching unit or via an on-board computer.

In state 4, the low beam is activated and the headlights are driven or energized accordingly. The driving may include the energizing. In particular, the driving is realized by reducing or increasing a power supply. The level of power also varies the brightness produced. The higher the power, the brighter the light system and vice versa. Furthermore, the deactivation of the dipped beam is not active. In this state 4, it is checked whether a detected vehicle speed exceeds an applicable vehicle speed threshold (eg 15 km / h), transition condition 14. If this is the case, the system changes to state 5. If, on the other hand, the low beam is deliberately switched off, that is not automatically due to the invention

Procedure, for example, by a user intervention or an error is detected in the networking and the detection of the required signals is changed to state 2.

State 5 is characterized in that the low beam is activated and the

Headlights are activated or energized. The deactivation of the dipped beam is not active. In this state 5 it is checked with transition condition 15 whether the vehicle speed falls below or reaches an applicable speed threshold, for example a second speed threshold (eg 0 km / h). If this is the case, in the next

Condition 6 changed. If the dipped beam is switched off outside this function, or if a fault in the network and the detection of the required signals is detected, the system switches to state 2.

In state 6 falls below or reaches the actual

Driving speed of the motor vehicle, the set second vehicle speed threshold. Condition 6 is characterized by the following properties: The dipped beam is activated, the headlights are activated / energized. The deactivation of the dipped beam is not active. In state 6 via provided sensors, for example

Short-range sensors, checks whether there is an obstacle in front of the vehicle or whether other relevant objects are present. Depending on the configuration / features of the sensors, a minimum distance to a relevant object, in particular an obstacle, a level of proximity warning or a number and position of the sensors (eg only the middle two of the

Example four sensors) are checked. The minimum distance can be adjusted depending on a vehicle speed. For example, at a speed range of 0 to 5 km / h, the minimum distance may be about 50 cm. If this check / transition condition 16 succeeds according to predetermined setpoint values, the system changes to state 7. If, in state 6, the vehicle speed exceeds the applicable speed threshold, for example a third speed threshold (eg 3 km / h), transition condition 20, state 5 is changed. If the dipped beam is switched off outside this function, or if a fault in the network and the detection of the required signals is detected, the system switches to state 2.

The state 7 is characterized as follows: The dipped beam is activated, the headlights are activated / energized. The deactivation of the dipped beam is not active. Upon entering this state 7, a predeterminable time T (eg 2 seconds) is started. In state 7, with transition condition 17, which is listed here several times for reasons of clarity, it is checked whether a relevant obstacle in front of the vehicle is still detected via the proximity sensors. Also transitional condition 20 is additionally checked, more precisely, whether the vehicle speed does not exceed the applicable, in particular third speed threshold (eg 3 km / h). If the time T has expired, transition condition 18 is met, which is checked in state 7, and the two tests 17 and 20 are unsuccessful, that is to say correspond to certain specifications, is entered in the

Condition 8 changed. Otherwise it changes to state 5. If the dipped beam is switched off outside this function, or if a fault in the network and the detection of the required signals is detected, the system switches to state 2.

Condition 8 is indicated as follows: The deactivation of the dipped beam is active, the headlights are not activated / energized or they are switched from an operating lighting condition to a power saving mode.

Illumination state switched. This can be done discretely or continuously, that is, several discrete lighting states can be run through, or a kind of dimming takes place, that is, darkening or energy saving is continuously carried out. In this state 8, the transition conditions 17 and 20 are checked. If these tests are unsuccessful, the system changes to state 5. In addition, it checks for temporary deactivation of the function. A signal for temporary

Deactivation of the function can, for. B. from the activation of the flasher in this state while suppressing the high beam connection can be realized. However, the signal for temporary deactivation can also be formed externally and provided, for example, as a signal via a CAN, Flexray, LIN, a HW line or other signal transmission paths of the function. If the function is temporarily deactivated, which is checked with transition condition 19, the system switches to state 4. If the dipped beam is switched off outside this function, or if a fault in the network and the detection of the required signals is detected, the system switches to state 2.

Unlike standard passenger cars, the dipped-beam headlamp, when activated, does not remain switched on when a traffic light stop behind a vehicle in front or in a traffic jam. This is not traffic safety mandatory. It is also possible to use short-range sensors for this invention, with which many vehicles are already equipped on the vehicle front or on the hedge (eg parking sensors). These sensors can with a vehicle speed information, which is detectable by means of corresponding sensors, for example with

Wheel speed sensors, and the headlight control are networked to turn off the dipped beam for the service life, so as to save electrical energy and thus in vehicles with internal combustion engine fuel. The function must be implemented on vehicles with electronic lighting control (eg automatic switch-on via brightness sensor) without additional hardware costs. In vehicles with standard H4 or H7 bulbs in the main headlamps can be saved for the life of about 2 * 55 W, so 110 W electrical power. These 110 W must be generated from the fuel via the alternator or the generator with an efficiency of approx. 95% and the combustion engine, whose efficiency at idling is safely below 30%. Ih * 110 W / (0.95 * 0.3) = 0.386 kWh can be saved per hour of service life, which corresponds to the energy content of 0.043 liters of gasoline or 0.039 liters of diesel fuel. With dipped beam on, it is possible to measure an additional consumption of 0.2 liters of fuel per 100 km in a car. At an assumed average speed of

50 km / h, the theoretical value of the fuel economy could be exceeded and up to 0.1 liter of fuel per hour can be achieved. These values are also to be achieved for vehicles with stop-start function, since the electric energy must be provided in the further driving cycle, while the service life is relieved, however, the wiring system and thus the possible life extended.

The short-range sensors on the front of the vehicle are to be networked with the driving speed information and the headlight control in such a way that the low beam after an applicable time of for example a few seconds (eg 2 sec.) After falling below an applicable vehicle speed and the detection of another Vehicle or an obstacle in front of the vehicle is turned off. Stands and / or stops the vehicle without another vehicle In front of the vehicle front (so to speak, first at the traffic light), the low beam is not turned off to continue to identify the oncoming traffic the vehicle. This function can be permanently switched on or off via an additional switch position or via a suitable on-board computer menu if the driver does not wish to use this function. Also, a quick, temporary deactivation of the function (eg by pressing the flashlight while suppressing the high beam) can be provided, for. B. for maneuvering when entering or leaving parking. This deactivation can be canceled by exceeding an applicable vehicle speed. at

Ride on or an engine start, the function should be active only after exceeding a speed threshold to z. B. not when driving in a parking space already to be active.

Fig. 2 shows schematically a motor vehicle 100 with an inventive

Device for controlling a light system 110 of the motor vehicle 100. The light system 110 comprises a plurality of headlights 111, of which only one is shown here. The headlamp 111 emits a corresponding light cone 120 for illuminating an environment of the motor vehicle 100, in particular a road 130, as a function of a drive

Control of the headlights 111, a headlight control 112 is provided. Via the headlight control 112, the headlights 111 can be adjusted so that they emit different light and thus appear different bright. The adjustment of the brightness can be controlled, for example, via the power supply to the headlights 111.

In order to optimally set a corresponding brightness of the headlights 111, a detection unit 140 for detecting a state of the light system 110 is provided. The detection unit 140 may be formed, for example, as a light sensor. In another embodiment, the

Detection unit 140 may be coupled to the headlight controller 112, so that it can be closed by various manipulated variables on a state of the light system 110, for example via a power supply. In order to optimally adapt the lighting system 110 to the respective traffic situation, a detection unit for detecting a motor vehicle speed 150 is furthermore provided. This detection unit 150 may comprise wheel speed sensors 151, for example, as shown in FIG. 2. In addition, the detection unit 150 may be coupled to a speedometer 152 or the corresponding data lines as also shown in FIG. 2 so as to detect the vehicle speed. The detection units 140 and 150 together form a detection device 200 for detecting a current traffic situation, wherein the detection device 200 further detection units for

Detecting various parameters that are relevant for the detection of a current traffic situation may include, such as brightness sensors or the like, but not shown here.

Another detection unit, which is included in the detection device 200, is a detection unit 170 for detecting an obstacle 160. The detection unit 170 is formed in FIG. 2 as a distance sensor unit, in particular as a sound sensor, more precisely as an ultrasonic sensor and can be part of a parking aid. With the aid of the detection unit 170, obstacles 160 that are relevant for the traffic situation can be detected, ie. H. where the potential risk of collision exists.

In order to control the light system 110 as a function of a traffic situation detected by means of the detection device 200, both the light system 110 and the detection device 200 are provided with a

Control device 300 coupled. The control device 300 can regulate the headlight control 112 in accordance with the detected data, so that the light system 110 can be set or controlled in accordance with the detected data.

Claims

claims

A method of controlling a lighting system (110) of a motor vehicle (100) during operation thereof, comprising the steps of:

Detecting a current traffic situation comprising at least detecting a vehicle speed and detecting a

State of the lighting system (110) and

Adjusting the state of the light system (110) in response to the detected traffic situation, characterized in that detecting the current traffic situation further comprises the step of detecting an obstacle (160) to move the light system (110) into

To cease dependency of the thus determined traffic situation.

The method of claim 1, characterized in that detecting the obstacle (160) further comprises the step of: detecting an approach to the obstacle (160) to cause the obstacle (160) to approach

Set light system (110) depending on the thus determined traffic situation.

3. The method of claim 1 or 2, characterized in that detecting the current traffic situation further the step

Detect at least one environmental condition such as ambient brightness or road conditions.

4. The method according to claim 1 to 3, characterized in that the setting as reducing or increasing a power supply of the

Light System (110) is performed when: the state of the light system (110), the vehicle speed, the approach speed to an obstacle (160), a time variable and / or corresponding quantities derived therefrom.

5. The method of claim 1, wherein reducing or increasing comprises switching to or switching back from a power-saving state comprising a stand-by state or an off-state of the lighting system (110).

Computer program comprising program code means for carrying out all the steps according to claims 1 to 5, when the program is run on a

Computer is running.

A computer program product comprising program code means stored on a computer readable medium to perform the method of any one of claims 1 to 5 when said program product is in a

Computer is running.

8. A device for controlling a light system (110) of a motor vehicle (100), comprising: at least one detection device (200) for detecting a current one

Traffic situation comprising at least one detection unit (150) for detecting a

Motor vehicle speed and a detection unit (140) for detecting a state of the

Lighting system (110) and a control device (300) for controlling the state of the light system (110) in dependence on the detected traffic situation, characterized in that the detection device (200) further at least one

Detection unit (170) for detecting an obstacle (160) to set the lighting system (110) depending on the traffic situation thus determined.

9. The device according to claim 8, characterized in that the detection unit (170) for detecting an obstacle as at least one distance sensor unit comprising at least one ultrasonic sensor, in particular at least one ultrasonic sensor

Parking assistance, is trained.

10. The device according to claim 8 or 9, characterized in that the control device (300) is coupled to a headlight control (112) for implementing at least one illumination state, in order to realize a corresponding illumination state as a function of the traffic situation.