EP0052124A1 - Light sensitive switch for a car - Google Patents

Light sensitive switch for a car

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Publication number
EP0052124A1
EP0052124A1 EP19810901316 EP81901316A EP0052124A1 EP 0052124 A1 EP0052124 A1 EP 0052124A1 EP 19810901316 EP19810901316 EP 19810901316 EP 81901316 A EP81901316 A EP 81901316A EP 0052124 A1 EP0052124 A1 EP 0052124A1
Authority
EP
European Patent Office
Prior art keywords
switch
transistor
delay
switching
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19810901316
Other languages
German (de)
French (fr)
Inventor
Kurt Stoll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0052124A1 publication Critical patent/EP0052124A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/052—Switching delay, i.e. the beam is not switched or changed instantaneously upon occurrence of a condition change
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/31—Atmospheric conditions
    • B60Q2300/314—Ambient light

Definitions

  • the aim of the invention is to overcome these disadvantages sided, at the same time minimal intervention in the existing lighting system and great operational reliability.
  • the invention is defined by the features listed in claim 1.
  • the device according to the invention is therefore only influenced by indirectly incident outside light, as a result of which the influence of directly incident light sources, such as glaring street or shop window lighting, and also the lamps of other vehicles, is switched off and a value corresponding to the average brightness prevailing inside the vehicle Control is used.
  • the time delay avoids a rapid sequence of switch-on and switch-off processes when the brightness is in the range of the threshold value.
  • the different delays when switching on and off also allow the selection of optimal delay times, which for safety reasons should of course be shorter when switching on (e.g. entering a tunnel) than when switching off, where a long delay is harmless.
  • Fig. 1 shows a preferred position and orientation of the sensor
  • Fig. 2 is a connection diagram of the device in the electrical system of a vehicle
  • Fig. 3 shows the electrical schematic of an embodiment of the invention.
  • Fig. 1 shows schematically a preferred position of the sensor 1 when the device is subsequently installed and the orientation of its light incidence window, which for example has an opening angle of approximately 80 °.
  • the sensor housing 2 can of course also be installed in the toe board, and other orientations are also the Photo cell possible. In the case of a particularly large rear window, for example, it can be directed more towards the headlining.
  • the switching device can be installed in the existing light insert of a vehicle without cutting any lines of this system.
  • the sensor 1 and the associated control circuit are accommodated in a housing 2.
  • Numbers 3 and 4 designate the light switch and ignition lock of the vehicle, 5-7 connections to the on-board battery, which can be short-circuited to each other depending on the vehicle type, and 8 the connection for the electrical consumers in the vehicle powered by the ignition lock.
  • the light switch 3 of the vehicle has two outputs in the usual way, one of which is intended for general exterior lighting (position lights, license plate lighting, etc.) and c for the headlights. The output c is then usually followed by a switch (not shown) for high beam and low beam.
  • the switching device is supplied via an input line at the output e of the ignition lock 4, so that it does not consume any current when the ignition is switched off.
  • the device When the ignition is switched on and the ambient brightness is low, the device will bypass the light switch via lines 12 and 13 and thus feed the general exterior lighting, as well as optionally the high or low beams of the vehicle. It can be seen from FIG. 2 that the light switch 3 remains fully functional when the switching device is not in use, since the lines of the original lighting system are only tapped, but are not cut anywhere.
  • a photo line 20 receives, indirectly via a diffuser 21 Light from inside the vehicle.
  • the sensitivity of the photocell can be adjusted with a trim potentiometer 22.
  • the photocell and circuit are supplied via the input 23 of the switching device connected to the output e of the ignition lock (FIG. 2), specifically via a main switch 24, which is always conductive in normal operation, and via a transistor 25, the base of which is via a Capacitor 26, with a capacitance of 100 ⁇ F, for example, is controlled.
  • the resulting delay of about 2 seconds between switching on the ignition and starting up the switching device prevents the lighting system of the vehicle from being simultaneously stressed by the starter and lighting in the dark.
  • a diode 27 provided at the input of the device serves to reverse polarity protection, while a light-emitting diode 28 indicates the operation of the device and a Zener diode 29 stabilizes its supply voltage to, for example, 9 V.
  • the photocell 20 controls an operational amplifier 30 (which may correspond, for example, to the international type UA 741 P) and which is followed by a diode 31 and the base of a first NPN transistor whose emitter is connected to the base of a second NPN transistor 33.
  • the photocell 20 controls the operational amplifier 30 such that the first transistor switches on. Because of that
  • this first transistor is only after charging the capacitor 34, ie with a ge know switch through delay to the signal emitted by the photocell and only then make the second transistor 33 conductive.
  • a relay 35 connected to its collector is actuated with work contacts, which then supplies the general lighting and the selector switch for high and low beam independently of one another via lines 11 and 12.
  • the first transistor 32 is fundamentally controlled by the photocell 20 and the operational amplifier 30 such that it blocks again when a certain illuminance is reached, and thus switches off the vehicle lighting via the second transistor and the relay 35.
  • the condenser 34 can only discharge via the base of the first transistor 32, the voltage at this base drops only slowly, and the blocking of the transistor is delayed by a time interval which is a multiple of the switch-on delay caused by the same capacitor 34.
  • a diode 36 is connected between the supply voltage and the collector of the second transistor 33 in order to protect the latter from the inductive currents from the coil of the relay.
  • Another light-emitting diode 38 indicates whether the second transistor is switched on and the lights are thus switched on.
  • a high-frequency interference protection condenser 37 is provided in parallel with the relay in the usual way.
  • resistors necessary for the circuit to function properly are also shown, the values of which, depending on the switching elements used, can be readily determined by a person skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Le commutateur est commande par un dispositif photosensible (20) qui capte a travers un diffuseur (21) de la lumiere provenant de l'interieur de la voiture. Lorsque l'intensite depasse un seuil reglable par un trimmer, le dispositif photosensible commute, a travers un amplificateur operationnel (30) et deux transistors (32, 33), un relai (35) avec deux contacts de travail pour alimenter deux circuits d'eclairage (11, 12) du vehicule. Un condensateur branche entre la masse et la base d'un des transistors (32) retarde l'ouverture et la fermeture de ce transistor et en meme temps l'enclenchement et le declenchement du circuit d'eclairage. Ce retard prend deux valeurs distinctes, celle pour le declenchement etant la plus importante.The switch is controlled by a photosensitive device (20) which collects through a diffuser (21) light coming from inside the car. When the intensity exceeds a threshold adjustable by a trimmer, the photosensitive device switches, through an operational amplifier (30) and two transistors (32, 33), a relay (35) with two working contacts to supply two circuits of lighting (11, 12) of the vehicle. A capacitor connected between ground and the base of one of the transistors (32) delays the opening and closing of this transistor and at the same time the switching on and off of the lighting circuit. This delay takes two distinct values, that for triggering being the most important.

Description

Lichtempfindliches Schaltgerät für Fahrzeuge Light-sensitive switching device for vehicles
Es ist bekannt, bei Fahrzeugen lichtempfindliche Steuergeräte zu verwenden, um beispielsweise die Fahrzeugbeleuehtung in Abhängigkeit der Umgebungshelligkeit automatisch ein und auszuschalten. Die bekannten, durch einen lichtempfindlichen Sensor gesteuerten Geräte haben den Nachteil, dass sie insbesondere während der Dämmerung infolge von durch Wolken , Baumgruppen , Scheinwerfer anderer Fahrzeuge usw, bedingten, vorübergehenden Helligkeitsschwankungen manchmal in rascher Folge ein- und ausschalten. Dies fühϊt zu einem störenden und fallweise irreführenden Blinken der Fahrzeugbeleuchtung. Darüber hinaus sind die Sensoren der bekannten Anlagen angeordnet, um das von aussen direkt einfallende Licht abzutasten, so dass ihr aussenliegendes Lichteinfallfenster oft verschmutzt wird, was die Funktion der Anlage beeinträchtigt. Dies gilt auch für bekannte, im Fahrzeuginneren hinter der Windschutzscheibe angebrachte, und durch diese hindurch nach vorne "blickende" Sensoren, alle Bereiche der Windschutzscheibe Verschmutzungen besonders ausgesetzt sind. Eine solche Anordnung hat auch den Nachteil, dass das Licheinfallfenster des Sensors dem Scheinwerferlicht entgegenkommender Fahrzeuge, besonders stark ausgesetzt ist, wodurch ein sehr unerwünschtes Auslöschen der eigenen Beleuchtung bewirkt werden kann.It is known to use light-sensitive control devices in vehicles, for example to automatically switch the vehicle lighting on and off depending on the ambient brightness. The known devices controlled by a light-sensitive sensor have the disadvantage that they sometimes switch on and off in rapid succession, in particular during twilight due to temporary brightness fluctuations caused by clouds, groups of trees, headlights of other vehicles, etc. This leads to a disturbing and occasionally misleading blinking of the vehicle lighting. In addition, the sensors of the known systems are arranged in order to sense the light that is directly incident from the outside, so that their outside light incidence window is often contaminated, which impairs the function of the system. This also applies to known sensors mounted behind the windshield in the interior of the vehicle and "looking" through them, all areas of the windshield being particularly exposed to dirt. Such an arrangement also has the disadvantage that the light incidence window of the sensor is particularly strongly exposed to the headlight light of oncoming vehicles, which can result in a very undesired extinguishing of one's own lighting.
Es ist das Ziel der Erfindung, diese Nachteile zu be- seitigen, bei gleichzeitig minimalem Eingriff in die schon bestehende Lichtanlage und grosser Betriebssicherheit.The aim of the invention is to overcome these disadvantages sided, at the same time minimal intervention in the existing lighting system and great operational reliability.
Zu diesem Zweck ist die Erfindung durch die in Anspruch 1 aufgezählten Merkmale definiert. Das erfindungsgemässe Gerät wird demnach nur durch indirekt einfallendes Aussenlicht beeinflusst, wodurch der Einfluss direkt einstrahlender Lichtquellen, wie etwa eine grelle Strassen-oder Schaufenster-Beleuchtung, und auch die Lampen anderer Fahrzeuge, ausgeschaltet wird und ein der im Fahrzeuginneren herrschenden mittleren Helligkeit entsprechender Wert zur Steuerung verwendet wird.For this purpose, the invention is defined by the features listed in claim 1. The device according to the invention is therefore only influenced by indirectly incident outside light, as a result of which the influence of directly incident light sources, such as glaring street or shop window lighting, and also the lamps of other vehicles, is switched off and a value corresponding to the average brightness prevailing inside the vehicle Control is used.
Darüber hinaus vermeidet die zeitliche Verzögerung, bei einer im Bereich des Schwellwertes liegenden Helligkeit eine rasche Folge von Ein- und Auschaltvorgängen. Die unter-schiedlichen Verzögerungen beim Ein- und Ausschalten gestatten überdies die Wahl optimaler Verzögerungszeiten , welche aus Sicherheitsgründen natürlich beim Einschalten (Einfahrt in einen Tunnel z.B.) kürzer sein sollten, als beim Ausschalten, bei welchem eine lange Verzögerung unbedenklich ist.In addition, the time delay avoids a rapid sequence of switch-on and switch-off processes when the brightness is in the range of the threshold value. The different delays when switching on and off also allow the selection of optimal delay times, which for safety reasons should of course be shorter when switching on (e.g. entering a tunnel) than when switching off, where a long delay is harmless.
Im folgenden soll die Erfindung anhand der Beschreibung und der Zeichnung näher erläutert werden. Es zeigen:The invention will be explained in more detail below with the aid of the description and the drawing. Show it:
Fig. 1 eine bevorzugte Lage und Orientierung des Sensors, Fig. 2 ein Anschluss-Schema des Gerätes in die elektrische Anlage eines Fahrzeuges, undFig. 1 shows a preferred position and orientation of the sensor, Fig. 2 is a connection diagram of the device in the electrical system of a vehicle, and
Fig. 3 das elektrische Schema einer Ausführungsform der Erfindung.Fig. 3 shows the electrical schematic of an embodiment of the invention.
Fig. 1 zeigt schematisch eine bevorzugte Lage des Sensors 1 bei nachträglichem Einbau des Gerätes sowie die Orientierung seines Lichteinfallfensters, welches beispielsweise einen Oeffnungswinkel von etwa 80º aufweist. Das Sensorgchäuse 2 kann natürlich auch in das Bordbrett eingebaut werden, und ausserdem sind andere Orientierungen der Photozelle möglich. So kann diese im Fall eines besonders grossen Heckfensters beispielsweise mehr gegen den Dachhimmel gerichtet sein.Fig. 1 shows schematically a preferred position of the sensor 1 when the device is subsequently installed and the orientation of its light incidence window, which for example has an opening angle of approximately 80 °. The sensor housing 2 can of course also be installed in the toe board, and other orientations are also the Photo cell possible. In the case of a particularly large rear window, for example, it can be directed more towards the headlining.
Wie in Fig. 2 gezeigt, kann das Schaltgerät in die bestehende Lichteinlage eines Fahrzeugs eingebaut werden, ohne irgendwelche Leitungen dieser Anlage durchzutrennen. In Fig.2 sind der Sensor 1 und die zugehörige Steuerschaltung in einem Gehäuse 2 untergebracht. Die Ziffern 3 und 4 bezeichnen Lichtschalter und Zündschloss des Fahrzeugs, 5-7 Anschlüsse an die Bordbatterie, welche je nach Fahrzeugtyp untereinander kurzgeschlossen sein können, und 8 den An-schluss für die über das Zündschloss gespiesenen elektrischen Verbraucher im Fahrzeug. Der Lichtschalter 3 des Fahrzeugs weist in üblicher Weise zwei Ausgänge auf, von denen für die allgemeine Aussenbeleuchtung (Positionsleuchten, Nummernschildleuchtung etc.) und c für die Scheinwerfer bestimmt ist. Dem Ausgang c ist dann meist ein (nicht gezeigter) Umschalter für Fernlicht und Abblendlicht nachgeschaltet. Das Schaltgerät wird über eine am Ausgang e des Zünd-schlosses 4 liegende Eingangsleitung gespiesen, so dass es bei ausgeschalteter Zündung keinen Strom verbraucht. Bei eingeschalteter Zündung und geringer Umgebungshelligkeit wird das Gerät über die Leitungen 12 und 13 den Lichtschalter überbrücken und somit die allgemeine Aussenbeleuchtung, sowie wahlweise die Fern- oder Abblendlichter des Fahrzeugs speisen. Aus der Fig. 2 ist ersichtlich, dass bei Nichtbe-nützung des Schaltgerätes der Lichtschalter 3 voll funktionsfähig bleibt, da die Leitungen der ursprünglichen Lichtanlage nur abgezapft, nirgends aber durchgetrennt werden.As shown in Fig. 2, the switching device can be installed in the existing light insert of a vehicle without cutting any lines of this system. 2, the sensor 1 and the associated control circuit are accommodated in a housing 2. Numbers 3 and 4 designate the light switch and ignition lock of the vehicle, 5-7 connections to the on-board battery, which can be short-circuited to each other depending on the vehicle type, and 8 the connection for the electrical consumers in the vehicle powered by the ignition lock. The light switch 3 of the vehicle has two outputs in the usual way, one of which is intended for general exterior lighting (position lights, license plate lighting, etc.) and c for the headlights. The output c is then usually followed by a switch (not shown) for high beam and low beam. The switching device is supplied via an input line at the output e of the ignition lock 4, so that it does not consume any current when the ignition is switched off. When the ignition is switched on and the ambient brightness is low, the device will bypass the light switch via lines 12 and 13 and thus feed the general exterior lighting, as well as optionally the high or low beams of the vehicle. It can be seen from FIG. 2 that the light switch 3 remains fully functional when the switching device is not in use, since the lines of the original lighting system are only tapped, but are not cut anywhere.
Es soll nun anhand der Fig. 3 eine Ausführungsform der erfindungsgemässen Schaltung beschrieben werden. Eine Photozeile 20 empfängt, über einen Diffusor 21, indirektes Licht aus dem Fahrzeuginneren. Die Empfindlichkeit der Pho tozelle kann mit einem Trimm-Potentiometer 22 eingestellt werden. Die Speisung von Photozelle und Schaltung erfolgt über den am Ausgang e des Zündschlosses (Fig. 2) angeschlos senen Eingang 23 des Schaltgerätes, und zwar über einen Hauptschalter 24, welcher im Normalbetrieb stets leitend ist, sowie über einen Transistor 25, dessen Basis über einen Kondensator 26, mit einer Kapazität von beispielsweise 100μF, gesteuert ist. Die dadurch bewirkte Verzögerung von etwa 2 Sekunden zwischen dem Einschalten der Zündung und dem Inbetriebsetzen des Schaltgerätes vermeidet, dass bei Dunkelheit die Lichtanlage des Fahrzeugs durch Anlasser und Beleuchtung gleichzeitig belastet wird. Ohne diese Verzögerung würde - wie aus dem weiter unten gesagten folgt - beim Star-ten des Fahrzeugs in der Dunkelheit seine Beleuchtung Bruchteile von Sekunden nach dem Einschalten der Zündung eingeschaltet, d.h. in der Regel bei laufendem Anlasser, was eine unnötige Belastung der Batterie bedeutet . Eine am Eingang des Gerätes vorgesehene Diode 27 dient dem Verpolungsschütz, während eine Leuchtdiode 28 den Betrieb des Gerätes anzeigt und eine Zener-Diode 29 seine Versorgungs-Spannung auf beispielsweise 9 V stabilisiert. Die Photozelle 20 steuert einen Operationsverstärker 30 (der beispielsweise dem internationalen Typ UA 741 P entsprechen kann), und dem eine Diode 31 und die Basis eines ersten NPN-Transistors nachgeschaltet sind, dessen Emitter mit der Basis eines zweiten NPN-Transistors 33 verbunden ist. Beim Absinken der Aussenbeleuchtung unter einen gewissen, am Trimmer 22 einstellbaren Wert, steuert die Photozelle 20 den Operationsverstärker 30 so, dass der erste Transistor durchschaltet. Da dessenAn embodiment of the circuit according to the invention will now be described with reference to FIG. 3. A photo line 20 receives, indirectly via a diffuser 21 Light from inside the vehicle. The sensitivity of the photocell can be adjusted with a trim potentiometer 22. The photocell and circuit are supplied via the input 23 of the switching device connected to the output e of the ignition lock (FIG. 2), specifically via a main switch 24, which is always conductive in normal operation, and via a transistor 25, the base of which is via a Capacitor 26, with a capacitance of 100μF, for example, is controlled. The resulting delay of about 2 seconds between switching on the ignition and starting up the switching device prevents the lighting system of the vehicle from being simultaneously stressed by the starter and lighting in the dark. Without this delay - as follows from what is said below - when the vehicle is started in the dark, its lighting would be switched on for a fraction of a second after the ignition was switched on, usually with the starter running, which means that the battery is unnecessarily charged. A diode 27 provided at the input of the device serves to reverse polarity protection, while a light-emitting diode 28 indicates the operation of the device and a Zener diode 29 stabilizes its supply voltage to, for example, 9 V. The photocell 20 controls an operational amplifier 30 (which may correspond, for example, to the international type UA 741 P) and which is followed by a diode 31 and the base of a first NPN transistor whose emitter is connected to the base of a second NPN transistor 33. When the exterior lighting drops below a certain value that can be set on the trimmer 22, the photocell 20 controls the operational amplifier 30 such that the first transistor switches on. Because of that
Basis jedoch über einen Kondensor 34 (von beispielsweise 50μF) mit der Hasse, respektive dem negativen Eingang desHowever, based on a condenser 34 (of, for example, 50μF) with the hate or the negative input of the
Schaltgerätes verbunden ist, wird dieser erste Transistor erst nach dem Aufladen des Kondensors 34, d.h. mit einer ge wissen Verzögerung gegenüber dem von der Photozelle abgegebenen Signal durchschalten und erst dann den zweiten Transistor 33 leitend machen. Dadurch wird ein an dessen Kollektor angeschlossenes Relais 35 mit Arbeitskontakten betätigt, der dann über die Leitungen 11 und 12 die allgemeine Beleuchtung und den Wählschalter für Fern- und Abblendlicht, unabhängig voneinander, versorgt. Bei wieder zunehmender Aussenbeleuchtung wird der erste Transistor 32 durch die Photozelle 20 und den Operationsverstärker 30 grundsätzlich so gesteuert, dass er beim Erreichen einer gewissen Beleuchtungsstärke wieder sperrt, und somit, über den zweiten Transistor und das Relais 35 die Fahrzeugbeleuchtung abschaltet. Da sich aber der Kondensor 34 nur über die Basis des ersten Transistors 32 entladen kann, sinkt die Spannung an dieser Basis nur langsam, und das Sperren des Transistors wird um einen Zeitintervall verzögert, welcher ein Mehrfaches der durch denselben Kondensator 34 bewirkten Einεchaltverzögerung beträgt. Eine Diode 36 ist zwischen der Speise-Spannung und dem Kollektor des zweiten Transistors 33 geschaltet, um letzteren vor den induktiven Strömen aus der Spule des Relais zu schützen. Eine weitere Leuchtdiode 38 zeigt an, ob der zweite Transistor durchgeschaltet und die Lichter somit eingeschaltet sind. Ausserdem ist in üblicher Weise ein Hochfrequenz-Störschutz Kondensor 37 parallel zum Relais vorgesehen.Switching device is connected, this first transistor is only after charging the capacitor 34, ie with a ge know switch through delay to the signal emitted by the photocell and only then make the second transistor 33 conductive. As a result, a relay 35 connected to its collector is actuated with work contacts, which then supplies the general lighting and the selector switch for high and low beam independently of one another via lines 11 and 12. When the exterior lighting increases again, the first transistor 32 is fundamentally controlled by the photocell 20 and the operational amplifier 30 such that it blocks again when a certain illuminance is reached, and thus switches off the vehicle lighting via the second transistor and the relay 35. However, since the condenser 34 can only discharge via the base of the first transistor 32, the voltage at this base drops only slowly, and the blocking of the transistor is delayed by a time interval which is a multiple of the switch-on delay caused by the same capacitor 34. A diode 36 is connected between the supply voltage and the collector of the second transistor 33 in order to protect the latter from the inductive currents from the coil of the relay. Another light-emitting diode 38 indicates whether the second transistor is switched on and the lights are thus switched on. In addition, a high-frequency interference protection condenser 37 is provided in parallel with the relay in the usual way.
Der Vollständigkeit halber sind noch die für ein einwandfreies Funktionieren der Schaltung notwendigen Widerstände eingezeichnet, deren Werte in Abhängigkeit der verwendeten Schaltelemente ohne weiteres vom Fachmann bestimmt werden können. For the sake of completeness, the resistors necessary for the circuit to function properly are also shown, the values of which, depending on the switching elements used, can be readily determined by a person skilled in the art.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Lichtempfindliches Schaltgerät für Fahrzeuge, mit einer von einem Photosensor gesteuerten Schaltung, um die Fahrzeugbeleuchtung in Abhängigkeit der Umgebungshelligkeit ein- und auszuschalten, dadurch gekennzeichnet ,dass der Sensor eine gegen das Fahrzeuginnere gerichtete Lichteinfallöffnung besitzt und dass die Schaltung eingerichtet ist um beim Ueberschreiten eines Schwellwertes der in den Sensor einfallenden Beleuchtungsstärke das durch das entsprechend veränderte Signal am Ausgang des Sensors bedingte Ein- und Ausschalten zeitlich zu verzögern, wobei die Ausschaltverzögerung mindestens das Zweieinhalbfache der Einschaltverzögerung beträgt.1. Photosensitive switching device for vehicles, with a circuit controlled by a photosensor in order to switch the vehicle lighting on and off depending on the ambient brightness, characterized in that the sensor has a light incidence opening directed towards the vehicle interior and that the circuit is set up so that when a Threshold value of the illuminance incident in the sensor to delay the switching on and off due to the correspondingly changed signal at the output of the sensor, the switch-off delay being at least two and a half times the switch-on delay.
2. Schaltgcrät nach Anspruch 1, dadurch gekennzeichnet, dass ein Diffusor in der Lichteinfallöffnung des Sensors angeordnet ist.2. Schaltgcrät according to claim 1, characterized in that a diffuser is arranged in the light incidence opening of the sensor.
3. Schaltgerät nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Einschaltverzögerung 0,5 bis 3 Sekunden und die Ausschaltverzögerung 10 bis 40 Sekunden beträgt. 3. Switching device according to one of the preceding claims, characterized in that the switch-on delay is 0.5 to 3 seconds and the switch-off delay is 10 to 40 seconds.
4. Schaltgerät nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen an der durch den Sensor gesteuerten Basis eines ersten Transistors angeschlossenen ersten Kondensators, dessen Auf- und Entladen die Ein- bzw. Ausschaltverzögerung bewirkt. 4. Switching device according to one of the preceding claims, characterized by a first capacitor connected to the sensor-controlled base of a first transistor, the charging and discharging of which causes the switch-on or switch-off delay.
5. Schaltgcrät nach Anspruch 4, gekennzeichnet durch einen an der Basis eines zweiten Transistors angeschlossenen zweiten Kondensor, dessen Aufladen das Durchschalten dieses Transistors um einen gewissen Betrag gegenüber dem Einschalten der Speisespannung des Gerätes verzögert, wobei der zweite Transistor so geschaltet ist, dass der Photosensor und die von ihm gesteuerte Schaltung erst nach dem Durchschclten dieses zweiten Transistors gespiesen werden.5. Schaltgcrät according to claim 4, characterized by a at the base of a second transistor connected second condenser, the charging delays the switching of this transistor by a certain amount compared to switching on the supply voltage of the device, the second transistor being switched so that the photosensor and the circuit controlled by him only after the This second transistor is fed through.
6. Schaltgerät nach einem der vorangehenden Ansprüche, gekennzeichnet durch ein vom Photosensor gesteuerte Relais mit zwei Arbeitskontakten zum Schalten zweier Be- leuchtungskreice des Fahrzeugs.6. Switching device according to one of the preceding claims, characterized by a relay controlled by the photosensor with two work contacts for switching two lighting circuits of the vehicle.
7. Schaltgerät nach einem der vorangehenden Ansprüche , gekennzeichnet durch einen in Serie mit dem Photosensor geschalteten Trimm-Potentiometer zum Einstellen des Schwellwertes . 7. Switching device according to one of the preceding claims, characterized by a trimming potentiometer connected in series with the photosensor for setting the threshold value.
EP19810901316 1980-05-19 1981-05-19 Light sensitive switch for a car Withdrawn EP0052124A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3870/80 1980-05-19
CH387080A CH628296A5 (en) 1980-05-19 1980-05-19 Photosensitive schaltgeraet on a vehicle.

Publications (1)

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EP0052124A1 true EP0052124A1 (en) 1982-05-26

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ID=4265253

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Application Number Title Priority Date Filing Date
EP19810901316 Withdrawn EP0052124A1 (en) 1980-05-19 1981-05-19 Light sensitive switch for a car

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EP (1) EP0052124A1 (en)
CH (1) CH628296A5 (en)
WO (1) WO1981003307A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1168251B (en) * 1980-12-19 1987-05-20 Fazio Giuseppe Di AUTOMATIC HEADLIGHT SWITCHING DEVICE FOR MOTOR VEHICLES
US5235178A (en) * 1991-10-03 1993-08-10 Hegyi Dennis J Light sensor with diffuser and eye-like response
US5416318A (en) * 1991-10-03 1995-05-16 Hegyi; Dennis J. Combined headlamp and climate control sensor having a light diffuser and a light modulator
DE102006060098B4 (en) * 2006-12-18 2010-01-21 Faurecia Innenraum Systeme Gmbh Operating mechanism for a storage compartment of a motor vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1345253A (en) * 1962-11-30 1963-12-06 Dott Ing Giuseppe Gallo S P A Improvements to automatic switching on and off systems for position lights or headlights of automobiles
US3315421A (en) * 1964-12-30 1967-04-25 Roy Clovis Collapsible trailer tent
DE1515909A1 (en) * 1965-12-15 1969-11-20 Stefan Jaworski Arrangement for controlling the city lights and taillights, possibly the parking lights of a motor vehicle
DE2260056A1 (en) * 1972-12-08 1974-06-12 Erhard Jaeger INDEPENDENT LIGHT SWITCH FOR MOTOR VEHICLES AND OTHER TRANSPORTATION
DE2656265A1 (en) * 1976-12-11 1978-06-15 Faller Ohg Brightness operated switch for vehicle lights - connects lights automatically using light sensors on entering dark tunnel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8103307A1 *

Also Published As

Publication number Publication date
CH628296A5 (en) 1982-02-26
WO1981003307A1 (en) 1981-11-26

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