DE102013001273A1 - Method for controlling headlight in motor car, involves increasing light intensity emitted from LED if cutoff-current is lowered below first value, and reducing light intensity emitted from LED if cutoff-current is larger than second value - Google Patents
Method for controlling headlight in motor car, involves increasing light intensity emitted from LED if cutoff-current is lowered below first value, and reducing light intensity emitted from LED if cutoff-current is larger than second value Download PDFInfo
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- DE102013001273A1 DE102013001273A1 DE201310001273 DE102013001273A DE102013001273A1 DE 102013001273 A1 DE102013001273 A1 DE 102013001273A1 DE 201310001273 DE201310001273 DE 201310001273 DE 102013001273 A DE102013001273 A DE 102013001273A DE 102013001273 A1 DE102013001273 A1 DE 102013001273A1
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- light
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- 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
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- 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
- B60Q1/0017—Devices integrating an element dedicated to another function
- B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- 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
- B60Q2300/32—Road surface or travel path
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Regelung eines Scheinwerfers in einem Kraftfahrzeug, wobei in den Scheinwerfern mehrere ansteuerbare lichtemittierende Dioden angeordnet sind.The invention relates to a method for controlling a headlight in a motor vehicle, wherein a plurality of controllable light-emitting diodes are arranged in the headlights.
Es sind bereits Verfahren zur Steuerung von Scheinwerfern bekannt, welche die Helligkeit des von den Scheinwerfern emittierten Lichts abhängig von Parametern wie zum Beispiel einer Fahrzeuggeschwindigkeit einstellt. Bei Nässe und unterschiedlichen Beschaffenheiten der Fahrbahn ändert sich die Reflexionsgrade der Straße, so dass die Helligkeit des reflektierten Lichts in weiten Bereichen variiert.There are already known methods for controlling headlamps, which adjusts the brightness of the light emitted by the headlamps depending on parameters such as a vehicle speed. When wet and different road conditions, the reflectance of the road changes, so that the brightness of the reflected light varies widely.
Eine der Erfindung zugrunde liegende Aufgabe besteht darin, ein Verfahren zur Regelung eines Scheinwerfers bereitzustellen, welches zumindest für das menschliche Auge den Eindruck einer gleichbleibenden Helligkeit des von den Scheinwerfern ausgeleuchteten Bereichs sorgt.An object of the invention is to provide a method for controlling a headlamp, which gives the impression of a constant brightness of the area illuminated by the headlamps, at least for the human eye.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche. Diese können in technologisch sinnvoller Weise miteinander kombiniert werden. Die Beschreibung, insbesondere im Zusammenhang mit der Zeichnung, charakterisiert und spezifiziert die Erfindung zusätzlich.This object is solved by the features of
Vorgesehen ist demgemäß ein Verfahren zur Regelung eines Scheinwerfers in einem Kraftfahrzeug, wobei in den Scheinwerfern mehrere ansteuerbare lichtemittierende Dioden angeordnet sind, mit den Schritten:
- – Beaufschlagen mindestens einer Diode mit einer Spannung entgegen einer Durchleitrichtung,
- – Erfassen eines an der Diode anliegenden Sperrstroms,
- – Erhöhen einer von einer Diode emittierten Lichtintensität, falls der Sperrstrom einen ersten Wert unterschreitet, und
- – Verringern der Lichtintensität, falls der Sperrstrom größer ist als ein zweiter Wert.
- Applying at least one diode with a voltage opposite to a conducting direction,
- Detecting a reverse current applied to the diode,
- Increasing a light intensity emitted by a diode if the reverse current falls below a first value, and
- - Reduce the light intensity, if the reverse current is greater than a second value.
Durch dieses Verfahren reagieren die lichtemittierenden Dioden bei einer entsprechend hoch gewählten Frequenz verhältnismäßig dynamisch, insbesondere für das menschliche Auge unsichtbar, auf unterschiedliche Reflexionsgrade der Straße. Eine Diode emittiert Licht, welches reflektiert wird. Das reflektierte Licht wird von einer anderen, insbesondere einer benachbarten Diode, welche gleichzeitig mit einer Spannung entgegen ihrer Durchleitrichtung beaufschlagt wird, erfasst. Dies erfolgt in einer verhältnismäßig hohen, jedenfalls für das menschliche Auge nicht wahrnehmbaren Frequenz von über 50 Hz, insbesondere über 60 Hz. Die wahrgenommene Helligkeit wird damit hochdynamisch an den Reflexionsgrad der Straße angepasst, indem die Lichtintensität so gesteuert wird, dass der Sperrstrom stets zwischen dem ersten Wert und dem zweiten Wert liegt. Dabei handelt es sich bei der Helligkeit um eine von dem menschlichen Auge erfassbare Größe, da das Auge ab einer gewissen Frequenz nicht mehr in der Lage ist, zwischen einzelnen kurzen Lichtblitzen und einer stetigen Helligkeit zu differenzieren.By this method, the light-emitting diodes react at a correspondingly highly selected frequency relatively dynamically, especially invisible to the human eye, to different reflectances of the road. A diode emits light, which is reflected. The reflected light is detected by another, in particular an adjacent diode, which is acted upon simultaneously with a voltage opposite to its direction of conduction. This is done in a relatively high, at least not perceptible to the human eye frequency of about 50 Hz, especially about 60 Hz. The perceived brightness is thus highly dynamically adapted to the reflectance of the road by the light intensity is controlled so that the reverse current always between the first value and the second value. The brightness is a variable that can be detected by the human eye, since from a certain frequency the eye is no longer able to differentiate between individual short flashes of light and a steady brightness.
In einer Ausgestaltung sind die Dioden gruppenweise in Lichtmodulen angeordnet.In one embodiment, the diodes are arranged in groups in light modules.
Durch diese Ausgestaltung kann die Helligkeit nicht nur global, sondern für unterschiedliche, von den einzelnen lichtemittierenden Dioden ausgeleuchtete Bereiche gezielt eingestellt werden. Damit erzeugen die Scheinwerfer einen Lichtkegel, welcher für den Fahrer des Kraftfahrzeuges den Eindruck einer homogenen Lichtintensität im ausgeleuchteten Bereich erweckt.With this configuration, the brightness can be adjusted not only globally, but for different, illuminated by the individual light-emitting diodes areas targeted. Thus, the headlights produce a beam of light, which gives the driver of the motor vehicle the impression of a homogeneous light intensity in the illuminated area.
In einer weiteren Ausgestaltung wird die Lichtintensität von Dioden eines Lichtelements gemeinsam abhängig von dem Sperrstrom einer in dem betreffenden Lichtmodul angeordneten Diode gesteuert.In a further refinement, the light intensity of diodes of a light element is jointly controlled as a function of the reverse current of a diode arranged in the relevant light module.
Die gruppenweise Anordnung von Dioden in einem Lichtmodul ermöglicht ein Detektieren von reflektiertem Licht, welches auch von dem gerade leuchtenden Dioden des entsprechenden Lichtmodul emittiert wird.The arrayed arrangement of diodes in a light module enables detection of reflected light, which is also emitted by the currently lit diodes of the corresponding light module.
Entsprechend einer weiteren Ausgestaltung wird die Lichtintensität über eine Pulsweitenmodulation gesteuert, wobei die Dioden zwischen einzelnen Pulsen mit der Spannung entgegen der Durchleitrichtung beaufschlagt werden.According to a further embodiment, the light intensity is controlled by a pulse width modulation, wherein the diodes between individual pulses with the voltage are applied against the passage direction.
Dadurch können die Dioden bidirektional betrieben werden, d. h. sowohl zum Detektieren von Licht als auch zum Emittieren von Licht. Dies kann wie bereits beschrieben verhältnismäßig rasch und für das menschliche Auge ohne Hilfsmittel nicht sichtbar erfolgen.This allows the diodes to be bidirectionally operated, i. H. both for detecting light and for emitting light. As already described, this can be done relatively quickly and not visible to the human eye without aids.
Das beschriebene Verfahren sowie die vorteilhaften Ausgestaltungen können in einem Kraftfahrzeug, insbesondere in einer Steuereinheit zur Steuerung eines Scheinwerfers implementiert sein.The method described and the advantageous embodiments can be implemented in a motor vehicle, in particular in a control unit for controlling a headlight.
Zur Durchführung eines Verfahrens geeignet ist ein Computerprogramm, welches Programmcode-Mittel aufweist, um alle Schritte von jedem beliebigen der Ansprüche durchzuführen, wenn das Programm auf einem Computer ausgeführt wird.Suitable for performing a method is a computer program having program code means for performing all the steps of any one of the claims when the program is run on a computer.
Das Computerprogramm kann mit einfachen Mitteln in bereits bestehende Steuereinheiten eingelesen und verwendet werden, um einen Scheinwerfer zu steuern.The computer program can be easily integrated into existing control units be read in and used to control a headlight.
Hierfür vorgesehen ist ein Computerprogrammprodukt mit Programmcode-Mitteln, die auf einem computerlesbaren Datenträger gespeichert sind, um das Verfahren nach jedem beliebigen der Ansprüche durchzuführen, wenn das Programmprodukt auf einem Computer ausgeführt wird. Das Computerprogrammprodukt kann als auch Nachrüstoption in Steuereinheiten integriert werden.Provided for this purpose is a computer program product with program code means, which are stored on a computer-readable data carrier in order to carry out the method according to any of the claims, when the program product is executed on a computer. The computer program product can be integrated as a retrofit option in control units.
Ein weiterer Aspekt der Erfindung betrifft einen Apparat zur Regelung eines Scheinwerfers in einem Kraftfahrzeug, wobei in den Scheinwerfern mehrere ansteuerbare lichtemittierende Dioden angeordnet sind, umfassend:
- – Mittel zum Beaufschlagen mindestens einer Diode mit einer Spannung entgegen einer Durchleitrichtung,
- – Mittel zum Erfassen eines an der Diode anliegenden Sperrstroms,
- – Mittel zum Erhöhen einer von der Diode emittierten Lichtintensität, falls der Sperrstrom einen ersten Wert unterschreitet, und
- – Mittel zum Verringern der Lichtintensität, falls der Sperrstrom größer ist als ein zweiter Wert.
- Means for applying at least one diode with a voltage opposite to a conducting direction,
- Means for detecting a reverse current applied to the diode,
- - means for increasing a light intensity emitted by the diode if the reverse current falls below a first value, and
- - Means for reducing the light intensity, if the reverse current is greater than a second value.
Bei einer Ausführungsform des Apparats sind die Dioden gruppenweise in Lichtmodulen angeordnet.In one embodiment of the apparatus, the diodes are arranged in groups in light modules.
Eine Ausbildung des Apparats besteht darin, dass die Lichtintensität von Dioden eines Lichtelements gemeinsam abhängig von dem Sperrstrom einer in dem betreffenden Lichtmodul angeordneten Diode gesteuert wird.An embodiment of the apparatus consists in that the light intensity of diodes of a light element is jointly controlled as a function of the reverse current of a diode arranged in the relevant light module.
Bei einer weiteren Ausführungsform des Apparats wird die Lichtintensität über eine Pulsweitenmodulation gesteuert, wobei die Dioden zwischen einzelnen Pulsen mit der Spannung entgegen der Durchleitrichtung beaufschlagt werden.In a further embodiment of the apparatus, the light intensity is controlled by a pulse width modulation, wherein the diodes between individual pulses are applied to the voltage opposite to the transmission direction.
Nachfolgend werden einige Ausführungsbeispiele anhand der Zeichnung näher erläutert. Es zeigen:Some embodiments will be explained in more detail with reference to the drawing. Show it:
In den Figuren sind gleiche oder funktional gleichwirkende Bauteile mit gleichen Bezugszeichen versehen.In the figures, identical or functionally identical components are provided with the same reference numerals.
Das Kraftfahrzeug
Um eine räumliche Trennung der Lichtverteilung auf der Straße
Dabei wird das Licht ggf. über eine Streulinse
In den vorgeschlagenen weißen lichtemittierenden Dioden
Die lichtemittierenden Dioden
Es ist vorgesehen, dass das Kraftfahrzeug
Die Steuereinheit
Durch die Pulsweitenmodulation können die Dioden
Lautet die Antwort auf die Abfrage
Lautet die Antwort auf die Abfrage
Gleichwohl in der vorangegangenen Beschreibung einige mögliche Ausführungen der Erfindung offenbart wurden, versteht es sich, dass zahlreiche weitere Varianten von Ausführungen durch Kombinationsmöglichkeiten aller genannten und ferner aller dem Fachmann naheliegenden technischen Merkmale und Ausführungsformen existieren. Es versteht sich ferner, dass die Ausführungsbeispiele lediglich als Beispiele zu verstehen sind, die den Schutzbereich, die Anwendbarkeit und die Konfiguration in keiner Weise beschränken. Vielmehr möchte die vorangegangene Beschreibung dem Fachmann einen geeigneten Weg aufzeigen, um zumindest eine beispielhafte Ausführungsform zu realisieren. Es versteht sich, dass bei einer beispielhaften Ausführungsform zahlreiche Änderungen bezüglich Funktion und Anordnung der Elemente vorgenommen werden können, ohne den in den Ansprüchen offenbarten Schutzbereich und dessen Äquivalente zu verlassen.Although some possible embodiments of the invention have been disclosed in the foregoing description, it is to be understood that numerous other variants of embodiments exist through the possibility of combining all of the cited and further all of the obvious technical features and embodiments. It is further understood that the embodiments are to be understood as examples only, which in no way limit the scope, applicability and configuration. Rather, the foregoing description would suggest a suitable way for the skilled person to realize at least one exemplary embodiment. It should be understood that in an exemplary embodiment, numerous changes in the function and arrangement of the elements may be made without departing from the scope and equivalents disclosed in the claims.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- StraßeStreet
- 22
- Kraftfahrzeugmotor vehicle
- 33
- Lichtmodullight module
- 44
- Scheinwerferheadlights
- 55
- Lichtkegellight cone
- 66
- Diodediode
- 6'6 '
- Diodediode
- 77
- Steuereinheitcontrol unit
- 88th
- Streulinsediffusing lens
- 99
- BereichArea
- 1010
- PulsPulse
- 10'10 '
- PulsPulse
- 1111
- Startbegin
- 1212
- Schrittstep
- 1313
- Schrittstep
- 1414
- Abfragequery
- 1515
- Schrittstep
- 1616
- EndeThe End
- 1717
- Abfragequery
- 1818
- Schrittstep
- tt
- ZeitTime
- UU
- Spannungtension
- U1U1
- Spannung in DurchleitrichtungVoltage in forward direction
- U2U2
- Spannung entgegen der DurchleitrichtungTension against the direction of passage
Claims (7)
Priority Applications (1)
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DE201310001273 DE102013001273A1 (en) | 2013-01-25 | 2013-01-25 | Method for controlling headlight in motor car, involves increasing light intensity emitted from LED if cutoff-current is lowered below first value, and reducing light intensity emitted from LED if cutoff-current is larger than second value |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201310001273 DE102013001273A1 (en) | 2013-01-25 | 2013-01-25 | Method for controlling headlight in motor car, involves increasing light intensity emitted from LED if cutoff-current is lowered below first value, and reducing light intensity emitted from LED if cutoff-current is larger than second value |
Publications (1)
Publication Number | Publication Date |
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DE102013001273A1 true DE102013001273A1 (en) | 2014-07-31 |
Family
ID=51163115
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DE201310001273 Withdrawn DE102013001273A1 (en) | 2013-01-25 | 2013-01-25 | Method for controlling headlight in motor car, involves increasing light intensity emitted from LED if cutoff-current is lowered below first value, and reducing light intensity emitted from LED if cutoff-current is larger than second value |
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Cited By (8)
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DE102017121110B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | Illuminators and methods of generating short pulses of light therefrom and applications thereof |
DE102017121112B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | Light-pulse-capable headlight |
DE102017121109B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | LED floodlight for data transmission purposes and method of use |
DE102017121113B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | LED floodlight for measurement and data transmission purposes and method of use |
DE102018120639A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED floodlight with high pulsed LED operating voltages for measurement and data transmission purposes and method of use |
DE102018120283A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | Method of operating a data-capable LED headlamp with high pulsed LED operating voltages |
DE102018120271A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED H-bridge operation with high pulsed operating voltages |
DE102017121114B4 (en) | 2017-09-12 | 2020-08-06 | Elmos Semiconductor Aktiengesellschaft | Method for operating an H-bridge to generate short light pulses using an LED lamp |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102017121110B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | Illuminators and methods of generating short pulses of light therefrom and applications thereof |
DE102017121112B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | Light-pulse-capable headlight |
DE102017121109B3 (en) | 2017-09-12 | 2018-12-27 | Elmos Semiconductor Aktiengesellschaft | LED floodlight for data transmission purposes and method of use |
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DE102018120639A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED floodlight with high pulsed LED operating voltages for measurement and data transmission purposes and method of use |
DE102018120251A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | Light-pulsed illumination headlight |
DE102018120283A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | Method of operating a data-capable LED headlamp with high pulsed LED operating voltages |
DE102018120286A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED spotlight with distance measuring capability by means of high pulsed LED operating voltages |
DE102018120263A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | H-bridge and method of operation thereof in an LED headlamp by means of an LED illuminant and high pulsed operating voltages and method of operation thereof |
DE102018120245A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | H-bridge for generating short light pulses by means of an LED light source and high pulsed operating voltages and method for their operation |
DE102018120271A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED H-bridge operation with high pulsed operating voltages |
DE102018120653A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | Light-pulse-capable headlamp with high pulsed LED operating voltages |
DE102018120539A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | LED spotlights for lighting and method for generating short pulses of light using high pulsed LED operating voltages and applications for use thereof |
DE102018120624A1 (en) | 2017-09-12 | 2019-03-14 | Elmos Semiconductor Aktiengesellschaft | Light pulse capable LED headlamp with high pulsed LED operating voltages for data transmission purposes and method of use |
DE102017121114B4 (en) | 2017-09-12 | 2020-08-06 | Elmos Semiconductor Aktiengesellschaft | Method for operating an H-bridge to generate short light pulses using an LED lamp |
DE102018120271B4 (en) | 2017-09-12 | 2023-09-07 | Elmos Semiconductor Se | LED H-bridge operating method with high pulsed operating voltages |
DE102018120245B4 (en) | 2017-09-12 | 2024-02-15 | Elmos Semiconductor Se | H-bridge for generating short light pulses using an LED lamp and high pulsed operating voltages and methods for their operation |
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