EP4046464A1 - Procédé de pilotage des modules d'éclairage et de signalisation pour véhicules automobiles - Google Patents
Procédé de pilotage des modules d'éclairage et de signalisation pour véhicules automobilesInfo
- Publication number
- EP4046464A1 EP4046464A1 EP20785820.0A EP20785820A EP4046464A1 EP 4046464 A1 EP4046464 A1 EP 4046464A1 EP 20785820 A EP20785820 A EP 20785820A EP 4046464 A1 EP4046464 A1 EP 4046464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- intensity
- control method
- variation
- lighting
- 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.)
- Pending
Links
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
- B60Q1/1407—General lighting circuits comprising dimming circuits
-
- 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
- H05B45/34—Voltage stabilisation; Maintaining constant voltage
-
- 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
Definitions
- TITLE Method for controlling lighting and signaling modules for motor vehicles
- the invention relates to a method for controlling lighting and signaling modules with the aim of reducing energy consumption.
- the lighting and signaling modules (projector, daytime running lights, etc.) generally include a lighting source (halogen, xenon, LED lamp) controlled by an electronic card (PCB) and associated with various components optical (lens, reflector, etc.), the assembly being intended to be encapsulated in a housing.
- a lighting source halogen, xenon, LED lamp
- PCB electronic card
- optical lens, reflector, etc.
- LED headlamps and lights are often supplied and controlled with electric energy of constant power (stabilized current and constant voltage), this power (P) being determined by the product of the intensity (1) of the current and of voltage (U).
- Patent EP2741578B1 describes a control circuit and a method for driving LEDs consisting in delivering a signal intended to adjust the reference current source to thus vary the voltage of the output current within a determined range.
- the aim of the invention is to obtain, in one cycle, at a time, the attainment of optimal performance (range of lighting, perception of brightness, width of the beam, etc.). ) and, taking into account regulatory tolerances, a significant reduction in energy consumption without noticeable perception of the variations by the user of the vehicle, and without causing any deterioration in safety conditions.
- a method for controlling a motor vehicle lighting module comprising at least one light emitting diode (LED) supplied by a direct electric current, characterized in that that the intensity of the current is varied sinusoidally, at constant voltage, with an oscillation period of between 30s and 60s.
- LED light emitting diode
- the intensity of the current is varied between 0.7 A and 1.1 A.
- the variation in amplitude of the oscillations is less than or equal to 20%.
- Another object of the invention is a device for implementing the control method defined above from a direct current delivered by an on-board battery, characterized in that it comprises an electronic circuit converting direct current (DC) into alternating current (AC) intended to supply the vehicle's lighting and signaling modules.
- DC direct current
- AC alternating current
- Yet another object of the invention is an energy-saving motor vehicle equipped with lighting and signaling modules controlled with the method according to one of the preceding claims.
- the sinusoidal function of the intensity of the current is a function simple to obtain by the traditional methods of converting AC / DC signals which is derivable and continuous and which does not induce, for an observer , significant modification of the visual appearance of the light beam.
- the invention is of significant technical and economic interest because, thanks to the piloting process, it is possible to obtain an energy saving of about 10%.
- the intensity of the current varies within a range of values lower than the intensity of the stabilized currents (generally 0.8A) which allows a reduction in the number of LEDs, and, consequently, a reduction in the cost of lighting modules.
- FIG. 1 is a graph representing a stable power supply profile (current Io and voltage Uo) as a function of time t (in seconds s).
- FIG. 2 is a graph representing a sinusoidal power supply profile according to the method of the invention with a variable intensity (1) and a maximum current reduction amplitude of k (%) over the same period To of time t as in FIG. 1.
- FIG. 3 is an overall diagram of a device capable of ensuring the implementation of the method of the invention for controlling the lighting modules.
- FIG. 4 shows an embodiment of an electronic circuit capable of generating a sinusoidal control signal from a direct current signal.
- the method of the invention is intended for controlling a lighting and / or signaling module of a motor vehicle with the aim of saving energy.
- Such a module 3 shown schematically in Figure 3 (for example, a projector) comprises, in general, at least one light source such as a light emitting diode (LED) supplied by a direct electric current and stabilized delivered by an on-board battery 1.
- a current the voltage U of which is generally 12V
- FIG. 1 illustrates a profile which is illustrated by FIG. 1.
- the control method of the invention consists in modifying the profile of the supply current of the lighting modules by varying the intensity of the current sinusoidally with a long period of oscillation (To) of between 30s and 60s. Under these conditions, the power oscillations are neither perceptible nor annoying for the driver of the vehicle or for the drivers of other vehicles.
- FIG. 2 The specific profile according to the method of the invention for supplying electrical power to the module is illustrated in FIG. 2.
- This power variation complies, from a regulatory point of view, with the permitted variation ranges and can be obtained by means of traditional oscillators such as.
- the sinusoidal profile of the current variations can be generalized by approximation by means of mathematical functions integrating polynomials, splines, etc., ... by providing technical effects similar to those produced by the sinusoidal function (A).
- a system allowing an implementation of the control method of the invention is schematically illustrated in Figure 3.
- the main power source consists of the battery 1 of the vehicle which delivers a stabilized direct current (DC) which the voltage Uo is 12V.
- alternating current signal AC
- driver a converter 2 (or “driver") comprising an electronic circuit of the type shown in FIG. 4.
- the alternating signal is then sent to the lighting and signaling modules 3 and, in particular, to the headlamps and to the light-emitting diode lights 4 (LEDs), as illustrated by Figures 3 and 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1911633A FR3102334B1 (fr) | 2019-10-17 | 2019-10-17 | Procédé de pilotage des modules d’éclairage et de signalisation pour véhicules automobiles |
| PCT/FR2020/051637 WO2021074496A1 (fr) | 2019-10-17 | 2020-09-21 | Procédé de pilotage des modules d'éclairage et de signalisation pour véhicules automobiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4046464A1 true EP4046464A1 (fr) | 2022-08-24 |
Family
ID=69699985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20785820.0A Pending EP4046464A1 (fr) | 2019-10-17 | 2020-09-21 | Procédé de pilotage des modules d'éclairage et de signalisation pour véhicules automobiles |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4046464A1 (fr) |
| CN (1) | CN114557131B (fr) |
| FR (1) | FR3102334B1 (fr) |
| WO (1) | WO2021074496A1 (fr) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4171127B2 (ja) * | 1999-03-01 | 2008-10-22 | スタンレー電気株式会社 | 自動車用ヘッドランプ装置 |
| CN1589078A (zh) * | 2004-08-09 | 2005-03-02 | 武汉理工大学 | 一种发光二极管光源 |
| EP2311298B1 (fr) * | 2008-01-30 | 2018-12-19 | Nxp B.V. | Procédé et agencement de circuit de e régulation d'un courant del traversant un circuit del, et composition de circuit et système d'éclairage connexe |
| DE102009024352A1 (de) | 2009-06-09 | 2010-12-16 | Automotive Lighting Reutlingen Gmbh | Verfahren zum Betreiben einer Beleuchtungseinrichtung |
| CN201956907U (zh) * | 2011-04-03 | 2011-08-31 | 阮小青 | 直流低压电源双桥振荡电子变压器 |
| FR2977207B1 (fr) * | 2011-06-28 | 2016-07-15 | Valeo Vision | Dispositif d'eclairage et/ou de signalisation d'un vehicule automobile et procede de fonctionnement d'un tel dispositif d'eclairage et/ou de signalisation. |
| FR2983143B1 (fr) | 2011-11-24 | 2014-08-08 | Renault Sa | Commande de systeme d'eclairage de vehicule |
| FR2983435B1 (fr) * | 2011-12-05 | 2014-01-24 | Peugeot Citroen Automobiles Sa | Procede de gestion de l'energie electrique d'un vehicule automobile et vehicule automobile mettant en oeuvre un tel procede |
| EP2741578B1 (fr) | 2012-12-07 | 2017-06-07 | Nxp B.V. | Contrôle actuelle et de contrôle de gradation du courant des DELs en utilisant d'un comparateur avec deux seuils d'hystérésis |
| US9466988B2 (en) * | 2014-03-08 | 2016-10-11 | Feniex Industries Inc. | Induction power transfer for auxiliary vehicle lights |
| CN104535172B (zh) * | 2015-01-12 | 2018-02-13 | 山东大学 | 一种利用发光二极管阵列实现微悬臂梁高阶共振激发的方法及应用 |
| EP3280228B1 (fr) * | 2016-08-01 | 2019-07-10 | OSRAM GmbH | Système d'éclairage et procédé de commande d'un système d'éclairage |
| CN107135582A (zh) * | 2017-07-04 | 2017-09-05 | 黄燕耀 | 一种led供电电路直流供电的方法及装置 |
| CN108357592A (zh) * | 2018-03-09 | 2018-08-03 | 北京汉能光伏投资有限公司 | 车载电源、车辆照明系统及其供电方法 |
-
2019
- 2019-10-17 FR FR1911633A patent/FR3102334B1/fr active Active
-
2020
- 2020-09-21 WO PCT/FR2020/051637 patent/WO2021074496A1/fr not_active Ceased
- 2020-09-21 EP EP20785820.0A patent/EP4046464A1/fr active Pending
- 2020-09-21 CN CN202080072562.0A patent/CN114557131B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3102334A1 (fr) | 2021-04-23 |
| CN114557131B (zh) | 2025-08-05 |
| WO2021074496A1 (fr) | 2021-04-22 |
| FR3102334B1 (fr) | 2022-04-29 |
| CN114557131A (zh) | 2022-05-27 |
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