DE102011119382A1 - Lighting device, particularly headlamp, for motor vehicle for generating one or multiple certain light functions, has two light sources, by which light beams are generated, where light beams are associated to light function - Google Patents

Abstract

The lighting device (1) has two light sources, by which the light beams are generated, where the light beams are associated to a light function. The generated light beams are deflected by one of the light sources over a reflector and are supplemented with the generated light beams to an overall-light distribution. One of the light sources is formed as a light module with a lens.

Description

The invention relates to a lighting device according to the preamble of patent claim 1.

Such a lighting device is known from DE 10 2007 008 403 A1 known. Specifically, there is described a lighting device having a plurality of reflector chambers, wherein each reflector chamber is associated with an LED as a light source. The reflected by the reflectors light of the LEDs each forms a single light distribution and can be used alone or in combination with the other single light distribution, if necessary, to a (total) light distribution of certain light functions, such as dimming, remote, fog, cornering and the like can be used.

The individual reflector chambers can be arranged in any desired manner to each other and combined with each other. In this way, in addition to a small depth or good adaptability to the space and new design options for both the day and the night design.

It can be seen from the document that high demands are placed on modern lighting devices, both in terms of their functionality and their individualisability (day and night design).

The present invention has for its object to provide an alternative lighting device that goes new ways with high functionality in terms of appearance.

This object is achieved with the features of claim 1. Advantageous developments of the invention can be found in the dependent claims.

The invention relates to a lighting device, in particular a headlight, for a motor vehicle for generating one or more specific light functions, with at least two light sources, can be generated by the at least one light function assignable light beams or generated, the generated or generated light beams at least from one of the bulbs are deflected or deflected via at least one reflector and can be supplemented or supplemented with the producible or generated light beams of at least one other light source to form an overall light distribution.

According to the invention, it is proposed that at least one of the lighting means is designed as a light module having a lens.

Thus, the present invention combines or superimposes the reflection principle with the projection principle. As a result, it is possible to reliably generate individual light distributions which, if necessary, can also be combined with one another to form an overall light distribution. At the same time, the lighting device is given a distinctive design by this novel design.

According to a first advantageous development of the invention, it is provided that the light beams deflected via the reflector are generated by at least one semiconductor light source, preferably by at least one light-emitting diode (LED).

The at least one LED can be part of a single chip or a multi-chip LED module. In a single chip, an LED is arranged on a chip or on a circuit board. The basic building blocks of a multi-chip LED module are individual LEDs which are interconnected in a matrix and applied to a circuit board, for example a ceramic plate. The advantage of multichip LEDs compared to large-area single-chip LEDs with approximately the same luminous flux lies in their homogeneous heat distribution. While the resulting heat must be dissipated over a single point, or a very small area, the lower temperatures resulting from low currents can be distributed and dissipated by multi-chip LEDs over a larger area. This results in a significant simplification of the thermal management.

The use of LEDs in conjunction with the reflection principle allows in contrast to the use of other, even conceivable bulbs a more compact design of the lighting device.

It is very useful if the light module is arranged in front of the reflector. As a result, a special depth effect in the appearance of the lighting device can be achieved both in the day and in the night design.

A further embodiment of the inventive concept also provides that the light module of the light function of a low beam and the reflector is associated with the light function of a high beam. The dipped beam is thus punctiform from the high beam, which also contributes to a distinctive appearance.

But it is also another, for example, reverse assignment conceivable.

It can be provided at least two reflectors, wherein the light module, a first Light function and the reflectors can each be assigned a further light function.

As a result, the functionality of the lighting device can be further increased. For example, the light module of the light function of a low beam, the first reflector, the light function of a high beam and the second reflector, the light function of an additional high beam, a cornering light, a highway light, a city light or the like be assigned. Also, the addition of additional reflectors with corresponding other lighting functions is conceivable. It is also conceivable that a plurality of reflectors is assigned a common light function.

The reflectors may be integrally connected to each other or may be present as separate components.

It has proved to be advantageous to arrange two reflectors next to or below each other and to hold the light module to at least one component which is arranged between the reflectors. As a result, a good "optical" separation between the light functions can be achieved.

It can be provided that the component is designed as a support for LEDs, the light beams directly in the main direction of light emission, ie headlamps in the direction of travel and rear lights against the direction of travel, radiating and a further light function can be assigned. This too can contribute to an increase in functionality. The light beams of the LEDs can for example be assigned to the light function of a daytime running light.

A further increase in functionality and also a variation of the appearance can be achieved by covering the illumination device with a lens on which at least one support for mounting LEDs is attached.

The LEDs held on the carrier can then be used, for example, to generate an (additional) daytime running light and / or to generate the light function of a direction indicator.

However, the invention also relates to a motor vehicle with at least one lighting device according to the invention, the illumination of which can be improved by a lighting device according to the invention.

Preferred embodiments of the invention are illustrated in the drawings and will be explained in more detail in the following description. The same reference numerals refer to the same, comparable or functionally identical components.

It show, each schematically

1 a motor vehicle from above with two lighting devices designed as headlamps according to the invention,

2 a representation according to view II 1 where only the left headlight is shown,

3 a sectional view according to section line III from 2 .

4 one of the 3 comparable view, but of another embodiment of the lighting device,

5 to 8th different variants of a medium or direct mounting of a light source through the lens,

9 a more detailed, exploded perspective view of the lighting device according to the invention. 1 to 3 .

10 a perspective view of the lens of the lighting device from behind,

11 a perspective sectional view of the lens according to section line XI 9 .

12 a subsection XII from the 9 , a holder for several bulbs, in exploded view,

13 a perspective view of an in 12 apparent, specially designed base plate, in an exploded view,

14 a perspective view of the upper part of the base plate according to view XIV 13 .

15 an extremely principled page presentation of the 12 apparent components to clarify the lighting technology operation,

16 the individual representation of a lens-connected, lamellar component for realizing a specific light function,

17 and 18 a sectional view of different embodiments according to section line XVII or XVIII in 16 and

19 an extremely principled representation of the lighting device according to the invention according to 9 , also to better illustrate the lighting function.

First, on the 1 to 3 Be referred.

Therein, a motor vehicle K can be seen, which with two lighting devices according to the invention 1 Is provided. The lighting devices 1 are designed as headlights.

It is in 2 a view from the front, with only the left headlight 1 is shown in more detail. In this illustration, it can be seen that the lighting devices 1 laterally adjoin a radiator grille, which grille slats 3 having. Below the radiator grille or the lighting device 1 is a bumper 2 intended.

How out 3 can be seen in particular, the lighting device 1 a housing 10 on which for receiving reflectors 100 . 101 (indicated by dashed lines), for receiving a light module comprising a lens 34 for the realization of the light function of a dipped beam and for the acquisition of several light emitting diodes (LEDs) 50 for the realization of the light function of a daytime running light is used.

The light module 34 is on a specially designed base plate 33 held, which in turn on the housing 10 is attached and also as a support for the LEDs 50 and more bulbs is used. The base plate 33 especially in the 13 and 14 described.

Furthermore, the housing 10 by means of a lens 20 covered, which with the housing 10 connected, for example, glued or welded. After fixing the lens 20 on the housing 10 can be the lens 20 Assign an outside A and an inside I.

It can be seen that with the lens 20 , below the base plate 33 , two elongated, lamellar or wing-like components 40 . 41 are connected. The lamellar components 40 and 41 serve as carriers of light emitting diodes (LEDs) 51 respectively. 52 ,

It can also be seen that the components 40 and 41 visually as a continuation to the grille fins 3 are arranged. The components 40 and 41 stand to the outside A of the lens 20 from.

In the lighting device 1 is the LEDs 50 the light function of a daytime running light, the LEDs 51 the light function of a direction indicator and the LEDs 52 also assigned the light function of a daytime running light.

In 4 is now another embodiment of a lighting device according to the invention 1' shown.

In this embodiment, a slightly differently designed lens 20 ' intended. With the lens 20 ' is in turn a component 42 connected, which as a support for LEDs 51 respectively. 52 serves. The LEDs 51 and 52 also serve to realize the light function of a direction indicator or a daytime running light.

In contrast to the embodiment according to 3 extends the component 42 inward to the inside I of the lighting device 1' ,

The attachment of the in the 3 and 4 shown components 40 . 41 and 42 can be done in a variety of ways. For example, a screw, a bond, a lock or the like is possible.

In 5 is shown that the component 40 with the lens 20 over a bolt 27 which is connected to the lens 20 is poured.

6 again shows an alternative mounting option in which the component 40 over a resting connection 28 with the lens 20 connected is.

7 describes yet another variant of a lens 20 ''' , which with a molded, lamellar carrier 200 for a LEDs 51 and a holder 205 having provided, prefabricated unit is provided. The carrier 200 and the lens 20 ''' So they are integrally connected. The carrier 205 with the LEDs 51 or the LEDs 51 associated printed circuit board is in a cavity 201 of the carrier 200 plugged in and held.

It can also be seen that about the carrier 200 a cover 202 applied, in particular via a latching connection 203 connected to this. The cover part 202 can opaque, so opaque formed and with a front opening 204 Be provided, so that by the LEDs 51 emitted light only through the opening 204 penetrates to the outside.

With unchanged lens 20 ''' can the cover 202 be designed differently, for example, in terms of the design of translucent or opaque areas, the design of the openings 204 , Etc.

In 8th is a variant of a lens 20 '' shown, with the lens 20 '' is designed such that it for the direct retention of LEDs 51 can serve. Specifically, the lens is pointing 20 '' contact surfaces 206 on, to which the LEDs 51 for example, can be glued.

Referring now to 9 becomes the lighting device according to the invention 1 in a unique position and shown in more detail.

The trained as a headlight lighting device 1 includes two identically constructed brackets 30 for illuminants, each of which is associated with a wide variety of different lighting functions (see also 12 . 13 . 15 and 19 ). The in the 9 right (outer) bracket 30 is slightly smaller than the left (inner) bracket 30 ,

The brackets 30 , in particular their base plates 33 , are with the case 10 about a recording 103 (see also 12 ) and in front of reflectors 100 . 101 and a surrounding sidewall 102 arranged. The housing 10 is by means of the lens 20 covered (see arrow), with the lens 20 a transparent (translucent) wall section 21 and an underlying opaque (opaque), especially black, wall portion 22 having. The black wall section 22 is with two slot-like openings 23 and 24 provided, which are arranged one above the other and for receiving the lamellar components 40 and 41 serve (see dashed line). As already mentioned, the components serve 40 and 41 as a carrier for a variety of LEDs 51 respectively. 52 , passing through the upper part 40 a direction indicator and through the underlying component 41 a daytime running light is realized.

The components 40 and 41 For example, from the inside I (see. 3 ) through the passage openings 23 and 24 inserted through and with the help of flanges (indicated by dashed lines in 17 ) with the lens 20 screwed or glued.

In the 10 and 11 is now the lens 20 shown in isolation. It is in particular from the 11 it can be seen that the transparent area or the wall section 21 the lens 20 and the black area or the wall section 22 via an approximately horizontally or in Lichtabstrahlrichtung herausladenden area or wall section 26 connected to each other. Above the transparent wall section 21 is again a black wall section 220 available.

Behind the transparent wall section 21 are the brackets 30 arranged. Furthermore, it can be clearly seen that the wall section 26 with semicircular recesses 25 is provided.

The recesses 25 are translucent and serve to receive the front part of the holder 30 or their base plate 33 which there with the LEDs 50 is provided for the realization of a daytime running light (see also 12 and 13 ).

Based on 12 should now be the holder 30 be described in more detail.

As already mentioned, the holder is 30 in front of the reflectors 100 . 101 and the side wall 102 arranged. The reflectors 100 and 101 are vertically stacked and by means of a recording 103 into which the rear part of the base plate 33 is inserted (see dashed line), separated from each other.

The holder 30 serves to hold various bulbs to produce different light functions, as based on the 13 and 15 such as 19 will be described in more detail.

On the one hand serves the holder 30 for holding the light module 34 , The light module 34 , which can also be called a projection module, has a lens (projection lens) 340 , a collimator arranged behind it 341 and one behind the collimator 341 arranged heat sink 342 on. Furthermore, in the light module 34 also LEDs for generating light beams for the light module 34 recorded (not visible). In the embodiment, the light module 34 each associated with the light function of a low beam. The behind the bracket 30 arranged reflectors 100 respectively. 101 in each case the light function of a high beam or a so-called additional high beam is assigned (see also 15 and 19 ).

The light module 34 is between two, a cap-like cover 31 supporting columns 32 positioned, which with the already mentioned base plate 33 are connected.

In the front area of the base plate 33 is a light guide 336 provided, which in front of the LEDs 50 is arranged.

In 13 should now the base plate 33 the holder 30 be described in detail.

The base plate 33 consists of a shell 320 and a lower part 330 , The top 320 is flat and consists (as well as the lower part 330 ) Of a good heat conducting material, such as aluminum.

The top 320 settles in a front part 321 and a back part 322 divide, with the front part 321 in terms of the surface extension of the base plate 33 opposite the back part 322 is narrower and makes up only about one third of its width. The front part 321 and the back part 322 go in one piece with each other and are with a ribbed surface 323 versehe. Through the ribbed surface 323 On the one hand, the heat-radiating surface is effectively enlarged, on the other hand it creates an appealing design.

In the area of the front part 321 is a slot 324 intended.

In 14 becomes the shell 320 the base plate 33 shown from the bottom. It can be seen that it is in the area of the rear part 322 a support surface 326 having. With the support surface 326 can the shell 320 on a support surface 333 of the lower part 330 the base plate 33 be placed and fastened with this.

Furthermore, at the bottom of the shell 320 rectangular recesses 325 it can be seen in each case an LED chip 60 is attached adjustable.

One of the LED chips 60 is positioned so that it is the reflector 100 irradiated with light rays, the other LED chip 60 On the other hand, it is oriented so that it is the reflector 101 subjected to light rays (see also 15 ).

It is alternatively or additionally conceivable, the reflectors 100 . 101 opposite the base plate 33 adjustable / pivotable form (not shown), so that they can be aligned as needed.

The LED chips 60 can be switched either individually or together or activated to produce a desired light distribution of a high beam.

Also the lower part 330 is in a front part 331 and in a back part 332 divisible. Here are the width extensions of the parts 331 and 332 to the width extensions of the parts 321 and 322 customized.

In contrast to the rear part 322 of the top 320 is the back part 332 of the lower part 330 not fully formed, but expands (starting from the front part 331 ) bifurcated to the rear to two ends, between which a clear space is created.

In the front part 331 is also a recess starting from the front 334 introduced, which with three brackets 335 for LEDs 50 is provided. The recess 334 comes with the already mentioned light guide 336 covered.

Following the front recess 334 is in the longitudinal direction of the lower part 330 a groove 337 intended. This groove 337 serves for displaceable or adjustable fastening a carriage 70 , which in turn for fixing the lens 340 from the light module 34 serves. In this case, the carriage 70 through the slot 324 of the top 320 protrude, with the slot 324 sufficient space for Längsverschieblichkeit the carriage 70 leaves. The by the sledge 70 and the groove 337 formed guide can be designed as a so-called dovetail guide.

By the thus realized adjustability of the lens 340 can their distance from the collimator 341 be easily adjusted.

The sled 70 also serves as a holder for an electrical system and as a cable distributor (not shown).

In 15 is again in principle from the holder 30 , the light module held thereon 34 and the reflectors 100 and 101 formed arrangement shown.

By the arrangement, in particular by the design of the base plate 33 the holder 30 can be a very compact design of the lighting device according to the invention 1 despite a large number of realized lighting functions are made possible.

It is indicated in principle that at the base plate 33 attached LED chips 60 Light rays L1 on the upper reflector 100 or light beams L2 on the lower reflector 101 toss. The light beams L1 and L2 are reflected by the reflectors 100 and 101 reflected forward in the direction of travel.

Furthermore, by the on the base plate 33 fastened and thus in front of the reflectors 100 . 101 arranged light module 34 Light beams generated L3 and also thrown forward in the direction of travel.

Finally, by the front of the base plate 33 attached LEDs 50 also light rays L4 thrown forward in the direction of travel.

By optional activation of the base plate 33 arranged light sources, which can be activated together but also in any combination, a desired overall light distribution L can be produced flexibly.

Additionally or alternatively, those with the lens 20 about the components 40 and 41 connected bulbs 51 and 52 activatable (cf. 9 ).

In 19 is extremely principle again on the arrangement of the reflectors 100 and 101 as well as the holder 30 together with the light module 34 the lighting device 1 received, with the two similar, made of reflectors 100 . 101 and mounts 30 existing units of a lighting device 1 are indicated.

It can be seen that within the lighting device 1 two of reflectors 100 . 101 and mounts 30 existing units are arranged side by side. So are two reflectors 100 in a row next to each other and two reflectors 101 arranged side by side in an underlying row. Here is the overhead reflectors 100 one main beam function LF1 and the underlying reflectors 101 each associated with an additional high-beam function LF1 '.

The additional high-beam function LF1 'can either complement the high-beam function LF1, for example, bring about even wider illumination of the road, or even replace this. This depends on the driving of the LED chips 60 from. Instead of the additional high-beam function LF1 ', however, others are the reflectors 101 assignable light functions, such. As fog light, cornering light, city lights or the like conceivable.

In the view shown is in each unit in the vertical direction between the reflectors 100 and 101 each holder 30 provided, which carries in a highly compact manner, the lighting means for the realization of the high beam function LF1, the additional high beam function LF1 ', a low beam function LF2 and at least part of a daytime running light function LF3. Thus, in the vertical direction, the light functions high beam LF1 and additional high beam LF1 'optically "separated" by the low beam LF2.

Another part of the daytime running light function LF3 is, as already mentioned, through the LEDs 52 in the lens 20 integrated component 41 realized.

In particular from the 15 and 19 it becomes clear that in the lighting device 1 the light functions or light beams of different types of optical elements are "networked" with each other. In particular, the reflection principle (reflectors 100 . 101 ) with the projection principle (projection module or light module 34 ) combined or superimposed.

So can those of the reflectors 100 respectively. 101 indirectly emitted light beams L1 and L2 through the directly from the projection or light module 34 radiated light beams L3 are superimposed.

In the 15 illustrated reflectors 100 . 101 a unit can also be arranged offset to one another. For example, it is conceivable that the reflector associated with the additional high beam LF1 ' 101 opposite the reflector 100 in the light emission direction forward, that can be offset in the figure to the left.

Notwithstanding the embodiment, it is also conceivable reflectors 100 . 101 and the light module 34 To associate a unit with only one light function, for example, the lower unit the dipped beam LF2 and the inner unit the high beam LF1, LF1 '.

Finally, based on the 16 to 18 on the structure of the component 40 which is that of the component 41 in principle, is similar, to be discussed in more detail.

That's how it turns out 16 the lamellar or wing-like structure of the component 40 especially good.

In the outer edge area of the component 40 are a variety of light-emitting diodes (LEDs) 51 arranged.

In this case, the component 40 a cavity 400 on which for receiving a holder 402 for the LEDs 51 serves. On the holder 402 is again a cover 403 made of Plexiglas. The cover 403 has a tapered end portion through one in the component 40 introduced slot-like opening 401 ,

Because of the component 40 the light function of a direction indicator is to be realized, the LEDs 51 be formed yellow. However, it is also possible the cover 403 to color accordingly.

As already mentioned, the component becomes 40 through the slot-like passage opening 24 the lens 20 (see 9 ) from the back of the lens 20 pushed through and indicated by dashed lines flanges 406 attached to the back.

Alternatively, a component 40 ' conceivable, which instead of a front, slot-like opening only a corresponding geometrically designed, translucent area 405 which up and down through opaque (opaque) areas 404 is limited.

As a result, a somewhat different embodiment could also be used 402 ' for a holder of the LEDs 51 (without an additional cover 403 ), wherein the holder 402 ' again in a recess 400 of the component 40 ' introduced and held.

The LEDs 51 can on the holder 402 be attached as individual LED boards or in the form of so-called flexboards (multiple LEDs on a flexible band).

LIST OF REFERENCE NUMBERS

1, 1 '

lighting device

2

bumper

3

Radiator grille louvres

10

casing

20, 20 ', 20' ', 20' ''

Lens

21

transparent wall section of the lens

22

black, opaque wall portion of the lens

23

slit-like passage opening

24

slit-like passage opening

25

semi-circular recess

26

horizontally extruding wall section of the lens

 27

Screw bolt locking connection

30

Bracket with base plate for bulbs

31

cover

32

Support

33

baseplate

34

light module

40, 40 '

lamellar carrier for bulbs

41

lamellar carrier for bulbs

42

Carrier for bulbs

50

LEDs for realizing the light function of a daytime running light

51

LEDs for realizing the light function of a direction indicator

52

LEDs for generating the light function of a daytime running light

60

LED chips for high beam

70

carriage

100

Reflector for high beam

101

Reflector for additional high beam

102

Side wall

103

Holder for bracket

200

molded laminar beams for light bulbs

201

cavity

202

cover

203

locking connection

204

opening

205

Holder for LEDs

206

contact surface

220

black, opaque wall section

320

Upper part of the base plate

321

front part of the shell

322

back part of the shell

323

grooved surface

324

Long hole

325

recesses

326

Bearing surface of the upper part

330

Lower part of the base plate

331

front part of the lower part

332

rear part of the lower part

333

Support surface of the lower part

334

front recess

335

Brackets for LEDs

336

optical fiber

337

dovetailed groove

340

lens

341

collimator

342

heatsink

400

cavity

401

slit-like opening

402, 402

Holder for LEDs

403

Cover (Plexiglas)

404

opaque area

405

translucent area

406

flange

A

outside

I

inside

K

motor vehicle

L1-L4

light rays

L

Total light distribution

LF1

High beam function

LF1 '

Additional high beam function

LF2

Low beam function

LF3

Daytime running lights function

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007008403 A1 [0002]

Claims (9)

Lighting device ( 1 . 1' ), in particular headlights, for a motor vehicle (K) for generating one or more specific light functions (LF1, LF1 ', LF2, LF3) with at least two light sources ( 34 . 50 . 60 ), by the at least one light function (LF1, LF1 ', LF2, LF3) assignable or associated light beams (L1, L2, L3, L4) are generated or generated, wherein the producible or generated light beams (L1, L2) at least one of the bulb ( 60 ) via at least one reflector ( 100 . 101 ) are deflected or deflectable and with the producible or generated light beams (L3, L4) of at least one other light source ( 34 ) to a total light distribution ( 1 ) can be supplemented or supplemented, characterized in that at least one of the lighting means ( 34 ) as a one lens ( 340 ) having light module ( 34 ) is trained. Lighting device ( 1 . 1' ) according to claim 1, characterized in that the over the reflector ( 100 . 101 ) in light main emission direction deflected or deflectable light beams (L1, L2) by at least one light emitting diode ( 60 ) be generated. Lighting device ( 1 . 1' ) according to claim 1 or 2, characterized in that the light module ( 34 ) in front of the reflector ( 100 . 101 ) is arranged. Lighting device ( 1 . 1' ) according to one of the preceding claims, characterized in that the light module ( 34 ) the light function of a dipped beam (LF2) and the reflector ( 100 . 101 ) is assigned the light function of a high beam (LF1). Lighting device ( 1 . 1' ) according to one of the preceding claims, characterized in that at least two reflectors ( 100 . 101 ) are provided, wherein the light module ( 34 ) a first light function (LF2) and the reflectors ( 100 . 101 ) is assigned in each case a further light function (LF1 or LF1 '). Lighting device ( 1 . 1' ) according to one of the preceding claims, characterized in that two reflectors ( 100 . 101 ) are arranged next to or below each other and the light module ( 34 ) on at least one component ( 30 respectively. 33 ) held between the reflectors ( 100 . 101 ) is arranged. Lighting device ( 1 . 1' ) according to one of the preceding claims, characterized in that the component ( 33 ) as a carrier for light-emitting diodes ( 50 ) is formed, the light beams (L4) can be emitted or radiated in the main light emission direction and a further light function (LF3) can be assigned or assigned. Lighting device ( 1 . 1' ) according to one of the preceding claims, characterized in that the lighting device ( 1 . 1' ) with a lens ( 20 . 20 ' . 20 '' . 20 ''' ) is covered, at least one carrier ( 40 . 41 . 42 ) for holding bulbs ( 51 . 52 ) is attached. Motor vehicle (K) with at least one lighting device ( 1 . 1' ) according to any one of the preceding claims.

Images