CZ309956B6 - Headlamp for motor vehicles - Google Patents

Abstract

The headlamp for motor vehicles, to perform the function of driving and passing beam, includes at least one reflector assembly (4) containing a light source (7), first reflector (5) to reflect light beams (10) from the light source (7) and the second reflector (6) for the impact of light beams reflected from the first reflector (5) and their subsequent reflection outwards from the headlamp. The headlamp contains a separate optical system (11) of the driving beam and a separate optical system (12) of the passing beam containing at least one reflector assembly (4) and at least one separate reflector unit (13) adapted to create respective partial light images (12a, 12b) of the passing beam. Their combination creates the full light image of the passing beam. The reflector unit (13) contains a proper light source (7) and the third reflector (13a) to reflect the light beams (10) from this light source (7) outwards from the headlamp. The optical system (11) of the driving beam contains at least one reflector assembly (4) or at least one reflector unit (13), which are adapted to create the light image (11a) of the driving beam.

Description

Headlight for motor vehicles

Field of technology

The invention falls within the area of the construction of lighting devices of motor vehicles and the weight of a headlight equipped with a set of reflectors to ensure the required light trail.

Stay up to date on techniques

A headlight, especially for motor vehicles, contains several lighting units, where each of these lighting units provides a different lighting function or contributes to ensuring the required light trail characteristics. The individual lighting units are usually stored in a shaped support case of the lamp, since each unit contains at least one light source and other optical elements. The light source emits light rays, and the optical elements are a system of refracting and reflecting surfaces and interfaces of optical media that influence the direction of the light rays when creating the output light trail.

From the documents US 6966675 B2, US 20070236951 A1 and EP 1528313 A2, front headlights are known, the optical system of which includes an assembly of reflectors, when the light is sent to the primary elliptical reflector directly from the light source and the light is sent to the secondary parabolic reflector indirectly from the primary iho reflectors . In this way, it is possible to direct the light rays generated by the light source first in one direction and then in another direction. In documents US 6966675 B2 and EP 1528313 A2, an aperture is arranged in the direction of the rays, creating a photo-shaped light image on the image surface. In the embodiment described in the document US 20070236951 A1, there is an aperture, which creates the desired shape of the light image on the image surface of the component of the primary elliptical reflector. The disadvantage of all of the above-mentioned designs is the fact that contemporary headlights are required to produce light beams with the greatest possible light efficiency. All of the above-mentioned styles are not adapted to effectively ensure various lighting functions, when a certain loss of captured light occurs through the lens of the aperture, as the light captured by one or more light sources is captured by the aperture and not used further.

The aim of the invention is to design a headlight for motor vehicles, comprising an elliptic-parabolic assembly of primary, elliptically shaped, reflectors for directing light rays into secondary, parabolically shaped reflectors with maximum use of the light provided by the light sources, when through the elliptical-parabolic assembly of reflectors, placement is ensured different lights function without the need to use apertures located in the direction of the emitted light rays.

The essence of the invention

The above-mentioned object of the invention is fulfilled by a headlight for a motor vehicle according to the invention, to fulfill the function of main beam and dipped beam, covering a carrier case with a transparent cover, which defines the inside of the case with an inner chamber, in which at least one reflector assembly containing a light medium, the first reflector for reflection is placed of light rays from the lighting medium and a second reflector for the impact of light rays reflected from the first reflector and their subsequent reflection outward from the headlight. A separate high beam optical system and a separate dipped beam optical system are located in the inner compartment, where the dipped beam optical system contains at least one reflector assembly and at least one separate reflector unit, which are adapted to create the appropriate partial light images of the dipped beam, the combination of which results in a total the light image of the dipped beam. The reflector unit contains its own light source and a tfti reflector

- 1 CZ 309956 B6 to reflect light rays from this light source towards the outside of the headlight, and said main beam optical system contains at least one reflector assembly or at least one reflector unit, which are designed to create a light image of the main beam.

The main beam optical system and/or the dipped beam optical system are preferably made without the use of an aperture designed to deflect the light rays and create a light/dark interface.

The first reflector advantageously has an elliptical shape.

The second and fourth reflectors have an advantageous parabolic shape.

According to one of the preferred embodiments, the high beam optical system and/or the dipped beam optical system contains at least two reflector assemblies, while in at least one of these reflector assemblies the second reflector includes at least one parabolic segment.

According to one of the preferred embodiments, the high beam optical system and/or the dipped beam optical system contains at least two reflector units, at least one of which contains a three-point reflector covering at least one parabolic segment.

According to one of the preferred embodiments, each of the lighting means includes only one light source.

Clarified drawing

The invention will be further explained by means of its examples with reference to the attached drawings, in which it shows:

Fig. 1 is a front view of the first example of the embodiment of the headlight according to the invention, for the purposes of image transparency with the transparent cover and cover mask removed;

fig. 2 longitudinal fez A-A' from fig. 1;

Fig. 3 light image of the main beam created by the optical system of the main beam of the headlight according to the first embodiment;

fig. 4 longitudinal fez B-B' from fig. 1;

Fig. 5 split light image of the dipped beam in the image area created by the reflector assembly of the optical system of the dipped beam headlight according to the first embodiment;

Fig. 6 longitudinal fez C-C' from Fig. 1;

Fig. 7 split light image of the dipped beam in the image plane created by the reflector unit of the optical system of the dipped beam headlight according to the first embodiment;

Fig. 8 is a front view of the second example of the embodiment of the spotlight according to the invention, for the purposes of image transparency with the transparent cover and cover mask removed;

Fig. 9 is a front view of the third example of the embodiment of the headlight according to the invention, for the purposes of image transparency with the transparent cover and cover mask removed.

-2CZ 309956 B6

Examples of the implementation of the invention

Giant. 1 shows a front view of the first embodiment of the headlight, with the translucent cover 2 and cover mask 8 removed (translucent cover 2 and cover mask 8 are shown, for example, in Fig. 2) for motor vehicles according to the invention. The headlight contains a support case 1 covered here by a non-removable translucent cover 2, which defines the inner chamber 3. Two reflector assemblies 4 and one reflector unit 13 are located in the inner chamber 3.

In general, each reflector assembly 4 contains a light source 7, a first reflector 5 for reflecting light rays 10 from the light source 7 and a second reflector 6 for the impact of light rays 10 reflected from the first reflector 5 and their subsequent reflection outward from the headlight. In general, each reflector unit 13 contains its own lighting means 7 at the reflector 13a to reflect the light rays 10 from this lighting means 7 towards the outside of the headlight.

Giant. 2 shows phase A-A' from Fig. 1 leading to the first of the two reflector assemblies 4 occupied in the headlight according to the first embodiment. This reflector assembly 4 includes a separate lighting means 7, the first reflector 5 of an elliptical shape and the second reflector 6 of a parabolic shape, and forms the optical system 11 of the main beam.

Giant. 4 shows the second of the reflector assemblies 4 of the headlight according to the first embodiment, which includes a separate light means 7, a first reflector 5 of an elliptical shape and a second reflector 6 of a parabolic shape. This reflector assembly 4 is connected to the reflector unit 13, shown in Fig. 1 and 6, part of the optical system 12 of the dipped beam.

Giant. 6 shows the reflector unit 13 occupied in the headlight according to its first embodiment, which includes a three-dimensional reflector 13a of parabolic shape and a separate light means 7 that is part of the optical system 12 of the dipped beam.

Giant. 2 shows that the lighting means 7 is equipped with a carrier 71 for fixing a light source 72 or light sources 72 emitting light rays 10. The first reflector 5 contains two foci 51, 52. One or more is situated in the first elliptical focus 51 or in its close vicinity of the light sources 72 of the lighting means 7 and in the long elliptical focal point 52 there is a parabolic focus 61 of the long reflector 6. In the inner chamber 3 there is also a cover mask 8, the purpose of which is to cover the first reflector when looking into the inner chamber 3 through the translucent cover 2 5 and the lower part of the long reflector 6. The cover mask therefore fulfills an aesthetic function and its use is possible, but not necessary for the invention.

The reflector assembly 4 shown in Fig. 2, which is a part of the optical system 11 of the high beam, is adapted to direct the light rays 10 for the resulting light image of the high beam shown in Fig. 3. The light image of the high beam represents the distribution of the light characteristics for the high beam function, when light can be transmitted above the horizontal level H.

Giant. 4 shows phase B-B' from Fig. 1, which is guided by the second of the two reflector assemblies 4 occupied in the headlight according to the first embodiment of the invention. Here too, similarly to the first of the reflector assemblies 4, the lighting means 7 is equipped with a carrier 71 for fixing the light source 72 or light sources 72 emitting light rays 10. The first elliptical reflector 5 contains two foci 51, 52. In the first elliptical focus 51 or one or more light sources 72 of the lighting device 7 are located in its close vicinity, and in the second elliptical focal point 52, a parabolic focal point 61 of a long reflector 6 is located. In the inner chamber 3 there is also a cover mask 8, around which it is so that when looking into the inner chamber 3 pfes translucent cover 2 covered the first reflector 5 and the lower part of the long reflector 6. The cover mask therefore fulfills an aesthetic function and its use is possible, but not necessary for the invention. Reflectors displayed

-3 CZ 309956 B6 the assembly 4 is adapted to direct the light rays 10 to create a diffused light image 12a of dimmed light shown in Fig. 5. visible traces cannot be sent above the horizontal level H, and together with the divided light image 12b of the dimmed light created by the reflector unit 13, it makes up the overall light image of the passing light.

Giant. 6 shows that the light source 7 of the reflector unit 13 is equipped with a carrier 71 for fixing the light source 72 or the light source 72 emitting light rays 10. The light source 72 is located in the parabolic focus 61 of this reflector 6, or, if several light sources 72 are used .the light sources 72 are located near the parabolic focus 61. The diffuse light image 12b of the passing light created by the reflector unit 13 is captured in Fig. 7. The diffuse light image 12b represents the distribution of a certain part of the light characteristic of the dimmed light, when the light in a certain part of the light trace can be t sent above the horizontal level H, but only in the shape of a wedge with a clear difference between light and dark.

Fig. 8 shows a second example of the embodiment of a headlight for a motor vehicle according to the invention. The optical system 11 of the main beam contains two reflector assemblies 4, which participate in the creation of the overall light image of the main beam function, which is similar to the light image lia from Fig. 3. Each of these two reflector assemblies 4 contains the first reflector 5 of an elliptical shape, the second reflectors 6 of a parabolic shape and a separate light means 7. At least one of these second reflectors 6 is formed by a system of parabolic segments 62. The optical system 12 of the dipped beam includes two reflector assemblies 4 and two reflector units 13, which together contribute to the creation of the overall light image of the dimmed light function. In both reflector assemblies 4, the first reflectors 5 are elliptical in shape and the second reflectors 6 are parabolic in shape, while at least one of the second reflectors 6 is formed by a set of parabolic segments 62. The reflector 13 and each of the two reflector units 13 are parabolic in shape. At least one of these reflectors 6 is formed by a set of parabolic segments 62. By combining the light images formed by the two reflector assemblies 4 and two reflector units 13, which are common components of the dipped beam optical system 12, the resulting dipped/dimmed light trail is created to meet the background light characteristics dimmed lighting functions of the headlight, since it is not necessary to place an aperture in the direction of the light rays to create a light/dark interface.

Fig. 9 shows an example of the embodiment of a headlight for a motor vehicle according to the invention. In this embodiment, the composition of the optical system 12 of the dipped beam is similar to that of the embodiment in Fig. 8. The optical system 11 of the main beam includes two reflector units 13, each of which contains one tefti reflector 13a and a light source 7. Both tfte reflectors are parabolic in shape and at least one of them is formed by a system of parabolic segments 62. The high-beam optical system 11 is adapted to create a light image similar to the light image shown in Fig. 3.

An important advantage of the design according to this invention is that this design allows the lamp to be hung without the need to use an aperture designed to deflect the light rays and create a light/dark interface. In other words, with the invention there is no loss of light rays, which occurs with the fashion known from the state of the art, which must use an aperture. This leads to an increase in the luminous efficiency of the design according to the invention in comparison with the designs of the state of the art.

Through the switching of certain light sources 7, light rays 10 are emitted, when by the following reflection of the emitted light rays 10 on the reflectors 5, 6, the required light characteristics for high beam or dimmed light are set on the display area VH.

-4CZ 309956 B6

The present invention is not limited to the examples of its implementation described above, but also includes all modifications and adjustments that fall within the scope defined by the appended patent claims.

Claims (6)

1. Headlamp for motor vehicles, to fulfill the function of main beam and low beam, obscuring carrier case (1), transparent cover (2) obscuring carrier case (1) and inner case (1) at least two reflector assemblies (4) and reflector units ( 13), where each reflector assembly (4) includes its own lighting means (7), the first reflector (5) for the reflection of light rays (10) from the lighting means (7) and the second reflector (6) for the impact of light rays reflected from the first reflector (5) and their subsequent reflection outwards from the headlight, and each reflector unit (13) includes its own lighting means (7) to attach the reflector (13a) to the reflection of light rays (10) from this lighting means (7) outwards from headlight, characterized by the fact that a separate optical system (11) of the main beam and a separate optical system (12) of the dipped beam are located in the inner compartment (3), where the optical system (12) of the dipped beam includes at least one reflector assembly (4) and at least one reflector unit (13), and the optical system (11) of the main beam includes at least one reflector assembly (4) or at least one reflector unit (13), which are configured to create a light image (lia) of the main beam. 2. Headlight according to claim 1, characterized in that the first reflector (5) has an elliptical shape. 3. A headlight according to any of the preceding claims, characterized in that the second reflector (6) and third reflector (13a) have a parabolic shape. 4. A headlight according to any of the preceding claims, characterized in that the optical system (11) of the main beam and/or the optical system (12) of the dipped beam includes two reflector assemblies (4), preferably in at least one of these reflector assemblies (4) includes a dry reflector (6) at least one parabolic segment (62). 5. A headlight according to any one of the preceding claims, characterized in that the optical system (11) of the main beam and/or the optical system (12) of the dipped beam contains at least two reflector units (13), of which at least one contains the fourth reflector (13a) covering at least one parabolic segment (62). 6. A lamp according to any of the preceding claims, characterized in that each of the light means (7) includes only one light source (72).