Lighting for motor vehicles

Abstract

The invention relates to a lighting lamp for a motor vehicle. The lighting lamp (1) comprises a housing (2) which is provided with a light-transmissive cover panel (14) for light emission from the lighting lamp (1), and in which a first light-emitting device (3, 4, 5, 6) and a second light-emitting device (7) are arranged. The first light-emitting device (3, 4, 5, 6) is provided for generating at least a part of the low beam and / or the high beam of the lighting lamp (1), and the second light-emitting device (7) is provided for generating at least a part of the cornering light and / or the daytime running light of the lighting lamp (1). The lighting lamp according to the invention comprises a baffle (11) which is light-impermeable in a predetermined baffle section (11a) except for a plurality of light emission points (12) arranged in the baffle section, wherein the light radiation by the second light-emitting device (8) towards the cover panel (14) takes place through the predetermined baffle section (11a) in order to generate the at least a part of the cornering light and / or the daytime running light.

Description

Technical Field

[0001] This invention relates to a lighting lamp for a motor vehicle and a corresponding motor vehicle. Background Technology

[0002] As is known from existing technology, motor vehicle lights also perform other lighting functions besides low beams and high beams, such as demarcation marking lights and daytime running lights. A common problem here is that while these lighting functions should be perceived by other road users, their attention should not be excessively drawn to them. Summary of the Invention

[0003] The objective of this invention is to realize the light function of outline marking lights or daytime running lights in a new way in motor vehicle lighting.

[0004] The lighting fixture according to the invention is provided for use in motor vehicles, preferably passenger cars, but also for trucks when necessary. The lighting fixture is preferably a headlight. If the interaction between the lighting fixture and the motor vehicle, or more precisely, components of the motor vehicle, is described herein and hereinafter, it should always be understood that this interaction occurs when the lighting fixture is installed in the motor vehicle. The components of the lighting fixture that have corresponding interactions with the motor vehicle, or more precisely, its components, are therefore designed such that such interactions occur when the lighting fixture is installed in the motor vehicle.

[0005] The lighting fixture according to the invention includes a housing having a light-transmitting cover for emitting light from the lighting fixture, and a first light-emitting device and a second light-emitting device arranged within the housing. Therefore, the cover is a light-transmitting plate through which light generated in the lighting fixture is emitted from the lighting fixture. Here and below, "light-transmitting" should be understood as partial light transmittance (semi-transparency) and, if necessary, substantially 100% light transmittance (transparency). In a preferred variation, the cover has a transmittance of 90% or higher.

[0006] A first light-emitting device is used to generate at least a portion of the low beam of the headlights and / or at least a portion of the high beam of the headlights, while a second light-emitting device is configured to generate at least a portion of the outline marker lights of the headlights and / or at least a portion of the daytime running lights of the headlights. Therefore, the second light-emitting device can contribute to the light function of the daytime running lights or the outline marker lights and, if necessary, also contribute to both light functions. The outline marker lights are configured to indicate the position of the vehicle and are also referred to hereinafter as position lights. Daytime running lights are a light function that is activated in terms of brightness when the vehicle is in motion, that is, when the low beam and high beam are turned off.

[0007] The lighting fixture according to the invention includes a baffle, preferably made of plastic, such as polycarbonate or PMMA (PMMA = polymethyl methacrylate). The baffle is opaque (i.e., its transmittance is essentially 0%) in a predetermined baffle section except for a plurality of light-emitting points disposed therein. Light radiation from the second light-emitting device toward the cover plate is achieved through the predetermined baffle section (i.e., the light-emitting points disposed therein), thereby producing at least a portion of the contour marking lights and / or the daytime running lights.

[0008] In this context and hereinafter, light can be understood as electromagnetic radiation in the spectrum visible to the human eye. Furthermore, the term "light emanating point" can be understood to refer to a light emanating surface that appears as a point to the human eye when observing the baffle. Preferably, for each light emanating point, its maximum extension dimension in its top view is 4 mm or less. The maximum extension dimension of each light emanating point is particularly between 0.1 mm and 4 mm, and especially preferably between 0.5 mm and 3 mm. The individual light emanating points can have different shapes depending on the design. For example, the light emanating points may have a circular shape.

[0009] The advantage of the lighting according to the invention is that it provides a well-perceived light function in the form of contour marking lights or daytime running lights by means of light emitting points in a light-blocking area of ​​the baffle except for the light emitting point, while the attention of other road users is not strongly focused on the light.

[0010] In another particularly preferred embodiment, the total area of ​​all light emission points in the preset baffle section accounts for 10% or less of the area of ​​the preset baffle section, preferably 2% or less, and particularly preferably 1% or less.

[0011] In another design, light emanating points of multiple different sizes are arranged within the pre-defined baffle section. Alternatively or additionally, the light emanating points can also be arranged in an irregular pattern within the pre-defined baffle section. These variations generate a very attractive light distribution that evokes a connection to the starry sky at the observer's perspective.

[0012] In another variation of the lighting fixture according to the invention, the baffle is a body made of a light-transmitting material, i.e., a translucent or transparent material. In a preferred variation, the material of the body is selected such that it has a transmittance of 90% or higher. The body made of this material has an opaque coating in a predetermined baffle section, which is removed at the location of the light emission point. Preferably, the coating at these locations is removed by laser, that is, it is removed by laser processing. Using this variation of the invention, the corresponding light emission points in the predetermined baffle section can be created in a simple manner.

[0013] In a preferred variation of the embodiment just described, the main body of the baffle is made of plastic, such as polycarbonate or PMMA. Alternatively or additionally, the opaque coating can be a PVD (Physical Vapor Deposition) coating. Such coatings are known in themselves and are applied by physical vapor deposition, such as sputtering. Alternatively or additionally, the opaque coating can also be, for example, a reflective metallic coating made of chromium or an aluminum vapor deposition layer. It is also conceivable to provide a painted or plastic coating. This achieves an attractive design for the baffle. In another design, the baffle extends around the first light-emitting device, thereby achieving compact integration of the baffle into the lighting fixture.

[0014] If necessary, the baffle may also include a light-transmitting body and additional components, wherein the additional components are arranged in front of the body and include the preset baffle section.

[0015] In another particularly preferred embodiment, the light-emitting device includes a light-conducting section having light radiation toward the cover plate, preferably planar light radiation. Preferably, the light-conducting section at least partially surrounds the first light-emitting device in a top view of the cover plate. Using this light-conducting section ensures a compact structure for the lighting fixture. As an alternative to the light conductor, a direct-radiating light-emitting device can also be used, wherein the light source (e.g., an LED) radiates through additional optics.

[0016] In another preferred variant, the lighting fixture additionally includes a third light-emitting device for generating at least a portion of the outline marking lights and / or at least a portion of the daytime running lights. In other words, a third light-emitting device may be used in addition to the second light-emitting device to generate the outline marking lights or daytime running lights. This third light-emitting device preferably also includes a light-conducting section having light radiation toward the cover plate, preferably planar light radiation.

[0017] In a preferred design, the third light-emitting device is arranged behind a semi-transparent or transparent section of the baffle. In other words, light radiation from the third light-emitting device toward the cover plate is achieved through this semi-transparent or transparent baffle section. Alternatively or additionally, the third light-emitting device may be arranged above the first light-emitting device. If necessary, the second and third light-emitting devices may also have a common light inlet. In particular, the second and third light-emitting devices may also be different sections of a single light conductor, which preferably surrounds the first light-emitting device.

[0018] In another design, the lighting according to the invention further includes a fourth light-emitting device for indicating driving direction (i.e., a flasher). This fourth light-emitting device preferably includes a light-conducting section having light radiation directed toward the cover plate, and preferably planar light radiation.

[0019] In a preferred variation, the fourth light-emitting device is arranged behind a translucent or transparent section of the baffle. In other words, light radiation from the fourth light-emitting device toward the cover plate is achieved through this translucent or transparent baffle section. The flash is therefore well visible. Alternatively or additionally, the fourth light-emitting device may be positioned below the first light-emitting device, wherein, in this case, the fourth light-emitting device is preferably arranged above the second light-emitting device.

[0020] In addition to the aforementioned lighting fixtures, the present invention also relates to a motor vehicle that includes one or more lighting fixtures according to the present invention or one or more preferred variations thereof. Attached Figure Description

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] In the attached diagram:

[0023] Figure 1 A front top view of an embodiment of a lighting lamp according to the invention is shown, wherein no baffles or covers are installed.

[0024] Figure 2 Showing something similar Figure 1 A top view showing the installed baffle; and

[0025] Figure 3 Show reproduction Figure 1 and Figure 2 An exploded view of some components of the lighting fixture. Detailed Implementation

[0026] Embodiments of the present invention will now be described with reference to the right headlight. This headlight... Figure 1 and Figure 2 It is shown in a top view from the front (that is, in the direction of the line of sight to its light-emitting surface) and is indicated by reference numeral 1. Figure 1 and Figure 2 In the middle, the upward direction corresponds to the vertical direction, or height direction, of the motor vehicle (not shown), if the headlight is installed in the motor vehicle. In a manner known per se, the headlight includes a housing 2 installed in the motor vehicle, which is covered from the front by a light-transmitting cover. The cover from... Figure 1 and Figure 2 It is not visible in the middle. However, the cover plate is... Figure 3The exploded diagram is shown therein and is indicated by reference numeral 14.

[0027] The lamp housing contains known optical devices for generating low and high beams. Specifically, two projection optics 3 and 5 are provided for generating low beams, and a projection optics 4 and a reflective optics 6 are provided to generate the high beam. These optics belong to an embodiment of the first light-emitting device. Optics 3, 4, and 5 use LEDs as the light source, while the reflective optics 6 uses a laser diode.

[0028] The optical conductors, including optical conductor segments 7 and 8, extend around optical devices 3, 4, 5, and 6. Figure 1 In the top view, the light conductor segment 7 first extends downward from the right corner of the lamp and then extends along the width of the lamp below optics 3, 4, 5, and 6 until it extends upward again from the lower left region of the lamp to its upper left corner. Light conductor segment 7 represents an embodiment of the second light-emitting device. Unlike light conductor segment 7, light conductor segment 8 extends only horizontally above optics 3 to 6, that is, from the right corner to the left corner of the lamp. Light conductor segment 8 represents an embodiment of the third light-emitting device.

[0029] In the vertical direction, an additional light conductor section 9 is provided between the optical devices 3 and 4 and the light conductor section 7. This additional light conductor section belongs to the embodiment of the fourth light-emitting device. The light conductor sections 7, 8, and 9 are mounted in a retaining frame 10 positioned within the housing 1.

[0030] This can be seen from Figure 3 This can be seen in the exploded view. There, the retaining frame 10 and the light conductor segments 7 and 8 are reproduced in perspective. Furthermore, from... Figure 3 As can be seen, a light feed section 13 is present in the upper right corner of light conductor sections 7 and 8. Through this light feed section, light from the corresponding light source is coupled into light conductor sections 7 and 8. The brightness of the corresponding light conductor sections 7 and 8 can be adjusted differently by the light feed section 13.

[0031] Light conductor sections 7, 8, and 9 radiate light forward and perform different light functions in the lighting lamp 1. Light conductor section 7 is used to generate daytime running lights or position lights depending on the operating mode. Similarly, light conductor section 8 functions as daytime running lights in one operating mode and as position lights in another. In contrast, light conductor section 9 serves as a driving direction indicator (flasher), which displays the expected driving direction by periodically flashing when the vehicle turns. The light source and corresponding light feed section provided for light conductor section 9 are not visible from the diagram shown. White light is fed into light conductor sections 7 and 8, while yellow light is coupled into light conductor section 9. Therefore, light conductor sections 7 and 8 radiate white light when the corresponding light source is activated, while light conductor section 9 emits or flashes yellow light.

[0032] To provide attractive location lighting and daytime running lights with high repeatability, a baffle 11 is used according to the present invention, the baffle from... Figure 2 Top view and Figure 3 This can be seen in the exploded diagram. Here, for clarity, in Figure 2 Remove the retaining frame 10. The baffle 11 is a frame component made of translucent or transparent plastic, which is used in the lighting fixture according to... Figure 2 In the top view, optics 3, 4, 5, and 6 are surrounded. For example, the baffle is made of polycarbonate or PMMA (polymethyl methacrylate). The front side of the baffle 11, pointing towards the cover plate 14, has an opaque chromium coating in a portion of its area, which is applied, for example, by a PVD method (e.g., sputtering). Figure 2 The coated baffle section is indicated by reference numeral 11a in the attached drawing, with its edges represented by a dashed line. The light-conducting section 7 is located after the baffle section 11a. In addition to the baffle section 11a, the remaining areas of the baffle—apart from the baffle sections 11b and 11c, which will be described below—are also provided with an opaque chromium coating.

[0033] To allow light from the photoconductor segment 7 to exit via the coated baffle segment 11a, multiple small exit openings, or exit points, are provided in the baffle segment 11a, for example, constructed in the coating of the baffle segment 11a using a laser. These light exit points are located in... Figure 2 For clarity, only part of the figures are indicated by reference numeral 12. The light emission points, when activated in the light conductor section 7, achieve a very attractive appearance for daytime running lights or position lights, while simultaneously preventing glare from oncoming traffic. The diameters of the individual light emission points 12 are partially chosen to be different sizes, and the light emission points are unevenly distributed on the baffle section 11a. In this way, the observer is provided with a perception of connection to the starry sky.

[0034] Unlike the coated baffle section 11a, the baffle section 11b, located below optics 3 and 4 and above baffle section 11a, is uncoated and therefore translucent. For illustration, the edge of baffle section 11b is indicated by a dashed dotted line. The translucency of baffle section 11b ensures that a sufficiently bright flash is generated when the light conductor section 9, located directly behind baffle section 11b, is activated, and this flash is well perceived by other road users. Similar to baffle section 11b, another baffle section 11c, extending above optics 3 to 6 and positioned before light conductor section 8, is also uncoated and therefore translucent. This ensures good perceptibility of the daytime running lights or position lights generated in the corresponding operating modes.

[0035] As mentioned above, the light conductor sections 7 and 8 can generate not only daytime running lights but also position lights depending on the operating mode. For example, the position lights can be activated when a vehicle is parked at the edge of the road or, if necessary, when the vehicle is driving at night with its low beams on. When the position lights are activated, light radiation occurs both through the light emission point 12 of the baffle section 11a and through the transparent baffle section 11c. Daytime running lights are typically activated when driving at the brightness of the headlights with the low beams off. Similar to the position lights, the light radiation of the daytime running lights occurs via the light conductor sections 7 and 8 through the corresponding baffle sections 11a and 11c. However, unlike the position lights, when the daytime running lights are activated, the power of the light source incident on the light conductor sections 7 and 8 increases, causing the daytime running lights to emit light at a higher brightness than the position lights.

[0036] The embodiments of the present invention described above have a number of advantages. In particular, they achieve attractive lighting functionality in the form of daytime running lights and position lights in a simple manner in motor vehicle lighting. For this purpose, a baffle is used that provides light emission in certain areas through only a plurality of small light emission points. In this way, an aesthetic lighting design is achieved while simultaneously preventing glare for other road users.

[0037] List of reference numerals

[0038] 1 lighting

[0039] 2 shells

[0040] 3, 4, 5, and 6 are optical components / reflectors (first light-emitting devices) used for low beam and high beam.

[0041] 7. Photoconductor section (second light-emitting device)

[0042] 8. Photoconductor section (third light-emitting device)

[0043] 9. Photoconductor section (fourth light-emitting device)

[0044] 10. Maintain the frame

[0045] 11 baffles

[0046] 11a Opaque baffle section

[0047] 11b and 11c translucent baffle sections

[0048] 12 light exit points

[0049] 13Light feed part

[0050] 14. Cover plate.

Claims

1. A lighting lamp for a motor vehicle, the lighting lamp having a housing (2) having a light-transmitting cover (14) for emitting light from the lighting lamp (1), and having a first light-emitting device (3, 4, 5, 6) and a second light-emitting device (7) arranged in the housing, wherein, The first light-emitting device (3, 4, 5, 6) is configured to generate at least a portion of the low beam and / or high beam of the lighting lamp (1), and the second light-emitting device (7) is configured to generate at least a portion of the outline marking light and / or daytime running light of the lighting lamp (1), characterized in that, The lighting lamp (1) includes a baffle (11) which is opaque except for a plurality of light emission points (12) provided in a preset baffle section (11a), wherein light radiation from the second light-emitting device (7) toward the cover plate (14) is carried out through the preset baffle section (11a) to generate at least a portion of the outline marking lights and / or the daytime running lights, wherein each of the plurality of light emission points is a light emission surface of the baffle that appears as a dot when the baffle is observed.

2. The lighting lamp according to claim 1, characterized in that, For each light emission point (12), in a top view of the light emission point, the maximum extension dimension of the light emission point is 4 mm or less.

3. The lighting lamp according to claim 2, characterized in that, For each light emission point (12), in a top view of the light emission point, the maximum extension dimension of the light emission point is between 0.1 mm and 4 mm.

4. The lighting lamp according to claim 2, characterized in that, For each light emission point (12), in a top view of the light emission point, the maximum extension dimension of the light emission point is between 0.5 mm and 3 mm.

5. The lighting lamp according to any one of claims 1 to 4, characterized in that, The total area of ​​all light emission points (12) in the preset baffle section (11a) accounts for 10% or less of the area of ​​the preset baffle section (11a).

6. The lighting lamp according to claim 5, characterized in that, The total area of ​​all light emission points (12) in the preset baffle section (11a) accounts for 2% or less of the area of ​​the preset baffle section (11a).

7. The lighting lamp according to claim 5, characterized in that, The total area of ​​all light emission points (12) in the preset baffle section (11a) accounts for 1% or less of the area of ​​the preset baffle section (11a).

8. The lighting lamp according to any one of claims 1 to 4, characterized in that, In the preset baffle section (11a), the light emission points (12) are set to multiple different sizes, and / or the light emission points (12) are arranged in an irregular pattern in the preset baffle section (11a).

9. The lighting lamp according to any one of claims 1 to 4, characterized in that, The baffle (11) is a body made of a light-transmitting material, the body having an opaque coating in the preset baffle section (11a), the coating being removed at the location of the light emission point (12).

10. The lighting lamp according to claim 9, characterized in that, The coating is removed by laser at the location of the light emission point (12).

11. The lighting lamp according to claim 9, characterized in that, The main body of the baffle (11) is made of plastic and / or the opaque coating is a PVD coating and / or a reflective metal coating.

12. The lighting lamp according to any one of claims 1 to 4, characterized in that, The baffle (11) extends around the first light-emitting device (3, 4, 5, 6).

13. The lighting lamp according to any one of claims 1 to 4, characterized in that, The second light-emitting device (7) includes a light-conducting segment that has light radiation toward the cover plate (14).

14. The lighting lamp according to claim 13, characterized in that, The photoconductor section at least partially surrounds the first light-emitting device (3, 4, 5, 6) in a top view of the cover plate (14).

15. The lighting lamp according to any one of claims 1 to 4, characterized in that, The lighting (1) includes a third light-emitting device (8) for generating at least a portion of the outline marking lights and / or daytime running lights of the lighting (1).

16. The lighting lamp according to claim 15, characterized in that, The third light-emitting device (8) includes a light-conducting segment that has light radiation toward the cover plate (14).

17. The lighting lamp according to claim 15, characterized in that, The third light-emitting device (8) is arranged after the semi-transparent or transparent baffle section (11c) of the baffle (11) and / or above the first light-emitting device (3, 4, 5, 6).

18. The lighting lamp according to any one of claims 1 to 4, characterized in that, The lighting lamp (1) includes a fourth light-emitting device (9) for indicating the direction of travel.

19. The lighting lamp according to claim 18, characterized in that, The fourth light-emitting device (9) includes a light-conducting segment that has light radiation toward the cover plate (14).

20. The lighting lamp according to claim 18, characterized in that, The fourth light-emitting device (9) is arranged after the semi-transparent or transparent baffle section (11b) of the baffle (11) and / or below the first light-emitting device (3, 4, 5, 6).

21. A motor vehicle comprising one or more lighting lamps (1) according to any one of claims 1 to 20.

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