JPH06199175A - Vehicle lighting device - Google Patents

Abstract

PURPOSE: To prevent the driver of an opposite vehicle from being dazzled by means of a light beam radiated from a headlight arranged on a vehicle side faced away from an opposite vehicle side. CONSTITUTION: A headlight arranged on a vehicle side facing away from an opposite vehicle side radiates a light beam dispersed in a horizontal direction. The light beam has a substantially horizontal upper bright/dark limit 22 and it illuminates the opposite vehicle side. The light beam that the headlight arranged on the vehicle side facing the opposite vehicle side illuminates the traffic side of the vehicle and an edge region outwardly adjoining the traffic side. A bright/dark limit 30 above the light beam is arranged to be higher than the bright/dark limit 22 above the light beam radiated by the first headlight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle of the type having at least two headlights, each of which emits a different luminous flux having at least one upper light-dark boundary. Lighting device.

[0002]

A lighting device of this type is known from DE 15 97 977 and drawings. This known lighting device has a number of headlights. The light flux emitted by these headlights illuminates the area in front of the vehicle in different ways. For example, a dimming headlight for illuminating the basic luminous flux is provided, and the basic luminous flux is symmetrical, has a horizontal upper and lower boundary line, and does not dazzle an oncoming driver. Is done. Further, a headlamp for irradiating an additional light flux for a highway and a headlight for irradiating an additional light flux for a highway are provided, and one or the other headlight is selectively used. The light flux has an upper bright-dark boundary line that extends obliquely upward toward the edge of the traveling road surface on the traveling side of the vehicle. Especially when the road surface is wet, the light flux emitted from the headlight is reflected by the road surface, causing the driver of the oncoming vehicle to glare. This glare jeopardizes the driving of oncoming vehicles and should be avoided.

Further, in a dimming headlight of a vehicle, tilt adjustment is performed by an adjusting device so that the direction of the luminous flux emitted by the dimming headlight is maintained constant regardless of the load of the vehicle. It is known to prevent the driver of an oncoming vehicle from being dazzled when the vehicle is under load. In this case, both dimming headlights of the vehicle normally emit the same luminous flux and illuminate both the traveling side and the oncoming side of the vehicle, so separate control devices are provided for both dimming headlights. It is necessary and therefore expensive.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is that the luminous flux emitted from a headlight arranged on the vehicle side opposite to the oncoming vehicle side illuminates the traveling road surface in front of the vehicle only slightly. The light reflected by the wet road surface should be small so that the driver of the oncoming vehicle will not be dazzled.

[0005]

In order to solve this problem, in the structure of the present invention, in the lighting device of the first type, the headlamp arranged on the vehicle side opposite to the oncoming vehicle side. Irradiates a light beam diffused in the horizontal direction, and this light beam has an almost horizontal upper and lower boundary line, illuminates at least the oncoming vehicle side, and is placed on the vehicle side toward the oncoming vehicle side. The light beam emitted by the headlight illuminates the vehicle's running side and the edge region that continues to the outside, and the light-dark boundary above this light beam is at least partly above and below the light beam emitted by the other headlight. It is located above the boundary line.

[0006]

With this configuration, the problems of the present invention can be solved. In addition, the light flux that illuminates only the traveling side of the vehicle by the headlights located on the vehicle side of the oncoming vehicle side is reflected only slightly by the wet road surface, and the driving of the oncoming vehicle It does not dazzle anyone.

Claims 2 and below describe advantageous embodiments of the invention. By superimposing both light fluxes as described in claim 2, the traveling side of the vehicle is illuminated well. According to the seventh aspect, in the lighting device according to the present invention, in order to prevent the driver of the oncoming vehicle from being dazzled when the vehicle has a load, only the inclination of the headlight that illuminates the oncoming vehicle side. Is sufficient, and therefore only one adjusting device is required for the vehicle.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be specifically described below with reference to the embodiments shown in the drawings.

The vehicle shown in FIG. 1 has a lighting device consisting of at least two headlights 10 and 11. Headlight 1
0 is arranged on the left side of the vehicle in the traveling direction, and the headlight 11 is arranged on the right side. This vehicle is a right-hand vehicle. The headlights 10 and 11 are dimming headlights, and the vehicle is additionally provided with a long-distance headlight (not shown).

The headlights 10 and 11 are, as shown in FIG. 2, respectively, a reflector 13 and a light source 14 in a known form.
And a lamp glass 16. The light source 14 is an incandescent lamp or an air discharge lamp. The lamp glass 16 is a transparent glass plate without a molding, or is provided with an optical element that diffuses and / or redirects the light reflected from the reflector 13. Instead of its own light source 14, the headlights 10 and 11 can have a light guide 15 which is shown in broken lines in FIG. 2, in which case the headlight is provided by this light guide to an external light source (see FIG. Connected (not shown).

FIG. 3 shows a measuring screen 17, which is arranged at a distance from the vehicle and perpendicular to the longitudinal axis 19 of the vehicle. The measurement screen 17 has a vertical center plane V-V and a horizontal center plane H.
-H is entered. The measurement screen 17 represents a traveling path in front of the vehicle, and in the case of traveling to the right, the vertical center plane V
The left side of −V is the oncoming vehicle side, and the right side is the traveling side of the vehicle. When the headlight 11 on the right side is turned on, it emits a light beam that is diffused in the horizontal direction.
The area 20 below the horizontal center plane H-H and on both sides of the vertical center plane V-V, that is, the oncoming vehicle side and the vehicle running side are illuminated. The range 20 illuminated by the light flux of the right headlight 11 is limited upward by a horizontal light-dark boundary line 22. Downward, the area 20 is bounded by another horizontal light-dark boundary 23. Measuring screen 17
The area 25 below the lower light / dark boundary 23 is not illuminated at all by the right headlight 11, or at least significantly less intensely than the area 20. Therefore, the near area in front of the vehicle, which corresponds to the area 25 below the light / dark boundary 23 below the measuring screen 17, is not illuminated by the right headlight, or is only weakly illuminated. The intensity with which the area 25 is illuminated is subject to the minimum illuminance, if that is regulated by law. Alternatively, the right headlamp 11 may illuminate only the area on the left side of the vertical center plane VV and not the area on the right side of the vertical center plane VV.

The luminous flux emitted by the left headlamp 10 illuminates only the area 26 on the right side of the vertical center plane V--V of the measuring screen 17 in general. This area 26 is bounded upwards by a light-dark boundary 28, which in the illustrated embodiment is the measuring screen 17.
Extending diagonally upward toward the right edge of the. But range 2
6 may be limited upward by a light-dark boundary 30 shown by a broken line in FIG. 3, and the light-dark boundary 30 is arranged above the light-dark boundary 22 of the range 20. To the left, the range 26 is bounded by a lateral light / dark boundary 29,
Is within the range 20 illuminated by the right headlight 11,
That is, it is located below the light-dark boundary line 22. If a horizontal upper light / dark boundary 30 is used, the lateral light / dark boundary 29 will extend upward beyond the light / dark boundary 22 of the area 20. The lateral light-dark boundary 29 is shown in FIG.
The curved line may be extended as shown in Fig. 3, or may be a straight line which is vertical or inclined, and is substantially within the range of the vertical center plane VV, or from the vertical center plane VV. It is arranged to be shifted toward the side. The lower end of the light-dark boundary line 28 extending obliquely upward reaches the light-dark boundary line 22 above the range 20 illuminated by the right headlight 11. Therefore, the light flux emitted from the left headlight 10 illuminates the near range, the far range and the outer edge range on the traveling side of the vehicle, whereas the oncoming vehicle side is not illuminated by this light flux.

When both headlamps 10 and 11 are turned on at the same time, the measuring screen 17 is illuminated by the asymmetric light beam, which is known in the case of dimming headlamps. On the side of the oncoming vehicle, the illuminated area on the measurement screen 17 is the area 2
It is bounded by a light / dark border 22 above 0 and on the vehicle side of the vehicle by a light / dark border 28 extending obliquely above range 26, or alternatively by a horizontal light / dark border 30. The above description is for the case of traveling on the right side, and is reversed for the case of traveling on the left side, and the headlight 11 on the right side is the vertical center plane V-
Only the left side of V is illuminated, and the left headlamp 10 illuminates the area 20 of the measuring screen 17.

If the range 20 illuminated by the right headlight 11 extends on both sides of the vertical center plane V--V as shown in FIG. 3, this range is indicated by reference numeral 31 and the vehicle runs. On the side it overlaps the area 26 illuminated by the left headlight 10. As a result, the range 31 is illuminated with a strong brightness, and the traveling side of the vehicle is illuminated particularly strongly.

The light flux emitted from the left headlight 10 illuminates the traveling side of the vehicle exclusively, so that the light flux is not reflected by the wet road surface and does not dazzle the driver of the oncoming vehicle. The light flux emitted from the right headlight 11 does not illuminate the traveling path in the near range in front of the vehicle or only weakly illuminates it. Therefore, when this luminous flux is also reflected by the wet traveling road surface, Do not dazzle the driver of the car.

In order to produce the luminous flux necessary to illuminate the measuring screen 17 in the manner described above, the headlamp 10
The reflectors 13 and 11 can be configured as follows. That is, the reflector 13 reflects the light emitted from the light source 14 or the light guide 15 to generate a desired luminous flux. Alternatively, the reflected light of the reflector 13 can be converted into a desired luminous flux by an optical element provided on the lamp glass 16.

Further, for the illumination device described above, an adjusting device 32, which is simply shown in FIG. 2, can be provided to adjust the inclination of the headlight 11 that illuminates the oncoming vehicle side.
With this adjusting device 32, the inclination value of the headlight 11 toward the traveling road surface is made stronger than the inclination value in the state without load, and the bright / dark boundary line 22 above the light flux of the headlight 11 has load. Even in the state, it is possible to occupy a position where the driver of the oncoming vehicle is not dazzled. In this case, it is possible to adjust the entire headlight 11 or only its reflector 13 by means of the adjusting device 32. The adjusting device 32 can act automatically, in which case it is necessary to adjust the headlight 11 in order to measure the load of the vehicle and not to dazzle the driver of the oncoming vehicle by providing a control device. If this is the case, initiate the action of the regulator. However, it is also possible for the driver of the vehicle to manually operate the adjusting device. The adjusting device 32 can act electromagnetically, hydraulically or pneumatically. Since the other headlight 10 illuminates only the running side of the vehicle, no adjustment device is required for this headlight 10.

[Brief description of drawings]

FIG. 1 is a plan view of a vehicle.

FIG. 2 is a sectional view of a vehicle headlamp.

FIG. 3 is a diagram showing a range of a measurement screen illuminated by a vehicle headlight.

[Explanation of symbols]

10 and 11 headlights, 13 reflectors, 14
Light source, 15 light guide, 16 lamp glass, 17
Measuring screen, 19 vehicle longitudinal axis, 20 range, 22 and 23 light / dark boundary, 25 and 26 range, 28/29 and 30 light / dark boundary, 31 range, 32 adjustment device, H horizontal center plane, V vertical center plane

Claims (7)

[Claims] 1. At least two headlights (10/11)
And each of these headlights (10, 11) has at least one upper light-dark boundary (22, 28; 30)
In a lighting device for a vehicle of a type that emits different light fluxes, a headlight (11) arranged on the vehicle side opposite to the oncoming vehicle side emits a light flux diffused in the horizontal direction, This luminous flux is almost horizontal and has a bright and dark upper boundary line (22).
And a light beam emitted by a headlight (10) which illuminates at least the oncoming vehicle side and which is arranged on the vehicle side of the oncoming vehicle side has an edge range continuing to the running side and the outside of the vehicle. Illuminating, the upper light-dark boundary (28; 30) of this light beam is arranged at least partially above the upper light-dark boundary (22) of the light beam illuminated by the other headlight (11). A lighting device for a vehicle, which is characterized in that 2. The light flux emitted by a headlight (11) arranged on the vehicle side opposite to the oncoming vehicle side illuminates the oncoming vehicle side and the traveling side of the vehicle, and the traveling side of the vehicle is the range of the traveling road surface. The lighting device according to claim 1, wherein the lighting device is illuminated by both headlights (10, 11). 3. A light beam emitted by a headlight (10) arranged on the vehicle side of the oncoming vehicle side has a light-dark boundary line (29) laterally toward the oncoming vehicle side. 1 or claim 2
Illumination device described. 4. A light beam emitted by a headlight (11) arranged on the vehicle side opposite to the oncoming vehicle side has a substantially horizontal light-dark boundary line (23) below, and this light-dark boundary line. The range below is not illuminated by the light beam in front of the vehicle, or is illuminated with at least a little lighter than the range (20) above the light-dark boundary (23). The illumination device according to any one of items 3 to 3. 5. An upper light / dark boundary line (28) of a light beam that illuminates only the traveling side of the vehicle extends obliquely upward from an upper light / dark boundary line (22) of the other light beam toward an outer edge range. The illuminating device according to any one of claims 1 to 4, which is provided. 6. The light / dark boundary line (30) above the light beam that illuminates only the traveling side of the vehicle is arranged substantially horizontally and above the light / dark boundary line (22) above the other light beam. The lighting device according to any one of claims 1 to 4. 7. The headlight (11) arranged on the side of the vehicle opposite to the side of the oncoming vehicle, whose inclination can be adjusted by an adjusting device (32). The illumination device according to item 1.