KR20010041925A - Lighting or illuminating device, especially for motor vehicles - Google Patents

Abstract

The present invention relates to a lighting or lighting device, in particular for automobiles, comprising a light source and a light exit surface or a light exit plane according to the preamble of claim 1. In order to ensure that the signal function of such a device is achieved without glaring while maintaining optimal illumination of the driveway in such types of lighting or lighting devices, the light exit plane nearly attenuates some of the available amount of available light of the light source. It consists of a central zone 10 transmitting through it and an outer zone 20 which annularly surrounds the central zone 10 and only transmits while attenuating the remaining available portion of the amount of light obtained.

Description

Lighting or lighting devices such as those used in automobiles {LIGHTING OR ILLUMINATING DEVICE, ESPECIALLY FOR MOTOR VEHICLES}

Basically, lighting devices for automobiles in particular are divided into projection type and reflection type. The basic structural form of the lighting device according to the reflection type is such that the luminous source or light source is configured to be surrounded by a parabolic reflector at the bottom thereof. In the front of the reflector, that is, in the half space where the light rays are emitted, a holding device having a lens is usually disposed. In that case, light rays are attempted to come out of the reflective zone in the same form and reach the lens system. Another known modified illumination device consists of a configuration for providing a cylindrical coating for trapping scattered light between a reflector and a lens. In that case, it is important that the headlamp projection lens of a known headlamp or lighting device focuses all of the available rays and projects them forward. The light emitting surface or the light emitting surface or the light emitting surface is provided by the outer surface of the headlamp lens.

The task given to vehicle headlights is to ensure the lighting of the roadway in the dark, especially in the direction of travel, while simultaneously displaying a signal image that the vehicle is approaching the vehicle coming from the opposite side. With such a task in mind, a number of headlamp devices are known in the prior art which allow the light to focus as well as possible. However, such headlamp devices also present a number of disadvantages. On the other hand, although it is good to illuminate the forward-facing space in front of the vehicle when it is dark to the vehicle driver himself, in most cases the amount of light or light energy used for such illumination is still the amount of light or light energy that is indicative of the signal phase. Dazzling vehicles on the way.

For that reason, headlight devices are known in the prior art for preventing the dazzle effects caused by glare.

Vehicle headlights are known which are projected from DE 19 625 923 A1. Such headlamps consist of a reflector, a light source, a light shielding device, and a subsequently connected lens. In that case, the ray flow is set to the vertical and horizontal base position with respect to the longitudinal axis of the headlamp by the vertical and horizontal movement of the lens. In addition, the above-described lens may be mounted eccentrically with respect to the longitudinal axis of the headlamp so as to be rotatable about the longitudinal axis of the headlamp. In that case, the above-mentioned light beam flow itself is distributed in the front ground. In total, such headlights emit all of the light forward. In that case as well as in other known systems, the maximum amount of light is attempted to radiate to the driveway at a downward angle. Thereby, an attempt is made to realize shading on the oncoming vehicle by correspondingly diverting the cone rays of the headlamps.

BACKGROUND ART Vehicle lighting devices are known from DE 19 715 693 A1 which are arranged with a light shielding device which darkens or alters the light distribution in the light path between the reflector and the lens. In that case, the light beam shows the light intensity attenuated at the edge region. In other words, the light beam is scattered outwardly from the inner central zone.

However, since the shading element is not located in the direct light path, not many of the available center rays, ie scattered light rays, are dimmed and no longer provide full illumination function.

It is known from DE 41 02 586 A1 a headlamp provided with a correction device for correcting the characteristics of the light distribution, such correction being made by tilting the body part relative to the roadway. For that purpose, cover means are used, which change with the inclination of the vehicle or body part. Such structural forms are used on motorcycles. However, even in that case, glare on the oncoming vehicle is not avoided.

Vehicle headlight projection lenses are known which have sections with differently formed convex radiating surfaces of the lens to produce a low beam pattern from European patent application EP 0 23 780 A2, which passes through the optical axis. An upper section lying on top of the horizontal plane and a lower section lying on the bottom of the horizontal plane, wherein at least two lower sections are provided, one of which has an upper boundary which projects beyond the horizontal plane toward the lateral lens edge, or is continuous As a result, differently formed surfaces are provided. In that case as well, the light beam is divided into segments as a whole. It is merely a sectoral split of the inherent cone rays. In that case too, preventing the dazzle effect of glare is not guaranteed.

The present invention relates to a lighting or lighting device, in particular for automobiles, comprising a light source and a light exit surface or a light exit plane according to the preamble of claim 1.

1 is a cross-sectional view of a lighting device according to the present invention.

2 is a front view of the lighting apparatus according to the present invention;

Accordingly, an object of the present invention is to start from the above-mentioned problems and to improve the presupposed type of lighting or lighting device, especially for automobiles, so that the signal function of such a device is achieved without causing glare while maintaining optimal lighting for the roadway. will be.

Such an object is in accordance with the preamble of claim 1 particularly in a motor vehicle lighting or lighting device according to the invention a central region through which the light exit plane transmits almost without attenuating a part of the amount of available light of the light source and its center. This is achieved by enclosing the zone in an annular manner and consisting of an outer zone that only transmits while attenuating the remaining available portion of the amount of light obtained.

Another preferred configuration of the invention is disclosed in the remaining dependent claims.

The core of the present invention is a residual afterglow with the central zone preferably or in one embodiment having a lens that focuses most of the light rays available for illumination of the driveway, with the outer zone facing the vehicle side facing the signal. And / or using scattered light. The use of the scattered light portion of the conical main beam, which is not reflected again, through the outer annular zone that directs the light portion toward the opposite vehicle is attenuated without causing glare. That is, the light rays emitted via the outer annular zone of the light exit plane only display the signal phase.

Significantly attenuating such light portions without causing glare in the outer annular region described above can be realized by forming the inner surface into a mirror surface that is attenuated or has a limited transmittance.

In total, all the amount of available light available of the light source is utilized by the construction of the lighting device according to the invention. For the illumination of the driveway, in the central part of the beam, ie the aforementioned central zone, the main light beam part is led out of the vehicle on the opposite side by means of a lens and illuminated, for example. Only the outer zones are facing the opposite vehicle, and such outer parts only use afterglow parts whose strength can be attenuated by partial deposition plating of metal as described above.

In other words, it is very desirable to distribute the light beam from the light source so that on the one hand the lights are optimally illuminated without causing glare to the oncoming vehicle, and on the other hand the signal image of the lighting device towards the oncoming vehicle is attenuated without causing glare. It's simple.

In a preferred configuration, the lighting device can be of a reflective type such that the reflector is arranged behind the light source.

In addition, the reflector can be positioned relative to the light source such that the central reflected light can be projected to the center region of the light exit plane and the remaining amount of scattered light obtained is irradiated to the outer region.

As mentioned above, the central zone may be formed by or include such a lens.

In a particularly preferred configuration, the outer zone is formed in the mirror plane such that the above-mentioned scattered light portion is transmitted from the light source through the outer zone and the outer zone shines like a mirror from the front.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 shows a cross-sectional view of a headlamp formed in accordance with the present invention. Such headlamps are arranged inside the lamp housing 30. An essential component of the headlamp is a lamp 1 which is arranged centered in the reflector 2. In such a configuration, the light rays emitted from the lamp 1 are directed toward the lens 11 disposed in front of the reflector 2 via the reflector 2. Such a lens 11 is arranged in the so-called central zone according to the invention in the entire light flux plane. However, the entire ray exit plane is embodied by the overall cover 21, which is of the type according to the invention described below. However, the total light rays available inside the lamp housing 30 include not only the light beams from the reflector 2 towards the lens 11 but also the so-called afterglow present inside the lamp housing 30, such afterglow. Is diffused and scattered inside the lamp housing 30, rather than from the reflecting mirror 2 to the lens 11. In that regard, in a known lighting device, an element in the form of a cylindrical sheath, which returns such scattered light rays back to the optical path of the lens, has been disposed between the reflector and the lens. However, in the headlamp according to the invention or in the lighting device according to the invention it is realized differently. Afterglow, which is scattered inside the lamp housing 30 and is not guided at least directly by the lens 11, i.e. not drifting on a predetermined focal point, is completely intentionally partly mirror surface of the cover 21. The annular surface 22 is formed.

That is, the center ray of the reflecting mirror 2 is projected onto the lens 11, while the scattered light reaches the annular surface 22 formed as the partial mirror surface. In that case, forming into the partial mirror surface is such that afterglow existing in the lamp housing 30 can be transmitted through the annular surface 22 formed as the partial mirror surface. In that regard, forming the annular face 22 as a partial mirror face should be understood or mean that afterglow present in the lamp housing 30 can penetrate the annular face formed by the mirror face and is only slightly damped. will be. However, such a mirror surface may be properly mirrored again in front view, i.e., when the lamp housing or cover is seen from the outside of the lamp housing, so that the lamp housing cannot be seen from the outside of the lamp housing. Will be given.

The outer portion 23 of the cover 21 forms a simple ring consisting of a portion into which the lens 11 is fitted or transitioned from the remaining area of the cover to the lens area. However, the lens 11 may be processed together with the cover 21 so that the lens 11 and the cover 21 are integrally formed. That is, in that case, the inner zone 10 and the outer zone 20 of the cover 21 are transferred to each other by material coupling.

2 only schematically illustrates the arrangement of a lighting device on the built-in shaft 40. In that case, the built-in shaft 40 may be arranged adjacent to the cooler slit on both sides of the front section of the motor vehicle, for example. It can be clearly seen that the inherent lamp cover 21 borders on the central region 10 comprising the lens and the outer annular region 20 according to the invention. The outer annular zone 20, ie the face between the two thick circular lines shown, is formed as a mirror face in the form according to the invention. Thereby, the central ray of the lamp projected from the reflector 2 to the lens leaves the lamp housing through the center zone 10, ie the lens disposed before and after. Such conical rays serve to illuminate the driveway and point towards the driveway. In other words, a low beam is taken out of the field of view of the oncoming vehicle. Afterglow in the interior of the lamp housing is emitted outwardly attenuated through the corresponding annular face 20 formed as a mirror face. That is, for the oncoming vehicle, the central circular surface of the bright beam that shines brightly and the second annular surface that is emitted with effective illuminance from the outside appear. Conical rays leaving the central zone 10 are projected as low beams for oncoming vehicles, but can be perceived as clearly bright circular faces. The outer annular face is attenuated to provide a signal phase for the overall oncoming vehicle. That is, all the rays are split into an annular face that is focused only on the driveway, ie the center area that becomes the low beam and the facing vehicle with the rays attenuated.

Thereby, the above-described function of using the central reflected light to illuminate the roadway and forming a signal without causing afterglow glare is realized.

In addition, it can be seen that the bridge 11, which serves to fix the annular ring shown in FIG. 1 to accommodate the lens 11, is disposed at the outer portion of the cover. The bridge 11 is shown only schematically and in this case does not require any other configuration.

Claims (6)

In a lighting or lighting device such as used in automobiles having a light source and a light exit surface or a light exit plane, The light exit plane annularly surrounds the central zone 10 and the central zone that transmits with little attenuation of the available amount of available light of the light source and transmits with only attenuation of the available remaining amount of light obtained. Lighting or lighting device, characterized in that consisting of only the outer zone (20). A lighting or lighting device according to claim 1, wherein the lighting or lighting device is reflective and a reflector (2) is arranged behind the light source. 3. The reflector (2) according to claim 2, characterized in that the reflector (2) is positioned with respect to the light source so that the central reflected light can be projected in the central zone (10) of the light exit plane and the remaining amount of scattered light obtained is irradiated to the outer zone (21). Lighting or lighting device. A lighting or lighting device according to any one of the preceding claims, wherein the central zone (10) has a lens (11) or is formed as a lens. The outer zone is formed in a mirror plane such that the scattered light portion is transmitted through the outer zone from the light source and the outer zone shines like a mirror from the front. Lighting or lighting device. The method according to any one of claims 1 to 5, wherein the separating or dividing the light outlet plane or the light outlet face into a central zone 10 and an outer zone 20 annularly arranged around the central zone is claimed. Wherein the center zone is a low beam to illuminate the driveway and the outer zone is to produce a signal phase directed towards the oncoming vehicle with scattered and attenuated.