Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/28—Cover glass
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/25—Projection lenses
  • F21S41/255—Lenses with a front view of circular or truncated circular outline
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/36—Combinations of two or more separate reflectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
  • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes

Definitions

• Light or lighting device in particular for motor vehicles
• the invention relates to a light or lighting device, in particular for motor vehicles, with a light source and a light exit surface or plane, according to the preamble of claim 1.
• the basic design of an illumination device according to the reflection type is that it is surrounded by a parabolic reflector at the foot of the burning or light source.
• a holding device which is usually provided with a lens, is arranged in front of the reflector, i.e. in the half space into which the light is emitted.
• An attempt is made to decouple the light uniformly from the reflector zone and to bring it onto the lens system.
• Further known variants consist in providing a cylinder-shaped jacket between the reflector and lens, which captures stray light. It is essential that the headlight projection lens in known headlights or lighting devices collect all the available light and throw it forward.
• the light-emitting surface or the light exit surface or light exit plane is given by the outer surface of the headlight lens.
• a vehicle headlight has the task of ensuring illumination of the roadway in the dark, in particular in the direction of travel, and at the same time of displaying the signal image for oncoming vehicles for an approaching vehicle.
• multiple headlight arrangements are known in the prior art, in which care is taken to focus the light as well as possible. This in turn shows multiple disadvantages.
• the forward-facing space in front of the vehicle is well illuminated in the dark for the driver, but the amount of light or light energy used to illuminate is also that which represents the signal image. This means that a well-illuminating headlamp dazzles oncoming traffic in most cases. For this reason, headlight arrangements for avoiding glare effects are known in the prior art.
• a headlight for vehicles which works according to the projection type.
• the headlamp consists of a reflector, a light source, an aperture and a downstream lens.
• the luminous flux is adjusted in its vertical and horizontal basic setting with respect to a longitudinal axis of the headlamp by vertical and horizontal displacement of the lens.
• Said lens can be mounted eccentrically to the longitudinal axis of the headlamp and can be arranged essentially rotatable about the longitudinal axis of the headlamp.
• the foregoing luminous flux distribution as such is in the foreground, overall the headlight throws the entire amount of light forward.
• an attempt is made to emit as much of the amount of light onto the roadway as possible at a downward angle. In this way, an attempt is made to dazzle oncoming traffic by appropriately turning away the light cone.
• a lamp for a vehicle in which a shield is arranged in the light path between the reflector and lens, which causes shading or change in the light distribution. It should be achieved that the light beam has a reduced sharpness in the edge area. In other words, this means that the light beam is diffusely scattered outwards from an inner core area.
• the shielding element is placed in the direct light path, a not insignificant part of the available core light, i.e. not the scattered light, is shaded and is no longer available for the pure illumination function.
• DE 41 02 586 A1 discloses a headlamp which is provided with a correction device for correcting a light distribution characteristic which is caused by an inclination of a body part with respect to a roadway.
• cover means are used which change with the inclination of the vehicle or the body part.
• Such a design is used in motorcycles. But here, too, the glare in oncoming traffic is not avoided.
• a vehicle headlight projection lens which is designed to generate a low beam pattern so that the convex emission surface of the lens has different imaging sections, 3, an upper section lying above the horizontal plane through the optical axis and a lower section lying below this horizontal plane being provided, at least two lower sections being provided, one of which has an upper boundary protruding beyond the horizontal plane towards the lateral lens edge, or a continuously different imaging surface is provided.
• the light beam is divided overall into segments. This only leads to a fanning out of the actual light cone. Avoiding glare is also not guaranteed here.
• the present invention is based on the object of further developing a light or lighting device, in particular for motor vehicles of the generic type, in such a way that the signal image function of the device is glare-free while maintaining optimum illumination of the roadway.
• the object is achieved in a light or lighting device, in particular for motor vehicles, according to the preamble of patent claim 1, according to the invention in that the light exit plane consists of a part of the available light output of the light source, which allows the central source to pass almost unattenuated, as well as a said central region there is a ring-shaped surrounding outer area, which only allows the other part of the light output available to be weakened.
• the central area is preferably or in one embodiment also provided with a lens
• the main part of the available light for illuminating the road is directed at the same
• the outer area uses the remaining and / or scattered light which is oncoming traffic is facing as a signal image.
• the use of the scattered light component which is no longer reflected back into the main light cone, through an outer ring area, which turns the light in question to oncoming traffic, attenuates it without glare. This means that the light that emits via the outer ring area of the light exit plane only represents the signal image.
• the further glare-free weakening of said light part in said annular outer region can be achieved by weakening the inner surfaces or reflecting them with a defined transmittance.
• the total available light output of the light source is used by the inventive design of the lighting device.
• the main part of the light is turned away from oncoming traffic to illuminate the road, for example by means of a lens, and directed onto the road for illumination.
• Only the outer area is unresponsive to oncoming traffic and only uses the residual light component, the attenuation of its intensity, as already stated, can also be achieved by partial metal vapor deposition.
• the illumination device can be of the reflection type, so that a reflector is arranged behind the light source.
• the reflector can be positioned in relation to the light source in such a way that the core light reflection can be projected onto the central area of the light exit surface, and the remaining scattered light yield illuminates the outer area.
• the central region can be formed by a lens or contain such a lens.
• the outer region is mirrored in such a way that said scattered light component shines through it translucently starting from the light source and appears mirrored when the light comes from the front.
• Figure 1 Section through a lighting device according to the invention.
• Figure 2 Front view.
• Figure 1 shows a section through a headlamp designed according to the invention. The same is arranged within a lamp housing 30.
• the essential elements are the lamp 1, which is arranged centered in a reflector 2.
• the light emitted by the lamp 1 is directed via the reflector 2 essentially onto the lens 11 arranged in front of it.
• Said lens 11 is arranged in the so-called central region according to the invention of the entire light exit surface.
• the entire light exit surface is realized by the entire cover 21, which is done in the manner according to the invention described below.
• the core light of the reflector 2 is projected onto the lens 11, during which the scattered light strikes the partially mirrored ring surface 22.
• the partial mirroring is provided so that the residual light present in the lamp housing 30 can shine through the partially mirrored ring surface 22.
• the partial mirroring of the ring surface 22 is designed or understood in such a way that the residual light present in the lamp housing 30 can penetrate the said mirrored ring surface and is only slightly damped.
• the said mirroring to this extent shows a mirror effect in a front view, i.e. looking at the same or the cover from outside the lamp housing, so that one cannot look into the same from outside the lamp housing.
• the contour 23 of the cover 21 only forms a ring, in which either the lens 11 is embedded or which contains a transition from the remaining area of the cover into the lens area.
• the lens 11 can also be incorporated into the cover with o tet so that lens 11 and cover 21 are in one piece. That is, the inner region 10 and the outer region 20 of the cover 21 then merge into one another.
• FIG. 2 shows only schematically the arrangement of the lighting device in an installation slot 40.
• the installation slot 40 can be located, for example, in the front area of the motor vehicle on both sides next to the radiator slots.
• the delimitation of the actual lamp cover 21 in the central region 10, which contains the lens, and the outer ring region 20 according to the invention can be clearly seen.
• the outer ring region 20, ie the area between the two thick circular lines shown, is mirrored in the manner according to the invention .
• This causes the core light of the lamp projected onto the lens by the reflector 2 through the central region 10, i.e. the lens arranged behind or in front of it, to leave the lamp housing.
• This cone of light is used to illuminate the road and is directed towards it, i.e., dimmed from the oncoming traffic field of vision.
• the residual light within the lamp housing is emitted to the outside in an attenuated manner.
• the light cone 10 leaving the central area is dimmed from oncoming traffic, but is recognizable as a clearly brighter circular area.
• the outer ring surface is damped, so that overall there is a signal image for oncoming traffic. This means that all light is divided accordingly, the central area is only focused on the road, i.e., dimmed, and the circular ring surface as a signal image faces the oncoming traffic in an unattenuated manner.
• webs 11 are arranged in the contour of the cover, which are used only for fastening the circular ring 23 shown in FIG. 1 for receiving the lens 11.
• the representation of the webs 11 is only schematic and otherwise requires no further execution.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7861203

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (14)

Citations (9)

Family Cites Families (2)

• 1998
  • 1998-03-17 DE DE19811570A patent/DE19811570C2/de not_active Expired - Fee Related
• 1999
  • 1999-02-04 JP JP2000537005A patent/JP2002507052A/ja not_active Withdrawn
  • 1999-02-04 EP EP99913139A patent/EP1064496B1/de not_active Revoked
  • 1999-02-04 CN CN99804061A patent/CN1105261C/zh not_active Expired - Fee Related
  • 1999-02-04 KR KR1020007010233A patent/KR20010041925A/ko not_active Application Discontinuation
  • 1999-02-04 WO PCT/EP1999/000734 patent/WO1999047852A1/de not_active Application Discontinuation
  • 1999-02-04 ES ES99913139T patent/ES2199566T3/es not_active Expired - Lifetime
  • 1999-02-04 DE DE59905646T patent/DE59905646D1/de not_active Expired - Lifetime

Patent Citations (9)

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