WO2005007450A1 - Interior lamp, especially for a vehicle - Google Patents

Interior lamp, especially for a vehicle Download PDF

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Publication number
WO2005007450A1
WO2005007450A1 PCT/EP2004/007499 EP2004007499W WO2005007450A1 WO 2005007450 A1 WO2005007450 A1 WO 2005007450A1 EP 2004007499 W EP2004007499 W EP 2004007499W WO 2005007450 A1 WO2005007450 A1 WO 2005007450A1
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WO
WIPO (PCT)
Prior art keywords
light
interior
function
normal
ambient
Prior art date
Application number
PCT/EP2004/007499
Other languages
German (de)
French (fr)
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WO2005007450A8 (en
Inventor
Carsten Lauber
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to US10/534,693 priority Critical patent/US20060215414A1/en
Priority to JP2005518217A priority patent/JP2006510547A/en
Priority to EP04740802A priority patent/EP1578643A1/en
Publication of WO2005007450A1 publication Critical patent/WO2005007450A1/en
Publication of WO2005007450A8 publication Critical patent/WO2005007450A8/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/70—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose
    • B60Q3/74—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2500/00—Special features or arrangements of vehicle interior lamps
    • B60Q2500/30—Arrangements for illuminating different zones in the vehicle, e.g. front/rear, different seats

Definitions

  • the invention relates to an interior light according to the generic features of claim 1.
  • a generic interior light is known for example from the E-Class from Mercedes-Benz.
  • An interior light is arranged in the roof control unit, which has a light bulb as a normal lighting function, the light of which is scattered into the vehicle interior through a conventional diffusing screen.
  • an ambient luminaire is provided as a second luminaire, which consists of a curved light guide into which the light from a light-emitting diode is introduced laterally. This light is guided through the light guide and emerges as ambient light at the fault points over the entire surface of the light guide.
  • DE 100 32 927 AI and DE 101 49 044 AI disclose a lighting device for illuminating the interior of a motor vehicle.
  • the lighting device has at least one lamp and at least one plate-shaped or rod-shaped light guide arranged with its light coupling surface in the light-emitting region of the lamp.
  • the light guide has a plurality of light coupling points spaced apart from the light coupling surface.
  • the light guide In at least one beam path running from the light coupling-in area to one of the light coupling-out points, the light guide has at least one reducing point which forms a diaphragm and is arranged and / or designed such that the light intensity of the light emerging at the individual light coupling-out points is attenuated differently is.
  • the reducing point is provided with an opaque cover at least on the light coupling-out side of the light guide.
  • the disadvantage is that the two lights in the roof control panel require a lot of installation space. On the one hand, the normal interior lighting and then the ambient lighting on the right and left in the roof control panel, which surrounds the roof control unit as a light ring.
  • the object of the invention is therefore to arrange an interior lamp that combines various lighting functions in a small space.
  • 1 is a roof control panel with interior lighting
  • Fig. 2 is a schematic sectional view of an interior lamp with normal and ambient light function.
  • Fig. 3 is a schematic sectional view of an interior light with normal light function with an integrated reading light and ambient light function.
  • the 1 shows a roof control part 1 which has an area with control elements 3 for operating the interior lighting and an interior light 2.
  • This interior light 2 has a normal and an ambient light function.
  • the normal light function has, as normal interior lighting 2, a diffusing screen 12 as a cover which scatters the light from the light bulb 11 arranged below the diffusing screen 12 to the outside.
  • the diffusing screen 12 is a light guide 4.
  • Light 6 is laterally coupled into this light guide 4 by a light-emitting diode 6, which propagates along the light guide 6 and is coupled out as ambient light at the provided defects 9 in the light guide 6.
  • the surface Structuring can, for example, have a regular or irregular roughness, microprisms, grooves, a varnish or the like, which differs from a smooth surface, at which a total reflection of the light guided in the light guide 6 does not occur or only occurs to a limited extent and thus the light decouples from the light guide 6.
  • the ambient light function 6 is only active when the normal light function 11 is switched off.
  • the normal light function 11 is only active when the ambient light function 6 is switched off.
  • the various light functions 6, 11 can be switched on by means of a control element provided for this purpose. However, it can also be switched on automatically, for example when the door is opened, the normal interior lighting 2 is switched on during the day, while the ambient lighting function 4 is activated via a light or rain sensor or when the driving lights are switched on.
  • the normal light function 2 is formed by an incandescent lamp 11, the light of which is directed by a reflector 7 in the direction of the lens 12.
  • Scattering points 8 are arranged on the inside of this lens 12, which scatter the light into the interior in all directions. These scattering points 8 are usually arranged on the inside of the lens 12 so that the interior lamp 2 has a smooth surface as desired by the design.
  • the scattering points 8 can also be located on the surface of the scattering disc 12 and only scatter the light into the interior of the vehicle after the light has passed through the scattering disc 12.
  • the normal 2 and the ambient light function 4 are switched on independently of each other.
  • the normal light function 11 When the normal light function 11 is activated, the ambient lighting tion 6 issued and the ambient light function 6, the normal light function 11 is issued.
  • a light-emitting diode 6 is activated, the light of which is directed into the light guide 12, which serves as a diffuser 12 in the normal light function 2.
  • This light is coupled into the light guide from below into the light guide at the coupling point a.
  • the coupling can also take place from the side or from above. This depends on the direction in which the coupling point a is formed.
  • This light is guided in the light guide 12 from its entry point a to the other end of the light guide n. However, there are also a plurality of coupling points a to n for the light.
  • the light can then be introduced into the light guide at a, b and / or n.
  • a mirroring can also be arranged at the coupling point n, so that the light is directed back to the entry point a.
  • the defect 9 can be arranged on the surface of the light guide 12 and can have a regular or irregular roughness, microprisms, grooves and / or a coating or similar coating which deviates from a smooth surface and on which a total reflection of the light guided in the light guide 6 does not or occurs only to a limited extent.
  • the fault point 9 is preferably arranged in the interior of the light guide 12 and is formed, for example, by scattering bodies, microparticles located there or by points at which the light guide resistance is increased compared to an area adjacent to it.
  • the at least one fault location 9 thus represents a control element which enables the developer to adapt the light distribution on the light coupling surface of the light guide 12 to a light distribution desired for the respective lighting task by appropriately arranging and / or designing the fault locations 9. to fit.
  • the defects 9 it is possible, in particular, for the defects 9 to be arranged and / or designed in such a way that the light coupling surface of the light guide 12 is adapted to a light distribution desired for the respective lighting task.
  • the defects 8 are arranged and / or configured in such a way that a uniform light emission or light intensity distribution for the human eye is achieved on the light coupling surface of the light guide 12.
  • the light scattered from the interference points 8 into the interior light 2 is scattered back by the reflector 7 to the light guide 12 and from there it reaches the interior of the vehicle in analogy to the normal light function 2.
  • This reflector 7 brings about a greater light yield of the ambient light function 4 due to the back reflection of the light.
  • the light guide 12 is preferably made of transparent plastic, so that it is flexible and allows the light emitted in the normal lighting function 2 to pass directly into the interior.
  • the inside of the lens 12 is corrugated for the uniform scattering of the light into the vehicle interior.
  • the lens 12 can be adapted to any surface, so that there are no limits to the design in terms of arrangement and configuration.
  • the defects 8 can also take over the function of the defects 9 if a light guide is used which has the property of coupling out the light at these defects 8 from the light guide.
  • the interior light 2 with a normal lighting function 2 and an ambient lighting function 4 for ambient lighting of the interior can also be realized using OLED technology.
  • OLEDs are transparent plastic disks that emit light when a voltage is applied. It is then an incandescent lamp 11 for the normal lighting function 2 provided that shines through a disc arranged as a diffuser 12 and the disc 12 for the ambient lighting function lights up by applying a voltage.
  • a reading light 5 can be arranged under the light guide 6 designed as a diffuser 12 in addition to the normal interior light 2.
  • This reading light 5 then has its own illuminant 11a.
  • the reading lamp 5 assigned part of the lens 12 other scattering.
  • Impurities 10 as part of the normal interior light 2, so that the light from the reading light source 11a is more directionally scattered into the vehicle interior due to the impurities 10 of the lens 12 in accordance with a good reading light.
  • the interference points 8, 9 are designed in such a way that the light outcoupling points, which are preferably connected to one another to form a continuous light decoupling surface, have essentially the same light intensity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

The invention relates to an interior lamp, especially for a vehicle, said interior lamp having a normal light function and an ambient light function for providing ambient lighting in the interior of said vehicle. According to the invention, a light bulb is provided for the normal light function, said light bulb irradiating through a light guide arranged as a diffusing panel.

Description

Innenraumleuchte, insbesondere für ein Fahrzeug Interior light, in particular for a vehicle
Die Erfindung betrifft eine Innenraumleuchte gemäss den gattungsbildenden Merkmalen des Anspruchs 1.The invention relates to an interior light according to the generic features of claim 1.
Eine gattungsgemässe Innenraumleuchte ist beispielsweise aus der E-Klasse von Mercedes-Benz bekannt. In der Dachbedieneinheit ist eine Innenraumleuchte angeordnet, die als normale Leuchtfunktion eine Glühbirne aufweist, deren Licht durch eine gewöhnliche Streuscheibe in den Fahrzeuginnenraum gestreut wird. Als zusätzliche Leuchte ist eine ambiente Leuchte als zweite Leuchte vorgesehen, die aus einem gekrümmten Lichtleiter besteht, in welchen das Licht einer Leuchtdiode seitlich eingeleitet wird. Dieses Licht wird durch den Lichtleiter geleitet und tritt an den Störstellen als ambientes Licht über die gesamte Fläche des Lichtleiters nach aussen. Die DE 100 32 927 AI und DE 101 49 044 AI offenbaren eine Beleuchtungseinrichtung zur Beleuchtung des Innenraumes eines Kraftfahrzeuges. Die Beleuchtungseinrichtung weist mindestens ein Leuchtmittel und zumindest einen mit seiner Lichteinkoppelfläche im Lichtabstrahlbereich des Leuchtmittels angeordneten platten- oder stabförmigen Lichtleiter auf. Der Lichtleiter hat mehrere von der Lichteinkoppelflache beabstandete Lichtauskoppelstellen. In wenigstens einem von der Lichteinkoppelfläche zu einer der Lichtauskoppelstellen verlaufenden Strahlengang hat der Lichtleiter zumindest eine von der Lichtauskoppelstelle beabstandete, eine Blende bildende Reduzierungsstelle, die so angeordnet und/oder ausgebildet ist, dass die LichtIntensität des an den einzelnen Lichtauskoppel- stellen austretenden Lichts unterschiedlich abgeschwächt ist. Die Reduzierungsstelle ist zumindest an der Lichtauskoppel- seite des Lichtleiters mit einer lichtundurchlässigen Abdeckung versehen.A generic interior light is known for example from the E-Class from Mercedes-Benz. An interior light is arranged in the roof control unit, which has a light bulb as a normal lighting function, the light of which is scattered into the vehicle interior through a conventional diffusing screen. As an additional luminaire, an ambient luminaire is provided as a second luminaire, which consists of a curved light guide into which the light from a light-emitting diode is introduced laterally. This light is guided through the light guide and emerges as ambient light at the fault points over the entire surface of the light guide. DE 100 32 927 AI and DE 101 49 044 AI disclose a lighting device for illuminating the interior of a motor vehicle. The lighting device has at least one lamp and at least one plate-shaped or rod-shaped light guide arranged with its light coupling surface in the light-emitting region of the lamp. The light guide has a plurality of light coupling points spaced apart from the light coupling surface. In at least one beam path running from the light coupling-in area to one of the light coupling-out points, the light guide has at least one reducing point which forms a diaphragm and is arranged and / or designed such that the light intensity of the light emerging at the individual light coupling-out points is attenuated differently is. The reducing point is provided with an opaque cover at least on the light coupling-out side of the light guide.
Nachteilig ist, dass die beiden Leuchten im Dachbedienteil viel Bauraum benötigen. Einerseits die normale Innenraumbeleuchtung und dann noch die rechts und links im Dachbedienteil angeordnete ambiente Beleuchtung, die als Lichtkranz die Dachbedieneinheit umgibt .The disadvantage is that the two lights in the roof control panel require a lot of installation space. On the one hand, the normal interior lighting and then the ambient lighting on the right and left in the roof control panel, which surrounds the roof control unit as a light ring.
Die Aufgabe der Erfindung ist es daher eine Innenraumleuchte, die verschiedene Leuchtfunktionen vereinigt auf geringem Bauraum anzuordnen.The object of the invention is therefore to arrange an interior lamp that combines various lighting functions in a small space.
Dabei zeigen:Show:
Fig. 1 ein Dachbedienteil mit Innenraumbeleuchtung,1 is a roof control panel with interior lighting,
Fig. 2 eine schematische Schnittdarstellung einer Innenraumleuchte mit normaler und ambienter Lichtfunktion.Fig. 2 is a schematic sectional view of an interior lamp with normal and ambient light function.
Fig. 3 eine schematische Schnittdarstellung einer Innenraumleuchte mit normaler Lichtfunktion mit integrierter Leseleuchte und ambienter Lichtfunktion.Fig. 3 is a schematic sectional view of an interior light with normal light function with an integrated reading light and ambient light function.
Fig. 1 zeigt ein Dachbedienteil 1, das einen Bereich mit Bedienelementen 3 zur Bedienung der Innenraumbeleuchtung und eine Innenraumleuchte 2 aufweist. Diese Innenraumleuchte 2 weist eine normale und eine ambiente Lichtfunktion auf. Die normale Lichtfunktion weist als normale Innenraumbeleuchtung 2 eine Streuscheibe 12 als Abdeckung auf, die das Licht der unterhalb der Streuscheibe 12 angeordneten Glühbirne 11 nach aussen streut . Die Streuscheibe 12 ist ein Lichtleiter 4. In diesen Lichtleiter 4 wird von einer Leuchtdiode 6 Licht seitlich eingekoppelt, das sich entlang des Lichtleiters 6 ausbreitet und an dafür vorgesehenen Störstellen 9 im Lichtleiter 6 als ambientes Licht ausgekoppelt wird. Die Oberflächen- strukturierung kann beispielsweise eine von einer glatten O- berfläche abweichende regelmäßige oder unregelmäßige Rauhigkeit, Mikroprismen, Rillen, eine Lackierung oder dergleichen optische Störung aufweisen, an der eine Totalreflexion des in dem Lichtleiter 6 geführten Lichts nicht oder nur in begrenztem Maße auftritt und das Licht somit aus dem Lichtleiter 6 auskoppelt. Die ambiente Lichtfunktion 6 ist nur aktiv, wenn die normale Lichtfunktion 11 ausgeschaltet ist. Die normale Lichtfunktion 11 ist nur bei ausgeschalteter ambienter Lichtfunktion 6 aktiv. Das Einschalten der verschiedenen Licht- funktionen 6,11 ist mittels eines dafür vorgesehenen Bedienelementes möglich. Es kann aber auch eine automatische Einschaltung erfolgen, beispielweise bei Öffnen der Türe wird tagsüber die normale Innenraumbeleuchtung 2 angeschaltet, während die ambiente Leuchtfunktion 4 über einen Licht- oder Regensensor oder beim Einschalten des Fahrlichts aktiviert wird.1 shows a roof control part 1 which has an area with control elements 3 for operating the interior lighting and an interior light 2. This interior light 2 has a normal and an ambient light function. The normal light function has, as normal interior lighting 2, a diffusing screen 12 as a cover which scatters the light from the light bulb 11 arranged below the diffusing screen 12 to the outside. The diffusing screen 12 is a light guide 4. Light 6 is laterally coupled into this light guide 4 by a light-emitting diode 6, which propagates along the light guide 6 and is coupled out as ambient light at the provided defects 9 in the light guide 6. The surface Structuring can, for example, have a regular or irregular roughness, microprisms, grooves, a varnish or the like, which differs from a smooth surface, at which a total reflection of the light guided in the light guide 6 does not occur or only occurs to a limited extent and thus the light decouples from the light guide 6. The ambient light function 6 is only active when the normal light function 11 is switched off. The normal light function 11 is only active when the ambient light function 6 is switched off. The various light functions 6, 11 can be switched on by means of a control element provided for this purpose. However, it can also be switched on automatically, for example when the door is opened, the normal interior lighting 2 is switched on during the day, while the ambient lighting function 4 is activated via a light or rain sensor or when the driving lights are switched on.
Fig. 2 zeigt eine schematische Schnittdarstellung einer Innenraumleuchte 2 mit einer normalen 2 und einer ambienten Lichtfunktion 4. Die normale Lichtfunktion 2 wird durch eine Glühlampe 11 gebildet, deren Licht von einem Reflektor 7 in Richtung Streuscheibe 12 gerichtet wird. An der Innenseite dieser Streuscheibe 12 sind Streustellen 8 angeordnet, die das Licht in den Innenraum in alle Richtungen streuen. Diese Streustellen 8 werden gewöhnlich an der Innenseite der Streuscheibe 12 angeordnet, damit die Innenraumleuchte 2 wie vom Design gewünscht eine glatte Oberfläche aufweist. Technisch können die Streustellen 8 sich aber auch an der Oberfläche der Streuscheibe 12 befinden und das Licht erst nach Licht- durchtritt durch die Streuscheibe 12 in den Innenraum des Fahrzeuges streuen. Die normale 2 und die ambiente Lichtfunktion 4 werden unabhängig voneinander eingeschaltet. Bei aktivierter normaler Lichtfunktion 11 ist die ambiente Beleuch- tung 6 ausgestellt und bei ambienter Lichtfunktion 6 ist die normale Lichtfunktion 11 ausgestellt. Für die ambiente Lichtfunktion 4 wird eine Leuchtdiode 6 aktiviert, deren Licht in den Lichtleiter 12, der bei der normalen Lichtfunktion 2 als Streuscheibe 12 dient, geleitet. Diese Licht wird von unten in den Lichtleiter an der Einkoppelstelle a in den Lichtleiter eingekoppelt. Die Einkoppelung kann aber auch seitlich oder von oben erfolgen. Dies hängt davon ab, in welche Richtung die Einkoppelstelle a ausgebildet ist. Dieses Licht wird im Lichtleiter 12 von seiner Eintrittsstelle a bis zum anderen Ende des Lichtleiters n geleitet . Es sind aber auch mehrere Einkoppelstellen a bis n für das Licht angeordnet. Das Licht kann dann an a, b und/oder n in den Lichtleiter eingeleitet werden. Es kann an der Einkoppelstelle n auch eine Verspiegelung angeordnet sein, so dass das Licht wieder zurückgeleitet wird zur Eintrittsstelle a. Während das Licht den Lichtleiter 6 durchläuft, wird es an im Lichtleiter 12 vorhandenen Streustellen 9 in den Innenraum gestreut. Die Störstelle 9 kann an der Oberfläche des Lichtleiters 12 angeordnet sein und eine von einer glatten Oberfläche abweichende regelmäßige oder unregelmäßige Rauhigkeit, Mikroprismen, Rillen und/oder eine Lackierung oder dergleichen Beschichtung aufweisen, an der eine Totalreflexion des in dem Lichtleiter 6 geführten Lichts nicht oder nur in begrenztem Maße auftritt. Die Störstelle 9 ist aber bevorzugt im Innern des Lichtleiters 12 angeordnet und beispielsweise durch dort befindliche Streukörper, Mikropartikel oder durch Stellen gebildet sein, an denen der Lichtleitwiderstand im Vergleich zu einem dazu benachbarten Bereich erhöht ist. Die wenigstens eine Störstelle 9 stellt also ein Steuerelement dar, das es dem Entwickler ermöglicht, durch entsprechende Anordnung und/oder Ausbildung der Störstellen 9 die Lichtverteilung an der Lichtauskoppelfläche des Lichtleiters 12 an eine für die jeweilige Beleuchtungsaufgabe gewünschte Lichtverteilung an- zupassen. Dabei ist es insbesondere möglich, dass die Störstellen 9 so angeordnet und/oder ausgebildet werden, dass an der Lichtauskoppelfläche des Lichtleiters 12 an eine für die jeweilige Beleuchtungsaufgabe gewünschte Lichtverteilung anzupassen. Dabei ist es insbesondere möglich, dass die Störstellen 8 so angeordnet und/oder ausgebildet werden, dass an der Lichtauskoppelflache des Lichtleiters 12 eine für das menschliche Auge gleichmässige Lichtabgabe bzw. Lichtintensitätsverteilung erreicht wird. Das von den Störstellen 8 in die Innenraumleuchte 2 gestreute Licht wird von dem Reflektor 7 zurück zum Lichtleiter 12 gestreut und gelangt von dort a- nalog der normalen Lichtfunktion 2 in den Innenraum des Fahrzeugs. Dieser Reflektor 7 bewirkt durch die Rückreflexion des Lichts eine grössere Lichtausbeute der ambienten Lichtfunktion 4. Der Lichtleiter 12 besteht bevorzugt aus durchsichtigem Kunststoff, so dass er flexibel ist und das bei der normalen Leuchtfunktion 2 abgegebene Licht direkt in den Innenraum durchlässt. Zur gleichmassigen Streuung des Lichts in den Fahrzeuginnenraum ist die Innenseite der Streuscheibe 12 geriffelt. Diese Riffelungen bilden dann die Streustellen 8 zur Streuung des Lichts in den Fahrzeuginnenraum. Durch die Flexibilität des Lichtleiters 4 ist die Streuscheibe 12 an jede beliebige Oberfläche anpassbar, so dass dem Design bezüglich der Anordnung und Ausgestaltung keine Grenzen gesetzt sind. So können auch die Störstellen 8 die Funktion der Stδrstellen 9 übernehmen, wenn ein Lichtleiter eingesetzt wird, der diese Eigenschaft, das Licht an diesen Störstellen 8 aus dem Lichtleiter auszukoppeln, besitzt.2 shows a schematic sectional illustration of an interior light 2 with a normal 2 and an ambient light function 4. The normal light function 2 is formed by an incandescent lamp 11, the light of which is directed by a reflector 7 in the direction of the lens 12. Scattering points 8 are arranged on the inside of this lens 12, which scatter the light into the interior in all directions. These scattering points 8 are usually arranged on the inside of the lens 12 so that the interior lamp 2 has a smooth surface as desired by the design. Technically, however, the scattering points 8 can also be located on the surface of the scattering disc 12 and only scatter the light into the interior of the vehicle after the light has passed through the scattering disc 12. The normal 2 and the ambient light function 4 are switched on independently of each other. When the normal light function 11 is activated, the ambient lighting tion 6 issued and the ambient light function 6, the normal light function 11 is issued. For the ambient light function 4, a light-emitting diode 6 is activated, the light of which is directed into the light guide 12, which serves as a diffuser 12 in the normal light function 2. This light is coupled into the light guide from below into the light guide at the coupling point a. The coupling can also take place from the side or from above. This depends on the direction in which the coupling point a is formed. This light is guided in the light guide 12 from its entry point a to the other end of the light guide n. However, there are also a plurality of coupling points a to n for the light. The light can then be introduced into the light guide at a, b and / or n. A mirroring can also be arranged at the coupling point n, so that the light is directed back to the entry point a. As the light passes through the light guide 6, it is scattered into the interior at scattering points 9 present in the light guide 12. The defect 9 can be arranged on the surface of the light guide 12 and can have a regular or irregular roughness, microprisms, grooves and / or a coating or similar coating which deviates from a smooth surface and on which a total reflection of the light guided in the light guide 6 does not or occurs only to a limited extent. However, the fault point 9 is preferably arranged in the interior of the light guide 12 and is formed, for example, by scattering bodies, microparticles located there or by points at which the light guide resistance is increased compared to an area adjacent to it. The at least one fault location 9 thus represents a control element which enables the developer to adapt the light distribution on the light coupling surface of the light guide 12 to a light distribution desired for the respective lighting task by appropriately arranging and / or designing the fault locations 9. to fit. In this case, it is possible, in particular, for the defects 9 to be arranged and / or designed in such a way that the light coupling surface of the light guide 12 is adapted to a light distribution desired for the respective lighting task. It is in particular possible that the defects 8 are arranged and / or configured in such a way that a uniform light emission or light intensity distribution for the human eye is achieved on the light coupling surface of the light guide 12. The light scattered from the interference points 8 into the interior light 2 is scattered back by the reflector 7 to the light guide 12 and from there it reaches the interior of the vehicle in analogy to the normal light function 2. This reflector 7 brings about a greater light yield of the ambient light function 4 due to the back reflection of the light. The light guide 12 is preferably made of transparent plastic, so that it is flexible and allows the light emitted in the normal lighting function 2 to pass directly into the interior. The inside of the lens 12 is corrugated for the uniform scattering of the light into the vehicle interior. These corrugations then form the scattering points 8 for scattering the light into the vehicle interior. Due to the flexibility of the light guide 4, the lens 12 can be adapted to any surface, so that there are no limits to the design in terms of arrangement and configuration. Thus, the defects 8 can also take over the function of the defects 9 if a light guide is used which has the property of coupling out the light at these defects 8 from the light guide.
Die Innenraumleuchte 2 mit einer normalen Leuchtfunktion 2 und einer ambienten Leuchtfunktion 4 zur ambienten Beleuchtung des Innenraumes kann auch mittels OLED-Technik realisiert werden. OLED' s sind transparente KunststoffScheiben, die bei Anlegen einer Spannung selbst Licht emittieren. Es ist dann für die normale Leuchtfunktion 2 eine Glühlampe 11 vorgesehen, die durch eine als Streuscheibe 12 angeordnete Scheibe hindurchstrahlt und die Scheibe 12 für die ambiente Leuchtfunktion durch Anlegen einer Spannung selbst leuchtet .The interior light 2 with a normal lighting function 2 and an ambient lighting function 4 for ambient lighting of the interior can also be realized using OLED technology. OLEDs are transparent plastic disks that emit light when a voltage is applied. It is then an incandescent lamp 11 for the normal lighting function 2 provided that shines through a disc arranged as a diffuser 12 and the disc 12 for the ambient lighting function lights up by applying a voltage.
In Fig.3 ist unter dem als Streuscheibe 12 ausgebildeten Lichtleiter 6 zusätzlich zur normalen Innenraumleuchte 2 eine Leseleuchte 5 angeordnet sein. Diese Leseleuchte 5 weist dann ein eigenes Leuchtmittel 11a auf. Alternativ weist der Leseleuchte 5 zugeordnete Teil der Streuscheibe 12 andere Streubzw. Störstellen 10 als der normalen Innenraumleuchte 2 zugeordnete Teil auf, so dass das Licht der Leseleuchtquelle 11a aufgrund der Störstellen 10 der Streuscheibe 12 gerichteter entsprechend eines guten Leselichtes in den Fahrzeuginnenraum gestreut wird. Die Störstellen 8,9 sind derart ausgebildet, dass die vorzugsweise zu einer durchgehenden Lichtauskoppel- fläche miteinander verbundenen Lichtauskoppelstellen im wesentlichen gleiche Lichtintensität aufweisen. In Figure 3, a reading light 5 can be arranged under the light guide 6 designed as a diffuser 12 in addition to the normal interior light 2. This reading light 5 then has its own illuminant 11a. Alternatively, the reading lamp 5 assigned part of the lens 12 other scattering. Impurities 10 as part of the normal interior light 2, so that the light from the reading light source 11a is more directionally scattered into the vehicle interior due to the impurities 10 of the lens 12 in accordance with a good reading light. The interference points 8, 9 are designed in such a way that the light outcoupling points, which are preferably connected to one another to form a continuous light decoupling surface, have essentially the same light intensity.

Claims

Patentansprüche claims
Innenraumleuchte (2) , insbesondere für ein Fahrzeug, die eine normale Leuchtfunktion (2) und eine ambiente Leucht- funktion (4) zur ambienten Beleuchtung des Innenraumes aufweist, d a d u r c h g e k e n n z e i c h n e t , dass für die normale Leuchtfunktion (2) eine GlühlampeInterior light (2), in particular for a vehicle, which has a normal light function (2) and an ambient light function (4) for ambient lighting of the interior, so that a light bulb for the normal light function (2)
(11) vorgesehen ist, die durch einen als Streuscheibe(11) is provided by a as a diffuser
(12) angeordneten Lichtleiter hindurchstrahlt.(12) arranged light guide shines through.
Innenraumleuchte (2) nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass für die ambiente Beleuchtung (4) mindestens eine Leuchtdiode (10) vorgesehen ist, deren Licht in den Lichtleiter (12) eingekoppelt wird und an seinen Störstellen (9) ausgekoppelt wird.Interior light (2) according to claim 1, so that at least one light-emitting diode (10) is provided for the ambient lighting (4), the light of which is coupled into the light guide (12) and is coupled out at its defects (9).
Innenraumleuchte (2) nach den Ansprüchen 1 und 2, d a d u r c h g e k e n n z e i c h n e t , dass unter dem als Streuscheibe (12) ausgebildeten Lichtleiter zusätzlich zur normalen Leuchtfunktion (2) ein weiteres Leuchtmittel (11a) als Leseleuchte (5) angeordnet ist. Interior light (2) according to claims 1 and 2, characterized in that under the light guide designed as a diffuser (12) in addition to the normal lighting function (2) a further illuminant (11a) is arranged as a reading light (5).
4. Innenraumleuchte (2) nach den Ansprüchen 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , dass die Streuscheibe (12) , die dem Leuchtmittel (11) zugeordnet ist die Streustellen (8) aufweist und die dem weiteren Leuchtmittel (11a) zugeordnet ist, andere Streustellen (8a) aufweist.4. Interior light (2) according to claims 1 to 3, characterized in that the diffusing screen (12) which is assigned to the illuminant (11) has the scattering points (8) and which is assigned to the further illuminant (11a), other scattering points ( 8a).
5. Innenraumleuchte nach den Ansprüchen 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass ein Reflektor (7) so angeordnet ist, dass das Licht, das von den Störstellen (8,9) in die Innenraumleuchte gestreut wird zurück zum Lichtleiter (12) reflektiert wird, so dass es analog der normalen Lichtfunktion in den Fahrzeuginnenraum gelangt .5. Interior light according to claims 1 to 4, characterized in that a reflector (7) is arranged so that the light which is scattered from the defects (8,9) in the interior light is reflected back to the light guide (12), so that it gets into the vehicle interior analogous to the normal light function.
6. Innenraumleuchte nach den Ansprüchen 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , dass die Störstellen (8,9) derart ausgebildet sind, dass die vorzugsweise zu einer durchgehenden Lichtauskoppel- fläche miteinander verbundenen Lichtauskoppelstellen im wesentlichen gleiche Lichtintensität aufweisen.6. Interior light according to claims 1 to 5, so that the fault locations (8, 9) are designed such that the light output locations, which are preferably connected to one another to form a continuous light output surface, have essentially the same light intensity.
7. Innenraumleuchte (2) nach einem der vorherigen Ansprüchen 1 d a d u r c h g e k e n n z e i c h n e t , dass die normale (2) und die ambiente Lichtfunktion (4) unabhängig voneinander eingeschaltet werden, wobei bei aktivierter normaler Lichtfunktion (11) die ambiente Beleuchtung (6) ausgestellt ist und bei ambienter Licht- funktion (6) die normale Lichtfunktion (11) ausgestellt ist . Innenraumleuchte (2) , insbesondere für ein Fahrzeug, die eine normale Leuchtfunktion (2) und eine ambiente Leucht- funktion (4) zur ambienten Beleuchtung des Innenraumes aufweist, d a d u r c h g e k e n n z e i c h n e t , dass für die normale Leuchtfunktion (2) eine Glühlampe (11) vorgesehen ist, die durch eine als Streuscheibe (12) angeordnete Scheibe hindurchstrahlt und die Scheibe (12) für die ambiente Leuchtfunktion durch Anlegen einer Spannung selbstleuchtet. 7. Interior light (2) according to one of the preceding claims 1, characterized in that the normal (2) and the ambient light function (4) are switched on independently of one another, the ambient lighting (6) being issued and activated when the normal light function (11) is activated ambient light function (6) the normal light function (11) is issued. Interior light (2), in particular for a vehicle, which has a normal lighting function (2) and an ambient lighting function (4) for ambient lighting of the interior, characterized in that an incandescent lamp (11) is provided for the normal lighting function (2) , which shines through a disc arranged as a diffuser (12) and the disc (12) for the ambient lighting function self-illuminates by applying a voltage.
PCT/EP2004/007499 2003-07-15 2004-07-08 Interior lamp, especially for a vehicle WO2005007450A1 (en)

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US10/534,693 US20060215414A1 (en) 2003-07-15 2004-07-08 Interior lamp, especially for a vehicle
JP2005518217A JP2006510547A (en) 2003-07-15 2004-07-08 Interior lights, especially vehicle interior lights
EP04740802A EP1578643A1 (en) 2003-07-15 2004-07-08 Interior lamp, especially for a vehicle

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DE10332158.6 2003-07-15
DE10332158A DE10332158A1 (en) 2003-07-15 2003-07-15 Interior light for vehicle, has a light bulb for normal lighting function, with light shining through a light conductor which is formed as dispersing plate

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EP1578643A1 (en) 2005-09-28

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