EP2159479B1 - Unité de lampe de véhicule - Google Patents

Unité de lampe de véhicule Download PDF

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Publication number
EP2159479B1
EP2159479B1 EP09010831.7A EP09010831A EP2159479B1 EP 2159479 B1 EP2159479 B1 EP 2159479B1 EP 09010831 A EP09010831 A EP 09010831A EP 2159479 B1 EP2159479 B1 EP 2159479B1
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EP
European Patent Office
Prior art keywords
light emitting
semiconductor light
optical axis
lamp unit
reflection surface
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP09010831.7A
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German (de)
English (en)
Other versions
EP2159479A3 (fr
EP2159479A2 (fr
Inventor
Masashi Tatsukawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
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Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
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Publication of EP2159479A3 publication Critical patent/EP2159479A3/fr
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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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
    • 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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • 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
    • 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
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • 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
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves
    • 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
    • F21W2102/30—Fog lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present disclosure relates to a vehicle lamp unit which uses a semiconductor light emitting element as a light source.
  • a vehicle lamp unit using a semiconductor light emitting element such as a light emitting diode as a light source has been widely used.
  • the light-source light flux of the semiconductor light emitting element is very small compared with a discharge bulb, a halogen bulb, or the like. Accordingly, a vehicle illumination lamp having a plurality of lamp units has been proposed and described in JP-A-2005-317226 .
  • the related art vehicle illumination lamp described in JP-A-2005-317226 includes a projection lens which is disposed on an optical axis extending in a lamp longitudinal direction and a plurality of light source units which are disposed behind a rear focal point of the projection lens with a predetermined gap therebetween in a substantially transverse direction.
  • Each light source unit includes a light emitting element which is disposed on a reference axis extending in a direction tilted toward the optical axis in a forward direction of the lamp, and a reflector which reflects light emitted from the light emitting element in a forward direction toward the reference axis in at least a perpendicular plane.
  • the vehicle lamp unit having the above-described configuration since the light reflected by the reflection surface of the center reflector and the light reflected by the reflection surface of the side reflector are allowed to be irradiated in the forward direction via the projection lens, it is possible to efficiently allow the light emitted from the first semiconductor light emitting element and the light emitted from the plurality of second semiconductor light emitting elements to be incident to the projection lens, and thus to ensure sufficient irradiation light intensity.
  • the light reflected by the reflection surface of the center reflector is irradiated to a light collecting region
  • the light reflected by a diffusion reflection region of the reflection surface of the side reflector is irradiated to a diffusion region.
  • the light reflected by a connection reflection region of the reflection surface of the side reflector is irradiated to a connection region between the light collecting region and the diffusion region such that the regions do not overlap with each other.
  • the first and second semiconductor light emitting elements may be controlled to be individually turned on or off.
  • the vehicle lamp unit having the above-described configuration, when the first semiconductor light emitting element and the plurality of second semiconductor light emitting elements are selectively turned on or off or each light intensity is adjusted, it is possible to form, for example, an AFS (Adaptive Front Lighting System) which changes a light distribution pattern in accordance with a steering rudder angle or a vehicle speed upon driving the vehicle on a curve road without rotatably driving the entire part of the lamp unit.
  • AFS Adaptive Front Lighting System
  • the pair of second semiconductor light emitting elements may be disposed on the pair of reference axes extending in a direction tilted by about 15 to about 35° toward the optical axis.
  • the vehicle lamp unit having the above-described configuration it is possible to form a compact vehicle lamp unit capable of making the illumination in the light distribution pattern uniform.
  • a shade may be disposed between the projection lens and the first and second semiconductor light emitting elements so as to shield a part of light reflected by the center reflector and the side reflector so as to form a cutoff line of a light distribution pattern.
  • the vehicle lamp unit having the above-described configuration for example, it is possible to form a light distribution pattern having a cutoff line such as a low-beam light distribution pattern of a head lamp.
  • auxiliary reflection surface that is formed so as to extend backward in the optical axis direction from a light shielding edge of the shade, and a part of light reflected by the reflection surface is reflected upward by the auxiliary reflection surface. According to this configuration, it is possible to efficiently use the light to be shielded by the shade as irradiation light, and thus to improve the light flux availability of the light emitted from the semiconductor light emitting elements.
  • Fig. 1 is a longitudinal sectional view showing a vehicle lamp provided with a vehicle lamp unit according to an exemplary embodiment of the invention.
  • Fig. 2 is a longitudinal sectional view showing a configuration of the vehicle lamp unit shown in Fig. 1 .
  • Fig. 3 is a bottom view showing a reflector shown in Fig. 2 .
  • Figs. 4 to 6 are horizontal cross-sectional views illustrating a configuration of the vehicle lamp unit shown in Fig. 1 .
  • a vehicle lamp unit 100 is, for example, a low-beam head lamp, and has a structure in which a lamp unit (vehicle lamp unit) 20 is accommodated in a lamp chamber formed by a lamp body 13 and a transparent light transmitting cover 11.
  • the lamp unit 20 which forms a low-beam light distribution pattern is disposed such that an optical axis Ax thereof extends in a vehicle longitudinal direction. Specifically, the optical axis Ax of the lamp unit 20 extends in a direction tilted downward by about 0.5 to about 0.6° with respect to a horizontal direction.
  • the lamp unit 20 is formed as, for example, a projector-type lamp unit.
  • the lamp unit 20 includes a projection lens 35 which is disposed on the optical axis Ax; a Light Emitting Diode (LED) 25 which is a first semiconductor light emitting element disposed on the optical axis Ax behind a rear focal point F of the projection lens 35; a center reflector 30 which includes a reflection surface 31 used to reflect light emitted from the LED 25 in a forward direction toward the optical axis Ax; a plurality of LEDs (in this exemplary embodiment, two LEDs 26 and 27 are provided) as second semiconductor light emitting elements respectively disposed on left and right reference axes Bx and Cx, respectively, extending in a direction tilted toward the optical axis Ax at both sides of the LED 25 (see Fig.
  • LED Light Emitting Diode
  • a side reflector 40 which includes a reflection surface 41 used to reflect light emitted from the LED 26 in the forward direction toward the reference axis Bx; a side reflector 50 which includes a reflection surface 51 used to reflect light emitted from the LED 27 in the forward direction toward the reference axis Cx; and a shade 29 which is disposed between the projection lens 35 and the LEDs 25, 26, and 27 and shields a part of the light which is reflected by the center reflector 30 and the side reflectors 40 and 50 so as to form a cutoff line of a light distribution pattern.
  • the light distribution pattern may be predetermined.
  • the lamp unit 20 is supported by the lamp body 13 via a frame (not shown), and the frame is supported by the lamp body 13 via an aiming mechanism (not shown).
  • the LEDs 25, 26, and 27 are, for example, white-emitting LEDs in which the light emitting chip has, for example, a rectangular light emitting surface of about 1 x 4 mm, where the LEDs 25, 26, and 27 are disposed behind the rear focal point F of the projection lens 35 and are supported by respective substrates 33 so as to respectively face upward in directions perpendicular to the optical axis Ax and the reference axes Bx and Cx.
  • the center reflector 30 is a substantially dome-shaped member which is provided on the upper side of the LED 25, and includes a reflection surface 31 which collects and reflects the light emitted from the LED 25 in the forward direction toward the optical axis Ax.
  • the reflection surface 31 is formed in a substantially oval spherical surface shape about the optical axis Ax serving as a central axis.
  • the sectional shape including the optical axis Ax is set to a substantially oval shape, and the eccentricity is configured to gradually increase in a direction from a perpendicular section to a horizontal section.
  • the rear focal points of the ovals forming the sections are set to the same position, and the LED 25 is disposed at the first focal point of the oval forming the perpendicular section of the reflection surface 31. Accordingly, as shown in Fig. 4 , the reflection surface 31 collects and reflects the light emitted from the LED 25 in the forward direction toward the optical axis Ax. At this time, in the perpendicular section including the optical axis Ax, the light is allowed to be substantially converged at the second focal point (the rear focal point F of the projection lens 35) of the oval.
  • the side reflector 40 located on the left side of the center reflector 30 is a substantially dome-shaped member which is provided on the upper side of the LED 26, and includes a reflection surface 41 which diffuses and reflects the light emitted from the LED 26 in the forward direction toward the optical axis Bx (see Fig. 5 ).
  • the reflection surface 41 is formed in a substantially oval spherical surface shape about the optical axis Bx serving as a central axis.
  • an inner reflection surface 41a on the side of the optical axis Ax is formed as a connection reflection region having light collecting power smaller than that of the reflection surface 31 of the center reflector 30, and an outer reflection surface 41b on the opposite side of the LED 26 from the optical axis Ax is formed as a diffusion reflection region having light collecting power smaller than that of the connection reflection region.
  • the sectional shape including the reference axis Bx is formed into a substantially oval shape, and the eccentricity is configured to gradually increase more than that of the reflection surface 31 of the center reflector 30 in a direction from the perpendicular section to the horizontal section (see Fig. 5 ).
  • the sectional shape including the reference axis Bx is set to a substantially oval shape, and the eccentricity is configured to gradually increase more than that of the inner reflection surface 41a in a direction from the perpendicular section to the horizontal section (see Fig. 6 ).
  • the side reflector 50 located on the right side of the center reflector 30 is a substantially dome-shaped member which is provided on the upper side of the LED 27, and includes the reflection surface 51 which diffuses and reflects the light emitted from the LED 27 in the forward direction toward the reference axis Cx (see Fig. 4 ).
  • the reflection surface 51 is formed in a substantially oval spherical surface shape about the reference axis Cx serving as a central axis.
  • an inner reflection surface 51 a on the side of the optical axis Ax is formed as a connection reflection region having light collecting power smaller than that of the reflection surface 31 of the center reflector 30, and an outer reflection surface 51b on the opposite side of the LED 27 from the optical axis Ax is formed as a diffusion reflection region having light collecting power smaller than that of the connection reflection region.
  • the sectional shape including the reference axis Cx is set to a substantially oval shape, and the eccentricity is configured to gradually increase more than that of the reflection surface 31 of the center reflector 30 in a direction from the perpendicular section to the horizontal section.
  • the sectional shape including the reference axis Cx is set to a substantially oval shape, and the eccentricity is configured to gradually increase more than that of the inner reflection surface 51a in a direction from the perpendicular section to the horizontal section.
  • center reflector 30 and the side reflectors 40 and 50 are integrally formed with each other, and the respective reflection surfaces 31, 41, and 51 are formed by aluminum deposition or the like.
  • the projection lens 35 is formed as a plane-convex lens of which the front surface is a convex surface and the rear surface is a flat surface. As shown in Fig. 2 , in the projection lens 35, the rear focal point F is disposed on the optical axis Ax so as to be located at the second focal point of the reflection surface 31 of the reflector 30. Accordingly, an image formed on a focal point surface including the rear focal point F is projected in the forward direction as an inverse image.
  • the shade 29 according to the exemplary embodiment is formed in a block (lump) shape so as to be simultaneously used as a holder for the projection lens 35 and the LEDs 25, 26, and 27, and the center reflector 30 and the side reflectors 40 and 50 which are integrally formed with each other are placed thereon.
  • the shade 29 forms a cutoff line of a light distribution pattern in such a manner that a light shielding edge 29c is located near the rear focal point F of the projection lens 35 so as to shield a part of light reflected by the center reflector 30 and the side reflectors 40 and 50.
  • an upper surface 29a extending backward in the direction of the optical axis Ax from the light shielding edge 29c reflects upward a part of light reflected by the center reflector 30 and the side reflectors 40 and 50.
  • the upper surface 29a is provided with an auxiliary reflection surface 36 subjected to a reflection surface process.
  • the shade 29 is formed so that the light shielding edge 29c (i.e., a ridge between the auxiliary reflection surface 36 and a front end surface 29b of the shade 29) passes through the rear focal point F of the projection lens 35.
  • the light shielding edge 29c i.e., a ridge between the auxiliary reflection surface 36 and a front end surface 29b of the shade 29
  • the light shielding edge 29c of the shade 29 is formed in a curved shape, in which both left and right sides thereof protrude forward in a top view (see Fig. 4 ), so as to correspond to the curvature of the image surface of the projection lens 35.
  • the curved light shielding edge 29c aligns with a focal point group of the projection lens 35. That is, the shade 29 has a structure in which the light shielding edge 29c is formed along the focal point group of the projection lens 35, and the shape of the light shielding edge 29c is directly used as the shape of the cutoff line.
  • the lamp unit 20 since the light reflected by the reflection surface 31 of the center reflector 30 and the light reflected by the reflection surfaces 41 and 51 of the side reflectors 40 and 50 are allowed to be irradiated in the forward direction via the projection lens 35, it is possible to efficiently allow the light emitted from one LED 25 and the light emitted from two LEDs 26 and 27 to be incident to the projection lens 35, and thus to ensure sufficient irradiation light intensity.
  • the collected light reflected by the reflection surface 31 of the center reflector 30 is irradiated to a light collecting region in the light distribution pattern.
  • the diffused light reflected by the outer reflection surfaces 41b and 51b corresponding to the diffusion reflection regions of the reflection surfaces 41 and 51 of the side reflectors 40 and 50 is irradiated to a diffusion region.
  • the light reflected by the inner reflection surfaces 41 a and 51a corresponding to the connection reflection regions of the reflection surfaces 41 and 51 of the side reflectors 40 and 50 is irradiated to the connection region between the light collecting region and the diffusion region which cannot overlap with each other.
  • the uniform illumination in the synthesized light distribution pattern formed by the center reflector 30 and the side reflectors 40 and 50 is possible to obtain the uniform illumination in the synthesized light distribution pattern formed by the center reflector 30 and the side reflectors 40 and 50.
  • the lamp unit 20 is controlled to individually turn on or off the LEDs 25, 26, and 27.
  • the LEDs 25, 26, and 27 are selectively turned on or off or each light intensity thereof is adjusted, it is possible to form, for example, an AFS which changes a light distribution pattern to the left or right in accordance with a steering rudder angle or a vehicle speed upon driving the vehicle in a curve road without rotatably driving the entire part of the lamp unit 20.
  • the light intensity of the LED 26 is increased for a right curve road and the light intensity of the LED 27 is increased for a left curve road, it is possible to improve a visualizing performance in a vehicle moving direction. Additionally, when the light intensity of the opposite-side LED is decreased at this time, it is possible to improve the visualizing performance without increasing the entire output of the lamp unit 20.
  • the shade 29 is simultaneously used as the holder for the projection lens 35 and the center reflector 30 and the side reflectors 40 and 50, it is possible to highly precisely set the positional relationship of the projection lens 35, the center reflector 30, the side reflectors 40 and 50, and the shade 29 before assembling the vehicle lamp 100. Accordingly, it is possible to easily assemble the vehicle lamp 100.
  • the LEDs 26 and 27 are respectively disposed on the reference axes Bx and Cx extending in a direction tilted by about 15° to about 35° toward the optical axis Ax, it is possible to obtain a compact lamp unit 20.
  • the vehicle lamp unit is used as the low-beam head lamp, but the vehicle lamp unit can be used as various vehicle lamp units such as a fog lamp or a bending lamp in such a manner that the shade is omitted or a plurality of pairs of side reflectors and a plurality of pairs of semiconductor light emitting elements are used in combination. Even in this case, it is possible to obtain the same advantage as that of the above-described exemplary embodiment.
  • the semiconductor light emitting element as the light source is not limited to the light emitting diode, but an LD (semiconductor laser) or the like may be adopted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (4)

  1. Unité de phare de véhicule (20) comprenant :
    une lentille de projection (35) qui est disposée sur un axe optique (Ax) s'étendant dans une direction longitudinale de véhicule ;
    un premier élément d'émission de lumière à semi-conducteur (25) qui est disposé sur l'axe optique (Ax) derrière un point focal arrière (F) de la lentille de projection ;
    un réflecteur central (30) qui comprend une surface de réflexion (31) qui réfléchit de la lumière émise par le premier élément d'émission de lumière à semi-conducteur (25) dans une direction en avant vers l'axe optique (Ax) ;
    une pluralité de deuxièmes éléments d'émission de lumière à semi-conducteur (26, 27) qui sont disposés, respectivement, sur des axes de référence (Bx, Cx) et derrière le point focal arrière de la lentille de projection, les axes de référence (Bx, Cx) s'étendant chacun dans une direction inclinée par rapport à l'axe optique (Ax) ; et
    une pluralité de réflecteurs latéraux (40, 50), qui correspondent à des respectifs parmi la pluralité de deuxièmes éléments d'émission de lumière à semi-conducteur (26, 27), chacun des réflecteurs latéraux (40, 50) comprenant une surface de réflexion (41, 51) qui réfléchit de la lumière émise par le deuxième élément d'émission de lumière à semi-conducteur (26, 27) correspondant dans la direction en avant vers l'axe de référence (Bx, Cx) correspondant,
    caractérisée en ce que
    des réflecteurs latéraux comprennent une surface de réflexion intérieure (41a, 51a) qui est disposée sur un côté de l'axe de référence (Bx, Cx) correspondant le plus proche de l'axe optique (Ax) et qui est formée en tant que région de réflexion de connexion ayant une forme sectionnelle réalisée en une forme ovale, son excentricité augmentant graduellement davantage que celle de la surface de réflexion du réflecteur central (30) dans une direction depuis une section perpendiculaire jusqu'à une section horizontale, et
    une surface de réflexion extérieure (41b, 51b) qui est disposée sur un côté de l'axe de référence (Bx, Cx) correspondant opposé à l'axe optique (Ax) et qui est formée en tant qu'une région de réflexion de diffusion ayant une forme sectionnelle réalisée en une forme ovale, son excentricité augmentant graduellement davantage que celle de la région de réflexion de connexion dans une direction depuis une section perpendiculaire jusqu'à une section horizontale.
  2. Unité de phare de véhicule (20) selon la revendication 1,
    dans laquelle chacun parmi le premier élément d'émission de lumière à semi-conducteur (25) et la pluralité de deuxièmes éléments d'émission de lumière à semi-conducteur (26, 27) est commandé pour être allumé ou éteint individuellement.
  3. Unité de phare de véhicule (20) selon la revendication 1 ou 2,
    dans laquelle deux deuxièmes éléments d'émission de lumière à semi-conducteur (26, 27) sont disposés, respectivement, sur deux axes de référence (Bx, Cx), chacun des deux axes de référence (Bx, Cx) s'étendant dans une direction inclinée de près de 15 à près de 35° par rapport à l'axe optique (Ax).
  4. Unité de phare de véhicule selon l'une quelconque des revendications 1 à 3, comprenant en outre :
    un abat-jour (29) qui est disposé entre la lentille de projection (35) et le premier élément d'émission de lumière à semi-conducteur (25) et la pluralité de deuxièmes éléments d'émission de lumière à semi-conducteur (26, 27), et qui fait écran à une partie de la lumière réfléchie par le réflecteur central (30) et les réflecteurs latéraux (40, 50) de façon à former une ligne de découpage d'un motif de distribution de lumière.
EP09010831.7A 2008-08-27 2009-08-24 Unité de lampe de véhicule Active EP2159479B1 (fr)

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JP2008218478A JP5087500B2 (ja) 2008-08-27 2008-08-27 車両用灯具ユニット

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JP5831788B2 (ja) * 2011-07-01 2015-12-09 スタンレー電気株式会社 車両用灯具ユニット
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CN102330936B (zh) * 2011-10-12 2013-04-17 东莞市鼎聚光电有限公司 一种投射式led汽车近光灯
WO2013068063A1 (fr) 2011-11-11 2013-05-16 Docter Optics Gmbh Projecteur de véhicule automobile
DE112012000572A5 (de) 2011-11-11 2013-11-21 Docter Optics Se Scheinwerferlinse für einen Fahrzeugscheinwerfer
JP5801731B2 (ja) * 2012-01-24 2015-10-28 株式会社小糸製作所 車輌用前照灯
DE102012009596A1 (de) 2012-05-15 2013-11-21 Docter Optics Se Verfahren zum Herstellen einer Scheinwerferlinse
DE102013006707A1 (de) 2012-05-26 2013-11-28 Docter Optics Se Fahrzeugscheinwerfer
JP2014150024A (ja) * 2013-02-04 2014-08-21 Koito Mfg Co Ltd 車輌用灯具
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JP2014212089A (ja) * 2013-04-22 2014-11-13 株式会社小糸製作所 車両用灯具
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TWI577584B (zh) * 2014-02-24 2017-04-11 王正 車燈結構
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TWI535971B (zh) 2015-04-16 2016-06-01 隆達電子股份有限公司 車用燈具
JP6519353B2 (ja) * 2015-06-29 2019-05-29 市光工業株式会社 車両用前照灯
FR3047541B1 (fr) 2015-12-10 2019-10-04 Valeo Vision Module d'eclairage automobile avec fonctions code et route combinees et une source lumineuse ajustable
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KR101916432B1 (ko) * 2017-03-30 2018-11-07 엘지전자 주식회사 차량용 램프 및 차량
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TWI650256B (zh) * 2018-01-29 2019-02-11 誠益光電科技股份有限公司 智慧頭燈
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EP2159479A2 (fr) 2010-03-03

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