JP5087500B2 - Vehicle lamp unit - Google Patents

Vehicle lamp unit Download PDF

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JP5087500B2
JP5087500B2 JP2008218478A JP2008218478A JP5087500B2 JP 5087500 B2 JP5087500 B2 JP 5087500B2 JP 2008218478 A JP2008218478 A JP 2008218478A JP 2008218478 A JP2008218478 A JP 2008218478A JP 5087500 B2 JP5087500 B2 JP 5087500B2
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optical axis
light emitting
lamp unit
light
semiconductor light
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JP2010055888A (en
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正士 達川
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Koito Manufacturing Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/147Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148Light 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/151Light emitting diodes [LED] arranged in one or more lines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/155Surface emitters, e.g. organic light emitting diodes [OLED]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/255Lenses with a front view of circular or truncated circular outline
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/33Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/36Combinations of two or more separate reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/36Combinations of two or more separate reflectors
    • F21S41/365Combinations of two or more separate reflectors successively reflecting the light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43Illuminating 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/321Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • F21W2102/13Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135Arrangement 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • F21W2102/17Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19Arrangement or contour of the emitted light for regions other than high beam or low beam for curves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/30Fog lights
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

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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)

Description

本発明は、半導体発光素子を光源とする車両用灯具ユニットに関する。   The present invention relates to a vehicular lamp unit using a semiconductor light emitting element as a light source.

近年、発光ダイオードなどの半導体発光素子を光源とする車両用灯具ユニットが多く採用されている。ところが、半導体発光素子は、放電バルブやハロゲンバルブ等に比してその光源光束がかなり小さいので、例えば特許文献1に記載されている車両用照明灯具(車両用灯具ユニット)のように、複数の灯具ユニットを備えた構成として十分な照射光量を確保する必要がある。   In recent years, a vehicular lamp unit using a semiconductor light emitting element such as a light emitting diode as a light source has been widely used. However, since the light source light flux of the semiconductor light emitting element is considerably smaller than that of a discharge bulb, a halogen bulb, or the like, a plurality of light sources such as a vehicle illumination lamp (vehicle lamp unit) described in Patent Document 1 are used. It is necessary to secure a sufficient amount of irradiation light as a configuration including the lamp unit.

このような車両用照明灯具では、灯具前後方向に延びる光軸上に配置された投影レンズと、この投影レンズの後側焦点よりも後方側において略左右方向に所定間隔をおいて配置された複数の光源ユニットとを備えており、各光源ユニットが、灯具前方へ向けて光軸寄りに傾斜した方向に延びる基準軸上に配置された発光素子と、この発光素子からの光を前方へ向けて少なくとも鉛直面内において基準軸寄りに反射させるリフレクタとを備えている。
そこで、複数の光源ユニットにおける発光素子からの光を効率良く投影レンズに入射させることができ、十分な照射光量を確保することが可能となる。
In such a vehicular illumination lamp, a projection lens arranged on the optical axis extending in the front-rear direction of the lamp, and a plurality of lamps arranged at a predetermined interval in the left-right direction behind the rear focal point of the projection lens. Each light source unit is arranged on a reference axis extending in a direction inclined near the optical axis toward the front of the lamp, and light from the light emitting element is directed forward And a reflector that reflects near the reference axis in a vertical plane.
Therefore, light from the light emitting elements in the plurality of light source units can be efficiently incident on the projection lens, and a sufficient amount of irradiation light can be secured.

特開2005−317226号公報JP 2005-317226 A

しかしながら、特許文献1等に記載された車両用照明灯具のように、複数の光源ユニットを備えた車両用灯具ユニットの投影レンズから出射された光は、配光パターン内の照度を均一化することが難しいという問題がある。   However, the light emitted from the projection lens of the vehicular lamp unit having a plurality of light source units as in the vehicular illumination lamp described in Patent Document 1 or the like makes the illuminance in the light distribution pattern uniform. There is a problem that is difficult.

例えば、光軸上に配置された集光光源ユニットによって所謂ホットゾーンとなる集光領域を照射し、その両側に左右対称に配置された一対の拡散光源ユニットによって拡散領域を照射するような場合、集光光源ユニットのリフレクタに反射された集光光と、拡散光源ユニットのリフレクタに反射された拡散光とは、投影レンズから出射された際に互いにオーバーラップし難い。その為、集光光源ユニットと拡散光源ユニットとによって形成した合成配光パターン内の照度が、不均一となってしまう。   For example, in the case of irradiating a condensing region that becomes a so-called hot zone by a condensing light source unit arranged on the optical axis, and irradiating the diffusion region by a pair of diffusing light source units arranged symmetrically on both sides thereof, The condensed light reflected by the reflector of the condensing light source unit and the diffused light reflected by the reflector of the diffused light source unit are unlikely to overlap each other when emitted from the projection lens. For this reason, the illuminance in the combined light distribution pattern formed by the condensing light source unit and the diffused light source unit becomes non-uniform.

従って、本発明の目的は上記課題を解消することに係り、半導体発光素子を光源としながら十分な照射光量を確保すると共に、配光パターン内の照度を均一化することができる車両用灯具ユニットを提供することである。   Accordingly, an object of the present invention is to solve the above problems, and to provide a vehicular lamp unit capable of ensuring a sufficient amount of irradiation light while using a semiconductor light emitting element as a light source and making the illuminance in a light distribution pattern uniform. Is to provide.

本発明の上記目的は、車両前後方向に延びる光軸上に配置された投影レンズと、
前記投影レンズの後方側焦点よりも後方において前記光軸上に配置された第1半導体発光素子と、
前記第1半導体発光素子からの光を前方に向けて前記光軸寄りに反射させる反射面を有するセンターリフレクタと、
前記第1半導体発光素子の左右両側において前記光軸寄りに傾斜した方向に延びる左右一対ずつの基準軸上に配置された複数の第2半導体発光素子と、
前記各第2半導体発光素子からの光を前方に向けて前記各基準軸寄りに反射させる反射面を有するサイドリフレクタと、を備え、
前記サイドリフレクタの反射面における前記光軸寄りの内側反射面が、前記センターリフレクタの反射面より集光度が小さいつなぎ反射領域とされ、
前記サイドリフレクタの反射面における前記光軸と反対寄りの外側反射面が、前記つなぎ反射領域より集光度が小さい拡散反射領域とされることを特徴とする車両用灯具ユニットにより達成される。
The above object of the present invention is to provide a projection lens disposed on an optical axis extending in the vehicle longitudinal direction,
A first semiconductor light emitting element disposed on the optical axis behind the rear focal point of the projection lens;
A center reflector having a reflecting surface for reflecting light from the first semiconductor light emitting element forward and toward the optical axis;
A plurality of second semiconductor light emitting elements disposed on a pair of left and right reference axes extending in a direction inclined toward the optical axis on both left and right sides of the first semiconductor light emitting element;
A side reflector having a reflecting surface for reflecting light from each of the second semiconductor light emitting elements forward and toward each reference axis; and
The inner reflection surface near the optical axis in the reflection surface of the side reflector is a connection reflection region having a smaller concentration than the reflection surface of the center reflector,
The vehicle lamp unit is characterized in that an outer reflection surface opposite to the optical axis of the reflection surface of the side reflector is a diffuse reflection region having a light collection degree smaller than that of the connection reflection region.

上記構成の車両用灯具ユニットによれば、投影レンズを介してセンターリフレクタの反射面による反射光とサイドリフレクタの反射面による反射光とを前方へ照射するように構成されているので、第1半導体発光素子と複数の第2半導体発光素子からの光を効率良く投影レンズに入射させることができ、十分な照射光量を確保することができる。   According to the vehicle lamp unit configured as described above, the first semiconductor is configured to irradiate the reflected light from the reflecting surface of the center reflector and the reflected light from the reflecting surface of the side reflector through the projection lens. Light from the light emitting element and the plurality of second semiconductor light emitting elements can be efficiently incident on the projection lens, and a sufficient amount of irradiation light can be secured.

更に、センターリフレクタの反射面により反射された光が集光領域を照射し、サイドリフレクタの反射面における拡散反射領域により反射された光が拡散領域を照射する。そして、サイドリフレクタの反射面におけるつなぎ反射領域により反射された光が、互いにオーバーラップし難い集光領域と拡散領域との間のつなぎ領域を照射する。そこで、センターリフレクタとサイドリフレクタとによって形成した合成配光パターン内の照度を均一化することができる。   Further, the light reflected by the reflection surface of the center reflector irradiates the light collection region, and the light reflected by the diffusion reflection region on the reflection surface of the side reflector irradiates the diffusion region. And the light reflected by the connection reflection area | region in the reflective surface of a side reflector irradiates the connection area | region between the condensing area | region and a diffusion area | region which do not mutually overlap easily. Therefore, the illuminance in the combined light distribution pattern formed by the center reflector and the side reflector can be made uniform.

尚、上記構成の車両用灯具ユニットにおいて、前記第1半導体発光素子及び前記各第2半導体発光素子は、個別に点消灯制御可能であることが望ましい。
この様な構成の車両用灯具ユニットによれば、第1半導体発光素子及び複数の第2半導体発光素子を選択的に点消灯させたり、それぞれ光量を調整したりすることによって、灯具ユニット全体を回転駆動することなく、例えばカーブ走行時にステアリング舵角や車速に応じて配光パターンを変化させるAFS(Adaptive Front Lighting System)を構成することができる。
In the vehicular lamp unit configured as described above, it is desirable that the first semiconductor light emitting element and the second semiconductor light emitting elements can be individually controlled to be turned on and off.
According to the vehicular lamp unit having such a configuration, the entire lamp unit can be rotated by selectively turning on and off the first semiconductor light emitting element and the plurality of second semiconductor light emitting elements and adjusting the respective light amounts. For example, an AFS (Adaptive Front Lighting System) that changes the light distribution pattern according to the steering angle and the vehicle speed when driving a curve can be configured without driving.

また、上記構成の車両用灯具ユニットにおいて、一対の前記第2半導体発光素子が、前記光軸寄りに15度〜35度傾斜した方向に延びる左右一対の基準軸上に配置されることが望ましい。
この様な構成の車両用灯具ユニットによれば、配光パターン内の照度を均一化することができる車両用灯具ユニットをコンパクトに構成することができる。
In the vehicular lamp unit configured as described above, it is desirable that the pair of second semiconductor light emitting elements be disposed on a pair of left and right reference axes extending in a direction inclined by 15 degrees to 35 degrees closer to the optical axis.
According to the vehicular lamp unit having such a configuration, the vehicular lamp unit capable of making the illuminance in the light distribution pattern uniform can be configured in a compact manner.

また、上記構成の車両用灯具ユニットにおいて、前記投影レンズと前記第1及び第2半導体発光素子との間には、前記センターリフレクタ及び前記サイドリフレクタからの反射光の一部を遮蔽することにより配光パターンのカットオフラインを形成するシェードが配置されていることが望ましい。
この様な構成の車両用灯具ユニットによれば、例えばヘッドランプのロービーム配光パターン等のようなカットオフラインを有する配光パターンを形成することができる。
更に、シェードの遮光端縁から光軸方向後方へ向けて延びる付加反射面を形成し、この付加反射面により、反射面からの反射光の一部を上方側へ反射させるようにすれば、シェードによって遮蔽されるべき光を照射光として有効に活用することができ、半導体発光素子からの出射光の光束利用率を高めることができる。
In the vehicular lamp unit having the above-described configuration, a part of the reflected light from the center reflector and the side reflector is shielded between the projection lens and the first and second semiconductor light emitting elements. It is desirable that a shade that forms a cut-off line of the light pattern is disposed.
According to the vehicular lamp unit having such a configuration, it is possible to form a light distribution pattern having a cut-off line such as a low beam light distribution pattern of a headlamp.
Furthermore, if an additional reflection surface extending from the light shielding edge of the shade toward the rear in the optical axis direction is formed, and a part of the reflected light from the reflection surface is reflected upward by this additional reflection surface, the shade is obtained. The light to be shielded by the light can be effectively utilized as the irradiation light, and the luminous flux utilization factor of the light emitted from the semiconductor light emitting element can be increased.

本発明に係る車両用灯具ユニットによれば、半導体発光素子を光源としながら十分な照射光量を確保すると共に、配光パターン内の照度を均一化することができる良好な車両用灯具ユニットを提供できる。   According to the vehicular lamp unit according to the present invention, it is possible to provide a favorable vehicular lamp unit capable of ensuring a sufficient amount of irradiation light while using a semiconductor light emitting element as a light source and making the illuminance in the light distribution pattern uniform. .

以下、添付図面に基づいて本発明に係る車両用灯具ユニットの好適な実施形態を詳細に説明する。
図1は本発明の一実施形態に係る車両用灯具ユニットを備えた車両用灯具の縦断面図であり、図2は図1に示した車両用灯具ユニットの基本構成を説明する縦断面図であり、図3は図2に示したリフレクタの底面図であり、図4〜図6は図1に示した車両用灯具ユニットの基本構成を説明する為の水平断面図である。
Hereinafter, preferred embodiments of a vehicle lamp unit according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view of a vehicular lamp provided with a vehicular lamp unit according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view for explaining a basic configuration of the vehicular lamp unit shown in FIG. 3 is a bottom view of the reflector shown in FIG. 2, and FIGS. 4 to 6 are horizontal sectional views for explaining the basic configuration of the vehicular lamp unit shown in FIG.

本実施形態に係る車両用灯具100は、図1に示すように、ロービーム用のヘッドランプであって、素通し状の透光カバー11とランプボディ13とで形成される灯室内に、灯具ユニット(車両用灯具ユニット)20が、収容された構成となっている。   As shown in FIG. 1, a vehicular lamp 100 according to the present embodiment is a low beam headlamp, and includes a lamp unit (in a lamp chamber formed by a transparent translucent cover 11 and a lamp body 13). The vehicle lamp unit) 20 is housed.

ロービーム用配光パターンを形成する灯具ユニット20は、その光軸Axが車両前後方向に延びるようにして配置されている。この灯具ユニット20の光軸Axは、正確には水平方向に対して0.5〜0.6°程度下向きの方向に延びている。   The lamp unit 20 that forms the low beam light distribution pattern is arranged such that its optical axis Ax extends in the vehicle front-rear direction. The optical axis Ax of the lamp unit 20 extends in the downward direction about 0.5 to 0.6 ° with respect to the horizontal direction.

そして、本実施形態の灯具ユニット20は、図1及び図2に示すように、光軸Ax上に配置された投影レンズ35と、投影レンズ35の後方側焦点Fよりも後方において光軸Ax上に配置された光源としての第1半導体発光素子であるLED(発光ダイオード)25と、LED25からの光を前方に向けて光軸Ax寄りに反射させる反射面31を有するセンターリフレクタ30と、LED25の左右両側において光軸Ax寄りに傾斜した方向に延びる左右一対の基準軸Bx,Cx上にそれぞれ配置された複数(本実施形態では2個)の第2半導体発光素子であるLED26,27と、LED26からの光を前方に向けて基準軸Bx寄りに反射させる反射面41を有するサイドリフレクタ41と、LED27からの光を前方に向けて基準軸Cx寄りに反射させる反射面51を有するサイドリフレクタ50と、投影レンズ35とLED25,26,27との間に配設されてセンターリフレクタ30及びサイドリフレクタ40,50からの反射光の一部を遮蔽することにより所定の配光パターンのカットオフラインを形成するシェード29と、を備えるプロジェクタ型の灯具ユニットとして構成されている。   As shown in FIGS. 1 and 2, the lamp unit 20 of the present embodiment includes a projection lens 35 disposed on the optical axis Ax and the rearward focal point F of the projection lens 35 on the optical axis Ax. An LED (light emitting diode) 25, which is a first semiconductor light emitting element disposed as a light source, a center reflector 30 having a reflecting surface 31 that reflects light from the LED 25 forward and toward the optical axis Ax, A plurality (two in this embodiment) of second semiconductor light emitting elements 26 and 27 disposed on a pair of left and right reference axes Bx and Cx extending in a direction inclined toward the optical axis Ax on both the left and right sides, and the LED 26 Side reflector 41 having a reflection surface 41 that reflects light from the front toward the reference axis Bx, and light from the LED 27 forward to the reference axis Cx A side reflector 50 having a reflecting surface 51 for reflecting the light and a projection lens 35 and the LEDs 25, 26, 27 are disposed between the center reflector 30 and the side reflectors 40, 50 to block part of the reflected light. Thus, the projector 29 is configured as a projector-type lamp unit including a shade 29 that forms a cut-off line of a predetermined light distribution pattern.

そして、灯具ユニット20は、ランプボディ13に不図示のフレームを介して支持されており、このフレームは不図示のエイミング機構を介して、ランプボディ13に支持されている。   The lamp unit 20 is supported by the lamp body 13 via a frame (not shown), and this frame is supported by the lamp body 13 via an aiming mechanism (not shown).

LED25,26,27は、発光チップが例えば1×4mm四方の大きさの長方形の発光面を有する白色発光ダイオードであって、投影レンズ35の後方側焦点Fよりも後方に配置されると共に、基板33に支持された状態で光軸Ax及び基準軸Bx,Cx上においてそれぞれ鉛直方向上方へ向けて配置されている。   The LEDs 25, 26, and 27 are white light-emitting diodes whose light-emitting chips have a rectangular light-emitting surface with a size of 1 × 4 mm square, for example, and are disposed behind the rear-side focal point F of the projection lens 35, and In the state supported by 33, the optical axis Ax and the reference axes Bx and Cx are arranged upward in the vertical direction.

センターリフレクタ30は、LED25の上方側に設けられた略ドーム状の部材であって、該LED25からの光を前方へ向けて光軸Ax寄りに集光反射させる反射面31を有している。
この反射面31は、光軸Axを中心軸とする略楕円球面状に形成されている。具体的には、この反射面31は、光軸Axを含む断面形状が略楕円形状に設定されており、その離心率が鉛直断面から水平断面へ向けて徐々に大きくなるように設定されている。
The center reflector 30 is a substantially dome-shaped member provided on the upper side of the LED 25 and has a reflecting surface 31 that condenses and reflects light from the LED 25 toward the optical axis Ax toward the front.
The reflecting surface 31 is formed in a substantially elliptical spherical shape with the optical axis Ax as the central axis. Specifically, the reflecting surface 31 is set to have a substantially elliptical cross-sectional shape including the optical axis Ax, and the eccentricity is set to gradually increase from the vertical cross section toward the horizontal cross section. .

ただし、これら各断面を形成する楕円の後方側焦点は同一位置に設定されており、LED25はこの反射面30aの鉛直断面を形成する楕円の第1焦点に配置されている。これにより、反射面30aは、図4に示すように、LED25からの光を前方へ向けて光軸Ax寄りに集光反射させ、その際、光軸Axを含む鉛直断面内においては上記楕円の第2焦点(投影レンズ35の後方側焦点F)に略収束させるようになっている。   However, the rear focal points of the ellipses forming the respective cross sections are set at the same position, and the LED 25 is disposed at the first focal point of the ellipse forming the vertical cross section of the reflecting surface 30a. Thereby, as shown in FIG. 4, the reflecting surface 30a condenses and reflects the light from the LED 25 toward the optical axis Ax toward the front, and in this case, the elliptical shape in the vertical cross section including the optical axis Ax. It is made to substantially converge to the second focal point (the rear focal point F of the projection lens 35).

センターリフレクタ30の左側に位置するサイドリフレクタ40は、LED26の上方側に設けられた略ドーム状の部材であって、該LED26からの光を前方へ向けて光軸Bx寄りに拡散反射させる反射面41を有している(図5参照)。
更に、反射面41は、光軸Bxを中心軸とする略楕円球面状に形成されているが、光軸Ax寄りの内側反射面41aは、センターリフレクタ30の反射面31より集光度が小さいつなぎ反射領域とされ、光軸Axと反対寄りの外側反射面41bは、つなぎ反射領域より集光度が小さい拡散反射領域とされている。
The side reflector 40 located on the left side of the center reflector 30 is a substantially dome-shaped member provided on the upper side of the LED 26, and reflects the light from the LED 26 toward the optical axis Bx toward the front and diffusely reflects it. 41 (see FIG. 5).
Furthermore, although the reflecting surface 41 is formed in a substantially elliptical spherical shape with the optical axis Bx as the central axis, the inner reflecting surface 41a near the optical axis Ax is a connection having a smaller light collection degree than the reflecting surface 31 of the center reflector 30. The outer reflection surface 41b, which is a reflection region and is opposite to the optical axis Ax, is a diffuse reflection region having a smaller light collection degree than the connection reflection region.

具体的には、内側反射面41aは光軸Bxを含む断面形状が略楕円形状に設定されており、センターリフレクタ30の反射面31よりもその離心率が鉛直断面から水平断面へ向けて徐々に大きくなるように設定されている(図5参照)。また、外側反射面41bは光軸Bxを含む断面形状が略楕円形状に設定されており、内側反射面41aよりも更にその離心率が鉛直断面から水平断面へ向けて徐々に大きくなるように設定されている(図6参照)。   Specifically, the inner reflective surface 41a is set to have a substantially elliptical cross-sectional shape including the optical axis Bx, and the eccentricity of the inner reflective surface 41a gradually increases from the vertical cross section toward the horizontal cross section than the reflective surface 31 of the center reflector 30. It is set so as to increase (see FIG. 5). Further, the outer reflective surface 41b is set to have a substantially elliptical cross section including the optical axis Bx, and the eccentricity is set to gradually increase from the vertical cross section toward the horizontal cross section than the inner reflective surface 41a. (See FIG. 6).

センターリフレクタ30の右側に位置するサイドリフレクタ50は、LED27の上方側に設けられた略ドーム状の部材であって、該LED27からの光を前方へ向けて光軸Cx寄りに拡散反射させる反射面51を有している(図4参照)。
更に、反射面51は、光軸Cxを中心軸とする略楕円球面状に形成されているが、光軸Ax寄りの内側反射面51aは、センターリフレクタ30の反射面31より集光度が小さいつなぎ反射領域とされ、光軸Axと反対寄りの外側反射面51bは、つなぎ反射領域より集光度が小さい拡散反射領域とされている。
The side reflector 50 located on the right side of the center reflector 30 is a substantially dome-shaped member provided on the upper side of the LED 27, and reflects the light from the LED 27 toward the optical axis Cx toward the front and diffusely reflects it. 51 (see FIG. 4).
Furthermore, although the reflecting surface 51 is formed in a substantially elliptical spherical shape with the optical axis Cx as the central axis, the inner reflecting surface 51a near the optical axis Ax is a connection having a smaller light collection degree than the reflecting surface 31 of the center reflector 30. The outer reflection surface 51b, which is a reflection region and is opposite to the optical axis Ax, is a diffuse reflection region having a smaller light collection degree than the connection reflection region.

具体的には、内側反射面51aは光軸Cxを含む断面形状が略楕円形状に設定されており、センターリフレクタ30の反射面31よりもその離心率が鉛直断面から水平断面へ向けて徐々に大きくなるように設定されている。また、外側反射面51bは光軸Cxを含む断面形状が略楕円形状に設定されており、内側反射面51aよりも更にその離心率が鉛直断面から水平断面へ向けて徐々に大きくなるように設定されている。
尚、これらセンターリフレクタ30及びサイドリフレクタ40,50は、一体で構成されており、アルミニウム蒸着等により各反射面31,41,51が形成されている。
Specifically, the inner reflective surface 51a is set to have a substantially elliptical cross-sectional shape including the optical axis Cx, and the eccentricity is gradually increased from the vertical cross section toward the horizontal cross section than the reflective surface 31 of the center reflector 30. It is set to be large. The outer reflective surface 51b is set to have a substantially elliptical cross-sectional shape including the optical axis Cx, and the eccentricity is set to gradually increase from the vertical cross section toward the horizontal cross section than the inner reflective surface 51a. Has been.
The center reflector 30 and the side reflectors 40 and 50 are integrally formed, and the reflecting surfaces 31, 41 and 51 are formed by aluminum vapor deposition or the like.

投影レンズ35は、前方側表面が凸面で後方側表面が平面の平凸レンズで構成されている。この投影レンズ35は、図2に示すように、その後方側焦点Fがリフレクタ30の反射面31の第2焦点に位置するようにして光軸Ax上に配置されており、これにより後方側焦点Fを含む焦点面上の像を反転像として前方へ投影するようになっている。   The projection lens 35 is a plano-convex lens having a convex front surface and a flat rear surface. As shown in FIG. 2, the projection lens 35 is disposed on the optical axis Ax so that the rear focal point F is positioned at the second focal point of the reflecting surface 31 of the reflector 30, and thereby the rear focal point. An image on the focal plane including F is projected forward as an inverted image.

本実施形態のシェード29は、投影レンズ35やLED25,26,27のホルダを兼ねるブロック(塊)状であり、一体で構成されたセンターリフレクタ30及びサイドリフレクタ40,50が載置される。
そして、シェード29は、遮光端縁29cが投影レンズ35の後方側焦点F近傍に位置してセンターリフレクタ30及びサイドリフレクタ40,50からの反射光の一部を遮蔽することにより所定の配光パターンのカットオフラインを形成する。
The shade 29 according to the present embodiment has a block (lumb) shape that also serves 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 that are integrally formed are placed thereon.
The shade 29 has a predetermined light distribution pattern by shielding a part of the reflected light from the center reflector 30 and the side reflectors 40 and 50 with the light shielding edge 29c positioned near the rear focal point F of the projection lens 35. Form a cut-off line.

更に、シェード29は、遮光端縁29cから光軸Ax方向後方へ向けて延びる上表面29aがこれらセンターリフレクタ30及びサイドリフレクタ40,50からの反射光の一部を上方側へ反射させる。上表面29aには、反射面処理が施された付加反射面36が形成されている。
即ち、このシェード29は、遮光端縁(すなわち付加反射面36とシェード29の前端面29bとの間の稜線)29cが、投影レンズ35の後方側焦点Fを通るように形成されている。
そして、その付加反射面36において反射光の一部を上向きに反射させることにより、該シェード29によって遮蔽されるべき光を照射光として有効に活用し、これによりLED25,26,27からの出射光の光束利用率を高めるようになっている。
Further, in the shade 29, an upper surface 29a extending from the light shielding edge 29c toward the rear in the optical axis Ax direction reflects part of the reflected light from the center reflector 30 and the side reflectors 40, 50 upward. On the upper surface 29a, an additional reflection surface 36 subjected to a reflection surface treatment is formed.
That is, the shade 29 is formed such that a light shielding edge (that is, a ridge line between the additional reflection surface 36 and the front end surface 29 b of the shade 29) 29 c passes through the rear focal point F of the projection lens 35.
Then, by reflecting a part of the reflected light upward on the additional reflection surface 36, the light to be shielded by the shade 29 is effectively utilized as the irradiation light, and thereby the emitted light from the LEDs 25, 26, 27 The luminous flux utilization factor is increased.

なお、シェード29の遮光端縁29cは、投影レンズ35の像面湾曲に対応すべく、平面視において左右両側が前方へ突出する湾曲状に形成されている。この湾曲した遮光端縁29cは、投影レンズ35の焦点群と一致する。すなわち、シェード29は、遮光端縁29cが投影レンズ35の焦点群に沿って形成され、その遮光端縁29c形状がそのままカットオフライン形状となっている。   The light shielding edge 29c of the shade 29 is formed in a curved shape in which both the left and right sides protrude forward in plan view so as to correspond to the curvature of field of the projection lens 35. The curved light-shielding edge 29 c coincides with the focal group of the projection lens 35. That is, the shade 29 has a light shielding edge 29c formed along the focal point group of the projection lens 35, and the shape of the light shielding edge 29c is a cut-off line shape as it is.

上述したように、本実施形態に係る灯具ユニット20によれば、投影レンズ35を介してセンターリフレクタ30の反射面31による反射光とサイドリフレクタ40,50の反射面41,51による反射光とを前方へ照射するように構成されているので、1個のLED25と2個のLED26,27とからの光を効率良く投影レンズ35に入射させることができ、十分な照射光量を確保することができる。   As described above, according to the lamp unit 20 according to the present embodiment, the reflected light from the reflecting surface 31 of the center reflector 30 and the reflected light from the reflecting surfaces 41 and 51 of the side reflectors 40 and 50 are transmitted via the projection lens 35. Since it is configured to irradiate forward, light from one LED 25 and two LEDs 26 and 27 can be efficiently incident on the projection lens 35, and a sufficient amount of irradiation light can be secured. .

更に、図4に示すように、センターリフレクタ30の反射面31により反射された集光光は、配光パターン内の集光領域を照射する。更に、図5に示すように、サイドリフレクタ40,50の反射面41,51における拡散反射領域である外側反射面41b,51bにより反射された拡散光が拡散領域を照射する。   Furthermore, as shown in FIG. 4, the condensed light reflected by the reflecting surface 31 of the center reflector 30 irradiates the light collecting region in the light distribution pattern. Furthermore, as shown in FIG. 5, the diffused light reflected by the outer reflective surfaces 41b and 51b, which are diffuse reflective regions on the reflective surfaces 41 and 51 of the side reflectors 40 and 50, irradiates the diffused region.

そして、図6に示すように、サイドリフレクタ40,50の反射面41,51におけるつなぎ反射領域である内側反射面41a,51aにより反射された光が、互いにオーバーラップし難い集光領域と拡散領域との間のつなぎ領域を照射する。そこで、センターリフレクタ30とサイドリフレクタ40,50とによって形成した合成配光パターン内の照度を均一化することができる。   Then, as shown in FIG. 6, the light reflected by the inner reflection surfaces 41a and 51a, which are connection reflection regions on the reflection surfaces 41 and 51 of the side reflectors 40 and 50, are unlikely to overlap each other. Irradiate the area between the two. Therefore, the illuminance in the combined light distribution pattern formed by the center reflector 30 and the side reflectors 40 and 50 can be made uniform.

更に、本実施形態の灯具ユニット20は、LED25,26,27が、個別に点消灯制御可能とされている。
そこで、これらLED25,26,27を選択的に点消灯させたり、それぞれ光量を調整したりすることによって、灯具ユニット20全体を回転駆動することなく、例えばカーブ走行時にステアリング舵角や車速に応じて配光パターンを左右に変化させるAFSを構成することができる。
即ち、例えば右カーブにおいてはLED26の光量を上げ、左カーブにおいてはLED27の光量を上げることで、進行方向の視認性を向上させることが可能である(また、この時逆側のLEDの光量を下げることで、灯具ユニット20全体の出力を上げることなく視認性の向上を図ることもできる)。
Further, in the lamp unit 20 of the present embodiment, the LEDs 25, 26, and 27 can be individually controlled to be turned on and off.
Therefore, by selectively turning on and off these LEDs 25, 26, and 27, and adjusting the amount of light respectively, the entire lamp unit 20 is driven to rotate, for example, according to the steering rudder angle and the vehicle speed during curve driving. An AFS that changes the light distribution pattern to the left and right can be configured.
That is, for example, by increasing the light amount of the LED 26 on the right curve and increasing the light amount of the LED 27 on the left curve, it is possible to improve the visibility in the traveling direction. By lowering, visibility can be improved without increasing the output of the entire lamp unit 20).

更に、本実施形態に係る灯具ユニット20は、シェード29が投影レンズ35やセンターリフレクタ30及びサイドリフレクタ40,50のホルダを兼ねる構成となっているので、車両用灯具100の組付けを行う前の段階で投影レンズ35とセンターリフレクタ30とサイドリフレクタ40,50とシェード29との位置関係を制度良く設定しておくことができ、これにより車両用灯具100の組付けを容易に行うことができる。   Further, in the lamp unit 20 according to the present embodiment, the shade 29 serves as a holder for the projection lens 35, the center reflector 30 and the side reflectors 40 and 50, so that the vehicle lamp 100 is not assembled. The positional relationship among the projection lens 35, the center reflector 30, the side reflectors 40 and 50, and the shade 29 can be set in a systematic manner, whereby the vehicle lamp 100 can be easily assembled.

また、本実施形態においては、一対のLED26,27が、光軸Ax寄りに15度〜35度傾斜した方向に延びる左右一対の基準軸Bx,Cx上に配置されているので、灯具ユニット20をコンパクトに構成することができる。   In the present embodiment, the pair of LEDs 26 and 27 are disposed on the pair of left and right reference axes Bx and Cx extending in the direction inclined by 15 to 35 degrees close to the optical axis Ax. It can be configured compactly.

尚、本発明の車両用灯具ユニットは、上述した実施形態の構成に何ら限定されるものではなく、その趣旨に基づいて種々の形態を採り得るものであることは云うまでもない。
例えば、上記実施形態においては、車両用灯具ユニットがロービーム用のヘッドランプに用いられる場合について説明したが、シェードを省略したり、複数対のサイドリフレクタと半導体発光素子とを組合せて用いたりして、車両用灯具ユニットをフォグランプやベンディングランプ等の種々の車両用灯具ユニットに用いることも可能であり、この様な場合においても上記実施形態と同様の作用効果を得ることができる。また、光源としての半導体発光素子も発光ダイオードに限らず、LD(半導体レーザ)等も採用可能である。
Note that the vehicular lamp unit of the present invention is not limited to the configuration of the above-described embodiment, and it goes without saying that various forms can be taken based on the gist thereof.
For example, in the above embodiment, the case where the vehicular lamp unit is used for a low beam headlamp has been described. However, the shade may be omitted, or a plurality of pairs of side reflectors and semiconductor light emitting elements may be used in combination. The vehicle lamp unit can also be used for various vehicle lamp units such as fog lamps and bending lamps. Even in such a case, the same effect as that of the above embodiment can be obtained. Further, the semiconductor light emitting element as the light source is not limited to the light emitting diode, and an LD (semiconductor laser) or the like can be employed.

本発明の一実施形態に係る車両用灯具ユニットを備えた車両用灯具の縦断面図である。It is a longitudinal cross-sectional view of the vehicle lamp provided with the vehicle lamp unit which concerns on one Embodiment of this invention. 図1に示した車両用灯具ユニットの基本構成を説明する縦断面図である。It is a longitudinal cross-sectional view explaining the basic composition of the vehicle lamp unit shown in FIG. 図2に示したリフレクタの底面図である。It is a bottom view of the reflector shown in FIG. 図1に示した車両用灯具ユニットの基本構成を説明する為の水平断面図である。It is a horizontal sectional view for demonstrating the basic composition of the vehicle lamp unit shown in FIG. 図1に示した車両用灯具ユニットの基本構成を説明する為の水平断面図である。It is a horizontal sectional view for demonstrating the basic composition of the vehicle lamp unit shown in FIG. 図1に示した車両用灯具ユニットの基本構成を説明する為の水平断面図である。It is a horizontal sectional view for demonstrating the basic composition of the vehicle lamp unit shown in FIG.

符号の説明Explanation of symbols

20…灯具ユニット(車両用灯具ユニット)
25,26,27…LED(半導体発光素子)
29…シェード
29a…上表面
29c…遮光端縁
30…センターリフレクタ
31…反射面
40,50…サイドリフレクタ
41,51…反射面
41a,51a…内側反射面
41b,51b…外側反射面
35…投影レンズ
36…付加反射面
100…車両用灯具
Ax…光軸
Bx…基準軸
Cx…基準軸
F…後方側焦点
20. Lamp unit (vehicle lamp unit)
25, 26, 27 ... LED (semiconductor light emitting element)
DESCRIPTION OF SYMBOLS 29 ... Shade 29a ... Upper surface 29c ... Light-shielding edge 30 ... Center reflector 31 ... Reflecting surface 40, 50 ... Side reflector 41, 51 ... Reflecting surface 41a, 51a ... Inner reflecting surface 41b, 51b ... Outer reflecting surface 35 ... Projection lens 36 ... Additional reflecting surface 100 ... Vehicle lamp Ax ... Optical axis Bx ... Reference axis Cx ... Reference axis F ... Focus on the rear side

Claims (4)

車両前後方向に延びる光軸上に配置された投影レンズと、
前記投影レンズの後方側焦点よりも後方において前記光軸上に配置された第1半導体発光素子と、
前記第1半導体発光素子からの光を前方に向けて前記光軸寄りに反射させる反射面を有するセンターリフレクタと、
前記第1半導体発光素子の左右両側において前記光軸寄りに傾斜した方向に延びる左右一対ずつの基準軸上に配置された複数の第2半導体発光素子と、
前記各第2半導体発光素子からの光を前方に向けて前記各基準軸寄りに反射させる反射面を有するサイドリフレクタと、を備え、
前記サイドリフレクタの反射面における前記光軸寄りの内側反射面が、前記センターリフレクタの反射面より集光度が小さいつなぎ反射領域とされ、
前記サイドリフレクタの反射面における前記光軸と反対寄りの外側反射面が、前記つなぎ反射領域より集光度が小さい拡散反射領域とされることを特徴とする車両用灯具ユニット。
A projection lens disposed on an optical axis extending in the vehicle longitudinal direction;
A first semiconductor light emitting element disposed on the optical axis behind the rear focal point of the projection lens;
A center reflector having a reflecting surface for reflecting light from the first semiconductor light emitting element forward and toward the optical axis;
A plurality of second semiconductor light emitting elements disposed on a pair of left and right reference axes extending in a direction inclined toward the optical axis on both left and right sides of the first semiconductor light emitting element;
A side reflector having a reflecting surface for reflecting light from each of the second semiconductor light emitting elements forward and toward each reference axis; and
The inner reflection surface near the optical axis in the reflection surface of the side reflector is a connection reflection region having a smaller concentration than the reflection surface of the center reflector,
The vehicular lamp unit according to claim 1, wherein an outer reflection surface opposite to the optical axis in the reflection surface of the side reflector is a diffuse reflection region having a light collection degree smaller than that of the connection reflection region.
前記第1半導体発光素子及び前記各第2半導体発光素子は、個別に点消灯制御可能であることを特徴とする請求項1に記載の車両用灯具ユニット。   2. The vehicle lamp unit according to claim 1, wherein the first semiconductor light emitting element and each of the second semiconductor light emitting elements can be individually controlled to be turned on and off. 一対の前記第2半導体発光素子が、前記光軸寄りに15度〜35度傾斜した方向に延びる左右一対の基準軸上に配置されることを特徴とする請求項1又は請求項2に記載の車両用灯具ユニット。   3. The pair of second semiconductor light emitting elements are disposed on a pair of left and right reference axes extending in a direction inclined by 15 to 35 degrees toward the optical axis. 4. Vehicle lamp unit. 前記投影レンズと前記第1及び第2半導体発光素子との間には、前記センターリフレクタ及び前記サイドリフレクタからの反射光の一部を遮蔽することにより配光パターンのカットオフラインを形成するシェードが配置されていることを特徴とする請求項1〜請求項3の何れか1項に記載の車両用灯具ユニット。   A shade is formed between the projection lens and the first and second semiconductor light emitting elements to form a cut-off line of a light distribution pattern by shielding part of the reflected light from the center reflector and the side reflector. The vehicular lamp unit according to any one of claims 1 to 3, wherein the vehicular lamp unit is provided.
JP2008218478A 2008-08-27 2008-08-27 Vehicle lamp unit Expired - Fee Related JP5087500B2 (en)

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