JP5612996B2 - Vehicle headlamp - Google Patents

Vehicle headlamp Download PDF

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JP5612996B2
JP5612996B2 JP2010226198A JP2010226198A JP5612996B2 JP 5612996 B2 JP5612996 B2 JP 5612996B2 JP 2010226198 A JP2010226198 A JP 2010226198A JP 2010226198 A JP2010226198 A JP 2010226198A JP 5612996 B2 JP5612996 B2 JP 5612996B2
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light distribution
mirror
light
reflection
region
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JP2012079636A (en
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佐藤　孝
孝 佐藤
雅典 大野
雅典 大野
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Stanley Electric Co Ltd
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    • 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
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving 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
    • F21S41/10—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
    • F21S41/16—Laser 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
    • F21S41/30—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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas
    • 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

Description

本発明は、車両用前照灯に関する。   The present invention relates to a vehicle headlamp.

近年、自動車用ヘッドライトなどの車両用前照灯においては、配光パターンを変更可能な可変配光型のものが開発されている。この種の車両用前照灯としては、光源からの光の遮光パターンを変化させるものや複数の光源の発光パターンを変化させるものが多く提案されているが、前者は光束利用率を低減させてしまい、後者は構造的に簡便でないために、何れも好ましくない。   2. Description of the Related Art In recent years, a variable light distribution type that can change a light distribution pattern has been developed for vehicle headlamps such as automobile headlights. Many types of vehicle headlamps have been proposed that change the light-blocking pattern of light from the light source or the light-emitting patterns of a plurality of light sources, but the former reduces the luminous flux utilization factor. In other words, the latter is not preferred because it is not structurally simple.

そこで、例えば特許文献１に記載の車両用前照灯では、往復運動可能なミラーを設け、このミラーの周期運動に光源のＯＮ／ＯＦＦ制御を組み合わせることで照度分布（配光パターン）の変更を実現している。   Therefore, for example, in the vehicle headlamp described in Patent Document 1, a mirror capable of reciprocating motion is provided, and the illuminance distribution (light distribution pattern) is changed by combining the periodic motion of the mirror with ON / OFF control of the light source. Realized.

特開２０１０−００６１０９号公報JP 2010-006109 A

しかしながら、上記特許文献１に記載の車両用前照灯では、ミラーの位置検出や光源のＯＮ／ＯＦＦ切替えに精密な制御が要求され、複雑な制御回路を必要とするために、コストや信頼性の面で好ましくない。   However, the vehicle headlamp described in Patent Document 1 requires precise control for mirror position detection and light source ON / OFF switching, and requires a complicated control circuit. This is not preferable.

本発明は、上記事情を鑑みてなされたもので、複雑な制御回路を必要とすることなく、また、光束利用率を低減させることなく且つ簡易な構造で、配光パターンを変更することのできる車両用前照灯の提供を課題とする。   The present invention has been made in view of the above circumstances, and the light distribution pattern can be changed with a simple structure without requiring a complicated control circuit and without reducing the luminous flux utilization factor. An object is to provide a vehicle headlamp.

上記課題を解決するために、請求項１に記載の発明は、
光源と、
正弦波周期で往復揺動しつつ前記光源からの光を反射させるミラーと、
前記光源から出射され前記ミラーで反射された反射光を車両前方へ反射させるリフレクタと、
前記ミラーの揺動範囲を制御可能な制御部と、
を備え、車両前方に配光パターンを形成する車両用前照灯であって、
前記リフレクタの反射面は、当該反射面上で前記反射光が移動する方向に沿って長尺に形成されるとともに、この長尺方向に沿って複数の反射領域に分割されており、
前記複数の反射領域は、前記長尺方向の中央の第１反射領域と、当該第１反射領域に隣接する第２反射領域と、当該第２反射領域よりも端部側に位置する第３反射領域とを含み、
前記第１反射領域は、前記ミラーの揺動に伴う当該ミラーからの反射光を左右へ拡散させて、車両前方に拡散配光照射域を形成し、
前記第２反射領域及び前記第３反射領域は、前記ミラーの揺動に伴う当該ミラーからの反射光を前記拡散配光照射域よりも左右中央に個別に集光させて、車両前方に第１集光配光照射域及び第２集光配光照射域を形成し、
前記制御部は、前記ミラーの揺動範囲を変更することにより、当該ミラーの揺動に伴って前記リフレクタの反射面上で前記ミラーからの反射光が移動する範囲を変更させて、前記配光パターンを第１配光パターンと第２配光パターンとに変更可能であり、
前記第１配光パターンは、前記ミラーからの反射光が前記第１反射領域及び前記第２反射領域に亘って移動することにより、前記拡散配光照射域及び前記第１集光配光照射域が重畳されてなるものであり、
前記第２配光パターンは、前記ミラーからの反射光が前記第１反射領域、前記第２反射領域及び前記第３反射領域に亘って移動することにより、前記拡散配光照射域、前記第１集光配光照射域及び前記第２集光配光照射域が重畳されてなるものであることを特徴とする。 In order to solve the above problems, the invention according to claim 1,
A light source;
A mirror Ru reflects the light from the light source while reciprocally swung by a sine wave cycle,
A reflector that reflects the reflected light emitted from the light source and reflected by the mirror forward of the vehicle;
A control unit capable of controlling the swing range of the mirror;
A vehicle headlamp that forms a light distribution pattern in front of the vehicle,
The reflective surface of the reflector is formed long along the direction in which the reflected light moves on the reflective surface, and is divided into a plurality of reflective regions along the long direction,
The plurality of reflection areas include a first reflection area in the center in the longitudinal direction, a second reflection area adjacent to the first reflection area, and a third reflection located closer to the end than the second reflection area. Area and
The first reflection region diffuses reflected light from the mirror accompanying the swing of the mirror to the left and right to form a diffused light distribution irradiation region in front of the vehicle,
The second reflection area and the third reflection area first collect the reflected light from the mirror accompanying the swinging of the mirror separately in the center of the left and right sides of the diffused light distribution irradiation area, and the first reflection area is first in front of the vehicle. Forming a focused light distribution irradiation area and a second focused light distribution irradiation area;
Wherein, by changing the swinging range of the mirror, by changing the range in which reflected light travels from the mirror on the reflecting surface of the reflector with the swinging of the mirror, the light distribution The pattern can be changed to a first light distribution pattern and a second light distribution pattern,
In the first light distribution pattern, reflected light from the mirror moves across the first reflection region and the second reflection region, so that the diffused light distribution irradiation region and the first light collection light distribution irradiation region. Are superimposed,
In the second light distribution pattern, the reflected light from the mirror moves over the first reflection region, the second reflection region, and the third reflection region, whereby the diffused light distribution irradiation region, the first light distribution pattern, The condensed light distribution irradiation area and the second condensed light distribution irradiation area are overlapped with each other.

請求項２に記載の発明は、請求項１に記載の車両用前照灯において、
前記第１反射領域、前記第２反射領域及び前記第３反射領域は、前記ミラーからの反射光を主に水平線よりも下側に向けて個別に照射して、前記拡散配光照射域、前記第１集光配光照射域及び前記第２集光配光照射域を形成し、
前記第３反射領域は、前記ミラーからの反射光を前記第１集光配光照射域よりも左右中央に集光させて、前記第２集光配光照射域を形成し、
前記第１配光パターン及び前記第２配光パターンが何れもすれ違い用配光パターンであることを特徴とする。 The invention according to claim 2 is the vehicle headlamp according to claim 1,
The first reflection region, the second reflection region, and the third reflection region individually irradiate reflected light from the mirror mainly downward below a horizontal line, and the diffused light distribution irradiation region, Forming a first focused light distribution irradiation area and a second focused light distribution irradiation area;
The third reflection region condenses the reflected light from the mirror in the center of the left and right of the first light collection light distribution irradiation region to form the second light collection light distribution irradiation region,
The first light distribution pattern and the second light distribution pattern are both passing light distribution patterns .

請求項３に記載の発明は、請求項１に記載の車両用前照灯において、
前記第１反射領域及び前記第２反射領域は、前記ミラーからの反射光を主に水平線よりも下側に向けて個別に照射して、前記拡散配光照射域及び前記第１集光配光照射域を形成し、
前記第３反射領域は、前記ミラーからの反射光を主に水平線よりも上側に向けて照射して、前記第２集光配光照射域を形成し、
前記第１配光パターンがすれ違い用配光パターンであり、前記第２配光パターンが走行用配光パターンであることを特徴とする。 The invention according to claim 3 is the vehicle headlamp according to claim 1 ,
The first reflection region and the second reflection region individually irradiate reflected light from the mirror mainly downward below a horizontal line, and the diffuse light distribution irradiation region and the first light collection light distribution. Form an irradiation area,
The third reflection region irradiates reflected light from the mirror mainly upward from the horizontal line to form the second focused light distribution irradiation region,
The first light distribution pattern is a passing light distribution pattern, and the second light distribution pattern is a traveling light distribution pattern .

本発明によれば、制御部がミラーの揺動範囲を変更することにより、当該ミラーの揺動に伴ってリフレクタの反射面上でミラーからの反射光が移動する範囲を変更することができ、ひいては配光パターンを変更することができる。つまり、ミラーの揺動幅を変更するだけで配光パターンを変更することができるので、ミラーの位置検出や光源のＯＮ／ＯＦＦ切替えに精密な制御を要した従来と異なり、複雑な制御回路を不要とすることができる。また、光を遮光する必要がないので光束利用率を低減させることもなく、複数の光源を要せず単一の光源で足りるので簡易な構造とすることができる。   According to the present invention, the control unit can change the range in which the reflected light from the mirror moves on the reflecting surface of the reflector as the mirror swings, by changing the swing range of the mirror. Eventually, the light distribution pattern can be changed. In other words, the light distribution pattern can be changed simply by changing the mirror swing width. Unlike conventional systems that require precise control for mirror position detection and light source ON / OFF switching, a complicated control circuit is required. It can be unnecessary. Further, since it is not necessary to block light, the luminous flux utilization factor is not reduced, and a single light source is sufficient without using a plurality of light sources, so that a simple structure can be achieved.

実施形態における車両用前照灯の概略構成を示す概念図である。It is a conceptual diagram which shows schematic structure of the vehicle headlamp in embodiment. 実施形態におけるリフレクタの正面図である。It is a front view of the reflector in an embodiment. ミラーの揺動パターンを示す図である。It is a figure which shows the rocking | fluctuation pattern of a mirror. 実施形態における車両用前照灯が形成する配光パターンを示す図である。It is a figure which shows the light distribution pattern which the vehicle headlamp in embodiment forms. 実施形態の第１の変形例におけるリフレクタの正面図である。It is a front view of the reflector in the 1st modification of an embodiment. 実施形態の第１の変形例における車両用前照灯が形成する配光パターンを示す図である。It is a figure which shows the light distribution pattern which the vehicle headlamp in the 1st modification of embodiment forms. 実施形態の第２の変形例におけるリフレクタの正面図である。It is a front view of the reflector in the 2nd modification of an embodiment. 実施形態の第２の変形例における車両用前照灯が形成する配光パターンを示す図である。It is a figure which shows the light distribution pattern which the vehicle headlamp in the 2nd modification of embodiment forms.

以下、本発明の実施形態について、図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本実施形態における車両用前照灯１の概略構成を示す概念図である。
この図に示すように、車両用前照灯１は、光源２と、ミラーデバイス３と、リフレクタ４と、制御部５とを備えており、光源２から出射させミラーデバイス３で反射させた光をリフレクタ４で更に反射させて車両前方へ照射し、所定の配光パターンを形成するものである。 FIG. 1 is a conceptual diagram showing a schematic configuration of a vehicle headlamp 1 in the present embodiment.
As shown in this figure, the vehicle headlamp 1 includes a light source 2, a mirror device 3, a reflector 4, and a control unit 5, and light emitted from the light source 2 and reflected by the mirror device 3. Is further reflected by the reflector 4 and irradiated to the front of the vehicle to form a predetermined light distribution pattern.

光源２は、ミラーデバイス３に設けられた後述のミラー３１へ向けて光を出射するものである。この光源２は、直進性を有する光を出射するものであればよく、発光ダイオードやレーザーダイオードとしてもよいし、電球や放電灯などの光を集光可能な光源ユニットとしてもよい。   The light source 2 emits light toward a mirror 31 described later provided in the mirror device 3. The light source 2 may be any light source that emits light having straightness, and may be a light emitting diode or a laser diode, or may be a light source unit that can collect light such as a light bulb or a discharge lamp.

ミラーデバイス３は、光源２からの光を反射させるミラー３１を往復揺動可能に支持している。具体的には、ミラーデバイス３は、ミラー３１が正弦波周期で揺動するように当該ミラー３１を支持しており、このようなミラーデバイス３としては、例えば特開２０１０−００６１０９号公報に記載のアクチュエータなど、従来より公知のものを適用することができる。なお、ミラー３１の揺動周波数は、特に限定はされないが、車両用前照灯１からの照射光のフリッカー（ちらつき）を抑制する観点から、６０Ｈｚ以上であるのが好ましい。また、このミラー３１の揺動周波数は、小さい駆動力でミラー３１が揺動可能なように、共振周波数近傍の値であるのが好ましい。   The mirror device 3 supports a mirror 31 that reflects light from the light source 2 so as to be reciprocally swingable. Specifically, the mirror device 3 supports the mirror 31 so that the mirror 31 swings with a sine wave cycle. Such a mirror device 3 is described in, for example, Japanese Patent Application Laid-Open No. 2010-006109. Conventionally known actuators such as the above actuators can be applied. The oscillation frequency of the mirror 31 is not particularly limited, but is preferably 60 Hz or more from the viewpoint of suppressing flicker (flickering) of the irradiation light from the vehicle headlamp 1. The oscillation frequency of the mirror 31 is preferably a value near the resonance frequency so that the mirror 31 can be oscillated with a small driving force.

図２は、リフレクタ４の正面図である。
図１及び図２に示すように、リフレクタ４は、ミラー３１の揺動に伴って当該ミラー３１からの反射光が往復移動する方向に沿って長尺に形成されている。リフレクタ４の前面は反射面４０となっており、この反射面４０でミラー３１からの反射光を車両前方へ反射させる。反射面４０は、リフレクタ４の長尺方向に沿って複数の反射領域に分割されており、本実施形態では、中央の第１反射領域４１と、その両側の２つの第２反射領域４２，４２と、更にその両側の２つの第３反射領域４３，４３とに分割されている。 FIG. 2 is a front view of the reflector 4.
As shown in FIGS. 1 and 2, the reflector 4 is formed long along the direction in which the reflected light from the mirror 31 reciprocates as the mirror 31 swings. The front surface of the reflector 4 is a reflecting surface 40, and the reflected light from the mirror 31 is reflected to the front of the vehicle by the reflecting surface 40. The reflecting surface 40 is divided into a plurality of reflecting regions along the longitudinal direction of the reflector 4. In the present embodiment, the first reflecting region 41 at the center and the two second reflecting regions 42, 42 on both sides thereof. And further divided into two third reflection regions 43 and 43 on both sides thereof.

これら第１反射領域４１〜第３反射領域４３は、ミラー３１の揺動に伴って反射面４０上を移動する反射光を主に上下方向へ拡散させつつ車両前方へ反射させて所定の配光パターンを形成する。具体的には、第１反射領域４１が、左右へ拡散されたすれ違いビーム拡散部ＬＢ１を形成し、第２反射領域４２，４２が、中央に集光されたすれ違いビーム第１集光部ＬＢ２を形成し、第３反射領域４３，４３が、すれ違いビーム第１集光部ＬＢ２よりも更に中央に集光されたすれ違いビーム第２集光部ＬＢ３を形成する（図４（ａ），（ｂ）参照）。このように、反射面４０は、リフレクタ４の長尺方向の中央側の部分（反射領域）ほど車両前方の左右側方へ光を反射させるように形成されている。また、第１反射領域４１〜第３反射領域４３のそれぞれにおいても、リフレクタ４の長尺方向に沿って反射面４０の中央側の部分ほど車両前方の左右側方へ光を反射させるように形成されている。なお、第１反射領域４１〜第３反射領域４３は、複数の面からなる不連続面であってもよいし、連続面であってもよい。   The first reflection area 41 to the third reflection area 43 reflect a predetermined light distribution by reflecting the reflected light moving on the reflection surface 40 along with the swing of the mirror 31 mainly in the vertical direction while reflecting the light forward. Form a pattern. Specifically, the first reflection region 41 forms a passing beam diffusion portion LB1 diffused to the left and right, and the second reflection regions 42 and 42 pass the passing beam first focusing portion LB2 condensed in the center. The third reflection regions 43 and 43 are formed to form a second beam second condensing unit LB3 that is further collected in the center than the first beam condensing unit LB2 (FIGS. 4A and 4B). reference). As described above, the reflecting surface 40 is formed so as to reflect light toward the left and right sides in front of the vehicle toward the center side (reflection area) of the reflector 4 in the longitudinal direction. Further, in each of the first reflection region 41 to the third reflection region 43, the light is reflected toward the left and right sides in front of the vehicle toward the center of the reflection surface 40 along the longitudinal direction of the reflector 4. Has been. In addition, the 1st reflective area | region 41-the 3rd reflective area | region 43 may be a discontinuous surface which consists of a some surface, and may be a continuous surface.

制御部５は、図１に示すように、ミラーデバイス３と電気的に接続されており、ミラー３１の揺動範囲（揺動振幅）を制御可能に構成されている。より詳しくは、制御部５は、ミラー３１を揺動させるための電磁石（図示せず）への通電量を制御可能となっており、この通電量の制御によってミラー３１の揺動周波数を一定に保ちつつ当該ミラー３１の揺動範囲を変更可能となっている。   As shown in FIG. 1, the control unit 5 is electrically connected to the mirror device 3 and configured to be able to control the swing range (swing amplitude) of the mirror 31. More specifically, the control unit 5 can control the energization amount to an electromagnet (not shown) for oscillating the mirror 31, and the oscillation frequency of the mirror 31 is made constant by controlling the energization amount. The swing range of the mirror 31 can be changed while keeping it.

この制御部５は、本実施形態では、図３に示すように、ミラー３１の揺動範囲を第１揺動範囲Ｙ１と第２揺動範囲Ｙ２とに変更可能となっている。このうち第１揺動範囲Ｙ１は、ミラー３１からの反射光を、リフレクタ４の反射面４０のうちの第１反射領域４１及び第２反射領域４２，４２に亘る第１移動範囲Ｒ１で移動させ、一方の第２揺動範囲Ｙ２は、第１反射領域４１，第２反射領域４２，４２及び第３反射領域４３，４３に亘る第２移動範囲Ｒ２で移動させる（図２参照）。   In this embodiment, the control unit 5 can change the swing range of the mirror 31 to a first swing range Y1 and a second swing range Y2, as shown in FIG. Of these, the first swing range Y1 moves the reflected light from the mirror 31 within the first movement range R1 across the first reflection area 41 and the second reflection areas 42 and 42 of the reflection surface 40 of the reflector 4. One of the second swing ranges Y2 is moved within a second movement range R2 over the first reflection area 41, the second reflection areas 42 and 42, and the third reflection areas 43 and 43 (see FIG. 2).

したがって、制御部５がミラー３１を第１揺動範囲Ｙ１で揺動させた場合には、光源２から出射されミラー３１で反射された反射光が、第１反射領域４１及び第２反射領域４２，４２に亘る第１移動範囲Ｒ１で反射面４０上を移動し、図４（ａ），（ｃ）に示すように、すれ違いビーム拡散部ＬＢ１及びすれ違いビーム第１集光部ＬＢ２からなる第１すれ違いビームＬＰ１が車両前方に形成される。
一方、制御部５がミラー３１を第２揺動範囲Ｙ２で揺動させた場合には、光源２から出射されミラー３１で反射された反射光が、第１反射領域４１，第２反射領域４２，４２及び第３反射領域４３，４３に亘る第２移動範囲Ｒ２で反射面４０上を移動し、図４（ｂ），（ｃ）に示すように、すれ違いビーム拡散部ＬＢ１，すれ違いビーム第１集光部ＬＢ２及びすれ違いビーム第２集光部ＬＢ３からなる第２すれ違いビームＬＰ２が車両前方に形成される。この第２すれ違いビームＬＰ２は、第１すれ違いビームＬＰ１よりも中央への集光度が高く、より遠方を照射可能な配光パターンである。 Therefore, when the control unit 5 swings the mirror 31 within the first swing range Y1, the reflected light emitted from the light source 2 and reflected by the mirror 31 is reflected in the first reflection region 41 and the second reflection region 42. , 42 is moved on the reflecting surface 40 within a first movement range R1, and as shown in FIGS. 4A and 4C, a first beam comprising a passing beam diffusing unit LB1 and a passing beam first focusing unit LB2. A passing beam LP1 is formed in front of the vehicle.
On the other hand, when the control unit 5 swings the mirror 31 in the second swing range Y2, the reflected light emitted from the light source 2 and reflected by the mirror 31 is the first reflection region 41 and the second reflection region 42. , 42 and the second moving range R2 over the third reflecting regions 43, 43, and moves on the reflecting surface 40, as shown in FIGS. 4B and 4C, the passing beam diffusing unit LB1, the passing beam first. A second low beam LP2 including the light condensing unit LB2 and the low beam second condensing unit LB3 is formed in front of the vehicle. The second passing beam LP2 is a light distribution pattern that has a higher degree of condensing at the center than the first passing beam LP1 and can irradiate farther.

このように、制御部５がミラー３１の揺動範囲を変更することにより、ミラー３１の揺動に伴って反射面４０上で反射光が移動する範囲を変更させて、第１すれ違いビームＬＰ１と第２すれ違いビームＬＰ２とに配光パターンを変更することができる。これにより、例えば、中央への集光をさほど要しない市街地などの走行時には第１すれ違いビームＬＰ１を形成し、中央への集光が必要な郊外や高速道路などの走行時には第２すれ違いビームＬＰ２を形成するなどして、走行状況に応じて配光パターンを適宜変更することができる。   As described above, the control unit 5 changes the swing range of the mirror 31, thereby changing the range in which the reflected light moves on the reflection surface 40 as the mirror 31 swings, and the first passing beam LP 1. The light distribution pattern can be changed to the second passing beam LP2. Thus, for example, the first passing beam LP1 is formed when traveling in an urban area or the like that does not require much focusing on the center, and the second passing beam LP2 is generated when traveling on a suburb or highway that requires focusing on the center. For example, the light distribution pattern can be changed as appropriate according to the traveling situation.

以上の車両用前照灯１によれば、ミラー３１の揺動範囲を変更するだけで配光パターンを変更することができるので、ミラーの位置検出や光源のＯＮ／ＯＦＦ切替えに精密な制御を要した従来と異なり、複雑な制御回路を不要とすることができる。また、光を遮光する必要がないので光束利用率を低減させることもなく、複数の光源を要せず単一の光源２で足りるので簡易な構造とすることができる。   According to the vehicle headlamp 1 described above, the light distribution pattern can be changed simply by changing the swing range of the mirror 31. Therefore, precise control is performed for mirror position detection and light source ON / OFF switching. Unlike the conventional technique, a complicated control circuit can be dispensed with. Further, since it is not necessary to block light, the luminous flux utilization factor is not reduced, and a single light source 2 is sufficient without using a plurality of light sources, so that a simple structure can be achieved.

また、ミラー３１が正弦波周期で揺動し、反射面４０がリフレクタ４の長尺方向の中央側の部分ほど車両前方の左右側方へ光を反射させるように形成されているので、反射面４０のうち当該反射面４０上を移動する反射光の移動速度が速い部分、つまり単位時間当たりの反射光量が少ない部分ほど車両前方の左右側方へ反射光を反射させ、単位時間当たりの反射光量が多い部分ほど車両前方の中央側へ反射光を反射させるように構成することができる。したがって、車両前方の中央へ容易に光を集光させることができるため、中央の遠方視認性と左右の適度な広がりとを有する好適な配光パターンを容易に形成することができる。   Further, since the mirror 31 is swung with a sine wave cycle, and the reflection surface 40 is formed so as to reflect light toward the left and right sides in front of the vehicle at the central portion of the reflector 4 in the longitudinal direction, 40, the part where the moving speed of the reflected light moving on the reflecting surface 40 is fast, that is, the part where the reflected light amount per unit time is small, reflects the reflected light to the left and right sides in front of the vehicle, and the reflected light amount per unit time. It can be configured to reflect the reflected light toward the center side in front of the vehicle as the portion has more. Therefore, since the light can be easily collected to the center in front of the vehicle, a suitable light distribution pattern having a center far visibility and an appropriate right and left spread can be easily formed.

［変形例１］
続いて、上記実施形態の第１の変形例について説明する。なお、上記実施形態と同様の構成要素には同一の符号を付し、その説明を省略する。
本第１の変形例における車両用前照灯１は、上記実施形態におけるリフレクタ４に代えて、リフレクタ４Ａを備えている。 [Modification 1]
Then, the 1st modification of the said embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the component similar to the said embodiment, and the description is abbreviate | omitted.
The vehicle headlamp 1 in the first modified example includes a reflector 4A instead of the reflector 4 in the above embodiment.

図５は、リフレクタ４Ａの正面図である。
この図に示すように、リフレクタ４Ａは、前面の反射面４０Ａが、中央の第１反射領域４１ａと、その両側の２つの第２反射領域４２ａ，４２ａと、更にその両側の２つの第３反射領域４３ａ，４３ａとに長尺方向に沿って分割されている。第１反射領域４１ａは、車両前方に形成する配光パターンのうち、左右へ拡散されたすれ違いビーム拡散部ＬＢ１ａを形成し、第２反射領域４２ａ，４２ａは、中央に集光されたすれ違いビーム集光部ＬＢ２ａを形成し、第３反射領域４３ａ，４３ａは、水平線より上方の走行ビーム上部ＨＢａを形成する（図６（ａ），（ｂ）参照）。 FIG. 5 is a front view of the reflector 4A.
As shown in this figure, the reflector 4A has a front reflective surface 40A having a central first reflective area 41a, two second reflective areas 42a and 42a on both sides thereof, and two third reflective areas on both sides thereof. It divides | segments along the elongate direction into area | region 43a, 43a. The first reflection area 41a forms a passing beam diffusing portion LB1a diffused to the left and right in the light distribution pattern formed in front of the vehicle, and the second reflection areas 42a and 42a collect the passing beam collected at the center. The light portion LB2a is formed, and the third reflection regions 43a and 43a form a traveling beam upper portion HBa above the horizontal line (see FIGS. 6A and 6B).

また、本第１の変形例における車両用前照灯１では、制御部５がミラー３１の揺動範囲（揺動振幅）を第１揺動範囲Ｙ１ａと第２揺動範囲Ｙ２ａとに変更可能となっている（図３参照）。このうち第１揺動範囲Ｙ１ａは、ミラー３１からの反射光を、リフレクタ４Ａの反射面４０Ａのうちの第１反射領域４１ａ及び第２反射領域４２ａ，４２ａに亘る第１移動範囲Ｒ１ａで移動させ、一方の第２揺動範囲Ｙ２ａは、第１反射領域４１ａ，第２反射領域４２ａ，４２ａ及び第３反射領域４３ａ，４３ａに亘る第２移動範囲Ｒ２ａで移動させる。   In the vehicle headlamp 1 according to the first modified example, the control unit 5 can change the swing range (swing amplitude) of the mirror 31 to the first swing range Y1a and the second swing range Y2a. (See FIG. 3). Of these, the first swing range Y1a moves the reflected light from the mirror 31 within the first movement range R1a over the first reflection area 41a and the second reflection areas 42a, 42a of the reflection surface 40A of the reflector 4A. One second swinging range Y2a is moved within a second movement range R2a that spans the first reflection area 41a, the second reflection areas 42a, 42a, and the third reflection areas 43a, 43a.

したがって、制御部５がミラー３１を第１揺動範囲Ｙ１ａで揺動させた場合には、光源２から出射されミラー３１で反射された反射光が第１移動範囲Ｒ１ａで反射面４０Ａ上を移動し、図６（ａ），（ｃ）に示すように、すれ違いビーム拡散部ＬＢ１ａ及びすれ違いビーム集光部ＬＢ２ａからなるすれ違いビームＬＰａが車両前方に形成される。
一方、制御部５がミラー３１を第２揺動範囲Ｙ２ａで揺動させた場合には、光源２から出射されミラー３１で反射された反射光が第２移動範囲Ｒ２ａで反射面４０Ａ上を移動し、図６（ｂ），（ｃ）に示すように、すれ違いビーム拡散部ＬＢ１ａ，すれ違いビーム集光部ＬＢ２ａ及び走行ビーム上部ＨＢａからなる走行ビームＨＰａが車両前方に形成される。 Therefore, when the control unit 5 swings the mirror 31 within the first swing range Y1a, the reflected light emitted from the light source 2 and reflected by the mirror 31 moves on the reflection surface 40A within the first movement range R1a. Then, as shown in FIGS. 6A and 6C, a passing beam LPa including a passing beam diffusing portion LB1a and a passing beam condensing portion LB2a is formed in front of the vehicle.
On the other hand, when the control unit 5 swings the mirror 31 within the second swing range Y2a, the reflected light emitted from the light source 2 and reflected by the mirror 31 moves on the reflection surface 40A within the second movement range R2a. Then, as shown in FIGS. 6B and 6C, a traveling beam HPa including a passing beam diffusing unit LB1a, a passing beam condensing unit LB2a, and a traveling beam upper portion HBa is formed in front of the vehicle.

このように、本第１の変形例における車両用前照灯１によれば、制御部５がミラー３１の揺動範囲を変更することにより、すれ違いビームＬＰａと走行ビームＨＰａとに配光パターンを変更することができる。   As described above, according to the vehicle headlamp 1 in the first modification, the control unit 5 changes the swing range of the mirror 31 so that the light distribution pattern is provided to the passing beam LPa and the traveling beam HPa. Can be changed.

［変形例２］
続いて、上記実施形態の第２の変形例について説明する。なお、上記実施形態と同様の構成要素には同一の符号を付し、その説明を省略する。
本第２の変形例における車両用前照灯１は、上記実施形態におけるリフレクタ４に代えて、リフレクタ４Ｂを備えている。 [Modification 2]
Then, the 2nd modification of the said embodiment is demonstrated. In addition, the same code | symbol is attached | subjected to the component similar to the said embodiment, and the description is abbreviate | omitted.
The vehicle headlamp 1 in the second modified example includes a reflector 4B instead of the reflector 4 in the above embodiment.

図７は、リフレクタ４Ｂの正面図である。
この図に示すように、リフレクタ４Ｂは、前面の反射面４０Ｂが、中央の第１反射領域４１ｂと、その両側の２つの第２反射領域４２ｂ，４２ｂと、更にその両側の２つの第３反射領域４３ｂ，４３ｂと、更にその両側の２つの第４反射領域４４ｂ，４４ｂとに長尺方向に沿って分割されている。第１反射領域４１ｂは、車両前方に形成する配光パターンのうち、左右へ拡散されたすれ違いビーム拡散部ＬＢ１ｂを形成し、第２反射領域４２ｂ，４２ｂは、中央に集光されたすれ違いビーム第１集光部ＬＢ２ｂを形成し、第３反射領域４３ｂ，４３ｂは、すれ違いビーム第１集光部ＬＢ２ｂよりも更に中央に集光されたすれ違いビーム第２集光部ＬＢ３ｂを形成し、第４反射領域４４ｂ，４４ｂは、水平線より上方の走行ビーム上部ＨＢｂを形成する（図８（ａ）〜（ｃ）参照）。 FIG. 7 is a front view of the reflector 4B.
As shown in this figure, the reflector 4B has a front reflective surface 40B having a central first reflective area 41b, two second reflective areas 42b and 42b on both sides thereof, and two third reflective areas on both sides thereof. The regions 43b and 43b are further divided along the longitudinal direction into two fourth reflecting regions 44b and 44b on both sides thereof. The first reflection area 41b forms a passing beam diffusion portion LB1b diffused to the left and right in the light distribution pattern formed in front of the vehicle, and the second reflection areas 42b and 42b The first condensing part LB2b is formed, and the third reflection regions 43b and 43b form the passing beam second condensing part LB3b that is further collected in the center than the passing beam first condensing part LB2b, and the fourth reflection. The regions 44b and 44b form a traveling beam upper portion HBb above the horizontal line (see FIGS. 8A to 8C).

また、本第２の変形例における車両用前照灯１では、制御部５がミラー３１の揺動範囲（揺動振幅）を第１揺動範囲Ｙ１ｂと第２揺動範囲Ｙ２ｂと第３揺動範囲Ｙ３ｂとに変更可能となっている（図３参照）。このうち第１揺動範囲Ｙ１ｂは、ミラー３１からの反射光を、リフレクタ４Ｂの反射面４０Ｂのうちの第１反射領域４１ｂ及び第２反射領域４２ｂ，４２ｂに亘る第１移動範囲Ｒ１ｂで移動させ、第２揺動範囲Ｙ２ｂは、第１反射領域４１ｂ，第２反射領域４２ｂ，４２ｂ及び第３反射領域４３ｂ，４３ｂに亘る第２移動範囲Ｒ２ｂで移動させ、第３揺動範囲Ｙ３ｂは、第１反射領域４１ｂ，第２反射領域４２ｂ，４２ｂ，第３反射領域４３ｂ，４３ｂ及び第４反射領域４４ｂ，４４ｂに亘る第３移動範囲Ｒ３ｂで移動させる。   In the vehicle headlamp 1 according to the second modification, the control unit 5 sets the swing range (swing amplitude) of the mirror 31 to the first swing range Y1b, the second swing range Y2b, and the third swing. The movement range can be changed to Y3b (see FIG. 3). Of these, the first swing range Y1b moves the reflected light from the mirror 31 in the first movement range R1b across the first reflection area 41b and the second reflection areas 42b, 42b of the reflection surface 40B of the reflector 4B. The second swing range Y2b is moved in the second movement range R2b across the first reflection region 41b, the second reflection regions 42b and 42b, and the third reflection regions 43b and 43b, and the third swing range Y3b is The first reflection area 41b, the second reflection areas 42b and 42b, the third reflection areas 43b and 43b, and the fourth reflection areas 44b and 44b are moved within a third movement range R3b.

したがって、制御部５がミラー３１を第１揺動範囲Ｙ１ｂで揺動させた場合には、図８（ａ），（ｄ）に示すように、上記実施形態と同様に、すれ違いビーム拡散部ＬＢ１ｂ及びすれ違いビーム第１集光部ＬＢ２ｂからなる第１すれ違いビームＬＰ１ｂが車両前方に形成される。
また、制御部５がミラー３１を第２揺動範囲Ｙ２ｂで揺動させた場合には、図８（ｂ），（ｄ）に示すように、上記実施形態と同様に、すれ違いビーム拡散部ＬＢ１ｂ，すれ違いビーム第１集光部ＬＢ２ｂ及びすれ違いビーム第２集光部ＬＢ３ｂからなる第２すれ違いビームＬＰ２ｂが車両前方に形成される。
また、制御部５がミラー３１を第３揺動範囲Ｙ３ｂで揺動させた場合には、光源２から出射されミラー３１で反射された反射光が第３移動範囲Ｒ３ｂで反射面４０Ｂ上を移動し、図８（ｃ），（ｄ）に示すように、すれ違いビーム拡散部ＬＢ１ｂ，すれ違いビーム第１集光部ＬＢ２ｂ，すれ違いビーム第２集光部ＬＢ３ｂ及び走行ビーム上部ＨＢｂからなる走行ビームＨＰｂが車両前方に形成される。 Therefore, when the control unit 5 swings the mirror 31 within the first swing range Y1b, as shown in FIGS. 8A and 8D, the low beam diffusion unit LB1b as in the above embodiment. And the 1st passing beam LP1b which consists of the passing beam 1st condensing part LB2b is formed in the vehicle forward.
Further, when the control unit 5 swings the mirror 31 within the second swing range Y2b, as shown in FIGS. 8B and 8D, as in the above embodiment, the passing beam diffusing unit LB1b. , A second passing beam LP2b composed of a first passing beam condensing unit LB2b and a second passing beam condensing unit LB3b is formed in front of the vehicle.
Further, when the control unit 5 swings the mirror 31 within the third swing range Y3b, the reflected light emitted from the light source 2 and reflected by the mirror 31 moves on the reflection surface 40B within the third movement range R3b. As shown in FIGS. 8C and 8D, the traveling beam HPb including the passing beam diffusing unit LB1b, the passing beam first focusing unit LB2b, the passing beam second focusing unit LB3b, and the traveling beam upper part HBb is obtained. Formed in front of the vehicle.

このように、本第２の変形例における車両用前照灯１によれば、制御部５がミラー３１の揺動範囲を変更することにより、第１すれ違いビームＬＰ１ｂと第２すれ違いビームＬＰ２ｂと走行ビームＨＰｂとに配光パターンを変更することができる。   Thus, according to the vehicle headlamp 1 in the second modified example, the control unit 5 changes the swing range of the mirror 31 so that it travels with the first passing beam LP1b and the second passing beam LP2b. The light distribution pattern can be changed to the beam HPb.

なお、本発明は上記実施形態及びその変形例に限定して解釈されるべきではなく、適宜変更・改良が可能であることはもちろんである。   It should be noted that the present invention should not be construed as being limited to the above-described embodiment and its modifications, and of course can be modified or improved as appropriate.

例えば、上記実施形態及びその変形例では、ミラー３１の揺動周波数が一定に保たれるものとしたが、ミラー３１の揺動範囲とともに揺動周波数を変更させてもよい。   For example, in the above-described embodiment and its modification, the oscillation frequency of the mirror 31 is kept constant, but the oscillation frequency may be changed together with the oscillation range of the mirror 31.

また、ミラーデバイス３は、往復揺動可能なミラー３１を有するものであればよく、いわゆるＭＥＭＳミラーやポリゴンミラーであってもよい。   Moreover, the mirror device 3 should just have the mirror 31 which can reciprocately swing, and may be what is called a MEMS mirror and a polygon mirror.

１ 車両用前照灯
２ 光源
３ ミラーデバイス
３１ ミラー
４，４Ａ，４Ｂ リフレクタ
４０，４０Ａ，４０Ｂ 反射面
４１，４１ａ，４１ｂ 第１反射領域
４２，４２ａ，４２ｂ 第２反射領域
４３，４３ａ，４３ｂ 第３反射領域
４４ｂ 第４反射領域
５ 制御部
ＬＰ１，ＬＰ１ｂ 第１すれ違いビーム
ＬＰ２，ＬＰ２ｂ 第２すれ違いビーム
ＬＰａ すれ違いビーム
ＨＰａ，ＨＰｂ 走行ビーム
Ｒ１，Ｒ１ａ，Ｒ１ｂ 第１移動範囲
Ｒ２，Ｒ２ａ，Ｒ２ｂ 第２移動範囲
Ｒ３ｂ 第３移動範囲
Ｙ１，Ｙ１ａ，Ｙ１ｂ 第１揺動範囲
Ｙ２，Ｙ２ａ，Ｙ２ｂ 第２揺動範囲
Ｙ３ｂ 第３揺動範囲 DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Light source 3 Mirror device 31 Mirror 4, 4A, 4B Reflectors 40, 40A, 40B Reflective surface 41, 41a, 41b 1st reflective area 42, 42a, 42b 2nd reflective area 43, 43a, 43b 1st 3 reflection area 44b 4th reflection area 5 Control part LP1, LP1b 1st passing beam LP2, LP2b 2nd passing beam LPa Passing beam HPa, HPb Traveling beam R1, R1a, R1b 1st moving range R2, R2a, R2b 2nd moving Range R3b Third movement range Y1, Y1a, Y1b First swing range Y2, Y2a, Y2b Second swing range Y3b Third swing range

Claims (3)

光源と、
正弦波周期で往復揺動しつつ前記光源からの光を反射させるミラーと、
前記光源から出射され前記ミラーで反射された反射光を車両前方へ反射させるリフレクタと、
前記ミラーの揺動範囲を制御可能な制御部と、
を備え、車両前方に配光パターンを形成する車両用前照灯であって、
前記リフレクタの反射面は、当該反射面上で前記反射光が移動する方向に沿って長尺に形成されるとともに、この長尺方向に沿って複数の反射領域に分割されており、
前記複数の反射領域は、前記長尺方向の中央の第１反射領域と、当該第１反射領域に隣接する第２反射領域と、当該第２反射領域よりも端部側に位置する第３反射領域とを含み、
前記第１反射領域は、前記ミラーの揺動に伴う当該ミラーからの反射光を左右へ拡散させて、車両前方に拡散配光照射域を形成し、
前記第２反射領域及び前記第３反射領域は、前記ミラーの揺動に伴う当該ミラーからの反射光を前記拡散配光照射域よりも左右中央に個別に集光させて、車両前方に第１集光配光照射域及び第２集光配光照射域を形成し、
前記制御部は、前記ミラーの揺動範囲を変更することにより、当該ミラーの揺動に伴って前記リフレクタの反射面上で前記ミラーからの反射光が移動する範囲を変更させて、前記配光パターンを第１配光パターンと第２配光パターンとに変更可能であり、
前記第１配光パターンは、前記ミラーからの反射光が前記第１反射領域及び前記第２反射領域に亘って移動することにより、前記拡散配光照射域及び前記第１集光配光照射域が重畳されてなるものであり、
前記第２配光パターンは、前記ミラーからの反射光が前記第１反射領域、前記第２反射領域及び前記第３反射領域に亘って移動することにより、前記拡散配光照射域、前記第１集光配光照射域及び前記第２集光配光照射域が重畳されてなるものであることを特徴とする車両用前照灯。 A light source;
A mirror Ru reflects the light from the light source while reciprocally swung by a sine wave cycle,
A reflector that reflects the reflected light emitted from the light source and reflected by the mirror forward of the vehicle;
A control unit capable of controlling the swing range of the mirror;
A vehicle headlamp that forms a light distribution pattern in front of the vehicle,
The reflective surface of the reflector is formed long along the direction in which the reflected light moves on the reflective surface, and is divided into a plurality of reflective regions along the long direction,
The plurality of reflection areas include a first reflection area in the center in the longitudinal direction, a second reflection area adjacent to the first reflection area, and a third reflection located closer to the end than the second reflection area. Area and
The first reflection region diffuses reflected light from the mirror accompanying the swing of the mirror to the left and right to form a diffused light distribution irradiation region in front of the vehicle,
The second reflection area and the third reflection area first collect the reflected light from the mirror accompanying the swinging of the mirror separately in the center of the left and right sides of the diffused light distribution irradiation area, and the first reflection area is first in front of the vehicle. Forming a focused light distribution irradiation area and a second focused light distribution irradiation area;
Wherein, by changing the swinging range of the mirror, by changing the range in which reflected light travels from the mirror on the reflecting surface of the reflector with the swinging of the mirror, the light distribution The pattern can be changed to a first light distribution pattern and a second light distribution pattern,
In the first light distribution pattern, reflected light from the mirror moves across the first reflection region and the second reflection region, so that the diffused light distribution irradiation region and the first light collection light distribution irradiation region. Are superimposed,
In the second light distribution pattern, the reflected light from the mirror moves over the first reflection region, the second reflection region, and the third reflection region, whereby the diffused light distribution irradiation region, the first light distribution pattern, A vehicular headlamp characterized in that a condensing light distribution irradiation region and the second condensing light distribution irradiation region are superimposed . 前記第１反射領域、前記第２反射領域及び前記第３反射領域は、前記ミラーからの反射光を主に水平線よりも下側に向けて個別に照射して、前記拡散配光照射域、前記第１集光配光照射域及び前記第２集光配光照射域を形成し、
前記第３反射領域は、前記ミラーからの反射光を前記第１集光配光照射域よりも左右中央に集光させて、前記第２集光配光照射域を形成し、
前記第１配光パターン及び前記第２配光パターンが何れもすれ違い用配光パターンであることを特徴とする請求項１に記載の車両用前照灯。 The first reflection region, the second reflection region, and the third reflection region individually irradiate reflected light from the mirror mainly downward below a horizontal line, and the diffused light distribution irradiation region, Forming a first focused light distribution irradiation area and a second focused light distribution irradiation area;
The third reflection region condenses the reflected light from the mirror in the center of the left and right of the first light collection light distribution irradiation region to form the second light collection light distribution irradiation region,
2. The vehicle headlamp according to claim 1, wherein each of the first light distribution pattern and the second light distribution pattern is a passing light distribution pattern . 前記第１反射領域及び前記第２反射領域は、前記ミラーからの反射光を主に水平線よりも下側に向けて個別に照射して、前記拡散配光照射域及び前記第１集光配光照射域を形成し、
前記第３反射領域は、前記ミラーからの反射光を主に水平線よりも上側に向けて照射して、前記第２集光配光照射域を形成し、
前記第１配光パターンがすれ違い用配光パターンであり、前記第２配光パターンが走行用配光パターンであることを特徴とする請求項１に記載の車両用前照灯。 The first reflection region and the second reflection region individually irradiate reflected light from the mirror mainly downward below a horizontal line, and the diffuse light distribution irradiation region and the first light collection light distribution. Form an irradiation area,
The third reflection region irradiates reflected light from the mirror mainly upward from the horizontal line to form the second focused light distribution irradiation region,
The vehicle headlamp according to claim 1 , wherein the first light distribution pattern is a passing light distribution pattern, and the second light distribution pattern is a traveling light distribution pattern .
JP2010226198A 2010-10-06 2010-10-06 Vehicle headlamp Active JP5612996B2 (en)

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