JP2003086009A - Headlamp for vehicle - Google Patents
Headlamp for vehicleInfo
- Publication number
- JP2003086009A JP2003086009A JP2001272464A JP2001272464A JP2003086009A JP 2003086009 A JP2003086009 A JP 2003086009A JP 2001272464 A JP2001272464 A JP 2001272464A JP 2001272464 A JP2001272464 A JP 2001272464A JP 2003086009 A JP2003086009 A JP 2003086009A
- Authority
- JP
- Japan
- Prior art keywords
- light
- vehicle headlamp
- reflecting surface
- light source
- unit
- 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.)
- Granted
Links
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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/322—Optical layout thereof the reflector using total internal reflection
-
- 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
- F21S41/24—Light guides
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ヘッドランプ、フ
ォグランプなど車両用前照灯の構成に関するものであ
り、詳細にはプロジェクタ型を基本構成とし、光源に対
する光束利用率を向上させて、一層に明るい車両用前照
灯の実現を可能とする構成の提供を目的とするものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headlamp such as a head lamp or a fog lamp. More specifically, it is based on a projector type and has an improved luminous flux utilization rate with respect to a light source. An object of the present invention is to provide a configuration that enables a bright vehicle headlight to be realized.
【０００２】[0002]
【従来の技術】従来のこの種の車両用前照灯９０の構成
をプロジェクタ式の例で示すものが図６であり、この車
両用前照灯９０は、光源９１と、この光源９１に第一焦
点を一致させる楕円反射面９２と、前記楕円反射面９２
の第二焦点ｆ２の近傍に設置されるシャッタ９３と、投
影レンズ９４とから構成されている。2. Description of the Related Art FIG. 6 shows a configuration of a conventional vehicle headlamp 90 of this type in a projector type. The vehicle headlamp 90 includes a light source 91 and a light source 91. The elliptical reflecting surface 92 for making one focal point coincide with each other, and the elliptic reflecting surface 92.
The second focus f2 includes a shutter 93 and a projection lens 94.
【０００３】上記のように構成された車両用前照灯９０
においては、光源９１からの光の内の楕円反射面９２に
反射した光は第二焦点ｆ２に収束するものとなり、その
収束途上で略下半部がシャッタ９３により遮蔽され、投
影レンズ９４で照射方向に投射が行われるときに上向き
光となる成分が取り除かれる。よって、この車両用前照
灯９０からの照射光には、基本的に上向き光を含むこと
のないすれ違い配光が得られるものとなる。A vehicle headlamp 90 constructed as described above.
In the above, in the light from the light source 91, the light reflected by the elliptical reflecting surface 92 is focused on the second focus f2, and the substantially lower half portion is shielded by the shutter 93 during the convergence, and is irradiated by the projection lens 94. The component that becomes the upward light when the projection is performed in the direction is removed. Therefore, the light emitted from the vehicle headlamp 90 basically provides a passing light distribution that does not include upward light.
【０００４】尚、図示は省略するが上記楕円反射面９２
に換えて回転放物面など放物反射面を採用した構成の車
両用前照灯も存在するが、光源９１に対する光束捕捉率
は、一般的には楕円反射面９２を採用した車両用前照灯
９０の方が高く、より明るい車両用前照灯の実現が可能
であると言われている。Although not shown, the elliptical reflecting surface 92 is not shown.
There is also a vehicular headlamp having a configuration in which a parabolic reflection surface such as a rotating parabolic surface is adopted instead, but the luminous flux capture rate for the light source 91 is generally a vehicular headlamp that employs an elliptical reflection surface 92. The light 90 is higher, and it is said that a brighter vehicle headlight can be realized.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
た従来の構成の車両用前照灯９０においては、前記楕円
反射面９２の光源９１に対する光束捕捉率は６５％程度
であり、また、前記シャッタ９３ではほぼ半分の光量が
遮蔽されものであるので、投影レンズ９４には光源９１
からの光の内の約３５％が達するに過ぎない。また、上
記に加えて楕円反射面９２の反射効率（約８５％）、前
記投影レンズ９４の透過効率（約７５％）なども影響す
るので、実際に照射光として使用されるのは、光源９１
からの光の内の僅かに２３％程度に過ぎず、あまりに低
効率に過ぎるという問題点を生じている。However, in the vehicular headlamp 90 having the above-described conventional structure, the luminous flux capture rate of the elliptical reflecting surface 92 with respect to the light source 91 is about 65%, and the shutter 93 is used. Since almost half of the light amount is blocked by, the projection lens 94 has a light source 91
Only about 35% of the light from is reached. Further, in addition to the above, the reflection efficiency of the elliptical reflection surface 92 (about 85%), the transmission efficiency of the projection lens 94 (about 75%) and the like also affect, so that the light source 91 is actually used as the irradiation light.
Only about 23% of the light emitted from the light source has a problem of being too low in efficiency.
【０００６】[0006]
【課題を解決するための手段】本発明は上記した従来の
課題を解決するための具体的手段として、光源と、この
光源に第一焦点を有する楕円反射面と、前記楕円反射面
の第二焦点の近傍に配置されるシャッタと、前記シャッ
タの近傍に焦点を有する投影レンズとから成るプロジェ
クタユニットを有する車両用前照灯であり、前記楕円反
射面の照射方向前方であり、前記楕円反射面およびこの
反射面からの反射光、前記シャッタ、前記投影レンズと
に干渉を生じない位置には、前記光源からの直射光を受
光し略平行光線に変換して内部に取り込む受光レンズ部
と、前記受光レンズ部からの光をこの車両用前照灯の照
射方向に向けて内面反射する内面反射部と、前記内面反
射部からの反射光をこの車両用前照灯の照射方向に向か
う光として外部に射出する出射面部とが一体の透明部材
で形成された補助レンズユニットが前記プロジェクタユ
ニットを取り囲むようにして設けられていることを特徴
とする車両用前照灯を提供することで課題を解決するも
のである。As a concrete means for solving the above-mentioned conventional problems, the present invention provides a light source, an elliptical reflecting surface having a first focus on the light source, and a second ellipse reflecting surface. A vehicular headlamp having a projector unit composed of a shutter arranged in the vicinity of a focal point and a projection lens having a focal point in the vicinity of the shutter, which is ahead of the elliptical reflecting surface in the irradiation direction, and is in the elliptic reflecting surface. And a light-receiving lens portion that receives the direct light from the light source, converts it into substantially parallel light rays, and takes in the light internally, at a position that does not interfere with the reflected light from the reflecting surface, the shutter, and the projection lens, An inner reflection portion that internally reflects the light from the light-receiving lens portion toward the irradiation direction of the vehicle headlamp, and the reflected light from the inner reflection portion as light traveling in the irradiation direction of the vehicle headlamp. To An object of the present invention is to provide a vehicle headlamp, characterized in that an auxiliary lens unit, which is formed of a transparent member integrated with an outgoing emission surface portion, is provided so as to surround the projector unit. Is.
【０００７】[0007]
【発明の実施の形態】つぎに、本発明を図に示す実施形
態に基づいて詳細に説明する。図１及び図２に符号１で
示すものは本発明に係る車両用前照灯であり、この車両
用前照灯１は、光源２と、この光源２に第一焦点を一致
させている楕円反射面３と、前記楕円反射面３の第二焦
点ｆ２の近傍に設けられるシャッタ４と、シャッタ４の
近傍に焦点を有する投影レンズ５とからなるプロジェク
タユニット６と、補助レンズユニット７とから構成され
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on the embodiments shown in the drawings. Reference numeral 1 in FIGS. 1 and 2 is a vehicle headlamp according to the present invention. The vehicle headlamp 1 includes a light source 2 and an ellipse whose first focal point is aligned with the light source 2. It is composed of a reflecting surface 3, a projector unit 6 including a shutter 4 provided in the vicinity of the second focus f2 of the elliptical reflecting surface 3, a projection lens 5 having a focus in the vicinity of the shutter 4, and an auxiliary lens unit 7. Has been done.
【０００８】尚、前記プロジェクタユニット６について
は、従来例で説明したのとほぼ同様な構成であるので、
本発明における特有な構成の部分を除いては、その詳細
な説明を省略する。本発明では前記プロジェクタユニッ
ト６の前記楕円反射面３は中心軸Ｘ方向への深さを浅く
設定され、従来例のものが光源２からの光量を６５％程
度捕捉するものとされていたのに対し、本発明では３０
〜５０％程度捕捉するものとされている。Since the projector unit 6 has substantially the same structure as that described in the conventional example,
Detailed description thereof will be omitted except for the specific configuration of the present invention. In the present invention, the elliptical reflecting surface 3 of the projector unit 6 is set to have a shallow depth in the central axis X direction, and the conventional example captures about 65% of the light amount from the light source 2. On the other hand, in the present invention, 30
It is supposed to capture about 50%.
【０００９】ここで、前記楕円反射面３からの反射光が
第二焦点ｆ２に収束するときの状態を光源２の大きさを
無視して考察すれば、その光束は第二焦点ｆ２を頂点と
し、楕円反射面３の外径を底面とする円錐状である。こ
のときに楕円反射面３の深さを浅くしていくと、前記し
た円錐状の頂角は狭くなる。Now, considering the state when the reflected light from the elliptical reflecting surface 3 converges on the second focal point f2, ignoring the size of the light source 2, the luminous flux has the second focal point f2 as its apex. The elliptical reflecting surface 3 has a conical shape whose bottom surface is the outer diameter. At this time, if the depth of the elliptical reflecting surface 3 is made shallower, the above-mentioned conical apex angle becomes narrower.
【００１０】上記の円錐状の頂角が狭くなるということ
を、図２に示す状態で考察すれば、第二焦点ｆ２に収束
するときの上向き光の角度が減じるということであり、
即ち、車両用前照灯１としての照射光中から上向き光の
成分が減ることとなる。よって、楕円反射面３の深さを
減らしたことで、シャッタ４により遮蔽を行わざるを得
ない上向き光の割合が減じ、楕円反射面３からの反射光
に対し、照射光として利用できる割合が増えるものとな
る。Considering that the conical apex angle becomes narrow in the state shown in FIG. 2, it means that the angle of the upward light when converging to the second focal point f2 is reduced,
That is, the upward light component is reduced from the irradiation light as the vehicle headlamp 1. Therefore, by reducing the depth of the elliptical reflecting surface 3, the proportion of upward light that cannot be shielded by the shutter 4 is reduced, and the proportion of the reflected light from the elliptical reflecting surface 3 that can be used as irradiation light is reduced. It will increase.
【００１１】ちなみに、従来のプロジェクタ型の楕円反
射面では、上記にも説明したように光源からの光の６５
％を捕捉するものとし、その約半分をシャッタにより遮
蔽していたので、約３６％が照射光として利用されるも
のとなっていたが、本発明により楕円反射面３を浅く設
定し捕捉率を５０％、或いは、それ以下（例えば３０
％）と設定したことでシャッタ４による遮蔽率は約３０
％に低減し、捕捉率が５０％の場合約３５％が、捕捉率
が３０％の場合でも約２２％が照射光として利用される
ものとなった。但し、上記の数値は、何れも楕円反射面
３の反射効率（約８５％）、投影レンズ５の透過効率
（約７５％）は除いてある。Incidentally, in the conventional projector-type elliptical reflecting surface, as described above, the light from the light source 65
%, And about half of it was shielded by the shutter, so about 36% was used as irradiation light. However, according to the present invention, the elliptical reflecting surface 3 is set to be shallow and the trapping rate is set. 50% or less (eg 30
%), The shutter ratio of the shutter 4 is about 30.
%, About 35% was used as the irradiation light when the capture rate was 50%, and about 22% was used even when the capture rate was 30%. However, the above numerical values exclude the reflection efficiency of the elliptical reflecting surface 3 (about 85%) and the transmission efficiency of the projection lens 5 (about 75%).
【００１２】即ち、本発明によれば楕円反射面３を浅く
設定したにもかかわらず、プロジェクタユニット６の投
影レンズ５から照射方向に投射される光量は従来のもの
からそれ程に低下していないものとなる。同時に前記楕
円反射面３を浅く設定したことで、光源２からの光の楕
円反射面３に捕捉されないものの割合が増えるので、本
発明では、楕円反射面３に捕捉されない光を補助レンズ
ユニット７で回収し照射光として使用するのである。That is, according to the present invention, the amount of light projected in the irradiation direction from the projection lens 5 of the projector unit 6 has not decreased so much from the conventional one, although the elliptical reflecting surface 3 is set shallow. Becomes At the same time, by setting the elliptical reflection surface 3 shallow, the proportion of light from the light source 2 that is not captured by the elliptical reflection surface 3 increases. Therefore, in the present invention, the light that is not captured by the elliptical reflection surface 3 is generated by the auxiliary lens unit 7. It is recovered and used as irradiation light.
【００１３】前記補助レンズユニット７は、前記楕円反
射面３の照射方向前方に設けられるものであり、このと
きには、楕円反射面３からの反射光が第二焦点ｆ２に収
束する光路と干渉することがなく、また、シャッタ４、
投影レンズ５と位置的な干渉を生じないように設けられ
る。The auxiliary lens unit 7 is provided in front of the elliptical reflecting surface 3 in the irradiation direction, and at this time, the reflected light from the elliptic reflecting surface 3 interferes with the optical path that converges on the second focal point f2. And the shutter 4,
It is provided so as not to cause positional interference with the projection lens 5.
【００１４】そして、補助レンズユニット７には、光源
２からの直射光を受光し、この補助レンズユニット７が
形成された部材の内部で所定の方向へ向かう平行光線に
変換する受光レンズ部７１と、前記受光レンズ部７１か
らの光の進行方向側に設けられ、この光の進路を車両用
前照灯１の照射方向に変換する内面反射部７２と、前記
内面反射部７２を灯具外部に射出する出射面部７３とが
設けられている。The auxiliary lens unit 7 receives a direct light from the light source 2 and converts it into a parallel light beam traveling in a predetermined direction inside the member in which the auxiliary lens unit 7 is formed. The inner reflection portion 72, which is provided on the traveling direction side of the light from the light receiving lens portion 71 and converts the path of this light to the irradiation direction of the vehicle headlamp 1, and the inner reflection portion 72 is emitted to the outside of the lamp. And an emission surface portion 73 that operates.
【００１５】即ち、この補助レンズユニット７は、受光
レンズ部７１から出射面部７３までが一体の透明部材で
形成され、上記した平行光線の内面反射部７２での反射
は補助レンズユニット７が形成された樹脂など高屈折部
材（屈折率＝略１．５）と大気（屈折率＝１．０）との
境界面で行われている。That is, in the auxiliary lens unit 7, the light receiving lens portion 71 to the emission surface portion 73 are formed of an integral transparent member, and the reflection of the parallel light rays by the inner surface reflection portion 72 is formed by the auxiliary lens unit 7. It is performed at the boundary surface between a high refractive member such as resin (refractive index = approximately 1.5) and the atmosphere (refractive index = 1.0).
【００１６】ここで、前記補助レンズユニット７の全体
形状について説明を行えば、光源２は基本的には全方位
に光を発しているものであるので、図２に断面で示した
形状を車両用前照灯１の中心軸Ｘを軸として回転させた
形状が、光源２に対しての光束捕捉率を高く設定できる
ものとなる。よって、本発明でも前記の形状として補助
レンズユニット７を形成している。Now, the overall shape of the auxiliary lens unit 7 will be described. Since the light source 2 basically emits light in all directions, the shape shown in cross section in FIG. The shape rotated around the central axis X of the vehicle headlamp 1 makes it possible to set a high luminous flux capture rate for the light source 2. Therefore, also in the present invention, the auxiliary lens unit 7 is formed in the above shape.
【００１７】以上の説明のように本発明により、１つの
光源２に対して楕円反射面３と補助レンズユニット７と
を設けたことで、両者３、７に適宜な割合で光を配分す
る必要が生じる。ここで、発明者の検討の結果による
と、プロジェクタユニット６と補助レンズユニット７と
は、シャッタ４が設けられないこともあり補助レンズユ
ニット７の方が光効率であることが確認された。As described above, by providing the elliptical reflecting surface 3 and the auxiliary lens unit 7 for one light source 2 according to the present invention, it is necessary to distribute the light to the both 3 and 7 at an appropriate ratio. Occurs. Here, according to the result of examination by the inventor, it was confirmed that the projector unit 6 and the auxiliary lens unit 7 were not provided with the shutter 4 and thus the auxiliary lens unit 7 had higher light efficiency.
【００１８】よって、本発明では、当初の目的であるで
きるだけ明るい車両用前照灯１の実現に沿うべく、光源
２からの光の配布割合を、プロジェクタユニット６＝３
０％、補助レンズユニット７＝６５％と設定した。尚、
本発明は上記の配布割合を限定するものではなく、例え
ば、配光の形状を重視するなど車両用前照灯１に期待す
る目的により自由に設定することが可能である。Therefore, in the present invention, the distribution ratio of the light from the light source 2 is set to the projector unit 6 = 3 in order to achieve the original purpose of realizing the brightest vehicle headlamp 1.
It was set to 0% and the auxiliary lens unit 7 = 65%. still,
The present invention does not limit the distribution ratio described above, and can be freely set depending on the purpose expected of the vehicle headlamp 1, for example, by emphasizing the shape of the light distribution.
【００１９】このようにしたことで、前記プロジェクタ
ユニット６は光源２からの光の約１４％を照射光として
投射するものとなり、補助レンズユニット７は光源２か
らの光の約４９％を照射光として投射するものとなり、
合計では６３％の光が照射光として利用されるものとな
った。これを、従来例の車両用前照灯の効率２３％と比
較すれば、本願発明の車両用前照灯は２．５倍以上明る
いものとなり、視認性の向上に顕著な効果を奏するもの
である。By doing so, the projector unit 6 projects about 14% of the light from the light source 2 as irradiation light, and the auxiliary lens unit 7 emits about 49% of the light from the light source 2. Will be projected as
In total, 63% of light was used as irradiation light. Comparing this with the efficiency of 23% of the conventional vehicle headlamp, the vehicle headlamp of the present invention is 2.5 times or more brighter, which is a remarkable effect in improving the visibility. is there.
【００２０】図３は本発明に係る車両用前照灯１におけ
る配光特性（すれ違い配光）Ｄの例を示すものであり、
例えば左側通行における左側の路側を照射するための１
５゜左上がりの傾斜として形成されるエルボ部分など
は、シャッタ４を有して自在に配光形状を設定できるプ
ロジェクタユニット６の側からの配光Ｄ６で形成し、そ
して水平方向に広い範囲を照射する路面照射の部分は光
量の多いよる補助レンズユニット７の側の配光Ｄ７で形
成している。FIG. 3 shows an example of the light distribution characteristic (passing light distribution) D in the vehicle headlamp 1 according to the present invention.
For example, 1 to illuminate the left side of the road on the left
The elbow portion formed as an inclination of 5 ° upward left is formed by the light distribution D6 from the side of the projector unit 6 which has the shutter 4 and can freely set the light distribution shape, and has a wide horizontal range. The irradiation portion of the road surface is formed by the light distribution D7 on the side of the auxiliary lens unit 7 due to the large amount of light.
【００２１】尚、補助レンズユニット７からの光で配光
Ｄ７を形成するためには左右方向に拡散を行わなければ
ならないものとなるので、前記補助レンズユニット７の
出射面部７３に拡散カット７４（図１参照）が設けられ
ている。また、実際の実施に当たり補助レンズユニット
７からの光に上向き光を含まないものとするために、前
記拡散カット７４に加えて下向きに光を屈折させるプリ
ズムカットを重複させるなどは自在である。In order to form the light distribution D7 by the light from the auxiliary lens unit 7, it is necessary to diffuse the light in the left and right directions. Therefore, the diffusion cut 74 ( 1) is provided. In addition, in the actual implementation, in order to make the light from the auxiliary lens unit 7 do not include upward light, it is possible to overlap prism cuts for refracting light downward in addition to the diffusion cut 74.
【００２２】図４は本発明に係る車両用前照灯１の別な
実施形態であり、前の実施形態では前記補助レンズユニ
ット７における受光レンズ部７１は１つの方向へ向かう
平行光線を発生させるための１つの曲面で形成されてい
たが、本発明はこれを限定するものではなく、受光レン
ズ部７１ａと受光レンズ部７１ｂのように２つの方向に
向かう平行光線を発生させる２つの曲面など、複数の曲
面で構成しても良いものである。そして、この場合に
は、当然に車両用前照灯１の照射方向へ光を反射するも
のとなる内面反射部７２も、受光レンズ部７１ａ、７１
ｂに対応し、内面反射部７２ａ、７２ｂの複数となる。FIG. 4 shows another embodiment of the vehicle headlamp 1 according to the present invention. In the previous embodiment, the light receiving lens portion 71 of the auxiliary lens unit 7 generates parallel light rays traveling in one direction. Although the present invention is not limited to this, the present invention is not limited to this, and two curved surfaces that generate parallel rays traveling in two directions, such as the light receiving lens portion 71a and the light receiving lens portion 71b, It may be composed of a plurality of curved surfaces. Then, in this case, the inner reflection part 72, which naturally reflects light in the irradiation direction of the vehicle headlamp 1, also receives the light-receiving lens parts 71a, 71.
Corresponding to b, there are a plurality of internal reflection parts 72a and 72b.
【００２３】図５は本発明の更に別の実施形態であり、
前記補助レンズユニット７の出射面部７３は外部から観
視される部位であり、即ち、この車両用前照灯１のデザ
インに関与する部位である。よって、この出射面部７３
にデザインを整えるための装飾用レンズカット７５を設
けることも自在であるが、このときには前記出射面部７
３から放射される光に無用な屈折を生じさせないこと
が、配光特性の形成の面から必要となる。FIG. 5 shows another embodiment of the present invention.
The emission surface portion 73 of the auxiliary lens unit 7 is a portion viewed from the outside, that is, a portion involved in the design of the vehicle headlamp 1. Therefore, this emission surface portion 73
It is also possible to provide a decorative lens cut 75 for adjusting the design, but at this time, the exit surface 7
It is necessary from the viewpoint of forming the light distribution characteristic that the light emitted from 3 does not cause unnecessary refraction.
【００２４】よって、この実施形態においては、前記車
両用前照灯１の中心軸Ｘに対して直交する面で装飾用レ
ンズカット７５が形成されている。尚、この装飾用レン
ズカット７５は、図示のように水平方向への溝状として
設けられても良く、垂直方向への溝状、斜め方向への溝
状、或いは、同心円の溝状などとしても良いものであ
る。また、前記拡散カット７４との重複も自在である。Therefore, in this embodiment, the decorative lens cut 75 is formed on the surface orthogonal to the central axis X of the vehicle headlamp 1. The decorative lens cut 75 may be provided in the shape of a groove in the horizontal direction as illustrated, or may be formed in the shape of a groove in the vertical direction, the shape of a groove in the oblique direction, or the shape of concentric circles. It is a good one. It is also possible to overlap with the diffusion cut 74.
【００２５】[0025]
【発明の効果】以上に説明したように本発明により、光
源と、この光源に第一焦点を有する楕円反射面と、前記
楕円反射面の第二焦点の近傍に配置されるシャッタと、
前記シャッタの近傍に焦点を有する投影レンズとから成
るプロジェクタユニットを有する車両用前照灯であり、
前記楕円反射面の照射方向前方であり、前記楕円反射面
およびこの反射面からの反射光、前記シャッタ、前記投
影レンズとに干渉を生じない位置には、前記光源からの
直射光を受光し略平行光線に変換して内部に取り込む受
光レンズ部と、前記受光レンズ部からの光をこの車両用
前照灯の照射方向に向けて内面反射する内面反射部と、
前記内面反射部からの反射光をこの車両用前照灯の照射
方向に向かう光として外部に射出する出射面部とが一体
の透明部材で形成された補助レンズユニットが前記プロ
ジェクタユニットを取り囲むようにして設けられている
車両用前照灯としたことで、補助レンズユニットで光源
からの直射光も回収できるものとして従来のこの種の車
両用前照灯に対して光束利用率を２．５倍以上と格段に
向上させ、視認性の向上など性能の向上に極めて優れた
効果を奏するものである。As described above, according to the present invention, a light source, an elliptical reflecting surface having a first focus on the light source, and a shutter arranged near the second focal point of the elliptical reflecting surface,
A vehicle headlamp having a projector unit including a projection lens having a focus near the shutter,
In front of the irradiation direction of the ellipsoidal reflection surface, reflected light from the ellipsoidal reflection surface and the reflection surface, the shutter, at a position that does not interfere with the projection lens, to receive the direct light from the light source, A light-receiving lens portion that converts the light into parallel rays and takes it into the interior, and an inner-surface reflecting portion that internally reflects the light from the light-receiving lens portion toward the irradiation direction of the vehicle headlamp,
An auxiliary lens unit formed of a transparent member integrally formed with an emission surface portion that emits reflected light from the inner surface reflection portion to the outside as light traveling in the irradiation direction of the vehicle headlamp is arranged to surround the projector unit. Since it is a vehicle headlamp that is provided, it is possible to collect direct light from the light source with the auxiliary lens unit, and the luminous flux utilization rate is 2.5 times or more compared to the conventional vehicle headlamp of this type. It is remarkably improved, and it is extremely effective in improving performance such as improvement in visibility.
【図１】 本発明に係る車両用前照灯の実施形態を示す
正面図である。FIG. 1 is a front view showing an embodiment of a vehicle headlamp according to the present invention.
【図２】 図１のＡ−Ａ線に沿う断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG.
【図３】 本発明に係る車両用前照灯の配光特性を示す
説明図である。FIG. 3 is an explanatory diagram showing a light distribution characteristic of the vehicle headlamp according to the present invention.
【図４】 同じく本発明に係る車両用前照灯の別の実施
形態を要部で示す断面図である。FIG. 4 is a sectional view showing another embodiment of the vehicle headlight according to the present invention as a main part.
【図５】 同じく本発明に係る車両用前照灯の更に別の
実施形態を要部で示す斜視図である。FIG. 5 is a perspective view showing still another embodiment of the vehicle headlamp according to the present invention as a main part.
【図６】 従来例を示す断面図である。FIG. 6 is a cross-sectional view showing a conventional example.
１……車両用前照灯 ２……光源 ３……楕円反射面 ４……シャッタ ５……投影レンズ ６……プロジェクタユニット ７……補助レンズユニット ７１……受光レンズ部 ７２……内面反射部 ７３……出射面部 ７４……拡散カット ７５……装飾用レンズカット 1 ... Vehicle headlight 2 ... Light source 3 ... Elliptical reflective surface 4 ... Shutter 5 ... Projection lens 6 ... Projector unit 7 ... Auxiliary lens unit 71 ... Receiving lens section 72 ... Inner reflection part 73 ... Emitting surface 74 …… Diffusion cut 75 …… Lens cut for decoration
Claims (3)
円反射面と、前記楕円反射面の第二焦点の近傍に配置さ
れるシャッタと、前記シャッタの近傍に焦点を有する投
影レンズとから成るプロジェクタユニットを有する車両
用前照灯であり、前記楕円反射面の照射方向前方であ
り、前記楕円反射面およびこの反射面からの反射光、前
記シャッタ、前記投影レンズとに干渉を生じない位置に
は、前記光源からの直射光を受光し略平行光線に変換し
て内部に取り込む受光レンズ部と、前記受光レンズ部か
らの光をこの車両用前照灯の照射方向に向けて内面反射
する内面反射部と、前記内面反射部からの反射光をこの
車両用前照灯の照射方向に向かう光として外部に射出す
る出射面部とが一体の透明部材で形成された補助レンズ
ユニットが前記プロジェクタユニットを取り囲むように
して設けられていることを特徴とする車両用前照灯。1. A light source, an elliptical reflecting surface having a first focus on the light source, a shutter arranged near the second focus of the elliptical reflecting surface, and a projection lens having a focus near the shutter. A vehicle headlamp having a projector unit, which is in front of the elliptical reflecting surface in the irradiation direction, and which does not interfere with the elliptical reflecting surface and the reflected light from the reflecting surface, the shutter, and the projection lens. Is a light-receiving lens portion that receives direct light from the light source, converts it into substantially parallel rays, and takes it into the interior, and internally reflects the light from the light-receiving lens portion toward the irradiation direction of the vehicle headlamp. The auxiliary lens unit in which the inner reflection portion and the emission surface portion that emits the reflected light from the inner reflection portion to the outside as light traveling in the irradiation direction of the vehicle headlamp are formed by a transparent member A vehicle headlamp, which is provided so as to surround the vector unit.
は前記プロジェクタユニットの光軸に対し少なくとも一
つの傾き角を有する略コーン状の平行光線を前記内面反
射部に向かわせる略リング状であることを特徴とする請
求項１記載の車両用前照灯。2. The light-receiving lens portion of the auxiliary lens unit has a substantially ring shape that directs substantially cone-shaped parallel rays having at least one inclination angle with respect to the optical axis of the projector unit toward the inner surface reflection portion. The vehicle headlamp according to claim 1, which is characterized in that.
この車両用前照灯の配光特性を形成するため、及び／ま
たは、この車両用前照灯のデザインを整えるためのレン
ズカットが施されていることを特徴とする請求項１また
は請求項２記載の車両用前照灯。3. A lens cut is formed on an emission surface of the auxiliary lens unit to form a light distribution characteristic of the vehicle headlamp and / or to arrange a design of the vehicle headlamp. The vehicle headlamp according to claim 1 or 2, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001272464A JP4565603B2 (en) | 2001-09-07 | 2001-09-07 | Vehicle headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001272464A JP4565603B2 (en) | 2001-09-07 | 2001-09-07 | Vehicle headlamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003086009A true JP2003086009A (en) | 2003-03-20 |
| JP4565603B2 JP4565603B2 (en) | 2010-10-20 |
Family
ID=19097832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001272464A Expired - Fee Related JP4565603B2 (en) | 2001-09-07 | 2001-09-07 | Vehicle headlamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4565603B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2856774A1 (en) * | 2003-06-24 | 2004-12-31 | Valeo Vision | Head light for motor vehicle, has reflecting units with optical surface placed relative to outlet side of dioptric units, and reflecting channelized upper portion of light beam towards front, on rear side of protecting lens |
| EP1500872A2 (en) * | 2003-07-25 | 2005-01-26 | Automotive Lighting Italia Spa | Vehicle lighting device with an annular reflector, and relative improved reflector |
| FR2878020A1 (en) * | 2004-11-18 | 2006-05-19 | Valeo Vision Sa | LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE PRODUCING A BEAM ON THE SIDE OF A MOTOR VEHICLE |
| JP2007103212A (en) * | 2005-10-05 | 2007-04-19 | Honda Motor Co Ltd | Vehicular headlamp structure |
| JP2009104933A (en) * | 2007-10-24 | 2009-05-14 | Stanley Electric Co Ltd | Direct projection type illumination lamp |
| JP2010080306A (en) * | 2008-09-26 | 2010-04-08 | Stanley Electric Co Ltd | Lighting fixture unit for vehicular headlight |
| JP2012142158A (en) * | 2010-12-28 | 2012-07-26 | Stanley Electric Co Ltd | Projector type headlight for motorcycle |
| JP5855258B2 (en) * | 2012-09-07 | 2016-02-09 | 三菱電機株式会社 | Vehicle headlamp device |
| JP2016517162A (en) * | 2013-05-08 | 2016-06-09 | チザラ リヒトシステーメ ゲーエムベーハーＺｉｚａｌａ Ｌｉｃｈｔｓｙｓｔｅｍｅ ＧｍｂＨ | Automotive lighting system |
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| JPH11329007A (en) * | 1998-04-01 | 1999-11-30 | Robert Bosch Gmbh | Projector type head light for vehicle |
| JP2000003607A (en) * | 1998-06-12 | 2000-01-07 | Honda Motor Co Ltd | Headlamp for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0684601U (en) * | 1993-05-18 | 1994-12-02 | スタンレー電気株式会社 | Projector lamp |
| JPH11329007A (en) * | 1998-04-01 | 1999-11-30 | Robert Bosch Gmbh | Projector type head light for vehicle |
| JP2000003607A (en) * | 1998-06-12 | 2000-01-07 | Honda Motor Co Ltd | Headlamp for vehicle |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2856774A1 (en) * | 2003-06-24 | 2004-12-31 | Valeo Vision | Head light for motor vehicle, has reflecting units with optical surface placed relative to outlet side of dioptric units, and reflecting channelized upper portion of light beam towards front, on rear side of protecting lens |
| EP1500872A2 (en) * | 2003-07-25 | 2005-01-26 | Automotive Lighting Italia Spa | Vehicle lighting device with an annular reflector, and relative improved reflector |
| EP1500872A3 (en) * | 2003-07-25 | 2005-07-20 | Automotive Lighting Italia Spa | Vehicle lighting device with an annular reflector, and relative improved reflector |
| FR2878020A1 (en) * | 2004-11-18 | 2006-05-19 | Valeo Vision Sa | LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE PRODUCING A BEAM ON THE SIDE OF A MOTOR VEHICLE |
| EP1659334A1 (en) * | 2004-11-18 | 2006-05-24 | Valeo Vision | Lighting and/or signaling device for automobile generating a light beam on the side of the automotive vehicle |
| US8602617B2 (en) | 2004-11-18 | 2013-12-10 | Valeo Vision | Lighting and/or signaling device for a motor vehicle producing a light beam on the side of a motor vehicle |
| JP4563912B2 (en) * | 2005-10-05 | 2010-10-20 | 本田技研工業株式会社 | Vehicle headlamp structure |
| JP2007103212A (en) * | 2005-10-05 | 2007-04-19 | Honda Motor Co Ltd | Vehicular headlamp structure |
| JP2009104933A (en) * | 2007-10-24 | 2009-05-14 | Stanley Electric Co Ltd | Direct projection type illumination lamp |
| JP2010080306A (en) * | 2008-09-26 | 2010-04-08 | Stanley Electric Co Ltd | Lighting fixture unit for vehicular headlight |
| JP2012142158A (en) * | 2010-12-28 | 2012-07-26 | Stanley Electric Co Ltd | Projector type headlight for motorcycle |
| JP5855258B2 (en) * | 2012-09-07 | 2016-02-09 | 三菱電機株式会社 | Vehicle headlamp device |
| US9689549B2 (en) | 2012-09-07 | 2017-06-27 | Mitsubishi Electric Corporation | Vehicle headlight device |
| JP2016517162A (en) * | 2013-05-08 | 2016-06-09 | チザラ リヒトシステーメ ゲーエムベーハーＺｉｚａｌａ Ｌｉｃｈｔｓｙｓｔｅｍｅ ＧｍｂＨ | Automotive lighting system |
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