JP2541869B2 - Automotive headlights - Google Patents
Automotive headlightsInfo
- Publication number
- JP2541869B2 JP2541869B2 JP2263460A JP26346090A JP2541869B2 JP 2541869 B2 JP2541869 B2 JP 2541869B2 JP 2263460 A JP2263460 A JP 2263460A JP 26346090 A JP26346090 A JP 26346090A JP 2541869 B2 JP2541869 B2 JP 2541869B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lenses
- optical axis
- zone
- cylindrical
- 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.)
- Expired - Fee Related
Links
Landscapes
- Mechanical Light Control Or Optical Switches (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、バルブの光軸上に２枚のレンズを配置し、
該両レンズの相対距離を可変して照射光束を拡散又は収
束させる機能を備えた自動車用前照灯に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has two lenses arranged on the optical axis of a bulb,
The present invention relates to a vehicle headlamp having a function of varying a relative distance between the two lenses and diffusing or converging an irradiation light beam.
従来より自動車の前照灯において、第６図（ａ）及び
（ｂ）に示すように、放物反射鏡面の前方又はプロジェ
クタランプの前方光軸上に、同一ピッチのシリンドカル
ステップ62,63を多数設けた２枚のレンズ60,61を正対さ
せ、それらの間隔を調整することにより左右方向の照射
範囲を段階的或は車速等に連動して可変とする照明装置
が使用されている。Conventionally, in a headlight of an automobile, as shown in FIGS. 6 (a) and 6 (b), a cylindrical step 62, 63 having the same pitch is provided in front of the parabolic reflector surface or on the front optical axis of the projector lamp. A lighting device is used in which two lenses 60 and 61 provided with a large number of lenses are directly opposed to each other, and the distance between them is adjusted to make the irradiation range in the left-right direction variable stepwise or in conjunction with vehicle speed or the like. .
しかし、この種の上記構成の照明装置は、 （ａ） ２枚のレンズ60,61で光束の向きを制御するた
め、その色収差は１枚のレンズのときに比べて大きくな
る。However, in this type of illumination device having the above configuration, (a) the chromatic aberration is larger than that of a single lens, because the direction of the light flux is controlled by the two lenses 60 and 61.
（ｂ） レンズの周辺に入射する光束は、２枚のレンズ
60,61により光束の向きを大きく変向されるため、特に
色収差が大きく成ることから、第６図に示すように、全
体の光束のうち、特に側方周辺部（矢印A,B）に向かう
光束にレンズの色収差による色ムラが発生し、 （１） 狭拡散時（矢印Ａ）には周辺部はやや赤みがか
った照射光色に成る。(B) The light flux incident on the periphery of the lens is composed of two lenses.
Since the direction of the luminous flux is largely changed by 60 and 61, the chromatic aberration becomes particularly large, and therefore, as shown in FIG. 6, particularly toward the side peripheral portions (arrows A and B) of the entire luminous flux. Color unevenness occurs in the light flux due to chromatic aberration of the lens. (1) When the light is narrowly diffused (arrow A), the peripheral portion has a slightly reddish irradiation light color.
（２） 広拡散時（矢印Ｂ）には周辺部はやや青みがか
った照射光色に成るため、上記周辺の光束が路面或はガ
ードレールに照射された場合、生理的に不快感を覚える
という問題を有していた。(2) At the time of wide diffusion (arrow B), the peripheral part has a slightly bluish irradiation color, and therefore, when the peripheral luminous flux is irradiated on the road surface or the guardrail, physiologically uncomfortable feeling occurs. Had.
また、２枚のレンズ60,61のシリンドリカルレンズス
テップの形状を各レンズ内で焦点距離と共に同一に構成
した場合、平坦な配光が形成されるため、側方に向かう
照度も高く、特に広拡散にした場合に路肩やガードレー
ル等が明るく輝きすぎて前方の視認性が損なわれるとい
う問題があった。Also, if the shape of the cylindrical lens step of the two lenses 60 and 61 is made the same in each lens along with the focal length, a flat light distribution is formed, so the illuminance toward the side is also high, and particularly wide diffusion. However, there is a problem in that the road shoulders, guardrails, etc. are too bright and the visibility in front is impaired.
更に、両レンズ60,61の間隔に関係なく照射パターン
の左右方向の照明範囲が明確に区画され、この照明範囲
を越えると急激に暗く成るため自動車の運転に不安を覚
えることがある等の問題もあった。Furthermore, the left and right illumination range of the irradiation pattern is clearly defined regardless of the distance between the two lenses 60 and 61, and if it exceeds this illumination range, it will be abruptly dark, which may cause anxiety in driving a car. There was also.
本発明は、上記問題に鑑みて創案されたものであり、
レンズの色収差による照射光束の色ムラを解消し、且つ
光照射域と非照射域の境界のコントラストを小さくした
自動車用前照灯を提供することを目的とするものであ
る。The present invention was created in view of the above problems,
It is an object of the present invention to provide a vehicle headlamp that eliminates color unevenness of an irradiation light beam due to chromatic aberration of a lens and reduces the contrast of a boundary between a light irradiation area and a non-irradiation area.
上記目的を達成するために、本発明に係る自動車前照
灯は、光軸と略平行な光束を照射する平行光束照射手段
の前方光軸上にシリンドリカルレンズステップを同一ピ
ッチで構成した２枚のレンズを各ピッチが相対する位置
に配置し、該両レンズの間隔を調整することにより、左
右方向へのビーム拡散範囲を制御できるようにした自動
車用前照灯において、前記レンズの一方或は両方のレン
ズについて、該各シリンダカルレンズステップの焦点距
離を光軸から周辺に向かうに従い長くなるように徐変或
は段階的に変更したことを要旨とするものである。In order to achieve the above-mentioned object, an automobile headlamp according to the present invention comprises two cylindrical lens steps arranged at the same pitch on the front optical axis of a parallel luminous flux irradiating means for radiating a luminous flux substantially parallel to the optical axis. In an automobile headlight in which lenses are arranged at positions where pitches are opposed to each other and a beam divergence range in the left-right direction can be controlled by adjusting a distance between the lenses, one or both of the lenses are provided. The gist of the lens is that the focal length of each of the cylindrical lens steps is gradually or gradually changed so as to become longer from the optical axis toward the periphery.
上記構成によれば、光軸上に設けた外側レンズと内側
レンズに構成してなる隣設したシリンドリカルレンズス
テップの焦点距離が変えてあるため、レンズの透過光束
が互いに重なり合い、レンズの色収差による色ムラが目
立たなくなって、視認制御を改善することができる。According to the above configuration, since the focal lengths of the adjacent cylindrical lens steps formed by the outer lens and the inner lens provided on the optical axis are changed, the transmitted light beams of the lenses overlap each other, and the color due to the chromatic aberration of the lens is caused. The unevenness is less noticeable, and the visual recognition control can be improved.
また、本発明によれば、照射光束のパターンのうち光
軸近傍部が常時最大照度となるため、遠方視認性が優
れ、また側方に至るに従い光束の照度を適正に設計制御
することができるため、眩光を抑制して良好な視認性を
得ることができる。Further, according to the present invention, since the illuminance near the optical axis of the pattern of the irradiation light flux is always the maximum illuminance, the distant visibility is excellent, and the illuminance of the light flux can be appropriately designed and controlled toward the side. Therefore, glare can be suppressed and good visibility can be obtained.
以下、本発明に係る自動車用前照灯の実施例を図面に
従って説明する。An embodiment of a vehicle headlamp according to the present invention will be described below with reference to the drawings.
第１図及び第２図は、第一の実施例を示すものであ
り、光軸Ｌ上に配置した外側レンズ１の各シリンドリカ
ル凸レンズステップ11a,11b…は、それぞれ同一焦点距
離を有し同一断面形状となるように構成すると共に、内
側レンズ２の各シリンドリカル凸レンズステップ21a,21
b…は、光軸から周辺に向かうに従い、その焦点距離f1,
f2,f3を長くなるように徐変（f1＜f2＜f3）した構造に
成る。1 and 2 show the first embodiment, in which each of the cylindrical convex lens steps 11a, 11b ... Of the outer lens 1 arranged on the optical axis L has the same focal length and the same cross section. Each of the cylindrical convex lens steps 21a, 21 of the inner lens 2 is configured to have a shape.
b ... is its focal length f1, as it goes from the optical axis to the periphery.
It has a structure in which f2 and f3 are gradually changed (f1 <f2 <f3) so that they become longer.
第２図に示すように上記両レンズ1,2の構成の場合の
スクリーン上の配光は、各レンズステップを透過した光
束により中心側から、21aと11aによる配光部P1、21bと1
1bによる配光部P2、及び21cと11cによる配光部P3とから
成る全体の配光が形成される。従って、照射光束の各部
の配光P1,P2,P3が他の配光と重ね合わされるため、該各
配光P1,P2,P3の色ムラの量が少なくなると共に、２枚の
同一形状のレンズステップの場合と比較して色ムラが大
幅に低減される。As shown in FIG. 2, the light distribution on the screen in the case of the above-mentioned configuration of both lenses 1 and 2 is the light distribution part P1, 21b and 1 by 21a and 11a from the center side by the light flux transmitted through each lens step.
A light distribution part P2 by 1b and a light distribution part P3 by 21c and 11c is formed. Therefore, since the light distributions P1, P2, P3 of the respective portions of the irradiation light flux are superimposed on the other light distributions, the amount of color unevenness of the respective light distributions P1, P2, P3 is reduced and the two light distributions of the same shape are formed. Color unevenness is significantly reduced compared to the case of the lens step.
第３図及び第４図は、本発明の第二の実施例を示すも
のであり、外側レンズ１のシリンドリカルレンズステッ
プは凹レンズステップによって構成してある。FIGS. 3 and 4 show a second embodiment of the present invention, in which the cylindrical lens step of the outer lens 1 is constituted by a concave lens step.
光軸Ｌ上に配置した外側レンズ１の各シリンドリカル
凹レンズステップは、光軸Ｌに近い中央部のＡゾーンの
ステップ12a,12a…と、光軸Ｌと離れたＡゾーンの両外
側に位置するＢゾーンのステップ12b,12b…の２種類か
ら成り、両ゾーンのシリンドリカル凹レンズステップ12
a,12bの焦点距離fa,fbは、ＡゾーンのものがＢゾーンの
ものより短く（fa＜fb）なるように構成してある。ま
た、内側レンズ２のレンズステップは凸レンズステップ
によって構成してあり、上記外側レンズ１の各レンズス
テップと対応するように、ＡゾーンとＢゾーンに区画さ
れている。そしてＡゾーンのステップ22a,22a…と、光
軸Ｌと離れたＡゾーンの両外側に位置するＢゾーンのス
テップ22b,22b…は、その焦点距離が、Ａゾーンのもの
がＢゾーンのものより短い（fa＜fb）構造に成ってい
る。Each of the cylindrical concave lens steps of the outer lens 1 arranged on the optical axis L is located on both outer sides of the steps 12a, 12a in the central A zone near the optical axis L and the A zone distant from the optical axis L. It consists of two types of zone steps 12b, 12b ... Cylindrical concave lens step 12 of both zones
The focal lengths fa and fb of a and 12b are configured so that those in the A zone are shorter than those in the B zone (fa <fb). The lens step of the inner lens 2 is formed by a convex lens step, and is divided into an A zone and a B zone so as to correspond to each lens step of the outer lens 1. Then, the steps 22a, 22a of the A zone and the steps 22b, 22b of the B zone located on both outsides of the A zone away from the optical axis L have focal lengths of the A zone more than those of the B zone. It has a short (fa <fb) structure.
上記両レンズ1,2の構成の場合、第４図に示すように
スクリーン上の配光は、各レンズステップを透過した光
束の拡散角度がＡゾーンのものとＢゾーンのものとで異
なるため、２つのゾーンPa,Pbの配光が重ね合わされる
ように成り、該配光の色ムラの量が少なく成ると共に、
２枚の同一形状のレンズステップの場合と比較して前記
第一の実施例と同様に色ムラが大幅に低減される。In the case of the above-mentioned configuration of both lenses 1 and 2, as shown in FIG. 4, the light distribution on the screen is different in the diffusion angle of the light flux transmitted through each lens step between the A zone and the B zone. The light distributions of the two zones Pa and Pb are overlapped, and the amount of color unevenness of the light distribution is reduced,
Color unevenness is greatly reduced as in the first embodiment, as compared with the case of two lens steps having the same shape.
尚、前記第一及び第二の実施例を示す第１図と第３図
は狭拡散のレンズ位置を示しており、広拡散を得るため
には、第一の実施例では両レンズ1,2の間隔を狭小し、
また第二の実施例の場合は両レンズ1,2の間隔を拡張す
る。但し、第二の実施例の場合は、焦点距離のとりかた
及び各ゾーンの分割の状態によって、両レンズ1,2間隔
の相対変位なので、その途中で最大照度が得られる（照
射光束が収束する）場合がある。また、一般的には第二
の実施例においても外側レンズ１のシリンドカルレンズ
ステップを凸のシリンドリカルレンズによって構成し、
両レンズ1,2を離間させた状態で狭拡散、両レンズ1,2を
近接させた状態で広拡散の照射光束を得るように構成す
ることが好ましい。Incidentally, FIGS. 1 and 3 showing the first and second embodiments show the lens positions of narrow diffusion, and in order to obtain wide diffusion, both lenses 1, 2 are used in the first embodiment. Narrow the space between
In the case of the second embodiment, the distance between both lenses 1 and 2 is expanded. However, in the case of the second embodiment, the maximum illuminance is obtained in the middle because the relative displacement between the two lenses is 1 and 2 depending on how the focal length is taken and how each zone is divided. There is a case. In general, also in the second embodiment, the cylindrical lens step of the outer lens 1 is composed of a convex cylindrical lens,
It is preferable that the irradiation light flux is narrowly diffused when the lenses 1 and 2 are separated from each other, and is wide diffused when the lenses 1 and 2 are close to each other.
次に、第５図は、前記実施例の外側レンズ１に対して
内側レンズ２を光軸Ｌ方向に相対移動するためのレンズ
駆動装置の一実施例を示すものである。Next, FIG. 5 shows an embodiment of a lens driving device for relatively moving the inner lens 2 in the optical axis L direction with respect to the outer lens 1 of the above embodiment.
ケーシング31の前面に形成した矩形開口部に外側レン
ズ１を構成した前面レンズ33の脚部を嵌着締結すると共
に、該ケーシング31の開口部内面を上記外側レンズ１の
脚部形状と略同一の矩形を為す筒状体から成る第二フレ
ーム34を固設してなる。また、該第二フレーム34には光
軸Ｌ方向摺動自在に筒状の第一フレーム35を内挿すると
共に、該第一フレーム35に内側レンズ２を固設してあ
る。上記内側レンズ２と外側レンズ１にはそれぞれ前記
第一又は第二の実施例で説明したように、シリンドリカ
ルな凸又は凹レンズステップ11,21を等ピッチで横列に
並列してなる。37は、内側レンズ２の光軸上後方に形成
したリフレクタであり、該リフレクタ37の放物反射鏡面
38の焦点に点灯用のバルブ39のフィラメントが位置する
ように、ケーシング31の後端にはバルブソケット40が固
設してある。また41は、前記第一フレーム35の後端に光
軸Ｌと平行に突設したレンズ駆動パイプであり、該レン
ズ駆動パイプ41の端部に固設したナット42に対してケー
シング31に回動自在に軸設した螺子軸43を螺合すると共
に、該螺子軸43に軸着したウォームピニオン44と回動伝
達減速機構のウォーム45を噛合し、更に該フォーム45に
軸着した平ギヤ46を制御モータ47の駆動軸に軸着したピ
ニオンギヤ48と噛合した構造に成っている。また、49は
入力軸50に軸着した平ギヤ51を前記ウォーム45に軸着し
たピニオンギヤ52と噛合して鏡転移角を検出するポテン
ショメータである。The leg portion of the front lens 33 forming the outer lens 1 is fitted and fastened to the rectangular opening formed on the front surface of the casing 31, and the inner surface of the opening portion of the casing 31 has substantially the same shape as the leg portion of the outer lens 1. A second frame 34 made of a rectangular tubular body is fixed. Further, a cylindrical first frame 35 is slidably inserted in the second frame 34 in the optical axis L direction, and the inner lens 2 is fixedly mounted on the first frame 35. As described in the first or second embodiment, each of the inner lens 2 and the outer lens 1 has cylindrical convex or concave lens steps 11 and 21 arranged in parallel in a row at equal pitches. Reference numeral 37 is a reflector formed on the optical axis rear side of the inner lens 2, and is a parabolic reflecting mirror surface of the reflector 37.
A valve socket 40 is fixed to the rear end of the casing 31 so that the filament of the bulb 39 for lighting is located at the focal point of 38. Reference numeral 41 denotes a lens drive pipe projecting from the rear end of the first frame 35 in parallel with the optical axis L. The lens drive pipe 41 rotates on the casing 31 with respect to a nut 42 fixedly provided at the end of the lens drive pipe 41. While screwing a freely screwed screw shaft 43, a worm pinion 44 axially attached to the screw shaft 43 is meshed with a worm 45 of a rotation transmission reduction mechanism, and a spur gear 46 axially attached to the form 45 is further engaged. The pinion gear 48 is attached to the drive shaft of the control motor 47 and meshes with the pinion gear 48. Reference numeral 49 is a potentiometer for detecting a mirror transition angle by meshing a spur gear 51 axially attached to the input shaft 50 with a pinion gear 52 axially attached to the worm 45.
上記制御モータ47を正転又は逆転駆動すると、回動伝
達減速機構を介して螺子軸43を所定の速度で回動し、該
螺子軸43と螺合しているナット42との螺合作用によって
レンズ駆動パイプ41を矢印Ｘ方向に変位する。この変位
による第一フレーム35は、第二フレーム34の内面を光軸
Ｌ方向に滑動し、内側レンズ２は外側レンズ１に対して
シリンドリカルレンズステップ11,21相互のピッチ方向
の相対位置を変えることなく正確に変位し、両レンズ1,
2間の相対距離を変更することができる。そして、この
相対距離はポテンショメータ49により検出され、上記両
レンズ2,6の相対距離とポテンショメータ49の関係を予
め設定することにより、該ポテンショメータ17からの位
置信号をもって制御モータ47を中央制御回路（図示せ
ず）によって制御駆動することができ、照射光束の拡散
幅を切り替えることができる。When the control motor 47 is driven in the normal rotation or the reverse rotation, the screw shaft 43 is rotated at a predetermined speed via the rotation transmission reduction mechanism, and by the screwing action of the nut 42 screwed with the screw shaft 43. The lens drive pipe 41 is displaced in the arrow X direction. Due to this displacement, the first frame 35 slides on the inner surface of the second frame 34 in the optical axis L direction, and the inner lens 2 changes the relative position in the pitch direction between the cylindrical lens steps 11 and 21 with respect to the outer lens 1. Accurate displacement without both lenses 1,
You can change the relative distance between the two. Then, this relative distance is detected by the potentiometer 49, by presetting the relationship between the relative distance between the two lenses 2 and 6 and the potentiometer 49, the central control circuit for the control motor 47 with the position signal from the potentiometer 17 (Fig. It can be controlled and driven by (not shown), and the diffusion width of the irradiation light beam can be switched.
本発明に係る自動車用前照灯は、以上のように構成し
たから、光軸上に設けた外側レンズと内側レンズに構成
して成る隣接したシリンドカルレンズステップの焦点距
離を変えることにより、レンズの透過光束が互いに重な
り合うように成るため、レンズの色収差による色ムラが
目立たなく成る。Since the vehicle headlamp according to the present invention is configured as described above, by changing the focal lengths of the adjacent cylindrical lens steps formed by the outer lens and the inner lens provided on the optical axis, Since the transmitted light fluxes of the lenses overlap each other, the color unevenness due to the chromatic aberration of the lenses becomes inconspicuous.
また、本発明によれば、照射光束のパターンのうち光
軸近傍部が常時最大照度となるため、遠方視認性が優
れ、また側方に至るに従い光束の照度を適正に設計制御
することができるため、ガードレール及び路肩が必要以
上の輝光することがなく、眩光を抑制して良好な視認性
を得ることができる等の特徴を有するものであり、本発
明実施による効果は極めて大きい。Further, according to the present invention, since the illuminance near the optical axis of the pattern of the irradiation light flux is always the maximum illuminance, the distant visibility is excellent, and the illuminance of the light flux can be appropriately designed and controlled toward the side. Therefore, the guard rail and the road shoulder do not shine more than necessary, and the characteristic is that glare can be suppressed and good visibility can be obtained, and the effect of the present invention is extremely large.
第１図は本発明に係る自動車用前照灯の第一の実施例を
示すレンズ系の説明図、 第２図は同レンズ系による照射パターンの説明図、 第３図は本発明の第二の実施例を示すレンズ系の説明
図、 第４図は同レンズ系による照射パターンの説明図、 第５図は本発明に係る自動車用前照灯のレンズ系の駆動
機構の一実施例を示すものであり、 （ａ）は一部切欠した側断面図、 （ｂ）は同平断面図、 （ｃ）は背面図、 第６図は従来のレンズ系を示すものであり、 （ａ）は狭拡散時の説明図、 （ｂ）は広拡散時の説明図、 第７図は同レンズ系による照射パターンを示す説明図で
ある。 １……外側レンズ、２……内側レンズ 11,11a,11b……シリンドリカル凸レンズステップ 21,21a,21b……シリンドリカル凸レンズステップ 34……第二フレーム、35……第一フレーム 37……リフレクタ、38……放物反射鏡面 39……点灯バルブ、41……レンズ駆動パイプ 42……ナット、43……螺子軸 44……ウォームピニオン 45……ウォーム、47……制御モータ 49……ポテンショメータFIG. 1 is an explanatory view of a lens system showing a first embodiment of a vehicle headlamp according to the present invention, FIG. 2 is an explanatory view of an irradiation pattern by the lens system, and FIG. 3 is a second view of the present invention. 4 is an explanatory view of a lens system showing an embodiment of the present invention, FIG. 4 is an explanatory view of an irradiation pattern by the same lens system, and FIG. 5 shows an embodiment of a drive system of a lens system of a vehicle headlamp according to the present invention. (A) is a partially cutaway side sectional view, (b) is the same plane sectional view, (c) is a rear view, FIG. 6 shows a conventional lens system, and (a) is Explanatory drawing at the time of narrow diffusion, (b) is explanatory drawing at the time of wide diffusion, FIG. 7 is explanatory drawing which shows the irradiation pattern by the same lens system. 1 …… Outer lens, 2 …… Inner lens 11,11a, 11b …… Cylindrical convex lens step 21,21a, 21b …… Cylindrical convex lens step 34 …… Second frame, 35 …… First frame 37 …… Reflector, 38 …… Parabolic reflector surface 39 …… Lighting valve, 41 …… Lens drive pipe 42 …… Nut, 43 …… Screw shaft 44 …… Worm pinion 45 …… Worm, 47 …… Control motor 49 …… Potentiometer
Claims (1)
射手段の前方光軸上にシリンドリカルレンズステップを
同一ピッチで構成した２枚のレンズを各ピッチが相対す
る位置に配置し、該両レンズの間隔を調整することによ
り、左右方向へのビーム拡散範囲を制御できるようにし
た自動車用前照灯において、 前記レンズの一方或は両方のレンズについて、該各シリ
ンドリカルレンズステップの焦点距離を光軸から周辺に
向かうに従い長くなるように徐変或は段階的に変更した
ことを特徴とする自動車用前照灯。1. Two lenses having cylindrical lens steps arranged at the same pitch on the front optical axis of a parallel light beam irradiating means for irradiating a light beam substantially parallel to the optical axis are arranged at positions where the respective pitches are opposed to each other. In a vehicle headlamp capable of controlling the beam divergence range in the left-right direction by adjusting the distance between both lenses, the focal length of each of the cylindrical lens steps is adjusted for one or both of the lenses. A vehicle headlight characterized by gradually changing or gradually changing so that it becomes longer from the optical axis toward the periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263460A JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263460A JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04141901A JPH04141901A (en) | 1992-05-15 |
| JP2541869B2 true JP2541869B2 (en) | 1996-10-09 |
Family
ID=17389818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2263460A Expired - Fee Related JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541869B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190009524A (en) * | 2017-07-19 | 2019-01-29 | 에스엘 주식회사 | Lamp for vehicle |
| KR20190081309A (en) * | 2017-12-29 | 2019-07-09 | 에스엘 주식회사 | Lamp for vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4489678B2 (en) * | 2005-09-30 | 2010-06-23 | 富士通株式会社 | Wavelength selective optical switch and optical device with spectroscopic function |
| JP7187988B2 (en) * | 2018-10-31 | 2022-12-13 | 市光工業株式会社 | vehicle lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638321Y2 (en) * | 1988-11-16 | 1994-10-05 | 株式会社小糸製作所 | Variable range lighting device |
-
1990
- 1990-10-01 JP JP2263460A patent/JP2541869B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190009524A (en) * | 2017-07-19 | 2019-01-29 | 에스엘 주식회사 | Lamp for vehicle |
| KR20190081309A (en) * | 2017-12-29 | 2019-07-09 | 에스엘 주식회사 | Lamp for vehicle |
| KR102463273B1 (en) * | 2017-12-29 | 2022-11-04 | 에스엘 주식회사 | Lamp for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04141901A (en) | 1992-05-15 |
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| LAPS | Cancellation because of no payment of annual fees |