JPH08185703A - Headlight device for vehicle - Google Patents
Headlight device for vehicleInfo
- Publication number
- JPH08185703A JPH08185703A JP6328197A JP32819794A JPH08185703A JP H08185703 A JPH08185703 A JP H08185703A JP 6328197 A JP6328197 A JP 6328197A JP 32819794 A JP32819794 A JP 32819794A JP H08185703 A JPH08185703 A JP H08185703A
- Authority
- JP
- Japan
- Prior art keywords
- light
- point
- lens
- lens body
- light distribution
- 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.)
- Pending
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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/27—Thick lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、車両用前照灯装置に
関するもので、例えば単光源の光を複数の光ファイバケ
ーブルに分配してさらに所要の配光として照射する導光
式ヘッドランプにおいて、ホットゾーン配光用の導光路
レンズを遠方照射光が増大するように改良するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headlamp device, for example, in a light guide type headlamp for distributing light of a single light source to a plurality of optical fiber cables and irradiating the light as required light distribution. , A light guide lens for hot zone light distribution is improved so that distant irradiation light is increased.
【０００２】[0002]
【従来の技術】近年、車両用の前照灯として、照度に対
する電力効率の観点から、放電管を光源として利用し、
これに放電管用の制御回路を組み合わせたものが考えら
れてきているが、制御回路が高価につくため、放電管を
集中光源として車両内の一箇所に設け、そこから車両前
部の左右前照灯の位置まで光ケーブルにより光束を案内
し、そこからレンズ体により前方に照射する方式が考え
られている。例えば、本出願人が特許出願した特開平６
−６８７０２号に記載された発明は、その一例である。
図３にそのような従来のものの構造の一例を示すが、
（Ａ）のように光ケーブル１からシェード板２を介して
偏平配光レンズ４およびホットゾーン配光レンズ３へ光
を導き、そこから前方に照射している。偏平配光レンズ
４は、（Ｂ）のように側面を２枚の近接した垂直な平行
面とし前面を円柱面とする円柱凸レンズであり、車両の
前方に水平線Ｈ−Ｈより下に縦方向には狭く横方向に幅
広く広がる偏平配光照明１４を行う。ホットゾーン配光
レンズ３は、（Ｃ）のように円錘体を半裁した形で前面
がほぼ球面（厳密には、いわゆる非球面）の凸レンズで
あり、車両の前方に水平線Ｈ−Ｈの僅か下方に垂直線Ｖ
−Ｖを挟んで集中したホットゾーン配光照明１３を行
う。2. Description of the Related Art Recently, as a vehicle headlamp, a discharge tube is used as a light source from the viewpoint of power efficiency with respect to illuminance.
It has been considered to combine this with a control circuit for the discharge tube, but since the control circuit is expensive, the discharge tube is installed as a centralized light source in one place inside the vehicle, and from there the left and right headlights on the front of the vehicle are used. A method is considered in which a light beam is guided to the position of the lamp by an optical cable, and the lens body irradiates the light beam forward from there. For example, Japanese Unexamined Patent Application Publication No. Hei 6 (1994) filed by the applicant
The invention described in -68702 is an example thereof.
FIG. 3 shows an example of the structure of such a conventional one.
As shown in (A), the light is guided from the optical cable 1 to the flat light distributing lens 4 and the hot zone light distributing lens 3 through the shade plate 2, and the light is irradiated forward from there. The flat light distribution lens 4 is a cylindrical convex lens having two parallel side surfaces in close proximity and a cylindrical surface on the front surface, as shown in (B), and extends vertically below the horizontal line H-H in front of the vehicle. Performs flat light distribution illumination 14 that is narrow and wide in the lateral direction. The hot-zone light distributing lens 3 is a convex lens whose front surface is almost spherical (strictly, so-called aspherical surface) in the shape of a conical body cut in half as shown in (C), and a slight amount of a horizontal line H-H in front of the vehicle. Vertical line V below
The concentrated hot zone light distribution illumination 13 is performed with the -V in between.
【０００３】[0003]
【発明が解決しようとする課題】この場合、ホットゾー
ン配光レンズ３による前方照明において、光は図４に図
解するように進行する。すなわち、Ｐ点からレンズ体に
入射した光は、レンズ内を直進して凸レンズ面７から出
射して遠方Ａを照射する光と、全反射面５（例えば、Ｒ
点）で内部反射した後凸レンズ面７から出射して近傍Ｂ
を照射する光に大別される。このため、上向きに入射し
た光は近傍を照らす光に回ってしまい、下向きに入射し
た光のみが遠方を照らすのに寄与し、遠方照射量が不足
しがちである。したがって、この発明は、全反射して近
傍照射に回る光をなるべく少なくして、より多くの光束
が遠方照射に回るようにすることを目的とする。In this case, in the forward illumination by the hot zone light distribution lens 3, the light travels as illustrated in FIG. That is, the light that has entered the lens body from point P travels straight in the lens, exits from the convex lens surface 7 and illuminates the distance A, and the total reflection surface 5 (for example, R
After being internally reflected at the point), the light is emitted from the convex lens surface 7 and the vicinity B
It is roughly divided into the light that illuminates. For this reason, the light incident upward is turned into the light illuminating the vicinity, and only the light incident downward contributes to illuminate the distant place, and the distant irradiation amount tends to be insufficient. Therefore, it is an object of the present invention to reduce the amount of light that undergoes total reflection and travels to near-field irradiation as much as possible so that more light fluxes can travel to far-field irradiation.
【０００４】[0004]
【課題を解決するための手段】この発明による車両用前
照灯装置は、ホットゾーン配光レンズを、偏平配光レン
ズを収容するための切り欠き部分を除くほぼ残り全体を
占める形状に構成するものである。In the vehicle headlamp device according to the present invention, the hot zone light distribution lens is configured to occupy substantially the entire remaining portion excluding the cutout portion for accommodating the flat light distribution lens. It is a thing.
【０００５】[0005]
【発明の作用】したがって、光ケーブルからの入射光の
内の僅かの部分のみが切り欠きを規定する全反射面で反
射して近傍の照明に回り、大部分は凸レンズ面まで直進
して遠方照明に回る。Therefore, only a small part of the incident light from the optical cable is reflected by the total reflection surface that defines the notch and goes to the nearby illumination, and most of the light goes straight to the convex lens surface and becomes the far illumination. spin.
【０００６】[0006]
【実施例】以下、図面を参照しながら、この発明の車両
用前照灯装置の実施例を説明する。図１は、この発明の
実施例の全体を示す斜視図で、１は光ケーブル、３はこ
の発明が工夫した形状のホットゾーン配光レンズ、７は
その凸レンズ面、４は偏平配光レンズ、８はその円柱凸
レンズ面である。光ケーブル１は、図示しない光源から
延びており、放電灯などの光源から光を案内し、レンズ
３、４の入射面へ導いている。レンズ３、４の材質とし
ては、例えばアクリル樹脂など、その内部で光を導くべ
く空気に対して所定の屈折率を有する透明度の高い透光
性の材料を採用する。なお、図１には車両に設けられる
複数の前照灯のうちのひとつを図示している。また、図
１では図示を明瞭にするため、シェードを省略している
が、従来技術と同様に上方カットラインを規定する形状
のシェードが設けられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle headlight device of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an entire embodiment of the present invention. Reference numeral 1 is an optical cable, 3 is a hot zone light distribution lens having a shape devised by the present invention, 7 is its convex lens surface, 4 is a flat light distribution lens, 8 Is the cylindrical convex lens surface. The optical cable 1 extends from a light source (not shown), guides light from a light source such as a discharge lamp, and guides the light to the incident surfaces of the lenses 3 and 4. As the material of the lenses 3 and 4, for example, an acrylic resin or the like and a highly transparent material having a predetermined refractive index with respect to air in order to guide light therein is adopted. It should be noted that FIG. 1 shows one of a plurality of headlamps provided in the vehicle. Although the shade is omitted in FIG. 1 for the sake of clarity, a shade having a shape that defines the upper cut line is provided as in the prior art.
【０００７】偏平配光レンズ４は、接近した２枚の平行
なほぼ垂直な面を側面とするほぼ扇形の円柱凸レンズ
で、焦点は光ケーブル１からの入射面の近傍にある。両
側面と下側の面は、透明な平面で、内部を進行する光を
全反射させながら伝達する。出射面は、横方向には直線
の母線を有し、上下方向にはほぼ円弧を成す円柱凸レン
ズ面となっているので、このレンズ４から出る光束は、
左右方向に広がり上下方向に収束された偏平な照明領域
を形成する。The flat light distributing lens 4 is a substantially fan-shaped cylindrical convex lens whose side faces are two parallel and nearly vertical faces that are close to each other, and its focal point is near the incident surface from the optical cable 1. Both side surfaces and the lower surface are transparent flat surfaces and transmit the light traveling inside while totally reflecting it. The exit surface is a cylindrical convex lens surface having a straight generatrix in the lateral direction and a substantially arcuate shape in the vertical direction, so that the light flux emitted from this lens 4 is
A flat illumination area that spreads in the left-right direction and converges in the up-down direction is formed.
【０００８】ホットゾーン配光レンズ３は、上記偏平配
光レンズ４を収容するためのＥＦＧＨを底面とする角溝
状の切り欠き部分を除くほぼ残り全体を占める略円錐形
状を成し、出射面がほぼ球面（厳密には、収差補正のた
め僅かに非球面）で、焦点が光ケーブル１からの入射面
の近傍にある凸レンズ体である。なお、この凸レンズ体
としての光軸上に上記底面ＥＦＧＨは広がっている。偏
平配光レンズ４との合わせ面は、それぞれの光束が干渉
しないように全反射面となっている。The hot-zone light distributing lens 3 has a substantially conical shape which occupies substantially the entire remaining portion except for the rectangular groove-shaped notch portion whose bottom is EFGH for accommodating the flat light distributing lens 4. Is a spherical surface (strictly speaking, it is slightly aspherical surface for aberration correction), and its focal point is a convex lens body near the incident surface from the optical cable 1. The bottom surface EFGH extends on the optical axis of the convex lens body. The mating surface with the flat light distributing lens 4 is a total reflection surface so that the respective light beams do not interfere with each other.
【０００９】角溝状の切り欠き部分は、底面ＥＦＧＨ
と、辺ＨＥから上方へ向けて垂直に延びる平面と、辺Ｆ
Ｇから上方へ向けて垂直に延びる平面とで区画規定され
ており、後述する底面での全反射を考慮して切り欠きは
上方に向けて空いている。The square groove-shaped cutout portion has a bottom surface EFGH.
And a plane vertically extending upward from the side HE and a side F
It is defined by a plane that extends vertically upward from G, and the notch is open upward in consideration of total reflection on the bottom surface described later.
【００１０】以上のように、全反射面がＥＦＧＨの部分
と小さいので、例えばＲ点で内部反射して近傍（Ｂ）の
照明に回る光束は少なくなり、その分余計に遠方（Ａ）
の照明に回ることになる。斜め下向きに入射した光は、
従来どおり円錐レンズ体の内部を直進して例えば点Ｋ１
から出射して遠方（Ａ）を照明し、斜め上向きに入射し
た光でも全反射面を外れる光は、やはり円錐レンズ体の
内部を直進して例えば点Ｋ２から出射して同様に遠方
（Ａ）を照明する。As described above, since the total reflection surface is as small as the EFGH portion, for example, the light flux internally reflected at the point R and circulated to the illumination in the vicinity (B) is reduced, and the distance (A) is added to the distance.
Will turn to lighting. The light that enters diagonally downward is
As in the past, go straight inside the conical lens body and, for example, point K1
The light that is emitted from the light source and illuminates the distant area (A), and the light that is incident obliquely upward and that is out of the total reflection surface also travels straight inside the conical lens body and is emitted from, for example, the point K2 and is similarly distant (A). Illuminate.
【００１１】以上説明した図１の構成の前照灯で前方１
０メートルのスクリーンを照明した場合の配光状況を、
４本の等照度線を用いて示すと、図２のようであった。
これを、図３の従来の構造の前照灯による配光状況（図
５に示す）と比較すると、最も明るい２４０ルクス以上
の領域が、従来水平線Ｈ−Ｈより比較的下に離れて存在
していた（図５）のに対して、この発明では水平線Ｈ−
Ｈの近くに存在しており、この分遠方まで照明が届くこ
とになる。In the headlamp having the structure shown in FIG.
The light distribution situation when illuminating a 0-meter screen,
It was as shown in FIG. 2 when shown by using four isolux lines.
Comparing this with the light distribution situation (shown in FIG. 5) by the headlamp having the conventional structure of FIG. 3, the brightest region of 240 lux or more exists relatively below the conventional horizontal line H-H. (FIG. 5), the horizontal line H-
It exists near H, and the illumination reaches this far.
【００１２】なお、上記の実施例では、ホットゾーン配
光レンズ３に設けられる切り欠きは、偏平配光レンズ４
を収容するだけの長方形断面のスリット状であり、両側
の壁は平行であるが、これら両側の壁を逆台形状または
Ｖ字状の断面の両斜面としてもよい。また、ＥＦＧＨの
底面の両側の壁を底面からなめらかに続く断面として上
方へ向けて延ばしてもよい。In the above embodiment, the notch provided in the hot zone light distribution lens 3 is a flat light distribution lens 4
Is a slit shape having a rectangular cross section for accommodating only, and the walls on both sides are parallel, but the walls on both sides may be inverted trapezoidal or V-shaped both slopes. Further, the walls on both sides of the bottom surface of the EFGH may extend upward as a cross section smoothly continuing from the bottom surface.
【００１３】[0013]
【発明の効果】以上説明したように、この発明によれ
ば、全反射により近傍の照明に回る光が少なくなった分
だけ、遠方の照明に回るので、視認性のよい前照灯を提
供することができる。As described above, according to the present invention, a headlight with good visibility is provided because the amount of light that is emitted to a nearby illumination is reduced due to total reflection, and the illumination is provided to a distant illumination. be able to.
【図１】 この発明による車両用前照灯装置の実施例の
斜視図である。FIG. 1 is a perspective view of an embodiment of a vehicle headlight device according to the present invention.
【図２】 この発明の車両用照明装置による照度分布を
示す配光図である。FIG. 2 is a light distribution diagram showing an illuminance distribution by the vehicle lighting device of the present invention.
【図３】 従来の車両用照明装置の例を示す斜視図であ
る。FIG. 3 is a perspective view showing an example of a conventional vehicle lighting device.
【図４】 従来の車両用照明装置におけるホットゾーン
配光レンズによる照明光の進路の例を示す斜視図であ
る。FIG. 4 is a perspective view showing an example of a path of illumination light by a hot zone light distribution lens in a conventional vehicle lighting device.
【図５】 従来の車両用照明装置による照度分布を示す
配光図である。FIG. 5 is a light distribution diagram showing an illuminance distribution by a conventional vehicle lighting device.
１…光ケーブル、２…シェード、３…ホットゾーン配光
レンズ、４…偏平配光レンズ、５…全反射面、６…全反
射面、１３…ホットゾーン配光照明、１４…偏平配光照
明DESCRIPTION OF SYMBOLS 1 ... Optical cable, 2 ... Shade, 3 ... Hot zone light distribution lens, 4 ... Flat light distribution lens, 5 ... Total reflection surface, 6 ... Total reflection surface, 13 ... Hot zone light distribution illumination, 14 ... Flat light distribution illumination
Claims (3)
に照射する車両用前照灯装置であって、 該レンズ体の構造を、互いに接近した実質的に垂直な平
面を有し、その出射面が垂直方向には入射端近傍を焦点
とするほぼ円弧であり水平方向にはほぼ直線であるほぼ
円柱面を呈する第一のレンズ体と、入射端から出射面へ
向かって広がった形で、その入射端近傍を焦点とするほ
ぼ球面の出射面を有し、前記第一のレンズ体を収容する
ための切り欠きを有し、前記切り欠きを除くほぼ残り全
体を占める第二のレンズ体とを備えることを特徴とする
車両用前照灯装置。1. A vehicle headlight device for irradiating light from a light source lamp forward through a lens body, wherein the structure of the lens body has substantially vertical planes close to each other, A first lens body whose emission surface is a substantially circular arc having a focal point near the entrance end in the vertical direction and a substantially straight line in the horizontal direction, and a shape extending from the entrance end to the exit surface A second lens having a substantially spherical exit surface whose focal point is in the vicinity of the incident end thereof, having a notch for accommodating the first lens body, and occupying substantially the entire remaining portion excluding the notch. A vehicle headlight device, comprising: a body.
が、前記第二のレンズ体の光軸にほぼ平行で前記光軸の
両側にほぼ垂直に立つ２枚の平面と、ほぼ前記光軸を通
り前記２枚の平面に直角に交わる平面で定義される底面
とを有する角溝状であることを特徴とする請求項１に記
載の車両用前照灯装置。2. The shape of the cutout of the second lens body is substantially parallel to the optical axis of the second lens body and two planes that stand substantially vertically on both sides of the optical axis, and substantially the optical plane. The vehicle headlight device according to claim 1, wherein the vehicle headlight device has a bottom surface defined by a plane that passes through an axis and intersects the two planes at a right angle.
前記光軸の上方に向けて空いていることを特徴とする請
求項２に記載の車両用前照灯装置。3. The vehicle headlight device according to claim 2, wherein the notch of the second lens body has a groove-shaped notch toward the upper side of the optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6328197A JPH08185703A (en) | 1994-12-28 | 1994-12-28 | Headlight device for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6328197A JPH08185703A (en) | 1994-12-28 | 1994-12-28 | Headlight device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08185703A true JPH08185703A (en) | 1996-07-16 |
Family
ID=18207542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6328197A Pending JPH08185703A (en) | 1994-12-28 | 1994-12-28 | Headlight device for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08185703A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011243373A (en) * | 2010-05-17 | 2011-12-01 | Sharp Corp | Light-emitting device, illuminating device, and vehicle headlight |
| US8833991B2 (en) | 2010-02-10 | 2014-09-16 | Sharp Kabushiki Kaisha | Light emitting device, with light guide member having smaller exit section, and illuminating device, and vehicle headlight including the same |
| US8876344B2 (en) | 2009-12-17 | 2014-11-04 | Sharp Kabushiki Kaisha | Vehicle headlamp with excitation light source, light emitting part and light projection section |
| JP2015099689A (en) * | 2013-11-19 | 2015-05-28 | スタンレー電気株式会社 | Head light for vehicle, and lens body |
| US9816677B2 (en) | 2010-10-29 | 2017-11-14 | Sharp Kabushiki Kaisha | Light emitting device, vehicle headlamp, illumination device, and laser element |
-
1994
- 1994-12-28 JP JP6328197A patent/JPH08185703A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8876344B2 (en) | 2009-12-17 | 2014-11-04 | Sharp Kabushiki Kaisha | Vehicle headlamp with excitation light source, light emitting part and light projection section |
| US8833991B2 (en) | 2010-02-10 | 2014-09-16 | Sharp Kabushiki Kaisha | Light emitting device, with light guide member having smaller exit section, and illuminating device, and vehicle headlight including the same |
| JP2011243373A (en) * | 2010-05-17 | 2011-12-01 | Sharp Corp | Light-emitting device, illuminating device, and vehicle headlight |
| US9816677B2 (en) | 2010-10-29 | 2017-11-14 | Sharp Kabushiki Kaisha | Light emitting device, vehicle headlamp, illumination device, and laser element |
| US10281102B2 (en) | 2010-10-29 | 2019-05-07 | Sharp Kabushiki Kaisha | Light emitting device, vehicle headlamp, illumination device, and laser element |
| US10465873B2 (en) | 2010-10-29 | 2019-11-05 | Sharp Kabushiki Kaisha | Light emitting device, vehicle headlamp, illumination device, and laser element |
| JP2015099689A (en) * | 2013-11-19 | 2015-05-28 | スタンレー電気株式会社 | Head light for vehicle, and lens body |
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