JP6727718B2 - Vehicle headlights - Google Patents

Vehicle headlights Download PDF

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JP6727718B2
JP6727718B2 JP2016146712A JP2016146712A JP6727718B2 JP 6727718 B2 JP6727718 B2 JP 6727718B2 JP 2016146712 A JP2016146712 A JP 2016146712A JP 2016146712 A JP2016146712 A JP 2016146712A JP 6727718 B2 JP6727718 B2 JP 6727718B2
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vehicle
light
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segment
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賢 徳永
賢 徳永
研介 大島
研介 大島
健作 岡村
健作 岡村
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Daihatsu Motor Co Ltd
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Description

本発明は、車両に装備される走行用前照灯に関する。 The present invention relates to a traveling headlight mounted on a vehicle.

近時、夜間に車両の前方にある交通上の障害物を適切に確認でき、かつ照射光線が対向車や先行車の交通を妨げないような、配光可変型前照灯システムが開発されている。配光可変型前照灯システムは、車載のカメラで撮影した画像を解析して対向車や先行車を検出し、当該対向車または先行車の存在する領域以外の領域に向けて照明光を正射する状態を維持しながら、当該対向車または先行車の存在する領域に限って照明光を照射しないようにするものである。配光可変型前照灯システムにより、対向車または先行車の搭乗者を眩惑させずに走行用前照灯(ハイビーム)を使用して安全に夜間走行を行うことができる。 Recently, a variable light distribution type headlight system has been developed that can appropriately check traffic obstacles in front of the vehicle at night and does not block the traffic of oncoming vehicles or preceding vehicles by the irradiation light. There is. The variable light distribution headlamp system analyzes an image captured by a vehicle-mounted camera to detect an oncoming vehicle or a preceding vehicle, and directs the illumination light toward an area other than the area where the oncoming vehicle or the preceding vehicle exists. The illumination light is limited to the area in which the oncoming vehicle or the preceding vehicle exists while maintaining the shining state. With the variable light distribution type headlight system, it is possible to safely drive at night by using the headlight for traveling (high beam) without dazzling passengers of an oncoming vehicle or a preceding vehicle.

前照灯の配光パターンを変化させるための具体的な仕組みとしては、光源から放たれる光を反射させるリフレクタをアクチュエータにより駆動して光軸の向きを変位させる態様のもの(例えば、下記特許文献1を参照)や、多数の独立した光源の点灯/消灯を頻繁に切り換えることで照明光の照射範囲を細かく制御する態様のもの(例えば、下記非特許文献1を参照)が知られている。 As a specific mechanism for changing the light distribution pattern of the headlight, a structure in which a reflector that reflects light emitted from a light source is driven by an actuator to displace the direction of the optical axis (for example, the following patents: (See Reference 1) and a mode in which the irradiation range of illumination light is finely controlled by frequently switching on/off of a large number of independent light sources (for example, see Non-Patent Document 1 below). ..

前者の態様のものは、リフレクタを可動に支持しこれを適正な姿勢に操作するための機構を作り込み、かつ長期間の使用に耐え得る耐久性を確保することが要求される。後者の態様のものは、多数個の光源を設置しかつそれらを制御するスイッチング回路を実装する必要がある。従って、何れも高コストとなるきらいがある。 In the former aspect, it is required that a mechanism for movably supporting the reflector and operating the reflector in an appropriate posture be built in and that the durability be durable for long-term use. The latter embodiment requires the installation of multiple light sources and the implementation of switching circuits to control them. Therefore, both of them tend to be expensive.

特開2016−120871号公報JP, 2016-120871, A

“Audi(登録商標)マトリックスLEDヘッドライト”、[online]、アウディ アクチェンゲゼルシャフト、[平成28年7月5日検索]、インターネット<URL:http://www.audi.co.jp/jp/brand/ja/vorsprung_durch_technik/content/2013/10/audi-a8-in-a-new-radiant-light.html>"Audi (registered trademark) Matrix LED headlight", [online], Audi Akchen Gesellshaft, [July 5, 2016 search], Internet <URL: http://www.audi.co.jp/jp/ brand/ja/vorsprung_durch_technik/content/2013/10/audi-a8-in-a-new-radiant-light.html>

本発明は、多数個の光源を必要とせず、対向車が存在していても自車線を適切に照明でき、また先行車が存在していても一定距離までは前方を照明できるような走行用前照灯を実現することを所期の目的とする。 INDUSTRIAL APPLICABILITY The present invention does not require a large number of light sources and can appropriately illuminate the own lane even when there is an oncoming vehicle, and can also illuminate the front side up to a certain distance even when a preceding vehicle exists. The intended purpose is to realize a headlight.

本発明では、車両における対向車線側の部位に設置する複数の光源セグメントのうち、自車線または自車線よりも反対向車線側を指向して光を照射する光源セグメントの数を、対向車線側を指向して光を照射する光源セグメントの数よりも多くした車両の走行用前照灯を構成した。 In the present invention, among a plurality of light source segments installed in a region on the opposite lane side of a vehicle, the number of light source segments that direct light toward the own lane or the opposite lane side from the own lane is set to the opposite lane side. A vehicle headlamp is constructed in which the number of light source segments that irradiate light is increased.

本発明では、車両に設置する複数の光源セグメントとして、路面と平行な方向を指向して光を照射する光源セグメントに加え、車両における反対向車線側に設置され路面と交差する斜め下方を指向して光を照射しすれ違い用照明灯による光の照射範囲よりも前方の路面を光の照射範囲に含む追加的な光源セグメントを備え、対向車の存在を検知しているときにも前記追加的な光源セグメントを点灯させるIn the present invention, as a plurality of light source segments installed in the vehicle, in addition to the light source segment that directs light in a direction parallel to the road surface, it is installed diagonally downward on the opposite lane side of the vehicle and intersects the road surface. It is equipped with an additional light source segment that includes the road surface in front of the light irradiation range of the passing illumination lamp in the light irradiation range, and the additional light source segment can detect the presence of an oncoming vehicle. Turn on the light source segment .

なお、「対向車線側」とは、道路の中央線側、車両の運転席側、左側通行を採用している国または地域においては車両の運転席から見て右側(車両の前方から見て左側)を指す。「反対向車線側」とは、対向車線側と反対側、即ち車道外側線側(自車線に隣接する路肩、路側帯または歩道の側)、車両の運転席とは反対側(助手席側)、左側通行を採用している国または地域においては運転席から見て左側(車両の前方から見て右側)を指す。 The "oncoming lane side" means the center line side of the road, the driver's seat side of the vehicle, or the right side of the driver's seat in the country or region where left-hand traffic is adopted (the left side as viewed from the front of the vehicle. ). “Anti-opposite lane side” means the opposite side of the oncoming lane side, that is, the outside side of the roadway (the shoulder, roadside belt, or sidewalk side adjacent to the own lane), the side opposite to the driver's seat of the vehicle (passenger side). , In countries or regions where left-hand traffic is adopted, it refers to the left side when viewed from the driver's seat (right side when viewed from the front of the vehicle).

本発明によれば、多数個の光源を必要とせず、対向車が存在していても自車線を適切に照明でき、また先行車が存在していても一定距離までは前方を照明できるような走行用前照灯を実現することができる。 According to the present invention, it is possible to properly illuminate the own lane even when an oncoming vehicle exists and to illuminate the front side up to a certain distance even when a preceding vehicle exists, without requiring a large number of light sources. It is possible to realize a headlight for traveling.

本実施形態において車両の反対向車線側(左側)の部位に設置する複数の光源セグメントの配光パターンの例を模式的に示す平面図。The top view which shows typically the example of the light distribution pattern of the some light source segment installed in the site|part on the opposite lane side (left side) of a vehicle in this embodiment. 同実施形態の車両の反対向車線側の部位に設置する複数の光源セグメントの配光パターンを車両に正対するスクリーンに投影した状態を模式的に示す図。The figure which shows typically the state which projected the light distribution pattern of the some light source segment installed in the site|part on the opposite lane side of the vehicle of the same embodiment on the screen facing the vehicle. 同実施形態の車両の反対向車線側の部位に設置する特定の光源セグメントの照明光の照射範囲を模式的に示す側面図。The side view which shows typically the irradiation range of the illumination light of the specific light source segment installed in the site|part on the opposite lane side of the vehicle of the same embodiment. 同実施形態において車両の対向車線側(右側)の部位に設置する複数の光源セグメントの配光パターンの例を模式的に示す平面図。FIG. 3 is a plan view schematically showing an example of a light distribution pattern of a plurality of light source segments installed in a portion on the opposite lane side (right side) of the vehicle in the same embodiment. 同実施形態の車両の対向車線側の部位に設置する複数の光源セグメントの配光パターンを車両に正対するスクリーンに投影した状態を模式的に示す図。The figure which shows typically the state which projected the light distribution pattern of the some light source segment installed in the site|part by the opposite lane side of the vehicle of the same embodiment on the screen facing the vehicle. 同実施形態において対向車が存在する状況下での複数の光源セグメントの点灯/消灯の状態を模式的に示す平面図。FIG. 3 is a plan view schematically showing a lighting/extinguishing state of a plurality of light source segments in a situation where an oncoming vehicle exists in the same embodiment. 同実施形態において先行車が存在する状況下での複数の光源セグメントの点灯/消灯の状態を模式的に示す平面図。FIG. 3 is a plan view schematically showing a lighting/extinguishing state of a plurality of light source segments in a situation where a preceding vehicle is present in the same embodiment.

本発明の一実施形態を、図面を参照して説明する。本実施形態の車両Cの走行用前照灯は、車両Cの前端部における左右の側部にそれぞれ複数個の光源セグメントを設置してなるものである。各光源セグメントは、照明光を放射する照明光源、例えば発光ダイオードと、照明光源から放射される照明光を車両Cの前方に向けるリフレクタ(図示せず)とを要素とする。各光源セグメントの照明光源は、互いに独立に点灯/消灯させることが可能である。 An embodiment of the present invention will be described with reference to the drawings. The traveling headlamp of the vehicle C according to the present embodiment is provided with a plurality of light source segments installed on the left and right side portions of the front end portion of the vehicle C, respectively. Each light source segment includes an illumination light source that emits illumination light, for example, a light emitting diode, and a reflector (not shown) that directs the illumination light emitted from the illumination light source toward the front of the vehicle C. The illumination light sources of each light source segment can be turned on/off independently of each other.

本実施形態の走行用前照灯は、車両Cの左側部及び右側部に四個ずつ光源セグメントを備えている。図1ないし図5に、各光源セグメントの配光パターンの一例を示す。なお、この図示例の配光パターンは、左側通行を採用する国または地域を想定したものであり、右側通行を採用する国または地域に適用する際にはこれを左右反転させる必要がある。 The traveling headlamp of the present embodiment includes four light source segments on the left side and right side of the vehicle C. 1 to 5 show an example of the light distribution pattern of each light source segment. It should be noted that the light distribution pattern of this illustrated example is based on the assumption of a country or region that adopts left-hand traffic, and it needs to be reversed when applied to a country or region that employs right-hand traffic.

従来の車両の走行用前照灯では、運転席から見て、左側に設置した光源セグメントが主として車両中心線よりも左方の領域つまりは自車線CLの路肩側を照らし、右側に設置した光源セグメントが主として車両中心線よりも右方の領域つまりは対向車線側を照らしていた。このようなものであると、配光可変型前照灯システムが対向車の存在を検出したとき、当該対向車に対して強い光を照射しないために、右側の光源セグメントの大半を消灯することとなる。結果、車両の前方、特に自車線CLの右半部を照明する光量が減少し、遠方の障害物の視認性が低下するおそれがあった。対向車の搭乗者を眩惑させることを回避し、かつ遠方の障害物の視認性を十分に確保するには、光源セグメントの個数を増やさざるを得ないが、光源セグメント数の増加はコストの増大に直結する。 In the conventional vehicle headlight, when viewed from the driver's seat, the light source segment installed on the left side mainly illuminates the area on the left side of the vehicle center line, that is, the shoulder side of the own lane CL, and the light source installed on the right side. The segment mainly illuminated the area to the right of the vehicle center line, that is, the opposite lane side. When this is the case, when the variable light distribution headlight system detects the presence of an oncoming vehicle, most of the light source segment on the right side should be turned off in order not to emit strong light to the oncoming vehicle. Becomes As a result, the amount of light that illuminates the front of the vehicle, particularly the right half of the own lane CL, may decrease, and the visibility of obstacles in the distance may decrease. In order to avoid dazzling passengers of oncoming vehicles and to secure sufficient visibility of distant obstacles, the number of light source segments must be increased, but an increase in the number of light source segments increases cost. Directly connected to.

これに対し、本実施形態では、運転席から見て、左側に設置した光源セグメントが車両中心線よりも右方の領域つまりは対向車線側を照らし、右側に設置した光源セグメントが車両中心線よりも左方の領域つまりは自車線CLの路肩側を照らすように配光している。 On the other hand, in the present embodiment, when viewed from the driver's seat, the light source segment installed on the left side illuminates the area on the right side of the vehicle center line, that is, on the opposite lane side, and the light source segment installed on the right side is more than the vehicle center line. Is also distributed so as to illuminate the left region, that is, the road shoulder side of the own lane CL.

詳述すると、運転者から見て左側に設置した第一光源セグメント、第二光源セグメント、第三光源セグメント及び第四光源セグメントの四個の光源セグメントのうち、第一光源セグメントは、自車線CLに沿った前方を照明する。図2に示す例に則して述べると、第一光源セグメントから放たれる照明光10を車両Cに正対する(車両Cの進行方向と直交する)スクリーンに投影して運転席から(車両Cの前方に向かって)見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aと車両Cの前端部との交点を基点として右方に少しく偏倚した角度(例えば、右方に2°)から左方に偏倚した角度(例えば、左方に5°)までの領域が、その照明光10の照射範囲に含まれる。 More specifically, of the four light source segments, the first light source segment, the second light source segment, the third light source segment, and the fourth light source segment, which are installed on the left side of the driver, the first light source segment is the own lane CL. Illuminate the front along. According to the example shown in FIG. 2, the illumination light 10 emitted from the first light source segment is projected onto a screen that faces the vehicle C (orthogonally to the traveling direction of the vehicle C) and is projected from the driver's seat (the vehicle C When viewed from the front of the vehicle C), an angle slightly deviated to the right (eg, to the right) from the intersection of the vertical plane A parallel to the traveling direction of the vehicle C and the front end of the vehicle C as the base point. 2°) to an angle deviated to the left (for example, 5° to the left) is included in the irradiation range of the illumination light 10.

第二光源セグメントは、自車線CLよりも寧ろ対向車線OLを照明する。第二光源セグメントから放たれる照明光20を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aから右方に偏倚した領域(例えば、鉛直面Aと車両Cの前端部との交点を基点として右方に5°の角度から右方に1°の角度まで)が、その照明光20の照射範囲に含まれる。 The second light source segment illuminates the oncoming lane OL rather than the own lane CL. When the illumination light 20 emitted from the second light source segment is projected on a screen facing the vehicle C and seen from the driver's seat, the vertical direction A parallel to the traveling direction of the vehicle C, including the vehicle center line, is displaced to the right. The area (for example, from the angle of 5° to the right to the angle of 1° to the right with the intersection of the vertical plane A and the front end of the vehicle C as a base point) is included in the irradiation range of the illumination light 20.

第三光源セグメントは、運転席から見て、第二光源セグメントが照明する領域よりもさらに右方の領域を照明する。その光軸は、車両Cの前方100m超の地点の対向車線OLの路肩の辺りを指向する。第三光源セグメントから放たれる照明光30を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aから右方により偏倚した領域(例えば、鉛直面Aと車両Cの前端部との交点を基点として右方に10°の角度から右方に3°の角度まで)が、その照明光30の照射範囲に含まれる。第二光源セグメント及び第三光源セグメントの光軸は、車両中心線を含む鉛直面Aよりも右方を指向している。これら第二光源セグメント及び第三光源セグメントは、車両中心線を含む鉛直面Aよりも右側(特に、対向車線OL)に存在する障害物を照明するものであり、車両中心線を含む鉛直面Aよりも左側(特に、自車線CL及びその路肩)に存在する障害物を積極的に照明しようとしていない。図1に示しているように、第二光源セグメント及び第三光源セグメントは、運転者から見て車両Cの左側端よりも左方に照明光20、30を照射しない。 The third light source segment illuminates a region further to the right of the region illuminated by the second light source segment when viewed from the driver's seat. The optical axis points around the road shoulder of the oncoming lane OL at a point more than 100 m ahead of the vehicle C. When the illumination light 30 emitted from the third light source segment is projected on a screen directly facing the vehicle C and seen from the driver's seat, it is displaced to the right from a vertical plane A including the vehicle center line and parallel to the traveling direction of the vehicle C. The area (for example, from the angle of 10° to the right to the angle of 3° to the right from the intersection of the vertical plane A and the front end of the vehicle C as a base point) is included in the irradiation range of the illumination light 30. The optical axes of the second light source segment and the third light source segment are directed to the right of the vertical plane A including the vehicle center line. The second light source segment and the third light source segment illuminate an obstacle existing on the right side of the vertical plane A including the vehicle center line (in particular, oncoming lane OL), and the vertical plane A including the vehicle center line. Obstacles existing on the left side (particularly, the own lane CL and the shoulder thereof) are not actively attempted to be illuminated. As shown in FIG. 1, the second light source segment and the third light source segment do not emit the illumination light 20, 30 to the left of the left end of the vehicle C when viewed from the driver.

並びに、第四光源セグメントは、自車線CLに沿った前方を照明する。第四光源セグメントから放たれる照明光40を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aと車両Cの前端部との交点を基点として右方に偏倚した角度(例えば、右方に3°)から左方に偏倚した角度(例えば、左方に3°)までの領域が、その照明光40の照射範囲に含まれる。 In addition, the fourth light source segment illuminates the front side along the own lane CL. When the illumination light 40 emitted from the fourth light source segment is projected on a screen facing the vehicle C and seen from the driver's seat, the vertical plane A parallel to the traveling direction of the vehicle C and the front end of the vehicle C including the vehicle center line. The irradiation range of the illumination light 40 is an area from an angle offset to the right (for example, 3° to the right) to an angle offset to the left (for example, 3° to the left) with the intersection with the section as a base point. include.

運転者から見て左側に設置した光源セグメントによる照明光10、20、30、40の照射範囲の分解能は、車両中心線を含む鉛直面Aよりも右方においてより細かく、車両中心線を含む鉛直面Aよりも左方においてより粗い。つまり、運転者から見て左側に設置した各光源セグメントの照明光源の点灯/消灯の切り換えを通じて、車両中心線を含む鉛直面Aよりも右方における照明光10、20、30、40の照射範囲を細かく制御することが可能である。 The resolution of the irradiation range of the illumination light 10, 20, 30, 40 by the light source segment installed on the left side when viewed from the driver is finer on the right side than the vertical plane A including the vehicle center line, and is vertical along the vehicle center line. Rougher to the left than surface A. That is, the irradiation range of the illumination light 10, 20, 30, 40 on the right side of the vertical plane A including the vehicle center line is switched by turning on/off the illumination light source of each light source segment installed on the left side of the driver. Can be finely controlled.

第一光源セグメント、第二光源セグメント及び第三光源セグメントの光軸は、水平方向即ち路面と平行な方向に設定する。第一光源セグメント、第二光源セグメント及び第三光源セグメントが放つ照明光10、20、30は、既存の走行用前照灯と同様に車両Cの前方を正射、即ち路面と平行な方向(水平方向)ないしそれよりも上方に向かう。他方、第四光源セグメントの光軸は、路面と交差する斜め下方を向き、路面との交差地点において車両中心線を含む鉛直面Aまたはその近傍に到達するように設定する。図3に示しているように、第四光源セグメントが放つ照明光40は、主として路面と平行な方向よりも下方に向かい(但し、路面と平行な方向ないしそれよりも上方に向けて、人の目を眩惑させない程度の減光された光が放射されることはあり得る)、車両Cの前方50mないしその数m手前の地点から100m超(例えば、120m)の地点までの路面及び当該路面上に存在する障害物を照明する。この第四光源セグメントは、車両Cに装備されたすれ違い用前照灯が照射する照明光90よりは遠方の領域を照明する、いわばハイビームとロービームとの中間の「ミドルビーム」となる。 The optical axes of the first light source segment, the second light source segment, and the third light source segment are set in the horizontal direction, that is, the direction parallel to the road surface. The illumination lights 10, 20, and 30 emitted by the first light source segment, the second light source segment, and the third light source segment are orthogonal to the front of the vehicle C, that is, in the direction parallel to the road surface (like the existing headlights for traveling). Horizontally) or upward. On the other hand, the optical axis of the fourth light source segment is directed obliquely downward so as to intersect the road surface, and is set so as to reach the vertical plane A including the vehicle center line or the vicinity thereof at the intersection with the road surface. As shown in FIG. 3, the illumination light 40 emitted by the fourth light source segment is mainly directed downward in a direction parallel to the road surface (however, in a direction parallel to the road surface or upward, A dimmed light that does not dazzle the eyes may be emitted), a road surface from a point 50 m in front of the vehicle C or several meters before that to a point over 100 m (for example, 120 m) and on the road surface. Illuminates obstacles present in. The fourth light source segment is a so-called "middle beam" between a high beam and a low beam, which illuminates a region farther than the illumination light 90 emitted by the passing headlight mounted on the vehicle C.

運転者から見て右側に設置した第五光源セグメント、第六光源セグメント、第七光源セグメント及び第八光源セグメントの四個の光源セグメントのうち、第五光源セグメントは、運転席から見て大きく左方に偏倚した領域を照明する。その光軸は、車両Cの前方100m超の地点の自車線CLの路肩の辺りを指向する。図5に示す例に則して述べると、第五光源セグメントから放たれる照明光50を車両Cに正対するスクリーンに投影して運転席から(車両Cの前方に向かって)見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aから左方に偏倚した領域(例えば、鉛直面Aと車両Cの前端部との交点を基点として左方に10°の角度から左方に4°の角度まで)が、その照明光50の照射範囲に含まれる。 Of the four light source segments, the fifth light source segment, the sixth light source segment, the seventh light source segment and the eighth light source segment, which are installed on the right side when viewed from the driver, the fifth light source segment is largely left when viewed from the driver's seat. Illuminate areas that are biased toward one side. The optical axis points around the road shoulder of the own lane CL at a point more than 100 m ahead of the vehicle C. According to the example shown in FIG. 5, when the illumination light 50 emitted from the fifth light source segment is projected on the screen facing the vehicle C and viewed from the driver's seat (front of the vehicle C), A region that is offset to the left from a vertical plane A that includes the vehicle center line and is parallel to the traveling direction of the vehicle C (for example, from the angle of 10° to the left from the intersection of the vertical plane A and the front end of the vehicle C to the left). The angle of up to 4° is included in the irradiation range of the illumination light 50.

第六光源セグメントは、運転席から見て、第五光源セグメントが照明する領域よりはやや右方即ち車両中心線寄りの領域、車両Cの前方100m程度の地点までの自車線CLの左半部を含む領域を照明する。第六光源セグメントから放たれる照明光60を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aから左方に偏倚した領域(例えば、鉛直面Aと車両Cの前端部との交点を基点として左方に5°の角度から左方に2°の角度まで)が、その照明光60の照射範囲に含まれる。 The sixth light source segment is, from the driver's seat, slightly to the right of the region illuminated by the fifth light source segment, that is, a region closer to the vehicle center line, the left half of the own lane CL to a point about 100 m in front of the vehicle C. Illuminate the area containing. When the illumination light 60 emitted from the sixth light source segment is projected on a screen directly facing the vehicle C and seen from the driver's seat, the deviation from the vertical plane A parallel to the traveling direction of the vehicle C to the left side including the vehicle center line. The area (for example, from the angle of 5° to the left to the angle of 2° to the left with the intersection of the vertical plane A and the front end of the vehicle C as the base point) is included in the irradiation range of the illumination light 60.

第七光源セグメントは、運転席から見て、第六光源セグメントが照明する領域よりもやや右方、自車線CLの大半部を含む領域を照明する。第七光源セグメントから放たれる照明光70を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aから左方に偏倚した領域(例えば、鉛直面Aと車両Cの前端部との交点を基点として左方に4°の角度から左方に1°の角度まで)が、その照明光70の照射範囲に含まれる。第五光源セグメント、第六光源セグメント及び第七光源セグメントの光軸は、車両中心線を含む鉛直面Aよりも左方を指向している。これら第五光源セグメント、第六光源セグメント及び第七光源セグメントは、車両中心線を含む鉛直面Aよりも左側(特に、自車線CL及びその路肩)に存在する障害物を照明するものであり、車両中心線を含む鉛直面Aよりも右側(特に、対向車線OL及びその路肩)に存在する障害物を積極的に照明しようとしていない。図4に示しているように、第五光源セグメント、第六光源セグメント及び第七光源セグメントは、運転者から見て車両Cの右側端よりも右方に照明光50、60、70を照射しない。 The seventh light source segment illuminates an area that is slightly right of the area illuminated by the sixth light source segment as viewed from the driver's seat and includes most of the own lane CL. When the illumination light 70 emitted from the seventh light source segment is projected on a screen directly facing the vehicle C and seen from the driver's seat, the deviation from the vertical plane A including the vehicle center line and parallel to the traveling direction of the vehicle C to the left side. The area (for example, from the angle of 4° to the left to the angle of 1° to the left with the intersection of the vertical plane A and the front end of the vehicle C as the base point) is included in the irradiation range of the illumination light 70. The optical axes of the fifth light source segment, the sixth light source segment, and the seventh light source segment are directed to the left of the vertical plane A including the vehicle center line. The fifth light source segment, the sixth light source segment, and the seventh light source segment illuminate an obstacle existing on the left side of the vertical plane A including the vehicle center line (particularly, the own lane CL and its shoulder). Obstacles existing on the right side of the vertical plane A including the vehicle center line (in particular, the oncoming lane OL and the shoulder thereof) are not being actively illuminated. As shown in FIG. 4, the fifth light source segment, the sixth light source segment, and the seventh light source segment do not emit the illumination light 50, 60, 70 to the right of the right end of the vehicle C when viewed from the driver. ..

並びに、第八光源セグメントは、自車線CLに沿った前方を照明する。第八光源セグメントから放たれる照明光80を車両Cに正対するスクリーンに投影して運転席から見たとき、車両中心線を含み車両Cの進行方向と平行な鉛直面Aと車両Cの前端部との交点を基点として左方に少しく偏倚した角度(例えば、左方に2°)から右方に偏倚した角度(例えば、右方に5°)までの領域が、その照明光80の照射範囲に含まれる。 In addition, the eighth light source segment illuminates the front side along the own lane CL. When the illumination light 80 emitted from the eighth light source segment is projected on the screen facing the vehicle C and seen from the driver's seat, the vertical plane A parallel to the traveling direction of the vehicle C and the front end of the vehicle C including the vehicle center line. Irradiation of the illumination light 80 is an area from an angle slightly deviated to the left (for example, 2° to the left) to an angle deviated to the right (for example, 5° to the right) from the intersection with the base as a base point. Included in the range.

運転者から見て右側に設置した光源セグメントによる照明光50、60、70、80の照射範囲の分解能は、車両中心線を含む鉛直面Aよりも左方においてより細かく、車両中心線を含む鉛直面Aよりも右方においてより粗い。つまり、運転者から見て右側に設置した各光源セグメントの照明光源の点灯/消灯の切り換えを通じて、車両中心線を含む鉛直面Aよりも左方における照明光50、60、70、80の照射範囲を細かく制御することが可能である。 The resolution of the irradiation range of the illumination light 50, 60, 70, 80 by the light source segment installed on the right side when viewed from the driver is finer on the left side than the vertical plane A including the vehicle center line, and is vertical along the vehicle center line. Rougher to the right than surface A. That is, the irradiation range of the illumination light 50, 60, 70, 80 on the left side of the vertical plane A including the vehicle center line is switched by turning on/off the illumination light source of each light source segment installed on the right side of the driver. Can be finely controlled.

第五光源セグメント、第六光源セグメント、第七光源セグメント及び第三光源セグメントの光軸は、水平方向即ち路面と平行な方向に設定する。第五光源セグメント、第六光源セグメント、第七光源セグメント及び第八光源セグメントが放つ照明光50、60、70、80は、既存の走行用前照灯と同様、車両Cの前方そして無限遠方を正射する。 The optical axes of the fifth light source segment, the sixth light source segment, the seventh light source segment and the third light source segment are set in the horizontal direction, that is, the direction parallel to the road surface. The illumination light 50, 60, 70, 80 emitted by the fifth light source segment, the sixth light source segment, the seventh light source segment, and the eighth light source segment is emitted in front of the vehicle C and at infinity as in the existing driving headlights. Orthogonal.

本実施形態における車両Cの配光可変型前照灯システムの制御を司る電子制御装置(Electronic Control Unit)0は、車両Cの前方を撮影することのできる車載カメラ(イメージセンサ)で撮影した動画像を解析し(当該画像内に現れる対向車Oの前照灯や先行車Fの尾灯を検出する等して)、対向車線OLを走行する対向車O及び/または自車線CLを走行する先行車Fの存在を認識する。そして、その対向車O及び/または先行車Fに対して照明光10、20、30、40、50、60、70、80を照射することとなる光源セグメントの照明光源を適時消灯しながら、それ以外の光源セグメントの照明光源を点灯させた状態に維持する。 The electronic control unit 0 that controls the light distribution variable headlight system of the vehicle C according to the present embodiment is a moving image captured by an in-vehicle camera (image sensor) capable of capturing the front of the vehicle C. The image is analyzed (by detecting the headlight of the oncoming vehicle O and the taillight of the preceding vehicle F appearing in the image, etc.), and the oncoming vehicle O traveling on the oncoming lane OL and/or the leading vehicle traveling on the own lane CL. Recognize the existence of car F. Then, while turning off the illumination light source of the light source segment that will illuminate the oncoming vehicle O and/or the preceding vehicle F with the illumination light 10, 20, 30, 40, 50, 60, 70, 80, The illumination light sources of the light source segments other than are maintained in the turned-on state.

例えば、図6に示すように、車両Cの前方200m付近の地点における対向車線OL上に対向車Oが存在するときには、当該対向車Oを照明光10、20、80の照射範囲に捉えた光源セグメント、即ち第一光源セグメント、第二光源セグメント及び第八光源セグメント(の照明光源)を消灯しつつ、当該対向車Oを照明光30、40、50、60、70の照射範囲に捉えていない光源セグメント、即ち第三光源セグメント、第四光源セグメント、第五光源セグメント、第六光源セグメント及び第七光源セグメント(の照明光源)を点灯させる。これにより、車両Cの前方を照明する光量を必要十分に確保しながらも、対向車Oの搭乗者を眩惑させることを回避できる。以後、対向車Oとの距離が縮まるにつれて、対向車Oを照明光10、20、30、40、50、60、70、80の照射範囲に捉える光源セグメントが変化するので、その都度消灯する光源セグメント及び点灯する光源セグメントを切り換えてゆく。 For example, as shown in FIG. 6, when an oncoming vehicle O is present on the oncoming lane OL at a point near 200 m in front of the vehicle C, a light source capturing the oncoming vehicle O in the irradiation range of the illumination light 10, 20, 80. While the segments, that is, the first light source segment, the second light source segment, and the eighth light source segment (the illumination light sources thereof) are turned off, the oncoming vehicle O is not captured in the irradiation range of the illumination light 30, 40, 50, 60, 70. The light source segments, that is, the third light source segment, the fourth light source segment, the fifth light source segment, the sixth light source segment, and the seventh light source segment (illumination light sources thereof) are turned on. As a result, it is possible to avoid dazzling the passenger of the oncoming vehicle O while securing a necessary and sufficient amount of light for illuminating the front of the vehicle C. After that, as the distance to the oncoming vehicle O decreases, the light source segment that captures the oncoming vehicle O within the irradiation range of the illumination light 10, 20, 30, 40, 50, 60, 70, 80 changes, and thus the light source is turned off each time. The segment and the light source segment to be turned on are switched.

また、図7に示すように、車両Cの前方200m付近の地点における自車線CL上に先行車Fが存在するときには、当該先行車Fを照明光10、70、80の照射範囲に捉えた光源セグメント、即ち第一光源セグメント、第七光源セグメント及び第八光源セグメント(の照明光源)を消灯しつつ、当該対向車Oを照明光20、30、40、50、60の照射範囲に捉えていない光源セグメント、即ち第二光源セグメント、第三光源セグメント、第四光源セグメント、第五光源セグメント及び第六光源セグメント(の照明光源)を点灯させる。これにより、車両Cの前方を照明する光量を必要十分に確保しながらも、先行車Fの搭乗者を眩惑させることを回避できる。先行車Fとの距離が変化した際には、先行車Fを照明光10、20、30、40、50、60、70、80の照射範囲に捉える光源セグメントが変化するので、その都度消灯する光源セグメント及び点灯する光源セグメントを切り換える。 Further, as shown in FIG. 7, when a preceding vehicle F is present on the own lane CL at a point near 200 m in front of the vehicle C, a light source that captures the preceding vehicle F within the irradiation range of the illumination light 10, 70, 80. While the segments, that is, the first light source segment, the seventh light source segment, and the eighth light source segment (illumination light sources thereof) are turned off, the oncoming vehicle O is not captured in the irradiation range of the illumination light 20, 30, 40, 50, 60. The light source segments, that is, the second light source segment, the third light source segment, the fourth light source segment, the fifth light source segment, and the sixth light source segment (illumination light sources thereof) are turned on. As a result, it is possible to avoid dazzling the passenger of the preceding vehicle F while securing a necessary and sufficient amount of light for illuminating the front of the vehicle C. When the distance to the preceding vehicle F changes, the light source segment that captures the preceding vehicle F in the irradiation range of the illumination light 10, 20, 30, 40, 50, 60, 70, 80 changes, and therefore turns off each time. The light source segment and the light source segment to be turned on are switched.

本実施形態では、車両Cにおける車両中心線よりも対向車線側(運転者から見て右側)の部位に設置する複数の光源セグメントのうち、自車線CLまたは自車線CLよりも反対向車線側(運転者から見て左側)を指向して光50、60、70を照射する光源セグメント(第五光源セグメント、第六光源セグメント、第七光源セグメント)の数を、対向車線側(運転者から見て右側)を指向して光80を照射する光源セグメント(第八光源セグメント)の数よりも多くした走行用前照灯を構成した。 In the present embodiment, among the plurality of light source segments installed on the side of the vehicle C on the opposite lane side (right side as viewed from the driver) of the vehicle center line, the vehicle lane CL or the opposite lane side of the vehicle lane CL (on the opposite lane side). The number of light source segments (fifth light source segment, sixth light source segment, seventh light source segment) that direct light 50, 60, 70 toward the left side when viewed from the driver is determined by the number of opposite lanes (viewed from the driver). The number of light source segments (eighth light source segment) that direct light 80 toward the right side) is increased.

本実施形態によれば、対向車Oの搭乗者の眩惑を回避するべく対向車Oに向けて照明光10、20、30、40、80を照射する光源セグメントを消灯したとしても、点灯状態にある他の光源セグメントが、車両Cの前方(特に、自車線CLの右半部)を必要十分に照明することができる。換言すれば、対向車Oが存在する状況下において、消灯する光源セグメントの個数を減らし、点灯させて自車線CL及び自車線CLの路肩を照明する光源セグメントの個数を増すことができる。従って、夜間走行における障害物の視認性が改善し、ひいては夜間走行の安全性が向上する。そして、照明光量を増すために多数個の光源セグメントを車両Cに設置する必要はなく、低コストで有用な配光可変型前照灯システムを構築することが可能となる。 According to the present embodiment, even if the light source segment that illuminates the oncoming vehicle O with the illumination light 10, 20, 30, 40, 80 is turned off in order to avoid the dazzling of the passengers of the oncoming vehicle O, it is turned on. A certain other light source segment can illuminate the front of the vehicle C (in particular, the right half of the own lane CL) sufficiently. In other words, in the situation where the oncoming vehicle O exists, the number of light source segments that are turned off can be reduced, and the number of light source segments that are turned on to illuminate the own lane CL and the shoulders of the own lane CL can be increased. Therefore, the visibility of obstacles during night driving is improved, and thus the safety of night driving is improved. Further, it is not necessary to install a large number of light source segments in the vehicle C in order to increase the amount of illumination light, and it is possible to construct a useful variable light distribution headlamp system at low cost.

加えて、車両Cの対向車線側の部位に設置した光源セグメントが車両中心線よりも反対向車線側、即ち自車線CLないし自車線CLの路肩を照らす一方、車両Cの反対向車線側の部位に設置した光源セグメントが車両中心線よりも対向車線側、即ち対向車線OLないし対向車線OLの路肩を照らすというように、光軸がクロスする配光パターンと採用したため、先行車Fがある程度の距離まで接近してきたとしても、多くの光源セグメントを消灯せず点灯させた状態に維持することが可能となる。遠方に位置する先行車Fがカーブに差し掛かったときにも、光源セグメントが放つ照明光が当該先行車Fに当たりにくく、当該先行車Fの搭乗者を眩惑させない。 In addition, the light source segment installed on the opposite lane side of the vehicle C illuminates the opposite lane side of the vehicle center line, that is, the own lane CL or the shoulder of the own lane CL, while the opposite side lane side of the vehicle C is located. Since the light source segment installed on the vehicle illuminates the opposite lane side of the vehicle center line, that is, the opposite lane OL or the road shoulder of the opposite lane OL, the light distribution pattern is such that the optical axes cross each other. Even if they approach each other, many light source segments can be maintained in a lit state without being turned off. Even when a distant preceding vehicle F approaches a curve, the illumination light emitted by the light source segment hardly hits the preceding vehicle F, and the passengers of the preceding vehicle F are not dazzled.

並びに、本実施形態では、車両Cにおける車両中心線よりも反対向車線側(運転者から見て左側)の部位に設置する複数の光源セグメントとして、路面と平行な方向を指向して光10、20、30を照射する光源セグメント(第一光源セグメント、第二光源セグメント、第三光源セグメント)と、路面と交差する斜め下方を指向して光40を照射し、車両Cの前方50mの地点から100mの地点までの路面を光40の照射範囲に含む光源セグメント(第四光源セグメント)とを備えた走行用前照灯を構成した。 In addition, in the present embodiment, as the plurality of light source segments installed on a portion of the vehicle C on the side opposite to the opposite lane (on the left side when viewed from the driver) with respect to the vehicle center line, the light 10, which is directed in a direction parallel to the road surface, A light source segment (first light source segment, second light source segment, third light source segment) that irradiates 20, 30 and light 40 that is directed obliquely downward crossing the road surface, is emitted from a point 50 m in front of the vehicle C. A traveling headlamp including a light source segment (fourth light source segment) including a road surface up to a point of 100 m in an irradiation range of the light 40 was configured.

本実施形態によれば、遠方の先行車Fの存在を検知したときに直ちに車両Cの前方の照明を走行用前照灯からすれ違い用前照灯に切り換えるのではなく、先行車Fとの距離が100m程度に接近するまで後者の光源セグメントを消灯せず点灯させた状態に維持することが可能となり、照明光40の照射範囲を急変させずに済む。 According to the present embodiment, when the presence of the distant preceding vehicle F is detected, the illumination in front of the vehicle C is not immediately switched from the traveling headlight to the passing headlight, but the distance from the preceding vehicle F is increased. It is possible to maintain the latter light source segment in a lighted state without turning off until it approaches 100 m, and it is not necessary to suddenly change the irradiation range of the illumination light 40.

車両Cの前方40m付近の路面に向けて光を照射するすれ違い用前照灯では、車両Cの前方50m以遠の地点に存在する障害物を照明することができない。先行車Fの搭乗者を眩惑させないために、走行用前照灯を使用せずすれ違い用前照灯を使用することは、夜間の走行中に前方の障害物の発見が遅れるリスクを増大させる。本実施形態のように、走行用前照灯の構成要素として、路面と交差する斜め下方を指向して光40を照射しすれ違い用照明灯による光の照射範囲よりも前方の路面を光40の照射範囲に含む光源セグメント、例えば車両Cの前方50mの地点から100mの地点までの路面を光40の照射範囲に含む光源セグメントを設けておけば、当該光源セグメントを点灯させつつ他の光源セグメントを必要に応じて消灯し、先行車Fの搭乗者の眩惑を回避しながら、車両Cの前方50m以遠の地点に存在する障害物を照明してその視認性を高めることができる。 The passing headlight that emits light toward the road surface in the vicinity of 40 m in front of the vehicle C cannot illuminate an obstacle existing at a point more than 50 m in front of the vehicle C. In order to prevent the passengers of the preceding vehicle F from being dazzled, using the passing headlight instead of the traveling headlight increases the risk of delaying the detection of obstacles ahead while driving at night. As in the present embodiment, as a component of the traveling headlight, the light 40 is directed obliquely downward intersecting with the road surface, and the road surface ahead of the light irradiation range of the light for passing light is projected. If a light source segment included in the irradiation range, for example, a light source segment including the road surface from a point 50 m in front of the vehicle C to a point 100 m in the irradiation range of the light 40 is provided, other light source segments are turned on while lighting the light source segment. It is possible to illuminate an obstacle existing at a position 50 m or more in front of the vehicle C and enhance its visibility while turning off the light as necessary and avoiding the dazzling of the passenger of the preceding vehicle F.

また、上述の第四光源セグメントは、車載のカメラで撮影した画像を解析して車両Cの前方の障害物の存在を認識し、車両Cが当該障害物に衝突する直前に車両Cを自動で制動する衝突被害軽減ブレーキシステムの性能向上にも寄与する。走行用前照灯に代えてすれ違い用前照灯を点灯させる場合と、走行用前照灯の第四光源セグメントを点灯させる場合とでは、後者の方がより遠方の障害物を照明することが可能であり、その分だけシステムが早期に障害物の存在を認識するに至り、特に高速走行時の障害物への衝突回避の確実性が増すことになる。 In addition, the above-mentioned fourth light source segment recognizes the presence of an obstacle in front of the vehicle C by analyzing an image captured by a vehicle-mounted camera, and automatically detects the vehicle C immediately before the vehicle C collides with the obstacle. It also contributes to improving the performance of the braking system for mitigating collision damage. In the case of lighting the passing headlight instead of the traveling headlight and in the case of lighting the fourth light source segment of the traveling headlight, the latter may illuminate an obstacle farther away. This is possible, and the system can recognize the existence of the obstacle as soon as possible, and the certainty of avoiding a collision with the obstacle is increased especially at high speed running.

なお、本発明は以上に詳述した実施形態に限られるものではない。光源セグメントの個数や配光パターンが、上記実施形態に限定されないことは言うまでもない。各光源セグメントから放たれる光の照射範囲(の角度、光軸の向き)は、照明光源のパワーに応じて調整する。 The present invention is not limited to the embodiment described in detail above. It goes without saying that the number of light source segments and the light distribution pattern are not limited to those in the above embodiment. The irradiation range of the light emitted from each light source segment (the angle thereof, the direction of the optical axis) is adjusted according to the power of the illumination light source.

その他、各部の具体的な構成は、本発明の趣旨を逸脱しない範囲で種々変形が可能である。 In addition, the specific configuration of each part can be modified in various ways without departing from the spirit of the present invention.

本発明は、車両に装備される走行用前照灯に適用することができる。 INDUSTRIAL APPLICABILITY The present invention can be applied to a traveling headlamp equipped on a vehicle.

10…第一光源セグメントの照明光
20…第二光源セグメントの照明光
30…第三光源セグメントの照明光
40…第四光源セグメントの照明光
50…第五光源セグメントの照明光
60…第六光源セグメントの照明光
70…第七光源セグメントの照明光
80…第八光源セグメントの照明光
A…車両中心線を含み車両の進行方向と平行な鉛直面
C…車両
CL…自車線
F…先行車
O…対向車
OL…対向車線
10... Illumination light of first light source segment 20... Illumination light of second light source segment 30... Illumination light of third light source segment 40... Illumination light of fourth light source segment 50... Illumination light of fifth light source segment 60... Sixth light source Illumination light of segment 70... Illumination light of seventh light source segment 80... Illumination light of eighth light source segment A... Vertical plane including vehicle center line and parallel to the traveling direction of vehicle C... Vehicle CL... Own lane F... Preceding vehicle O Oncoming vehicle OL... Oncoming lane

Claims (1)

車両における対向車線側の部位に設置する複数の光源セグメントのうち、自車線または自車線よりも反対向車線側を指向して光を照射する光源セグメントの数を、対向車線側を指向して光を照射する光源セグメントの数よりも多くし、
車両に設置する複数の光源セグメントとして、路面と平行な方向を指向して光を照射する光源セグメントに加え、車両における反対向車線側に設置され路面と交差する斜め下方を指向して光を照射しすれ違い用照明灯による光の照射範囲よりも前方の路面を光の照射範囲に含む追加的な光源セグメントを備えており、
対向車の存在を検知しているときにも前記追加的な光源セグメントを点灯させる車両の走行用前照灯。
Of the plurality of light source segments installed in the vehicle on the opposite lane side, the number of light source segments that direct light toward the opposite lane side or the opposite lane side relative to the own lane, and determine the number of light source segments that emit light toward the opposite lane side. Than the number of light source segments that illuminate
As a plurality of light source segments installed on the vehicle, in addition to the light source segment that directs light in a direction parallel to the road surface, it also irradiates light diagonally downward that intersects with the road surface and is installed on the opposite lane side of the vehicle. Equipped with an additional light source segment that includes the road surface in front of the light irradiation range of the light for passing light in the light irradiation range,
A vehicle headlight for turning on the additional light source segment even when the presence of an oncoming vehicle is detected .
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