JP2003031011A - Linear light source for lighting fixture - Google Patents

Linear light source for lighting fixture

Info

Publication number
JP2003031011A
JP2003031011A JP2001214778A JP2001214778A JP2003031011A JP 2003031011 A JP2003031011 A JP 2003031011A JP 2001214778 A JP2001214778 A JP 2001214778A JP 2001214778 A JP2001214778 A JP 2001214778A JP 2003031011 A JP2003031011 A JP 2003031011A
Authority
JP
Japan
Prior art keywords
linear light
light source
light emitting
lens
linear
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
Application number
JP2001214778A
Other languages
Japanese (ja)
Other versions
JP4665205B2 (en
JP2003031011A5 (en
Inventor
Yasushi Tanida
安 谷田
Toshihiro Oikawa
俊広 及川
Ryutaro Owada
竜太郎 大和田
Takuya Kushimoto
琢也 久志本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP2001214778A priority Critical patent/JP4665205B2/en
Publication of JP2003031011A publication Critical patent/JP2003031011A/en
Publication of JP2003031011A5 publication Critical patent/JP2003031011A5/ja
Application granted granted Critical
Publication of JP4665205B2 publication Critical patent/JP4665205B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Led Device Packages (AREA)
  • Led Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a linear light source best suited for a light fixture especially one for a vehicle having fine cutting of a light distribution pattern using a simple structure. SOLUTION: The hight fixture 10, consisting of a linear light source 11 arranged so as to be extended laterally, and a reflecting member 20 arranged at the rear of the linear light source, so as to reflect light from the linear light source forward includes a linear luminous part 12 constructed linearly on a substrate 15 and a lens consisting of a rotating face arranged on the luminous part, and the light source for the light tool 11 is so structured that a side edge 16a of a luminous area 16, extending in the length direction of the linear luminous part is arranged along the center of the lens 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば自動車の前
部に設けられた前照灯または補助前照灯として使用され
る車両用灯具あるいは各種照明灯等の灯具で使用される
線状光源に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear light source used for a vehicle lamp used as a headlight or an auxiliary headlight provided in a front portion of an automobile, or a lamp such as various kinds of lighting. It is a thing.

【０００２】[0002]

【従来の技術】従来、例えば自動車の前照灯は、光源
と、光源からの光を前方に向かって反射させる例えば回
転放物面から成る主反射面と、拡散レンズカットと、か
ら構成されており、光源からの光を主反射面によりほぼ
平行光に変換して、前方に向かって照明光を照射するよ
うになっている。そして、上記光源は、例えばハロゲン
バルブ，放電灯バルブ等のバルブが使用されている。こ
こで、このようなバルブは、発光部がミクロ的には線状
あるいは矩形状に形成されているが、マクロ的には点光
源として扱われる。2. Description of the Related Art Conventionally, an automobile headlight, for example, comprises a light source, a main reflection surface for reflecting the light from the light source forward, for example, a paraboloid of revolution, and a diffusion lens cut. The light from the light source is converted into substantially parallel light by the main reflection surface, and the illumination light is emitted forward. A bulb such as a halogen bulb or a discharge lamp bulb is used as the light source. Here, in such a bulb, the light emitting portion is formed in a linear or rectangular shape microscopically, but is treated as a point light source macroscopically.

【０００３】[0003]

【発明が解決しようとする課題】ところで、線状光源を
使用した車両用灯具は、例えばＬＥＤアレイを所謂ハイ
マウントストップランプとして使用するものが知られて
いる。しかしながら、このようなハイマウントストップ
ランプは、ＬＥＤアレイをそのまま自動車の後部に配置
しただけの構成であり、配光パターンを制御して利用す
るようには構成されていない。このため、線状光源であ
るＬＥＤアレイからの光は、やや拡散する傾向にある。
さらに、自動車の前照灯だけでなく、自動車の補助前照
灯やテールランプ，ドライビングランプ，バックアップ
ランプ等の信号灯や、各種照明灯等においても、線状光
源を利用した灯具は実際に使用されていない。By the way, as a vehicular lamp using a linear light source, for example, one using an LED array as a so-called high mount stop lamp is known. However, such a high mount stop lamp has a structure in which the LED array is arranged as it is at the rear part of the automobile, and is not structured to control and use the light distribution pattern. Therefore, the light from the LED array, which is a linear light source, tends to be slightly diffused.
Further, not only the headlights of automobiles, but also the auxiliary headlights of automobiles, signal lights such as tail lamps, driving lamps, backup lamps, etc., and various types of illuminating lights, the lamps using the linear light source are actually used. Absent.

【０００４】本発明は、以上の点から、簡単な構成によ
り、線状光源前方に配置したスクリーン上において、光
源前方に照射部と非照射部の境界が明確に現われるよう
な配光パターンを有する線状光源を提供することを目的
とし、特に部分的に照射エリアを制限したい光源、例え
ば車両用灯具におけるすれ違い配光用の前照灯に最適な
線状光源を提供することを目的としている。From the above point of view, the present invention has a light distribution pattern having a simple structure, in which a boundary between an irradiation part and a non-irradiation part is clearly shown in front of the light source on the screen arranged in front of the linear light source. An object of the present invention is to provide a linear light source, and particularly to provide a light source that is desired to partially limit the irradiation area, for example, an optimal linear light source for a headlight for passing light distribution in a vehicle lamp.

【０００５】[0005]

【課題を解決するための手段】上記目的は、本発明の第
一の構成によれば、横方向に延びるように配設された線
状光源と、上記線状光源からの光を前方に向かって反射
させるように、線状光源の後方に配設された反射部材
と、から成る灯具における線状光源であって、基板上に
て線状に構成された線状発光部と、その上に配置された
回転面から成るレンズと、を含んでおり、上記線状発光
部の長手方向に延びる発光領域の一側縁が、上記レンズ
の中心に沿って配置されていることを特徴とする、灯具
用線状光源により、達成される。According to the first aspect of the present invention, the above object is to provide a linear light source arranged so as to extend in a lateral direction, and to direct light from the linear light source to the front. A linear light source in a lamp comprising a reflecting member disposed behind the linear light source so that the linear light emitting portion is linearly formed on the substrate, A lens comprising a rotating surface arranged, wherein one side edge of a light emitting region extending in the longitudinal direction of the linear light emitting portion is arranged along the center of the lens. This is achieved by a linear light source for a lamp.

【０００６】本発明による灯具用線状光源は、好ましく
は、上記線状発光部が、直線状に配置された複数個の発
光素子から成る。In the linear light source for a lamp according to the present invention, preferably, the linear light emitting section is composed of a plurality of light emitting elements arranged linearly.

【０００７】本発明による灯具用線状光源は、好ましく
は、上記線状発光部が、ＬＥＤアレイである。In the linear light source for a lamp according to the present invention, preferably, the linear light emitting section is an LED array.

【０００８】本発明による灯具用線状光源は、好ましく
は、上記線状発光部が、線状に形成された面発光素子で
ある。The linear light source for a lamp according to the present invention is preferably a surface light emitting element in which the linear light emitting portion is formed in a linear shape.

【０００９】本発明による灯具用線状光源は、好ましく
は、上記線状発光部の発光面側に、線状発光部を覆うよ
うに波長変換材料層が形成されており、この波長変換材
料層の長手方向に延びる一側縁が、発光領域の一側縁と
して、上記レンズの中心に配置されている。In the linear light source for a lamp according to the present invention, preferably, a wavelength conversion material layer is formed on the light emitting surface side of the linear light emitting portion so as to cover the linear light emitting portion. The one side edge extending in the longitudinal direction is disposed at the center of the lens as one side edge of the light emitting region.

【００１０】本発明による灯具用線状光源は、好ましく
は、上記レンズが、半円筒状に形成されている。In the linear light source for a lamp according to the present invention, the lens is preferably formed in a semi-cylindrical shape.

【００１１】本発明による灯具用線状光源は、好ましく
は、上記レンズが、樹脂材料により構成されている。In the linear light source for a lamp according to the present invention, the lens is preferably made of a resin material.

【００１２】また、上記目的は、本発明の第二の構成に
よれば、横方向に延びるように配設された線状光源と、
上記線状光源からの光を前方に向かって反射させるよう
に、線状光源の後方に配設された反射部材と、から成る
灯具における線状光源であって、基板上にて直線状に配
置された複数個の発光素子から成る線状発光部と、その
上に配置され且つ各発光素子の一側縁を中心とする半円
球状のレンズと、を含んでいることを特徴とする、灯具
用線状光源により、達成される。Further, according to the second aspect of the present invention, the above object is to provide a linear light source arranged so as to extend in a lateral direction,
A linear light source in a lamp comprising a reflecting member arranged behind the linear light source so as to reflect the light from the linear light source forward, and arranged linearly on a substrate. A linear light-emitting portion including a plurality of light-emitting elements, and a hemispherical lens disposed on the light-emitting element and having a side edge of each light-emitting element as a center. This is achieved by using a linear light source.

【００１３】上記第一の構成によれば、線状発光部、好
ましくは直線状に配置された複数個の発光素子、例えば
ＬＥＤアレイまたは線状に形成された面発光素子から成
る線状発光部から出射した光は、レンズ、好ましくは半
円筒状の樹脂材料から成るレンズを介して、レンズの外
側に出射する。According to the first configuration, the linear light emitting portion, preferably a linear light emitting portion composed of a plurality of linearly arranged light emitting elements such as an LED array or a linear light emitting element. Light emitted from the lens is emitted to the outside of the lens through the lens, preferably a lens made of a semi-cylindrical resin material.

【００１４】その際、線状発光部の発光領域の一側縁か
ら出射した光は、レンズの中心から半径方向外側に向か
って出射することになるので、レンズによる屈折作用を
受けることなく、直進してレンズの外側に出射すること
になる。従って、反射部材により反射され前方に向かっ
て照射される際に、線状発光部の発光領域の境界線によ
り形成される光の配光パターンの照射領域と非照射領域
との境界のコントラストが良好となる。At this time, the light emitted from one side edge of the light emitting region of the linear light emitting portion is emitted from the center of the lens toward the outer side in the radial direction, so that it goes straight without being subjected to refraction by the lens. Then, the light is emitted to the outside of the lens. Therefore, when the light is reflected by the reflecting member and irradiated forward, the contrast of the boundary between the irradiated area and the non-irradiated area of the light distribution pattern of the light formed by the boundary line of the light emitting area of the linear light emitting portion is good. Becomes

【００１５】上記線状発光部の発光面側に、線状発光部
を覆うように波長変換材料層が形成されており、この波
長変換材料層の長手方向に延びる一側縁が、発光領域の
一側縁として、上記レンズの中心に配置されている場合
には、線状発光部から出射した光により波長変換材料層
が励起されて、この波長変換材料層から異なる波長の光
が出射する。そして波長変換材料層から出射した光は、
同様にしてレンズの外側に出射する。A wavelength conversion material layer is formed on the light emitting surface side of the linear light emitting portion so as to cover the linear light emitting portion, and one side edge extending in the longitudinal direction of the wavelength conversion material layer is the light emitting region. When the lens is arranged at the center of the lens as one side edge, the wavelength conversion material layer is excited by the light emitted from the linear light emitting portion, and the light of different wavelengths is emitted from the wavelength conversion material layer. And the light emitted from the wavelength conversion material layer is
Similarly, the light is emitted to the outside of the lens.

【００１６】その際、発光領域としての波長変換材料層
の一側縁から出射した光は、レンズの中心から半径方向
外側に向かって出射することになるので、レンズによる
屈折作用を受けることなく、直進してレンズの外側に出
射することになる。従って、反射部材により反射され前
方に向かって照射される際に、波長変換材料層の境界線
により形成される光の配光パターンの照射領域と非照射
領域との境界のコントラストが良好となる。At this time, the light emitted from one side edge of the wavelength conversion material layer as the light emitting region is emitted from the center of the lens toward the outer side in the radial direction, so that the light is not refracted by the lens. It goes straight and goes out of the lens. Therefore, when the light is reflected by the reflecting member and irradiated forward, the contrast of the boundary between the irradiation region and the non-irradiation region of the light distribution pattern of the light formed by the boundary line of the wavelength conversion material layer becomes good.

【００１７】また、上記第二の構成によれば、線状発光
部の各発光素子から出射した光は、それぞれ対応する半
円球状のレンズを介して、レンズの外側に出射する。そ
の際、各発光素子の一側縁から出射した光は、それぞれ
対応するレンズの中心から半径方向外側に向かって出射
することになるので、レンズによる屈折作用を受けるこ
となく、直進してレンズの外側に出射することになる。
従って、反射部材により反射され前方に向かって照射さ
れる際に、線状発光部の各発光素子の境界線により形成
される光の配光パターンの照射領域と非照射領域との境
界のコントラストが良好となる。Further, according to the second configuration, the light emitted from each light emitting element of the linear light emitting portion is emitted to the outside of the lens via the corresponding hemispherical lens. At this time, the light emitted from one side edge of each light emitting element is emitted from the center of the corresponding lens toward the outer side in the radial direction. Therefore, the light does not undergo refraction by the lens and goes straight on. It will be emitted to the outside.
Therefore, when the light is reflected by the reflecting member and radiated forward, the contrast of the boundary between the irradiation region and the non-irradiation region of the light distribution pattern of the light formed by the boundary line of each light emitting element of the linear light emitting unit is It will be good.

【００１８】[0018]

【発明の実施の形態】以下、この発明の好適な実施形態
を図１乃至図１０を参照しながら、詳細に説明する。
尚、以下に述べる実施形態は、本発明の好適な具体例で
あるから、技術的に好ましい種々の限定が付されている
が、本発明の範囲は、以下の説明において特に本発明を
限定する旨の記載がない限り、これらの態様に限られる
ものではない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS.
Since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are attached, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

【００１９】図１は、本発明による灯具用線状光源の第
一の実施形態を車両用灯具に適用した構成を示してい
る。図１において、車両用灯具１０は、所謂すれ違いビ
ーム用の自動車の前照灯の水平拡散配光を形成するもの
であって、線状光源１１と、線状光源１１の後側に配設
された反射部材２０と、から構成されている。FIG. 1 shows a configuration in which a first embodiment of a linear light source for a lamp according to the present invention is applied to a vehicle lamp. In FIG. 1, a vehicular lamp 10 forms a horizontal diffused light distribution of a so-called passing beam headlight of an automobile, and is arranged on a linear light source 11 and a rear side of the linear light source 11. And a reflective member 20.

【００２０】上記線状光源１１は、図に示すように、線
状発光部を設けた基台１２と、レンズ１３と、から構成
されている。基台１２は、ＬＥＤアレイモジュール１４
から成る線状発光部を長手方向に沿って、基板１５に設
けた凹部１５ａに設置することにより、構成されてい
る。ここで、ＬＥＤアレイモジュール１４は、図２に示
すように、基板１５の凹部１５ａ内にて長手方向に並ん
で実装された複数個、例えば５乃至１０個（図示の場
合、５個）のＬＥＤチップ１６と、ＬＥＤチップ１６を
覆うように配置された波長変換材料層としての蛍光体層
１７と、から構成されている。As shown in the drawing, the linear light source 11 is composed of a base 12 provided with a linear light emitting portion and a lens 13. The base 12 is an LED array module 14
The linear light-emitting portion consisting of is installed in the recess 15a provided in the substrate 15 along the longitudinal direction. Here, as shown in FIG. 2, the LED array module 14 includes a plurality of, for example, 5 to 10 (5 in the illustrated case) LEDs mounted side by side in the recess 15 a of the substrate 15 in the longitudinal direction. It is composed of a chip 16 and a phosphor layer 17 as a wavelength conversion material layer arranged so as to cover the LED chip 16.

【００２１】上記ＬＥＤチップ１６は、例えば一辺の長
さＤ（＝１．０ｍｍ）のチップサイズの青色ＬＥＤとし
て構成されており、凹部１５ａの壁面１５ｂにその一辺
を当接させることにより、各ＬＥＤチップ１６が基板１
５の長手方向の中心から距離Ｄ／２だけ側方にずれて例
えば間隔ｄ（＝１．３ｍｍ）で配置されることによっ
て、その長手方向の一側縁１６ａが、基板１５の長手方
向の中心に沿って配置されている。The LED chip 16 is configured as a blue LED having a chip size of, for example, one side length D (= 1.0 mm), and each side is brought into contact with the wall surface 15b of the concave portion 15a. Chip 16 is substrate 1
5 are arranged laterally offset by a distance D / 2 from the center of the substrate 5 in the longitudinal direction so that one side edge 16a in the longitudinal direction is located at the center of the substrate 15 in the longitudinal direction. Are arranged along.

【００２２】上記蛍光体層１７は、例えばＹＡＧ蛍光体
から構成されており、ＬＥＤチップ１６からの照射光に
より励起されて白色光を出射するようになっている。さ
らに、上記蛍光体層１７は、その一側縁１７ａが、ＬＥ
Ｄチップ１６の一側縁１６ａと一致するように、凹部１
５ａ内に形成されている。The phosphor layer 17 is composed of, for example, a YAG phosphor, and is excited by the irradiation light from the LED chip 16 to emit white light. Further, in the phosphor layer 17, one side edge 17a thereof is LE
The recess 1 is formed so as to match the one side edge 16a of the D chip 16.
It is formed in 5a.

【００２３】また、ＬＥＤアレイモジュール１４上に
は、基板１５の表面のほぼ全体を覆うように、透明な中
間部材１８が形成され、ＬＥＤアレイモジュール１４と
レンズ１３との間の隙間の発生を防止して、光の取出し
効率が低下しないようになっている。この中間部材１８
は、レンズ１３の屈折率に近い屈折率を有する材料また
はレンズ１３とＬＥＤチップ１６の中間の屈折率を有す
る材料が光取出し効率上好ましく、例えばシリコンゲ
ル，液体状ポリマー等の柔軟な材料が使用される。A transparent intermediate member 18 is formed on the LED array module 14 so as to cover almost the entire surface of the substrate 15 to prevent a gap from being formed between the LED array module 14 and the lens 13. As a result, the light extraction efficiency does not decrease. This intermediate member 18
For the light extraction efficiency, a material having a refractive index close to that of the lens 13 or a material having an intermediate refractive index between the lens 13 and the LED chip 16 is preferable. For example, a flexible material such as silicon gel or liquid polymer is used. To be done.

【００２４】さらに、上記レンズ１３は、上記基台１２
の各ＬＥＤアレイモジュール１４の基板１５の表面全体
を覆うように、例えば透明な樹脂材料から形成されてい
る。そして、上記レンズ１３は、長手方向に延びる半円
筒状の外形を有しており、その中心軸が、上記各ＬＥＤ
チップ１６の一側縁１６ａとほぼ一致するように形成さ
れている。ここで、レンズ１３の半円筒状の半径をＲ，
ＬＥＤチップ１６の一辺の長さをＤ，臨界角をαとする
と、以下の式 Ｒ≧√２・Ｄ／ｓｉｎα に従って、半径Ｒを決定することにより、ＬＥＤチップ
１６から出射する光に関して、レンズ１３の内面におけ
る全反射を低減することができる。例えば半径Ｒを２．
１ｍｍに設定した場合、Ｄ＝１．０ｍｍ，α＝４２．５
度とすると、計算上、約８０．０％の取出し効率で有効
光を取り出すことができる。Further, the lens 13 has the base 12
Is formed of, for example, a transparent resin material so as to cover the entire surface of the substrate 15 of each LED array module 14. The lens 13 has a semi-cylindrical outer shape that extends in the longitudinal direction, and the central axis of the lens 13 is the LED.
It is formed so as to substantially coincide with the one side edge 16a of the chip 16. Here, let the radius of the semi-cylindrical shape of the lens 13 be R,
Assuming that the length of one side of the LED chip 16 is D and the critical angle is α, the radius R is determined according to the following formula R ≧ √2 · D / sin α, so that the light emitted from the LED chip 16 can be reflected by the lens 13 The total internal reflection on the inner surface of the can be reduced. For example, if the radius R is 2.
When set to 1 mm, D = 1.0 mm, α = 42.5
The effective light can be extracted with the extraction efficiency of about 80.0% in terms of calculation.

【００２５】このようにして、上記レンズ１３の中心軸
に一致する位置に、発光部の中心ではなく、一側縁が位
置するように、ＬＥＤチップ１６から成る発光部をシフ
トさせて配置することにより、屈折光が出射され、線状
光源１１の指向特性は、図３に示すように、ＬＥＤチッ
プ１６をシフトさせた側とは反対方向（図３にて左方）
に傾斜した指向特性を示すものとなる。尚、図３におい
て、法線方向を０度とし、左方をマイナス方向，右方を
プラス方向とする。そして、後述する第一反射面２１
は、この傾斜した指向特性の中心軸の光を反射するよう
に、照射方向即ち図面左方に配置する。ここで、線状光
源１１から出射する光の利用効率を高く、且つ上記線状
光源１１を使用する灯具１０全体を小型にするために
は、実用的には中心軸を２０乃至５０度の範囲で傾斜さ
せることが望ましい。In this way, the light emitting portion including the LED chip 16 is shifted and arranged so that one side edge is located at the position corresponding to the central axis of the lens 13 instead of the center of the light emitting portion. As a result, refracted light is emitted, and the directional characteristic of the linear light source 11 is, as shown in FIG. 3, in the direction opposite to the side on which the LED chip 16 is shifted (left in FIG. 3)
The directional characteristic is inclined to. In FIG. 3, the normal direction is 0 degrees, the left side is the minus direction, and the right side is the plus direction. Then, a first reflecting surface 21 described later
Are arranged in the irradiation direction, that is, on the left side of the drawing so as to reflect the light of the central axis of the inclined directional characteristic. Here, in order to improve the utilization efficiency of the light emitted from the linear light source 11 and reduce the size of the entire lamp 10 using the linear light source 11, the central axis is practically in the range of 20 to 50 degrees. It is desirable to tilt at.

【００２６】上記反射部材２０は、例えば線状光源１１
からの光を反射して、前方に向かって反射させるよう
に、前方に向かって凹状の第一の反射面２１と、第一の
反射面２１の両側に設けられた第二の反射面２２と、を
有している。The reflecting member 20 is, for example, a linear light source 11
A first reflecting surface 21 which is concave toward the front and second reflecting surfaces 22 provided on both sides of the first reflecting surface 21 so as to reflect the light from ,have.

【００２７】上記第一の反射面２１は、線状光源１１の
長手方向に対して垂直な断面にて、楕円反射面として形
成されている。ここで、楕円反射面は、楕円面や、楕円
面に近似可能な反射面を含むものである。以後の説明に
おいては、理解し易いように楕円面を基に説明するが、
断面形状が二次の有理Ｂｅｚｉｅｒ曲線（＝円錐曲線）
を用いているもの及びＮＵＲＢＳ（鳥谷浩志著；３次元
ＣＡＤの基礎と応用；共立出版（株）発行）のような自
由曲線により円錐曲線を近似した曲線のものであっても
よい。また、上記第一の反射面２１は、線状光源１１の
基台１２の面を０度としたとき、レンズ１３側に０乃至
１２０度の範囲内となるように、形成されている。尚、
図１において、第一の反射面２１は、何れの断面位置で
も同じ形状を有するように、所謂かまぼこ型に形成され
ているが、これに限らず、長手方向に関して曲率を有す
るように形成されていてもよい。The first reflecting surface 21 is formed as an elliptical reflecting surface in a cross section perpendicular to the longitudinal direction of the linear light source 11. Here, the elliptical reflecting surface includes an elliptic surface and a reflecting surface that can be approximated to an elliptic surface. In the following description, the ellipsoidal surface is used for easy understanding,
Rational Bezier curve (= conical curve) whose cross-sectional shape is quadratic
And a curve that approximates a conic curve by a free curve such as NURBS (written by Hiroshi Toriya; basic and application of three-dimensional CAD; published by Kyoritsu Shuppan Co., Ltd.). The first reflecting surface 21 is formed on the lens 13 side within a range of 0 to 120 degrees when the surface of the base 12 of the linear light source 11 is 0 degrees. still,
In FIG. 1, the first reflecting surface 21 is formed in a so-called semi-cylindrical shape so as to have the same shape at any cross-section position, but the present invention is not limited to this and is formed so as to have a curvature in the longitudinal direction. May be.

【００２８】そして、第一の反射面２１は、図４に示す
ように、その第一の焦点位置２１ａが上向きに配置され
た線状光源１１のレンズ１３の中心付近に位置するよう
に、また第二の焦点位置２１ｂが第一の焦点位置２１ａ
の例えば約２５ｍ前方のスクリーン上の約０．５度下方
に位置するように、配設されており、前照灯としての法
規を満足するようにしている。ここで、上記線状光源１
１は、図４に示すように、そのＬＥＤチップ１６の一側
縁１６ａが、第一の反射面２１の第一の焦点位置２１ａ
と一致し、且つＬＥＤモジュール１４全体が第一の焦点
位置２１ａより前方に位置するように、配置されてい
る。As shown in FIG. 4, the first reflecting surface 21 has its first focal position 21a located near the center of the lens 13 of the linear light source 11 arranged upward, and The second focus position 21b is the first focus position 21a
It is arranged so as to be located, for example, about 0.5 m below and about 0.5 degrees on the screen, so as to satisfy the regulation as a headlight. Here, the linear light source 1
As shown in FIG. 4, one side edge 16 a of the LED chip 16 has a first focus position 21 a of the first reflecting surface 21.
And the LED module 14 as a whole is located in front of the first focus position 21a.

【００２９】これにより、線状光源１１の各ＬＥＤチッ
プ１６の一側縁１６ａそして蛍光体層１７の一側縁１７
ａが、レンズ１３の中心に沿って且つ第一の反射面２１
の第一の焦点位置２１ａ付近に位置しており、各ＬＥＤ
チップ１６全体そして蛍光体層１７全体がこの第一の焦
点位置２１ａから前方に配置されていることから、各Ｌ
ＥＤチップ１６の一側縁１６ａそして蛍光体層１７の一
側縁から出射した光Ｌ１は、レンズ１３の長手方向に垂
直な断面においては屈折作用を受けずに、第一の反射面
２１により反射され、第二の焦点位置２１ｂに向かって
進み、この例では水平よりやや下向きに進むことにな
る。As a result, one side edge 16a of each LED chip 16 of the linear light source 11 and one side edge 17 of the phosphor layer 17 are formed.
a is along the center of the lens 13 and the first reflecting surface 21
Located near the first focus position 21a of each LED
Since the entire chip 16 and the entire phosphor layer 17 are arranged in front of the first focus position 21a, each L
The light L1 emitted from the one side edge 16a of the ED chip 16 and the one side edge of the phosphor layer 17 is reflected by the first reflecting surface 21 without being refracted in a cross section perpendicular to the longitudinal direction of the lens 13. Then, the light beam advances toward the second focus position 21b, and in this example, it moves slightly downward from the horizontal.

【００３０】また、各ＬＥＤチップ１６の全体は一側縁
１６ａよりも前方に位置するように配置されているの
で、各ＬＥＤチップ１６の他の側縁から出射した光Ｌ２
は、レンズ１３により屈折された後、第一の反射面２１
により反射され光Ｌ１よりも下方に向かって進むことに
なる。従って、ＬＥＤチップ１６そして蛍光体層１７か
ら出射して第一の反射面２１で反射された光は、前方に
向かって水平線より下側の、第二の焦点位置２１ｂより
も下方に向かって照射されると共に、ＬＥＤチップ１６
の一側縁１６ａそして蛍光体層１７の一側縁から出射し
た光Ｌ１はレンズ１３の長手方向に対して垂直な断面に
おける屈折作用を受けないので、第一の反射面２１で反
射され前方に向かって水平線以下に照射される光の水平
方向における照射領域と非照射領域との境界のコントラ
ストが良好となる。Further, since the entire LED chip 16 is arranged so as to be positioned in front of the one side edge 16a, the light L2 emitted from the other side edge of each LED chip 16 is arranged.
After being refracted by the lens 13, the first reflecting surface 21
The light is reflected by and travels downward from the light L1. Therefore, the light emitted from the LED chip 16 and the phosphor layer 17 and reflected by the first reflecting surface 21 is irradiated forward, below the horizontal line, and below the second focus position 21b. LED chip 16
The light L1 emitted from the one side edge 16a of the phosphor layer 17 and the one side edge of the phosphor layer 17 is not refracted in a cross section perpendicular to the longitudinal direction of the lens 13, and thus is reflected by the first reflecting surface 21 to the front side. The contrast of the boundary of the irradiation area and the non-irradiation area in the horizontal direction of the light irradiated below the horizontal line becomes good.

【００３１】これに対して、反射部材２０の第二の反射
面２２は、図５に示すように、長手方向及び光軸方向に
垂直な断面にて、複数の放物線となる複合放物反射面と
して形成されている。ここで、この放物反射面は、放物
面や、放物面に近似可能な反射面を含むものである。上
記放物反射面は、例えば第一の反射面２１の両側にて
（図５では一側のみが示されている）、線状光源１１の
反対側の端縁１１ａから出射して第一の反射面２１によ
り反射された最大拡散角θ（例えば４５度）の光を反射
させ、スクリーン上の所定配光を得るための目標点Ａに
向かって照射し得るように、目標点Ａを焦点位置とし、
目標点Ａから中心軸に対して角度θだけ傾斜した軸Ｂを
軸とし、さらに第一の反射面２１の一側の端部２１ａを
始点とする放物線Ｃから構成されている。On the other hand, the second reflecting surface 22 of the reflecting member 20, as shown in FIG. 5, is a compound parabolic reflecting surface which becomes a plurality of parabolas in a cross section perpendicular to the longitudinal direction and the optical axis direction. Is formed as. Here, this parabolic reflection surface includes a parabolic surface and a reflection surface that can be approximated to a parabolic surface. The parabolic reflection surface is, for example, on both sides of the first reflection surface 21 (only one side is shown in FIG. 5), is emitted from the opposite end edge 11 a of the linear light source 11, and is emitted from the first reflection surface 21. The target point A is focused so that the light having the maximum diffusion angle θ (for example, 45 degrees) reflected by the reflecting surface 21 can be reflected and irradiated toward the target point A for obtaining a predetermined light distribution on the screen. age,
It is composed of a parabola C whose axis is an axis B inclined from the target point A by an angle θ with respect to the central axis, and whose origin is an end 21a on one side of the first reflecting surface 21.

【００３２】そして、上記放物反射面の終点２２ａは、
線状光源１１の反対側の端縁から出射して第一の反射面
２１により反射された最大拡散角θの光が入射する位置
とする。このような目標点Ａを、複合放物反射面の各面
毎に設定することにより、所定の配光を得ることができ
る。The end point 22a of the parabolic reflection surface is
The position where the light with the maximum diffusion angle θ emitted from the opposite edge of the linear light source 11 and reflected by the first reflecting surface 21 is incident is set. A predetermined light distribution can be obtained by setting such a target point A for each surface of the compound parabolic reflection surface.

【００３３】本発明実施形態による車両用灯具１０は、
以上のように構成されており、線状光源１１の各ＬＥＤ
チップ１６が図示しない駆動回路により給電されて発光
することにより、線状光源１１の各ＬＥＤチップ１６か
ら出射した光は、反射部材２０の第一の反射面２１及び
第二の反射面２２で反射されることにより、前方に向か
って照射される。The vehicle lamp 10 according to the embodiment of the present invention is
Each LED of the linear light source 11 is configured as described above.
The light emitted from each LED chip 16 of the linear light source 11 is reflected by the first reflecting surface 21 and the second reflecting surface 22 of the reflecting member 20 by the chip 16 being supplied with power by a driving circuit (not shown) to emit light. As a result, the light is emitted forward.

【００３４】ここで、線状光源１１から出射した光は、
図６に示すように、反射部材の第一の反射面２１により
反射される際に、第一の反射面２１の形状に基づいて垂
直方向に関して制御されることにより、水平線Ｈより僅
かに下方に向かって照射されると共に、第二の反射面２
２により反射される際に、第二の反射面２２の各複合反
射面の目標点に基づいて水平方向に関して制御されるこ
とにより、最大拡散角θに制限される。これにより、図
７に示すような所謂すれ違いビームにおける下向き配光
に適した配光パターンが得られることになる。Here, the light emitted from the linear light source 11 is
As shown in FIG. 6, when the light is reflected by the first reflecting surface 21 of the reflecting member, it is controlled in the vertical direction based on the shape of the first reflecting surface 21, so that it is slightly below the horizontal line H. The second reflecting surface 2
When being reflected by 2, the maximum diffusion angle θ is limited by being controlled in the horizontal direction based on the target point of each composite reflecting surface of the second reflecting surface 22. As a result, a light distribution pattern suitable for downward light distribution in a so-called passing beam as shown in FIG. 7 can be obtained.

【００３５】また、灯具用線状光源１１については、そ
の線状発光部としての基台１２の各ＬＥＤチップ１６の
一側縁が、レンズ１３の中心に沿って位置している。こ
れにより、基台１２の発光領域である各ＬＥＤチップ１
６の一側縁１６ａから出射した光は、レンズ１３の中心
から半径方向外側に向かって出射することになるので、
レンズ１３による屈折作用を受けることなく、直進して
レンズ１３の外側に出射し、反射部材２０に入射する。
従って、反射部材２０により反射され前方に向かって照
射される配光パターンに関して、線状発光部である基台
１２の発光領域である各ＬＥＤチップ１６の境界線とし
ての一側縁１６ａにより形成される配光パターンの照射
領域と非照射領域との境界のコントラストが良好とな
る。これにより、従来のバルブを使用した灯具のような
カットオフのためのシャッタ部材を使用することなく、
すれ違いビーム用のカットオフを得ることができる。Further, in the linear light source 11 for a lamp, one side edge of each LED chip 16 of the base 12 as a linear light emitting portion is located along the center of the lens 13. As a result, each LED chip 1 that is the light emitting region of the base 12 is
Since the light emitted from the one side edge 16a of 6 is emitted outward from the center of the lens 13 in the radial direction,
Without going through the refraction effect of the lens 13, it goes straight on and goes out of the lens 13 to enter the reflecting member 20.
Therefore, regarding the light distribution pattern that is reflected by the reflecting member 20 and is irradiated forward, it is formed by the one side edge 16a as a boundary line of each LED chip 16 that is a light emitting region of the base 12 that is a linear light emitting portion. The contrast at the boundary between the irradiation area and the non-irradiation area of the light distribution pattern is improved. With this, without using a shutter member for a cutoff such as a conventional lighting device using a bulb,
A cutoff for the passing beam can be obtained.

【００３６】尚、上述した車両用灯具１０においては、
線状光源１１は、光軸Ｏ上にてＬＥＤチップ１６が基板
１５の上面に、即ち上向きに配置され、反射部材２０が
光軸Ｏの上側に配置されているが、これに限らず、図８
に示すように、線状光源１１が光軸Ｏ上にて下向きに配
置され、反射部材２０が光軸Ｏの下側に配置されるよう
にしてもよい。この場合、線状光源１１は、そのＬＥＤ
チップ１６の一側縁１６ａ及び蛍光体層１７の一側縁１
７ａが、第一の反射面２１の第一の焦点位置２１ａと一
致し、且つ全体が第一の焦点位置２１ａより後方に位置
するように、配置されている。これにより、図４に示し
た配置の場合と同様に、線状光源１１から出射した光
が、反射部材２０の第一の反射面２１により反射される
ことにより、光軸Ｏより僅かに下方に向かって照射され
ることになる。In the vehicle lamp 10 described above,
In the linear light source 11, the LED chip 16 is arranged on the upper surface of the substrate 15, that is, facing upward on the optical axis O, and the reflecting member 20 is arranged on the upper side of the optical axis O, but the invention is not limited to this. 8
As shown in, the linear light source 11 may be arranged downward on the optical axis O, and the reflecting member 20 may be arranged below the optical axis O. In this case, the linear light source 11 is the LED
One side edge 16a of the chip 16 and one side edge 1 of the phosphor layer 17
7a is arranged so as to coincide with the first focal position 21a of the first reflecting surface 21 and to be located entirely behind the first focal position 21a. As a result, as in the case of the arrangement shown in FIG. 4, the light emitted from the linear light source 11 is reflected by the first reflecting surface 21 of the reflecting member 20, so that the light is slightly below the optical axis O. It will be irradiated toward you.

【００３７】図９は、本発明による灯具用線状光源の第
二の実施形態の構成を示している。図９において、灯具
用線状光源３０は、線状発光部としてのＬＥＤアレイ３
１と、レンズ３２と、から構成されている。ＬＥＤアレ
イ３１は、基板３３上にて長手方向に並んで実装された
複数個のＬＥＤチップ３４から構成されている。尚、こ
の場合、蛍光体層及び中間部材は、図示が省略されてい
るが、実際には図２に示した線状光源１１における基台
１２と同様に設けられている。FIG. 9 shows the configuration of a second embodiment of the linear light source for a lamp according to the present invention. In FIG. 9, the linear light source 30 for a lamp is an LED array 3 as a linear light emitting unit.
1 and a lens 32. The LED array 31 is composed of a plurality of LED chips 34 mounted on the substrate 33 side by side in the longitudinal direction. In this case, although the phosphor layer and the intermediate member are not shown, they are actually provided in the same manner as the base 12 of the linear light source 11 shown in FIG.

【００３８】上記ＬＥＤチップ３４は、例えば一辺の長
さＤ（＝１．０ｍｍ）のチップサイズの青色ＬＥＤとし
て構成されており、各ＬＥＤチップ３４が基板３３の長
手方向の中心から距離Ｄ／２だけ側方にずれて例えば間
隔ｄ（＝３．６ｍｍ）で配置されることによって、その
長手方向の一側縁３４ａが、基板３３の長手方向の中心
に沿って配置されている。The LED chips 34 are configured as blue LEDs having a chip size of, for example, one side length D (= 1.0 mm), and each LED chip 34 is separated from the center of the substrate 33 in the longitudinal direction by a distance D / 2. The side edges 34a in the longitudinal direction are disposed along the center of the substrate 33 in the longitudinal direction by being displaced laterally by a distance of d (= 3.6 mm), for example.

【００３９】また、上記レンズ３２は、上記ＬＥＤアレ
イ３１の各ＬＥＤチップ３４をそれぞれ覆うように形成
されている。そして、上記レンズ３２は、半円球状の外
形を有しており、その中心が、上記各ＬＥＤチップ３４
の一側縁３４ａとほぼ一致するように形成されている。
ここで、レンズ３２の半円球状の半径をＲ，ＬＥＤチッ
プ３４の一辺の長さをＤ，臨界角をαとすると、以下の
式Ｒ≧√５・Ｄ／２ｓｉｎαに従って、半径Ｒを決定す
ることにより、ＬＥＤチップ３４から出射する光に関し
て、レンズ３２の内面における全反射を低減することが
できる。例えばＤ＝１．０ｍｍ，α＝４２．５度，半径
Ｒ＝２．１ｍｍに設定した場合、計算上、約９７．８％
の取出し効率で有効光を取り出すことができる。The lens 32 is formed so as to cover each LED chip 34 of the LED array 31. The lens 32 has a semi-spherical outer shape, and the center of the lens 32 is the LED chip 34.
It is formed so as to substantially coincide with the one side edge 34a.
Here, assuming that the radius of the hemispherical shape of the lens 32 is R, the length of one side of the LED chip 34 is D, and the critical angle is α, the radius R is determined according to the following formula R ≧ √5 · D / 2sinα. As a result, with respect to the light emitted from the LED chip 34, total reflection on the inner surface of the lens 32 can be reduced. For example, if D = 1.0 mm, α = 42.5 degrees, and radius R = 2.1 mm are set, then about 97.8% is calculated.
Effective light can be extracted with the extraction efficiency of.

【００４０】このような構成の灯具用線状光源３０によ
れば、前述した灯具用線状光源１１と同様にして、線状
光源３０から出射した光は、反射部材２０の第一の反射
面２１及び第二の反射面２２により反射され、前方に向
かって照射されることにより、図７に示すと同様の水平
線Ｈより僅かに下方の配光パターンを形成する。According to the linear light source 30 for a lamp having such a structure, the light emitted from the linear light source 30 is the same as the linear light source 11 for a lamp described above, and the first reflecting surface of the reflecting member 20. By being reflected by 21 and the second reflecting surface 22 and irradiated toward the front, a light distribution pattern slightly below the horizontal line H similar to that shown in FIG. 7 is formed.

【００４１】図１０は、本発明による灯具用線状光源の
第三の実施形態を示している。図１０において、灯具用
線状光源４０は、図９に示した灯具用線状光源３０とほ
ぼ同様の構成であるので、同じ構成部品には同じ符号を
付して、その説明を省略する。灯具用線状光源４０は、
図９の灯具用線状光源３０とは、ＬＥＤチップ３４の間
隔が例えばｄ（＝２．４ｍｍ）と短く、且つレンズ３２
が互いに重なりあった形状に形成されている点でのみ異
なる構成になっている。FIG. 10 shows a third embodiment of the linear light source for a lamp according to the present invention. In FIG. 10, the linear light source 40 for a lamp has substantially the same configuration as the linear light source 30 for a lamp shown in FIG. 9, and therefore, the same components are designated by the same reference numerals and the description thereof will be omitted. The linear light source 40 for a lamp is
The linear light source 30 for a lamp shown in FIG. 9 has a short distance between the LED chips 34, for example, d (= 2.4 mm), and a lens 32.
Are different from each other only in that they are formed so as to overlap each other.

【００４２】このような構成の灯具用線状光源４０によ
れば、図９に示した灯具用線状光源３０と同様の効果が
得られると共に、ＬＥＤチップ３４がより密に配置され
ていることにより、明るい光源が得られることになる。
尚、この場合、レンズ３２の半径Ｒを２．１ｍｍとした
とき、計算上、約９２．６ｍｍの取出し効率で有効光を
取り出すことができる。According to the linear light source 40 for a lamp having such a structure, the same effect as that of the linear light source 30 for a lamp shown in FIG. 9 can be obtained, and the LED chips 34 are arranged more densely. Thus, a bright light source can be obtained.
In this case, when the radius R of the lens 32 is 2.1 mm, the effective light can be extracted with the extraction efficiency of about 92.6 mm in calculation.

【００４３】上述した実施形態においては、自動車のす
れ違いビーム用の前照灯における水平拡散配光としての
車両用灯具１０に使用する灯具用線状光源１１，３０に
ついて説明したが、これらの実施形態による配光パター
ンに、さらに右または左斜め上方１５度の領域を照射す
る配光の照射光を重ねることにより、すれ違いビーム用
の前照灯の規格に適した配光の灯具を得ることができ
る。In the above-described embodiment, the linear light sources 11 and 30 for a lamp used in the vehicle lamp 10 as the horizontal diffused light distribution in the headlight for a low beam of an automobile have been described. A light distribution lamp suitable for the standard of the headlight for a low beam can be obtained by superimposing the irradiation light of the light distribution for illuminating an area of 15 degrees diagonally upward to the right or left on the light distribution pattern according to. .

【００４４】さらに、上述した実施形態においては、複
数のＬＥＤチップを並設したＬＥＤアレイとしての基台
を使用したが、長手方向に延びて形成したＥＬ（エレク
トロルミネセンス素子）等の面発光素子を光源として使
用してもよい。また、自動車のすれ違いビーム用の前照
灯としての車両用灯具１０に使用する灯具用線状光源１
１，３０について説明したが、これに限らず、本発明
は、自動車の走行ビーム用の前照灯、あるいは自動車用
補助灯（フォグランプ，ドライビングランプ，バックア
ップランプ等）や自動車用信号灯（テールランプ，ター
ンランプ，ストップランプ等）、あるいは自動車用以外
の例えば交通標識灯，交通信号灯，一般照明灯，作業
灯，一般表示灯，一般信号灯等の各種灯具に使用するた
めの灯具用線状光源に対して本発明を適用し得ることは
明らかである。Further, in the above-mentioned embodiments, the base as an LED array in which a plurality of LED chips are arranged is used, but a surface emitting element such as an EL (electroluminescence element) formed by extending in the longitudinal direction. May be used as the light source. Further, a linear light source 1 for a lamp used for a vehicle lamp 10 as a headlight for a low beam of an automobile.
1 and 30, the present invention is not limited to this, and the present invention is not limited to the headlights for the traveling beams of automobiles, auxiliary lights for automobiles (fog lamps, driving lamps, backup lamps, etc.) and signal lights for automobiles (tail lamps, turn lamps). Lamps, stop lamps, etc.), or linear light sources for lamps other than those for automobiles, such as traffic sign lights, traffic signal lights, general illumination lights, work lights, general indicator lights, general signal lights, etc. It is obvious that the present invention can be applied.

【００４５】[0045]

【発明の効果】以上述べたように、本発明によれば、線
状発光部、好ましくは直線状に配置された複数個の発光
素子、例えばＬＥＤアレイまたは線状に形成された面発
光素子から成る線状発光部の発光領域の一側縁から出射
した光は、レンズの中心から半径方向外側に向かって出
射することになるので、レンズ断面における屈折作用を
受けることなく、直進してレンズの外側に出射すること
になる。従って、反射部材により反射され前方に向かっ
て照射される際に、線状発光部の発光領域の境界線によ
り形成される光の配光パターンの照射領域と非照射領域
との境界のコントラストが良好となる。As described above, according to the present invention, a linear light emitting portion, preferably a plurality of linearly arranged light emitting elements such as an LED array or a linear light emitting element is used. The light emitted from one side edge of the light emitting region of the linear light emitting portion is emitted from the center of the lens toward the outer side in the radial direction. It will be emitted to the outside. Therefore, when the light is reflected by the reflecting member and irradiated forward, the contrast of the boundary between the irradiated area and the non-irradiated area of the light distribution pattern of the light formed by the boundary line of the light emitting area of the linear light emitting portion is good. Becomes

【００４６】このようにして、本発明によれば、簡単な
構成により、配光パターンの照射領域と非照射領域との
境界の良好なコントラストを実現できるようにした、灯
具特に車両用灯具に最適な線状光源が提供され得る。In this way, according to the present invention, it is possible to realize a good contrast of the boundary between the irradiation area and the non-irradiation area of the light distribution pattern with a simple structure, which is most suitable for a lamp, particularly a vehicle lamp. A linear light source may be provided.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明による灯具用線状光源の第一の実施形態
を組み込んだ車両用灯具を示す概略斜視図である。FIG. 1 is a schematic perspective view showing a vehicle lamp incorporating a first embodiment of a linear light source for a lamp according to the present invention.

【図２】図１の車両用灯具における線状光源の構成を示
す（Ａ）斜視図，（Ｂ）平面図及び（Ｃ）側面図であ
る。2A is a perspective view, FIG. 2B is a plan view, and FIG. 2C is a side view showing a configuration of a linear light source in the vehicle lamp of FIG.

【図３】図１の車両用灯具における線状光源の指向特性
を示すグラフである。3 is a graph showing the directional characteristics of a linear light source in the vehicle lamp of FIG.

【図４】図１の車両用灯具を示す概略側面図である。FIG. 4 is a schematic side view showing the vehicle lamp of FIG.

【図５】図１の車両用灯具を示す概略平面図である。5 is a schematic plan view showing the vehicle lamp of FIG. 1. FIG.

【図６】図１の車両用灯具の動作を示す概略斜視図であ
る。FIG. 6 is a schematic perspective view showing the operation of the vehicle lamp of FIG.

【図７】図１の車両用灯具による配光パターンを示す概
略図である。FIG. 7 is a schematic view showing a light distribution pattern by the vehicle lamp of FIG.

【図８】図１の車両用灯具の変形例を示す概略側面図で
ある。FIG. 8 is a schematic side view showing a modified example of the vehicle lamp of FIG.

【図９】本発明による灯具用線状光源の第二の実施形態
を示す（Ａ）概略斜視図，（Ｂ）断面図及び（Ｃ）部分
平面図である。9 (A) is a schematic perspective view, FIG. 9 (B) is a sectional view and FIG. 9 (C) is a partial plan view showing a second embodiment of the linear light source for a lamp according to the present invention.

【図１０】本発明による灯具用線状光源の第三の実施形
態を示す（Ａ）概略斜視図，（Ｂ）断面図及び（Ｃ）部
分平面図である。10 (A) is a schematic perspective view, FIG. 10 (B) is a sectional view, and FIG. 10 (C) is a partial plan view showing a third embodiment of the linear light source for a lamp according to the present invention.

【符号の説明】[Explanation of symbols]

１０ 車両用灯具 １１ 線状光源 １２ 基台 １３ レンズ １４ ＬＥＤアレイモジュール １５ 基板 １６ ＬＥＤチップ １６ａ 一側縁 １７ 蛍光体層（波長変換材料層） １７ａ 一側縁 １８ シリコンゲル ２０ 反射部材 ２１ 第一の反射面 ２２ 第二の反射面 ３０，４０ 灯具用線状光源 ３１ ＬＥＤアレイ ３２ レンズ ３３ 基板 ３４ ＬＥＤアレイ ３４ａ 一側縁 10 Vehicle lighting 11 Linear light source 12 bases 13 lenses 14 LED array module 15 substrates 16 LED chips 16a One side edge 17 Phosphor layer (wavelength conversion material layer) 17a One side edge 18 Silicon gel 20 Reflective member 21 First reflective surface 22 Second reflective surface 30,40 Linear light source for lighting equipment 31 LED array 32 lenses 33 substrate 34 LED array 34a One side edge

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２１Ｖ 13/12 Ｆ２１Ｍ 3/05 Ａ Ｈ０１Ｌ 33/00 3/08 Ａ // Ｆ２１Ｗ 101:02 3/12 Ｚ Ｆ２１Ｙ 101:02 Ｆ２１Ｑ 1/00 Ｂ 105:00 Ｎ (72)発明者 大和田 竜太郎 東京都目黒区中目黒２−９−13スタンレ− 電気株式会社内 (72)発明者 久志本 琢也 東京都目黒区中目黒２−９−13スタンレ− 電気株式会社内 Ｆターム(参考） 3K042 AA08 AB02 AB04 AC04 AC06 BB11 BC01 BE08 3K080 AA01 AB01 BA07 BA08 BB01 BB29 BC01 BC03 BC09 CC06 5F041 AA06 AA37 CB22 DA13 EE16 EE17 EE23 EE25 FF03 FF11─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F21V 13/12 F21M 3/05 A H01L 33/00 3/08 A // F21W 101: 02 3/12 Z F21Y 101: 02 F21Q 1/00 B 105: 00 N (72) Inventor Ryutaro Owada 2-9-13 Nakameguro, Meguro-ku, Tokyo Stanley Electric Co., Ltd. (72) Inventor Takuya Kushimoto Nakameguro, Meguro-ku, Tokyo 2-9-13 Stanley Electric Co., Ltd. F term (reference) 3K042 AA08 AB02 AB04 AC04 AC06 BB11 BC01 BE08 3K080 AA01 AB01 BA07 BA08 BB01 BB29 BC01 BC03 BC09 CC06 5F041 AA06 AA37 CB22 DA13 EE16 EE17 EE23 EE25 FF03FF

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 横方向に延びるように配設された線状光
源と、上記線状光源からの光を前方に向かって反射させ
るように、線状光源の後方に配設された反射部材と、か
ら成る灯具における線状光源であって、 基板上にて線状に構成された線状発光部と、その上に配
置された回転面から成るレンズと、を含んでおり、 上記線状発光部の長手方向に延びる発光領域の一側縁
が、上記レンズの中心に沿って配置されていることを特
徴とする、灯具用線状光源。1. A linear light source arranged so as to extend in a lateral direction, and a reflecting member arranged behind the linear light source so as to reflect light from the linear light source forward. A linear light source in a lamp comprising: a linear light emitting portion linearly formed on a substrate; and a lens formed of a rotating surface disposed on the linear light emitting portion. A linear light source for a lamp, wherein one side edge of a light emitting region extending in a longitudinal direction of the portion is arranged along the center of the lens. 【請求項２】 上記線状発光部が、直線状に配置された
複数個の発光素子から成ることを特徴とする、請求項１
に記載の灯具用線状光源。2. The linear light emitting unit comprises a plurality of linearly arranged light emitting elements.
The linear light source for a lamp according to. 【請求項３】 上記線状発光部が、ＬＥＤアレイである
ことを特徴とする、請求項２に記載の灯具用線状光源。3. The linear light source for a lamp according to claim 2, wherein the linear light emitting portion is an LED array. 【請求項４】 上記線状発光部が、線状に形成された面
発光素子であることを特徴とする、請求項１に記載の灯
具用線状光源。4. The linear light source for a lamp according to claim 1, wherein the linear light emitting portion is a linear light emitting device. 【請求項５】 上記線状発光部の発光面側に、線状発光
部を覆うように波長変換材料層が形成されており、 この波長変換材料層の長手方向に延びる一側縁が、発光
領域の一側縁として、上記レンズの中心に配置されてい
ることを特徴とする、請求項１から４の何れかに記載の
灯具用線状光源。5. A wavelength conversion material layer is formed on the light emitting surface side of the linear light emitting portion so as to cover the linear light emitting portion, and one side edge extending in the longitudinal direction of the wavelength conversion material layer emits light. The linear light source for a lamp according to any one of claims 1 to 4, wherein the linear light source is arranged at the center of the lens as one side edge of the region. 【請求項６】 上記レンズが、半円筒状に形成されてい
ることを特徴とする、請求項１から５の何れかに記載の
灯具用線状光源。6. The linear light source for a lamp according to claim 1, wherein the lens is formed in a semi-cylindrical shape. 【請求項７】 上記レンズが、樹脂材料により構成され
ていることを特徴とする、請求項１から６の何れかに記
載の灯具用線状光源。7. The linear light source for a lamp according to claim 1, wherein the lens is made of a resin material. 【請求項８】 横方向に延びるように配設された線状光
源と、上記線状光源からの光を前方に向かって反射させ
るように、線状光源の後方に配設された反射部材と、か
ら成る灯具における線状光源であって、 基板上にて直線状に配置された複数個の発光素子から成
る線状発光部と、その上に配置され且つ各発光素子の一
側縁を中心とする半円球状のレンズと、を含んでいるこ
とを特徴とする、灯具用線状光源。8. A linear light source arranged so as to extend in a lateral direction, and a reflecting member arranged behind the linear light source so as to reflect light from the linear light source forward. Which is a linear light source in a lamp, comprising: a linear light emitting part composed of a plurality of light emitting elements linearly arranged on a substrate; A linear light source for a lamp, comprising:
JP2001214778A 2001-07-16 2001-07-16 Linear light source for lamp Expired - Fee Related JP4665205B2 (en)

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