JP2011142006A - Light source device and lighting system - Google Patents

Light source device and lighting system Download PDF

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JP2011142006A
JP2011142006A JP2010001950A JP2010001950A JP2011142006A JP 2011142006 A JP2011142006 A JP 2011142006A JP 2010001950 A JP2010001950 A JP 2010001950A JP 2010001950 A JP2010001950 A JP 2010001950A JP 2011142006 A JP2011142006 A JP 2011142006A
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phosphor
light
light source
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phosphor region
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JP5530187B2 (en
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Shuichi Taya
周一 田谷
Morihisa Yoshino
森久 吉野
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Stanley Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To efficiently introduce fluorescence and excitation light from a phosphor region to an optical system, in a light source device exciting the phosphor region by the excitation light from a solid light source. <P>SOLUTION: The device includes a solid light source 5, and a phosphor part 12 into which excitation light from the solid light source 5 is incident. The phosphor part 12 includes: a phosphor region 2, excited by the excitation light from the solid light source 5, for emitting fluorescence of a wavelength longer than an emission wavelength of the solid light source 5; and a reflecting structure 6 fitted at a rear face of the phosphor region 2. The reflecting structure 6 has a reflecting face of a shape for reflecting fluorescence and excitation light generated in the phosphor region 2 so as to be condensed in points on the surface of the phosphor region 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、光源装置および照明装置に関する。   The present invention relates to a light source device and an illumination device.

ＬＥＤや半導体レーザー等の半導体発光素子を励起源として蛍光体を励起して光源とする光源装置および照明装置が実用化されており、例えば特許文献１には、レーザー光を用いて蛍光体を励起し高輝度の光源とする光源装置および照明装置が提案されている。   Light source devices and illumination devices that use phosphors as light sources by using semiconductor light emitting elements such as LEDs and semiconductor lasers as excitation light sources have been put into practical use. For example, in Patent Document 1, phosphors are excited using laser light. However, a light source device and an illuminating device that use a high-intensity light source have been proposed.

特開２００５−１９１４８３号公報JP-A-2005-191483

しかしながら、従来の方式では、半導体発光素子で蛍光体を励起する光源装置および照明装置において、蛍光体が板状であるため光が拡散し、効率的に光学系へ導入して利用することができないという問題があった。   However, in the conventional method, in the light source device and the illumination device that excites the phosphor with the semiconductor light emitting element, the phosphor is plate-like, so that the light diffuses and cannot be efficiently introduced into the optical system. There was a problem.

本発明は、半導体発光素子などの固体光源からの励起光により蛍光体領域を励起する光源装置および照明装置において、蛍光体領域からの蛍光および励起光を効率的に光学系へ導入して利用することの可能な光源装置および照明装置を提供することを目的としている。   INDUSTRIAL APPLICABILITY The present invention efficiently uses fluorescence and excitation light from a phosphor region in an optical system in a light source device and an illumination device that excite the phosphor region with excitation light from a solid light source such as a semiconductor light emitting element. It is an object of the present invention to provide a light source device and a lighting device that can be used.

上記目的を達成するために、請求項１記載の発明は、紫外光から可視光までの波長領域のうちの所定の波長の光を発光する固体光源と、該固体光源からの励起光により励起され該固体光源の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域と、該蛍光体領域内で発生した蛍光と励起光を前記蛍光体領域の表面に点状に集光させるように反射する形状の反射面を前記蛍光体領域の背面に有していることを特徴とする光源装置である。   In order to achieve the above object, the invention described in claim 1 is excited by a solid light source that emits light of a predetermined wavelength in a wavelength region from ultraviolet light to visible light, and excitation light from the solid light source. A phosphor region composed of at least one type of phosphor that emits fluorescence having a wavelength longer than the emission wavelength of the solid-state light source, and the fluorescence and excitation light generated in the phosphor region on the surface of the phosphor region The light source device is characterized in that a reflective surface having a shape that reflects light so as to be condensed is provided on the back surface of the phosphor region.

また、請求項２記載の発明は、請求項１記載の光源装置において、前記蛍光体領域の表面に光取り出し構造を有することを特徴としている。   According to a second aspect of the present invention, in the light source device according to the first aspect, a light extraction structure is provided on a surface of the phosphor region.

また、請求項３記載の発明は、請求項１または請求項２記載の光源装置において、前記蛍光体領域の表面に遮光板を有することを特徴としている。   According to a third aspect of the present invention, in the light source device according to the first or second aspect, a light shielding plate is provided on the surface of the phosphor region.

また、請求項４記載の発明は、請求項１乃至請求項３のいずれか一項に記載の光源装置が用いられていることを特徴とする照明装置である。   According to a fourth aspect of the present invention, there is provided an illuminating device in which the light source device according to any one of the first to third aspects is used.

また、請求項５記載の発明は、請求項１乃至請求項３のいずれか一項に記載の光源装置が用いられていることを特徴とする自動車用前照灯である。   The invention according to claim 5 is an automotive headlamp characterized by using the light source device according to any one of claims 1 to 3.

請求項１乃至請求項５記載の発明によれば、紫外光から可視光までの波長領域のうちの所定の波長の光を発光する固体光源と、該固体光源からの励起光により励起され該固体光源の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域と、該蛍光体領域内で発生した蛍光と励起光を前記蛍光体領域の表面に点状に集光させるように反射する形状の反射面を前記蛍光体領域の背面に有しているので、蛍光体領域からの蛍光および励起光を蛍光体領域の表面に向けて点状に集光させて、効率的に光学系へ導入して利用することができる。   According to the first to fifth aspects of the present invention, the solid light source that emits light having a predetermined wavelength in the wavelength region from ultraviolet light to visible light, and the solid that is excited by the excitation light from the solid light source. A phosphor region composed of at least one type of phosphor that emits fluorescence having a wavelength longer than the emission wavelength of the light source, and the fluorescence and excitation light generated in the phosphor region are collected in the form of dots on the surface of the phosphor region. Since it has a reflecting surface in the shape of reflecting so as to be light on the back surface of the phosphor region, the fluorescence and excitation light from the phosphor region is condensed in a dot shape toward the surface of the phosphor region, It can be efficiently introduced into an optical system and used.

本発明の光源装置および照明装置の構成例を示す図である。It is a figure which shows the structural example of the light source device of this invention, and an illuminating device. 蛍光体部の構成例を示す図である。It is a figure which shows the structural example of a fluorescent substance part. 蛍光体領域（蛍光体層）の表面に光取り出し構造を設けた蛍光体部の例を示す図である。It is a figure which shows the example of the fluorescent substance part which provided the light extraction structure in the surface of the fluorescent substance area | region (phosphor layer). 蛍光体領域（蛍光体層）の表面に遮光板を設けた例を示す図である。It is a figure which shows the example which provided the light-shielding plate in the surface of the fluorescent substance area | region (phosphor layer). 遮光板によって遮光する部分の蛍光体領域（蛍光体層）を削りその背面に反射構造体を設けた例を示す図である。It is a figure which shows the example which shaved the fluorescent substance area | region (phosphor layer) of the part shielded with a light-shielding plate, and provided the reflective structure in the back surface. 遮光部分の前面に反射構造体を設けた例を示す図である。It is a figure which shows the example which provided the reflective structure in the front surface of the light-shielding part. 本発明の照明装置の具体例を示す図である。It is a figure which shows the specific example of the illuminating device of this invention. 本発明の光源装置を複数個、方向指示器やポジションランプと組み合わせた照明装置（自動車用前照灯モジュール）の例を示す図である。It is a figure which shows the example of the illuminating device (automobile headlamp module) which combined several light source devices of this invention with the direction indicator and the position lamp. 本発明の光源装置および照明装置の他の構成例を示す図である。It is a figure which shows the other structural example of the light source device of this invention, and an illuminating device.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

本発明の光源装置は、紫外光から可視光までの波長領域のうちの所定の波長の光を発光する固体光源と、該固体光源からの励起光により励起され該固体光源の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域と、該蛍光体領域内で発生した蛍光と励起光を前記蛍光体領域の表面に点状に集光させるように反射する形状の反射面を前記蛍光体領域の背面に有していることを特徴としている。なお、蛍光体領域とは、蛍光体層を有する領域であって、蛍光体層に対応させて、光の透過率や反射率を調整する調整層などが設けられる場合には、蛍光体層とともに、これらをも含めたものを指すものとする。以下では、便宜上、蛍光体層とこれに対応する蛍光体領域には、同じ符号を付している。   The light source device of the present invention includes a solid-state light source that emits light having a predetermined wavelength in a wavelength region from ultraviolet light to visible light, and an excitation wavelength from the solid-state light source that is longer than the emission wavelength of the solid-state light source. A phosphor region composed of at least one type of phosphor that emits fluorescence of a wavelength, and a shape that reflects the fluorescence and excitation light generated in the phosphor region so as to be condensed in the form of dots on the surface of the phosphor region The reflective surface is provided on the back surface of the phosphor region. The phosphor region is a region having a phosphor layer. When an adjustment layer or the like for adjusting the light transmittance or reflectance is provided corresponding to the phosphor layer, the phosphor region is combined with the phosphor layer. , Including these. In the following, for the sake of convenience, the same reference numerals are assigned to the phosphor layers and the corresponding phosphor regions.

図１は、本発明の光源装置および照明装置の構成例を示す図である。図１の構成例では、光源装置は、紫外光から可視光（例えば、青色光）までの波長領域のうちの所定の波長の光を発光する固体光源５と、固体光源５からの励起光が入射する蛍光体部１２とを備えている。   FIG. 1 is a diagram illustrating a configuration example of a light source device and a lighting device according to the present invention. In the configuration example of FIG. 1, the light source device includes a solid light source 5 that emits light of a predetermined wavelength in a wavelength region from ultraviolet light to visible light (for example, blue light), and excitation light from the solid light source 5. And an incident phosphor portion 12.

図２は、蛍光体部１２の構成例を示す図である。図２を参照すると、蛍光体部１２は、固体光源５からの励起光により励起され該固体光源５の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域２と、蛍光体領域２の背面（励起光が入射する側の面とは反対の面側）に設けられた反射構造体６とを有し、反射構造体６は、蛍光体領域２内で発生した蛍光と励起光を蛍光体領域２の表面２ａに点状に集光させるように反射する形状（図２の例では、所定の半径の曲率を有する凹曲面の形状）の反射面６ａを蛍光体領域２の背面に有している。   FIG. 2 is a diagram illustrating a configuration example of the phosphor portion 12. Referring to FIG. 2, the phosphor part 12 is a phosphor region 2 composed of at least one kind of phosphor that is excited by excitation light from the solid light source 5 and emits fluorescence having a longer wavelength than the emission wavelength of the solid light source 5. And a reflecting structure 6 provided on the back surface of the phosphor region 2 (the surface opposite to the surface on which excitation light is incident). The reflecting structure 6 is generated in the phosphor region 2. The reflecting surface 6a having a shape that reflects the fluorescent light and the excitation light so as to be condensed in a spot shape on the surface 2a of the phosphor region 2 (in the example of FIG. 2, a concave curved surface shape having a curvature of a predetermined radius) is fluorescent. It is on the back of the body region 2.

すなわち、図１、図２の構成例では、蛍光体領域２の面のうち固体光源５からの励起光が入射する側の面２ａとは反対側に設けられた反射面６ａによる反射を用いて蛍光と励起光の光を取り出す方式（以下、反射方式と称す）が採用されている。   That is, in the configuration example of FIGS. 1 and 2, the reflection by the reflecting surface 6a provided on the opposite side to the surface 2a on the side where the excitation light from the solid light source 5 is incident on the surface of the phosphor region 2 is used. A method of taking out fluorescence and excitation light (hereinafter referred to as a reflection method) is employed.

ここで、蛍光体領域（蛍光体層）２には、樹脂成分を実質的に含まないもの（具体的には、蛍光体層の形成に通常使用される樹脂成分が蛍光体層の５ｗｔ％以下であるもの）が用いられるのが良く、このような蛍光体領域（蛍光体層）２を実現するものとして、蛍光体粉末をシリコーン樹脂やガラス中に分散させたもの、ガラス母体に発光中心イオンを添加したガラス蛍光体、樹脂などの結合部材を含まない蛍光体の単結晶や蛍光体の多結晶体（以下、蛍光体セラミックスと称す）などを用いることができる。蛍光体セラミックスは、蛍光体の製造過程において、焼成前に材料を任意の形状に成形し、焼成した蛍光体の塊である。蛍光体セラミックスは、その製造工程のうち、成形工程においてバインダーとして有機物を使用する場合があるが、成形後に脱脂工程を設けて有機成分を焼き飛ばすため、焼成後の蛍光体セラミックスには有機樹脂成分は５ｗｔ％以下しか残留しない。したがって、ここに挙げた蛍光体層は、実質的に樹脂成分を含まず、無機物質のみから構成されているため、熱による変色が発生することがなく、高輝度化を図ることが可能である。また、無機物質のみからなるガラスやセラミックスは、一般に、樹脂よりも熱伝導率が高いため、蛍光体領域（蛍光体層）２から反射構造体６への熱放散においても有利である。   Here, the phosphor region (phosphor layer) 2 does not substantially contain a resin component (specifically, the resin component normally used for forming the phosphor layer is 5 wt% or less of the phosphor layer). In order to realize such a phosphor region (phosphor layer) 2, phosphor powder dispersed in silicone resin or glass, or a luminescent center ion on the glass matrix It is possible to use a glass phosphor added with a phosphor, a phosphor single crystal not containing a binding member such as a resin, a phosphor polycrystalline (hereinafter referred to as phosphor ceramic), and the like. The phosphor ceramic is a lump of phosphor that is formed by firing a material into an arbitrary shape before firing in the phosphor manufacturing process. Phosphor ceramics may use an organic substance as a binder in the molding process during the manufacturing process. However, an organic resin component is included in the fired phosphor ceramic because a degreasing process is provided after molding to burn off the organic components. Remains only 5 wt% or less. Therefore, since the phosphor layer mentioned here does not contain a resin component substantially and is composed only of an inorganic substance, discoloration due to heat does not occur and high brightness can be achieved. . In addition, glass or ceramics made of only an inorganic substance generally has a higher thermal conductivity than a resin, and is therefore advantageous in heat dissipation from the phosphor region (phosphor layer) 2 to the reflecting structure 6.

また、蛍光体領域（蛍光体層）２は、固体光源５からの励起光により励起され固体光源５の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体を含んでいる。具体的には、固体光源５が紫外光を発光するものである場合、蛍光体領域（蛍光体層）２は、例えば、青、緑、赤色などの蛍光体のうち、少なくとも１種類の蛍光体を含んでいる。固体光源５が紫外光を発光するものである場合、蛍光体領域（蛍光体層）２が、例えば、青、緑、赤色の蛍光体を含んでいるときには（青、緑、赤色の蛍光体のそれぞれが例えば均一に分散されて混合されたものとなっているときには）、固体光源５からの紫外光を蛍光体領域（蛍光体層）２に照射するとき、反射光として白色の照明光を得ることができる。また、固体光源５が例えば青色光を発光するものである場合、蛍光体領域（蛍光体層）２は、例えば、緑、赤、黄色などの蛍光体のうち、少なくとも１種類の蛍光体を含んでいる。固体光源５が例えば青色光を発光するものである場合、蛍光体領域（蛍光体層）２が、例えば、緑、赤色の蛍光体を含んでいるときには（緑、赤色の蛍光体のそれぞれが例えば均一に分散されて混合されたものとなっているときには）、固体光源５からの青色光を蛍光体領域（蛍光体層）２に照射するとき、反射光として白色などの照明光を得ることができる。また、固体光源５が例えば青色光を発光するものである場合、蛍光体領域（蛍光体層）２が、例えば、黄色の蛍光体だけを含んでいるときには、固体光源５からの青色光を蛍光体領域（蛍光体層）２に照射するとき、反射光として白色などの照明光を得ることができる。   The phosphor region (phosphor layer) 2 includes at least one kind of phosphor that is excited by excitation light from the solid light source 5 and emits fluorescence having a longer wavelength than the emission wavelength of the solid light source 5. Specifically, when the solid-state light source 5 emits ultraviolet light, the phosphor region (phosphor layer) 2 is, for example, at least one phosphor among phosphors such as blue, green, and red. Is included. When the solid light source 5 emits ultraviolet light, when the phosphor region (phosphor layer) 2 includes, for example, blue, green, and red phosphors (blue, green, and red phosphors). For example, when each is uniformly dispersed and mixed), when the phosphor region (phosphor layer) 2 is irradiated with ultraviolet light from the solid light source 5, white illumination light is obtained as reflected light. be able to. When the solid light source 5 emits blue light, for example, the phosphor region (phosphor layer) 2 includes at least one kind of phosphor among phosphors such as green, red, and yellow. It is out. When the solid light source 5 emits blue light, for example, the phosphor region (phosphor layer) 2 includes, for example, green and red phosphors (each of the green and red phosphors is, for example, When the light is uniformly dispersed and mixed), when illuminating the phosphor region (phosphor layer) 2 with blue light from the solid light source 5, illumination light such as white can be obtained as reflected light. it can. In addition, when the solid light source 5 emits blue light, for example, when the phosphor region (phosphor layer) 2 includes only a yellow phosphor, for example, the blue light from the solid light source 5 is fluorescent. When the body region (phosphor layer) 2 is irradiated, illumination light such as white can be obtained as reflected light.

また、反射構造体６は、光（固体光源５からの励起光によって励起された蛍光体領域（蛍光体層）２からの発光（蛍光）と、蛍光体領域（蛍光体層）２で吸収されなかった固体光源５からの光）に対する反射面６ａの役割と、蛍光体領域（蛍光体層）２から放散してきた熱を外部へ放散させる役割を担うものである。このため、高い光反射特性、伝熱特性、加工性が求められる。この反射構造体６には、金属基板やアルミナなどの酸化物セラミックス、窒化アルミニウムなどの非酸化セラミックスなどが使用可能であるが、特に高い光反射特性、伝熱特性、加工性を併せ持つ金属基板が使用されるのが望ましい。   The reflection structure 6 is absorbed by light (luminescence (fluorescence) from the phosphor region (phosphor layer) 2 excited by excitation light from the solid light source 5) and the phosphor region (phosphor layer) 2. It plays a role of the reflecting surface 6a with respect to the light from the solid light source 5 that has not existed and a role of dissipating the heat dissipated from the phosphor region (phosphor layer) 2 to the outside. For this reason, high light reflection characteristics, heat transfer characteristics, and workability are required. The reflective structure 6 can be a metal substrate, oxide ceramics such as alumina, non-oxide ceramics such as aluminum nitride, etc., but a metal substrate having particularly high light reflection characteristics, heat transfer characteristics, and workability is used. It is desirable to be used.

次に、図１の光源装置をより詳細に説明する。   Next, the light source device of FIG. 1 will be described in more detail.

図１の光源装置において、固体光源５には、紫外光から可視光（例えば青色光）領域に発光波長をもつ発光ダイオードや半導体レーザーなどが使用可能である。   In the light source device of FIG. 1, the solid-state light source 5 can be a light-emitting diode or a semiconductor laser having a light emission wavelength from ultraviolet light to visible light (for example, blue light).

より具体的に、固体光源５には、例えば、ＩｎＧａＮ系の材料を用いた発光波長が約３８０ｎｍの近紫外光を発光する発光ダイオードや半導体レーザーなどを用いることができる。この場合、蛍光体領域（蛍光体層）２の蛍光体としては、波長が約３８０ｎｍないし約４００ｎｍの紫外光により励起されるものとして、例えば、赤色蛍光体には、ＣａＡｌＳｉＮ３：Ｅｕ２＋、Ｃａ２Ｓｉ５Ｎ８：Ｅｕ２＋、Ｌａ２Ｏ２Ｓ：Ｅｕ３＋、ＫＳｉＦ６：Ｍｎ４＋、 ＫＴｉＦ６：Ｍｎ４＋等を用いることができ、緑色蛍光体には、（Ｓｉ，Ａｌ）６（Ｏ，Ｎ）８：Ｅｕ２＋、ＢａＭｇＡｌ１０Ｏ１７：Ｅｕ２＋，Ｍｎ２＋、（Ｂａ，Ｓｒ）２ＳｉＯ４：Ｅｕ２＋等を用いることができ、青色蛍光体には、（Ｓｒ，Ｃａ，Ｂａ，Ｍｇ）１０（ＰＯ４）６Ｃｌ２：Ｅｕ２＋、ＢａＭｇＡｌ１０Ｏ１７：Ｅｕ２＋、ＬａＡｌ（Ｓｉ，Ａｌ）６（Ｎ，Ｏ）１０：Ｃｅ３＋等を用いることができる。 More specifically, the solid-state light source 5 may be, for example, a light emitting diode or semiconductor laser that emits near-ultraviolet light having an emission wavelength of about 380 nm using an InGaN-based material. In this case, the phosphor in the phosphor region (phosphor layer) 2 is excited by ultraviolet light having a wavelength of about 380 nm to about 400 nm. For example, a red phosphor has CaAlSiN 3 : Eu 2+ , Ca 2 Si 5 N 8 : Eu 2+ , La 2 O 2 S: Eu 3+ , KSiF 6 : Mn 4+ , KTiF 6 : Mn 4+, etc. can be used, and (Si, Al) 6 (O , N) 8 : Eu 2+ , BaMgAl 10 O 17 : Eu 2+ , Mn 2+ , (Ba, Sr) 2 SiO 4 : Eu 2+, etc., and (Sr, Ca, Ba, mg) 10 (PO 4) 6 C l2: Eu 2+, BaMgAl 10 O 17: Eu 2+, LaAl (Si, Al) 6 (N, O) 10: be used Ce 3+, etc. Kill.

また、固体光源５には、例えば、ＧａＮ系の材料を用いた発光波長が約４６０ｎｍの青色光を発光する発光ダイオードや半導体レーザーなどを用いることができる。この場合、蛍光体層２の蛍光体としては、波長が約４４０ｎｍないし約４７０ｎｍの青色光により励起されるものとして、例えば、赤色蛍光体には、ＣａＡｌＳｉＮ３：Ｅｕ２＋、Ｃａ２Ｓｉ５Ｎ８：Ｅｕ２＋、ＫＳｉＦ６：Ｍｎ４＋、ＫＴｉＦ６：Ｍｎ４＋等を用いることができ、緑色蛍光体には、Ｙ３（Ｇａ，Ａｌ）５Ｏ１２：Ｃｅ３＋、Ｃａ３Ｓｃ２Ｓｉ３Ｏ１２：Ｃｅ３＋、ＣａＳｃ２Ｏ４：Ｅｕ２＋、（Ｂａ，Ｓｒ）２ＳｉＯ４：Ｅｕ２＋、Ｂａ３Ｓｉ６Ｏ１２Ｎ２：Ｅｕ２＋、（Ｓｉ，Ａｌ）６（Ｏ，Ｎ）８：Ｅｕ２＋等を用いることができる。また、波長が約４４０ｎｍないし約４７０ｎｍの青色光により励起されるものとして、例えば、Ｙ３Ａｌ５Ｏ１２：Ｃｅ３＋ （ＹＡＧ）、（Ｓｒ，Ｂａ）２ＳｉＯ４：Ｅｕ２＋、Ｃａｘ（Ｓｉ，Ａｌ）１２（Ｏ，Ｎ）１６：Ｅｕ２＋等の黄色蛍光体を用いることができる。 The solid light source 5 may be, for example, a light emitting diode or a semiconductor laser that emits blue light having a light emission wavelength of about 460 nm using a GaN-based material. In this case, the phosphor of the phosphor layer 2 is excited by blue light having a wavelength of about 440 nm to about 470 nm. For example, the red phosphor has CaAlSiN 3 : Eu 2+ , Ca 2 Si 5 N 8. : Eu 2+ , KSiF 6 : Mn 4+ , KTiF 6 : Mn 4+ can be used, and Y 3 (Ga, Al) 5 O 12 : Ce 3+ , Ca 3 Sc 2 Si 3 O 12 can be used as a green phosphor. : Ce 3+ , CaSc 2 O 4 : Eu 2+ , (Ba, Sr) 2 SiO 4 : Eu 2+ , Ba 3 Si 6 O 12 N 2 : Eu 2+ , (Si, Al) 6 (O, N) 8 : Eu 2+ or the like can be used. Moreover, as what is excited by blue light with a wavelength of about 440 nm to about 470 nm, for example, Y 3 Al 5 O 12 : Ce 3+ (YAG), (Sr, Ba) 2 SiO 4 : Eu 2+ , Ca x (Si , Al) 12 (O, N) 16 : Eu 2+ or the like can be used.

蛍光体領域（蛍光体層）２としては、これらの蛍光体粉末をシリコーン樹脂やガラス中に分散させたもの、ガラス母体に発光中心イオンを添加したガラス蛍光体、樹脂などの結合部材を含まない蛍光体セラミックス等を用いることができる。蛍光体粉末をガラス中に分散させたものの具体例としては、上に列挙した組成の蛍光体粉末をＰ２Ｏ３、ＳｉＯ２、Ｂ２Ｏ３、Ａｌ２Ｏ３などの成分を含むガラス中に分散したものが挙げられる。ガラス母体に発光中心イオンを添加したガラス蛍光体としては、Ｃｅ３＋やＥｕ２＋を付活剤として添加したＣａ−Ｓｉ−Ａｌ−Ｏ−Ｎ系やＹ−Ｓｉ−Ａｌ−Ｏ−Ｎ系などの酸窒化物系ガラス蛍光体が挙げられる。蛍光体セラミックスとしては、上に列挙した組成の蛍光体組成からなり、樹脂成分を実質的に含まない焼結体が挙げられる。これらの中でも透光性を有する蛍光体セラミックスを使用することが望ましい。これは、焼結体中に光の散乱の原因となるポアや粒界の不純物がほとんど存在しないために透光性を有するに至った蛍光体セラミックスである。ポアや不純物は熱拡散を妨げる原因にもなるため、透光性セラミックスは高い熱伝導率を示す。このため蛍光体領域（蛍光体層）として利用した場合には励起光や蛍光を拡散により失うことなく蛍光体領域（蛍光体層）から取り出して利用でき、さらに蛍光体領域（蛍光体層）で発生した熱を効率良く放散することができる。透光性を示さない焼結体でも出来るだけポアや不純物の少ないものが望ましい。ポアの残存量を評価する指標としては蛍光体セラミックスの比重の値を用いることができ、その値が計算される理論値に対して９５％以上のものが望ましい。 The phosphor region (phosphor layer) 2 does not include binding members such as those obtained by dispersing these phosphor powders in a silicone resin or glass, a glass phosphor obtained by adding a luminescent center ion to a glass matrix, or a resin. Phosphor ceramics or the like can be used. As a specific example of the phosphor powder dispersed in glass, the phosphor powder having the composition listed above is contained in a glass containing components such as P 2 O 3 , SiO 2 , B 2 O 3 , and Al 2 O 3. Are dispersed. Examples of glass phosphors in which a luminescent center ion is added to a glass matrix include Ca—Si—Al—O—N and Y—Si—Al—O—N systems in which Ce 3+ or Eu 2+ is added as an activator. Examples thereof include oxynitride glass phosphors. Examples of the phosphor ceramic include a sintered body having a phosphor composition having the composition listed above and substantially not including a resin component. Among these, it is desirable to use a phosphor ceramic having translucency. This is a phosphor ceramic that has translucency because there are almost no pores or impurities at grain boundaries that cause light scattering in the sintered body. Since pores and impurities can also prevent thermal diffusion, translucent ceramics exhibit high thermal conductivity. For this reason, when used as a phosphor region (phosphor layer), excitation light and fluorescence can be taken out from the phosphor region (phosphor layer) without being lost by diffusion, and further used in the phosphor region (phosphor layer). The generated heat can be dissipated efficiently. Even a sintered body that does not show translucency is desirable to have as few pores and impurities as possible. As an index for evaluating the remaining amount of pores, the value of specific gravity of the phosphor ceramic can be used, and it is desirable that the value is 95% or more with respect to the theoretical value by which the value is calculated.

ここで、青色励起の黄色発光蛍光体であるＹ３Ａｌ５Ｏ１２：Ｃｅ３＋蛍光体を例に、透光性を有する蛍光体セラミックスの製造方法を説明する。蛍光体セラミックスは出発原料の混合工程、成形工程、焼成工程、加工工程を経て製造される。出発原料には、酸化イットリウムや酸化セリウムやアルミナ等、Ｙ３Ａｌ５Ｏ１２：Ｃｅ３＋蛍光体の構成元素の酸化物や、焼成後に酸化物となる炭酸塩、硝酸塩、硫酸塩等を用いる。出発原料の粒径はサブミクロンサイズのものが望ましい。これらの原料を化学量論比となるように秤量する。このとき焼成後のセラミックスの透過率向上を目的として、カルシウムやシリコンなどの化合物を添加することも可能である。秤量した原料は、水もしくは有機溶剤を用い、湿式ボールミルにより十分に分散、混合を行う。次に混合物を所定の形状に成形する。成形方法としては、一軸加圧法、冷間静水圧法、スリップキャスティング法や射出成形法等を用いることができる。得られた成形体を１６００〜１８００℃で焼成する。これにより、透光性のＹ３Ａｌ５Ｏ１２：Ｃｅ３＋蛍光体セラミックスを得ることができる。 Here, a method for producing a phosphor ceramic having translucency will be described by taking as an example a Y 3 Al 5 O 12 : Ce 3+ phosphor that is a yellow-excited phosphor emitting blue light. The phosphor ceramic is manufactured through a starting material mixing step, a forming step, a firing step, and a processing step. As starting materials, yttrium oxide, cerium oxide, alumina, and the like, oxides of constituent elements of Y 3 Al 5 O 12 : Ce 3+ phosphor, carbonates, nitrates, sulfates and the like that become oxides after firing are used. The particle size of the starting material is preferably a submicron size. These raw materials are weighed so as to have a stoichiometric ratio. At this time, for the purpose of improving the transmittance of the ceramic after firing, it is also possible to add a compound such as calcium or silicon. The weighed raw materials are sufficiently dispersed and mixed by a wet ball mill using water or an organic solvent. Next, the mixture is formed into a predetermined shape. As the molding method, a uniaxial pressing method, a cold isostatic pressing method, a slip casting method, an injection molding method, or the like can be used. The obtained molded body is fired at 1600 to 1800 ° C. Thus, translucent Y 3 Al 5 O 12: Ce 3+ phosphor ceramic can be obtained.

以上のようにして作製した蛍光体セラミックスは、自動研磨装置などを用いて凸状に整形する。さらに背面に凹曲面状の反射面６ａをもつ反射構造体６を設けることで、励起された蛍光や透過光（励起光）を一点に集光させることが出来る。   The phosphor ceramic produced as described above is shaped into a convex shape using an automatic polishing apparatus or the like. Further, by providing the reflecting structure 6 having the concave curved reflecting surface 6a on the back surface, the excited fluorescence or transmitted light (excitation light) can be condensed at one point.

ここで、蛍光体セラミックスは、屈折率が約１．８と空気に対して屈折率が高く、さらに、内部にポアなどの散乱の原因となるものが少ないため、光が蛍光体領域（蛍光体層）２の内部に閉じ込められて、取り出せる光が減少してしまう。この問題を解決するために、蛍光体セラミックスの表面にエッチングにより凹凸の光取出し構造を設けたり、蛍光体セラミックスと空気の間の屈折率材料層を設けることで、光取出しを改善できる。   Here, the phosphor ceramic has a refractive index of about 1.8, which is high with respect to air, and further, there are few things that cause scattering such as pores inside. The light that can be extracted is confined within the layer 2). In order to solve this problem, light extraction can be improved by providing an uneven light extraction structure by etching on the surface of the phosphor ceramic, or by providing a refractive index material layer between the phosphor ceramic and air.

図３には、蛍光体領域（蛍光体層）２の表面２ａに光取り出し構造１３を設けた蛍光体部１２の例が示されている。上述したように、蛍光体セラミックス（例えばＹＡＧ）の屈折率は約１．８であり空気の屈折率に対して大きいため、蛍光体領域（蛍光体層）２の表面２ａの垂直方向に対して３０度以上の角度で蛍光体内部から表面に到達した光は全反射して蛍光体領域（蛍光体層）２の内部に閉じ込められてしまう。これに対し、蛍光体領域（蛍光体層）２の表面２ａに光取り出し構造１３を形成すると、未処理表面では全反射していた光の一部も、全反射することなく、蛍光体領域（蛍光体層）２から空気層に通過する。すなわち、蛍光体領域（蛍光体層）２の表面２ａに光取り出し構造１３を設けることにより、屈折率差により蛍光体領域（蛍光体層）２の内部に閉じ込められる光を効率的に取り出すことができる。光取り出し構造１３としては、図３のようにアレイ状の突起を蛍光体領域（蛍光体層）２の表面２ａに形成することが考えられる。特に形成円錐状、四角推状のマイクロオーダーの微小構造体を用いると、正面方向への光取出しが改善される。   FIG. 3 shows an example of the phosphor portion 12 in which the light extraction structure 13 is provided on the surface 2 a of the phosphor region (phosphor layer) 2. As described above, since the refractive index of the phosphor ceramic (for example, YAG) is about 1.8 and is larger than the refractive index of air, the phosphor ceramic (phosphor layer) 2 has a surface 2a perpendicular to the vertical direction. Light reaching the surface from the inside of the phosphor at an angle of 30 degrees or more is totally reflected and confined within the phosphor region (phosphor layer) 2. On the other hand, when the light extraction structure 13 is formed on the surface 2a of the phosphor region (phosphor layer) 2, a part of the light totally reflected on the untreated surface is not totally reflected, and the phosphor region ( It passes from the phosphor layer 2 to the air layer. That is, by providing the light extraction structure 13 on the surface 2a of the phosphor region (phosphor layer) 2, it is possible to efficiently extract light confined inside the phosphor region (phosphor layer) 2 due to a difference in refractive index. it can. As the light extraction structure 13, it is conceivable to form array-shaped protrusions on the surface 2 a of the phosphor region (phosphor layer) 2 as shown in FIG. 3. In particular, when a micro-structure having a conical shape or a quadrangle-like shape is used, light extraction in the front direction is improved.

また、図４に示すように、蛍光体領域（蛍光体層）２の表面２ａに遮光板１４を設けることで、照明範囲と非照明範囲の境界を鮮明にすることが出来る。さらに、図５に示すように、遮光板１４によって遮光する部分の蛍光体領域（蛍光体層）２を削りその背面に反射構造体６を設けることで、蛍光体領域（蛍光体層）２内部で反射を繰り返すことを抑制することができ、光の取り出し効率を上げることができる。あるいは、図５のかわりに、図６に示すように、遮光部分の前面に反射構造体１６（遮光を兼ねた反射構造体）を設けることでも、同様の効果を得ることができる。   Moreover, as shown in FIG. 4, by providing the light shielding plate 14 on the surface 2a of the phosphor region (phosphor layer) 2, the boundary between the illumination range and the non-illumination range can be made clear. Further, as shown in FIG. 5, the phosphor region (phosphor layer) 2 in a portion shielded by the light shielding plate 14 is scraped, and a reflecting structure 6 is provided on the back surface thereof, so that the inside of the phosphor region (phosphor layer) 2. The repetition of reflection can be suppressed, and the light extraction efficiency can be increased. Alternatively, as shown in FIG. 6, instead of FIG. 5, a similar effect can be obtained by providing a reflective structure 16 (a reflective structure that also serves as a light shield) on the front surface of the light shielding portion.

また、上述の各例において、反射構造体６には、金属基板や酸化物セラミックス、非酸化セラミックスなどを使用可能であるが、特に高い光反射特性、伝熱特性、加工性を併せ持つ金属基板を使用するのが望ましい。金属としては、Ａｌ、Ｃｕ、Ｔｉ、Ｓｉ、Ａｇ、Ａｕ、Ｎｉ、Ｍｏ、Ｗ、Ｆｅ、Ｐｄなどの単体や、それらを含む合金が使用可能である。また、反射構造体６の表面に増反射や腐食防止を目的としたコーティングを施しても良い。また、蛍光体は光を変換する場合に発熱し、蛍光体は周囲温度が上昇すると変換効率が低下する温度消光という特性を持っている。蛍光体領域（蛍光体層）２の発光効率低下を防ぐには、より積極的に蛍光体領域（蛍光体層）２を冷却する必要があり、このため、蛍光体領域（蛍光体層）２の背面に冷却機構が設けられるのが良い。具体的に、冷却機構として、後述のように反射構造体６の背面に放熱フィン１７を設けても良いし、ファン等を用いて空冷しても良いし、ペルチェ素子の様な熱電素子を用いて冷却しても良い。このように、冷却機構を設けて反射構造体６の放熱性を高め、蛍光体領域（蛍光体層）２からの発熱を背面から放熱することで蛍光体領域（蛍光体層）２の変換効率低下を防止することが出来る。すなわち、高輝度化を図ることができる。   In each of the above-described examples, a metal substrate, oxide ceramics, non-oxide ceramics, or the like can be used for the reflective structure 6, but a metal substrate having particularly high light reflection characteristics, heat transfer characteristics, and workability is used. It is desirable to use it. As the metal, simple substances such as Al, Cu, Ti, Si, Ag, Au, Ni, Mo, W, Fe, Pd, and alloys containing them can be used. In addition, the surface of the reflective structure 6 may be coated for the purpose of increasing reflection and preventing corrosion. Further, the phosphor generates heat when converting light, and the phosphor has a characteristic of temperature quenching in which the conversion efficiency decreases as the ambient temperature rises. In order to prevent the luminous efficiency of the phosphor region (phosphor layer) 2 from decreasing, it is necessary to more actively cool the phosphor region (phosphor layer) 2, and for this reason, the phosphor region (phosphor layer) 2. It is preferable that a cooling mechanism is provided on the back surface of the slab. Specifically, as a cooling mechanism, a heat radiating fin 17 may be provided on the back surface of the reflective structure 6 as described later, or air cooling may be performed using a fan or the like, or a thermoelectric element such as a Peltier element is used. May be cooled. As described above, the cooling mechanism is provided to enhance the heat dissipation of the reflecting structure 6, and the heat generation from the phosphor region (phosphor layer) 2 is radiated from the back surface, thereby converting the phosphor region (phosphor layer) 2. Decrease can be prevented. That is, high luminance can be achieved.

また、蛍光体領域（蛍光体層）２を反射構造体６に接着するには（蛍光体領域（蛍光体層）２と反射構造体６とを接合するには）、有機接着剤、無機接着剤、低融点ガラス、金属ろう付けなどを用いることができる。これらの中でも、高い反射率と伝熱特性を両立可能な金属ろう付けを用いるのが望ましい。セラミックス（蛍光体領域（蛍光体層）２）と金属（反射構造体６）との接合は、まず、セラミックス側に金属膜を形成し、その金属膜と金属（反射構造体６）を金属ろう付けすることで可能である。セラミックスへの金属膜の形成は、真空中での蒸着法やスパッタ法、もしくは高融点金属法などが使用可能である。なお、高融点金属法とは、セラミックスの表面に金属微粒子を含む有機バインダーを塗布し、水蒸気と水素を含む還元雰囲気下で１０００〜１７００℃に加熱する方法である。このとき形成される金属膜には、Ｓｉ、Ｎｂ、Ｔｉ、Ｚｒ、Ｍｏ、Ｎｉ、Ｍｎ、Ｗ、Ｆｅ、Ｐｔ、Ａｌ、Ａｕ、Ｐｄ、Ｔａ、Ｃｕなどを含む単体や合金が用いられる。また、金属ろう材には、Ａｇ、Ｃｕ、Ｚｎ、Ｎｉ、Ｓｎ、Ｔｉ、Ｍｎ、Ｉｎ、Ｂｉなどを含むろう材が使用可能である。必要であれば金属膜と金属の接合面の酸化被膜をフラックスで除去し、接合面に金属ろう材を配置し、２００〜８００℃に加熱し、冷却することで、接合することができる。また、接合後にセラミックスと金属の膨張係数の差による接合面の破壊を防ぐために、セラミックスと金属の中間の膨張係数を有する物質を介在させて接合を行っても良い。   Further, in order to bond the phosphor region (phosphor layer) 2 to the reflective structure 6 (to join the phosphor region (phosphor layer) 2 and the reflective structure 6), an organic adhesive or an inorganic adhesive is used. An agent, low melting point glass, metal brazing, or the like can be used. Among these, it is desirable to use metal brazing that can achieve both high reflectance and heat transfer characteristics. In joining ceramics (phosphor region (phosphor layer) 2) and metal (reflection structure 6), first, a metal film is formed on the ceramic side, and the metal film and metal (reflection structure 6) are brazed to metal. It is possible by attaching. The metal film can be formed on the ceramic by a vacuum deposition method, a sputtering method, a refractory metal method, or the like. The refractory metal method is a method in which an organic binder containing metal fine particles is applied to the surface of a ceramic and heated to 1000 to 1700 ° C. in a reducing atmosphere containing water vapor and hydrogen. For the metal film formed at this time, a simple substance or an alloy containing Si, Nb, Ti, Zr, Mo, Ni, Mn, W, Fe, Pt, Al, Au, Pd, Ta, Cu, or the like is used. Further, as the metal brazing material, a brazing material containing Ag, Cu, Zn, Ni, Sn, Ti, Mn, In, Bi, or the like can be used. If necessary, the oxide film on the joining surface of the metal film and the metal can be removed with a flux, a metal brazing material is placed on the joining surface, heated to 200 to 800 ° C., and cooled to be joined. Further, in order to prevent destruction of the joint surface due to the difference in expansion coefficient between the ceramic and the metal after joining, the joining may be performed with a substance having an intermediate expansion coefficient between the ceramic and the metal interposed.

上記のように、本発明の構成例では、基本的に、蛍光体部１２は、固体光源５からの励起光により励起され該固体光源５の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域２と、蛍光体領域２の背面（励起光が入射する側の面とは反対の面側）に設けられた反射構造体６とを有し、反射構造体６は、該蛍光体領域２内で発生した蛍光と励起光を蛍光体領域２の表面２ａに点状に集光させるように反射する形状（図２の例では、所定の半径の曲率を有する凹曲面の形状）の反射面６ａを蛍光体領域２の背面に有しているので、蛍光体領域２からの蛍光および励起光を効率的に光学系（後述の光学系（レンズ系）２０）へ導入して利用することができる。すなわち、光学系への光の導入効率を著しく向上させることができる。   As described above, in the configuration example of the present invention, basically, the phosphor portion 12 is excited by excitation light from the solid light source 5 and emits fluorescence having a wavelength longer than the emission wavelength of the solid light source 5. A phosphor region 2 made of a kind of phosphor, and a reflecting structure 6 provided on the back surface of the phosphor region 2 (the surface opposite to the surface on which excitation light is incident), 6 is a shape that reflects the fluorescence and excitation light generated in the phosphor region 2 so as to be condensed in a spot shape on the surface 2a of the phosphor region 2 (in the example of FIG. 2, it has a curvature with a predetermined radius). Since the reflecting surface 6a having a concave curved surface is provided on the back surface of the phosphor region 2, the fluorescence and excitation light from the phosphor region 2 can be efficiently reflected in the optical system (an optical system (lens system) 20 described later). It can be introduced and used. That is, the light introduction efficiency into the optical system can be significantly improved.

より詳細に、蛍光体領域を板状に加工した場合には、蛍光体領域の表面で反射した光が内部に閉じ込められるが、本発明では、背面の反射構造体６の反射面６ａの凹曲面の形状（曲率など）を最適化することで、蛍光体領域２で発生した蛍光と励起光を蛍光体領域２の表面２ａに臨界角以下の角度で集光させることができるため、光の取り出し効率を高めることができる。すなわち、本発明では、反射構造体６の反射面６ａの凹曲面の形状を最適化することで、蛍光体領域２内で発生した蛍光と励起光を蛍光体領域２の表面２ａに照明装置にとって最適な輝度分布で集光させることができる。このことからもわかるように、反射構造体６の反射面６ａの凹曲面の形状（凹曲面の曲率など）は、蛍光体領域２で発生した蛍光と励起光が蛍光体領域２の表面２ａに臨界角以下の角度で集光するように設計（最適設計）されるのが良い。   In more detail, when the phosphor region is processed into a plate shape, the light reflected by the surface of the phosphor region is confined inside, but in the present invention, the concave curved surface of the reflecting surface 6a of the reflecting structure 6 on the back surface. By optimizing the shape (curvature, etc.) of the light, the fluorescence and excitation light generated in the phosphor region 2 can be condensed on the surface 2a of the phosphor region 2 at an angle less than the critical angle, so that light extraction is possible. Efficiency can be increased. That is, in the present invention, by optimizing the shape of the concave surface of the reflecting surface 6a of the reflecting structure 6, the fluorescence and excitation light generated in the phosphor region 2 are applied to the surface 2a of the phosphor region 2 for the lighting device. Light can be condensed with an optimal luminance distribution. As can be seen from this, the shape of the concave surface (such as the curvature of the concave surface) of the reflection surface 6a of the reflection structure 6 is such that the fluorescence and excitation light generated in the phosphor region 2 are applied to the surface 2a of the phosphor region 2. It is preferable to design (optimal design) so that light is collected at an angle less than the critical angle.

また、図１に示すように、上記光源装置と光学系（レンズ系）２０とを組み合わせることで（上記光源装置からの出射光を光学系（レンズ系）２０に通して照明光とすることで）、照明装置を構成することができ、この照明装置では、蛍光体領域２からの蛍光および励起光が効率的に光学系（レンズ系）２０へ導入されるので、光効率の良い照明が可能となり、より高輝度な照明光を得ることができる。さらに、蛍光体領域２内で発生した蛍光と励起光を蛍光体領域２の表面２ａに向けて点状に集光させて光学系（レンズ系）２０へ導入できるので、照明装置の光学系（レンズ系）２０を小型化することが可能となり、照明装置の光学系（レンズ系）２０の小型化が可能となることで、照明装置自体の小型化が可能となり、製造コストの低減、設置スペースの制約が少なくなるなどの利点がある。また、蛍光体領域２内で発生した蛍光と励起光を蛍光体領域２の表面２ａに向けて点状に集光させることで、投影光の色むらや輝度むらを低減することが可能となり、より均一な照明が可能な照明装置を実現できる。   Further, as shown in FIG. 1, by combining the light source device and the optical system (lens system) 20, the light emitted from the light source device is passed through the optical system (lens system) 20 as illumination light. ), An illumination device can be configured, and in this illumination device, the fluorescence and excitation light from the phosphor region 2 are efficiently introduced into the optical system (lens system) 20, so that illumination with high light efficiency is possible. Thus, illumination light with higher brightness can be obtained. Furthermore, since the fluorescence and excitation light generated in the phosphor region 2 can be condensed in a dot shape toward the surface 2a of the phosphor region 2 and introduced into the optical system (lens system) 20, the optical system ( The lens system) 20 can be downsized, and the optical system (lens system) 20 of the illuminating device can be miniaturized, so that the illuminating device itself can be downsized, the manufacturing cost can be reduced, and the installation space can be reduced. There are advantages such as fewer restrictions. Further, by condensing the fluorescence and excitation light generated in the phosphor region 2 toward the surface 2a of the phosphor region 2 in a spot shape, it becomes possible to reduce the color unevenness and luminance unevenness of the projection light, An illumination device capable of more uniform illumination can be realized.

図７には、本発明の照明装置の具体例が示されている。なお、図７において、図１乃至図６と同様の箇所には同じ符号を付している。図７を参照すると、この照明装置は、蛍光体領域２の背面に冷却用の放熱フィン１７が接着して設けられ、固体光源５（例えば青色半導体レーザー）とレンズ系２０とを一体化し、ケース３０に入れたものとなっている。   FIG. 7 shows a specific example of the lighting device of the present invention. In FIG. 7, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals. Referring to FIG. 7, this lighting device is provided with a cooling heat radiation fin 17 adhered to the back surface of the phosphor region 2, and the solid state light source 5 (for example, blue semiconductor laser) and the lens system 20 are integrated into a case. It has been put in 30.

また、図８（ａ），（ｂ）には、本発明の光源装置を複数個、方向指示器やポジションランプと組み合わせた照明装置（自動車用前照灯モジュール）の例が示されている。なお、図８（ａ）は自動車用前照灯モジュールの概略正面図、図８（ｂ）は図８（ａ）のＡ−Ａ線における断面図である。図８（ａ），（ｂ）において、符号４１は照明装置（自動車用前照灯モジュール）、４２はロウビーム、４３はポジションランプ、４４はハイビーム、４５は方向指示器、４６はフォグランプである。   FIGS. 8A and 8B show an example of a lighting device (automobile headlight module) in which a plurality of light source devices of the present invention are combined with a direction indicator and a position lamp. 8A is a schematic front view of the automotive headlamp module, and FIG. 8B is a cross-sectional view taken along the line AA in FIG. 8A. 8 (a) and 8 (b), reference numeral 41 denotes a lighting device (automobile headlight module), 42 is a low beam, 43 is a position lamp, 44 is a high beam, 45 is a direction indicator, and 46 is a fog lamp.

このように、本発明の光源装置は、一般照明、自動車用照明、プロジェクター表示装置などの照明装置に用いることができる。   Thus, the light source device of the present invention can be used for lighting devices such as general lighting, automotive lighting, and projector display devices.

なお、上述の構成例（例えば図１の構成例）では、固体光源５からの励起光を蛍光体部１２（蛍光体領域２）に直接入射させたが、図９に示すように、固体光源５からの励起光を例えば反射手段３６で反射させて蛍光体部１２（蛍光体領域２）に入射させたりしても良い。   In the above configuration example (for example, the configuration example in FIG. 1), the excitation light from the solid light source 5 is directly incident on the phosphor portion 12 (phosphor region 2). However, as shown in FIG. For example, the excitation light from 5 may be reflected by the reflecting means 36 and incident on the phosphor portion 12 (phosphor region 2).

本発明は、一般照明、自動車用照明、プロジェクター表示装置などに利用可能である。
The present invention can be used for general lighting, automotive lighting, projector display devices, and the like.

２ 蛍光体領域（蛍光体層）
２ａ 蛍光体領域２の表面
５ 固体光源
６ 反射構造体
６ａ 反射面
１２ 蛍光体部
１３ 光取り出し構造
１４ 遮光板
１６ 遮光を兼ねた反射構造体
１７ 放熱フィン
２０ 光学系（レンズ系）
３６ 反射手段 2 Phosphor region (phosphor layer)
2a Surface of phosphor region 2 5 Solid light source 6 Reflective structure 6a Reflective surface 12 Phosphor portion 13 Light extraction structure 14 Light shielding plate 16 Reflective structure also serving as light shielding 17 Radiation fin 20 Optical system (lens system)
36 Reflection means

Claims (5)

紫外光から可視光までの波長領域のうちの所定の波長の光を発光する固体光源と、該固体光源からの励起光により励起され該固体光源の発光波長よりも長波長の蛍光を発光する少なくとも１種類の蛍光体からなる蛍光体領域と、該蛍光体領域内で発生した蛍光と励起光を前記蛍光体領域の表面に点状に集光させるように反射する形状の反射面を前記蛍光体領域の背面に有していることを特徴とする光源装置。 A solid-state light source that emits light of a predetermined wavelength in a wavelength region from ultraviolet light to visible light, and at least emits fluorescence having a wavelength longer than the emission wavelength of the solid-state light source when excited by excitation light from the solid-state light source A phosphor region formed of one kind of phosphor, and a reflecting surface having a shape that reflects the fluorescence and excitation light generated in the phosphor region so as to be condensed in a spot shape on the surface of the phosphor region; A light source device characterized in that the light source device is provided on the back surface of the region. 請求項１記載の光源装置において、前記蛍光体領域の表面に光取り出し構造を有することを特徴とする光源装置。 The light source device according to claim 1, further comprising a light extraction structure on a surface of the phosphor region. 請求項１または請求項２記載の光源装置において、前記蛍光体領域の表面に遮光板を有することを特徴とする光源装置。 3. The light source device according to claim 1, further comprising a light shielding plate on a surface of the phosphor region. 請求項１乃至請求項３のいずれか一項に記載の光源装置が用いられていることを特徴とする照明装置。 An illumination device, wherein the light source device according to any one of claims 1 to 3 is used. 請求項１乃至請求項３のいずれか一項に記載の光源装置が用いられていることを特徴とする自動車用前照灯。 An automotive headlamp, wherein the light source device according to any one of claims 1 to 3 is used.
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