JP2015011796A - Light-emitting member, and light projection structure using the same - Google Patents
Light-emitting member, and light projection structure using the same Download PDFInfo
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本開示は、前照灯、スポットライト用光源等の各種照明装置に利用することが可能な発光部材とこれを用いた投光構造体に関する。 The present disclosure relates to a light emitting member that can be used in various illumination devices such as a headlight and a light source for a spotlight, and a light projecting structure using the light emitting member.
従来この種の投光構造体は、図１５に示すごとく、頂点近傍に焦点が位置する深い凹面状に形成された反射面４１ａを有する反射部材４１と、前記焦点及びその周辺に配置され、励起光により励起されることにより光を出射する発光部材４２と、を有する。 Conventionally, as shown in FIG. 15, this type of light projecting structure has a reflecting member 41 having a reflecting surface 41 a formed in a deep concave shape with a focal point located in the vicinity of the apex, and is disposed at the focal point and its surroundings. And a light emitting member 42 that emits light when excited by light.
発光部材４２は、レーザ４３からの励起光Ｌ１を吸収して蛍光を発生する蛍光材料の粉末を樹脂などに混ぜて固めたもの、あるいは蛍光材料の粒子をバインダーに混ぜて塗布したものであった。 The light emitting member 42 is obtained by mixing and hardening a powder of a fluorescent material that absorbs the excitation light L1 from the laser 43 in a resin or the like, or by applying particles of a fluorescent material in a binder. .
なお、この出願に関する先行技術文献情報としては、例えば、特許文献１が知られている。 As prior art document information relating to this application, for example, Patent Document 1 is known.
このような従来の投光構造体では、耐熱性が悪いことが問題となっていた。 Such a conventional light projecting structure has a problem of poor heat resistance.
すなわち、上記従来の構成においては、発光部材４２の温度が上昇あるいは下降した場合、その中に含まれる蛍光材料の粒子の熱膨張係数と、樹脂、バインダーなどの被覆材の熱膨張係数とが異なる。そのため、被覆材における蛍光材料の粒子付近において局所的に応力が加わり、被覆材にクラック等が生じてしまう可能性があり、耐熱性が悪くなってしまっていた。 That is, in the above conventional configuration, when the temperature of the light emitting member 42 is increased or decreased, the thermal expansion coefficient of the particles of the fluorescent material contained therein and the thermal expansion coefficient of the coating material such as resin or binder are different. . For this reason, stress is locally applied in the vicinity of the fluorescent material particles in the covering material, which may cause cracks in the covering material, resulting in poor heat resistance.
そこで本開示は、蛍光材料と被覆材とを有する発光部材とこれを用いた投光構造体の耐熱性を改善することを目的とする。 Then, this indication aims at improving the heat resistance of the light emitting member which has a fluorescent material and a coating | covering material, and a light projection structure using the same.
そして、この目的を達成するために本開示は、励起光を吸収して蛍光を発生する蛍光材料と、前記蛍光材料をその内部に含み、前記蛍光の少なくとも一部を透過する液体またはゲル状の第１の被覆材と、前記第１の被覆材をその内部に含み、前記蛍光の少なくとも一部を透過する固体の第２の被覆材と、を有する構成とした。 In order to achieve this object, the present disclosure includes a fluorescent material that absorbs excitation light and generates fluorescence, and a liquid or gel-like material that includes the fluorescent material therein and transmits at least a part of the fluorescence. A first covering material and a solid second covering material that includes the first covering material therein and transmits at least a part of the fluorescence are used.
このような構成とすることにより、蛍光材料の熱膨張係数と第１の被覆材の熱膨張係数との違いによって生じる応力が、液体またはゲル状の第１の被覆材内で分散されるため、前記蛍光材料の粒子付近において前記第１の被覆材が破壊されるのを抑制することができ、その結果として耐熱性を向上させることができる。 By adopting such a configuration, the stress generated by the difference between the thermal expansion coefficient of the fluorescent material and the thermal expansion coefficient of the first coating material is dispersed in the liquid or gel-like first coating material, It is possible to suppress the destruction of the first covering material in the vicinity of the particles of the fluorescent material, and as a result, it is possible to improve heat resistance.
（実施の形態１）
以下、実施の形態１における発光部材について図面を参照しながら説明する。
(Embodiment 1)
Hereinafter, the light emitting member in Embodiment 1 will be described with reference to the drawings.
実施の形態１における発光部材１０は、図１に示すごとく、励起光を吸収して蛍光を発生する蛍光材料１と、蛍光材料１をその内部に含み、蛍光の少なくとも一部を透過する液体またはゲル状の第１の被覆材２と、第１の被覆材２をその内部に含み、前記蛍光の少なくとも一部を透過する固体の第２の被覆材３と、を有する構成としている。 As shown in FIG. 1, the light emitting member 10 in the first embodiment includes a fluorescent material 1 that absorbs excitation light and generates fluorescence, and a liquid that contains the fluorescent material 1 therein and transmits at least part of the fluorescence. The gel-like first coating material 2 and the solid second coating material 3 that includes the first coating material 2 therein and transmits at least a part of the fluorescence are used.
このような構成とすることにより、蛍光材料１の熱膨張係数と第１の被覆材２の熱膨張係数との違いによって生じる応力が、液体またはゲル状の第１の被覆材２内で分散されるため、蛍光材料１の粒子付近において第１の被覆材２が破壊されるのを抑制することができ、その結果として耐熱性を向上させることができる。 With such a configuration, the stress generated by the difference between the thermal expansion coefficient of the fluorescent material 1 and the thermal expansion coefficient of the first covering material 2 is dispersed in the liquid or gel-like first covering material 2. Therefore, it can suppress that the 1st coating | covering material 2 is destroyed in the particle | grain vicinity of the fluorescent material 1, As a result, heat resistance can be improved.
以下、必須ではない任意の構成要素を含め、より具体的な実施例の説明を行う。 Hereinafter, more specific examples will be described including optional components that are not essential.
図２に示すごとく、励起光を吸収して蛍光を発生する蛍光材料１をその内部に含む第１の被覆材２が、支持基板３Ａとカバー部材３Ｂとからなる第２の被覆材３の内部に設けられている。具体的には、支持基板３Ａが複数の凹部を有しており、前記複数の凹部の開口部をカバー部材３Ｂが閉ざし、前記凹部に蛍光材料１を混合された第１の被覆材２が配置されている。ここで、第１の被覆材２は、例えば水、アルコール、フロリナートなどの液体、または、例えば、ナノシリカなどがコロイド分散されたゾル、または、例えばシリコーン、シロキサン、シリコーンオイルなどのゲルもしくはゲル状物質などにより構成しており、第２の被覆材３は例えばガラス、サファイア、酸化亜鉛、窒化ガリウム、窒化アルミニウムなどの固体の透過性材料により構成している。 As shown in FIG. 2, the inside of the second covering material 3 comprising a support substrate 3A and a cover member 3B is a first covering material 2 containing therein a fluorescent material 1 that absorbs excitation light and generates fluorescence. Is provided. Specifically, the support substrate 3A has a plurality of recesses, the cover member 3B closes the openings of the plurality of recesses, and the first covering material 2 in which the fluorescent material 1 is mixed is disposed in the recesses. Has been. Here, the first covering material 2 is, for example, a liquid such as water, alcohol, or fluorinate, or a sol in which nano silica or the like is colloidally dispersed, or a gel or a gel-like substance such as silicone, siloxane, or silicone oil. The second covering material 3 is made of a solid transparent material such as glass, sapphire, zinc oxide, gallium nitride, and aluminum nitride.
この図２において、例えば光源から青色の光が入射してくるような場合、第１の被覆材２に混合された蛍光材料１には黄色光を放射するＣｅ賦活ＹＡＧ系蛍光体（（Ｙ，Ｇｄ）３（Ａｌ，Ｇａ）５Ｏ１２:Ｃｅ）、Ｅｕ賦活α−ＳｉＡｌＯＮ蛍光体、Ｅｕ賦活（Ｂａ、Ｓｒ）Ｓｉ２Ｏ２Ｎ２蛍光体等を用いることができる。そうすることで、入射光の内、第２の被覆材３を透過して出射される青色光と、蛍光材料１により放射される黄色光とが混合され、白色光を出射することが可能となる。 In FIG. 2, for example, when blue light is incident from a light source, Ce-activated YAG phosphor ((Y, Gd) 3 (Al, Ga) 5 O 12 : Ce), Eu-activated α-SiAlON phosphor, Eu-activated (Ba, Sr) Si 2 O 2 N 2 phosphor, and the like can be used. By doing so, it is possible to mix the blue light emitted through the second covering material 3 and the yellow light emitted from the fluorescent material 1 in the incident light, and emit white light. Become.
なお、図３に示すごとく、支持基板３Ａが有する複数の凹部にそれぞれ別の蛍光材料１を配置する構成とすることもできる。具体的には、蛍光材料１が青色光を放射する蛍光材料１Ｂと、赤色光を放射する蛍光材料１Ｒと、緑色光を放射する蛍光材料１Ｇを有しており、前記複数の凹部における第１の凹部内に蛍光材料１Ｂを配置し、第２の凹部内に蛍光材料１Ｒを配置し、第３の凹部内に蛍光材料１Ｇを配置している。 In addition, as shown in FIG. 3, it can also be set as the structure which arrange | positions another fluorescent material 1 to several recessed part which 3 A of support substrates have, respectively. Specifically, the fluorescent material 1 includes a fluorescent material 1B that emits blue light, a fluorescent material 1R that emits red light, and a fluorescent material 1G that emits green light, and the first in the plurality of recesses. The fluorescent material 1B is disposed in the concave portion, the fluorescent material 1R is disposed in the second concave portion, and the fluorescent material 1G is disposed in the third concave portion.
このような構成とすることにより、例えば青紫色レーザを光源とする場合には、この青紫色光を吸収した蛍光材料１Ｂが青色光を放射し、蛍光材料１Ｒが赤色光を放射し、蛍光材料１Ｇが緑色光を放射する。これらの光を出射側にて混合し、白色光として出射することが可能である。なお、青色光を放射する蛍光材料１Ｂとしては例えば、Ｅｕ賦活ＢａＭｇＡｌ１０Ｏ１７蛍光体、Ｅｕ賦活Ｓｒ３ＭｇＳｉ２Ｏ８蛍光体などで構成される青色蛍光体を、赤色光を放射する蛍光材料１Ｒとしては例えば、Ｅｕ賦活（Ｓｒ、Ｃａ）ＡｌＳｉＮ３蛍光体、Ｅｕ賦活ＣａＡｌＳｉＮ３蛍光体、Ｙ２Ｏ２Ｓ：Ｅｕ３＋蛍光体などで構成される赤色蛍光体を、緑色光を放射する蛍光材料１Ｇとしては例えばＥｕ賦活β−ＳｉＡｌＯＮ蛍光体（（Ｓｉ，Ａｌ）１２（Ｏ，Ｎ）１６：Ｅｕ２＋）、Ｅｕ賦活ＳｒＳｉ２Ｏ２Ｎ２蛍光体、Ｅｕ賦活（Ｂａ、Ｓｒ）Ｓｉ２Ｏ２Ｎ２蛍光体などの緑色蛍光体を用いることができる。 With such a configuration, for example, when a blue-violet laser is used as a light source, the fluorescent material 1B that absorbs the blue-violet light emits blue light, the fluorescent material 1R emits red light, and the fluorescent material 1G emits green light. These lights can be mixed on the emission side and emitted as white light. Incidentally, the fluorescent material as the fluorescent material 1B which emits blue light for example, the Eu-activated BaMgAl 10 O 17 phosphor, a blue phosphor configured like Eu activated Sr 3 MgSi 2 O 8 phosphor emits red light As 1R, for example, a red phosphor composed of Eu-activated (Sr, Ca) AlSiN 3 phosphor, Eu-activated CaAlSiN 3 phosphor, Y 2 O 2 S: Eu 3+ phosphor, etc., and fluorescent light that emits green light. Examples of the material 1G include Eu-activated β-SiAlON phosphor ((Si, Al) 12 (O, N) 16 : Eu 2+ ), Eu-activated SrSi 2 O 2 N 2 phosphor, Eu-activated (Ba, Sr) Si 2. A green phosphor such as an O 2 N 2 phosphor can be used.
また、図４に示すごとく、蛍光材料１が青色光を放射する蛍光材料１Ｂと、黄色光を放射する蛍光材料１Ｙとを有しており、前記複数の凹部における第１の凹部内に蛍光材料１Ｂを配置し、第２の凹部内に蛍光材料１Ｙを配置する構成としてもよい。このような構成とすることにより、例えば青紫色レーザを光源とする場合には、この青紫色光を吸収した蛍光材料１Ｂが青色光を放射し、蛍光材料１Ｙが黄色光を放射する。これらの光が出射側にて混合され、白色光として出射することが可能である。なお、黄色光を放射する蛍光材料１ＹとしてはＣｅ賦活ＹＡＧ（イットリウム・アルミニウム・ガーネット）系蛍光体（（Ｙ，Ｇｄ）３（Ａｌ，Ｇａ）5Ｏ１２:Ｃｅ）、Ｅｕ賦活α−ＳｉＡｌＯＮ蛍光体（Ｃａ（Ｓｉ、Ａｌ）１２，（Ｏ，Ｎ）１６：Ｅｕ２＋）、Ｅｕ賦活（Ｂａ、Ｓｒ）Ｓｉ２Ｏ２Ｎ２蛍光体などの黄色蛍光体を用いることができる。 Further, as shown in FIG. 4, the fluorescent material 1 includes a fluorescent material 1B that emits blue light and a fluorescent material 1Y that emits yellow light, and the fluorescent material is in the first recesses of the plurality of recesses. It is good also as a structure which arrange | positions 1B and arrange | positions fluorescent material 1Y in a 2nd recessed part. With such a configuration, for example, when a blue-violet laser is used as a light source, the fluorescent material 1B that absorbs the blue-violet light emits blue light, and the fluorescent material 1Y emits yellow light. These lights are mixed on the emission side, and can be emitted as white light. The fluorescent material 1Y that emits yellow light includes Ce-activated YAG (yttrium, aluminum, garnet) -based phosphor ((Y, Gd) 3 (Al, Ga) 5 O 12 : Ce), Eu-activated α-SiAlON fluorescence. Yellow phosphors such as the body (Ca (Si, Al) 12 , (O, N) 16 : Eu 2+ ) and Eu activated (Ba, Sr) Si 2 O 2 N 2 phosphor can be used.
なお、本実施の形態においては、第２の被覆材３の支持基板３Ａにおける複数の凹部の形状を、六角錐台形状としており、六角錐台の下底を前記凹部の開口部とする構成としている。そして、ある凹部における開口部の一辺と他の凹部における開口部の一辺とが隣接するよう配置しており、前記複数の凹部を蜂の巣状に隙間無く配置している。この構成により、支持基板３Ａ側から入射した入射光が、蛍光材料１に入射せずに、支持基板３Ａの一部であり前記複数の凹部を分離する分離部３Ａ１を通過することを抑制している。その結果、前記入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減させることができる。 In the present embodiment, the shape of the plurality of recesses in the support substrate 3A of the second covering material 3 is a hexagonal frustum shape, and the bottom of the hexagonal frustum is the opening of the recess. Yes. And it arrange | positions so that the one side of the opening part in a certain recessed part and the one side of the opening part in another recessed part may adjoin, and arrange | positions the said several recessed part in a honeycomb shape without gap. With this configuration, incident light incident from the support substrate 3A side is prevented from entering the fluorescent material 1 and passing through the separation portion 3A1 that is part of the support substrate 3A and separates the plurality of recesses. Yes. As a result, the incident light can be prevented from entering and passing through the cover member 3B without being converted by the fluorescent material 1.
さらに、蛍光材料１を複数の凹部のそれぞれに格納する構成としていることにより、投光構造体が傾いて配置されたり、振動などが発光部材１０に印加されたりするような場合においても、蛍光材料１が発光部材１０の一部の領域に偏って移動することを抑制することができる。 Furthermore, since the fluorescent material 1 is configured to be stored in each of the plurality of recesses, the fluorescent material can be used even when the light projecting structure is inclined and vibration is applied to the light emitting member 10. 1 can be prevented from moving toward a partial region of the light emitting member 10.
なお、前記複数の凹部の形状を、六角錐台形状、または六角錐形状とすることにより、第２の被覆材上方から見た時に前記複数の凹部を蜂の巣状に隙間無く配置することができ、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果をより効率よく得ることができる。 In addition, by making the shape of the plurality of recesses a hexagonal frustum shape, or a hexagonal pyramid shape, the plurality of recesses can be arranged in a honeycomb shape without gaps when viewed from above the second covering material, The effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1 can be obtained more efficiently.
特に、前記複数の凹部の形状は、六角錐形状よりも六角錐台形状とすることが好ましい。六角錐台形状とすることにより、その上底から下底への傾きを変化させることで、第２の被覆材３と第１の被覆材２との体積比率を自由に変えることができる。 In particular, the shape of the plurality of recesses is preferably a hexagonal frustum shape rather than a hexagonal pyramid shape. By adopting the hexagonal frustum shape, the volume ratio between the second covering material 3 and the first covering material 2 can be freely changed by changing the inclination from the upper base to the lower base.
なお、前記複数の凹部の形状を、四角錐台形状、または四角錐形状とした場合においては、ある凹部における開口部の一辺と他の凹部における開口部の一辺とが隣接するよう配置しており、第２の被覆材上方から見た時に前記複数の凹部を格子状に隙間無く配置することができ、前記入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得ることができる。ただし、六角錐台形状、または六角錐形状とする方が、衝撃などに対し、より安定的な形状であるため好ましい。 In addition, when the shape of the plurality of concave portions is a quadrangular pyramid shape or a quadrangular pyramid shape, the one side of the opening in one concave portion and the one side of the opening in the other concave portion are adjacent to each other. When viewed from above the second covering material, the plurality of recesses can be arranged without gaps in a lattice pattern, and the incident light is prevented from entering and passing through the cover member 3B without being converted by the fluorescent material 1. Effect can be obtained. However, the hexagonal frustum shape or the hexagonal pyramid shape is preferable because it is a more stable shape against impact and the like.
なお、前記複数の凹部の形状は、四角錐形状よりも四角錐台形状とすることが好ましい。四角錐台形状とすることにより、その上底から下底への傾きを変化させることで、第２の被覆材３と第１の被覆材２との体積比率を自由に変えることができる。 The plurality of recesses preferably have a quadrangular pyramid shape rather than a quadrangular pyramid shape. By adopting a quadrangular pyramid shape, the volume ratio between the second covering material 3 and the first covering material 2 can be freely changed by changing the inclination from the upper base to the lower base.
なお、前記ある凹部と前記他の凹部との幅が極小となる部分が前記凹部の開口部以外の部分であってもよい。即ち、角錐台の上底を前記凹部の開口部とするような構成としても、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得ることができる。ただし、角錐台の下底を前記凹部の開口部とするような構成とすることにより、支持基板３Ａに第１の被覆材２を充填し易くすることができるため好ましい。 Note that a portion where the width between the certain recess and the other recess is minimized may be a portion other than the opening of the recess. That is, even if the top base of the truncated pyramid is used as the opening of the concave portion, it is possible to obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1. . However, it is preferable to configure the lower base of the truncated pyramid to be the opening of the concave portion because the first covering material 2 can be easily filled in the support substrate 3A.
なお、前記凹部の形状は角錐台に限られず、円錐、円錐台としても構わない。ただし、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果をより効率よく得るためには、前記凹部の形状を角錐台とすることがより好ましい。 The shape of the recess is not limited to a truncated pyramid, and may be a cone or a truncated cone. However, in order to more efficiently obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1, it is more preferable that the shape of the concave portion is a truncated pyramid.
なお、前記凹部の形状を角柱状としてもかまわない。ただし、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得るためには複数の角柱状の凹部をできるだけ近づけて配置する必要があるため、支持基板３Ａの加工精度の観点からは、前記凹部を角錐台形状とする方が前記凹部の開口部のみを近づける様に形成すれば足りるため好ましい。 The shape of the recess may be a prism shape. However, since it is necessary to arrange a plurality of prismatic concave portions as close as possible in order to obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1, the support substrate From the viewpoint of the processing accuracy of 3A, it is preferable that the concave portion has a truncated pyramid shape because it is sufficient to form only the opening of the concave portion.
なお、図５に示すごとく、カバー部材３Ｂを透過性材料により構成しておき、支持基板３Ｃをアルミニウムなどの反射率の高い金属材料で構成することにより、レーザ等の光源からの励起光の入射側の面から、蛍光材料１による蛍光を放射する構成とすることも可能である。このような構成とした場合、レーザ等の光源からの励起光がカバー部材３Ｂを透過し、その一部が第１の被覆材２内の蛍光材料１に吸収される。そして蛍光材料１からの蛍光が支持基板３Ｃに反射され、カバー部材３Ｂを透過してレーザ等の光源からの励起光の入射側へと放射される。一方、蛍光材料１に吸収されなかったレーザ等の光源からの励起光は、そのまま支持基板３Ｃに反射され、カバー部材３Ｂを透過してレーザ等の光源からの励起光の入射側へと放射される。 As shown in FIG. 5, the cover member 3B is made of a transmissive material, and the support substrate 3C is made of a highly reflective metal material such as aluminum, so that excitation light from a light source such as a laser is incident. It is also possible to adopt a configuration in which fluorescence from the fluorescent material 1 is emitted from the side surface. In such a configuration, excitation light from a light source such as a laser passes through the cover member 3 </ b> B, and a part thereof is absorbed by the fluorescent material 1 in the first covering material 2. Then, the fluorescence from the fluorescent material 1 is reflected by the support substrate 3C, passes through the cover member 3B, and is emitted to the incident side of excitation light from a light source such as a laser. On the other hand, excitation light from a light source such as a laser that has not been absorbed by the fluorescent material 1 is directly reflected by the support substrate 3C, passes through the cover member 3B, and is emitted to the incident side of the excitation light from the light source such as a laser. The
なお、この図５において、支持基板３Ｃに設けられた複数の凹部にそれぞれ別の蛍光材料１を配置する構成とすることもできる。 In FIG. 5, another fluorescent material 1 may be arranged in each of the plurality of recesses provided in the support substrate 3 </ b> C.
具体的には、図６に示すごとく、蛍光材料１が青色光を放射する蛍光材料１Ｂが内在する第１の被覆材２を第１の凹部に配置し、黄色光を放射する蛍光材料１Ｙが内在する第１の被覆材２を第２の凹部に配置している。 Specifically, as shown in FIG. 6, the fluorescent material 1Y in which the fluorescent material 1 emits blue light is disposed in the first recess, and the fluorescent material 1Y that emits yellow light is disposed. The inherent first covering material 2 is arranged in the second recess.
なお、この複数の蛍光材料１としては、青色光を放射する蛍光材料１Ｂと、黄色光を放射する蛍光材料１Ｙに限定されず、赤色光を放射する蛍光材料１Ｒや、緑色光を放射する蛍光材料１Ｇを用いても構わない。 The plurality of fluorescent materials 1 are not limited to the fluorescent material 1B that emits blue light and the fluorescent material 1Y that emits yellow light, but the fluorescent material 1R that emits red light, and the fluorescence that emits green light. The material 1G may be used.
なお、図７に示すごとく、支持基板３Ａ、３Ｃにおける一つの凹部内に複数の蛍光材料１、例えば青色光を放射する蛍光材料１Ｂ、黄色光を放射する蛍光材料１Ｙと混合された第１の被覆材２を設けた場合、発光部材１０からの放射光を可変状態とすることができる。即ち、発光部材１０に熱が加わると、第１の被覆材２内で対流が起こる。この対流を利用して蛍光材料１Ｂと蛍光材料１Ｙの分散位置を可変させることにより、様々な光を連続的に照射する構成を実現することも可能である。なお、この複数の蛍光材料１としては、青色光を放射する蛍光材料１Ｂと、黄色光を放射する蛍光材料１Ｙに限定されず、赤色光を放射する蛍光材料１Ｒや、緑色光を放射する蛍光材料１Ｇを用いても構わない。 In addition, as shown in FIG. 7, a plurality of fluorescent materials 1, such as a fluorescent material 1B that emits blue light and a fluorescent material 1Y that emits yellow light, are mixed in a single recess in the support substrates 3A and 3C. When the coating | covering material 2 is provided, the emitted light from the light emitting member 10 can be made into a variable state. That is, when heat is applied to the light emitting member 10, convection occurs in the first covering material 2. By using this convection to vary the dispersion position of the fluorescent material 1B and the fluorescent material 1Y, it is possible to realize a configuration in which various lights are continuously irradiated. The plurality of fluorescent materials 1 are not limited to the fluorescent material 1B that emits blue light and the fluorescent material 1Y that emits yellow light, but the fluorescent material 1R that emits red light, and the fluorescence that emits green light. The material 1G may be used.
なお、第１の被覆材２における蛍光材料１の含有率は体積比率で例えば２０〜７０％としている。この含有率にすることにより、外部より入射してきた入射光を効率よく蛍光体材料に吸収させ、異なる波長の放射光を高い変換効率で放射させることが可能となる。 In addition, the content rate of the fluorescent material 1 in the 1st coating | covering material 2 is 20-70% by the volume ratio, for example. By setting this content, incident light incident from the outside can be efficiently absorbed by the phosphor material, and radiated light of different wavelengths can be emitted with high conversion efficiency.
なお、本実施の形態においては、第２の被覆材３の支持基板３Ａにおける複数の凹部の形状を、六角錐台形状としており、六角錐台の下底を前記凹部の開口部とする構成としている。そして、ある凹部における開口部の一辺と他の凹部における開口部の一辺とが隣接するよう配置しており、前記複数の凹部を蜂の巣状に隙間無く配置している。この構成により、支持基板３Ａ側から入射した入射光が、蛍光材料１に入射せずに、支持基板３Ａの一部であり前記複数の凹部を分離する分離部３Ａ１を通過することを抑制している。その結果、前記入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減させることができる。 In the present embodiment, the shape of the plurality of recesses in the support substrate 3A of the second covering material 3 is a hexagonal frustum shape, and the bottom of the hexagonal frustum is the opening of the recess. Yes. And it arrange | positions so that the one side of the opening part in a certain recessed part and the one side of the opening part in another recessed part may adjoin, and arrange | positions the said several recessed part in a honeycomb shape without gap. With this configuration, incident light incident from the support substrate 3A side is prevented from entering the fluorescent material 1 and passing through the separation portion 3A1 that is part of the support substrate 3A and separates the plurality of recesses. Yes. As a result, the incident light can be prevented from entering and passing through the cover member 3B without being converted by the fluorescent material 1.
さらに、蛍光材料１を複数の凹部のそれぞれに格納する構成としていることにより、投光構造体が傾いて配置されたり、振動などが発光部材１０に印加されたりするような場合においても、蛍光材料１が発光部材１０の一部の領域に偏って移動することを抑制することができる。 Furthermore, since the fluorescent material 1 is configured to be stored in each of the plurality of recesses, the fluorescent material can be used even when the light projecting structure is inclined and vibration is applied to the light emitting member 10. 1 can be prevented from moving toward a partial region of the light emitting member 10.
なお、前記複数の凹部の形状を、六角錐台形状、または六角錐形状とすることにより、第２の被覆材上方から見た時に前記複数の凹部を蜂の巣状に隙間無く配置することができ、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得ることができる。 In addition, by making the shape of the plurality of recesses a hexagonal frustum shape, or a hexagonal pyramid shape, the plurality of recesses can be arranged in a honeycomb shape without gaps when viewed from above the second covering material, An effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1 can be obtained.
特に、前記複数の凹部の形状は、六角錐形状よりも六角錐台形状とすることが好ましい。六角錐台形状とすることにより、その上底から下底への傾きを変化させることで、第２の被覆材３と第１の被覆材２との体積比率を自由に変えることができる。 In particular, the shape of the plurality of recesses is preferably a hexagonal frustum shape rather than a hexagonal pyramid shape. By adopting the hexagonal frustum shape, the volume ratio between the second covering material 3 and the first covering material 2 can be freely changed by changing the inclination from the upper base to the lower base.
なお、前記複数の凹部の形状を、四角錐台形状、または四角錐形状とした場合においては、ある凹部における開口部の一辺と他の凹部における開口部の一辺とが隣接するよう配置し、第２の被覆材上方から見た時に前記複数の凹部を格子状に隙間無く配置することができ、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得ることができる。ただし、六角錐台形状、または六角錐形状とする方が、衝撃などに対し、より安定的な形状であるため好ましい。 In the case where the shape of the plurality of recesses is a quadrangular pyramid shape or a quadrangular pyramid shape, it is arranged so that one side of the opening in one recess is adjacent to one side of the opening in another recess, When viewed from above the covering material 2, the plurality of recesses can be arranged in a lattice pattern without gaps, and the effect of reducing incident light from entering and passing through the cover member 3 </ b> B without being converted by the fluorescent material 1 is achieved. Can be obtained. However, the hexagonal frustum shape or the hexagonal pyramid shape is preferable because it is a more stable shape against impact and the like.
なお、前記複数の凹部の形状は、四角錐形状よりも四角錐台形状とすることが好ましい。四角錐台形状とすることにより、その上底から下底への傾きを変化させることで、第２の被覆材３と第１の被覆材２との体積比率を自由に変えることができる。 The plurality of recesses preferably have a quadrangular pyramid shape rather than a quadrangular pyramid shape. By adopting a quadrangular pyramid shape, the volume ratio between the second covering material 3 and the first covering material 2 can be freely changed by changing the inclination from the upper base to the lower base.
なお、前記ある凹部と前記他の凹部との幅が極小となる部分が前記凹部の開口部以外の部分であってもよい。即ち、角錐台の上底を前記凹部の開口部とするような構成としても、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得ることができる。ただし、角錐台の下底を前記凹部の開口部とするような構成とすることにより、支持基板３Ａに第１の被覆材２を充填し易くすることができるため好ましい。 Note that a portion where the width between the certain recess and the other recess is minimized may be a portion other than the opening of the recess. That is, even if the top base of the truncated pyramid is used as the opening of the concave portion, it is possible to obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1. . However, it is preferable to configure the lower base of the truncated pyramid to be the opening of the concave portion because the first covering material 2 can be easily filled in the support substrate 3A.
なお、前記凹部の形状は角錐台に限られず、円錐、円錐台としても構わない。ただし、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果をより効率よく得るためには、前記凹部の形状を角錐台とすることがより好ましい。 The shape of the recess is not limited to a truncated pyramid, and may be a cone or a truncated cone. However, in order to more efficiently obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1, it is more preferable that the shape of the concave portion is a truncated pyramid.
なお、前記凹部の形状を角柱状としてもかまわない。ただし、入射光が蛍光材料１で変換されずにカバー部材３Ｂへ入射・通過することを低減する効果を得るためには複数の角柱状の凹部をできるだけ近づけて配置する必要があるため、支持基板３Ａの加工精度の観点からは、前記凹部を角錐台形状とする方が前記凹部の開口部のみを近づける様に形成すれば足りるため好ましい。 The shape of the recess may be a prism shape. However, since it is necessary to arrange a plurality of prismatic concave portions as close as possible in order to obtain an effect of reducing incident light from entering and passing through the cover member 3B without being converted by the fluorescent material 1, the support substrate From the viewpoint of the processing accuracy of 3A, it is preferable that the concave portion has a truncated pyramid shape because it is sufficient to form only the opening of the concave portion.
なお、第１の被覆材２の熱膨張係数が第２の被覆材３の熱膨張係数よりも小さいことが望ましい。この構成により、投光構造体の温度が上昇しても、第１の被覆材２が熱膨張し、第２の被覆材３に圧力が印加されることを抑制することができる。 The thermal expansion coefficient of the first coating material 2 is desirably smaller than the thermal expansion coefficient of the second coating material 3. With this configuration, even when the temperature of the light projecting structure rises, the first covering material 2 can be prevented from thermally expanding and pressure being applied to the second covering material 3.
以下、実施の形態１における投光構造体について図面を参照しながら説明する。 Hereinafter, the light projecting structure according to Embodiment 1 will be described with reference to the drawings.
実施の形態１における投光構造体１００Ａは、図８に示すごとく、凹面状に形成された反射面を有する反射部材１７を有し、図１〜４、７を用いて上述した発光部材１０が前記反射面の焦点位置に配置されている。 As shown in FIG. 8, the light projecting structure 100 </ b> A according to the first embodiment includes a reflecting member 17 having a reflecting surface formed in a concave shape, and the light emitting member 10 described above with reference to FIGS. It is arranged at the focal position of the reflecting surface.
このような構成とすることにより、図１〜４、７において示した蛍光材料１の熱膨張係数と第１の被覆材２の熱膨張係数との違いによって生じる応力が、液体またはゲル状の第１の被覆材２内で分散されるため、蛍光材料１の粒子付近において第１の被覆材２が破壊されるのを抑制することができる。その結果として、耐熱性を向上させた投光構造体１００Ａを実現することができる。 With such a configuration, the stress caused by the difference between the thermal expansion coefficient of the fluorescent material 1 and the thermal expansion coefficient of the first covering material 2 shown in FIGS. Since the first covering material 2 is dispersed in the first covering material 2, it is possible to suppress the destruction of the first covering material 2 in the vicinity of the particles of the fluorescent material 1. As a result, the light projecting structure 100A with improved heat resistance can be realized.
以下、実施の形態１における投光構造体１００Ａの任意の構成を含めたより具体的な構成について説明する。 Hereinafter, a more specific configuration including an arbitrary configuration of the light projecting structure 100A in the first embodiment will be described.
図８に示すごとく、光源としてのレーザ１１をヒートシンク１２上に配置している。図８においてはレーザ１１を３つ設けることにより光出力を担保する構成としているが、その数は３つに限定されない。レーザ１１からの出射光１４はコリメートレンズ１３により平行光となり、ロッドインテグレーターレンズ１５に入射する。ロッドインテグレーターレンズ１５により光強度が均一化された光が発光部材１０の下面側に入射する。発光部材１０の下面側に入射した光は、図１に示した、固体の透過性の材料により形成された第２の被覆材３を透過し、その一部もしくは全部が第１の被覆材２内の蛍光材料１に吸収され、蛍光として放射される。この蛍光が透過性材料からなる第２の被覆材３を透過し、発光部材１０の上面、及び側面から放射される。また蛍光材料１に吸収されなかった光は、凹部の側面等で反射され、第２の被覆材３を透過し、発光部材１０の上面側および側面から放射される。 As shown in FIG. 8, a laser 11 as a light source is disposed on a heat sink 12. In FIG. 8, the configuration is such that the light output is secured by providing three lasers 11, but the number is not limited to three. The emitted light 14 from the laser 11 becomes parallel light by the collimating lens 13 and enters the rod integrator lens 15. The light whose light intensity is made uniform by the rod integrator lens 15 enters the lower surface side of the light emitting member 10. The light incident on the lower surface side of the light emitting member 10 passes through the second covering material 3 formed of a solid transparent material shown in FIG. 1, and a part or all of the light is applied to the first covering material 2. It is absorbed by the fluorescent material 1 and emitted as fluorescence. This fluorescence passes through the second covering material 3 made of a transmissive material, and is emitted from the upper surface and side surfaces of the light emitting member 10. The light that has not been absorbed by the fluorescent material 1 is reflected by the side surfaces of the recesses, passes through the second covering material 3, and is emitted from the upper surface side and side surfaces of the light emitting member 10.
発光部材１０における蛍光材料１からの放射光、及び発光部材１０を透過した透過光は混合され、白色光となり、発光部材１０から全方位に放射される放射光となる。そして放射光は、反射部材１７により平行光となり、カバー透明部材１６を通過し、投光構造体１００Ａの外部に放射される。このときカバー透明部材１６は、投光構造体１００Ａを使用する際に、反射部材１７の反射面や発光部材１０を外部から保護する役割をする。 The emitted light from the fluorescent material 1 in the light emitting member 10 and the transmitted light that has passed through the light emitting member 10 are mixed to become white light, which becomes emitted light emitted from the light emitting member 10 in all directions. The emitted light is converted into parallel light by the reflecting member 17, passes through the cover transparent member 16, and is emitted to the outside of the light projecting structure 100 </ b> A. At this time, the cover transparent member 16 serves to protect the reflecting surface of the reflecting member 17 and the light emitting member 10 from the outside when the light projecting structure 100A is used.
なお、図９に示す投光構造体１００Ｂは、凹面状に形成された反射面を有する反射部材１７を有し、図５、６を用いて上述した発光部材１０が前記反射面の焦点位置に配置されている。 The light projecting structure 100B shown in FIG. 9 includes a reflecting member 17 having a reflecting surface formed in a concave shape, and the light emitting member 10 described above with reference to FIGS. 5 and 6 is located at the focal position of the reflecting surface. Has been placed.
このような構成とすることにより、図５、６において示した蛍光材料１の熱膨張係数と第１の被覆材２の熱膨張係数との違いによって生じる応力が、液体またはゲル状の第１の被覆材２内で分散されるため、蛍光材料１の粒子付近において第１の被覆材２が破壊されるのを抑制することができる。その結果として、耐熱性を向上させた投光構造体１００Ｂを実現することができる。 With such a configuration, the stress generated by the difference between the thermal expansion coefficient of the fluorescent material 1 and the thermal expansion coefficient of the first covering material 2 shown in FIGS. Since it is dispersed in the covering material 2, it is possible to suppress the destruction of the first covering material 2 in the vicinity of the particles of the fluorescent material 1. As a result, the light projecting structure 100B with improved heat resistance can be realized.
以下、実施の形態１における投光構造体１００Ｂの任意の構成を含めたより具体的な構成について説明する。 Hereinafter, a more specific configuration including an arbitrary configuration of the light projecting structure 100B in the first embodiment will be described.
図９に示すごとく、光源としてのレーザ１１をヒートシンク１２上に配置している。図９においてはレーザ１１を３つ設けることにより光出力を担保する構成としているが、その数は３つに限定されない。レーザ１１からの出射光１４はコリメートレンズ１３により平行光となり、凹レンズ２０に入射する。凹レンズ２０により３つのレーザ１１からの出射光１４が１本の光となり、反射鏡２１に入射する。この反射鏡２１に反射された出射光１４が反射部材１７の開口部１７Ａを通過して、前記凹面の焦点位置に配置された発光部材１０の上面側に入射する。発光部材１０に入射した光は、その一部が図５、６に示した蛍光材料１により吸収され、蛍光として放射される。この蛍光が、反射率の高い金属からなる支持基板３Ｃにより反射され、発光部材１０の上面、及び側面から放射される。蛍光材料１に吸収されなかった入射光についても、支持基板３Ｃに反射され、発光部材１０の上面、及び側面から放射される。そして、発光部材１０から全方位に放射される放射光となる。そして放射光は、反射部材１７により平行光となり、カバー透明部材１６を通過し、投光構造体１００Ｂの外部に放射される。このときカバー透明部材１６は、投光構造体１００Ｂを使用する際に、反射部材１７の反射面や発光部材１０を外部から保護する役割をする。 As shown in FIG. 9, a laser 11 as a light source is disposed on a heat sink 12. In FIG. 9, the light output is secured by providing three lasers 11, but the number is not limited to three. The emitted light 14 from the laser 11 becomes parallel light by the collimating lens 13 and enters the concave lens 20. The emitted light 14 from the three lasers 11 becomes one light by the concave lens 20 and enters the reflecting mirror 21. The outgoing light 14 reflected by the reflecting mirror 21 passes through the opening 17A of the reflecting member 17 and enters the upper surface side of the light emitting member 10 disposed at the focal position of the concave surface. A part of the light incident on the light emitting member 10 is absorbed by the fluorescent material 1 shown in FIGS. 5 and 6 and is emitted as fluorescent light. This fluorescence is reflected by the support substrate 3C made of a metal having a high reflectance, and is emitted from the upper surface and the side surface of the light emitting member 10. The incident light that has not been absorbed by the fluorescent material 1 is also reflected by the support substrate 3 </ b> C and is emitted from the upper surface and the side surface of the light emitting member 10. And it becomes the radiated light radiated | emitted from the light emitting member 10 in all directions. The radiated light is converted into parallel light by the reflecting member 17, passes through the cover transparent member 16, and is radiated to the outside of the light projecting structure 100B. At this time, the cover transparent member 16 serves to protect the reflection surface of the reflection member 17 and the light emitting member 10 from the outside when the light projecting structure 100B is used.
以下、実施の形態１における発光部材１０の製造方法について説明する。 Hereinafter, the manufacturing method of the light emitting member 10 in Embodiment 1 is demonstrated.
まず、図１０に示すごとく、ガラス、サファイア、窒化ガリウム、窒化アルミニウム、炭化珪素、シリコンあるいはアルミニウムなどの金属からなる基板３３を準備する。 First, as shown in FIG. 10, a substrate 33 made of a metal such as glass, sapphire, gallium nitride, aluminum nitride, silicon carbide, silicon or aluminum is prepared.
次に、図１１に示すごとく、ドライエッチング加工等により基板３３の上面に複数の凹部を設け、サファイア、ＧａＮなどの透過性材料からなる支持基板３Ａ、またはアルミニウムなどの金属材料からなる支持基板３Ｃを形成する。 Next, as shown in FIG. 11, a plurality of recesses are provided on the upper surface of the substrate 33 by dry etching or the like, and a support substrate 3A made of a transmissive material such as sapphire or GaN, or a support substrate 3C made of a metal material such as aluminum. Form.
その後、図１２に示すごとく、蛍光材料１を内在した第１の被覆材２を前記複数の凹部の上方から塗布する。ここで、第１の被覆材２は、例えば水、アルコール、フロリナートなどの液体、または、例えば、ナノシリカなどがコロイド分散されたゾル、または、例えばシリコーン、シロキサン、シリコーンオイルなどのゲルもしくはゲル状物質などにより構成している。 Thereafter, as shown in FIG. 12, the first covering material 2 containing the fluorescent material 1 is applied from above the plurality of recesses. Here, the first covering material 2 is, for example, a liquid such as water, alcohol, or fluorinate, or a sol in which nano silica or the like is colloidally dispersed, or a gel or a gel-like substance such as silicone, siloxane, or silicone oil. Etc.
次に、図１３に示すごとく、脱泡工程を経て前記複数の凹部の底面にまで第１の被覆材２が密着した状態にする。 Next, as shown in FIG. 13, the first covering material 2 is brought into close contact with the bottom surfaces of the plurality of recesses through a defoaming step.
その後、図１４に示すごとく、カバー部材３Ｂを第１の被覆材２の上方から支持基板３Ａ（３Ｃ）側に押圧し貼り合せを行う。このカバー部材３Ｂはサファイア、ＧａＮなどの透過性の材料により形成しており、カバー部材３Ｂと支持基板３Ａ（３Ｃ）により第２の被覆材３を構成している。上記、カバー部材３Ｂと支持基板３Ａを貼り合せる方法としては、例えば、カバー部材３Ｂと支持基板３Ａの貼り合せる面に不純物をドーピングした層をあらかじめ形成し、押圧するとともに所定の電圧を印加することで容易に実現できる。またカバー部材３Ｂと支持基板３Ａの場合は、支持基板３Ａとしてアルミニウム、シリコンなど導電性基板を用いることでより容易に実現できる。 Thereafter, as shown in FIG. 14, the cover member 3 </ b> B is pressed and bonded to the support substrate 3 </ b> A (3 </ b> C) side from above the first covering material 2. The cover member 3B is made of a transmissive material such as sapphire or GaN, and the cover member 3B and the support substrate 3A (3C) constitute the second covering material 3. As a method of bonding the cover member 3B and the support substrate 3A, for example, a layer doped with impurities is formed in advance on the surface to be bonded of the cover member 3B and the support substrate 3A, and a predetermined voltage is applied while pressing. Can be realized easily. Further, in the case of the cover member 3B and the support substrate 3A, it can be more easily realized by using a conductive substrate such as aluminum or silicon as the support substrate 3A.
このような製造方法により形成された発光部材１０は、蛍光材料１の熱膨張係数と第１の被覆材２の熱膨張係数との違いによって生じる応力が、液体またはゲル状の第１の被覆材２内で分散されるため、蛍光材料１の粒子付近において第１の被覆材２が破壊されるのを抑制することができ、その結果として耐熱性を向上させることができるという利点を有する。 In the light emitting member 10 formed by such a manufacturing method, the stress generated by the difference between the thermal expansion coefficient of the fluorescent material 1 and the thermal expansion coefficient of the first covering material 2 is a liquid or gel-like first covering material. Therefore, the first covering material 2 can be prevented from being broken in the vicinity of the particles of the fluorescent material 1, and as a result, the heat resistance can be improved.
本開示の発光部材は、耐熱性を改善させることができるという効果を有し、前照灯、スポットライト用光源等の各種照明装置などにおいて有用である。 The light emitting member of the present disclosure has an effect that heat resistance can be improved, and is useful in various illumination devices such as a headlamp and a light source for a spotlight.
１ 蛍光材料
２ 第１の被覆材
３ 第２の被覆材
３Ａ 支持基板
３Ｂ カバー部材
３Ｃ 支持基板
１０ 発光部材
１７ 反射部材
１００Ａ 投光構造体
１００Ｂ 投光構造体
DESCRIPTION OF SYMBOLS 1 Fluorescent material 2 1st coating | covering material 3 2nd coating | covering material 3A Support substrate 3B Cover member 3C Support substrate 10 Light emitting member 17 Reflective member 100A Light projection structure 100B Light projection structure
Claims (20)
前記蛍光材料をその内部に含み、前記蛍光の少なくとも一部を透過する液体またはゲル状の第１の被覆材と、
前記第１の被覆材をその内部に含み、前記蛍光の少なくとも一部を透過する固体の第２の被覆材と、
を有する発光部材。 A fluorescent material that absorbs excitation light and generates fluorescence;
A liquid or gel-like first covering material containing the fluorescent material therein and transmitting at least part of the fluorescence; and
A solid second covering material that includes the first covering material therein and transmits at least part of the fluorescence; and
A light emitting member.
その上面に複数の凹部を有する支持基板と、
前記複数の凹部の開口部を閉ざすカバー部材とを有し、
前記第１の被覆材が前記凹部内に設けられた
請求項１に記載の発光部材。 The second covering material has a support substrate having a plurality of recesses on the upper surface thereof;
A cover member that closes the openings of the plurality of recesses,
The light emitting member according to claim 1, wherein the first covering material is provided in the recess.
前記多角錐台の下底が前記凹部の開口部である
請求項２に記載の発光部材。 Among the plurality of recesses, at least two or more are polygonal frustum shapes,
The light emitting member according to claim 2, wherein a lower bottom of the polygonal frustum is an opening of the concave portion.
請求項３に記載の発光部材。 The light emitting member according to claim 3, wherein the polygonal frustum shape is a hexagonal frustum shape.
前記第１の凹部における開口部の一辺が
前記第２の凹部における開口部の一辺と隣接している
請求項４に記載の発光部材。 The plurality of hexagonal frustum-shaped recesses have a first recess and a second recess,
The light emitting member according to claim 4, wherein one side of the opening in the first recess is adjacent to one side of the opening in the second recess.
請求項３に記載の発光部材。 The light emitting member according to claim 3, wherein the polygonal frustum shape is a quadrangular frustum shape.
前記第１の凹部における開口部の一辺が
前記第２の凹部における開口部の一辺と隣接している
請求項４に記載の発光部材。 The plurality of concave portions of the quadrangular pyramid shape have a first concave portion and a second concave portion,
The light emitting member according to claim 4, wherein one side of the opening in the first recess is adjacent to one side of the opening in the second recess.
前記複数の凹部における第１の凹部内に前記第１の蛍光材料が配置され、
前記複数の凹部における第２の凹部内に前記第２の蛍光材料が配置された
請求項２に記載の発光部材。 The fluorescent material has a first fluorescent material and a second fluorescent material,
The first fluorescent material is disposed in a first recess of the plurality of recesses,
The light emitting member according to claim 2, wherein the second fluorescent material is disposed in a second recess of the plurality of recesses.
前記複数の凹部における一つの凹部内に前記第１の蛍光材料と前記第２の蛍光材料の双方が配置された
請求項２に記載の発光部材。 The fluorescent material has a first fluorescent material and a second fluorescent material,
The light emitting member according to claim 2, wherein both the first fluorescent material and the second fluorescent material are disposed in one concave portion of the plurality of concave portions.
請求項１に記載の発光部材。 The light emitting member according to claim 1, wherein a thermal expansion coefficient of the first coating material is smaller than a thermal expansion coefficient of the second coating material.
前記励起光を吸収して蛍光を発生する蛍光材料と、
前記蛍光材料をその内部に含み、前記蛍光の少なくとも一部を透過する液体またはゲル状の第１の被覆材と、
前記第１の被覆材をその内部に含み、前記蛍光の少なくとも一部を透過する固体の第２の被覆材と、
前記第２の被覆材に透過された蛍光を反射する反射面を有する反射部材と、
を備えた投光構造体。 A light source that emits excitation light;
A fluorescent material that absorbs the excitation light and generates fluorescence;
A liquid or gel-like first covering material containing the fluorescent material therein and transmitting at least part of the fluorescence; and
A solid second covering material that includes the first covering material therein and transmits at least part of the fluorescence; and
A reflecting member having a reflecting surface for reflecting the fluorescence transmitted through the second covering material;
Floodlight structure with
その上面に複数の凹部を有する支持基板と、
前記複数の凹部の開口部を閉ざすカバー部材とを有し、
前記第１の被覆材が前記凹部内に設けられた
請求項１１に記載の投光構造体。 The second covering material has a support substrate having a plurality of recesses on the upper surface thereof;
A cover member that closes the openings of the plurality of recesses,
The light projecting structure according to claim 11, wherein the first covering material is provided in the recess.
前記多角錐台の下底が前記凹部の開口部である
請求項１２に記載の投光構造体。 Among the plurality of recesses, at least two or more are polygonal frustum shapes,
The light projecting structure according to claim 12, wherein a lower bottom of the polygonal frustum is an opening of the concave portion.
請求項１３に記載の投光構造体。 The light projecting structure according to claim 13, wherein the polygonal frustum shape is a hexagonal frustum shape.
前記第１の凹部における開口部の一辺が
前記第２の凹部における開口部の一辺と隣接している
請求項１４に記載の投光構造体。 The plurality of hexagonal frustum-shaped recesses have a first recess and a second recess,
The light projecting structure according to claim 14, wherein one side of the opening in the first recess is adjacent to one side of the opening in the second recess.
請求項１３に記載の投光構造体。 The light projecting structure according to claim 13, wherein the polygonal frustum shape is a quadrangular frustum shape.
前記第１の凹部における開口部の一辺が
前記第２の凹部における開口部の一辺と隣接している
請求項１４に記載の投光構造体。 The plurality of concave portions of the quadrangular pyramid shape have a first concave portion and a second concave portion,
The light projecting structure according to claim 14, wherein one side of the opening in the first recess is adjacent to one side of the opening in the second recess.
前記複数の凹部における第１の凹部内に前記第１の蛍光材料が配置され、
前記複数の凹部における第２の凹部内に前記第２の蛍光材料が配置された
請求項１２に記載の投光構造体。 The fluorescent material has a first fluorescent material and a second fluorescent material,
The first fluorescent material is disposed in a first recess of the plurality of recesses,
The light projecting structure according to claim 12, wherein the second fluorescent material is disposed in a second recess of the plurality of recesses.
前記複数の凹部における一つの凹部内に前記第１の蛍光材料と前記第２の蛍光材料の双方が配置された
請求項１２に記載の投光構造体。 The fluorescent material has a first fluorescent material and a second fluorescent material,
The light projecting structure according to claim 12, wherein both the first fluorescent material and the second fluorescent material are disposed in one concave portion of the plurality of concave portions.
請求項１１に記載の投光構造体。 The light projecting structure according to claim 11, wherein a thermal expansion coefficient of the first covering material is smaller than a thermal expansion coefficient of the second covering material.
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| US9991668B2 (en) | 2014-10-15 | 2018-06-05 | Nichia Corporation | Light emitting device |
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| WO2018189998A1 (en) * | 2017-04-14 | 2018-10-18 | ソニーセミコンダクタソリューションズ株式会社 | Fluorescent molded body, solid-state light source and electronic device using same |
| JPWO2018189998A1 (en) * | 2017-04-14 | 2020-05-21 | ソニーセミコンダクタソリューションズ株式会社 | Fluorescent molded body, solid-state light source, and electronic device using the same |
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