JP2015095337A - Lighting device - Google Patents

Lighting device Download PDF

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JP2015095337A
JP2015095337A JP2013233545A JP2013233545A JP2015095337A JP 2015095337 A JP2015095337 A JP 2015095337A JP 2013233545 A JP2013233545 A JP 2013233545A JP 2013233545 A JP2013233545 A JP 2013233545A JP 2015095337 A JP2015095337 A JP 2015095337A
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Japan
Prior art keywords
light
emitting surface
light emitting
condenser
light source
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JP2013233545A
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JP6252746B2 (en
Inventor
有美 羽生田
Yumi Hanyuda
有美 羽生田
剛 遠山
Takeshi Toyama
剛 遠山
治雄 矢倉
Haruo Yakura
治雄 矢倉
直人 徳原
Naoto Tokuhara
直人 徳原
貴之 大野
Takayuki Ono
貴之 大野
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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Priority to JP2013233545A priority Critical patent/JP6252746B2/en
Priority to KR1020140061675A priority patent/KR20150054630A/en
Priority to CN201420516484.0U priority patent/CN204062860U/en
Publication of JP2015095337A publication Critical patent/JP2015095337A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/07—Optical design with hyperbolic curvature

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Microscoopes, Condenser (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of occurrence of irregular luminance.SOLUTION: A lighting device 10 includes: a light source 21; and a condenser 23. The light source 21 includes a flat light-emitting surface 28. The condenser 23 is formed into a cylindrical shape having an incident opening 36 that is provided on one end of the condenser 23 and on which light from the light-emitting surface 28 is incident, and an emission opening 37 that is provided on the other end thereof and from which the light is emitted. The condenser 23 is arranged such that a clearance 44 is present between one end of the condenser 23 and the light-emitting surface 28, and the light-emitting surface 28 is larger in an external size than the incident opening 36 in a view from the emission opening 37.

Description

本発明の実施形態は、集光器を備えた照明装置に関する。   Embodiments described herein relate generally to a lighting device including a condenser.

従来、例えばスタジオや舞台等で使用されるスポットライト等の照明装置では、例えばＣＯＢモジュール等の面状の発光面を有する光源、およびこの光源からの光を集光するために放物線の回転対象形状に形成された集光器等を用いた照明装置がある。   Conventionally, in a lighting device such as a spotlight used in a studio or a stage, for example, a light source having a planar light emitting surface such as a COB module, and a parabolic rotation target shape for condensing light from the light source There is an illuminating device using a concentrator formed in the above.

集光器が金属材料で形成されていたり金属部を有する場合、集光器と発光面との間に空間絶縁距離を確保する必要があるために、集光器と発光面との間には隙間が設けられている。   When the light collector is made of a metal material or has a metal part, it is necessary to secure a spatial insulation distance between the light collector and the light emitting surface. A gap is provided.

特開２０１２−８９３９４号公報JP 2012-89394 A

しかしながら、集光器と発光面との間に隙間があると、その隙間の影響で集光器に縞模様が映し出され、輝度むらが発生する問題がある。   However, if there is a gap between the light collector and the light emitting surface, there is a problem that stripes are projected on the light collector due to the influence of the gap, resulting in uneven brightness.

本発明が解決しようとする課題は、輝度むらが生じるのを低減できる照明装置を提供することである。   The problem to be solved by the present invention is to provide an illumination device that can reduce the occurrence of uneven brightness.

実施形態の照明装置は、光源、および集光器を備える。光源は、面状の発光面を有する。集光器は、一端側に発光面からの光が入射する入射開口を有するとともに他端側に光が出射する出射開口を有する筒状に形成される。集光器は一端側と発光面との間に隙間を介して配置され、出射開口側から見て入射開口よりも発光面の外形の方が大きい。   The illumination device of the embodiment includes a light source and a condenser. The light source has a planar light emitting surface. The concentrator is formed in a cylindrical shape having an entrance opening through which light from the light emitting surface is incident on one end side and an exit opening through which light is emitted on the other end side. The condenser is disposed between the one end side and the light emitting surface with a gap, and the outer shape of the light emitting surface is larger than that of the incident aperture when viewed from the exit aperture side.

本発明によれば、集光器の出射開口側から見て入射開口よりも発光面の外形の方を大きくすることにより、集光器と発光面との間に隙間があっても、輝度むらが発生するのを低減することが期待できる。   According to the present invention, the luminance unevenness is increased even if there is a gap between the light collector and the light emitting surface by making the outer shape of the light emitting surface larger than the incident aperture when viewed from the exit aperture side of the light collector. It can be expected to reduce the occurrence of.

一実施形態を示す照明装置の側面図である。It is a side view of the illuminating device which shows one Embodiment. 同上照明装置の反射体をレンズ側から見た面光源の発光面および反射体で形成される発光面の虚像を示す模式図である。It is a schematic diagram which shows the virtual image of the light emission surface formed by the light emission surface of the surface light source which looked at the reflector of the illumination device same as the above from the lens side, and a reflector. 同上照明装置の反射体の機能の説明図である。It is explanatory drawing of the function of the reflector of a illuminating device same as the above. 同上照明装置の斜視図である。It is a perspective view of an illuminating device same as the above. 同上照明装置の側面図である。It is a side view of an illuminating device same as the above. 同上照明装置の内部構造を示す斜視図である。It is a perspective view which shows the internal structure of an illuminating device same as the above.

以下、一実施形態を、図１ないし図６を参照して説明する。   Hereinafter, an embodiment will be described with reference to FIGS. 1 to 6.

図１、図４および図５において、照明装置10として、例えばスタジオや舞台等で使用されるスポットライトの構成を示す。照明装置10は、光軸ｚを中心とする筒状の筐体11、筐体11内の後部側に配置される光源部12、筐体11内の前部側に配置されるレンズ13、およびレンズ13を光軸方向に移動させて照射角を調整する調整機構（図示せず）等を備えている。   1, 4, and 5, a configuration of a spotlight used as a lighting device 10 in, for example, a studio or a stage is shown. The illumination device 10 includes a cylindrical housing 11 centered on the optical axis z, a light source unit 12 disposed on the rear side in the housing 11, a lens 13 disposed on the front side in the housing 11, and An adjustment mechanism (not shown) that adjusts the irradiation angle by moving the lens 13 in the optical axis direction is provided.

そして、筐体11は、例えば金属製で、前面には光源部12から発せられてレンズ13で集光された所定の照射角の光を投光する開口部16が形成されている。筐体11の後部には、光源部12（後述する放熱器）が配置される突出部17が形成され、この突出部17の上面、下面、背面および両側面のそれぞれに通気口18が形成されている。各通気口18は通気性を有する網等で覆われている。   The casing 11 is made of, for example, metal, and an opening 16 is formed on the front surface for projecting light having a predetermined irradiation angle emitted from the light source unit 12 and collected by the lens 13. At the rear of the housing 11, a protrusion 17 is formed in which a light source part 12 (a radiator to be described later) is disposed. A vent 18 is formed on each of the upper surface, the lower surface, the back surface, and both side surfaces of the protrusion 17. ing. Each vent 18 is covered with a breathable net or the like.

また、図１、図４ないし図６に示すように、光源部12は、光源21、光源21の後部側に配置される放熱器22、光源21とレンズ13との間に配置される集光器23、放熱器22側の前側に配置される遮光板24、および集光器23とレンズ13との間に配置される光拡散手段25を備えている。   As shown in FIGS. 1, 4 to 6, the light source unit 12 includes a light source 21, a radiator 22 disposed on the rear side of the light source 21, and a light collector disposed between the light source 21 and the lens 13. And a light-shielding plate 24 disposed on the front side of the radiator 22 and a light diffusion means 25 disposed between the condenser 23 and the lens 13.

光源21は、例えばヒートスプレッタ等の平板状の基板27、およびこの基板27の前面に複実装された複数の発光素子を備えており、光を出射する平面状の発光面28が形成されている。例えば、光源21は、平板状の基板21の前面に発光素子としての複数のＬＥＤ素子が実装されるとともに、蛍光体を含有した透明な封止樹脂で複数のＬＥＤ素子を一体に覆ったＣＯＢ（Chip On Board）モジュールで構成されている。発光面28は、封止樹脂の前面で構成され、円形の外形状に形成されている。ＬＥＤ素子には青色光を発光する青色ＬＥＤ素子が用いられ、蛍光体には青色光によって励起して黄色光を発光する黄色蛍光体が用いられる。蛍光体には黄色光に加えて橙色光を発光する橙色発光体等を用いてもよい。   The light source 21 includes, for example, a flat substrate 27 such as a heat spreader, and a plurality of light emitting elements mounted on the front surface of the substrate 27, and a planar light emitting surface 28 that emits light is formed. For example, in the light source 21, a plurality of LED elements as light emitting elements are mounted on the front surface of a flat substrate 21, and a plurality of LED elements are integrally covered with a transparent sealing resin containing a phosphor. Chip On Board) module. The light emitting surface 28 is constituted by the front surface of the sealing resin and is formed in a circular outer shape. A blue LED element that emits blue light is used as the LED element, and a yellow phosphor that emits yellow light when excited by blue light is used as the phosphor. As the phosphor, an orange light emitter that emits orange light in addition to yellow light may be used.

また、放熱器22は、光源21の基板27を熱伝導可能に取り付ける例えば銅等の金属製のベース31を備えているとともに、このベース31の後側に配置される例えばアルミニウム等の金属材料で形成された平板状の複数の放熱フィン32を備えている。なお、光源21の充電部と放熱器22側とは電気的に絶縁されている。   The radiator 22 includes a base 31 made of metal such as copper for attaching the substrate 27 of the light source 21 so that heat conduction is possible, and is made of a metal material such as aluminum disposed on the rear side of the base 31. A plurality of flat plate-shaped heat dissipating fins 32 are provided. The charging part of the light source 21 and the radiator 22 side are electrically insulated.

複数の放熱フィン32は、上下方向に立てた状態で、かつ水平方向（光軸ｚ側から見て左右方向）に互いに間隔をあけた状態に並設されている。ベース31には複数本のヒートパイプ33の一端が水平方向に沿って取り付けられ、各ヒートパイプ33の他端が放熱器22の側部を通って複数の放熱フィン32を貫通するとともに複数の放熱フィン32に熱伝導可能に接続されている。   The plurality of heat radiation fins 32 are juxtaposed in a state where they are erected in the vertical direction and spaced apart from each other in the horizontal direction (left and right direction as viewed from the optical axis z side). One end of a plurality of heat pipes 33 is attached to the base 31 along the horizontal direction, and the other end of each heat pipe 33 passes through the side of the radiator 22 and penetrates the plurality of radiation fins 32 and also radiates heat. The fin 32 is connected to be able to conduct heat.

放熱器22は、突出部17内に配置されて筐体11に取り付けられており、筐体11とともにアース電位となる。放熱器22の上面、下面および背面に対応して筐体11の上面、下面および背面の各通気口18が配置されているとともに、放熱器22の両側部を通る複数本のヒートパイプ33の部分に対応して筐体11の両側の通気口18が配置され、放熱器22に対する良好な通気性が得られ、高い放熱性能が確保されている。   The radiator 22 is disposed in the projecting portion 17 and attached to the casing 11, and becomes a ground potential together with the casing 11. Corresponding to the top, bottom and back surfaces of the radiator 22, the vents 18 on the top, bottom and back surfaces of the housing 11 are arranged, and the portions of the plurality of heat pipes 33 which pass through both sides of the radiator 22 Corresponding to the above, vents 18 on both sides of the housing 11 are arranged, good air permeability to the radiator 22 is obtained, and high heat dissipation performance is ensured.

また、集光器23は、例えば金属製で、光軸ｚを中心とする筒状に形成され、光軸方向に開口されている。すなわち、集光器23は、円筒状であり、一端側である後側に発光面28から出射される光が入射する円形の入射開口36が形成され、他端側である前側に入射した光がレンズ13へ向けて出射する円形の出射開口37が形成されている。入射開口36の内径よりも出射開口37の内径の方が大きく、また、図１および図２に示すように、入射開口36の内径よりも発光面28の外径の方が大きく、すなわち、出射開口37側（光軸方向）から見て入射開口36よりも発光面28の外形の方が大きい関係を有している。   The condenser 23 is made of, for example, metal, is formed in a cylindrical shape centered on the optical axis z, and is opened in the optical axis direction. That is, the concentrator 23 has a cylindrical shape, and a circular incident opening 36 into which light emitted from the light emitting surface 28 is incident is formed on the rear side which is one end side, and light which is incident on the front side which is the other end side. Is formed with a circular exit opening 37 through which the light exits toward the lens 13. The inner diameter of the exit opening 37 is larger than the inner diameter of the entrance opening 36, and the outer diameter of the light emitting surface 28 is larger than the inner diameter of the entrance opening 36, as shown in FIGS. The outer shape of the light emitting surface 28 is larger than that of the incident opening 36 when viewed from the opening 37 side (optical axis direction).

集光器23の内面には、光軸ｚを中心として双曲線の回転対象形状の反射面38が形成されている。反射面38の双曲線の焦点39は、発光面28を延長した平面上に位置されている。なお、反射面38の双曲線の焦点39は、発光面28を延長した平面より後側に位置していてもよい。このような反射面38の形状は、レンズ13の焦点を光源21付近に配置した場合に、発光面28からの光がレンズ13に有効に入る形状となっている。   On the inner surface of the condenser 23, a reflecting surface 38 having a hyperbolic shape to be rotated about the optical axis z is formed. The hyperbolic focus 39 of the reflecting surface 38 is located on a plane extending from the light emitting surface 28. The hyperbolic focal point 39 of the reflecting surface 38 may be located behind the plane extending from the light emitting surface 28. The shape of the reflecting surface 38 is such that the light from the light emitting surface 28 enters the lens 13 effectively when the focal point of the lens 13 is disposed in the vicinity of the light source 21.

そして、図２に示すように、集光器23をレンズ13側から見ると、反射面38に発光面28の虚像40が映り込み、発光面28の周囲で発光面28を延長した平面上に発光面28の虚像40が連続して延長しているように見える。さらに、双曲線の反射面38でも発光面28からの光を集光するため、発光面28からの光がレンズ13に有効に入射する。   As shown in FIG. 2, when the condenser 23 is viewed from the lens 13 side, the virtual image 40 of the light emitting surface 28 is reflected on the reflecting surface 38, and the light emitting surface 28 is extended around the light emitting surface 28. The virtual image 40 of the light emitting surface 28 seems to extend continuously. Further, since the light from the light emitting surface 28 is condensed also on the hyperbolic reflecting surface 38, the light from the light emitting surface 28 is effectively incident on the lens 13.

図４ないし図６に示すように、集光器23の前側周囲にはフランジ部41が形成されている。フランジ部41を利用した取付手段42によって、集光器23が放熱器22に対して絶縁状態に取り付けられている。取付手段42には、例えばＰＰＳ（ポリフェニレンサルファイド樹脂）等の耐熱性樹脂材料で円筒状に形成された複数の取付部材43が用いられている。これら取付部材43の一端は放熱器22のベース31の前面にねじ止め固定され、他端にはフランジ部41がねじ止め固定されている。   As shown in FIGS. 4 to 6, a flange portion 41 is formed around the front side of the condenser 23. The collector 23 is attached to the radiator 22 in an insulated state by the attaching means 42 using the flange portion 41. For the attachment means 42, for example, a plurality of attachment members 43 formed in a cylindrical shape with a heat-resistant resin material such as PPS (polyphenylene sulfide resin) are used. One end of these attachment members 43 is fixed to the front surface of the base 31 of the radiator 22 with screws, and the flange portion 41 is fixed to the other end with screws.

集光器23は、発光面28との間に隙間44が形成されるように、取付手段42によって配置されている。   The concentrator 23 is arranged by the attachment means 42 so that a gap 44 is formed between the light collector surface 28 and the light-emitting surface 28.

集光器23と発光面28との間に隙間44を形成する理由は、仮に、アース電位の放熱器22に金属部材で金属製の集光器23が支持された場合、アース電位の集光器23と点灯電力が供給される充電部を有する光源21の発光面28との間に所定の空間絶縁距離を確保するために、隙間44が必要となる。   The reason why the gap 44 is formed between the light collector 23 and the light emitting surface 28 is that if the metal light collector 23 is supported by a metal member on the heat radiator 22 of the ground potential, the light of the ground potential is condensed. In order to ensure a predetermined space insulation distance between the light source 23 having the charging unit 23 and the light source 21 having the charging unit to which the lighting power is supplied, a gap 44 is necessary.

本実施形態では、集光器23を絶縁性を有する取付部材43で支持しているため、集光器23はアース電位となることはない。ただし、光源21には例えば８０Ｖの直流電源が供給されるため、８０Ｖの電圧極側と０Ｖ極側との異極間には電位差があるため、集光器23によってこれら異極間を短絡しないように、集光器23と発光面28との間に所定の空間絶縁距離を確保するための、隙間44が必要となっている。   In the present embodiment, the light collector 23 is supported by the mounting member 43 having an insulating property, and therefore the light collector 23 does not become a ground potential. However, since the light source 21 is supplied with, for example, 80V DC power, there is a potential difference between the opposite poles of the 80V voltage pole side and the 0V pole side, so that the different poles are not short-circuited by the condenser 23. As described above, a gap 44 is required between the light collector 23 and the light emitting surface 28 in order to ensure a predetermined space insulation distance.

なお、上述した出射開口37側から見て入射開口36より発光面28の外形の方が大きい大きさは、反射面38に形成される虚像40に隙間44の影響による縞模様の影が現れない大きさとされている。   Note that when the size of the outer shape of the light emitting surface 28 is larger than that of the incident aperture 36 when viewed from the exit aperture 37 side, the shadow of the stripe pattern due to the effect of the gap 44 does not appear in the virtual image 40 formed on the reflective surface 38. The size is assumed.

また、遮光板24は、光源21の周囲を囲むように略コ字形に形成されており、放熱器22の前側位置で、筐体11内の光が照射される前部側と放熱器22が配置される後部側とを前後に仕切るように配設されている。遮光板24により、集光器23と発光面28との隙間44から筐体11内に出る光、および集光器23から出てもレンズ13に入射しない光が放熱器22を収納した筐体11の突出部17内に侵入するのを防止し、突出部17に形成されている通気口18から光漏れが発生するのが防止される。   Further, the light shielding plate 24 is formed in a substantially U shape so as to surround the light source 21, and the front side where the light in the housing 11 is irradiated and the radiator 22 It arrange | positions so that the rear part side arrange | positioned may be partitioned back and forth. A housing in which the light that enters the housing 11 through the gap 44 between the light collector 23 and the light emitting surface 28 and the light that does not enter the lens 13 even though it exits the light collector 23 is housed in the heat shield 22 by the light shielding plate 24. 11 is prevented from entering into the protrusion 17 and light leakage from the vent hole 18 formed in the protrusion 17 is prevented.

遮光板24は、光源21に近い中央側よりも外側が前方へ向けて傾斜されている。この傾斜された遮光板24の側部位置に筐体11の通気口18が配置されている。   The light shielding plate 24 is inclined outward from the center side near the light source 21 toward the front. A vent 18 of the housing 11 is disposed at a side position of the inclined light shielding plate 24.

また、光拡散手段25は、集光器23の出射開口37より大きく形成され、出射開口37から出射される光を入射し、拡散して透過させる。光拡散手段25には、例えば、拡散板、フライアイレンズ等が用いられる。なお、光拡散手段25は用いることが好ましいが、必須ではない。   The light diffusing means 25 is formed larger than the exit opening 37 of the condenser 23, and enters the light emitted from the exit opening 37, diffuses it, and transmits it. For the light diffusion means 25, for example, a diffusion plate, a fly-eye lens or the like is used. Although the light diffusing means 25 is preferably used, it is not essential.

また、レンズ13は、集光器23から出射される光を入射し、集光して筐体11の開口部16から前方へ投光する。レンズ13は、本実施形態ではフレネルレンズが用いられているが、凸レンズ等でもよい。なお、光拡散手段25を用いている場合には、集光器23から出射されて光拡散手段25を透過した光がレンズ13に入射する。   The lens 13 receives the light emitted from the condenser 23, collects the light, and projects the light forward from the opening 16 of the housing 11. The lens 13 is a Fresnel lens in this embodiment, but may be a convex lens or the like. When the light diffusing unit 25 is used, the light emitted from the condenser 23 and transmitted through the light diffusing unit 25 enters the lens 13.

次に、図３において、集光器23の機能を説明する。   Next, the function of the condenser 23 will be described with reference to FIG.

集光器23の反射面38は、発光面28を延長した平面のＰ，Ｂに焦点を有する双曲線の回転対象形状に形成されている。反射面38の点Ｓが描く双曲線は、Ｐ，Ｓ間の線とＢ，Ｓ間の線との長さの差が一定になっている。そして、発光面28から発せられた光は、Ｐ，Ｂ間の面から発せられたかのように集光器23の出射開口37から出射される。すなわち、図２に示すように、集光器23をレンズ13側から見ると、反射面38に発光面28の虚像40が映り込み、発光面28の周囲で発光面28を延長した平面上に発光面28の虚像40が連続して延長しているように形成される。   The reflecting surface 38 of the condenser 23 is formed into a hyperbolic rotation target shape having a focal point at P and B on a plane obtained by extending the light emitting surface 28. The hyperbola drawn by the point S on the reflecting surface 38 has a constant length difference between the line between P and S and the line between B and S. The light emitted from the light emitting surface 28 is emitted from the emission opening 37 of the condenser 23 as if emitted from the surface between P and B. That is, as shown in FIG. 2, when the condenser 23 is viewed from the lens 13 side, the virtual image 40 of the light emitting surface 28 is reflected on the reflecting surface 38, and the light emitting surface 28 is extended around the light emitting surface 28. The virtual image 40 of the light emitting surface 28 is formed so as to extend continuously.

また、集光器23と発光面28との間には、金属製の集光器23と充電部を有する発光面28との間に所定の空間絶縁距離を確保するための隙間44がある。ここで、仮に、集光器23の入射開口36の内径が発光面28の外径と同じまたは小さかったとした場合、反射面38には隙間44を通じて非発光部が映り込む領域Ａが生じ、光軸方向から見た場合に領域Ａが虚像40に影となって現れて縞模様が生じているように見え、輝度むらが発生する。   In addition, a gap 44 is provided between the light collector 23 and the light emitting surface 28 to ensure a predetermined spatial insulation distance between the metal light collector 23 and the light emitting surface 28 having the charging unit. Here, if the inner diameter of the incident aperture 36 of the condenser 23 is the same as or smaller than the outer diameter of the light emitting surface 28, a region A in which the non-light emitting portion is reflected through the gap 44 occurs on the reflecting surface 38. When viewed from the axial direction, the region A appears as a shadow in the virtual image 40 and appears to be a striped pattern, resulting in uneven brightness.

本実施形態では、入射開口36の内径よりも発光面28の外径の方を大きくしているため、反射面38の領域Ａには隙間44を通じて発光面28が映り込むため、光軸方向から見た場合でも領域Ａが虚像40に影となって現れることがなく、縞模様は見えず、輝度むらの発生を防止できる。   In the present embodiment, since the outer diameter of the light emitting surface 28 is larger than the inner diameter of the incident aperture 36, the light emitting surface 28 is reflected in the region A of the reflecting surface 38 through the gap 44. Even when viewed, the region A does not appear as a shadow in the virtual image 40, the striped pattern is not visible, and the occurrence of uneven brightness can be prevented.

このように、本実施形態の照明装置10では、集光器23の出射開口37側から見て入射開口36よりも発光面28の外形の方を大きくすることにより、集光器23と発光面28との間に隙間44があっても、輝度むらが発生するのを低減することができる。   As described above, in the illumination device 10 of the present embodiment, the outer shape of the light emitting surface 28 is made larger than the incident opening 36 when viewed from the exit opening 37 side of the concentrator 23, whereby the concentrator 23 and the light emitting surface. Even if there is a gap 44 between the light source 28 and the light source 28, the occurrence of uneven brightness can be reduced.

出射開口37側から見て発光面28の周囲に発光面28の虚像40を形成する反射面38を有する集光器23により、照射光の照射角を小さくしても、光源21の光をレンズ13が有効に取り込むことができ、小形で、光出力効率がよい照明装置10を提供できる。   Even if the irradiation angle of the irradiation light is reduced by the condenser 23 having the reflecting surface 38 that forms the virtual image 40 of the light emitting surface 28 around the light emitting surface 28 when viewed from the exit opening 37 side, the light of the light source 21 is lensed. Thus, it is possible to provide a lighting apparatus 10 that can be effectively incorporated, is small, and has high light output efficiency.

反射面38は、双曲線の回転対象形状に形成されているため、発光面28の周囲に発光面28の虚像40を形成する集光器23を容易に形成できる。この反射面38の形状は、照射光の照射角を小さくするためにレンズ13の焦点を光源21付近に配置した場合に、発光面28からの光がレンズ13に有効に入る形状となり、光出力効率を向上できる。しかも、反射面38によって発光面28からの光を集光できるため、レンズ13の焦点を光源21付近に配置して照射角を小さくすることが可能となり、光源21とレンズ13との距離を小さくでき、照明装置10を小形化できる。   Since the reflecting surface 38 is formed in a hyperbolic rotation target shape, the condenser 23 that forms the virtual image 40 of the light emitting surface 28 around the light emitting surface 28 can be easily formed. The shape of the reflecting surface 38 is such that when the focal point of the lens 13 is arranged near the light source 21 in order to reduce the irradiation angle of the irradiation light, the light from the light emitting surface 28 enters the lens 13 effectively, and the light output Efficiency can be improved. Moreover, since the light from the light emitting surface 28 can be collected by the reflecting surface 38, the focal point of the lens 13 can be arranged near the light source 21 to reduce the irradiation angle, and the distance between the light source 21 and the lens 13 can be reduced. The lighting device 10 can be miniaturized.

反射面38の双曲線の焦点39が発光面28を延長した平面上に位置するため、レンズ13の焦点を光源21付近に配置して照射角を小さくした際でも、発光面28からの光をレンズ13に有効に取り込むことができる。   Since the hyperbolic focus 39 of the reflecting surface 38 is located on a plane extending from the light emitting surface 28, the light from the light emitting surface 28 is lensed even when the focal point of the lens 13 is arranged near the light source 21 and the irradiation angle is reduced. 13 can be imported effectively.

また、取付手段42の絶縁性を有する取付部材43によって集光器23を放熱器22に対して絶縁状態に取り付けることにより、アース電位となる場合の集光器23と充電部を有する光源21の発光面28との間の空間絶縁距離を考慮しなくてもよく、光源21の異極間の短絡防止のみを考慮すればよいため、隙間44の寸法を小さくすることが可能となる。それに伴って、発光面28を小さくすることができ、発光面28の光出射量に対する集光器23に入射する光量の割合が増加し、光取出効率を向上させることができる。   Further, by attaching the condenser 23 in an insulated state to the radiator 22 by the attachment member 43 having the insulating property of the attachment means 42, the condenser 23 and the light source 21 having the charging portion when the ground potential is obtained. It is not necessary to consider the space insulation distance between the light emitting surface 28 and only the prevention of short circuit between the different polarities of the light source 21 need to be considered, so that the size of the gap 44 can be reduced. Along with this, the light emitting surface 28 can be reduced, the ratio of the amount of light incident on the condenser 23 to the light emission amount of the light emitting surface 28 is increased, and the light extraction efficiency can be improved.

なお、取付部材43を金属製とし、集光器23を金属材料に代えて絶縁材料で形成してもよい。この場合、集光器23の反射面38の領域には金属反射膜を蒸着することで高い反射率を確保できる。また、集光器23のフランジ部41には、取付部材43にねじ止めする部分の周辺領域に、金属反射膜を形成しないことにより、取付部材43に金属材料を用いていても、金属反射膜と放熱器22側との絶縁性を確保できる。   The attachment member 43 may be made of metal, and the condenser 23 may be formed of an insulating material instead of a metal material. In this case, a high reflectance can be secured by depositing a metal reflection film in the region of the reflection surface 38 of the condenser 23. Further, the metal reflecting film is not formed on the flange portion 41 of the condenser 23 in the peripheral region of the portion screwed to the mounting member 43, so that the metal reflecting film can be used even if a metal material is used for the mounting member 43. And insulation from the radiator 22 side can be secured.

また、照明装置10の点灯時、光源21で発生する熱は、ベース31から複数本のヒートパイプ33を経て複数の放熱フィン32に伝わる。放熱器22は、筐体11の突出部17内に配置されていて、放熱器22の上面、下面および背面に対応して筐体11の上面、下面および背面の各通気口18が配置されているとともに、放熱器22の両側部を通る複数本のヒートパイプ33の部分に対応して筐体11の両側の通気口18が配置され、放熱器22の放熱フィン32に対する良好な通気性が得られ、高い放熱性能がえられる。   Further, when the lighting device 10 is turned on, heat generated by the light source 21 is transmitted from the base 31 to the plurality of heat radiation fins 32 via the plurality of heat pipes 33. The radiator 22 is disposed in the protruding portion 17 of the casing 11, and the upper, lower, and rear vents 18 of the casing 11 are disposed corresponding to the upper, lower, and rear surfaces of the radiator 22. In addition, vents 18 on both sides of the housing 11 are arranged corresponding to the portions of the multiple heat pipes 33 that pass through both sides of the radiator 22, and good ventilation to the radiator fins 32 of the radiator 22 is obtained. High heat dissipation performance.

しかも、照明装置10の投光方向が上向きで、かつ、レンズ13が光源21に近いフラッド状態の場合、放熱器22からの熱が筐体11内を上方に流れようとするが、レンズ13で蓋をしてしまっている状態となるため、筐体11内で熱がこもり、放熱効率が低下するおそれがある。本実施形態では、遮光板24の外側が前方へ向けて傾斜されているとともに、この傾斜された遮光板24の側部位置に筐体11の通気口18が配置されているため、筐体11内を上方に流れる放熱器22からの熱が遮光板24および通気口18を通じて筐体11の外に流れやすくなり、放熱効率を向上できる。   In addition, when the light projecting direction of the lighting device 10 is upward and the lens 13 is in a flood state close to the light source 21, the heat from the radiator 22 tends to flow upward in the housing 11, but the lens 13 Since the lid is closed, heat is trapped in the housing 11 and the heat dissipation efficiency may be reduced. In the present embodiment, the outside of the light shielding plate 24 is inclined forward, and the vent hole 18 of the housing 11 is disposed at a side portion of the inclined light shielding plate 24. Heat from the radiator 22 flowing upward in the interior can easily flow out of the casing 11 through the light shielding plate 24 and the vent hole 18, and the heat radiation efficiency can be improved.

なお、集光器23と発光面28との隙間44から筐体11内に出る光、および集光器23から出てもレンズ13に入射しない光等の筐体11内の光を有効に利用してもよい。例えば、移動機構によって移動するレンズの位置を表示するスケールに筐体11内の光を直接または導光部材等を用いて間接的に導き、周囲が暗い状況でも視認しやすくすることができる。この場合、スケールに対して常に光を導くのではなく、例えば遮光板などでスケールの点灯、消灯が選択できることが好ましい。また、スケールに限らず、他にも筐体11内の光を有効に利用してもよい。   In addition, the light that enters the housing 11 through the gap 44 between the light collector 23 and the light emitting surface 28 and the light in the housing 11 that does not enter the lens 13 even though it exits the light collector 23 are effectively used. May be. For example, the light in the housing 11 can be guided directly or indirectly using a light guide member or the like to a scale that displays the position of the lens that is moved by the moving mechanism, so that it can be easily viewed even in a dark environment. In this case, it is preferable not to always guide light to the scale but to select whether the scale is turned on or off by using a light shielding plate, for example. In addition to the scale, the light in the housing 11 may be used effectively.

また、照明装置は、スポットライトに限らず、光源21と集光器23を備える器具構造であれば、どのような照明装置にも適用できる。   In addition, the lighting device is not limited to a spotlight, and can be applied to any lighting device as long as it has an instrument structure including a light source 21 and a condenser 23.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 照明装置
21 光源
22 放熱器
23 集光器
28 発光面
36 入射開口
37 出射開口
38 反射面
39 焦点
40 虚像
42 取付手段
44 隙間 10 Lighting equipment
21 Light source
22 radiator
23 Concentrator
28 Light emitting surface
36 Entrance aperture
37 Outgoing aperture
38 Reflective surface
39 Focus
40 virtual image
42 Mounting method
44 Clearance

Claims (6)

面状の発光面を有する光源と；
一端側に前記発光面からの光が入射する入射開口を有するとともに他端側に光が出射する出射開口を有する筒状に形成され、前記一端側と前記発光面との間に隙間を介して配置され、前記出射開口側から見て前記入射開口よりも前記発光面の外形の方が大きい集光器と；
を具備することを特徴とする照明装置。 A light source having a planar light emitting surface;
It is formed in a cylindrical shape having an entrance opening through which light from the light emitting surface is incident on one end side and an exit opening through which light is emitted on the other end side, with a gap between the one end side and the light emitting surface. A collector disposed and having a larger outer shape of the light emitting surface than the entrance aperture when viewed from the exit aperture side;
An illumination device comprising: 前記集光器は、前記出射開口側から見て前記発光面の周囲に前記発光面の虚像を形成する反射面を有している
ことを特徴とする請求項１記載の照明装置。 The illuminating device according to claim 1, wherein the condenser has a reflecting surface that forms a virtual image of the light emitting surface around the light emitting surface when viewed from the exit aperture side. 前記発光面の外形の大きさは、前記出射開口側から見て前記反射面に形成される虚像に前記隙間による影が現れない大きさである
ことを特徴とする請求項２記載の照明装置。 The illumination device according to claim 2, wherein the size of the outer shape of the light emitting surface is such that a shadow due to the gap does not appear in a virtual image formed on the reflecting surface when viewed from the exit aperture side. 前記反射面は、双曲線の回転対象形状に形成されている
ことを特徴とする請求項２または３記載の照明装置。 The lighting device according to claim 2, wherein the reflection surface is formed in a hyperbolic rotation target shape. 前記反射面の双曲線の焦点が前記発光面を延長した平面上に位置する
ことを特徴とする請求項２ないし４いずれか一記載の照明装置。 The illuminating device according to any one of claims 2 to 4, wherein a focal point of a hyperbola of the reflecting surface is located on a plane extending from the light emitting surface. 前記光源を熱的に接続された状態に取り付ける金属製の放熱器と；
前記集光器を前記放熱器に対して絶縁状態に取り付ける取付手段と；
を具備していることを特徴とする請求項１ないし５いずれか一記載の照明装置。 A metal radiator that attaches the light source in a thermally connected state;
Mounting means for attaching the condenser to the radiator in an insulated state;
The lighting device according to any one of claims 1 to 5, further comprising:
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JP2018084520A (en) * 2016-11-24 2018-05-31 株式会社アイテックシステム Light source device
JP2019179637A (en) * 2018-03-30 2019-10-17 東芝ライテック株式会社 Lighting fixture
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