JP2008300203A - Luminaire - Google Patents

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JP2008300203A
JP2008300203A JP2007145208A JP2007145208A JP2008300203A JP 2008300203 A JP2008300203 A JP 2008300203A JP 2007145208 A JP2007145208 A JP 2007145208A JP 2007145208 A JP2007145208 A JP 2007145208A JP 2008300203 A JP2008300203 A JP 2008300203A
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light emitting
semiconductor light
light
emitting element
globe
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Kozo Ogawa
光三 小川
Erika Takenaka
絵里果 竹中
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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<P>PROBLEM TO BE SOLVED: To provide a luminaire capable of improving apparatus efficiency by reducing luminance unevenness and advantageous in cost by making components common. <P>SOLUTION: The luminaire includes a luminaire body 10; semiconductor light-emitting elements 21 arranged at the outer fringes 14, 15 of the luminaire body; lens bodies 30 which are arranged opposed to light emitting direction of the semiconductor light-emitting elements and control mainly in parallel direction light of the semiconductor light-emitting elements; reflectors 40 which are opposed to the semiconductor light-emitting elements and are inclined toward nearly the center of the luminaire body; and a globe 50 which covers the semiconductor light-emitting elements and the reflectors and of which transmissivity becomes high as it goes from the outer fringe to the center. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、発光ダイオード等の半導体発光素子を光源としたシーリングライト等の照明器具に関する。    The present invention relates to a lighting fixture such as a ceiling light using a semiconductor light emitting element such as a light emitting diode as a light source.

従来、この種の照明器具として、住宅等の天井面に設置された引掛シーリングに着脱可能に装着される器具本体と、器具本体の下面側に配設される環形蛍光ランプと、環形蛍光ランプを覆い器具本体の下面に着脱可能に取り付けられるグローブを備えたシーリングライトが知られている(例えば、特許文献1参照)。   Conventionally, as this type of lighting fixture, there are an appliance main body that is detachably attached to a hook ceiling installed on a ceiling surface of a house, an annular fluorescent lamp disposed on the lower surface side of the appliance main body, and an annular fluorescent lamp. A ceiling light provided with a glove that is detachably attached to the lower surface of the cover device main body is known (for example, see Patent Document 1).

また近年、半導体発光素子、例えば、発光ダイオードの発光効率の向上により、一般照明用の光源として発光ダイオードを採用する照明器具が商品化され、この種の一般住宅用のシーリングライト等の照明器具においても、光源の一部、例えば、常夜灯の光源を発光ダイオードで構成したものが知られている(例えば、特許文献2参照)。さらに、特許文献3に示されるように、ハウジング内に長尺な光源と長尺な凸レンズ、乱反射層と空気層、さらにハウジングの出射面に光拡散層を備えた中空サイドライト方式の面照明装置が知られ、主に液晶バックライトや看板灯に用いられている。
特開2006−128147号公報 特開2003−242808号公報 特許第2657472号公報
In recent years, due to the improvement of the light emission efficiency of semiconductor light emitting devices, for example, light emitting diodes, lighting fixtures that employ light emitting diodes as light sources for general lighting have been commercialized. Also, a part of a light source, for example, a light source of an all-night light source is known (for example, see Patent Document 2). Furthermore, as shown in Patent Document 3, a hollow sidelight type surface illumination device provided with a long light source and a long convex lens in the housing, an irregular reflection layer and an air layer, and a light diffusion layer on the exit surface of the housing Is known, and is mainly used for LCD backlights and billboard lights.
JP 2006-128147 A Japanese Patent Laid-Open No. 2003-242808 Japanese Patent No. 2657472

一方、特許文献1および2に示されるような環形蛍光ランプを光源とするシーリングライトの場合には、住宅用としてやわらかい光が好まれる。このために発光面となるグローブの輝度ムラ、特に環形蛍光ランプに伴うリング状の明るいイメージおよび中心部分に生じる暗部を抑えることから、グローブに光の拡散性が高くて透過率の低い材料を使用する、その結果、一般的に器具効率(器具光束/ランプ光束)は50%程度で低くなっている。このため、光源として発光ダイオードをそのまま使用した場合、発光面に対して発光ダイオードを万遍なく配置させても、発光ダイオード自体の輝度が高いために、グローブにイメージが発生して輝度ムラが生じ、やはりグローブに光り拡散性が高くて透過率の低い材料を使用せざるを得ない。   On the other hand, in the case of a ceiling light using an annular fluorescent lamp as a light source as shown in Patent Documents 1 and 2, soft light is preferred for residential use. For this reason, the brightness unevenness of the globe that becomes the light emitting surface, especially the ring-shaped bright image associated with the ring-shaped fluorescent lamp and the dark part that occurs in the central part, are suppressed, so the globe uses a material with high light diffusibility and low transmittance. As a result, the instrument efficiency (apparatus luminous flux / lamp luminous flux) is generally as low as about 50%. For this reason, when a light emitting diode is used as a light source as it is, even if the light emitting diodes are uniformly arranged on the light emitting surface, the luminance of the light emitting diode itself is high, so that an image is generated on the globe and uneven brightness occurs. After all, it is necessary to use a material that has high light diffusibility and low transmittance for the globe.

また、特許文献3に示されるような、中空サイドライト方式にした場合、比較的容易に表示面の輝度の均斉度を高めることが可能となるが、住宅用のシーリングライトはバックライトや看板灯とは根本的に構造が異なりハウジング構造になっておらず、剥き出しの反射面に光源を取り付けて、全体を曲面形状のグローブで覆っている構造になっている。このため、シーリングライトの場合には、中空サイドライト方式のように光源部分をハウジングで隠すことができず、特に光源部付近に明暗の輝度ムラが生じやすくなり、グローブに光り拡散性が高くて透過率の低い材料を使用せざるを得なくなり器具効率が低下してしまう。   In addition, when the hollow sidelight system as shown in Patent Document 3 is used, it is possible to relatively easily increase the luminance uniformity of the display surface. However, the ceiling light for a house is a backlight or a signboard lamp. The structure is fundamentally different from that of the housing and is not a housing structure. The light source is attached to the bare reflecting surface and the entire surface is covered with a curved glove. For this reason, in the case of a ceiling light, the light source part cannot be hidden by the housing as in the case of the hollow sidelight system, and brightness unevenness tends to occur particularly near the light source part, and the glove has high light diffusibility. A material having low transmittance must be used, and the efficiency of the instrument is reduced.

また、中空サイドライト方式の反射面(特許文献3の乱反射層)は、出射面の輝度均斉度を高めるために、その形状や反射特性が設計されているが、出射部の形状が変わった場合には、それに応じた反射面の設計変更も必要となる。一方、住宅用シーリングライトの場合、部屋の雰囲気に合わせた数多くのグローブ形状の機種、ラインナップがあり、中空サイドライト方式をシーリングライトにそのまま採用すると、それぞれの機種ごとに異なる反射面が必要となり、開発コスト、および部品コスト等が高騰する問題がある。   In addition, the shape and reflection characteristics of the reflective surface of the hollow sidelight system (diffuse reflection layer of Patent Document 3) are designed to increase the luminance uniformity of the emission surface, but the shape of the emission part changes. Therefore, it is necessary to change the design of the reflecting surface accordingly. On the other hand, in the case of residential ceiling lights, there are a number of glove-shaped models and lineups that match the atmosphere of the room, and adopting the hollow sidelight method as it is in the ceiling light requires a different reflective surface for each model, There is a problem that the development cost and the part cost are soaring.

このため、住宅用シーリングライト等の照明器具の光源を発光ダイオード等の半導体発光素子にする場合には、発光面であるグローブの輝度ムラを低減して器具効率を向上させると共に、機種ごとの反射面の設計変更を不用にしてコスト的に問題の生じない照明器具を如何に実現するかが重要な課題となっている。   For this reason, when the light source of a lighting fixture such as a residential ceiling light is used as a semiconductor light emitting device such as a light emitting diode, the luminance unevenness of the globe, which is the light emitting surface, is reduced, and the efficiency of the fixture is improved. An important issue is how to realize a lighting fixture that does not require a change in the design of the surface and causes no problem in terms of cost.

本発明は、上記課題に鑑みてなされたもので、輝度ムラを低減して器具効率を向上させることができ、かつ部品を共通化してコスト的にも有利な照明器具を提供しようとするものである。   The present invention has been made in view of the above problems, and is intended to provide a lighting apparatus that can improve brightness by reducing luminance unevenness and that is advantageous in terms of cost by sharing parts. is there.

請求項1に記載の照明器具の発明は、器具本体と;器具本体の外縁部に配設される半導体発光素子と;半導体発光素子の光出射方向に対向して配置され、半導体発光素子の光を主として平行方向に制御するレンズ体と;半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と;半導体発光素子および反射体を覆い外縁部から中央部にいくに従い透過率が高くなるようにしたグローブと;を具備することを特徴とする。   The invention of the lighting fixture according to claim 1 includes: a fixture main body; a semiconductor light emitting element disposed on an outer edge portion of the fixture main body; and arranged to face the light emission direction of the semiconductor light emitting element. A lens body that controls the light source mainly in a parallel direction; a reflector that faces the semiconductor light-emitting element and is inclined toward a substantially central portion of the fixture body; covers the semiconductor light-emitting element and the reflector, and transmits as it goes from the outer edge portion to the central portion. And a glove having a high rate.

本発明により、半導体発光素子の光出射方向に対向して配置され、半導体発光素子の光を主として平行方向に制御するレンズ体と、半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と、半導体発光素子および反射体を覆い外縁部から中央部にいくに従い透過率が高くなるようにしたグローブにより、輝度ムラ対策の必要な部分のみグローブの拡散性を上げ、必要のない部分の透過率を上げることができる。また、反射体の形状や反射特性を、典型的なグローブ形状に対して均斉度が得られるように設計し、グローブ形状を変更した機種に対しては、グローブの透過率を制御して輝度ムラを低減することが可能となり、反射体を共通化することができる。   According to the present invention, a lens body that is disposed facing the light emitting direction of the semiconductor light emitting element and controls the light of the semiconductor light emitting element mainly in a parallel direction, and is inclined toward the substantially central portion of the fixture body facing the semiconductor light emitting element. And a glove that covers the semiconductor light emitting element and the reflector so that the transmittance increases as it goes from the outer edge part to the center part. It is possible to increase the transmittance of the part that is not present. In addition, the reflector shape and reflection characteristics are designed so that the degree of uniformity is obtained with respect to a typical globe shape. Can be reduced, and a reflector can be used in common.

本発明において、照明器具は、住宅用のシーリングライト等が好適であるが、住宅用に限らず、オフィス等施設・業務用の照明器具であってもよい。形状は円形、楕円形等の丸形、正方形や長方形等の角形、さらには6角形や8角形等の多角形状をなしていてもよく、特定の形状には限定されない。   In the present invention, the lighting fixture is preferably a ceiling light for a house, but is not limited to a house, and may be a lighting fixture for a facility such as an office or a business. The shape may be a round shape such as a circle or an ellipse, a square shape such as a square or a rectangle, or a polygon such as a hexagon or an octagon, and is not limited to a specific shape.

器具本体は、鉄板等の金属に白色塗装を施したものや白色の合成樹脂で円盤状のシャーシーとして構成され、中央部には天井等の器具取付面に設置された引掛シーリングに着脱可能に設置されるアダプタや、光源を点灯するための点灯装置を有するものが許容される。また形状は照明器具の形状に合わせた形状をなしていても、照明器具の形状とは別の形状をなしていてもよい。   The instrument body is made of a metal plate such as an iron plate with a white coating or a white synthetic resin as a disk-shaped chassis, and is detachably installed in the center on a hook ceiling installed on the instrument mounting surface such as the ceiling Or an adapter having a lighting device for lighting the light source is allowed. Moreover, even if the shape has comprised the shape according to the shape of the lighting fixture, the shape different from the shape of a lighting fixture may be made.

半導体発光素子は、発光ダイオードや半導体レーザーなど、半導体を発光源とした発光素子が許容される。また半導体発光素子は、長尺な直線または曲線等をなす発光モジュールとして構成され、必要な個数が選択されて器具本体の外縁部に配設されることが好ましいが、長尺でなく丸または角形の点状光源をなすように構成しても、またモジュールの形態にすることなく発光素子を単品で直接組み込んで構成する等、その手段は特に限定されない。器具の外縁部の全周囲に配設しても、例えば、角形をなす照明器具において、対向する辺にのみ配設するようにしてもよい。   As the semiconductor light emitting element, a light emitting element using a semiconductor as a light source, such as a light emitting diode or a semiconductor laser, is allowed. Further, the semiconductor light emitting element is configured as a light emitting module having a long straight line or a curved line, etc., and it is preferable that a necessary number is selected and disposed on the outer edge portion of the instrument body. The means is not particularly limited, for example, by constituting the light source in the form of a single light-emitting element directly without forming a module. Even if it arrange | positions to the perimeter of the outer edge part of an instrument, for example, you may make it arrange | position only in the edge | side which opposes in the lighting fixture which makes a square shape.

レンズ体は、半導体発光素子の光出射方向に対向して配置され、半導体発光素子の光を主として平行方向に制御して広がりを持って出射させる長尺な凸レンズ等のレンズ体が好ましい。また、発光モジュールにレンズ体が一体に組み込まれていてもよい。さらに、レンズ体は、例えば、焦点を出た光が無収差の平行光となってレンズを出るコリメータレンズが好適であるが、これには限定されず、半導体発光素子からの光を平行光にして出射させる機能を有する全てのレンズ体が許容される。   The lens body is preferably a lens body such as a long convex lens that is disposed so as to face the light emitting direction of the semiconductor light emitting element and emits the light of the semiconductor light emitting element with a spread by controlling mainly in the parallel direction. Moreover, the lens body may be integrated into the light emitting module. Further, the lens body is preferably a collimator lens that exits the lens, for example, when the focused light becomes non-aberration parallel light, but is not limited to this, and the light from the semiconductor light emitting element is converted into parallel light. All lens bodies having a function of emitting light are allowed.

反射体は、鉄板等の金属に白色塗装を施したものや白色の合成樹脂で構成されもの、若しくはアルミニウムやステンレス等の金属を鏡面加工したものなどが許容され、両端部を光源に対向し、中間部分から器具本体の略中央部に向かって傾斜させた形状をなしている。傾斜部分は連続的に徐々に傾斜させたものでも、階段状など不連続に傾斜させたものであってもよい。   The reflector is allowed to be a metal such as an iron plate or a white synthetic resin, or a mirror-finished metal such as aluminum or stainless steel, with both ends facing the light source, It has a shape that is inclined from the middle part toward the substantially central part of the instrument body. The inclined portion may be continuously inclined gradually or may be discontinuously inclined such as stepped.

グローブは、光源および反射体を覆い、透光性を有する乳白色の半透明な合成樹脂、または強化ガラス等で構成されたものが許容される。グローブは、外縁部から中央部にいくに従い透過率が高くなるように構成するが、その手段は、例えば、その肉厚が外縁部から中央部にいくに従い薄くなるようにして、外縁部から中央部にいくに従い透過率が高くなるようにしても、内面にスクリーン印刷によるグラデーションを形成して透過率を変化させても、さらには拡散材の配合を変化させることによって形成しても、さらに凹凸部等による拡散部の密度を変化させて形成するようにしてもよい。色は乳白色に限定されず、用途、雰囲気等にあわせた各種の色が許容される。形状は、丸形、角形、多角形等に構成して各種形状の照明器具を構成することが好ましい。   The globe may be made of a milky white translucent synthetic resin or tempered glass that covers the light source and the reflector and has translucency. The glove is configured so that the transmittance increases as it goes from the outer edge to the center. For example, the glove can be thinned from the outer edge to the center so that the thickness decreases from the outer edge to the center. Even if the transmittance increases as it goes to the part, even if the transmittance is changed by forming a gradation by screen printing on the inner surface, or even if it is formed by changing the composition of the diffusing material, the unevenness is further increased. It may be formed by changing the density of the diffusion part by the part or the like. The color is not limited to milky white, and various colors according to use, atmosphere, etc. are allowed. It is preferable that the lighting fixtures of various shapes are configured by forming the shape into a round shape, a square shape, a polygonal shape, or the like.

請求項2に記載の照明器具の発明は、器具本体と;器具本体の外縁部に配設される半導体発光素子と;半導体発光素子の光出射方向に対向して配置される長尺なコリメータレンズと;半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と;半導体発光素子および反射体を覆うグローブと;を具備することを特徴とする。   The invention of the lighting fixture according to claim 2 includes: a fixture main body; a semiconductor light emitting element disposed at an outer edge portion of the fixture main body; and a long collimator lens disposed to face the light emission direction of the semiconductor light emitting element. And a reflector that faces the semiconductor light emitting element and is inclined toward a substantially central portion of the instrument body; and a globe that covers the semiconductor light emitting element and the reflector.

請求項3に記載の発明は、請求項2記載の照明器具において、前記コリメータレンズは、平滑な入射面と;入射面の中心に第一焦点を有する断面略楕円形状をなす出射面と;を具備することを特徴とする。   According to a third aspect of the present invention, in the luminaire according to the second aspect, the collimator lens includes a smooth incident surface; and an exit surface having a substantially elliptical cross section having a first focal point at the center of the incident surface. It is characterized by comprising.

請求項4に記載の発明は、請求項2または3記載の照明器具において、前記半導体発光素子は、その発光中心がコリメータレンズの第一焦点よりグローブ側に位置して配設されることを特徴とする。   According to a fourth aspect of the present invention, in the luminaire according to the second or third aspect, the semiconductor light emitting element is disposed such that the light emission center thereof is located on the globe side with respect to the first focal point of the collimator lens. And

請求項5記載の発明は、請求項1ないし4いずれか一記載の照明器具において、前記グローブは、その肉厚が外縁部から中央部にいくに従い薄くなるようにしたことを特徴とする。   According to a fifth aspect of the present invention, in the lighting apparatus according to any one of the first to fourth aspects, the thickness of the globe is reduced as it goes from the outer edge portion to the central portion.

請求項1記載の発明によれば、半導体発光素子の光出射方向に対向して配置され、半導体発光素子の光を主として平行方向に制御するレンズ体と、半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と、半導体発光素子および反射体を覆い外縁部から中央部にいくに従い透過率が高くなるようにしたグローブにより、輝度ムラ対策の必要な部分のみグローブの拡散性を上げ、必要のない部分の透過率を上げることができ、全体として輝度ムラを低減し、かつ器具効率を向上させることが可能な半導体発光素子を光源とした照明器具を提供することができる。   According to the first aspect of the present invention, the lens body that is arranged to face the light emitting direction of the semiconductor light emitting element and controls the light of the semiconductor light emitting element mainly in the parallel direction, and the abbreviated shape of the fixture body facing the semiconductor light emitting element. Diffuse the globe only in areas where it is necessary to take measures against uneven brightness, with the reflector tilted toward the center and the globe that covers the semiconductor light-emitting element and reflector so that the transmittance increases from the outer edge to the center. It is possible to provide a luminaire using a semiconductor light emitting element as a light source, which can improve the efficiency, increase the transmittance of unnecessary portions, reduce luminance unevenness as a whole, and improve the efficiency of the fixture. .

また、反射体の形状や反射特性を、典型的なグローブ形状に対して輝度均斉度が得られるように設計し、グローブ形状を変更した機種に対しては、グローブの透過率を制御して輝度ムラを低減することが可能となり、部品を共通化してコストの高騰を抑制した照明器具を提供することができる。   In addition, the reflector shape and reflection characteristics are designed so that brightness uniformity is obtained with respect to typical globe shapes, and for models with changed globe shapes, the transmittance of the globe is controlled to control the brightness. It is possible to reduce unevenness, and it is possible to provide a luminaire that can reduce costs by using common parts.

請求項2記載の発明によれば、半導体発光素子の光出射方向に対向して配置される長尺なコリメータレンズにより、光を反射体に照射し、光を効率的に利用して均斉度を高めて、全体として輝度ムラを低減し、かつ器具効率を向上させることが可能な半導体発光素子を光源とした照明器具を提供することができる。   According to the second aspect of the present invention, the long collimator lens disposed facing the light emitting direction of the semiconductor light emitting device irradiates the reflector with light, and efficiently uses the light to achieve uniformity. It is possible to provide a luminaire using a semiconductor light emitting element as a light source, which can increase the luminance unevenness as a whole and improve the fixture efficiency.

請求項3記載の発明によれば、平滑な入射面と、入射面の中心に第一焦点を有する断面略楕円形状をなす出射面を有するコリメータレンズにより、光を反射体に照射し、光を効率的に利用して均斉度を高めて、全体として輝度ムラを低減し、かつ器具効率を向上させることが可能な半導体発光素子を光源とした照明器具を提供することができる。   According to the third aspect of the present invention, the collimator lens having a smooth incident surface and an exit surface having a substantially elliptical cross section having a first focal point at the center of the incident surface is used to irradiate the reflector with the light. It is possible to provide a lighting fixture using a semiconductor light-emitting element as a light source, which can be efficiently used to increase uniformity, reduce luminance unevenness as a whole, and improve fixture efficiency.

請求項4記載の発明によれば、半導体発光素子は、その発光中心がコリメータレンズの第一焦点よりグローブ側に位置して配設されることにより、上向きの光が抑制されて輝度ムラが抑制され、効率よく高い均斉度を得ることができ、全体として輝度ムラを低減し、かつ器具効率を向上させることが可能な半導体発光素子を光源とした照明器具を提供することができる。   According to the fourth aspect of the present invention, the semiconductor light emitting element is arranged such that the light emission center is located on the globe side with respect to the first focal point of the collimator lens, so that upward light is suppressed and luminance unevenness is suppressed. Thus, it is possible to provide a lighting fixture using a semiconductor light-emitting element as a light source, which can efficiently obtain a high degree of uniformity, can reduce luminance unevenness as a whole, and can improve the fixture efficiency.

請求項5記載の発明によれば、グローブの肉厚が外縁部から中央部にいくに従い薄くなるようにした簡易な構成により、輝度ムラを低減し、かつ器具効率を向上させ、さらにコストの高騰を抑制した照明器具を提供することができる。   According to the invention described in claim 5, the simple structure in which the thickness of the glove becomes thinner as it goes from the outer edge portion to the central portion reduces luminance unevenness, improves the instrument efficiency, and further increases the cost. It is possible to provide a lighting fixture that suppresses the above.

以下、本発明に係る照明器具の実施形態について説明する。   Hereinafter, embodiments of the lighting apparatus according to the present invention will be described.

図1〜図3に示すように、本実施例の照明器具は、器具取付面Aに設置される器具本体10、半導体発光素子からなる光源体20、レンズ体30、反射体40およびグローブ50で構成する。   As shown in FIGS. 1 to 3, the lighting fixture of the present embodiment includes a fixture main body 10 installed on the fixture mounting surface A, a light source body 20 made of a semiconductor light emitting element, a lens body 30, a reflector 40, and a globe 50. Constitute.

器具本体10は、鉄板等の金属に白色塗装を施した一辺が約500mmの正方形をなすシャーシーとして構成され、シャーシーの略中央部には天井等の器具取付面Aに設置された引掛シーリング11に着脱可能に設置されるアダプタ12を設ける。さらに、アダプタ12の周囲の空間部に光源体20を点灯するための点灯装置13を取り付け、対向する辺の外縁部14、15に光源体20を設置するための設置部16、17を設ける。図中18は、リモコン受光部である。   The instrument body 10 is configured as a chassis in which a metal such as an iron plate is painted white and has a square of about 500 mm on one side. A hook ceiling 11 installed on an instrument mounting surface A such as a ceiling is provided at a substantially central portion of the chassis. An adapter 12 that is detachably installed is provided. Further, a lighting device 13 for lighting the light source body 20 is attached to a space around the adapter 12, and installation portions 16 and 17 for installing the light source body 20 are provided on the outer edge portions 14 and 15 of the opposite sides. In the figure, reference numeral 18 denotes a remote control light receiving unit.

光源体20は、半導体発光素子、本実施例では発光ダイオード21(以下「LED」と称す)で構成し、複数個のLED21を発光素子基板22に配置した直線状の長さが約100mmの線状の発光モジュール23として構成し、必要な個数、本実施例では5本の発光モジュールが選択されて1本の長尺な光源体20を構成する。この長尺な光源体20を2本用意して、器具本体10の対向する辺の外縁部14、15に設けられた設置部16、17に1本ずつ、発光部である各LED21がそれぞれ対向するようにして器具本体の外縁部に配設される。すなわち、器具本体のそれぞれの設置部16、17にはシャーシーから一体に形成された支持板24が立設され、支持板に各発光モジュールの発光素子基板22を取り付けて支持する(図2)。この支持板24は、各LED21の放熱板の作用を兼ね、また支持板の後面と後述するグローブ50の外周部内面との間で形成される空間部s内に、各LED21と点灯装置13を配線するためのコード等を収納する。   The light source body 20 is composed of a semiconductor light emitting element, in this embodiment, a light emitting diode 21 (hereinafter referred to as “LED”), and a linear line having a plurality of LEDs 21 arranged on the light emitting element substrate 22 and having a linear length of about 100 mm. The light emitting module 23 is formed in the shape, and a required number, in this embodiment, five light emitting modules are selected to constitute one long light source body 20. Two long light source bodies 20 are prepared, and one LED 21 as a light emitting part is opposed to each of the installation parts 16 and 17 provided on the outer edge parts 14 and 15 of the opposite sides of the instrument body 10. In this way, it is disposed on the outer edge of the instrument body. That is, a support plate 24 integrally formed from the chassis is erected on the installation portions 16 and 17 of the instrument body, and the light emitting element substrate 22 of each light emitting module is attached to and supported by the support plate (FIG. 2). The support plate 24 also functions as a heat radiating plate of each LED 21, and each LED 21 and the lighting device 13 are placed in a space portion s formed between the rear surface of the support plate and the inner surface of the outer periphery of the globe 50 described later. A cord for wiring is stored.

レンズ体30は、各LED21の光出射方向に対向し近接して配置され、LEDからの光を平行光にして広がりを持って出射させる長尺な凸レンズで構成し、支持板24に別途の支持具(図示せず)により取り付けられる。レンズ体30は、長さ約100mmの5本の発光モジュール23(全長約500mm)を全て覆って対向して配設できるように、長さ約500mmの1本の長尺な凸レンズで構成する(図3)。これにより、長尺な凸レンズによって長さ約100mmの5本の発光モジュール23の繋ぎ目の目地部分を覆い隠すことができ、レンズ体からはムラのない均一な光が放射される。なお、このレンズ体30は、上記各発光モジュール23自体にレンズが組み込まれている場合には設置を省略してもよい。   The lens body 30 is arranged in opposition to and close to the light emission direction of each LED 21, and is configured by a long convex lens that emits light from the LED as parallel light with a spread, and is separately supported by the support plate 24. It is attached with a tool (not shown). The lens body 30 is composed of a single long convex lens having a length of about 500 mm so that the five light emitting modules 23 having a length of about 100 mm (total length: about 500 mm) can be covered and disposed opposite to each other (see FIG. FIG. 3). Thereby, the joint portion of the joint of the five light emitting modules 23 having a length of about 100 mm can be covered by the long convex lens, and uniform light without unevenness is emitted from the lens body. The lens body 30 may be omitted when a lens is incorporated in each light emitting module 23 itself.

反射体40は、鉄板等の金属に白色塗装を施した平板状をなし、両端部を2本のそれぞれの光源体20における各LED21に対向し、中間部分から器具本体の略中央部に向かって連続的に徐々に傾斜させた傾斜部41を形成する。反射体は、器具本体10を構成するシャーシーの略中央部に、ネジ若しくはスポット溶接等の手段で固定される。   The reflector 40 has a flat plate shape in which a metal such as an iron plate is coated with white, has both ends opposed to the LEDs 21 in the two light source bodies 20, and from an intermediate portion toward a substantially central portion of the instrument body. An inclined portion 41 that is continuously and gradually inclined is formed. The reflector is fixed to a substantially central portion of the chassis constituting the instrument body 10 by means such as screws or spot welding.

グローブ50は、透光性を有する乳白色の半透明な合成樹脂で構成し、浅い皿状の球面状をなす発光部51と、器具本体10の外縁部14、15に対応する部分に外周部を残して上面を開口することにより形成した開口部52とを一体に形成し、器具本体の下方から被せることにより、光源体20および反射体40を覆うように器具本体の下面全体を囲むようにして取り付けられる。グローブ50は、その肉厚を器具本体10の外縁部14、15に対応するグローブの外周部から中央部にいくに従い薄くなるようにして成形し、外縁部から中央部にいくに従い透過率が高くなるように構成する。なお、グローブ50は公知の凹凸の係合手段や取付金具等の手段で器具本体の外縁部に着脱可能に取り付けられる。   The globe 50 is made of a translucent milky white translucent synthetic resin, and has a light emitting part 51 having a shallow dish-like spherical shape, and an outer peripheral part corresponding to the outer edge parts 14 and 15 of the instrument body 10. The opening 52 formed by opening the remaining upper surface is integrally formed, and is attached so as to surround the entire lower surface of the instrument body so as to cover the light source body 20 and the reflector 40 by covering from below the instrument body. . The globe 50 is formed such that its wall thickness decreases from the outer peripheral portion of the glove corresponding to the outer edge portions 14 and 15 of the instrument body 10 to the central portion, and the transmittance increases as it goes from the outer edge portion to the central portion. Configure to be The globe 50 is detachably attached to the outer edge portion of the instrument body by means of a known uneven engagement means, a mounting bracket or the like.

上記のように構成されたシーリングライトからなる照明器具は、天井等の器具取付面Aに設けられた引掛シーリング11にアダプタ12を係合し、アダプタを器具本体に係合することにより、電気的に電源と接続されると同時に、機械的に支持され設置される(図1)。   The lighting fixture which consists of a ceiling light comprised as mentioned above is electrically connected by engaging the adapter 12 with the hook ceiling 11 provided on the fixture mounting surface A such as the ceiling, and engaging the adapter with the fixture body. At the same time, it is mechanically supported and installed (FIG. 1).

上記に設置された照明器具を点灯すると、光源体20の各LED21が発光し、LEDから放射された光はレンズ体30により、略平行な方向、すなわち、反射体40の傾斜部41に向かって放射され、さらに反射体で反射してグローブ50を内面側から照射し、部屋全体にわたり略均一な明るさで照明する。この際、光源体20が器具本体10の外縁部14,15に配設され、従来のように環形蛍光ランプが器具本体の中央部に存在しない。このため、ランプイメージがグローブの照射中心部に現れずに均斉度が向上する。また、グローブ50は、その肉厚を器具本体10の外縁部14、15に対応するグローブの外周部から中央部にいくに従い薄くなるようにして成形し、外縁部から中央部にいくに従い透過率が高くなるように構成してあるので、輝度ムラ対策の必要な部分のみグローブの拡散性を上げ、必要のない部分の透過率を上げることができる。   When the lighting fixture installed above is turned on, each LED 21 of the light source body 20 emits light, and the light emitted from the LED is directed by the lens body 30 in a substantially parallel direction, that is, toward the inclined portion 41 of the reflector 40. The light is emitted and further reflected by a reflector so that the globe 50 is irradiated from the inner surface side, and the entire room is illuminated with substantially uniform brightness. At this time, the light source body 20 is disposed on the outer edge portions 14 and 15 of the instrument main body 10, and the annular fluorescent lamp does not exist in the central part of the instrument main body as in the related art. For this reason, a lamp image does not appear in the irradiation center part of a glove, but a uniformity improves. In addition, the globe 50 is formed such that the thickness thereof becomes thinner as it goes from the outer peripheral portion of the globe corresponding to the outer edge portions 14 and 15 of the instrument body 10 toward the central portion, and the transmittance is increased as it goes from the outer edge portion to the central portion. Therefore, it is possible to increase the diffusibility of the globe only in a portion where the luminance unevenness countermeasure is necessary and increase the transmittance in the unnecessary portion.

すなわち、器具本体10の外縁部14、15は、光源に近く、また5個の線状の発光モジュール23を接続して長尺な光源体を構成した繋ぎ目の目地部分が暗部となったり、製造バラツキ等によりLED21とレンズ体30の隙間から光が漏れグローブ50に照射されて輝線が出たり、さらに空間部s内に収納された光源体20と点灯装置13を配線するためのコード等の写りこみや影が出やすく、特に輝度ムラ対策が必要な部分となっている。また、器具本体10の中央部は、アダプタ12やリモコン受光部18があるために暗部になりやすくグローブの透過率が高いことが望ましい。   That is, the outer edge portions 14 and 15 of the instrument body 10 are close to the light source, and the joint portion of the joint that forms a long light source body by connecting five linear light emitting modules 23 becomes a dark portion, Due to manufacturing variations, light leaks from the gap between the LED 21 and the lens body 30 and is emitted to the globe 50 to generate a bright line, and further, a cord for wiring the light source body 20 accommodated in the space portion s and the lighting device 13 Reflections and shadows are likely to appear, and this is a part that particularly requires measures against uneven brightness. Moreover, since the center part of the instrument main body 10 has the adapter 12 and the remote control light-receiving part 18, it is easy to become a dark part and it is desirable that the transmittance | permeability of a glove is high.

本実施例のグローブ50は、上記のように、輝度ムラ対策の必要な器具本体10の外縁部14、15に対応するグローブの外周部を肉厚にしたので、光源の繋ぎ目の目地部分による暗部や漏れる光の輝線、さらにコードイメージ等をなくすことができる。また、高い透過率が必要な中央部の肉厚を薄くしたので、アダプタ12やリモコン受光部18の暗部もなくなり、グローブ全体としての輝度ムラが低減し、均斉度を一層向上させることができ、従来のように、グローブ全体の透過率を下げて輝度ムラを低減させる必要がなくなり器具効率を上げることができる。   As described above, the globe 50 according to the present embodiment has a thick outer peripheral portion of the globe corresponding to the outer edge portions 14 and 15 of the instrument body 10 that needs countermeasures against luminance unevenness. It can eliminate dark areas, leaking light emission lines, and code images. In addition, since the thickness of the central portion where high transmittance is required is reduced, the dark portion of the adapter 12 and the remote control light receiving portion 18 is also eliminated, the luminance unevenness as the entire globe can be reduced, and the uniformity can be further improved. As in the past, it is not necessary to reduce the luminance unevenness by reducing the transmittance of the entire globe, and the efficiency of the appliance can be increased.

また、各LED21から発生した熱は、各発光モジュール23の発光素子基板22からシャーシーに一体に形成された支持板24を介して面積の広いシャーシーに伝達され効率よく放熱される。   Further, the heat generated from each LED 21 is transmitted from the light emitting element substrate 22 of each light emitting module 23 to the chassis having a large area through the support plate 24 formed integrally with the chassis, and is efficiently radiated.

なお、器具本体10の光源20を支持した支持板24と、グローブ50の外周部との間に空間部sが形成され、暗部になりやすくなるが上記のようにグローブの外周部に肉厚が厚く形成されているので暗部が目立たなくなる。また空間部sに各LED21から発生する熱がこもり温度が高くなりやすいが、この部分のグローブの肉厚が厚く形成されているので、熱による変色、変形を防止する。   A space portion s is formed between the support plate 24 supporting the light source 20 of the instrument body 10 and the outer peripheral portion of the globe 50, which tends to be a dark portion, but the outer peripheral portion of the globe has a thickness as described above. Since it is formed thick, the dark part becomes inconspicuous. Moreover, although the heat generated from each LED 21 is concentrated in the space portion s and the temperature tends to be high, discoloration and deformation due to heat are prevented because the thickness of the glove in this portion is thick.

上述した照明器具は、部屋の雰囲気等に合わせた数多くのグローブ形状の機種、ラインナップに対して、次のように対応する。   The lighting fixtures described above correspond to a number of globe-shaped models and lineups that match the atmosphere of the room as follows.

すなわち、照明器具における反射体40の形状や反射特性は、普及機種等の典型的なグローブ形状に対して輝度均斉度が得られるように設計し、意匠的にグローブ形状を変化させる機種に対しては、反射体は共通化し、グローブ自体の透過率を制御して対応する。グローブ50の透過率の制御は、例えば、上述したグローブの肉厚の変更による手段でも、さらには、スクリーン印刷によるグラデーションを形成して透過率を変化させても、拡散材の配合を変化させることによって形成しても、凹凸部等による拡散部の密度を変化させて形成するようにしてもよい。これにより、反射体40をラインナップされた各機種に対して共通化することができ、開発コスト、および部品コストを削減することができる。   That is, the shape and reflection characteristics of the reflector 40 in the lighting fixture are designed so that the luminance uniformity is obtained with respect to a typical glove shape such as a popular model, and for a model in which the glove shape is changed in design. The reflector is used in common by controlling the transmittance of the globe itself. The transmittance of the globe 50 can be controlled, for example, by means of changing the thickness of the globe described above, or even by changing the transmittance by forming a gradation by screen printing to change the transmittance. Alternatively, it may be formed by changing the density of the diffusion part due to the uneven part or the like. Thereby, the reflector 40 can be made common to each model in the lineup, and development costs and component costs can be reduced.

以上、本実施例によれば、輝度ムラ対策の必要な器具本体10の外縁部14、15に対応するグローブ50の外周部を肉厚にし、高い透過率が必要な中央部の肉厚を薄くしたので全体として輝度ムラが低減し、器具効率を上げることができる。また、各LED21から発生した熱は、支持板24を介して面積の広いシャーシーに伝達され効率よく放熱される。   As described above, according to the present embodiment, the outer peripheral portion of the globe 50 corresponding to the outer edge portions 14 and 15 of the instrument body 10 that needs countermeasures against luminance unevenness is made thick, and the thickness of the central portion that requires high transmittance is made thin. As a result, luminance unevenness is reduced as a whole, and the instrument efficiency can be increased. Further, the heat generated from each LED 21 is transmitted to the chassis having a large area via the support plate 24 and efficiently radiated.

器具本体10の光源体20を支持する支持板24と、グローブ50の外周部との間に空間部sが形成されるので、配線コード等の収納スペースとして活用することができる。また、この空間部sは暗部になりやすくなるが、空間部に対応するグローブの外周部は肉厚が厚く形成されているので暗部が目立たなくなる。また空間部sに各LED21から発生する熱がこもり温度が高くなりやすいが、この部分のグローブ50の肉厚が厚く形成されているので、熱による変色、変形等を防ぐことができる。さらに、グローブ50の外周部が厚くなっているので、開口部52の開口縁部の強度も強くなり、保守、点検等の際にグローブを着脱しても破損しにくい丈夫なグローブを提供することができる。   Since the space portion s is formed between the support plate 24 that supports the light source body 20 of the instrument body 10 and the outer peripheral portion of the globe 50, it can be used as a storage space for wiring cords and the like. Moreover, although this space part s tends to become a dark part, since the outer peripheral part of the glove corresponding to the space part is formed thick, the dark part becomes inconspicuous. Moreover, although the heat generated from each LED 21 is concentrated in the space portion s and the temperature tends to be high, discoloration, deformation, and the like due to heat can be prevented because the thickness of the globe 50 in this portion is thick. Furthermore, since the outer periphery of the globe 50 is thick, the strength of the opening edge of the opening 52 is increased, and a durable glove that is not easily damaged even when the globe is attached or detached during maintenance or inspection is provided. Can do.

反射体40をラインナップされた各機種に対して共通化することができ、コスト的にも有利な照明器具を提供することができる。   The reflector 40 can be used in common for each model in the lineup, and a lighting fixture that is advantageous in terms of cost can be provided.

以上、本実施例において、レンズ体30を5本の発光モジュール23を全て覆って対向して配設できるように、長さ約500mmの1本の長尺な凸レンズで構成したが、2本に分割して構成しても、さらに、個々の発光モジュール23に対応して5本に分割して構成してもよい。   As described above, in this embodiment, the lens body 30 is configured by one long convex lens having a length of about 500 mm so that all the five light emitting modules 23 can be covered and disposed. Even if it divides | segments and comprises, it may comprise further dividing | segmenting into 5 corresponding to each light emitting module 23. FIG.

器具本体10の光源体20を支持する支持板24を、シャーシーと一体に形成したが、アルミニウム等で構成した別体の支持板で構成してもよい。この場合も支持板をシャーシーに取り付けることにより、熱的に接続されてLEDの放熱作用も行うことができる。   Although the support plate 24 that supports the light source body 20 of the instrument body 10 is formed integrally with the chassis, it may be formed of a separate support plate made of aluminum or the like. Also in this case, by attaching the support plate to the chassis, the LED is thermally connected and can also perform the heat dissipation action of the LED.

角形の照明器具を構成して、光源体20を対向する外縁部14、15に2本配設したが、各4辺に計4本の光源を配置してもよい。さらに丸形の照明器具を構成し、発光モジュール23をリング状に連結して光源体を構成し、器具本体10の外縁部14、15の周囲全体にわたって配設するようにしてもよい。   Although the square lighting fixture is comprised and the two light source bodies 20 are arrange | positioned in the outer edge parts 14 and 15 which oppose, a total of four light sources may be arrange | positioned to each four sides. Further, a round lighting fixture may be configured, and the light emitting module 23 may be connected in a ring shape to form a light source body, which may be disposed over the entire periphery of the outer edge portions 14 and 15 of the fixture main body 10.

照明器具をペンダント形のシーリングライトを構成したが、天井直付け形のシーリングライトを構成しても、さらにオフィス等施設、業務用などの各種の照明器具を構成してもよい。   Although the lighting fixture is configured as a pendant type ceiling light, it may be configured as a ceiling-mounted ceiling light, or may be configured as various types of lighting fixtures for facilities such as offices and businesses.

本実施例は、照明器具のレンズ体として、焦点を出た光が無収差の平行光となってレンズを出るコリメータレンズで構成したものである。   In the present embodiment, the lens body of the lighting fixture is configured by a collimator lens in which the focused light is converted into non-aberration parallel light and exits the lens.

以下、図4〜図7に従い、その構成を説明する。なお、各図には実施例1と同一部分には同一符号を付し詳細な説明は省略する。   The configuration will be described below with reference to FIGS. In addition, in each figure, the same code | symbol is attached | subjected to the same part as Example 1, and detailed description is abbreviate | omitted.

図4〜図6に示すように、照明器具は、器具取付面Aに設置される器具本体10、LED21からなる光源体20、LEDの光出射方向に対向して配置される長尺なコリメータレンズ60、実施例1と同様に光源体20のLED21に対向し器具本体10の略中央部に向かって傾斜させた反射体40、光源体20および反射体40を覆うグローブ50で構成する。本実施例におけるグローブ50は、実施例1と異なり、全体が均一な肉厚で構成されている。   As shown in FIGS. 4 to 6, the lighting fixture includes a fixture main body 10 installed on the fixture mounting surface A, a light source body 20 composed of LEDs 21, and a long collimator lens arranged facing the light emission direction of the LEDs. 60, similar to the first embodiment, the reflector 40 is opposed to the LED 21 of the light source body 20 and is inclined toward the substantially central portion of the instrument body 10, and the globe 50 covers the light source body 20 and the reflector 40. Unlike the first embodiment, the globe 50 in the present embodiment is configured with a uniform wall thickness as a whole.

コリメータレンズ60は、図6(a)に示すように、平滑な入射面61、入射面の中心に第一焦点aを有する断面略楕円形状をなす出射面62、入射面の上下部分を切り欠いて形成した断面三角形状の凹部63、63および凹部の両側に一体に形成した支持部64、64を有する。このコリメータレンズ60は、図5に示すように、入射面の第一焦点aを出た光が無収差の平行光となって断面略楕円形状をなす出射面62から出射される。   As shown in FIG. 6A, the collimator lens 60 includes a smooth incident surface 61, an exit surface 62 having a substantially elliptical cross section having a first focal point a at the center of the incident surface, and upper and lower portions of the incident surface. And the support portions 64 and 64 integrally formed on both sides of the recess. As shown in FIG. 5, the collimator lens 60 emits light from the first focal point a of the incident surface as a non-aberration parallel light and is emitted from an emission surface 62 having a substantially elliptical cross section.

上記構成のコリメータレンズ60は、図6(b)に示すように、長さ約100mmの5本の発光モジュール23(全長約500mm)を全て覆って対向して配設できるように、長さ約250mmの長尺なコリメータレンズ60を2本用意する。これにより、長尺なコリメータレンズ60によって長さ約100mmの5本の発光モジュール23の繋ぎ目の目地部分を覆い隠すことができ、コリメータレンズ60からはムラのない均一な光が放射される。   As shown in FIG. 6 (b), the collimator lens 60 having the above-described configuration has a length of about 100 mm so as to cover and face all five light emitting modules 23 (about 500 mm in total length) having a length of about 100 mm. Two 250 mm long collimator lenses 60 are prepared. Thereby, the joint portion of the joint of the five light emitting modules 23 having a length of about 100 mm can be covered by the long collimator lens 60, and uniform light without unevenness is emitted from the collimator lens 60.

上記2本のコリメータレンズ60は、光源体20における各LED21の発光中心bがコリメータレンズ60の第一焦点aより所定の寸法cだけグローブ側(図5において上方、図6(a)において下方)に位置し、かつ平滑な入射面61に接するように配設される。コリメータレンズ60は、支持部64、64を使用して各発光モジュール23の発光素子基板22の表面側に取り付けて支持される。   In the two collimator lenses 60, the light emission center b of each LED 21 in the light source body 20 is on the globe side by a predetermined dimension c from the first focal point a of the collimator lens 60 (upper in FIG. 5, lower in FIG. 6 (a)). And is disposed so as to be in contact with the smooth incident surface 61. The collimator lens 60 is attached to and supported by the surface side of the light emitting element substrate 22 of each light emitting module 23 using the support portions 64 and 64.

上記に構成したLED21およびコリメータレンズ60からなる光源体20を2本用意し、実施例1と同様に、器具本体10の対向する辺の外縁部14、15に設けられた設置部16、17に1本ずつ、発光部であるLED21がそれぞれ対向するようにして器具本体の外縁部に配設し、実施例1と同様に構成された反射体40を含めて覆うようにグローブ50を被せて照明器具を構成する(図4)。なおグローブ50は上述したように実施例1とは異なり肉厚の均一なもので構成する。   Two light source bodies 20 composed of the LED 21 and the collimator lens 60 configured as described above are prepared, and in the same manner as in the first embodiment, the installation portions 16 and 17 provided on the outer edge portions 14 and 15 of the opposite sides of the instrument body 10 are provided. One by one, the LEDs 21 as light emitting parts are arranged on the outer edge of the instrument body so as to face each other, and the globe 50 is covered so as to cover the reflector 40 configured in the same manner as in the first embodiment. The instrument is configured (FIG. 4). As described above, the globe 50 is configured with a uniform thickness unlike the first embodiment.

なお、コリメータレンズ60の入射面に形成した断面三角形状の凹部63、63内に、5本の発光モジュールそれぞれを電気的に接続するための配線コードや連結のための接続部品等を収納して構成する。   In addition, wiring cords for electrically connecting each of the five light emitting modules, connecting parts for connection, and the like are accommodated in the concave portions 63, 63 formed in the triangular cross section formed on the incident surface of the collimator lens 60. Constitute.

上記に構成された照明器具において、器具の均斉度を実験により測定した。すなわち、図5に示すように、光源体20における各LED21の発光中心bをコリメータレンズ60の第一焦点aに対して所定の寸法c(yプラス方向とyマイナス方向(グローブ側(図5において上方)と反グローブ方向(図5において下方))に偏心させて、均斉度を測定した。   In the lighting fixture configured as described above, the uniformity of the fixture was measured by experiment. That is, as shown in FIG. 5, the light emission center b of each LED 21 in the light source body 20 has a predetermined dimension c (y plus direction and y minus direction (glove side (in FIG. 5) in relation to the first focal point a of the collimator lens 60). The degree of uniformity was measured by decentering in the upward direction and the anti-globe direction (downward in FIG. 5).

その結果を表1に示す。LED中心線位置(寸法c)が約0.5mm(No.5)で均斉度が一番よくなり、中心線位置が0mmのLEDの発光中心bとコリメータレンズの第一焦点aを一致させた場合(No.3)と対比すると、均斉度が約1割向上していることが理解される。また、反対側(yマイナス方向)に偏心させた場合には約1割低下することが理解できる。なお、さらにグローブ側(yプラス方向に偏心させると均斉度は低下していく。   The results are shown in Table 1. When the LED center line position (dimension c) is about 0.5 mm (No. 5), the uniformity is the best, and the light emission center b of the LED whose center line position is 0 mm coincides with the first focus a of the collimator lens. Compared with the case (No. 3), it is understood that the uniformity is improved by about 10%. In addition, it can be understood that when it is decentered to the opposite side (y minus direction), it is reduced by about 10%. Furthermore, the degree of homogeneity decreases as the glove is further decentered in the y-plus direction.

また、上記のようにLED中心線位置を偏心させた場合の、グローブの光源側θ1から中心側θ20における光源の軸に直交する中央線x−x(図1(b))上の光束を測定した。その結果を、図7のグラフに示す。この結果からもLED中心線位置(寸法c)が約0.5mm(No.5)で均斉度が一番よくなっていることが理解できる。   Further, when the LED center line position is decentered as described above, the light flux on the center line xx (FIG. 1B) orthogonal to the light source axis from the light source side θ1 to the center side θ20 of the globe is measured. did. The result is shown in the graph of FIG. From this result, it can be understood that the uniformity is the best when the LED center line position (dimension c) is about 0.5 mm (No. 5).

Figure 2008300203
上記の実験結果から明らかなように、本実施例の照明器具を点灯すると、均斉度が良好となってグローブ全体としての輝度ムラが低減し、均斉度を一層向上させることができ、従来のように、グローブ全体の透過率を下げて輝度ムラを低減する必要がなくなり器具効率を上げることができる。
Figure 2008300203
As is clear from the above experimental results, when the lighting fixture of this example is turned on, the uniformity is good, the luminance unevenness of the entire globe is reduced, and the uniformity can be further improved. In addition, it is not necessary to reduce the luminance unevenness by lowering the transmittance of the entire globe, so that the instrument efficiency can be increased.

特に、レンズ体として焦点を出た光が無収差の平行光となってレンズを出るコリメータレンズ60を使用したので、光源の光を無駄なく前方の反射体に照射して光を効率的に利用することができると共に、目的とする均斉度を容易かつ確実に得ることができる。さらに、コリメータレンズ60により上向き(反グローブ側)の光が抑制されるため、輝度ムラが抑制され効率よく均斉度が得られる。しかも、グローブ50の透過率を変えることなく行えるので、一層簡易な手段で効果的な均斉度を得ることができる。   In particular, since the collimator lens 60 is used as the lens body, in which the focused light becomes the aberration-free parallel light and exits the lens, the light from the light source is efficiently used by irradiating the front reflector without waste. In addition, the desired uniformity can be obtained easily and reliably. Furthermore, since upward light (on the opposite side of the globe) is suppressed by the collimator lens 60, luminance unevenness is suppressed, and the uniformity can be obtained efficiently. And since it can carry out without changing the transmittance | permeability of the globe 50, an effective uniformity can be obtained by a simpler means.

さらに、上記実験で行ったように、LED中心位置、換言すれば、光源の位置を偏心させることにより、配光の制御も行うことが可能となる。因みに、コリメータレンズ60の焦点aに対してグローブ側(図5の上側)に偏心させると光は下向きに、反グローブ側(図5の下側)に偏心させると光は上向きになることが、上記の実験で明らかになっている。   Further, as performed in the above-described experiment, it is possible to control light distribution by decentering the LED center position, in other words, the position of the light source. Incidentally, when the beam is decentered toward the globe side (upper side in FIG. 5) with respect to the focal point a of the collimator lens 60, the light is directed downward, and when decentered toward the anti-globe side (lower side in FIG. 5), the light is directed upward. It is clear from the above experiment.

以上、本実施例において、コリメータレンズ60を5本の発光モジュール23を全て覆って対向して配設できるように、長さ約250mmの2本の長尺なレンズで構成したが、実施例1と同様に500mmの長さの1本のレンズで構成しても、さらに、個々の発光モジュールに対応して5本に分割して構成してもよい。コリメータレンズ60の入射面に形成した断面三角形状の凹部63、63は省略してもよい。   As described above, in this embodiment, the collimator lens 60 is configured by two long lenses having a length of about 250 mm so as to cover all the five light emitting modules 23 and face each other. Similarly to the above, it may be configured by one lens having a length of 500 mm, or may be further divided into five corresponding to each light emitting module. The concave portions 63 and 63 having a triangular cross section formed on the incident surface of the collimator lens 60 may be omitted.

また、本実施例におけるコリメータレンズ60を、実施例1の凸レンズ30に代えて使用し、コリメータレンズ60によって均斉度を向上させると共に、実施例1におけるグローブ自体の透過率を制御して行う均斉度向上手段を組み合わせ、より一層確実な均斉度を得るように構成してもよい。   Further, the collimator lens 60 in this embodiment is used in place of the convex lens 30 in the first embodiment, and the uniformity is improved by controlling the transmittance of the globe itself in the first embodiment while improving the uniformity by the collimator lens 60. You may comprise so that a more reliable uniformity may be acquired combining an improvement means.

その他、本実施例における他の構成、作動、作用効果、変形例等は、実施例1と同様である。   Other configurations, operations, operational effects, modifications, and the like in this embodiment are the same as those in the first embodiment.

以上、本発明の好適な実施形態を説明したが、本発明は上述の各実施例に限定されることなく、本発明の要旨を逸脱しない範囲内において、種々の設計変更を行うことができる。   The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

本発明の第一の実施形態に係る照明器具を示し、(a)は縦断面図、(b)はグローブを外した状態の平面図。The lighting fixture which concerns on 1st embodiment of this invention is shown, (a) is a longitudinal cross-sectional view, (b) is the top view of the state which removed the glove. 同じく照明器具の器具本体の外縁部を拡大して示す断面図。Sectional drawing which expands and similarly shows the outer edge part of the fixture main body of a lighting fixture. 同じく照明器具の光源体の正面図。The front view of the light source body of a lighting fixture similarly. 本発明の第二の実施形態に係る照明器具の縦断面図。The longitudinal cross-sectional view of the lighting fixture which concerns on 2nd embodiment of this invention. 同じく照明器具のコリメータレンズの特性を説明するための断面図。Sectional drawing for demonstrating the characteristic of the collimator lens of a lighting fixture similarly. 同じく照明器具のコリメータレンズの支持部分を示し、(a)は一部を切り欠き断面して示す斜視図、(b)は正面図。Similarly, the support part of the collimator lens of a lighting fixture is shown, (a) is a perspective view which cuts out a part and shows it, and (b) is a front view. 同じく照明器具の実験結果を示し、グローブの光源側θ1から中心側θ20における均斉度を示すグラフ。The graph which similarly shows the experimental result of a lighting fixture and shows the uniformity from the light source side θ1 to the center side θ20 of the globe.

符号の説明Explanation of symbols

10 器具本体
14、15 外縁部
21 半導体発光素子
30 レンズ体
40 反射体
50 グローブ
DESCRIPTION OF SYMBOLS 10 Instrument main body 14,15 Outer edge part 21 Semiconductor light emitting element 30 Lens body 40 Reflector 50 Globe

Claims (5)

器具本体と;
器具本体の外縁部に配設される半導体発光素子と;
半導体発光素子の光出射方向に対向して配置され、半導体発光素子の光を主として平行方向に制御するレンズ体と;
半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と;
半導体発光素子および反射体を覆い外縁部から中央部にいくに従い透過率が高くなるようにしたグローブと;
を具備することを特徴とする照明器具。
An instrument body;
A semiconductor light emitting device disposed on the outer edge of the instrument body;
A lens body disposed opposite to the light emitting direction of the semiconductor light emitting element and controlling light of the semiconductor light emitting element mainly in a parallel direction;
A reflector facing the semiconductor light emitting element and inclined toward a substantially central portion of the fixture body;
A glove that covers the semiconductor light emitting element and the reflector and has a higher transmittance as it goes from the outer edge to the center;
The lighting fixture characterized by comprising.
器具本体と;
器具本体の外縁部に配設される半導体発光素子と;
半導体発光素子の光出射方向に対向して配置される長尺なコリメータレンズと;
半導体発光素子に対向し器具本体の略中央部に向かって傾斜させた反射体と;
半導体発光素子および反射体を覆うグローブと;
を具備することを特徴とする照明器具。
An instrument body;
A semiconductor light emitting device disposed on the outer edge of the instrument body;
A long collimator lens disposed facing the light emitting direction of the semiconductor light emitting device;
A reflector facing the semiconductor light emitting element and inclined toward a substantially central portion of the fixture body;
A globe covering the semiconductor light emitting element and the reflector;
The lighting fixture characterized by comprising.
前記コリメータレンズは、平滑な入射面と;
入射面の中心に第一焦点を有する断面略楕円形状をなす出射面と;
を具備することを特徴とする請求項2記載の照明器具。
The collimator lens comprises a smooth entrance surface;
An exit surface having a substantially elliptical cross section having a first focal point at the center of the entrance surface;
The lighting fixture according to claim 2, comprising:
前記半導体発光素子は、その発光中心がコリメータレンズの第一焦点よりグローブ側に位置して配設されることを特徴とする請求項2または3記載の照明器具。 The lighting device according to claim 2, wherein the semiconductor light emitting element is disposed such that a light emission center thereof is positioned on a globe side with respect to a first focal point of a collimator lens. 前記グローブは、その肉厚が外縁部から中央部にいくに従い薄くなるようにしたことを特徴とする請求項1ないし4いずれか一記載の照明器具。

The lighting fixture according to any one of claims 1 to 4, wherein the glove has a thickness that decreases with increasing thickness from the outer edge to the center.

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