JPH11213730A - Luminaire - Google Patents

Luminaire

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Publication number
JPH11213730A
JPH11213730A JP10012537A JP1253798A JPH11213730A JP H11213730 A JPH11213730 A JP H11213730A JP 10012537 A JP10012537 A JP 10012537A JP 1253798 A JP1253798 A JP 1253798A JP H11213730 A JPH11213730 A JP H11213730A
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JP
Japan
Prior art keywords
light guide
light
surface
guide plate
led
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JP10012537A
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Japanese (ja)
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JP3817665B2 (en
Inventor
Yasuo Imai
Kenichi Ishii
Emiko Kitamura
Shigeru Myodo
康雄 今井
恵美子 北村
成 明道
健一 石井
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
三菱電機株式会社
三菱電機照明株式会社
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Application filed by Mitsubishi Electric Corp, Mitsubishi Electric Lighting Corp, 三菱電機株式会社, 三菱電機照明株式会社 filed Critical Mitsubishi Electric Corp
Priority to JP01253798A priority Critical patent/JP3817665B2/en
Publication of JPH11213730A publication Critical patent/JPH11213730A/en
Application granted granted Critical
Publication of JP3817665B2 publication Critical patent/JP3817665B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To provide a luminaire that can enhance luminescent surface brightness and irradiated surface illuminance without changing the luminaire image. SOLUTION: This luminaire has multiple LEDs 8, is equipped with a hollow light guiding plate 1 immediately under the LEDs 8 and is provided with a post 5 to support the light guiding plate 1 along the center axis of the light guiding plate 1. In this case, a diffusing layer 2 having a diffusive reflection property and a diffusive transmission property is formed on the inside surface of a light guiding part 1a of the light guiding plate 1, a diffusive reflection layer 6 is formed on the surface of the post 5, and the LEDs 8 are placed along the upper end surface 3 of the light guiding part 1a.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、長寿命光源であるLEDを使用して照明と表示を行う照明器具に係り、より詳しくは、照明用としては、例えば歩道に沿って施設されるパスウェイライトや建物の周辺部からエントランスまでに施設されるアプローチライト、表示用としては、建物内外の案内表示灯などに用いられる照明器具に関するものである。 BACKGROUND OF THE INVENTION The present invention relates to a luminaire to view and illuminated using an LED has a long life light source, more specifically, the lighting, for example, pathway lights are facilities along the sidewalk and the building of approach lights from the periphery is property at the entrance, as the display, the present invention relates to lighting devices used in such guidance display lights of the building inside and outside.

【0002】 [0002]

【従来の技術】図13は、例えば特開平9ー92015 BACKGROUND ART FIG. 13, for example, JP-A-9-1 92015
号公報に開示された従来の表示灯の一例を示す一部を切断した斜視図である。 It is a perspective view partially cut away showing an example of a conventional display light disclosed in JP. 円筒状に形成されたケース本体2 Case formed in cylindrical body 2
0の内側には光源21が配設され、ケース本体20の周面には発光レンズ22が設けられてその各々が長手方向に沿ってシリンドリカルレンズを形成しており、その断面形状は円柱レンズ効果が期待できる円弧状になっている。 Inside the 0 is the light source 21 is disposed, on the peripheral surface of the case body 20 forms the respective light-emitting lens 22 is provided a cylindrical lens along the longitudinal direction, the cross-sectional shape of the cylindrical lens effect There has been in an arc shape can be expected. また、ケース本体20の内表面には微細な凹凸面が形成され、光源光を乱反射して内分散乱光とし、光を均一化するようになっている。 Further, on the inner surface of the case body 20 is formed fine uneven surface, and internally divided scattered light by irregular reflection light from the light source, so as to equalize the light.

【0003】図14は、例えば特開平4ー179990 [0003] Figure 14, for example JP-4-179990
号公報に開示された従来の表示照明器具の一例を示す断面図である。 No. is a sectional view showing an example of a conventional display lighting fixtures disclosed in the Japanese. 表示箱23は断面U字状に形成され、導光体24と反射板25とを収納し、導光体24の前面に透過してくる透過光により照射される表示面26を有する。 Display box 23 is formed to have a U-shaped cross section, and houses the light guide 24 and the reflecting plate 25, having a display surface 26 illuminated by the transmitted light coming transmitted to the front surface of the light guide 24. そして導光体24の上端面27からランプ28の光を入射させ、反射板25で導光体24の上端面27から入射し導光体14の背面29を通過してくる屈折光を前面に反射させる。 And from the upper end surface 27 of the light guide 24 with a light having a lamp 28, a refracted light coming through the back 29 of the reflector 25 is incident from the upper end surface 27 of the light guide 24 by light guide 14 to the front to reflect.

【0004】 [0004]

【発明が解決しようとする課題】上記のように構成した照明器具によれば、LEDは指向性が強く1個あたりの光束も大きくないため、表示などにその用途が限定されていた。 According to the lighting fixture which is configured as described above The present invention is to provide a, LED because not greater flux per one highly directional, its use was limited to a display. また、LEDを面上に敷き詰めたり、薄い矩形状導光板を利用したりして、面発光光源としての利用も考えられるが、配光に方向性が生じるなどの問題もあり、パスウエイライトやアプローチライトには使えなかった。 It can also spread the LED on the surface, or by utilizing a thin rectangular light guide plate, but also conceivable use as a surface emitting light source, there is also a problem such as directionality is generated in the light distribution, Pathway lights and approach It did not work for light. さらに、LEDの分光分布は特定波長にピークを持つため、赤、橙、緑などの光源色となり、照明用としてみると不自然であり、対象物が自然に見えないなどの問題もあった。 Furthermore, since the spectral distribution of an LED having a peak at a specific wavelength, becomes red, orange, and light source color such as green, is unnatural viewed as lighting, object there is a problem such as invisible natural.

【0005】また、パスウエイライトやアプローチライトは、その設置場所周辺の設置面の水平面照度が必要であるが、積極的な意味で設置面周辺の照射範囲や照度値の調整ができなかった。 [0005] Pathway lights and approach lights, its is necessary horizontal illuminance of the installation surface of the installation location around failed adjustment of the irradiation range and intensity values ​​of the installation surface near aggressive sense. さらに、この種の照明器具は屋外用であるため、取付工事には地中への配線工事が必要であるが、場所によっては設置場所周辺に電源がないこともあり、取付けができない場合も多かった。 Furthermore, the luminaire of this kind since it is outdoor, but the installation work is necessary wiring work to the ground, there may be no power to site surrounding the location, often it may not be able to mount It was.

【0006】本発明は上記のような課題を解決するためになされたもので、LEDを使用して発光面輝度と水平面方向の配光を均一化すると共に、足元の水平面照度も確保することができる照明器具を得ることを目的とする。 [0006] The present invention has been made to solve the above problems, along with using the LED to uniformize the light distribution of the light emission surface brightness and the horizontal plane direction, that the horizontal illuminance of the feet also ensuring and to obtain a possible luminaire. また、発光面輝度と足元部の水平面照度を高めることができる照明器具を得ることを目的とする。 Further, an object is to obtain a lighting apparatus capable of increasing the horizontal illuminance of the light emitting surface brightness and feet of. さらに、 further,
演色性を改善することができる照明器具を得ることを目的とする。 And to obtain a lighting device capable of improving the color rendering properties. また、導光板の真下方向に照射される光の方向を外側に変化させることができる照明器具を得ることを目的とする。 Further, an object is to obtain a luminaire in the direction of light irradiated beneath a direction of the light guide plate can be changed to the outside. さらに、配線工事を不要にすることができる照明器具を得ることを目的とする。 Further, an object is to obtain a lighting apparatus which can eliminate the need for wiring work.

【0007】 [0007]

【課題を解決するための手段】本発明は、複数のLED Means for Solving the Problems The present invention, a plurality of LED
を有しこのLEDの直下に中空の導光板を設け、導光板の中心軸に沿ってこの導光板を支持する支柱を設けた照明器具であって、導光板の導光部の内側表面に拡散反射特性と拡散透過特性を有する拡散層を形成すると共に支柱の表面に拡散反射層を形成し、導光部の上側端面に沿ってLEDを配設した。 The has a hollow light guide plate disposed immediately below the LED, along the center axis of the light guide plate to a luminaire provided with a support column for supporting the light guide plate, diffusion to the inner surface of the light guiding portion of the light guide plate to form a diffusion layer having a reflection characteristic and diffuse transmission characteristic to form a diffuse reflection layer on the surface of the strut, the LED is disposed along the upper end surface of the light guide portion.

【0008】また、径の異なる複数の中空筒状の導光部からなる導光板を備え、これらの導光板を同心的に配設した。 [0008] comprising a plurality of different hollow cylindrical made of a conductive light unit light guide plate diameters were provided with these light guide plate concentrically. さらに、各導光部にそれぞれ色の異なるLEDを配設した。 Furthermore, they were provided with different LED of colors to each light guide section. また、下側端面を傾斜させてその傾斜面が外側下方に向くようにした導光部を備えた。 Further, the inclined surface is provided with a light guiding portion which is to face outwardly downwardly is inclined lower end surface. さらに、電源として電池を用いた。 Furthermore, using a battery as a power source. また、電源として、太陽電池と該太陽電池により充電された2次電池とを用いた。 Further, as a power source, and using a secondary battery that is charged by the solar cell and the solar cell.

【0009】 [0009]

【発明の実施の形態】実施の形態1 図1は本発明の実施の形態1の縦断面図、図2は図1の斜視図、図3は図1の要部の分解斜視図である。 Longitudinal sectional view of a first embodiment of the DETAILED DESCRIPTION OF THE INVENTION First Embodiment FIG. 1 the invention, FIG 2 is a perspective view of FIG. 1, FIG. 3 is an exploded perspective view of a main part of FIG. 1は導光部1aを有する中空円筒状の導光板で、導光部1aの内側表面に、拡散反射特性と拡散透過特性を同時に有し例えば拡散反射率が50%で拡散透過率が40%の拡散処理を施した拡散層2を形成し、導光部1aの上側端面3及び下側端面4は平滑で導光板1の軸方向と直交させて水平に形成してある。 1 is a hollow cylindrical light guide having a light guide portion 1a, the inner surface of the light guide portion 1a, at the same time has a diffusion reflectance diffuse transmission characteristic and diffuse reflection characteristics is diffuse transmittance of 50% 40% diffusion process to form a diffusion layer 2 subjected to the upper end surface 3 and the lower end face 4 of the light guide part 1a is are horizontally formed by perpendicular to the axial direction of the light guide plate 1 with smooth.

【0010】5は導光板1の中心軸に沿って配設された中空の支柱である。 [0010] 5 is a hollow strut which is disposed along the central axis of the light guide plate 1. 6は導光部1aの拡散層2に空間部7を介して対向し、支柱5の外側表面に形成されその中心軸が導光板1の中心軸とほぼ一致する反射層で、光をこの反射層6によって反射させて導光板1から外部に放射する光束が増えるようにしてある。 6 face each other with a space 7 in the diffusion layer 2 of the light guide section 1a, a reflective layer a central axis is formed on the outer surface of the support 5 is substantially coincident with the central axis of the light guide plate 1, the reflection light It is as light beams emitted outside from the light guide plate 1 is reflected is increased by the layer 6. 8は導光板1の導光部1aの上側端面3に近接してその上部全周に沿って円形状に配設された複数のLED、9はLED8を電気的機械的に結合している基板である。 8 multiple LED, 9 arranged in a circular shape along its upper entire circumference in proximity to the upper end surface 3 of the light guide portion 1a of the light guide plate 1 is electrically and mechanically coupled to LED8 substrate it is. 10は導光板1の上側に位置し基板9の上方と側方を覆って基板9を支持するケースで、支柱5の上端部に固定されている。 10 is a case for supporting the substrate 9 covering the upper and side of the substrate 9 is located on the upper side of the light guide plate 1 is fixed to the upper end portion of the strut 5. 11 11
は支柱5の内部に配設された電源である。 Is a power source disposed within the strut 5.

【0011】上記のように構成した実施の形態1の作用を説明する。 [0011] explaining the operation of the first embodiment configured as described above. LED8から導光板1の導光部1aの上側端面3を通って導光部1a内に入射した光は、導光部1 The light incident on the light guide portion 1a through the upper end surface 3 of the light guide portion 1a of the light guide plate 1 from LED8 are light guide section 1
a内を下側端面4に向かって進行する。 Within a traveling toward the lower end surface 4. この光のうち、 Of this light,
図4に示すように、導光部1a内を全反射を繰り返して下方向に向かって進む光Aは、下側端面4から出て、導光板1の内側方向に向かって進む。 As shown in FIG. 4, the light A traveling downwardly by repeating total reflection inside the light guide portion 1a is out of the lower end surface 4, it proceeds toward the inside direction of the light guide plate 1. 一方、導光板軸に対して光Aと対称な位置関係で導光板1の導光部1a内を全反射を繰り返して下方向に向かって進む光Bは、下側端面4から出て、導光板1の外側方向に向かって進む。 On the other hand, light B traveling downwardly light A and a position symmetrical light guide plate 1 of the light guide portion 1a in relation repeats total reflection with respect to the light guide plate axis, out from the lower end surface 4, guide proceeds toward the outside direction of the light guide plate 1.

【0012】また、導光部1aの上側端面3から入射した光のうち拡散層2に到達することなく進行する光は、 Further, light traveling without reaching the diffusion layer 2 of the light incident from the upper end surface 3 of the light guide part 1a is
導光部1aの軸方向下部に向かって全反射しながら進み、下側端面4から導光板軸に対してほぼ対称になって抜け出て、下方に放射されて足元部を照射する。 Proceeds while being totally reflected towards the axial direction lower part of the light guide part 1a, exits almost symmetrical with respect to the light guide plate axis from the lower end face 4, it is radiated downward illuminating the feet of. 一方、 on the other hand,
導光部1aの内側表面に形成した拡散層2に到達した光は、前述のように、ここで全反射がくずれて、一部は導光部1aの外側表面に向かい、一部は導光部1aの内側表面に向かう。 Light reaching the diffusion layer 2 formed on the inner surface of the light guide portion 1a, as described above, wherein the total reflection collapses, partially toward the outer surface of the light guide portion 1a, some light toward the inner surface of the section 1a.

【0013】内側表面側に進行した光は拡散層2を通過して空間部7を通り、支柱5の外側表面に形成した反射層6に到達してこの反射面で反射し、再び空間部7を通って導光部1a方向に向かう。 [0013] Light that has traveled on the inner surface side through a space portion 7 through the diffusion layer 2, and reaches the reflective layer 6 formed on the outer surface of the support 5 is reflected by the reflecting surface, again space 7 the directed to the light guide portion 1a direction through. この光のうち拡散層2の拡散透過率に見合った分が導光部1a内に入って、導光部1aの外側表面に向かい、その一部が導電部1aを透過して器具外に放射される。 Min commensurate with the diffuse transmittance of the diffusion layer 2 of the light enters the light guide section 1a, toward the outer surface of the light guide portion 1a, the radiation outside the instrument passes through a portion of the conductive portion 1a It is. 他の一部は外側表面で反射し、導光部1a、空間部7を通って反射層6に向かって進み、反射層6で反射されて、再び空間部7を通って導光部1aに入射する。 Other partially reflected by the outer surface, the light guide portion 1a, travels toward the reflective layer 6 through the space portion 7, is reflected by the reflecting layer 6, the light guide portion 1a through the space portion 7 again incident. この作用を繰り返して、拡散層2 Repeat this effect, the diffusion layer 2
と導光部1aに吸収される光以外は器具外に放射される。 Other than the light that is absorbed by the light guide part 1a and is radiated to the outside of the instrument.

【0014】実施の形態1によれば、導光板1が円筒形であるため、導光板1の側面から放射される水平方向の光の強さがほぼ均一で、方向性に偏りがない。 According to the first embodiment, the light guide plate 1 for a cylindrical, the strength of the horizontal direction of the light emitted from the side surface of the light guide plate 1 is substantially uniform, there is no bias in the direction. また、導光板1の下側端面4から放射される光によって足元を照明することもできる。 It is also possible to illuminate the feet by the light emitted from the lower end surface 4 of the light guide plate 1. さらに、LED8の数を増やすことによって、明るさを大きくすることができる。 Furthermore, by increasing the number of LED 8, it is possible to increase the brightness.

【0015】実施の形態2 図5は本発明の実施の形態2の縦断面図、図6は図5の斜視図、図7は図5の要部の分解斜視図である。 The longitudinal sectional view of Embodiment 2 Embodiment 2 Figure 5 present invention, FIG. 6 is a perspective view of FIG. 5, FIG. 7 is an exploded perspective view of a main part of FIG. 実施の形態1では、中空筒状の1個の導光部1aからなる導光板1を用いて照明器具を構成したが、実施の形態2では、径の異なる複数の導光部からなる導光板を用いて照明装置を構成したものである。 In the first embodiment, to constitute a lighting fixture using a light guide plate 1 made of a hollow cylindrical one light guide portion 1a, in the second embodiment, a light guide plate comprising a plurality of light guide sections having different diameters it is obtained by constituting the lighting apparatus used.

【0016】1は直径が異なる例えば3種類からなる中空円筒状の第1、第2、第3の導光部1a,1b,1c [0016] 1 first hollow cylindrical made of different example three diameters, second, third light guide section 1a, 1b, 1c
を有する導光板で、これらの導光部1a,1b,1cのそれぞれの中心軸が一致するようにして同心円状に配設してあり、それぞれの導光部1a,1b,1cの各々の上側端面3a,3b,3c及び下側端面4a,4b,4 In the light guide plate having, these light guide section 1a, 1b, as the respective center axes of 1c coincides Yes be disposed concentrically, each of the light guide section 1a, 1b, the upper of each 1c the end surface 3a, 3b, 3c and lower end surfaces 4a, 4b, 4
cは平滑で導光板1の軸方向と直交させて水平に形成してある。 c is are horizontally formed by perpendicular to the axial direction of the light guide plate 1 with smooth. 2a,2b,2cはそれぞれ第1、第2、第3 2a, 2b, the first respectively 2c, second, third
の導光部1a,1b,1cの内側表面に、拡散反射特性と拡散透過特性を同時に有する拡散処理を施した第1、 Light guide section 1a, 1b, the inner surface of 1c, first subjected to spreading processing with a diffuse transmission characteristic and diffuse reflection characteristics at the same time,
第2、第3の拡散層で、例えば拡散反射率が50%で拡散透過率が40%の拡散処理を施してある。 Second, the third diffusion layer, for example, diffuse reflectance is diffuse transmittance of 50% are subjected to 40% of the diffusion process.

【0017】5は導光板1の中心軸に沿って配設された中空の支柱である。 [0017] 5 is a hollow strut which is disposed along the central axis of the light guide plate 1. 6は第3の導光部1cの拡散層2c 6 the diffusion layer 2c of the third light guide section 1c
に対向し、支柱5の外側表面に形成されてその中心軸が導光板1の中心軸とほぼ一致する反射層で、光をこの反射層6によって反射して導光板1から外部に放射する光束が増えるようにしてある。 Opposed to, a reflective layer the central axis are formed on the outer surface of the support 5 is substantially coincident with the central axis of the light guide plate 1, the light flux emitted outside from the light guide plate 1 by reflecting light by the reflecting layer 6 It is as increases.

【0018】8a,8b,8cはそれぞれ導光板1の第1、第2、第3の導光部1a,1b,1cの上側端面3 [0018] 8a, 8b, first each 8c light guide plate 1, second, third light guide section 1a, 1b, 1c upper end surface 3 of the
a,3b,3cに近接してそれらの上部全周に沿って円形状に配設された同色で複数からなる第1、第2、第3 a, 3b, first comprising a plurality of the same color arranged in a circular shape along the entire circumference thereof at the top close to 3c, second, third
のLED、9は第1、第2、第3のLED8a,8b, Is the LED, 9 first, second, third LED 8a, 8b,
8cを電気的機械的に結合している基板である。 8c which is a substrate that is electrically and mechanically coupled. 10は導光板1の上側に位置し基板9の上方と側方を覆って基板9を支持するケースで、支柱5の上端部に固定されている。 10 is a case for supporting the substrate 9 covering the upper and side of the substrate 9 is located on the upper side of the light guide plate 1 is fixed to the upper end portion of the strut 5. 11は支柱5の内部に配設された電源である。 11 is a power source disposed within the strut 5.

【0019】上記のように構成した実施の形態2の作用を説明する。 [0019] explaining the operation of the second embodiment configured as described above. 第1、第2、第3のLED8a,8b,8 First, second, third LED 8a, 8b, 8
cからそれぞれ第1、第2、第3の導光部1a,1b, First from each c, second, third light guide section 1a, 1b,
1cの上側端面3a,3b,3cを通って第1、第2、 First, second through 1c of the upper end surface 3a, 3b, and 3c,
第3の導光部1a,1b,1c内に入射した光の挙動は、実施の形態1の図4に示した場合と同様なのでその説明は省略し、ここでは、第1、第2、第3の導光部1 Behavior of the third light guide section 1a, 1b, the light incident on the 1c is the same as the case shown in FIG. 4 of the first embodiment and description thereof is omitted, here, first, second, 3 of the light guide portion 1
a,1b,1cの外側表面、内側表面から放射される光について説明する。 a, 1b, the outer surface of 1c, the light emitted from the inner surface will be described.

【0020】まず、第1の導光部1aの外側表面から出た光はそのまま器具外に放射されるが、第2の導光部1 [0020] First, the light emitted from the outer surface of the first light guide portion 1a is directly radiated to the outside of the instrument, the second light guide section 1
bの外側表面から出た光は第1の空間部7aを介して第1の導光部1aを拡散透過し、また、第3の導光部1c Light emitted from the outer surface of the b diffuses through the first light guide portion 1a through the first space portion 7a, also, the third light guide section 1c
の外側表面から出た光は第2、第1の空間部7b,7a The light emitted from the outer surface of the second, the first space portion 7b, 7a
を介して第2の導光部1bと第1の導光部1aを拡散透過する。 It diffuses and transmits the second light guide section 1b and the first light guide portion 1a through.

【0021】一方、第1の導光部1aの内側表面から出た光は、第1の空間部7aを通って第2の導光部1bに至り、ここを拡散透過して第2の空間部7bを通り第3 Meanwhile, light emitted from the inner surface of the first light guide portion 1a passes through the first space portion 7a reaches the second light guide section 1b, the second space by diffusing transmitted here as a part 7b third
の導光部1cに至り、ここを拡散透過して支柱5に形成した拡散反射層6で反射し、その後、先と逆の行程を経て拡散透過し、最後に第1の導光部1aから器具外に放射される。 Of reach the optical portion 1c guide, and diffusely transmitted here is reflected by the diffuse reflection layer 6 formed on the support 5, then diffuse transmission through the stroke of the former opposite from the end to the first light guide section 1a It is emitted to the outside of the instrument.

【0022】また、第2の導光部1bの内側表面から出た光は、第2の空間部7bを通って第3の導光部1cに至り、ここを拡散透過して支柱5に形成した拡散反射層6で反射し、その後、再び、第3の導光部1cから第2 Further, light emitted from the inner surface of the second light guide portion 1b passes through the second space portion 7b reaches the third light guide section 1c, formed in the support 5 by diffuse transmission here reflected by the diffuse reflection layer 6 was then again, the second from the third light guide section 1c
の空間部7bを通って第2の導光部1bに至り、ここを拡散透過して第1の空間部7aから第1の導光部1aに至り、ここを拡散透過して器具外に放射される。 Of through the space portion 7b reaches the second light guide section 1b, reaches the first space portion 7a to diffuse and transmit here first light guide section 1a, the radiation outside the device to diffuse and transmit here It is.

【0023】さらに、第3の導光部1cの内側表面から出た光は支柱5に形成した拡散反射層6で反射し、第3 Furthermore, light emitted from the inner surface of the third light guide section 1c is reflected by the diffuse reflection layer 6 formed on the support 5, the third
の導光部1cから第2の空間部7bを通って第2の導光部1bに至り、ここを拡散透過して第1の空間部7aから第1の導光部1aに至り、ここを拡散透過して器具外に放射される。 From the light guide portion 1c through the second space portion 7b reaches the second light guide section 1b, it reaches the first space portion 7a to diffuse and transmit here first light guide section 1a, here diffuse transmission to be emitted to the outside of the instrument. なお、上記の説明では第1、第2、第3 In the above description first, second, third
のLED8a,8b,8cは同色にしたが、第1、第2、第3のLED8a,8b,8cごとに異なる光色にして、演色性を向上させるようにしてもよい。 The LED 8a, 8b, 8c has been the same color, the first, second, third LED 8a, 8b, and the different light colors for each 8c, may be to improve the color rendering properties.

【0024】実施の形態2によれば、発光面輝度と器具設置面となる地表の足元部の水平面照度を高めることができる。 According to the second embodiment, it is possible to increase the horizontal illuminance of the surface of the foot portion as an emission surface brightness and the instrument installation surface. すなわち、3種類の第1、第2、第3の導光部1a,1b,1cをそれぞれの中心軸が一致するように配置し、これらの各上側端面3a,3b,3cの全周に複数の第1、第2、第3のLED8a,8b,8cを配設したので、光源となるLEDの数が増えて全体の光束量が増え、最外殻となる第1の導光部1aの発光面輝度が上がり、同時に第1、第2、第3の導光部1a,1 That is, the first three, second, third light guide section 1a, 1b, arranged 1c the as respective center axes coincide, a plurality each of these upper end surface 3a, 3b, the entire circumference of 3c first, second, third LED 8a, 8b, since the disposed 8c of the whole growing number of LED as a light source luminous flux is increased, the first light guide portion 1a serving as the outermost shell emission surface brightness is increased, at the same time the first, second, third light guide section 1a, 1
b,1cの下側端面4a,4b,4cから器具外に放射される光束量が増え、器具足元部の照度が上がる。 b, the lower end surface 4a of 1c, 4b, 4c increased amount of light flux emitted to the outside of the instrument from increased illuminance of the instrument foot portion.

【0025】このとき、第1、第2、第3の導光部1 [0025] In this case, first, second, third light guide section 1
a,1b,1cの上部近傍に配設された第1、第2、第3のLED8a,8b,8cの色をそれぞれ変えることによって、器具外から見える発光面および器具の足元部分の光色を変えることができる。 a, 1b, the first arranged near the top of 1c, second, third LED 8a, 8b, by changing 8c colors respectively, the light color of the foot portion of the light emitting surface and appliances visible from the outside of the instrument it is possible to change.

【0026】実施の形態3 図8は本発明の実施の形態3の縦断面図、図9は図8の要部の分解斜視図である。 The longitudinal sectional view of Embodiment 3 of Embodiment 3 Figure 8 invention embodiment, FIG. 9 is an exploded perspective view of a main part of FIG. 実施の形態1では、導光板1 In the first embodiment, the light guide plate 1
の形状を中空円筒状にし、上側端面3と下側端面4は平滑で導光板1の軸方向と直交させ、導光板1の外側には何も設けていないが、実施の形態3では、導光板1の形状を中空角形とし、導光板1の下側端面を外方下方に向くように傾斜させ、導光板1の外側に保護層を設けたものである。 The shape into a hollow cylindrical shape, the upper end surface 3 and the lower end face 4 is orthogonal to the axial direction of the light guide plate 1 in smooth, on the outside of the light guide plate 1 is not provided any, in the third embodiment, guide the shape of the light guide plate 1 is a hollow square, is inclined to face the lower end surface of the light guide plate 1 to the outer lower, is provided with a protective layer on the outside of the light guide plate 1.

【0027】1は中空の四角形状に形成した導光板で、 [0027] 1 a hollow square shape in the formed light guide plate,
その導光部1aの下側端面4dを平滑で導光板1の軸方向に対して傾斜させて形成してある。 Its lower end surface 4d of the light guide part 1a is formed to be inclined with respect to the axial direction of the light guide plate 1 with smooth. より詳しくは、導光部1aの下側端面4dの傾斜面と導光板1の中心軸とが、上方に向かってなす角度が鋭角を形成して、傾斜面が外側下方に向くようにしてある。 More specifically, the central axis of the inclined surface and the light guide plate 1 of the lower end surface 4d of the light guide portion 1a, the angle formed upward to form an acute angle, the inclined surface is to be facing outwardly downwardly . 12は導光板1の導光部1aの外側に設けた導光板1よりやや大きい透明な中空で四角形状の保護層で、導光板1の導光部1aに密着しないようにして設けてある。 12 is a rectangular protective layer a little larger transparent hollow than the light guide plate 1 provided outside of the light guide portion 1a of the light guide plate 1, it is provided so as not in close contact with the light guide portion 1a of the light guide plate 1. その他の構成は、実施の形態1で示した場合と同様なので、説明を省略する。 Other configurations are the same as the case shown in Embodiment 1, the description thereof is omitted.

【0028】上記のように構成した実施の形態3の作用を説明する。 [0028] explaining the operation of the third embodiment configured as described above. LED8から導光板1の導光部1aの上側端面3を通って導光部1aに入射し、導光部1a内を全反射によって進行した光は、下側端面4dに到達したときに全反射がくずれ、導光部1a外に放射される。 Enters the light guide section 1a through the upper end surface 3 of the light guide portion 1a of the light guide plate 1 from the LED 8, the light that has traveled by total reflection within the light guide portion 1a is totally reflected when it reaches the lower end face 4d is lost, it is radiated out of the light guide section 1a. すなわち、図10に示すように、導光部1a内を全反射によって下方向に向かって進む光Aは、外側下方に傾斜した下側端面4dから出て、導光板1の外側下方に向かって進む。 That is, as shown in FIG. 10, the light A traveling downward direction by total reflection within the light guide portion 1a is out of the lower end surface 4d that is inclined outwardly downward, downward toward the outside of the light guide plate 1 move on.

【0029】一方、導光板軸に対して光Aと対称な位置関係で導光部1a内を下方向に向かって進む光Bは、下側端面4dから出て、光Aと同方向すなわち導光板1の外側方向に向かって進む。 On the other hand, light B which proceeds toward the light guide portion 1a downwardly in a positional relationship of the light A and the symmetry with respect to the light guide plate shaft exits the lower end surface 4d, the light A in the same direction, that is electrically proceeds toward the outside direction of the light guide plate 1. このため、導光部1aの下側端面4dから導光板1外に出る光は、導光板軸に対して外側の下方向に集中する。 Thus, light exiting the lower light guide plate 1 out of the end face 4d of the light guide part 1a is concentrated down the outside with respect to the light guide plate axis. その他の作用は、実施の形態1で示した場合と同様なので、説明を省略する。 The other actions are the same as the case shown in Embodiment 1, the description thereof is omitted.

【0030】実施の形態3によれば、下側端面4dを導光部1aの軸方向と直交させて形成した実施の形態1の場合と比べて、器具外側方向に向かう光の成分が多くなり、照射される地表面の面積が増大する。 According to the third embodiment, as compared with the case of the lower embodiment formed by perpendicular to the axial direction of the end face 4d light guide portion 1a 1, it becomes large component of the light toward the instrument outward direction , the area of ​​the ground surface to be irradiated increases. また、保護層12は、導光板1の外周面を保護しているので、導光板1の外表面が傷が付くことがなく、このため、傷付いた場所で全反射がくずれて光が漏れたり、その場所の輝度が上がって不均一な配光になるということもない。 Further, the protective layer 12, so protecting the outer peripheral surface of the light guide plate 1, the outer surface of the light guide plate 1 without scratching, Therefore, the light leaks collapse total reflection at a location scratched or, nor the fact that the brightness of the place becomes non-uniform light distribution up.

【0031】実施の形態4 図11は本発明の実施の形態4の斜視図、図12は図1 [0031] Embodiment 4 FIG. 11 embodiment is a perspective view of a fourth embodiment of the present invention, FIG. 12 FIG. 1
1の要部の斜視図である。 It is a perspective view of one of the main part. 13は導光板1の上部に取り付けた太陽電池で、この太陽電池1によって充電される2次電池(図示せず)を設け、配電工事を不要化するようにしてある。 13 is a solar cell mounted on top of the light guide plate 1, a secondary battery (not shown) which is charged by the solar cell 1 is provided, it is to be required of the power distribution work. 1は中空円筒形の導光板で、2つに分割された第1の導光板1dと第2の導光板1eの2部分からなっている。 1 is a hollow cylinder of the light guide plate, the first light guide plate 1d divided into two and has two portions of the second light guide plate 1e. その他の構成は、実施の形態1で示した場合と同様なので、説明を省略する。 Other configurations are the same as the case shown in Embodiment 1, the description thereof is omitted.

【0032】上記のように構成した実施の形態4の作用を説明する。 [0032] explaining the operation of the fourth embodiment configured as described above. 光源として使用するLED8は、直流駆動であるため、昼間、太陽電池13によって充電された二次電池からの出力によって直接点灯する。 Used as the light source LED8 are the direct current drive, Day, it turned directly by the output from the secondary battery charged by the solar cell 13. 実施の形態4 Embodiment 4
によれば、LED8は直流電流を流したときに点灯するが、太陽電池の発電エネルギーも直流であるため、他の電源から給電する必要がなく、このために電源工事なしに単独で器具の設置を行うことができる。 According to, LED 8 is lit when a direct current flows, for generating energy in solar cells is a direct current, there is no need to supply power from other power supply, installation alone instrument for this without supply construction It can be performed.

【0033】 [0033]

【発明の効果】以上の説明から明らかなように、本発明は、複数のLEDを有しこのLEDの直下に中空の導光板を設け、導光板の中心軸沿ってこの導光板を支持する支柱を設けた照明器具であって、導光板の導光部の内側表面に拡散反射特性と拡散透過特性を有する拡散層を形成すると共に支柱の表面に拡散反射層を形成し、導光部の上側端面に沿ってLEDを配設したので、発光面輝度と水平面方向の配光を均一化することができると共に、 As apparent from the above description, the present invention provides a hollow light guide plate disposed immediately below the LED has a plurality of LED, supports for the light guide plate along the central axis of the light guide plate a luminaire provided with a diffuse reflection layer on the surface of the strut to form a diffusion layer is formed having a diffuse reflection characteristics and diffuse transmission characteristics on the inner surface of the light guiding portion of the light guide plate, the upper light guide section Having arranged the LED along the end face, it is possible to uniform the light distribution of the light emission surface brightness and the horizontal plane direction,
足元の水平面照度を確保することができる。 It is possible to ensure the horizontal plane illumination of the feet.

【0034】また、径の異なる複数の中空筒状の導光部からなる導光板を備え、これらの導光板を同心的に配設したので、発光面輝度と足元部の水平面照度を高めることができる。 Further, with a plurality of different hollow cylindrical made of a conductive light unit light guide plate diameters, since these light guide plates were concentrically arranged, to increase the horizontal illuminance of the light emitting surface brightness and foot portion it can. さらに、各導光部にそれぞれ色の異なるL Furthermore, different L of colors to each light guide section
EDを配設したので、演色性を改善することができる。 Having disposed ED, it is possible to improve the color rendering properties.

【0035】また、下側端面を傾斜させてその傾斜面が外側下方に向くようにした導光部を備えたので、導光板の下方向に照射される光を外側方向に変化させることができる。 Further, it is possible to change because the inclined surface is inclined lower end face is provided with a light guiding portion which is to face outwardly downwardly, the light emitted downward of the light guide plate in an outward direction . さらに、電源として電池を用いたので、配線工事を不要にすることができる。 Further, since using a battery as a power source, it is possible to dispense with wiring work. また、電源として、太陽電池とこの太陽電池により充電された2次電池とを用いたので、配線工事を不要にすることができる。 Further, as the power supply, since using a secondary battery that is charged by the solar cell and a solar cell, it is possible to dispense with wiring work.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】 本発明の実施の形態1の縦断面図である。 1 is a longitudinal sectional view of a first embodiment of the present invention.

【図2】 図1の斜視図である。 Is a perspective view of FIG. 1. FIG.

【図3】 図1の要部の分解斜視図である。 3 is an exploded perspective view of a main part of FIG.

【図4】 図1の作用説明図である。 4 is an explanatory diagram of the operation of FIG.

【図5】 本発明の実施の形態2の縦断面図である。 5 is a longitudinal sectional view of a second embodiment of the present invention.

【図6】 図5の斜視図である。 6 is a perspective view of FIG.

【図7】 図5の要部の分解斜視図である。 7 is an exploded perspective view of a main part of FIG.

【図8】 本発明の実施の形態3の縦断面図である。 8 is a longitudinal sectional view of a third embodiment of the present invention.

【図9】 図8の要部の分解斜視図である。 Is an exploded perspective view of a main part of FIG. 8;

【図10】 図5の作用説明図である。 Is an explanatory diagram of the operation of FIG. 10] FIG. 5.

【図11】 本発明の実施の形態4の斜視図である。 11 is a perspective view of a fourth embodiment of the present invention.

【図12】 図11の要部の斜視図である。 Is a perspective view of a main part of FIG. 12 FIG. 11.

【図13】 従来の表示灯の一例を示す一部を切断した斜視図である。 13 is a perspective view partially cut away showing an example of a conventional display light.

【図14】 従来の表示照明器具の一例を示す断面図である。 14 is a sectional view showing an example of a conventional display luminaire.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 導光板、1a,1b,1c 導光部、2,2a,2 1 the light guide plate, 1a, 1b, 1c the light guide portion, 2, 2a, 2
b,2c 拡散層、3,3a,3b,3c 上側端面、 b, 2c diffusion layer, 3, 3a, 3b, 3c the upper end surface,
4,4a,4b,4c,4d 下側端面、5支柱、8, 4, 4a, 4b, 4c, 4d lower end face, 5 posts 8,
8a,8b,8c LED、11 電池。 8a, 8b, 8c LED, 11 batteries.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 明道 成 神奈川県鎌倉市大船五丁目1番1号 三菱 電機照明株式会社内 (72)発明者 北村 恵美子 神奈川県鎌倉市大船五丁目1番1号 三菱 電機照明株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor of Adventure formed Kamakura, Kanagawa Prefecture Ofuna chome No. 1 No. 1 Mitsubishi electric lighting Co., Ltd. in the (72) inventor Emiko Kitamura Kamakura, Kanagawa Prefecture Ofuna chome No. 1 No. 1 Mitsubishi electric lighting Co., Ltd. in

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 複数のLEDを有し該LEDの直下に中空の導光板を設け、該導光板の中心軸に沿って該導光板を支持する支柱を設けた照明器具であって、 前記導光板の導光部の内側表面に拡散反射特性と拡散透過特性を有する拡散層を形成すると共に前記支柱の表面に拡散反射層を形成し、前記導光部の上側端面に沿って前記LEDを配設したことを特徴とする照明器具。 1. A hollow light guide plate disposed immediately below the said LED has a plurality of LED, a lighting fixture provided with supports for the light guide plate along the central axis of the light guide plate, said guide forming a diffuse reflection layer on the surface of the strut to form a diffusion layer having the diffuse reflection characteristics as diffuse transmission characteristics on the inner surface of the light guiding portion of the light plate, distribution of the LED along the upper end surface of the light guide portion luminaire, characterized in that the set.
  2. 【請求項2】 径の異なる複数の中空筒状の導光部からなる導光板を備え、これら導光板を同心的に配設したことを特徴とする請求項1記載の照明器具。 2. A comprising a plurality of different hollow cylindrical made of a conductive light unit light guide plate diameters, lighting equipment according to claim 1, characterized in that these light guide plates were concentrically arranged.
  3. 【請求項3】 各導光部にそれぞれ色の異なるLEDを配設したことを特徴とする請求項2記載の照明器具。 3. A luminaire according to claim 2, characterized in that arranged different LED of colors to each light guide section.
  4. 【請求項4】 下側端面を傾斜させてその傾斜面が外側下方に向くようにした導光部を備えたことを特徴とする請求項1〜3のいずれかに記載の照明器具。 4. A lighting device according to any of claims 1 to 3, characterized in that the inclined surface is inclined lower end face is provided with a light guiding portion which is to face outwardly downwardly.
  5. 【請求項5】 電源として電池を用いたことを特徴とする請求項1〜4のいずれかに記載の照明器具。 5. A luminaire according to claim 1, characterized by using a battery as a power source.
  6. 【請求項6】 電源として、太陽電池と該太陽電池により充電された2次電池とを用いたことを特徴とする請求項5記載の照明器具。 As 6. power, lighting equipment according to claim 5, characterized by using a secondary battery that is charged by the solar cell and the solar cell.
JP01253798A 1998-01-26 1998-01-26 lighting equipment Expired - Lifetime JP3817665B2 (en)

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JP2009070589A (en) * 2007-09-11 2009-04-02 Hitachi Ltd Liquid crystal display apparatus
DE202009006261U1 (en) * 2009-04-29 2010-09-16 Zumtobel Lighting Gmbh LED light
JP2011070808A (en) * 2009-09-24 2011-04-07 Stanley Electric Co Ltd Lighting apparatus
JP2013125658A (en) * 2011-12-14 2013-06-24 Stanley Electric Co Ltd Led lighting device
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US8632196B2 (en) 2010-03-03 2014-01-21 Cree, Inc. LED lamp incorporating remote phosphor and diffuser with heat dissipation features
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US8882284B2 (en) 2010-03-03 2014-11-11 Cree, Inc. LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties
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US9024517B2 (en) 2010-03-03 2015-05-05 Cree, Inc. LED lamp with remote phosphor and diffuser configuration utilizing red emitters
US9057511B2 (en) 2010-03-03 2015-06-16 Cree, Inc. High efficiency solid state lamp and bulb
US8632196B2 (en) 2010-03-03 2014-01-21 Cree, Inc. LED lamp incorporating remote phosphor and diffuser with heat dissipation features
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US9062830B2 (en) 2010-03-03 2015-06-23 Cree, Inc. High efficiency solid state lamp and bulb
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