WO2011055527A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2011055527A1
WO2011055527A1 PCT/JP2010/006446 JP2010006446W WO2011055527A1 WO 2011055527 A1 WO2011055527 A1 WO 2011055527A1 JP 2010006446 W JP2010006446 W JP 2010006446W WO 2011055527 A1 WO2011055527 A1 WO 2011055527A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
light
leds
lighting device
Prior art date
Application number
PCT/JP2010/006446
Other languages
English (en)
Japanese (ja)
Inventor
修 吉村
達也 植田
小野　陽二
Original Assignee
株式会社クラレ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社クラレ filed Critical 株式会社クラレ
Priority to CN201080050032.2A priority Critical patent/CN102667308B/zh
Priority to JP2011539283A priority patent/JP5507577B2/ja
Publication of WO2011055527A1 publication Critical patent/WO2011055527A1/fr

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Classifications

    • 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
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • 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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device used by being attached to an indoor ceiling or the like.
  • incandescent bulbs, fluorescent lamps, etc. have been used as lighting to be mounted on the ceiling.
  • incandescent bulbs are considered to have problems in terms of energy utilization efficiency and life.
  • the fluorescent lamp is excellent in energy efficiency, it is considered that there is a problem in that harmful mercury is used and in terms of life.
  • Patent Document 1 proposes an illumination device that substitutes for a fluorescent lamp using LEDs.
  • an LED In the illumination device of the form shown in Patent Document 1, it is possible to attach an LED to a general fluorescent lamp fixture (socket) while using an LED as a light source.
  • this lighting device has problems such as narrow light diffusion characteristics and dazzling when looking directly at the light source.
  • a countermeasure such as providing a diffusion plate or a lens on the emission side of the LED illumination can be considered.
  • the use of a diffuser plate reduces the light use efficiency due to light scattering and reflection, and the use of a lens raises the cost because it is necessary to install a lens for each LED.
  • an object of the present invention is to provide an illuminating device having good light diffusion characteristics and less glare when directly viewed, in addition to the advantages of the LED, by using the LED.
  • An aspect of the illumination device of the present invention that solves the above problems includes a light guide plate that emits light incident from an end surface from a main surface, a plurality of LEDs provided on the end surface, and the light guide plate and the plurality of LEDs. And a power source terminal for the plurality of LEDs.
  • the length L (cm) of the light guide plate in the light guide direction and the width W (cm) of the light guide plate orthogonal to the light guide direction and the thickness direction of the light guide plate are W / L ⁇ 10.
  • the number of the plurality of LEDs is (W / L) / 2 (number) or more.
  • the power supply terminal is a lighting device provided at at least one end corresponding to the width direction of the light guide plate among the ends of the frame.
  • the illumination device according to the present invention diffuses light emitted from a plurality of LEDs using a light guide plate. By using the light guide plate and the plurality of LEDs described above, the light diffusibility is improved and glare is suppressed.
  • the thickness of the light guide plate is preferably constant, and particularly preferably 2 mm to 30 mm. Moreover, it is preferable that the main surface and end surface of the light guide plate are mirror surfaces and contain a light diffusing material therein, and the difference between the refractive index of the light diffusing material and the refractive index of the base material of the light guide plate is 0. It is preferably 4 or more. Further, the volume average particle diameter of the light diffusing material is preferably 0.5 to 5 ⁇ m, and the concentration is preferably 0.0001 to 0.003 mass%.
  • the illumination device of the present invention can be used in place of a straight tube fluorescent lamp.
  • the illuminating device of the present invention is of a light guide system, it has a wide light diffusion characteristic similar to that of a conventional fluorescent lamp, is not dazzling even when viewed directly, and can be used similarly to a conventional fluorescent lamp.
  • FIG. 2A is a schematic cross-sectional view of the illuminating device of FIG. 2A cut along a III-III plane perpendicular to the main surface and parallel to the light guide direction.
  • FIG. 2A is the schematic which shows the optical property measuring method of this invention and a comparative example. It is a figure which shows the optical characteristic of this invention and a comparative example.
  • the illumination device 1 of the present invention includes a light guide plate 2 having scattering elements, a plurality of LEDs 3, a light guide plate 2 and a frame 4 that houses the plurality of LEDs 3, a power supply terminal 5 of the plurality of LEDs 3, and a power supply device 6.
  • the light guide plate 2 is a plate-like material as an example.
  • the size of the light guide plate 2 is specified from the thickness T (cm), the length L (cm) in the light guide direction, and the width W (cm).
  • the thickness (thickness direction), the length in the light guide direction (light guide direction), and the width (width direction) are orthogonal to each other.
  • the thickness T is not shown in FIG.
  • Two end surfaces that form the light guide plate 2 and that are parallel to the light guide direction and the width direction that is, two end surfaces that are formed by the light guide direction and the width direction, are main surfaces.
  • a main surface that emits the guided light is an emission-side main surface, and the other is an anti-emission-side main surface.
  • the distance between the exit-side main surface and the counter-exit-side main surface corresponds to the thickness.
  • the width direction is orthogonal to the light guide direction and the thickness direction. In other words, it is orthogonal to the surface formed by the light guide direction and the thickness direction.
  • the plurality of LEDs 3 are provided on the end face of the light guide plate 2 (end face formed by the thickness direction and the width direction).
  • the end face on which each LED 3 is arranged is also referred to as an incident end face.
  • the power supply terminal 5 is provided at an end portion corresponding to the width direction of the light guide plate 2 among the plurality of end portions of the frame body 4, and is connected to a power supply device 6 for supplying power to each LED 3. Since an alternating current is supplied to the power supply terminal 5, the power supply device 6 converts the direct current into direct current, adjusts the voltage as necessary, and supplies the direct current to the LED 3.
  • FIG. 1 schematically shows the lighting device 1, and the connection between the power supply terminal 5 and the power supply device 6 and each LED 3 is omitted.
  • Light that is introduced from a plurality of LEDs 3 to the incident end face of the light guide plate 2 is emitted from the emission-side main surface toward the front side in the drawing of FIG. 1 by the scattering element provided in the light guide plate 2.
  • the scattering element various known scattering elements such as white reflective dot printing provided on the main surface, surface fine unevenness provided on the main surface, and the inclusion of a light diffusing material can be applied. It is preferable to contain a material.
  • the light guide plate 2 used in the lighting device 1 that is the subject of the present invention has a length L (cm) in the light guide direction and a width W (cm) of the light guide plate 2 orthogonal to the light guide direction and the thickness direction of the light guide plate 2. ) And W / L ⁇ 10.
  • the light guide plate has been required to have a longer light guide distance, and in the elongated light guide plate as in the present invention, the light source is usually provided on the short side (side of the length L).
  • the heat problem can be solved by dispersively arranging the LEDs on the long side (side of the length W) of the light guide plate 2.
  • the light guide plate 2 when the thickness of the light guide plate 2 is constant, the light guide plate 2 can be manufactured at low cost by cutting out from the resin substrate produced by the extrusion manufacturing method. Further, the thickness of the light guide plate 2 is preferably 2 mm to 30 mm. The weight of the illuminating device 1 can be suppressed by setting it as 30 mm or less. In particular, when the lighting device 1 of the present invention is attached to a fluorescent lamp fixture, the lighting device 1 can be used without overloading the fluorescent fixture. Moreover, the light from LED can be efficiently introduced into the light guide plate 2 by setting the thickness of the light guide plate 2 to 2 mm or more.
  • the light guide plate 2 has a main surface and an end surface of the light guide plate 2 as mirror surfaces and contains a light diffusing material therein.
  • a light diffusing material in which the main scattering elements of the light guide plate 2 are contained it can be manufactured at a lower cost than when printing or surface unevenness processing is separately provided.
  • a light diffusing material that is uniformly diffused is used as a scattering element, a difference in luminance of the main surface of the light guide plate 2 tends to occur between the vicinity of the light source and the position away from the light source. , Almost inconspicuous.
  • the difference between the refractive index of the light diffusing material and the refractive index of the base material of the light guide plate 2 is preferably 0.4 or more.
  • a light diffusing material With such a light diffusing material, light can be refracted more strongly in the light guide plate 2. As a result, the amount of light emitted in the direction perpendicular to the main surface of the light guide plate 2 can be increased. Therefore, there is a feature that it is not necessary to provide a separate light diffusion sheet on the light exit side of the light guide plate 2.
  • the volume average particle diameter of the light diffusing material is preferably 0.5 to 5 ⁇ m, and the concentration is preferably 0.0001 to 0.003% by mass.
  • the volume average particle diameter of the light diffusing material is smaller than 0.5 ⁇ m, there may be a difference in color between the vicinity of the incident end face of the light guide plate 2 and the position away from the bottom.
  • the volume average particle diameter of the light diffusing material is larger than 5 ⁇ m, the contained large particles may become bright spots during lighting and impair the appearance.
  • the manufacturing apparatus of the light guide plate 2 may be damaged.
  • the volume average particle diameter is determined by a laser diffraction scattering method.
  • the concentration of the light diffusing material is less than 0.0001% by mass, the light in the light guide plate 2 may not be emitted sufficiently in the main surface direction. On the other hand, if it is larger than 0.003 mass%, only the vicinity of the light source may become bright.
  • the base material of the light guide plate 2 of the present invention can use a transparent resin such as an acrylic resin, a styrene resin, a polycarbonate resin, or the like. From the viewpoint of transparency, acrylic resins, particularly polymethyl methacrylate are particularly preferable.
  • inorganic compound particles having a large refractive index difference with respect to the base resin such as titanium oxide and zinc oxide, are preferably used.
  • a light source may also be provided on the end face opposite to one incident end face.
  • the plurality of LEDs 3 provided on the opposite end faces as shown in FIG. 2A may face each other, or the plurality of LEDs 3 provided on the opposite end faces as shown in FIG. 2B may not face each other. .
  • the number of LEDs is not necessarily large, and is equal to or less than W / L ⁇ 20 (the value obtained by multiplying the width W divided by the length L in the light guide direction by 20) per one incident end face. Is preferred. Considering the manufacturing cost, it is preferable that the number of LEDs is small. If the heat dissipation performance of the LED is improved, the number of LEDs can be reduced. In addition, when a lighting device is configured with a small number of LED elements, there is a problem of insufficient heat dissipation.
  • the total number of LEDs arranged on one side or both sides of the light guide plate is preferably W / L / 2 or more. If the number is less than W / L / 2, the LEDs are sparse, and it is expected that the in-plane luminance of the light guide plate will be uneven.
  • a heat radiating plate that dissipates heat generated by the plurality of LEDs 3 may be provided on the main surface on the opposite side of the light guide plate 2. Alternatively, as shown in FIG. 3, a heat radiating plate 7 may be provided on the side surface opposite to the light guide plate 2 for the plurality of LEDs 3.
  • 3 is a cross-sectional view taken along the line III-III of FIG.
  • FIG. 2A shows an example in which a heat radiating plate 7 is provided between the frame 4 and each LED 3 in addition to the configuration example of FIG. 2A.
  • FIG. 3 shows an example in which the heat sink 7 is installed, and the present invention is not limited to this.
  • a material having a heat radiation function may be used for the frame body 4 itself, or the heat radiation plate 7 may be installed outside the frame body 4.
  • the arrangement of the frame body 4 and the light guide plate 2 is not limited to FIG.
  • the frame 4 may be bonded to the non-emission side main surface 22.
  • an LED module in which a plurality of LEDs are arranged on a substrate may be used.
  • the assembly becomes complicated.
  • the problem that the assembly becomes complicated can be reduced by providing the power supply wiring on the substrate. In this case, the function of the power supply device 6 can be realized in the LED module.
  • the lower side of the light guide plate 2 is shown as the outgoing side main surface 21, and the upper side is shown as the counter outgoing side main surface 22.
  • the emission-side main surface 21 and the non-emission-side main surface 22 are spaced apart by a thickness T (cm) in the thickness direction.
  • T thickness
  • the light guide plate 2 may include reflection elements on the width direction end surfaces (a pair of end surfaces that are the side surfaces of the light guide plate 2 and the end surfaces on both short sides) and the non-emission side main surface 22.
  • the reflective element can be provided by metal deposition such as Al, reflective tape such as aluminum tape or white tape, application of reflective white paint, or the like.
  • it does not prevent that LED is provided also in the at least one edge part of the width direction of the light-guide plate 2.
  • a plate-shaped light guide plate is used as an example of the light guide plate 2, but the present invention is not limited to this.
  • a polygonal column shape may be used.
  • a plate shape is preferable.
  • the advantage of the LED for example, energy efficiency is high and toxic mercury is not used.
  • the advantage of a long life it is possible to provide an illumination device that has good light diffusion characteristics and less glare when viewed directly.
  • a light guide plate substrate having a thickness of 5 mm was manufactured using an ordinary extruder with acrylic resin (Kuraray Parapet made) containing 0.002 mass% of titanium oxide particles having a volume average particle size of 1 ⁇ m.
  • the light guide plate substrate is cut into a length L (light guide length) in the light guide direction: 100 mm and a width W: 1500 mm, and the end faces of four sides (incident end face, end face opposite to the incident end face and two side faces, in other words, And a surface other than the two main surfaces) to obtain a light guide plate.
  • a white reflective film (MC-PET, manufactured by Furukawa Electric Co., Ltd.) having substantially the same shape as the main surface of the light guide plate was overlaid on the main surface on the opposite side of the light guide plate obtained. Further, a reflective aluminum tape was attached to a pair of end faces (both short sides) which are side faces of the light guide plate.
  • the LED module was placed on both long sides of the light guide plate on which the reflection plates were overlapped, and fitted into the frame.
  • Male projection pins were attached to both ends of the short side of the frame as power terminals to be fitted into the fluorescent lamp fixture socket to form an AC power circuit, which was connected to the LED power supply (AC / DC adapter).
  • the power supply device converts an alternating current introduced from the power supply terminal into a direct current and supplies it to each LED.
  • the number of LEDs used is 150 (75 ⁇ 2), which satisfies W / L / 2 or more.
  • FIG. 5 shows a graph obtained by normalizing the measurement results with the illuminance at the front as a reference. Specifically, in FIG. 5, for each of the example and the comparative example, the illuminance at the front is used as a reference value, and the ratio of the illuminance in the upward direction with respect to the reference value is shown as normalized illuminance (%).
  • the illuminating device of the present invention exhibited excellent diffusion characteristics almost equivalent to a fluorescent lamp.
  • the diffusion characteristics of the fluorescent lamp type LED of Comparative Example 2 were very narrow.
  • the fluorescent lamp type LED of Comparative Example 2 was dazzling when the light source device was directly viewed, but the lighting device of the present invention was not dazzling.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage qui utilise des diodes électroluminescentes, et qui a de bonnes propriétés de dispersion de la lumière, un éblouissement réduit lorsqu'il est regardé droit dans les yeux, et qui a également les propriétés avantageuses des diodes électroluminescentes. Il est décrit de façon spécifique un dispositif d'éclairage (1) comprenant : une plaque de guidage de lumière (2) qui peut éjecter de la lumière introduite par l'intermédiaire d'une surface de bord de celle-ci par l'intermédiaire de la surface principale de celle-ci ; et de multiples diodes électroluminescentes (3) disposées sur la surface de bord. Dans le dispositif d'éclairage (1), la longueur (L) (cm) de la plaque de guidage de lumière (2) dans la direction de guidage de lumière et la largeur (W) (cm) de la plaque de guidage de lumière (2) orthogonale tout à la fois à la direction de guidage de lumière et à la direction de l'épaisseur de la plaque de guidage de lumière (2) satisfont à l'exigence représentée par la formule : W/L ≥ 10, et le nombre de diodes électroluminescentes (3) est de (W/L)/2 ou davantage. Le dispositif d'éclairage (1) comprend de plus : un corps de bâti (4) qui reçoit la plaque de guidage de lumière (2) et les diodes électroluminescentes (3) ; et une borne d'alimentation (5) pour les diodes électroluminescentes (3), qui est disposée sur au moins une partie d'extrémité du corps de bâti (4) qui correspond à la direction de la largeur de la plaque de guidage de lumière (2).
PCT/JP2010/006446 2009-11-06 2010-11-01 Dispositif d'éclairage WO2011055527A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201080050032.2A CN102667308B (zh) 2009-11-06 2010-11-01 照明装置
JP2011539283A JP5507577B2 (ja) 2009-11-06 2010-11-01 照明装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009254574 2009-11-06
JP2009-254574 2009-11-06

Publications (1)

Publication Number Publication Date
WO2011055527A1 true WO2011055527A1 (fr) 2011-05-12

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PCT/JP2010/006446 WO2011055527A1 (fr) 2009-11-06 2010-11-01 Dispositif d'éclairage

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JP (1) JP5507577B2 (fr)
KR (1) KR20120102614A (fr)
CN (1) CN102667308B (fr)
WO (1) WO2011055527A1 (fr)

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KR102305599B1 (ko) 2014-10-22 2021-09-28 엘지이노텍 주식회사 조명장치 및 이를 포함하는 차량용 램프

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JP2005228536A (ja) * 2004-02-12 2005-08-25 Santo Kagaku:Kk 導光材
JP2006294343A (ja) * 2005-04-07 2006-10-26 Mitsubishi Rayon Co Ltd Ｌｅｄ面状光源装置
JP2008120210A (ja) * 2006-11-10 2008-05-29 Inoac Corp 照明器具
JP2008288183A (ja) * 2007-04-18 2008-11-27 Ksk:Kk 照明器具
JP2009199820A (ja) * 2008-02-20 2009-09-03 Kanehirodenshi Corp Ｌｅｄランプ
JP2009259557A (ja) * 2008-04-16 2009-11-05 Toyoda Gosei Co Ltd 線状発光装置

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CN1900578A (zh) * 2006-07-21 2007-01-24 周岳泉 夜读仪
CN201032081Y (zh) * 2007-04-09 2008-03-05 台湾奈普光电科技股份有限公司 背光模块
JP5066462B2 (ja) * 2008-02-29 2012-11-07 スタンレー電気株式会社 車両用灯具
CN201302065Y (zh) * 2008-11-28 2009-09-02 常州丰盛光电科技股份有限公司 Led日光灯

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Publication number Priority date Publication date Assignee Title
JP2005228536A (ja) * 2004-02-12 2005-08-25 Santo Kagaku:Kk 導光材
JP2006294343A (ja) * 2005-04-07 2006-10-26 Mitsubishi Rayon Co Ltd Ｌｅｄ面状光源装置
JP2008120210A (ja) * 2006-11-10 2008-05-29 Inoac Corp 照明器具
JP2008288183A (ja) * 2007-04-18 2008-11-27 Ksk:Kk 照明器具
JP2009199820A (ja) * 2008-02-20 2009-09-03 Kanehirodenshi Corp Ｌｅｄランプ
JP2009259557A (ja) * 2008-04-16 2009-11-05 Toyoda Gosei Co Ltd 線状発光装置

Also Published As

Publication number Publication date
CN102667308A (zh) 2012-09-12
KR20120102614A (ko) 2012-09-18
CN102667308B (zh) 2015-05-13
JP5507577B2 (ja) 2014-05-28
JPWO2011055527A1 (ja) 2013-03-21

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