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WO2012147946A1 - Appareil d'éclairage - Google Patents

Appareil d'éclairage Download PDF

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Publication number
WO2012147946A1
WO2012147946A1 PCT/JP2012/061449 JP2012061449W WO2012147946A1 WO 2012147946 A1 WO2012147946 A1 WO 2012147946A1 JP 2012061449 W JP2012061449 W JP 2012061449W WO 2012147946 A1 WO2012147946 A1 WO 2012147946A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
light
light emitting
conversion unit
path conversion
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/061449
Other languages
English (en)
Japanese (ja)
Inventor
毅 江原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of WO2012147946A1 publication Critical patent/WO2012147946A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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.
  • the cross-sectional shape refers to a cross-sectional shape in a plane perpendicular to the irradiation direction of the illumination device.
  • LED light emitting diode
  • the LED is a point light source, and the illumination device having a circular cross-sectional shape can make the illuminance uniform more easily than the illumination device having a polygonal cross-sectional shape.
  • Many devices have been proposed.
  • Patent Document 1 As an example of an illuminating device having a rectangular cross-sectional shape and an LED as a light source, there is a backlight of a liquid crystal display device as in Patent Document 1.
  • a light source substrate including LEDs is arranged on the side surface of a rectangular lighting device, and the light from the LEDs is irradiated to the reflecting surface arranged on the bottom surface, and the illuminance is uniformed by the reflected light. .
  • Patent Document 2 by using a light guide plate, the light of the LED is guided into the light guide plate arranged in the vicinity of the light source substrate provided with the LEDs, so that the illuminance is obtained even if the cross-sectional shape is rectangular. Has been realized.
  • the illumination device of Patent Document 1 it is possible to uniformly illuminate the front of the light emitting surface of the illumination device, but it is not possible to illuminate the outer periphery of the light emitting surface.
  • the configuration of Patent Document 1 since the light source substrate including the LEDs is arranged on the side surface portion of the lighting device, it is difficult to illuminate the outer periphery of the light emitting surface that is the rear portion of the LEDs.
  • the illumination device of Patent Document 2 it is possible to uniformly illuminate the front of the light emitting surface of the light guide plate, but it is not considered to illuminate the outer periphery of the light emitting surface.
  • lighting devices design is emphasized, and lighting devices corresponding to various cross-sectional shapes are required. Furthermore, it is required not only to uniformly illuminate the front of the light emitting surface of the illuminating device, but also to illuminate the outer periphery of the illuminating device to illuminate a wide space. In particular, in an illumination device provided on a ceiling, it is important to impress a wider space by illuminating the ceiling on the outer periphery of the light emitting surface. In Patent Document 1 and Patent Document 2, it is not considered to illuminate the outer periphery of such a light emitting surface, and further, it is not considered to illuminate the ceiling when it is provided on the ceiling.
  • the present invention has been made in view of the above-described problems, and the object of the present invention is to illuminate the front of the light emitting surface in an illuminating device using a light emitting element as a light source, regardless of the cross-sectional shape.
  • An object of the present invention is to provide an illumination device that can also illuminate a certain area.
  • An illuminating device is an illuminating device that illuminates a certain region by including a light source module and a control member that faces the light source module and converts light from the light source module in different directions. Includes a light source having a plurality of light emitting elements and an optical member that faces the light source and transmits light from the light source, and the optical member is provided with an optical path conversion unit facing the light source. Yes.
  • the illumination device using the light emitting element can be an illumination device that illuminates the front of the light emitting surface and also illuminates a region with an outer periphery by the light path conversion unit.
  • an illuminating device using an LED as a light source it is possible to provide an illuminating device capable of illuminating an area with an outer periphery in addition to uniformly illuminating the front of the light emitting surface regardless of the cross-sectional shape. Can do.
  • Embodiment 1 of this invention It is the bottom view (a) and sectional drawing (b) of the illuminating device in Embodiment 1 of this invention. It is the schematic of the light source module which comprises the illuminating device in Embodiment 1 of this invention.
  • the illuminance distribution by the optical member of Embodiment 1 of this invention is shown, and is an illuminance distribution without an optical member (a) and with an optical member (b).
  • Embodiment 2 It is a perspective view of the light source module derived from Embodiment 1 of this invention. It is a top view of the light source module in Embodiment 2 of this invention. It is a top view of another light source module in Embodiment 2 of this invention.
  • FIG. 1 shows a bottom view (a) and a cross-sectional view (b) as viewed from the bottom of the lighting device in the first embodiment.
  • FIG. 2 is a schematic diagram of a light source module that constitutes the illumination device according to the first embodiment.
  • the illuminating device 1 in FIG. 1 has a configuration in which a light source module 2 and an outer member 3 provided so as to surround the light source module 2 are provided with a control member 4, and light of the light source module 2 is controlled by lighting control of the light source module 2. Is configured to illuminate a space area where the illumination device 1 is provided via the control member 4.
  • the external member 3 has a control member 4 having a rectangular cross-sectional shape, and the light from the light source module 2 is at the center of the outer member 3 so that the light is emitted toward the side surface of the control member 4. It arrange
  • the control member 4 provided on the outer member 3 has a reflection function, and for example, a white paint is applied on the entire surface of an aluminum plate.
  • the material of the control member 4 is not limited to the aluminum plate, and may be a thin and strong material.
  • the control member 4 is not limited to applying a white paint on the aluminum plate, and a white material may be used as long as the surface is white.
  • a white paint is used on the surface of the control member 4, a paint having a high reflectance of 85% or more and a high scattering property is preferable.
  • the holding part 3a to which the light source module 2 is attached is preferably made of a material having good thermal conductivity such as an aluminum plate in order to enhance the function of radiating heat generated in the light source module 2.
  • the light source module 2 has a configuration in which four pairs are arranged substantially parallel to the four sides of the holding portion 3a at the center of the outer member 3.
  • the light source module 2 includes a light source 5 and an optical member 6 that controls the light emitted from the light source 5 as shown in FIG.
  • the light source 5 includes a light emitting element 5a and a light source substrate 5b on which the light emitting elements are arranged.
  • a light emitting element 5a for example, a light emitting diode (hereinafter referred to as LED) or an organic EL element is used.
  • the light source substrate 5b has a plurality of light emitting elements 5a arranged in a straight line.
  • the optical member 6 is arranged so as to face the light source 5 and is arranged so that all the emitted light of the LED which is the light source 5 enters the optical member 6 and is controlled.
  • the optical member 6 is fixed to the light source substrate 5b by providing an optical path conversion unit 7 at a position facing the light emitting element 5a.
  • the optical path conversion unit 7 has an asymmetric triangular concave shape in a plane that passes through the center of each light emitting element 5a and is perpendicular to the arrangement row direction of the light emitting elements 5a and perpendicular to the surface of the light source substrate 5b. Moreover, it is preferable to reduce the illuminance unevenness due to the LED arrangement row direction caused by the corners by eliminating the corners at the corners of the triangular concave surface of the optical path conversion unit 7. Further, it is more preferable that the curved surface of the corner is a gentle curved surface of R1 or more.
  • the outgoing light of the light emitting element 5a is transmitted through the surface indicated by the dotted line of the optical path conversion unit 7 and refracted outward as indicated by the arrow in FIG.
  • the optical member 6 having the optical path conversion unit 7 may be individually arranged with respect to the light emitting element 5a.
  • the light emitting element as shown in FIG. It is preferable to provide a pair of optical members 6 for the row of light sources 5 of 5a.
  • the center of the light source substrate 5b and the center of the optical member 6 are arranged to substantially coincide with each other, and the optical path conversion unit 7 has a symmetrical shape with respect to the center of the optical member 6.
  • the outer two optical path conversion units 7 shown in FIG. 2 each have an asymmetric triangular concave shape.
  • the inclined surface far from the center of the optical member 6 intersects the central axis of the light emitted from the light emitting element 5a. That is, the most concave position of each triangular concave shape is closer to the center of the optical member 6 than the central axis of the light emitted from the light emitting element 5a.
  • the light emitted from the light emitting element 5a enters the far inclined surface and is refracted to change the optical path outward.
  • optical member 6 transparent acrylic is used.
  • the optical member is not limited to acrylic, and polycarbonate or the like may be used as long as the material has high transmittance.
  • FIG. 3A and 3B show the effect of the optical member provided in the light source module in the lighting apparatus of the first embodiment.
  • FIG. 3A shows the case where there is no optical member
  • FIG. 3B shows the case where there is an optical member.
  • the illuminance distribution centered on the front surface of the light source 5 is an illuminance distribution in which the illuminance located at the front is high and the illuminance decreases from the front toward the outside as shown in the graph.
  • the illuminance can be made uniform even at a position outside the front surface of the light source 5 by using the optical member 6. Moreover, the illuminance in the LED arrangement row direction can be made uniform even in a region wider than the light source substrate 5b.
  • FIG. 4 shows the effect of the optical member 6 in the lighting device 1.
  • 4A shows a light beam traveling direction of the illuminating device by a dotted line
  • FIG. 4B shows an illuminance distribution below the light emitting surface in the illuminance measurement line A, respectively.
  • the illuminance distribution under the light emitting surface of the illuminating device 1 improves the illuminance at the four corners of the rectangular illuminating device and makes the illuminance uniform according to the cross-sectional shape of the illuminating device. I understand that.
  • FIG. 5 shows the illumination distribution of the ceiling in the lighting device 1 of the present invention.
  • the light traveling direction is indicated by a dotted line, and the illuminance distribution in the illuminance measurement line A is indicated. Since all the light source modules 2 are arranged in the direction of the side surface of the lighting device 1 in the lighting device 1 of the present invention, a part of the light can contribute to the lighting of the ceiling as shown in FIG. That is, in the illuminating device 1 having a rectangular cross-sectional shape as in the illuminating device of the present invention, the illuminance below the light emitting surface can be made uniform and the outside ceiling can be illuminated.
  • the present invention is not limited to the first embodiment described above.
  • the light source substrate 5b including three LEDs is used.
  • the light source substrate 5b may include two or four or more LEDs on one light source substrate. 7 may be one or more. As the number of LEDs on the light source substrate 5b increases, the illuminance in the LED arrangement row direction can be made more uniform.
  • the LEDs may be arranged on the same straight line across the plurality of substrates. At that time, it is preferable to arrange the pair of optical members 6 so that the lights of all the LEDs arranged on the same straight line are incident on the lighting device 1.
  • the cross-sectional shape of the control member 4 provided on the outer member 3 may be not only a rectangular shape but also a polygonal shape such as an octagonal shape.
  • the cross-sectional shape is polygonal, it is preferable to provide a pair of the light source substrate 5b and the optical member 6 of the light source module 2 according to the number of sides of the shape.
  • the lighting device 1 of the present invention is not limited to the indoor lighting device, and the installation is not limited only to the ceiling.
  • a light source substrate 5b having a light source 5a, a light source module 2 comprising an optical member 6, a control member 4 provided on the outer member 3 is covered with a diffusing member, and light propagates in the region from the optical member 6 to the control member 4. Even if the light guide member to be arranged is provided, the same effects and functions as those of the present invention are applied as long as the same effects and operations are produced.
  • FIG. 6 is a perspective view of an optical member derived from the first embodiment in the illumination device of the present invention
  • FIG. 7 is a top view of an optical member different from the first embodiment in the illumination device of the present invention
  • FIG. 10 is a top view of still another configuration of the optical member different from Embodiment 1 in the illumination device of the present invention.
  • FIG. 6 a structure for narrowing the light emission angle is newly provided on the back surface of the optical member 6 of the first embodiment where the optical path conversion unit 7 is provided, perpendicular to the LED arrangement row direction.
  • Other configurations are the same as those in the first embodiment.
  • the optical member 6 is provided with a convex cylindrical lens shape 8 and a tapered portion 9 on the back surface on which the optical path changing portion 7 is provided.
  • the height direction of the cylindrical lens is provided substantially parallel to the LED arrangement row direction.
  • the light distribution perpendicular to the optical substrate in the light emitted from the light emitting element 5a that is an LED that passes through the optical member 6 has a narrow light distribution compared to the Lambert distribution.
  • Can do even a lighting device that is a control member with a thin thickness in the height direction can efficiently irradiate the reflecting member provided on the control member, and the spatial region Can be illuminated.
  • the optical member 6 includes an optical path conversion unit 7 at a substantially front position of the light emitting element 5a on a surface facing the same direction as the surface on which the light emitting element 5a of the light source substrate 5b is disposed.
  • the optical member 6 is the same as that of the first embodiment with respect to the configuration excluding the position provided in the optical path conversion unit 7.
  • the light emitted from the light emitting element 5a is transmitted through the surface indicated by the dotted line of the optical path conversion unit 7, and refracts the light outwardly as indicated by the arrow as in the optical member 6 of the first embodiment.
  • the light emitted from the LED which is a point light source, is refracted more outward in the direction perpendicular to the light source substrate 5b, so that the optical member 6 can be refracted as in the first embodiment compared to the second embodiment. It is more preferable to form the optical path conversion unit 7 on the surface facing the light source substrate 5b because the prism function is achieved.
  • FIG. 8 is a top view of another configuration of the optical member different from the second embodiment in the illumination device of the present invention.
  • FIG. 8 shows a configuration in which an optical path conversion unit 7 is newly provided at a position facing the light source 5 in FIGS. 2 and 7, and other configurations are the same as those in the first embodiment.
  • the light source module 2 can be thinned by including the light source 5 in the light conversion unit 7 particularly in accordance with the size of the light source 5. Since the light source module 2 is thinned, a space can be formed from the light source module 2 to the control member 4, so that the size of the outer member 2 can be reduced or the area of the control member 4 can be increased.
  • the shape of the optical path conversion unit 7 is preferably symmetric with respect to the center of the optical member 6 in order to make the illuminance uniform in the light emitting element 5a arrangement direction.
  • the shape of the optical path conversion unit 7 may not be symmetric with respect to the center of the optical member 6.
  • Embodiment 1 has been described here, a similar convex cylindrical lens shape and a tapered portion are provided on the back portion on the side having the optical path conversion portion even if the optical member has another notch shape. May be.
  • the lighting device is a lighting device that illuminates a certain region by including a light source module and a control member that faces the light source module and converts light from the light source module in different directions.
  • the light source module includes a light source having a plurality of light emitting elements, and an optical member that faces the light source and transmits light from the light source, and the optical member faces the light source and changes an optical path. Is provided.
  • the illumination device using the light emitting element can be an illumination device that illuminates the front of the light emitting surface and also illuminates a region with an outer periphery by the light path conversion unit.
  • the illumination device includes the light source in which the plurality of light emitting elements are arranged in a straight line, and the light path conversion unit has two or more, or
  • the optical path conversion unit and the other optical path conversion unit are formed in a symmetrical shape and in a symmetrical shape with respect to a plane that passes through the center of the light source module and is perpendicular to the arrangement direction of the plurality of light emitting elements.
  • the illuminating device which illuminates the area
  • the optical path conversion unit is configured by a notch provided in the optical member.
  • the illumination device using the light emitting element by providing the light path conversion unit with a notch at a symmetrical position in the light source module, an inexpensive and compact light path conversion unit can be obtained. It can be set as the illuminating device which illuminates the area
  • the notch is formed on a side of the optical member facing the plurality of light emitting elements, and a part of the plurality of light emitting elements.
  • the light emitting element is included.
  • the illumination device using the light emitting element by providing the optical path conversion unit by notching at a symmetrical position in the light source module, an inexpensive and compact optical path conversion unit can be obtained.
  • the thickness of the module can be reduced, and a lighting device that illuminates the front of the light emitting surface and also illuminates a region with an outer periphery can be provided.
  • the illumination device includes at least three light source modules arranged adjacent to each other, provided with a control member facing the light source module, and the optical path changing unit includes the adjacent light source modules. The direction of the light is changed so that the directions of the light overlap.
  • the optical path conversion unit by notching at a symmetrical position in the light source module, an inexpensive and compact optical path conversion unit can be obtained.
  • the thickness of the module can be reduced. Furthermore, by changing the direction of light so that light from adjacent light sources of the light source module overlaps, it is possible to illuminate the front of the light emitting surface and illuminate a region with an outer periphery.
  • the present invention is an illuminating device that uses a light source such as an LED and can uniformly illuminate a region with an outer periphery in addition to illuminating the front of the light emitting surface uniformly regardless of the cross-sectional shape. For this reason, it can be used for a wide range of purposes, such as illuminating a certain space area, as well as the configuration arranged on the ceiling to illuminate the space area in the room.
  • a light source such as an LED and can uniformly illuminate a region with an outer periphery in addition to illuminating the front of the light emitting surface uniformly regardless of the cross-sectional shape. For this reason, it can be used for a wide range of purposes, such as illuminating a certain space area, as well as the configuration arranged on the ceiling to illuminate the space area in the room.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention porte sur un appareil d'éclairage, qui éclaire une région spécifique du fait qu'il comporte une pluralité de modules de source de lumière, et une pluralité d'éléments de commande, qui font face aux modules de source de lumière et qui convertissent la direction de la lumière émise à partir des modules de source de lumière en différentes directions. Dans chacun des modules de source de lumière, sont prévus une pluralité de sources de lumière et un élément optique qui fait face aux sources de lumière et qui est traversé par la lumière émise par les sources de lumière, et une unité de conversion de trajectoire optique est disposée sur l'élément optique, de sorte que l'unité de conversion de trajectoire optique fasse face à une source de lumière proche du module de source lumière adjacent.
PCT/JP2012/061449 2011-04-28 2012-04-27 Appareil d'éclairage Ceased WO2012147946A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-100475 2011-04-28
JP2011100475A JP2014135118A (ja) 2011-04-28 2011-04-28 照明装置

Publications (1)

Publication Number Publication Date
WO2012147946A1 true WO2012147946A1 (fr) 2012-11-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/061449 Ceased WO2012147946A1 (fr) 2011-04-28 2012-04-27 Appareil d'éclairage

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JP (1) JP2014135118A (fr)
WO (1) WO2012147946A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6494684B2 (ja) * 2017-04-27 2019-04-03 株式会社日本設計 室内照明構造及び室内照明方法
TWI792044B (zh) * 2020-08-19 2023-02-11 楊永賢 用於補助光學檢測裝置之光源裝置及其組成之光學檢驗裝置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005071971A (ja) * 2002-10-04 2005-03-17 Nichia Chem Ind Ltd 面発光装置用の導光板と面発光装置
JP2009289709A (ja) * 2008-06-02 2009-12-10 Toshiba Lighting & Technology Corp 天井直付け形照明装置及び照明装置
JP2011044430A (ja) * 2009-08-19 2011-03-03 Lg Innotek Co Ltd 照明装置
JP2011512006A (ja) * 2008-01-30 2011-04-14 デジタル オプティクス インターナショナル，リミティド ライアビリティ カンパニー 薄型照明システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005071971A (ja) * 2002-10-04 2005-03-17 Nichia Chem Ind Ltd 面発光装置用の導光板と面発光装置
JP2011512006A (ja) * 2008-01-30 2011-04-14 デジタル オプティクス インターナショナル，リミティド ライアビリティ カンパニー 薄型照明システム
JP2009289709A (ja) * 2008-06-02 2009-12-10 Toshiba Lighting & Technology Corp 天井直付け形照明装置及び照明装置
JP2011044430A (ja) * 2009-08-19 2011-03-03 Lg Innotek Co Ltd 照明装置

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