JP2014179283A - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
JP2014179283A
JP2014179283A JP2013053630A JP2013053630A JP2014179283A JP 2014179283 A JP2014179283 A JP 2014179283A JP 2013053630 A JP2013053630 A JP 2013053630A JP 2013053630 A JP2013053630 A JP 2013053630A JP 2014179283 A JP2014179283 A JP 2014179283A
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Japan
Prior art keywords
guide plate
light guide
light
light emitting
surface portion
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JP2013053630A
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Japanese (ja)
Inventor
Atsushi Sasaki
淳 佐々木
Makoto Kawagoe
真 川越
Yasuhiro Kamata
康広 鎌田
Yasuhide Okada
康秀 岡田
Fumishige Iwata
文重 岩田
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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Application filed by Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Priority to JP2013053630A priority Critical patent/JP2014179283A/en
Priority to KR1020130109790A priority patent/KR20140113270A/en
Priority to CN201310418401.4A priority patent/CN104048226A/en
Priority to TW102133570A priority patent/TW201435260A/en
Publication of JP2014179283A publication Critical patent/JP2014179283A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • 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
    • F21K9/66—Details of globes or covers forming part of the light source
    • 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
    • F21K9/68—Details of reflectors forming part of the light source
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like
    • 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
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • 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]

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of lighting up a surrounding area.SOLUTION: A lighting device 10 includes a light guide plate 15 and a light emitting element 35. The light guide plate 15 includes: a surface part 25; a rear surface part 26 located at the opposite side of the surface part 25; and a groove part 29 provided at the rear surface part 26 side. The light emitting element 35 is disposed in the groove part 29 of the light guide plate 15.

Description

本発明の実施形態は、導光板を用いた照明装置に関する。   Embodiments described herein relate generally to a lighting device using a light guide plate.

従来、発光素子の光を導光板に入射させてこの導光板の表面部から光を出射させることにより、導光板の表面部である発光面の均斉度を向上させるようにした天井直付形の照明装置がある。   Conventionally, a ceiling-mounted type that improves the uniformity of the light emitting surface that is the surface portion of the light guide plate by causing the light of the light emitting element to enter the light guide plate and emitting the light from the surface portion of the light guide plate. There is a lighting device.

導光板は四角形の平板状に形成され、この導光板の端面に対向して発光素子が配置されている。発光素子は基板に実装され、この基板が導光板の周辺部を覆って支持する金属製の枠体に熱伝導可能に取り付けられている。   The light guide plate is formed in a rectangular flat plate shape, and a light emitting element is arranged to face the end face of the light guide plate. The light emitting element is mounted on a substrate, and this substrate is attached to a metal frame that covers and supports the periphery of the light guide plate so as to allow heat conduction.

特開２０１２−１０９０５５号公報JP 2012-109055 A

しかしながら、導光板を用いた照明装置は、導光板の端面に対向して発光素子を配置していることで、発光素子とともに導光板の周辺部を金属製の枠体で覆っているため、照明空間に出射される光は導光板の表面部のみからであって下方向にしか出射されず、照明装置の周囲が暗くなり、違和感を感じやすい。   However, since the lighting device using the light guide plate has the light emitting element arranged facing the end face of the light guide plate, the periphery of the light guide plate is covered with a metal frame together with the light emitting element. The light emitted into the space is only from the surface portion of the light guide plate and is emitted only in the downward direction, so that the surroundings of the lighting device become dark and it is easy to feel uncomfortable.

本発明が解決しようとする課題は、周囲を明るくできる照明装置を提供することである。   The problem to be solved by the present invention is to provide a lighting device that can brighten the surroundings.

実施形態の照明装置は、導光板および発光素子を備える。導光板は、表面部、表面部に対して反対側の背面部、および背面部側に設けられた溝部を有する。発光素子は、導光板の溝部に配置する。   The lighting device of the embodiment includes a light guide plate and a light emitting element. The light guide plate has a front surface portion, a back surface portion opposite to the front surface portion, and a groove portion provided on the back surface portion side. The light emitting element is disposed in the groove portion of the light guide plate.

本発明によれば、導光板の背面部側に設けた溝部に発光素子を配置することにより、発光素子から導光板に入射した光を導光板の端面部からも出射させ、照明装置の周囲を明るくすることが期待できる。   According to the present invention, by arranging the light emitting element in the groove provided on the back side of the light guide plate, the light incident on the light guide plate from the light emitting element is also emitted from the end surface part of the light guide plate, and the periphery of the illumination device is It can be expected to brighten.

第１の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 1st Embodiment. 同上照明装置の断面図である。It is sectional drawing of an illuminating device same as the above. 第２の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 2nd Embodiment. 同上導光板の発光面の照度分布図を示し、(a)は反射板がある場合の発光面の照度分布図、(b)は反射板がない場合の発光面の照度分布図である。The illuminance distribution figure of the light emission surface of a light-guide plate same as the above is shown, (a) is the illuminance distribution figure of the light emission surface when there is a reflection plate, (b) is the illuminance distribution map of the light emission surface when there is no reflection plate. 第３の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 3rd Embodiment. 第４の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 4th Embodiment. 第５の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 5th Embodiment. 第６の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 6th Embodiment. 第７の実施形態を示す照明装置の導光板の断面図である。It is sectional drawing of the light-guide plate of the illuminating device which shows 7th Embodiment.

以下、第１の実施形態を、図１および図２を参照して説明する。   Hereinafter, a first embodiment will be described with reference to FIGS. 1 and 2.

図２に示すように、照明装置10は、周囲形状が円形あるいは四角形の天井直付形照明器具であり、天井面11に設置された引掛シーリングボディ12にアダプタ13を介して取り付けられる。   As shown in FIG. 2, the lighting device 10 is a ceiling direct-mounted lighting fixture having a circular shape or a square shape, and is attached to a hook ceiling body 12 installed on the ceiling surface 11 via an adapter 13.

照明装置10は、器具本体としてのシャーシ14、このシャーシ14の下面に取り付けられた導光板15、導光板15に配置された発光ユニット16、およびシャーシ14内に配置された点灯回路17を備えている。   The lighting device 10 includes a chassis 14 as a fixture body, a light guide plate 15 attached to the lower surface of the chassis 14, a light emitting unit 16 arranged on the light guide plate 15, and a lighting circuit 17 arranged in the chassis 14. Yes.

シャーシ14は、例えば金属製で、下面に導光板15が取り付けられる取付面部20が形成され、この取付面部20の周囲から側面部21が立ち上げられている。シャーシ14の上面中央部には、アダプタ13に装着されるアダプタガイド22が取り付けられている。   The chassis 14 is made of, for example, metal, and has an attachment surface portion 20 to which the light guide plate 15 is attached on the lower surface, and a side surface portion 21 is raised from the periphery of the attachment surface portion 20. An adapter guide 22 to be attached to the adapter 13 is attached to the center of the upper surface of the chassis 14.

図１に示すように、導光板15は、例えばアクリル樹脂などの透過率の高い材料によって円形あるいは四角形の平板状に形成されており、一主面であって下面である表面部25、この表面部25に対して反対側となる上面である背面部26、および側面である端面部27を有している。端面部27は表面部25から背面部26にかけて湾曲した湾曲面に形成されている。表面部25および端面部27が、導光板15から光が出射する発光面28として構成されている。   As shown in FIG. 1, the light guide plate 15 is formed in a circular or square flat plate shape with a material having high transmittance such as acrylic resin, and has a surface portion 25 which is a main surface and a lower surface, and this surface. It has a back surface portion 26 that is an upper surface opposite to the portion 25 and an end surface portion 27 that is a side surface. The end surface portion 27 is formed in a curved surface that is curved from the surface portion 25 to the back surface portion 26. The surface portion 25 and the end surface portion 27 are configured as a light emitting surface 28 from which light is emitted from the light guide plate 15.

導光板15の背面部26の周辺部近傍には、発光ユニット16が収容配置される溝部29が形成されている。導光板15の中央側に対向する溝部29の内面には、表面部25および背面部26に対して略垂直に形成された入射面30が形成されている。表面部25に対向する溝部29の内面は表面部25に沿って平行な平面に形成され、端面部27に対向する溝部29の内面は端面部27に沿った湾曲面に形成されている。なお、導光板15の背面部26側に設けられる溝部29は、導光板15の外形状（円形、四角形）にかかわらず、例えば四角形溝状に形成してもよいし、導光板15の外形状が円形の場合などには外形状に合わせて円形溝状に形成してもよい。   In the vicinity of the peripheral portion of the back surface portion 26 of the light guide plate 15, a groove portion 29 in which the light emitting unit 16 is accommodated is formed. On the inner surface of the groove portion 29 facing the center side of the light guide plate 15, an incident surface 30 formed substantially perpendicular to the surface portion 25 and the back surface portion 26 is formed. The inner surface of the groove portion 29 facing the surface portion 25 is formed in a parallel plane along the surface portion 25, and the inner surface of the groove portion 29 facing the end surface portion 27 is formed in a curved surface along the end surface portion 27. The groove portion 29 provided on the back surface portion 26 side of the light guide plate 15 may be formed in, for example, a rectangular groove shape regardless of the outer shape (circular or square) of the light guide plate 15, or the outer shape of the light guide plate 15 When is circular, it may be formed in a circular groove shape according to the outer shape.

導光板15の溝部29より導光板15の表面部25側に、導光板15の端面部27に連続する導光部31が設けられている
導光板15の表面部25および端面部27には光を拡散する拡散手段32が設けられている。拡散手段32は、例えば、導光板15の表面部25および端面部27の外面に、拡散処理を施したり、拡散シートを貼り付けたり、拡散板を配置するなど、どのような構成を用いてもよい。 A light guide portion 31 is provided on the surface portion 25 side of the light guide plate 15 from the groove portion 29 of the light guide plate 15 so as to be continuous with the end surface portion 27 of the light guide plate 15. Is provided. The diffusing means 32 may be of any configuration such as, for example, performing diffusion treatment on the outer surface of the surface portion 25 and the end surface portion 27 of the light guide plate 15, attaching a diffusion sheet, or arranging a diffusion plate. Good.

導光板15の背面部26には反射手段を設けてもよい。この反射手段は、例えば、反射シートや反射板を用いてもよいし、導光板15の背面側を取り付けるシャーシ14の取付面部20を兼用してもよい。   Reflecting means may be provided on the back surface portion 26 of the light guide plate 15. For example, a reflection sheet or a reflection plate may be used as the reflection means, or the attachment surface portion 20 of the chassis 14 to which the back side of the light guide plate 15 is attached may be used.

また、発光ユニット16は、発光モジュール33、およびこの発光モジュール33を取り付けたフレーム34を有し、導光板15の溝部29に沿って収容配置されている。   The light emitting unit 16 includes a light emitting module 33 and a frame 34 to which the light emitting module 33 is attached. The light emitting unit 16 is accommodated and disposed along the groove portion 29 of the light guide plate 15.

発光モジュール33は、複数の発光素子35、および複数の発光素子35を実装した基板36を有している。発光素子35には、例えば、面実装タイプのＳＭＤパッケージ式のＬＥＤ素子が用いられる。このＳＭＤパッケージは、ケース内にＬＥＤベアチップを配置し、蛍光体を含有した封止樹脂で封止したもので、封止樹脂の表面が光を出射する発光部35aとして構成されている。なお、発光素子35としては、発光色が同色のものを用いてもよいし、発光色が異なるものや発光色を変化させることが可能な物を用いてもよく、あるいは、例えばＥＬ素子などの他の発光素子を用いてもよい。また、基板36は、導光板15の溝部29に収まるように細長く形成され、その長手方向に沿って複数の発光素子35が１列または複数列配列されている。   The light emitting module 33 includes a plurality of light emitting elements 35 and a substrate 36 on which the plurality of light emitting elements 35 are mounted. As the light emitting element 35, for example, a surface mount type SMD package type LED element is used. This SMD package is an LED bare chip placed in a case and sealed with a sealing resin containing a phosphor, and the surface of the sealing resin is configured as a light emitting portion 35a that emits light. As the light emitting element 35, those having the same emission color may be used, those having a different emission color or those capable of changing the emission color may be used, or an EL element, for example, may be used. Other light emitting elements may be used. The substrate 36 is formed to be elongated so as to fit in the groove 29 of the light guide plate 15, and a plurality of light emitting elements 35 are arranged in one or more rows along the longitudinal direction.

フレーム34は、例えばアルミニウムなどの金属製で、導光板15の溝部29に納まるように細長く形成されており、長手方向に沿って基板36が熱的に接続された状態に取り付けられている。フレーム34は、シャーシ14に熱的に接続された状態に取り付けられている。   The frame 34 is made of a metal such as aluminum and is formed to be elongated so as to fit in the groove portion 29 of the light guide plate 15, and is attached in a state where the substrate 36 is thermally connected along the longitudinal direction. The frame 34 is attached in a state of being thermally connected to the chassis 14.

発光ユニット16は、導光板15の溝部29内で、溝部29内の入射面30に発光素子35の発光部35aが対向するように配置されている。さらに、導光板15の対向する溝部29の部分に配置された発光素子35の発光部35aが互いに対向されている。   The light emitting unit 16 is arranged in the groove portion 29 of the light guide plate 15 so that the light emitting portion 35 a of the light emitting element 35 faces the incident surface 30 in the groove portion 29. Further, the light emitting portions 35a of the light emitting elements 35 arranged in the portions of the groove portions 29 of the light guide plate 15 that face each other face each other.

また、点灯回路17の電源入力側がアダプタ13および引掛シーリングボディ12を通じて商用交流電源に接続され、点灯回路17の点灯出力側が発光モジュール33の基板36を通じて複数の発光素子35に接続されている。点灯回路17により、交流電力を所定の直流電力に変換して発光素子35に供給し、発光素子35を点灯させる。   Further, the power input side of the lighting circuit 17 is connected to a commercial AC power source through the adapter 13 and the hooking ceiling body 12, and the lighting output side of the lighting circuit 17 is connected to the plurality of light emitting elements 35 through the substrate 36 of the light emitting module 33. The lighting circuit 17 converts alternating current power into predetermined direct current power and supplies it to the light emitting element 35 to light the light emitting element 35.

そして、照明装置10の点灯時には、発光素子35の発光部35aから出た光が、主に、導光板15の入射面30から導光板15内に入射し、導光板15内を反射しながら導光板15の反対側へ向うとともに、反射を繰り返す光の一部が表面部25から出射される。   When the lighting device 10 is turned on, light emitted from the light emitting portion 35a of the light emitting element 35 is incident on the light guide plate 15 mainly from the incident surface 30 of the light guide plate 15, and is guided while being reflected in the light guide plate 15. A part of the light that goes to the opposite side of the light plate 15 and repeats reflection is emitted from the surface portion 25.

さらに、導光板15内を反射しながら導光板15の反対側へ向う光は、反対側の溝部29と表面部25との間の導光部31を通じて端面部27に到達し、端面部27から導光板15の側方や上方に出射される。   Further, the light traveling toward the opposite side of the light guide plate 15 while reflecting in the light guide plate 15 reaches the end surface portion 27 through the light guide portion 31 between the groove portion 29 and the surface portion 25 on the opposite side, and from the end surface portion 27. The light is emitted to the side and above the light guide plate 15.

そのため、導光板15の表面部25および端面部27を含む発光面28全体が、均一な明るさで発光する。   Therefore, the entire light emitting surface 28 including the surface portion 25 and the end surface portion 27 of the light guide plate 15 emits light with uniform brightness.

このように、導光板15の背面部26側に設けた溝部29に発光素子35を配置することにより、発光素子35から導光板15に入射した光を導光板15の端面部27からも出射させ、照明装置10の周囲を明るくすることができる。これにより、照明装置10が設置された天井面11も明るくすることができ、違和感を低減できる。   In this way, by arranging the light emitting element 35 in the groove portion 29 provided on the back surface portion 26 side of the light guide plate 15, the light incident on the light guide plate 15 from the light emitting element 35 is also emitted from the end surface portion 27 of the light guide plate 15. The surroundings of the lighting device 10 can be brightened. As a result, the ceiling surface 11 on which the illumination device 10 is installed can also be brightened, and the uncomfortable feeling can be reduced.

また、導光板15の溝部29より導光板15の表面部25側に導光板15の端面部27に連続する導光部31を設けることにより、光を端面部27まで導くことができる。   Further, by providing the light guide part 31 that is continuous with the end face part 27 of the light guide plate 15 on the surface part 25 side of the light guide plate 15 from the groove part 29 of the light guide plate 15, light can be guided to the end face part 27.

また、発光素子35は、導光板15の溝部29内で発光部35aが導光板15の中央側に対向する入射面30に対向するように配置することにより、光を他端側の端面部27に導くことができる。   In addition, the light emitting element 35 is disposed in the groove portion 29 of the light guide plate 15 so that the light emitting portion 35a faces the incident surface 30 facing the center side of the light guide plate 15, thereby allowing the light to pass through the end surface portion 27 on the other end side. Can lead to.

また、導光板15の端面部27を湾曲面に形成することにより、上方へ出射する光を増加させることができる。   Further, by forming the end surface portion 27 of the light guide plate 15 in a curved surface, it is possible to increase the light emitted upward.

さらに、導光板15の表面部25および端面部27の外面に拡散手段32を設けることにより、輝線などによる輝度むらの発生を低減できる。   Furthermore, by providing the diffusing means 32 on the outer surface of the surface portion 25 and the end surface portion 27 of the light guide plate 15, the occurrence of luminance unevenness due to bright lines or the like can be reduced.

次に、図３および図４に第２の実施形態を示す。なお、第１の実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 3 and FIG. 4 show a second embodiment. In addition, about the same structure and effect as 1st Embodiment, the description is abbreviate | omitted using the same code | symbol.

図３に示すように、照明装置10は、少なくとも導光板15の表面部25に対向する溝部29の内面側へ向う発光素子35からの光を入射面30へ反射させる反射手段40を備えている。反射手段40は、発光素子35の光出射側に配置されて、発光素子35から出た光がすべて導光板15の入射面30に入射するように反射させる反射板41である。   As shown in FIG. 3, the illuminating device 10 includes a reflecting means 40 that reflects light from the light emitting element 35 toward the inner surface side of the groove portion 29 facing at least the surface portion 25 of the light guide plate 15 to the incident surface 30. . The reflecting means 40 is a reflecting plate 41 which is disposed on the light emitting side of the light emitting element 35 and reflects all the light emitted from the light emitting element 35 so as to enter the incident surface 30 of the light guide plate 15.

反射板41がない場合、図３の破線矢印に示すように、発光素子35の光が発光素子35の近傍位置から導光板15の表面部25へ向い、導光板15内を他端側へ向けて導光されずに、導光板15の表面部25から輝線となって出射しやすい。   When there is no reflecting plate 41, the light from the light emitting element 35 is directed from the vicinity of the light emitting element 35 toward the surface portion 25 of the light guide plate 15 as shown by the broken line arrow in FIG. Thus, the light is easily emitted as a bright line from the surface portion 25 of the light guide plate 15 without being guided.

反射板41がある場合、図３の実線矢印に示すように、発光素子35の光は、すべて導光板15の入射面30に入射され、導光板15内を他端側へ向けて導光されやすい。   When the reflecting plate 41 is present, as shown by the solid line arrow in FIG. 3, all of the light from the light emitting element 35 enters the incident surface 30 of the light guide plate 15 and is guided toward the other end side in the light guide plate 15. Cheap.

図４には、例えば、導光板15が円形で導光板15に設ける溝部29が四角形である場合の発光面の輝度分布図を示す。図４(a)は反射板41がある場合の発光面28の照度分布図、図４(b)は反射板41がない場合の発光面28の照度分布図である。図４(b)に示すように、反射板41がない場合、発光面28に溝部29の形状に一致した輝線Ａが出るため、発光面28の均斉度が低下する。それに対して、図４(a)に示すように、反射板41がある場合、発光面28に輝線が出ないため、発光面28の均斉度を向上でき、しかも、導光板15内を他端側へ向けて導光される光を増加させ、端面部27から出射する光を増加でき、照明装置10の周囲をより明るくできる。   FIG. 4 shows a luminance distribution diagram of the light emitting surface when, for example, the light guide plate 15 is circular and the groove 29 provided in the light guide plate 15 is square. FIG. 4A is an illuminance distribution diagram of the light emitting surface 28 when the reflecting plate 41 is present, and FIG. 4B is an illuminance distribution diagram of the light emitting surface 28 when the reflecting plate 41 is not present. As shown in FIG. 4B, when there is no reflector 41, the bright line A corresponding to the shape of the groove 29 appears on the light emitting surface 28, so that the uniformity of the light emitting surface 28 decreases. On the other hand, as shown in FIG. 4 (a), when there is a reflector 41, no bright line appears on the light emitting surface 28, so that the uniformity of the light emitting surface 28 can be improved and the light guide plate 15 is connected to the other end. The light guided toward the side can be increased, the light emitted from the end face portion 27 can be increased, and the surroundings of the lighting device 10 can be brightened.

なお、図３に示すように、導光板15の端面部27は、表面部25および背面部26に対して略垂直な面でもよい。この場合、端面部27に拡散手段32を設けることにより、光を上方へも出射させることができる。   As shown in FIG. 3, the end surface portion 27 of the light guide plate 15 may be a surface substantially perpendicular to the front surface portion 25 and the back surface portion 26. In this case, the light can be emitted upward by providing the diffusing means 32 on the end surface portion 27.

次に、図５に第３の実施形態を示す。なお、各実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 5 shows a third embodiment. In addition, about the same structure and effect as each embodiment, the description is abbreviate | omitted using the same code | symbol.

反射手段40を、導光板15の表面部25に対向する溝部29の内面に設ける。反射手段40としては、例えば、その溝部29の内面に反射材を塗布した反射層を用いてもよいし、反射板を配置するようにしてもよい。   The reflection means 40 is provided on the inner surface of the groove portion 29 facing the surface portion 25 of the light guide plate 15. As the reflection means 40, for example, a reflection layer in which a reflection material is applied to the inner surface of the groove 29 may be used, or a reflection plate may be disposed.

この場合にも、反射手段40がない場合、図５の破線矢印で示すように、導光板15の表面部25から輝線となって出射しやすい。   Also in this case, when there is no reflecting means 40, it is easy to emit as a bright line from the surface portion 25 of the light guide plate 15 as shown by the broken line arrow in FIG.

反射手段40があることにより、図５の実線矢印に示すように、発光素子35の光は、すべて導光板15の入射面30に入射し、導光板15内を他端側へ向けて導光されやすい。   Due to the presence of the reflecting means 40, as indicated by the solid line arrow in FIG. 5, all the light from the light emitting element 35 is incident on the incident surface 30 of the light guide plate 15 and guided through the light guide plate 15 toward the other end. Easy to be.

次に、図６に第４の実施形態を示す。なお、各実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 6 shows a fourth embodiment. In addition, about the same structure and effect as each embodiment, the description is abbreviate | omitted using the same code | symbol.

導光板15の表面部25に対向する溝部29の内面に拡散手段44を設ける。拡散手段44は、例えば、その溝部29の内面をブラスト処理して面散乱特性を持たせてもよいし、拡散板を配置するようにしてもよい。   A diffusion means 44 is provided on the inner surface of the groove 29 facing the surface portion 25 of the light guide plate 15. For example, the diffusing means 44 may have a surface scattering characteristic by blasting the inner surface of the groove 29, or may be provided with a diffusing plate.

この場合にも、拡散手段44がない場合、図６の破線矢印で示すように、導光板15の表面部25から輝線となって出射しやすい。   Also in this case, when there is no diffusing means 44, it is easy to emit as a bright line from the surface portion 25 of the light guide plate 15 as shown by the broken line arrow in FIG.

拡散手段44があることにより、図６の実線矢印に示すように、導光板15の表面部25に対向する溝部29の内面に向った発光素子35の光は、拡散手段44で拡散されて導光板15内に入射し、導光板15内を導光されやすい。拡散手段44を通じて導光板15内に入射した光の一部は、近傍に位置する端面部27に向い、端面部27から出射する光が増加する。   Due to the presence of the diffusing means 44, the light from the light emitting element 35 toward the inner surface of the groove 29 facing the surface portion 25 of the light guide plate 15 is diffused by the diffusing means 44 and guided as shown by the solid arrows in FIG. The light enters the light plate 15 and is easily guided through the light guide plate 15. Part of the light that has entered the light guide plate 15 through the diffusing means 44 is directed to the end surface portion 27 located in the vicinity, and the light emitted from the end surface portion 27 increases.

また、照明装置10の点灯時および消灯時とも、導光板15の表面部25側を見た場合、拡散手段44によって発光素子35の存在が見えるのを低減できる。   In addition, when the lighting device 10 is turned on and off, it is possible to reduce the presence of the light emitting element 35 by the diffusion means 44 when the surface portion 25 side of the light guide plate 15 is viewed.

次に、図７に第５の実施形態を示す。なお、各実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 7 shows a fifth embodiment. In addition, about the same structure and effect as each embodiment, the description is abbreviate | omitted using the same code | symbol.

導光板15の背面部26がシャーシ14に取り付けられ、溝部29の背面側にシャーシ14が配置されている。この溝部29内に臨むシャーシ14の部分に光を吸収する吸収手段47を設ける。吸収手段47は、例えば、黒色塗装によって吸収層を形成する。   The back surface portion 26 of the light guide plate 15 is attached to the chassis 14, and the chassis 14 is disposed on the back surface side of the groove portion 29. Absorbing means 47 for absorbing light is provided in the portion of the chassis 14 facing the groove 29. The absorption means 47 forms an absorption layer by black coating, for example.

吸収手段47がない場合、図７の破線矢印で示すように、発光素子35から出てシャーシ14で反射した光が発光素子35の近傍位置から導光板15の表面部25へ向い、導光板15内を導光されずに、導光板15の表面部25から輝線となって出射しやすい。   In the absence of the absorbing means 47, as indicated by the broken line arrow in FIG. 7, the light that has exited from the light emitting element 35 and reflected by the chassis 14 travels from the vicinity of the light emitting element 35 toward the surface portion 25 of the light guide plate 15, The light is easily emitted as a bright line from the surface portion 25 of the light guide plate 15 without being guided through the inside.

吸収手段47があることにより、シャーシ14に向った発光素子35の光は、吸収手段47で吸収されて反射量が低減され、導光板15の表面部25から輝線が出るのを低減できる。   Due to the presence of the absorbing means 47, the light of the light emitting element 35 directed toward the chassis 14 is absorbed by the absorbing means 47, the amount of reflection is reduced, and emission of bright lines from the surface portion 25 of the light guide plate 15 can be reduced.

なお、反射手段40、拡散手段44および吸収手段47は、任意に組み合わせて用いてもよい。   The reflecting means 40, the diffusing means 44, and the absorbing means 47 may be used in any combination.

次に、図８に第６の実施形態を示す。なお、各実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 8 shows a sixth embodiment. In addition, about the same structure and effect as each embodiment, the description is abbreviate | omitted using the same code | symbol.

導光板15の背面部26側に設けられる溝部29は、外周囲が開口された溝形状でもよい。   The groove portion 29 provided on the back surface portion 26 side of the light guide plate 15 may have a groove shape with an outer periphery opened.

次に、図９に第７の実施形態を示す。なお、各実施形態と同じ構成および作用効果については同じ符号を用いてその説明を省略する。   Next, FIG. 9 shows a seventh embodiment. In addition, about the same structure and effect as each embodiment, the description is abbreviate | omitted using the same code | symbol.

第６の実施形態と同様に、導光板15の背面部26側に設けられる溝部29の外周囲が開口された溝形状の場合に、表面部25側が溝部29側より外端側に突出するように端面部27を傾斜面あるいは曲面に形成する。例えば、導光板15の表面部25からの光出射方向（表面部25に垂直な方向）に対して４０°傾斜した傾斜面とする。   Similarly to the sixth embodiment, in the case of a groove shape in which the outer periphery of the groove portion 29 provided on the back surface portion 26 side of the light guide plate 15 is opened, the surface portion 25 side protrudes from the groove portion 29 side to the outer end side. The end surface portion 27 is formed into an inclined surface or a curved surface. For example, the inclined surface is inclined by 40 ° with respect to the light emission direction from the surface portion 25 of the light guide plate 15 (direction perpendicular to the surface portion 25).

これにより、導光部31を通じて端面部27に到達した光の一部を表面部25側に反射させて出射させるとともに、光の一部を端面部27から側方や上方へ出射させる。   Thereby, a part of the light reaching the end surface part 27 through the light guide part 31 is reflected and emitted to the surface part 25 side, and a part of the light is emitted from the end surface part 27 to the side or upward.

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

10 照明装置
14 シャーシ
15 導光板
25 表面部
26 背面部
27 端面部
29 溝部
30 入射面
31 導光部
35 発光素子
35a 発光部
40 反射手段
44 拡散手段
47 吸収手段 10 Lighting equipment
14 Chassis
15 Light guide plate
25 Surface
26 Rear side
27 End face
29 Groove
30 Incident surface
31 Light guide
35 Light emitting element
35a Light emitter
40 Reflection means
44 Diffusion means
47 Absorption means

Claims (6)

表面部、表面部に対して反対側の背面部、および背面部側に設けられた溝部を有する導光板と；
導光板の溝部に配置された発光素子と；
を具備していることを特徴とする照明装置。 A light guide plate having a front surface portion, a back surface portion opposite to the front surface portion, and a groove portion provided on the back surface portion side;
A light emitting element disposed in a groove of the light guide plate;
An illumination device comprising: 前記導光板には、導光板の溝部より外端側に導光板の端面部が設けられているとともに、導光板の溝部より導光板の表面部側に導光板の端面部に連続する導光部が設けられている
ことを特徴とする請求項１記載の照明装置。 The light guide plate is provided with an end surface portion of the light guide plate on the outer end side from the groove portion of the light guide plate, and is continuous with the end surface portion of the light guide plate on the surface portion side of the light guide plate from the groove portion of the light guide plate. The lighting device according to claim 1, wherein the lighting device is provided. 導光板の溝部は、導光板の周辺部に設けられているとともに、導光板の中央側に対向する溝部の内面に入射面を有し、
発光素子は、発光部を有し、導光板の溝部内で発光部が入射面に対向するように配置されている
ことを特徴とする請求項１または２記載の照明装置。 The groove portion of the light guide plate is provided in the peripheral portion of the light guide plate, and has an incident surface on the inner surface of the groove portion facing the center side of the light guide plate,
The lighting device according to claim 1, wherein the light emitting element has a light emitting portion, and is disposed so that the light emitting portion faces the incident surface in the groove portion of the light guide plate. 導光板の表面部に対向する溝部の内面側へ向う発光素子からの光を入射面へ反射させる反射手段を具備している
ことを特徴とする請求項３記載の照明装置。 The illuminating device according to claim 3, further comprising reflecting means for reflecting light from the light emitting element toward the inner surface side of the groove portion facing the surface portion of the light guide plate to the incident surface. 導光板の表面部に対向する溝部の内面側へ向う発光素子からの光を拡散させる拡散手段を具備している
ことを特徴とする請求項３記載の照明装置。 The illuminating device according to claim 3, further comprising diffusion means for diffusing light from the light emitting element toward the inner surface side of the groove portion facing the surface portion of the light guide plate. 導光板の背面側を取り付けたシャーシと；
シャーシへ向う発光素子からの光を吸収する吸収手段と；
を具備していることを特徴とする請求項３記載の照明装置。 A chassis with the back side of the light guide plate attached;
An absorbing means for absorbing light from the light emitting element toward the chassis;
The lighting device according to claim 3, comprising:
JP2013053630A 2013-03-15 2013-03-15 Lighting device Pending JP2014179283A (en)

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TW102133570A TW201435260A (en) 2013-03-15 2013-09-17 Illumination apparatus

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JP2017076463A (en) * 2015-10-13 2017-04-20 大日本印刷株式会社 Luminaire

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JP7108939B2 (en) * 2018-02-27 2022-07-29 パナソニックＩｐマネジメント株式会社 lighting equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017076463A (en) * 2015-10-13 2017-04-20 大日本印刷株式会社 Luminaire

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