JP2010262742A - Led illumination device - Google Patents

Led illumination device Download PDF

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JP2010262742A
JP2010262742A JP2009110278A JP2009110278A JP2010262742A JP 2010262742 A JP2010262742 A JP 2010262742A JP 2009110278 A JP2009110278 A JP 2009110278A JP 2009110278 A JP2009110278 A JP 2009110278A JP 2010262742 A JP2010262742 A JP 2010262742A
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led
light source
source module
led light
light
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Daisuke Nitta
大輔 新田
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Kowa Co Ltd
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Kowa Co Ltd
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Priority to JP2009110278A priority Critical patent/JP2010262742A/en
Priority to PCT/JP2010/056767 priority patent/WO2010125927A1/en
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    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/04—Fastening of light sources or lamp holders with provision for changing light source, e.g. turret
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • 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
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • 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
    • G02B6/009—Positioning aspects of the light source in the package
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0045—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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
    • F21Y2105/00—Planar light sources
    • 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]
    • 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]

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED illumination device using an LED light source module which is easily constituted while facilitating replacement of an LED light source. <P>SOLUTION: The LED illumination device (170) configured to irradiate the end faces of a plurality of stacked light guide plates with irradiation light emitted from LEDs to emit light from the light emitting surfaces of the light guide plates includes an LED light source module 150 which contains a plurality of LED light sources, and is slidably and detachably attached to a storage portion of the LED illumination device body. The LED light source module 150 is equipped with: electrodes (131, 132) to which electric current is supplied from the LED illumination device body to light up the LED light sources; and a heat-transfer element (140) for releasing the heat of the LED light sources toward the LED illumination device body. The LED light source module 150 is engaged with the LED illumination device body by an engagement means so that the LED light sources are accurately positioned in predetermined positions within the illumination device body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、複数枚重ねた導光板の側面から、ＬＥＤを光源とする照射光を照射して前記導光板の発光面から発光させるＬＥＤ照明装置に関する。   The present invention relates to an LED lighting device that emits light from a light emitting surface of a light guide plate by irradiating irradiation light using an LED as a light source from a side surface of a plurality of light guide plates stacked.

従来より、導光板（あるいは拡散板）およびＬＥＤ光源を使用した照明装置が提案されている。このような装置には、作業者の手元を照明するための室内用の照明装置のほか、ＬＣＤバックライトや、スライド写真、トランスパレンシー観察用のライトボックスのような製品なども含まれる。   Conventionally, an illumination device using a light guide plate (or a diffusion plate) and an LED light source has been proposed. Such devices include products such as LCD backlights, slide photographs, and light boxes for observation of transparency, in addition to indoor lighting devices for illuminating the hands of workers.

ＬＥＤ光源とともに導光板を使用する最大の特徴は、発光面に対して光源のＬＥＤの光を導光板の側面から入射することが可能である点で、これにより製品の薄型化が可能となる。また、その他の特徴として、導光板を重ねることで導光板に設けられた微細加工部の分布密度が見かけ上増すことになり、単数枚の導光板と比較して発光面の光量が増大するという特徴がある（たとえば下記の特許文献１、図４）。   The greatest feature of using the light guide plate together with the LED light source is that light of the LED of the light source can be incident on the light emitting surface from the side surface of the light guide plate, which makes it possible to reduce the thickness of the product. In addition, as another feature, by superimposing the light guide plate, the distribution density of the finely processed portion provided on the light guide plate is apparently increased, and the light amount of the light emitting surface is increased as compared with a single light guide plate. There are features (for example, Patent Document 1 and FIG. 4 below).

また、ＬＥＤ光源は定格寿命が長く、たとえば典型的なＬＥＤ電球の製品は、定格寿命が２００００時間前後に及ぶものがあり、一般に白熱電球よりも長寿命である、という特徴がある。   In addition, LED light sources have a long rated life. For example, typical LED bulb products have a rated life of about 20000 hours, and generally have a longer life than incandescent bulbs.

しかし、いくら長寿命であっても使用環境によってはＬＥＤが劣化しやすい状況も考えられる（例えば高温環境下など）ため、ＬＥＤ照明装置は白熱電球照明に比べて高価格であるため、ＬＥＤ光源のみを交換可能とした照明装置も開示されている（たとえば下記の特許文献２）。   However, even if the lifetime is long, depending on the usage environment, the LED may easily deteriorate (for example, in a high-temperature environment). Therefore, the LED lighting device is more expensive than incandescent bulb lighting, so only the LED light source An illuminating device that can be replaced is also disclosed (for example, Patent Document 2 below).

特願２００８−２９３７５２号公報Japanese Patent Application No. 2008-293752 特開２００７−５９２０２号公報JP 2007-59202 A

上記特許文献２に記載されるようにＬＥＤ光源を交換可能とする場合、単に個々のＬＥＤ光源を交換できるようにしただけでは、一般にＬＥＤ光源には小さいものが多く、また白熱球のような着脱構造を持たないものが多いし、また、ＬＥＤ照明装置の場合、多数のＬＥＤ光源が用いられるから、交換作業が困難で面倒なものになりがちである。そこで、複数のＬＥＤ光源をユニット化して着脱式のＬＥＤ光源モジュールとして構成するような構造が考えられる。   When the LED light source can be replaced as described in Patent Document 2, there are generally many LED light sources that are simply replaced, and the LED light source can be attached and detached like an incandescent bulb. Many of them do not have a structure, and in the case of an LED lighting device, since a large number of LED light sources are used, replacement work tends to be difficult and troublesome. Therefore, a structure in which a plurality of LED light sources are unitized to form a detachable LED light source module is conceivable.

このような着脱式のＬＥＤ光源モジュールを用いる構造では次のような技術課題が予想される。   In the structure using such a detachable LED light source module, the following technical problems are expected.

まず、導光板を用いたＬＥＤ照明装置では、複数枚重ねた導光板の側面からＬＥＤを光源とする照射光を照射して導光板の発光面から発光させるものがある。このような構成においては、発光面からの発光量は複数枚重ねた導光板の側面とＬＥＤの位置関係に大きく影響される。ＬＥＤ光が導光板側面から漏れていると、その漏れた光は他に反射する要素が無い限り発光面まで届かなくなってしまう。したがって、交換可能なＬＥＤ光源モジュールを用いた照明装置を製造する際には、複数枚重ねた導光板とＬＥＤの位置を正しく設定できなければならない。   First, some LED illumination devices using a light guide plate emit light from the light emitting surface of the light guide plate by irradiating irradiation light using LEDs as light sources from the side surfaces of the plurality of light guide plates stacked. In such a configuration, the amount of light emitted from the light emitting surface is greatly affected by the positional relationship between the side surface of the light guide plate and the LEDs that are stacked in plurality. If the LED light leaks from the side surface of the light guide plate, the leaked light will not reach the light emitting surface unless there are other elements to reflect. Therefore, when manufacturing an illuminating device using a replaceable LED light source module, it is necessary to correctly set the positions of a plurality of light guide plates and LEDs that are stacked.

また、通常可視光の照明装置に用いられるＬＥＤは赤外光を発しないため、蛍光灯や白熱灯が赤外光で放熱しているのと比較して、発生した熱が光によって放出されない分、蛍光灯や白熱灯よりも発光部に熱がこもり易く、このため発光部に放熱手段（熱伝導部材）を設ける必要がある。ＬＥＤ照明装置にＬＥＤ光源モジュールを用いる場合には、このような放熱手段が体裁よく組み込まれていなければならない。   In addition, since LEDs used in ordinary visible light illumination devices do not emit infrared light, the generated heat is not emitted by light compared to fluorescent and incandescent lamps that dissipate infrared light. Therefore, heat is more likely to be accumulated in the light emitting part than fluorescent lamps and incandescent lamps. For this reason, it is necessary to provide heat radiating means (heat conducting member) in the light emitting part. When the LED light source module is used in the LED lighting device, such a heat radiating means must be well built.

また、従来のＬＥＤ照明はその長寿命の性質からメンテナンスフリーであり、小型組み込み式が可能であるため部品交換を考慮されないものが多い。しかし産業用途においては定格寿命が有限である以上交換は必須であり、また、新品であってもＬＥＤが不良品だったり、予期せぬ衝撃などで故障した場合などが想定されるため、簡単な部品交換で修理対応できるようにする必要がある。また、電気的仕様が同じであれば、メーカにかかわらず同等の電気回路構成で異なる仕様のＬＥＤ、たとえば、色温度の異なるＬＥＤなどを使用できることも多く、ユーザが１つの機器でＬＥＤ照明の仕様を簡単に変更できることはメリットである。したがって、ＬＥＤ照明装置のＬＥＤ光源モジュールは、着脱が極めて容易に行なえなければならない。   In addition, conventional LED lighting is maintenance-free due to its long life and can be built in a small size, so there are many cases where parts replacement is not considered. However, in industrial applications, replacement is indispensable as long as the rated life is limited, and even if it is new, it is assumed that the LED is defective or if it has failed due to unexpected impact, etc. It is necessary to be able to handle repairs by replacing parts. In addition, if the electrical specifications are the same, it is often possible to use LEDs of different specifications with the same electrical circuit configuration regardless of the manufacturer, for example, LEDs with different color temperatures. It is an advantage that can be easily changed. Therefore, the LED light source module of the LED lighting device must be able to be attached and detached very easily.

本発明の課題は、以上に鑑み、ＬＥＤ光源の交換が容易で簡単安価に構成可能なＬＥＤ光源モジュールを用いたＬＥＤ照明装置を提供することにある。   In view of the above, an object of the present invention is to provide an LED lighting device using an LED light source module that can be easily replaced at low cost.

以上の課題を解決するため、本発明においては、複数枚重ねて配置した導光板の端面からＬＥＤを光源とする照射光を照射して前記導光板の発光面から発光させるＬＥＤ照明装置であって、ＬＥＤ照明装置本体、および、複数のＬＥＤ光源を収容し、前記ＬＥＤ照明装置本体の収容部に対してスライド着脱可能なＬＥＤ光源モジュールから成る構成を採用した。   In order to solve the above-described problems, in the present invention, an LED illumination apparatus that emits light emitted from an LED as a light source from an end face of a light guide plate arranged in a plurality of layers and emits light from the light emitting surface of the light guide plate. The LED illumination device main body and a plurality of LED light sources are housed, and the LED light source module is slidably attached to the housing portion of the LED illumination device main body.

あるいはさらに、前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体から前記ＬＥＤ光源を点灯させるための電流の供給を受ける電極を有する構成を採用した。   Alternatively, a configuration in which the LED light source module has an electrode that receives supply of current for turning on the LED light source from the LED lighting device body is adopted.

あるいはさらに、前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体に対して前記ＬＥＤ光源の熱を放熱するための熱伝導体を含む構成を採用した。   Alternatively, a configuration in which the LED light source module includes a heat conductor for radiating heat of the LED light source to the LED lighting device main body is adopted.

あるいはさらに、前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体の収容部に設けた係合手段と互いに係合する係合手段を有し、これら係合手段の両者の係合によって前記ＬＥＤ光源が前記導光板の端面に所期の位置関係で整合するよう位置決めされる構成を採用した。   Alternatively, the LED light source module further includes an engaging means that engages with an engaging means provided in a housing portion of the LED lighting device body, and the LED light source is A configuration is adopted in which the light guide plate is positioned so as to align with the end face of the light guide plate in the desired positional relationship.

上記構成によれば、複数枚重ねて配置した導光板の端面からＬＥＤを光源とする照射光を照射して前記導光板の発光面から発光させる方式のＬＥＤ照明装置を、ＬＥＤ照明装置本体、および、複数のＬＥＤ光源を収容し、前記ＬＥＤ照明装置本体の収容部に対してスライド着脱可能なＬＥＤ光源モジュールから成る構成とすることにより、ＬＥＤ光源の交換が容易で簡単安価に構成可能なＬＥＤ照明装置を提供することができる。   According to the above configuration, the LED illumination device of the type that emits light emitted from the light emitting surface of the light guide plate by irradiating the light emitted from the LED as the light source from the end surface of the light guide plate arranged in a plurality of layers, and the LED illumination device main body, and The LED illumination can be easily and inexpensively replaced by accommodating a plurality of LED light sources and comprising an LED light source module that can be slidably attached to the housing of the LED illumination device main body. An apparatus can be provided.

また、プラグイン方式の前記ＬＥＤ光源モジュールに前記ＬＥＤ照明装置本体から前記ＬＥＤ光源を点灯させるための電流の供給を受ける電極を設けることにより配線作業を必要とせずにＬＥＤ光源モジュールに容易に着脱することができる。   Moreover, the plug-in type LED light source module is provided with an electrode for receiving a current supply for turning on the LED light source from the LED lighting device main body, so that it can be easily attached to and detached from the LED light source module without requiring wiring work. be able to.

また、前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体に対して前記ＬＥＤ光源の熱を放熱するための熱伝導体を含む構成とすることにより、ＬＥＤ光源の熱を放熱することができ、ＬＥＤ光源の寿命を延長することができ、耐久性に優れたＬＥＤ照明装置を提供することができる。   The LED light source module includes a heat conductor for dissipating heat of the LED light source with respect to the LED lighting device body, whereby the heat of the LED light source can be dissipated. Thus, it is possible to provide an LED lighting device with excellent durability.

また、前記ＬＥＤ光源モジュールと前記ＬＥＤ照明装置本体の収容部に互いに係合する係合手段を有し、これら係合手段の両者の係合によってＬＥＤ光源を前記導光板の端面に所期の位置関係で整合するよう位置決めすることができるため、導光板の発光面からの光量が増大し、設計通りの照明光量を得ることができ、また、製品ごとに光量がばらつくなどの問題を回避することができる。   In addition, the LED light source module and the LED lighting device main body have engaging means that engage with each other, and the LED light source is positioned on the end face of the light guide plate by engaging both the engaging means. Because it can be positioned so as to match with each other, the amount of light from the light-emitting surface of the light guide plate can be increased, the illumination light amount as designed can be obtained, and problems such as variations in the amount of light from product to product can be avoided. Can do.

本発明を採用したＬＥＤ照明装置のＬＥＤ光源モジュールを前方から示した斜視図である。It is the perspective view which showed the LED light source module of the LED lighting apparatus which employ | adopted this invention from the front. 本発明を採用したＬＥＤ照明装置のＬＥＤ光源モジュールを後方から示した斜視図である。It is the perspective view which showed the LED light source module of the LED lighting apparatus which employ | adopted this invention from back. 本発明を採用したＬＥＤ照明装置の構造を示した斜視図である。It is the perspective view which showed the structure of the LED lighting apparatus which employ | adopted this invention. 本発明を採用したＬＥＤ照明装置の内部構造を示した断面図である。It is sectional drawing which showed the internal structure of the LED lighting apparatus which employ | adopted this invention.

以下、図面に示す実施例に基づいて本発明を説明する。   Hereinafter, the present invention will be described based on embodiments shown in the drawings.

図３に本発明を採用したＬＥＤ照明装置の全体構造を、また、図１および図２に図４のＬＥＤ照明装置に用いられる着脱式のＬＥＤ光源モジュールの構造をそれぞれ斜視図として示す。また、図４は図３のＬＥＤ照明装置の内部構造を断面図として示したものである。   FIG. 3 is a perspective view showing the overall structure of an LED lighting device employing the present invention, and FIGS. 1 and 2 are perspective views showing the structure of a detachable LED light source module used in the LED lighting device of FIG. FIG. 4 shows the internal structure of the LED lighting device of FIG. 3 as a cross-sectional view.

図３のＬＥＤ照明装置は、室内照明用のスタンド照明１７０として構成されており、図示のようにアームで支持されたスタンド照明１７０の本体部下面には発光面１８０が形成されている。この発光面１８０は、後述の導光板（２０）をスタンド照明１７０の本体部下面に露出させて構成したものである。   The LED lighting device of FIG. 3 is configured as a stand lighting 170 for room lighting, and a light emitting surface 180 is formed on the lower surface of the main body of the stand lighting 170 supported by an arm as shown. The light emitting surface 180 is configured by exposing a light guide plate (20), which will be described later, to the lower surface of the main body of the stand illumination 170.

ＬＥＤ光源モジュール１５０は、図３のようにスタンド照明１７０の本体の適当な位置（図示の例ではアームで支持された後端部）にスライド着脱できるように構成する。   As shown in FIG. 3, the LED light source module 150 is configured to be slidable and detachable at an appropriate position (rear end portion supported by an arm in the illustrated example) of the main body of the stand illumination 170.

ＬＥＤ光源モジュール１５０は図１に前面側を、また図２に背面側を示すように直方体形状に構成する。図１および図２は、図３の例では倒立状態で装着されるＬＥＤ光源モジュール１５０を正立状態で示したものである。   The LED light source module 150 is configured in a rectangular parallelepiped shape as shown in FIG. 1 on the front side and in FIG. 2 on the back side. 1 and 2 show the LED light source module 150 mounted in an inverted state in the example of FIG. 3 in an upright state.

図１および図２に示すようにＬＥＤ光源モジュール１５０の前面側には、複数（図示の例では４個）のＬＥＤ１１０が配列される。これらＬＥＤ１１０はＬＥＤ光源モジュール１５０の下部に配置した基板１２０上に実装される。基板１２０上には必要に応じてＬＥＤ１１０の駆動回路（たとえば電流制限用の抵抗など：不図示）が組み込まれる。   As shown in FIGS. 1 and 2, a plurality (four in the illustrated example) of LEDs 110 are arranged on the front side of the LED light source module 150. These LEDs 110 are mounted on a substrate 120 disposed under the LED light source module 150. A driving circuit (for example, a current limiting resistor: not shown) of the LED 110 is incorporated on the substrate 120 as necessary.

基板１２０の上部は、ＬＥＤ光源モジュール１５０の上面のほぼコの字型の部分を形成するよう形成された熱伝導体１４０として構成されている。熱伝導体１４０の左右両端の上部は、スタンド照明１７０に対するスライド着脱を容易にするための面取り部が形成されている。熱伝導体１４０は耐熱性のあるプラスチックや、あるいは金属などから構成することができる。ただし、熱伝導体１４０の左右両端の角部にそれぞれ接点電極１３１、１３２を配置するため、熱伝導体１４０に金属などの材質を用いる場合には左右の接点電極１３１、１３２が短絡しないように熱伝導体１４０と接点電極１３１、１３２との間に絶縁材料などを配置する必要がある。   The upper part of the substrate 120 is configured as a heat conductor 140 formed so as to form a substantially U-shaped portion of the upper surface of the LED light source module 150. Chamfered portions for facilitating slide attachment / detachment with respect to the stand lighting 170 are formed at the upper left and right ends of the heat conductor 140. The heat conductor 140 can be made of heat-resistant plastic or metal. However, since the contact electrodes 131 and 132 are disposed at the left and right corners of the heat conductor 140, respectively, when using a material such as metal for the heat conductor 140, the left and right contact electrodes 131 and 132 are not short-circuited. It is necessary to dispose an insulating material or the like between the heat conductor 140 and the contact electrodes 131 and 132.

図２に示すように、ＬＥＤ光源モジュール１５０の背面はプラスチックなどから構成された背面板となっており、この部分にはガイド溝１６０を設けてある（図示の例では２条）。なお、ガイド溝１６０を設けた背面板の部分も上記の熱伝導体１４０と一体に構成するようにしてもよい。   As shown in FIG. 2, the back surface of the LED light source module 150 is a back plate made of plastic or the like, and a guide groove 160 is provided in this portion (in the illustrated example, two strips). Note that the portion of the back plate provided with the guide groove 160 may be configured integrally with the heat conductor 140.

スタンド照明１７０側の装着部としては、図１および図２に示したＬＥＤ光源モジュール１５０を収容するための収容部としてＬＥＤ光源モジュール１５０の外形よりもわずかに大きな内寸で構成された収容口を設け、その内部には上記のガイド溝１６０に係合する凸条を配置する。このようなスタンド照明１７０の収容口の内部構造は、ＬＥＤ光源モジュール１５０をスライド装着した場合、各ＬＥＤ１１０の位置が後述の各導光板に効率よく光を照射できる位置に整合するように設けておく。また、スタンド照明１７０の収容口内部には、ＬＥＤ光源モジュール１５０の接点電極１３１、１３２と接触する電極を設け、ＬＥＤ点灯用の電源を供給するのはいうまでもない。   As the mounting portion on the stand illumination 170 side, a storage opening configured to have an inner dimension slightly larger than the outer shape of the LED light source module 150 as a storage portion for storing the LED light source module 150 shown in FIGS. Protruding lines that are provided and engage with the guide grooves 160 are disposed therein. The internal structure of the storage opening of the stand illumination 170 is provided so that the position of each LED 110 is aligned with the position where each light guide plate described later can be efficiently irradiated with light when the LED light source module 150 is slid. . Further, it goes without saying that an electrode that contacts the contact electrodes 131 and 132 of the LED light source module 150 is provided inside the accommodation opening of the stand illumination 170 to supply power for LED lighting.

なお、熱伝導体４に関しては、熱伝導体１４０に蓄積された熱がスタンド照明１７０本体に伝わりやすいよう、ＬＥＤ光源モジュール１５０の熱伝導体部１４０として熱伝導性のある弾性体を用い、スタンド照明１７０の本体との間に隙間なく接するよう構成し、スタンド照明１７０の本体に熱が伝わるようにしてもよい。あるいはこのような弾性体はスタンド照明１７０の収容口の内部に設けてもよい。また、熱伝導体部１４０から伝わった熱を放熱するための放熱板、ヒートシンク、放熱孔などの放熱手段をスタンド照明１７０の本体側に設けるようにしてもよい。このような放熱構造を設けることにより、効率よくＬＥＤ光源モジュール１５０から放熱することができ、ＬＥＤ１１０の寿命を延長することができる。   As for the heat conductor 4, a heat conductive elastic body is used as the heat conductor portion 140 of the LED light source module 150 so that the heat accumulated in the heat conductor 140 is easily transferred to the stand illumination 170 main body. It may be configured so as to be in contact with the main body of the lighting 170 without a gap, and heat may be transmitted to the main body of the stand lighting 170. Alternatively, such an elastic body may be provided inside the accommodation opening of the stand lighting 170. Further, a heat radiating means such as a heat radiating plate, a heat sink, and a heat radiating hole for radiating heat transferred from the heat conductor 140 may be provided on the main body side of the stand lighting 170. By providing such a heat dissipation structure, heat can be efficiently radiated from the LED light source module 150, and the life of the LED 110 can be extended.

図４は、スタンド照明１７０の内部構造の一例、特に導光板の配置を示したものである。図４の構造は、３枚の導光板２０、２１、２２を積層したものである。このうち、導光板２０は図３の発光面１８０としてスタンド照明１７０本体の下面に露出させる。   FIG. 4 shows an example of the internal structure of the stand illumination 170, particularly the arrangement of the light guide plate. The structure of FIG. 4 is obtained by laminating three light guide plates 20, 21, and 22. Among these, the light guide plate 20 is exposed as the light emitting surface 180 of FIG.

導光板２０、２１、２２は、光透過性の高い材料、たとえば、透明なアクリル樹脂から形成され、その出射面の反対側の面には、凹状の微細形状の反射部２０ｅ、２０ｅ…が複数個点在するように配置される。   The light guide plates 20, 21, and 22 are made of a highly light-transmitting material, for example, a transparent acrylic resin, and a plurality of concave fine-shaped reflecting portions 20e, 20e,. Arranged to be scattered.

導光板２０、２１、２２は、たとえば金型を用いて射出成形により、微細な反射部２０ｅが碁盤の目状に配列された導光板として形成される。反射部２０ｅは、たとえば導光板２０の厚さを１ｍｍ（ドット密度は約１５０００個／ｃｍ^２）として、大きい方の直径ｄ１が約５５μｍ、小さい方の直径ｄ２が約１０μｍ、高さｄ３が約３０μｍの円錐台形状に形成される（図４は、理解を容易にするため拡大した状態で示してある）。   The light guide plates 20, 21, and 22 are formed as light guide plates in which fine reflecting portions 20e are arranged in a grid pattern, for example, by injection molding using a mold. The reflecting portion 20e has, for example, a thickness of the light guide plate 20 of 1 mm (dot density of about 15000 pieces / cm 2), a larger diameter d1 of about 55 μm, a smaller diameter d2 of about 10 μm, and a height d3. It is formed in a truncated cone shape of about 30 μm (FIG. 4 is shown in an enlarged state for easy understanding).

また、反射部２０ｅは、導光板２０〜２２の１面に均一に配置してもよいが、たとえば導光板の入射部（図の左側）から離れるに従って単位面積あたりの個数が徐々に増大するように配置してもよい。図４に示すように、導光板を複数枚（図４の例では３枚）積層配置したほうが、光の反射回数が増え、光出射面から効率よく光が出射される。   Moreover, although the reflection part 20e may be uniformly arrange | positioned on one surface of the light-guide plates 20-22, the number per unit area increases gradually, for example, as it leaves | separates from the incident part (left side of a figure) of a light-guide plate. You may arrange in. As shown in FIG. 4, when a plurality of light guide plates (three in the example of FIG. 4) are stacked, the number of times of light reflection increases, and light is efficiently emitted from the light exit surface.

図４において符号１０は図１〜図３におけるＬＥＤ光源モジュール１５０に相当し、また、符号１３はその実体的な発光部位（ＬＥＤ１１０）に相当し、この発光部１３が導光板２０〜２２の一端に整合するよう、上記のスライド機構が構成される。なお、図示のように、導光板２０〜２２の重ねあわせの厚みはＬＥＤの発光部位１３よりも若干大きめで、重ね合わせた導光板の中心がＬＥＤ発光部位の中心（ＬＥＤ１１０の中心）と一致するように配置されるのが理想的である。導光板２０〜２２のＬＥＤ光源モジュール１５０とは反対側の他端には、導光板２０〜２２、あるいは導光板２０〜２２の間などから到達した光を導光板２０〜２２方向に再度（再々度…）反射させるための反射板１２が配置される。   4, reference numeral 10 corresponds to the LED light source module 150 in FIGS. 1 to 3, and reference numeral 13 corresponds to a substantial light emitting portion (LED 110). The light emitting portion 13 is one end of the light guide plates 20 to 22. The above-described slide mechanism is configured to match the above. As illustrated, the overlapping thickness of the light guide plates 20 to 22 is slightly larger than the light emitting portion 13 of the LED, and the center of the overlapped light guide plate coincides with the center of the LED light emitting portion (the center of the LED 110). Ideally, they are arranged as follows. At the other end of the light guide plates 20 to 22 opposite to the LED light source module 150, light that has reached from the light guide plates 20 to 22 or between the light guide plates 20 to 22 is again (again, again in the direction of the light guide plates 20 to 22). A reflection plate 12 for reflection is disposed.

以上のような複数の導光板を用いた構造により、効率よく明るいＬＥＤ照明が可能となる。また、ＬＥＤ光源モジュール１５０のガイド溝１６０を用いた位置決め機構によって、ＬＥＤ光源モジュール１５０のＬＥＤ１１０の位置が導光板２０〜２２の光導入部に整合するため、特に、ガイド溝１６０によってＬＥＤ光源モジュール１５０が常に理想的に安定した位置、つまり重ね合わせた導光板の側面の中心がＬＥＤ発光面の中心と一致する位置に配置されるようになるため、導光板２０の発光面からの光量が増大し、設計通りの照明光量を得ることができ、また、製品ごとに光量がばらつくなどの問題を回避することができる。   The structure using the plurality of light guide plates as described above enables efficient LED illumination. In addition, since the position of the LED 110 of the LED light source module 150 is aligned with the light introducing portion of the light guide plates 20 to 22 by the positioning mechanism using the guide groove 160 of the LED light source module 150, the LED light source module 150 is particularly configured by the guide groove 160. Is always placed in an ideally stable position, that is, the center of the side surface of the overlapped light guide plate coincides with the center of the LED light emitting surface, so that the amount of light from the light emitting surface of the light guide plate 20 increases. Thus, the illumination light quantity as designed can be obtained, and the problem that the light quantity varies from product to product can be avoided.

また、ＬＥＤ光源モジュール１５０は、スライド式の着脱機構を介して容易にＬＥＤ照明装置に着脱でき、ＬＥＤの劣化などによって交換が必要となった時や、故障時には、ＬＥＤ光源モジュール１５０がプラグインモジュール化されているので、ＬＥＤ光源モジュール１５０の部分のみを簡単に交換することができる。また、ＬＥＤ照明の仕様を変更したい、たとえばＬＥＤの色温度を変更したい場合などを考慮して、異なるＬＥＤを収容したＬＥＤ光源モジュール１５０を用意しておけば、プラグインモジュール化されたＬＥＤ光源モジュール１５０の部分を交換するだけで、容易にＬＥＤ照明の仕様を変更することができる。したがって、一旦、本実施例のような製品仕様を採用しておけば、ＬＥＤ光源モジュール１５０を用意するだけで大きな製造コストを必要とせずに製品のバリエーションを増やすことができ、製品ラインアップの付加価値を高めることができる。   Further, the LED light source module 150 can be easily attached to and detached from the LED lighting device via a slide-type attaching / detaching mechanism. When the LED light source module 150 needs to be replaced due to deterioration of the LED or in the event of a failure, the LED light source module 150 is plugged in. Therefore, only the portion of the LED light source module 150 can be easily replaced. In addition, if the LED light source module 150 containing different LEDs is prepared in consideration of the case where it is desired to change the specification of the LED illumination, for example, the color temperature of the LED, etc., the LED light source module formed as a plug-in module The specification of the LED illumination can be easily changed by simply replacing 150 parts. Therefore, once the product specifications as in the present embodiment are adopted, it is possible to increase the product variations without requiring a large manufacturing cost simply by preparing the LED light source module 150. Value can be increased.

なお、以上では、ＬＥＤ光源モジュール１５０がガイド溝１６０を、また、このガイド溝１６０と係合するよう突条などをＬＥＤ照明装置本体（スタンド照明１７０）本体の収容部に設けることとしたが、要はＬＥＤ光源モジュール１５０と、ＬＥＤ照明装置本体の収容部に互いに係合する係合手段を設ければよく、これら係合手段の具体的な構成は前記ＬＥＤ光源を前記導光板の端面に所期の位置関係で整合するよう位置決めできるものであれば上記の溝や突条に限定されるものではない。たとえば、ＬＥＤ光源モジュール１５０と、ＬＥＤ照明装置本体（スタンド照明１７０）本体の収容部の溝や突条の凹凸関係は上記と逆であってもよい。   In the above description, the LED light source module 150 is provided with the guide groove 160, and the protrusion or the like so as to engage with the guide groove 160 in the housing portion of the main body of the LED illumination device (stand illumination 170). In short, the LED light source module 150 and an engaging means for engaging with each other in the housing portion of the LED lighting apparatus main body may be provided. The specific configuration of these engaging means is that the LED light source is located on the end face of the light guide plate. The groove and the ridge are not limited to the above as long as they can be positioned so as to be aligned according to the positional relationship. For example, the concave / convex relationship between the groove and the protrusion of the housing portion of the LED light source module 150 and the main body of the LED illumination device (stand illumination 170) may be reversed.

本発明によるＬＥＤ光源モジュールを用いたＬＥＤ照明装置の構成は、上述のようなスタンド照明装置以外にも、ＬＣＤバックライトや、スライド写真、トランスパレンシー観察用のライトボックスのような製品にも実施することができる。   In addition to the stand illumination device as described above, the configuration of the LED illumination device using the LED light source module according to the present invention is also applied to products such as LCD backlights, slide photographs, and light boxes for transparency observation. can do.

１２ 反射板
２０〜２２ 導光板
１１０ ＬＥＤ
１２０ 基板
１３１、１３２ 接点電極
１４０ 熱伝導体
１５０ ＬＥＤ光源モジュール
１６０ ガイド溝
１７０ スタンド照明
１８０ 発光面 12 Reflector 20-22 Light guide plate 110 LED
120 Substrate 131, 132 Contact electrode 140 Thermal conductor 150 LED light source module 160 Guide groove 170 Stand illumination 180 Light emitting surface

Claims (4)

複数枚重ねて配置した導光板の端面からＬＥＤを光源とする照射光を照射して前記導光板の発光面から発光させるＬＥＤ照明装置であって、
ＬＥＤ照明装置本体、および、複数のＬＥＤ光源を収容し、前記ＬＥＤ照明装置本体の収容部に対してスライド着脱可能なＬＥＤ光源モジュールから成ることを特徴とするＬＥＤ照明装置。 An LED illuminating device that emits light emitted from a light-emitting surface of the light guide plate by irradiating irradiation light using an LED as a light source from an end surface of the light guide plate arranged in a plurality of layers,
An LED illumination device comprising: an LED illumination device main body; and an LED light source module that accommodates a plurality of LED light sources and is slidable with respect to a housing portion of the LED illumination device main body. 前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体から前記ＬＥＤ光源を点灯させるための電流の供給を受ける電極を有することを特徴とする請求項１に記載のＬＥＤ照明装置。   The LED lighting device according to claim 1, wherein the LED light source module has an electrode that receives supply of a current for turning on the LED light source from the LED lighting device main body. 前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体に対して前記ＬＥＤ光源の熱を放熱するための熱伝導体を含むことを特徴とする請求項１に記載のＬＥＤ照明装置。   The LED lighting device according to claim 1, wherein the LED light source module includes a heat conductor for radiating heat of the LED light source to the LED lighting device main body. 前記ＬＥＤ光源モジュールが、前記ＬＥＤ照明装置本体の収容部に設けた係合手段と互いに係合する係合手段を有し、これら係合手段の両者の係合によって前記ＬＥＤ光源が前記導光板の端面に所期の位置関係で整合するよう位置決めされることを特徴とする請求項１に記載のＬＥＤ照明装置。   The LED light source module has an engaging means that engages with an engaging means provided in a housing portion of the LED lighting device main body, and the LED light source is attached to the light guide plate by the engagement of both of the engaging means. The LED lighting device according to claim 1, wherein the LED lighting device is positioned so as to be aligned with an end surface in an intended positional relationship.
JP2009110278A 2009-04-30 2009-04-30 Led illumination device Pending JP2010262742A (en)

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