JP2014199758A - Illumination device - Google Patents

Illumination device Download PDF

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JP2014199758A
JP2014199758A JP2013074671A JP2013074671A JP2014199758A JP 2014199758 A JP2014199758 A JP 2014199758A JP 2013074671 A JP2013074671 A JP 2013074671A JP 2013074671 A JP2013074671 A JP 2013074671A JP 2014199758 A JP2014199758 A JP 2014199758A
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light
light source
wavelength selective
selective absorption
lamp
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JP6064283B2 (en
Inventor
哲 山内
Satoru Yamauchi
哲 山内
加津己 渡辺
Katsumi Watanabe
加津己 渡辺
佐智子 土井
Sachiko Doi
佐智子 土井
関井　広行
Hiroyuki Sekii
広行 関井
福田　恒
Hisashi Fukuda
恒 福田
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Panasonic Corp
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Panasonic Corp
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Priority to JP2013074671A priority Critical patent/JP6064283B2/en
Priority to PCT/JP2014/000929 priority patent/WO2014155955A1/en
Priority to CN201480011743.7A priority patent/CN105074326B/en
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    • 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
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • 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
    • F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • 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
    • F21Y2105/10—Planar light sources comprising a two-dimensional 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce occurrence of luminance unevenness and color unevenness of irradiation light and to prevent denaturation of pigment located in the vicinity of a light source part in an illumination device for radiating light in which a predetermined wavelength component is reduced by pigment.SOLUTION: A lamp 2 of an illumination device comprises: a light source part 3; a wavelength selective absorption part 5 including pigment 51 which selectively absorbs light of a predetermined wavelength range; and a planar light guide 4 for guiding light emitted from the light source part 3 toward the inner side of the lamp 2, and deriving it toward the wavelength selective absorption part 5. In this configuration, the light from the light source part 3 is guided inside the planar light guide 4 and then enters the wavelength selective absorption part 5. Therefore, compared with the case where the light from the light source part directly enters the wavelength selective absorption part, the pigment 51 becomes less likely to be exposed to high luminance light and heat from the light source part 3, and also optical path length in the wavelength selective absorption part 5 becomes uniform. Therefore, occurrence of luminance unevenness and color unevenness of the irradiation light can be reduced, and denaturation of the pigment 51 located in the vicinity of the light source part 3 can be prevented.

Description

本発明は、所定波長域の光が低減された光を照射する照明装置に関する。   The present invention relates to an illumination device that emits light with reduced light in a predetermined wavelength range.

従来から、店舗用照明など演出効果が重要視される分野において、被照射体に所定波長域の光が低減された光を照射する照明装置が知られている（例えば、特許文献１参照）。図６（ａ）に示すように、このような照明装置１０は、白色光を出射するＬＥＤ２０と、ＬＥＤ２０からの光を光照射面に向けて反射する反射板３０と、光照射面に設けられ所定波長域の光を選択的に吸収する色素４０を含む波長選択吸収部５０と、を備える。照明装置１０から照射される光は、ＬＥＤ２０より出射された白色光から色素４０によって所定の波長成分が吸収された光となり、例えば、黄色光を吸収する色素４０を用いた場合には、黄色光成分が低減された白色光となる。このような黄色光成分が低減された白色光は、被照射体を鮮やかに見せることが知られている。   2. Description of the Related Art Conventionally, lighting apparatuses that irradiate an object to be irradiated with light in a predetermined wavelength region are known in fields where production effects such as store lighting are important (see, for example, Patent Document 1). As shown to Fig.6 (a), such an illuminating device 10 is provided in the light irradiation surface, LED20 which radiate | emits white light, the reflecting plate 30 which reflects the light from LED20 toward a light irradiation surface, and. A wavelength selective absorption unit 50 including a dye 40 that selectively absorbs light in a predetermined wavelength range. Light emitted from the illumination device 10 is light in which a predetermined wavelength component is absorbed by the dye 40 from the white light emitted from the LED 20. For example, when the dye 40 that absorbs yellow light is used, yellow light is used. It becomes white light with reduced components. It is known that white light in which such yellow light components are reduced makes the irradiated object look vivid.

また、図６（ｂ）に示すように、上記の照明装置１０を基に、反射板を設けず、ＬＥＤ２０を覆うように波長選択吸収部５０をＬＥＤ２０側に突出させた照明装置１０ａも知られている。このような照明装置１０ａでは、ＬＥＤ２０から出射した白色光は、直接に波長選択吸収部５０に入射して、そこで色素４０によって所定の波長成分が低減された後、外部へ照射される。   Further, as shown in FIG. 6B, there is also known an illuminating device 10 a based on the above illuminating device 10, in which a wavelength selective absorbing portion 50 is projected to the LED 20 side so as to cover the LED 20 without providing a reflector. ing. In such an illuminating device 10a, the white light emitted from the LED 20 is directly incident on the wavelength selective absorption unit 50, where a predetermined wavelength component is reduced by the dye 40 and then irradiated to the outside.

特開２０１０−２６７５７１号公報JP 2010-267571 A

しかしながら、上記のような照明装置１０では、ＬＥＤ２０直下における照射光輝度が高くなるので輝度むらが発生し、また、この輝度むらの発生によりＬＥＤ２０直下とその周辺との間で色素４０による光吸収に差が出て色むらが生じる。また、ＬＥＤ２０近傍の色素４０は、ＬＥＤ２０からの高輝度光や熱に強く曝されるので、照明装置１０の長時間使用によって変性して光吸収機能を喪失する虞がある。   However, in the illumination device 10 as described above, the irradiation light luminance directly under the LED 20 is increased, resulting in luminance unevenness, and the occurrence of the luminance unevenness causes light absorption by the dye 40 between the LED 20 and the periphery thereof. Differences occur and uneven color occurs. In addition, since the pigment 40 in the vicinity of the LED 20 is strongly exposed to high-intensity light and heat from the LED 20, there is a possibility that the light absorbing function may be lost due to degeneration due to long-time use of the lighting device 10.

一方、照明装置１０ａでは、上記課題に加えて、ＬＥＤ２０から正面方向に出射された光Ｌ１とＬＥＤ２０から側方に出射された光Ｌ２との間で波長選択吸収部５０における光路長に差が生じる。そのため、光Ｌ１と光Ｌ２との間で色素４０による光吸収に差が生じて色むらが発生する。   On the other hand, in the illumination device 10a, in addition to the above-described problems, a difference occurs in the optical path length in the wavelength selective absorption unit 50 between the light L1 emitted from the LED 20 in the front direction and the light L2 emitted from the LED 20 to the side. . Therefore, a difference occurs in light absorption by the dye 40 between the light L1 and the light L2, and color unevenness occurs.

本発明は、上記課題を解決するものであって、照射光の輝度むら及び色むらの発生を低減することができ、また、光源部の近傍に位置する色素の変性を防止することができる照明装置を提供することを目的とする。   The present invention solves the above-described problem, can reduce the occurrence of uneven brightness and color unevenness of irradiated light, and can prevent denaturation of a pigment located in the vicinity of a light source unit An object is to provide an apparatus.

本発明の照明装置は、光源部と、この光源部から出射された光のうち所定波長域の光を選択的に吸収する波長選択吸収部と、を有する灯具を備え、前記灯具は、平板形状とされ、前記波長選択吸収部は、前記灯具の光照射面に配置され、前記光源部は、前記灯具の外周に沿って配置され、前記光源部から出射された光を前記灯具の内方に向かって導光しつつ前記波長選択吸収部に向けて導出する面状導光体を更に備えたことを特徴とする。   The illumination device of the present invention includes a lamp having a light source unit and a wavelength selective absorption unit that selectively absorbs light in a predetermined wavelength region of light emitted from the light source unit, and the lamp has a flat plate shape. The wavelength selective absorption unit is disposed on the light irradiation surface of the lamp, the light source unit is disposed along the outer periphery of the lamp, and the light emitted from the light source unit is placed inside the lamp. It further comprises a planar light guide that guides toward the wavelength selective absorption part while guiding light toward it.

前記面状導光体は、その中心部が薄肉で且つ前記光源部と相対する周縁部が厚肉となるように形成されていることが好ましい。   It is preferable that the planar light guide is formed such that a central portion thereof is thin and a peripheral portion facing the light source portion is thick.

本照明装置は、前記光源部、波長選択吸収部及び面状導光体を収容し、且つ前記波長選択吸収部からの光を外部に出射させるための開口を有する枠体を更に備え、前記光源は、前記灯具を前記光照射面側から見たときに、前記開口よりも外周側に配置され、前記面状導光体は、前記光源からの光が入射する光入射面に対向する箇所に前記光入射面より入射した光を前記面状導光体の内方に向かって全反射する全反射面を有することが好ましい。   The illumination device further includes a frame body that accommodates the light source unit, the wavelength selective absorption unit, and the planar light guide and has an opening for emitting light from the wavelength selective absorption unit to the outside. Is disposed on the outer peripheral side of the opening when the lamp is viewed from the light irradiation surface side, and the planar light guide is located at a position facing a light incident surface on which light from the light source is incident. It is preferable to have a total reflection surface that totally reflects light incident from the light incident surface toward the inside of the planar light guide.

前記枠体は、前記面状導光体の周縁部に相対する面に光反射面を有することが好ましい。   It is preferable that the frame has a light reflecting surface on a surface facing the peripheral edge of the planar light guide.

前記波長選択吸収部は、波長６００ｎｍに吸収ピークを有するテトラアザポリフィリン系色素を含むことが好ましい。   The wavelength selective absorption part preferably includes a tetraazaporphyrin-based dye having an absorption peak at a wavelength of 600 nm.

本発明によれば、光源部からの光が面状導光体の内部を導光されてから波長選択吸収部に入射するので、光源部からの光が直接に波長選択吸収部に入射する場合に比べて、色素が高輝度光や熱に曝され難くなり、また、波長選択吸収部における光路長が均一になる。そのため、照射光の輝度むら及び色むらの発生を低減することができ、また、光源部の近傍に位置する色素の変性を防止することができる。   According to the present invention, since the light from the light source unit is guided through the planar light guide and then enters the wavelength selective absorption unit, the light from the light source unit directly enters the wavelength selective absorption unit. In comparison with the above, the dye is not easily exposed to high-intensity light or heat, and the optical path length in the wavelength selective absorption section is uniform. Therefore, it is possible to reduce the occurrence of uneven brightness and color unevenness of the irradiation light, and it is possible to prevent the dye located near the light source part from being denatured.

本発明の実施形態に係る照明装置の斜視図。The perspective view of the illuminating device which concerns on embodiment of this invention. 上記照明装置を構成する灯具の断面図。Sectional drawing of the lamp | ramp which comprises the said illuminating device. 上記灯具の分解斜視図。The exploded perspective view of the said lamp. 上記灯具を構成する波長選択吸収部に含まれる色素の化学構造を示す図。The figure which shows the chemical structure of the pigment | dye contained in the wavelength selection absorption part which comprises the said lamp. 上記照明装置から照射される光の分光特性を示す図。The figure which shows the spectral characteristic of the light irradiated from the said illuminating device. （ａ）は従来の照明装置（灯具）の断面図、（ｂ）は別の従来の灯具の断面図。(A) is sectional drawing of the conventional illuminating device (lamp), (b) is sectional drawing of another conventional lamp.

本発明の実施形態に係る照明装置について、図１乃至図５を参照して説明する。図１に示すように、照明装置１は、机上等に置いて用いられる電気スタンドである。照明装置１は、円板形状の灯具２と、灯具２を移動自在に保持するアーム１１と、アーム１１を軸支して机上等に載置されるベース１２と、を備える。灯具２は、その一面（図例で下面）を光が照射される光照射面２Ａとしている。   An illumination device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the lighting device 1 is a desk lamp that is used on a desk or the like. The lighting device 1 includes a disk-shaped lamp 2, an arm 11 that holds the lamp 2 movably, and a base 12 that pivotally supports the arm 11 and is placed on a desk or the like. The lamp 2 has a light irradiation surface 2A on which one surface (the lower surface in the illustrated example) is irradiated with light.

図２及び図３に示すように、灯具２は、灯具２の外周に沿って配置された光源部３と、光源部３から出射された光を灯具２の内方に向かって導光しつつ光照射面２Ａ側に導出する面状導光体４と、を備える。また、灯具２は、光照射面２Ａに配置され所定波長域の光を選択的に吸収する波長選択吸収部５と、光源部３で生じた熱を外部に放熱するための放熱板６と、上記の光源部３、面状導光体４、波長選択吸収部５及び放熱板６を収容する枠体７と、を更に備える。   As shown in FIGS. 2 and 3, the lamp 2 includes a light source unit 3 disposed along the outer periphery of the lamp 2 and guides light emitted from the light source unit 3 toward the inside of the lamp 2. A planar light guide 4 led out to the light irradiation surface 2A side. The lamp 2 is disposed on the light irradiation surface 2A and selectively absorbs light in a predetermined wavelength range, and a heat radiating plate 6 for radiating heat generated by the light source 3 to the outside. The light source unit 3, the planar light guide 4, the wavelength selective absorption unit 5, and the frame body 7 that houses the heat sink 6 are further provided.

枠体７は、上記部材３乃至６を光照射面２Ａ側から覆う鍔部７１と、鍔部７１と係合し部材３乃至６を光照射面２Ａの反対側から覆うケース本体７２と、を有する。鍔部７１は、波長選択吸収部５からの光を外部に出射させるための円形状の開口７３を有する。なお、図３ではケース本体７２の図示を省略している。   The frame body 7 includes a flange 71 that covers the members 3 to 6 from the light irradiation surface 2A side, and a case main body 72 that engages the flange 71 and covers the members 3 to 6 from the opposite side of the light irradiation surface 2A. Have. The collar part 71 has a circular opening 73 for emitting the light from the wavelength selective absorption part 5 to the outside. In addition, illustration of the case main body 72 is abbreviate | omitted in FIG.

光源部３は、複数のＬＥＤ３１と、各々のＬＥＤ３１の光軸が光照射面２Ａに向かうように各ＬＥＤ３１を実装する配線基板３２と、を備える。各々のＬＥＤ３１は、灯具２を光照射面２Ａ側から見たときに枠体７の開口７３よりも外周側で、且つ灯具２の外周に沿って互いに等間隔を置いて環状に配置されている。各ＬＥＤ３１は、主波長４６０ｎｍの青色光（図５も参照）を発する青色ＬＥＤチップ（不図示）と、この青色光により励起され主波長５７５〜６２０ｎｍの黄色光〜橙色光を発する黄色系蛍光体（不図示）と、を有する。各ＬＥＤ３１は、青色ＬＥＤチップからの青色光と黄色系蛍光体からの黄色光〜橙色光とを互いに混色させることで白色光を出射する。   The light source unit 3 includes a plurality of LEDs 31 and a wiring board 32 on which the LEDs 31 are mounted so that the optical axis of each LED 31 faces the light irradiation surface 2A. Each LED 31 is arranged in an annular shape at equal intervals from the outer periphery of the opening 7 of the frame body 7 and along the outer periphery of the lamp 2 when the lamp 2 is viewed from the light irradiation surface 2A side. . Each LED 31 includes a blue LED chip (not shown) that emits blue light having a main wavelength of 460 nm (see also FIG. 5), and a yellow phosphor that emits yellow light to orange light having a main wavelength of 575 to 620 nm when excited by the blue light. (Not shown). Each LED 31 emits white light by mixing blue light from a blue LED chip and yellow light to orange light from a yellow phosphor.

面状導光体４は、その周縁部がＬＥＤ３１直下まで広がる略円板形状とされる。面状導光体４は、ＬＥＤ３１に相対して設けられＬＥＤ３１からの光が入射する光入射面４１と、光入射面４１に対向して設けられ光入射面４１より入射したＬＥＤ３１からの光を面状導光体４の内方に向かって全反射する全反射面４２と、を有する。光入射面４１は、平面状に構成されている。全反射面４２は、放物面状とされ、その曲率を調整することでＬＥＤ３１からの光を全反射するように構成されている。   The planar light guide 4 has a substantially disk shape with a peripheral edge extending to just below the LED 31. The planar light guide 4 is provided opposite to the LED 31 and receives a light incident surface 41 on which light from the LED 31 is incident, and the light from the LED 31 that is provided opposite to the light incident surface 41 and is incident from the light incident surface 41. And a total reflection surface 42 that totally reflects inward of the planar light guide 4. The light incident surface 41 is configured in a planar shape. The total reflection surface 42 has a parabolic shape, and is configured to totally reflect light from the LED 31 by adjusting the curvature thereof.

また、面状導光体４は、波長選択吸収部５と相対して設けられ波長選択吸収部５に向けて光を導出する光導出面４３を有する。光導出面４３は、面状導光体４の周縁部が厚肉で且つ面状導光体４の中心部が薄肉となるような曲面状に構成されている。   In addition, the planar light guide 4 has a light derivation surface 43 that is provided opposite to the wavelength selective absorption unit 5 and guides light toward the wavelength selective absorption unit 5. The light guide surface 43 is configured in a curved shape such that the peripheral portion of the planar light guide 4 is thick and the central portion of the planar light guide 4 is thin.

面状導光体４の光照射面２Ａ側とは反対側の面には、光を拡散する光拡散構造（不図示）を有し且つ光を反射する拡散反射シート８が貼着されている。光拡散構造は、例えば、微細プリズム加工、シルク印刷、又はレーザードット加工により形成され、面状導光体４の中心部に向かうにつれて密に設けられている。面状導光体４は、ＬＥＤ３１からの光を透過する透光性材料により構成され、例えば、アクリル樹脂、ポリカーボネート樹脂、ガラスにより構成される。   On the surface of the planar light guide 4 opposite to the light irradiation surface 2A side, a diffuse reflection sheet 8 having a light diffusion structure (not shown) for diffusing light and reflecting light is attached. . The light diffusion structure is formed by, for example, fine prism processing, silk printing, or laser dot processing, and is densely provided toward the center of the planar light guide 4. The planar light guide 4 is made of a translucent material that transmits light from the LED 31, and is made of, for example, acrylic resin, polycarbonate resin, or glass.

放熱板６は、円板形状とされ、配線基板３２のＬＥＤ実装面とは反対側の面に接合されている。放熱板６は、高い熱伝導率を持つ材料、例えば、アルミニウムにより構成される。   The heat radiating plate 6 has a disc shape and is joined to the surface of the wiring board 32 opposite to the LED mounting surface. The heat sink 6 is made of a material having high thermal conductivity, for example, aluminum.

枠体７の鍔部７１は、面状導光体４の周縁部と相対する面に光を反射する光反射面７４を有する。光反射面７４は、例えば、鍔部７１に白塗装を施すことで形成される。   The flange portion 71 of the frame body 7 has a light reflecting surface 74 that reflects light on a surface facing the peripheral edge portion of the planar light guide 4. The light reflecting surface 74 is formed, for example, by applying white coating to the collar portion 71.

波長選択吸収部５は、鍔部７１の開口７３よりも大きい円板形状とされ、開口７３を覆うように配置されている。波長選択吸収部５は、ＬＥＤ３１からの光を透過する透光性材料により構成され、所定波長に吸収ピークを有する色素５１を内含している。なお、波長選択吸収部５の光照射面２Ａ側の面にシボ加工等による光拡散処理を施してもよいし、波長選択吸収部５を構成する透光性材料に色素５１に加えて光拡散剤を添加してもよい。   The wavelength selective absorption unit 5 has a disk shape larger than the opening 73 of the flange portion 71 and is disposed so as to cover the opening 73. The wavelength selective absorption unit 5 is made of a translucent material that transmits light from the LED 31 and includes a dye 51 having an absorption peak at a predetermined wavelength. In addition, you may perform the light-diffusion process by embossing etc. to the light irradiation surface 2A side surface of the wavelength selection absorption part 5, or light diffusion in addition to the pigment | dye 51 to the translucent material which comprises the wavelength selection absorption part 5 An agent may be added.

図４に示すように、色素５１は、テトラアザポリフィリン系色素により構成され、波長６００ｎｍに吸収ピークを有する。ここで、式中、Ｒ１乃至Ｒ８は、−Ｒ−Ｏ−Ｚ基（Ｒはアルキレン基、Ｚは直鎖、分岐又は環状アルキル基、直鎖、分岐又は環状アルコキシアルキル基、置換又は未置換アリール基、置換又は未置換アラルキル基、若しくは直鎖、分岐又は環状ハロゲノアルキル基を表す）、水素原子、ハロゲン原子、シアノ基、ニトロ基、直鎖、分岐又は環状アルキル基、直鎖、分岐又は環状アルコキシ基、置換又は未置換アリール基、置換又は未置換アリールオキシ基、置換又は未置換アラルキル基、置換又は未置換アラルキルオキシ基、直鎖、分岐又は環状ハロゲノアルキル基、直鎖、分岐又は環状ハロゲノアルコキシ基、置換又は未置換アミノ基を表す。Ｒ１乃至Ｒ８の少なくとも１つは、−Ｒ−Ｏ−Ｚ基であり、互いに隣接するＲ１乃至Ｒ８は、炭素環式脂肪族環を形成していてもよい。また、Ｍは、２個の水素原子、２個の１価金属原子、２価金属原子、３価置換金属原子、４価置換金属原子又は酸化金属原子を表す。 As shown in FIG. 4, the dye 51 is composed of a tetraazaporphyrin-based dye and has an absorption peak at a wavelength of 600 nm. Here, in the formula, R 1 to R 8 are each a —R—O—Z group (wherein R is an alkylene group, Z is a linear, branched or cyclic alkyl group, a linear, branched or cyclic alkoxyalkyl group, substituted or non-substituted). A substituted aryl group, a substituted or unsubstituted aralkyl group, or a straight-chain, branched or cyclic halogenoalkyl group), hydrogen atom, halogen atom, cyano group, nitro group, straight-chain, branched or cyclic alkyl group, straight-chain or branched Or a cyclic alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aralkyloxy group, a linear, branched or cyclic halogenoalkyl group, linear, branched or Represents a cyclic halogenoalkoxy group, a substituted or unsubstituted amino group. At least one of R 1 to R 8 is a —R—O—Z group, and R 1 to R 8 adjacent to each other may form a carbocyclic aliphatic ring. M represents two hydrogen atoms, two monovalent metal atoms, a divalent metal atom, a trivalent substituted metal atom, a tetravalent substituted metal atom, or a metal oxide atom.

次に、上述した図２を再び参照して、ＬＥＤ３１から出射された光が外部に照射される過程について説明する。ＬＥＤ３１から出射された光（破線矢印で示す）は、光入射面４１から面状導光体４に入射し、全反射面４２により面状導光体４の内方に向かって全反射される。全反射面４２で全反射された光は、更に、光入射面４１及び光導出面４３で全反射されることで面状導光体４の内部を導光され、光入射面４１に達した光の一部（一点鎖線矢印で示す）は、拡散反射シート８により拡散及び反射されて光導出面４３から導出される。光導出面４３から導出された光は、波長選択吸収部５に入射し、そこで色素５１によって波長６００ｎｍ付近の黄色光〜橙色光が吸収された後、枠体７の開口７３を通って外部へ照射される。   Next, with reference to FIG. 2 described above again, a process in which light emitted from the LED 31 is irradiated to the outside will be described. Light emitted from the LED 31 (indicated by a broken arrow) enters the planar light guide 4 from the light incident surface 41 and is totally reflected by the total reflection surface 42 toward the inside of the planar light guide 4. . The light totally reflected by the total reflection surface 42 is further totally reflected by the light incident surface 41 and the light derivation surface 43, thereby being guided through the planar light guide 4 and reaching the light incident surface 41. A part (indicated by an alternate long and short dash line arrow) is diffused and reflected by the diffuse reflection sheet 8 and led out from the light lead-out surface 43. The light derived from the light deriving surface 43 is incident on the wavelength selective absorption unit 5, where yellow light to orange light having a wavelength of about 600 nm is absorbed by the dye 51, and then irradiated to the outside through the opening 73 of the frame body 7. Is done.

上記過程において、面状導光体４の周縁部が厚肉で且つ面状導光体４の中心部が薄肉に構成されているので、面状導光体４の内部を導光される光の光導出面４３への入射角は、面状導光体４の中心部に向かうにつれて小さくなる。そのため、面状導光体４の中心部に向かう程、光が光導出面４３から導出され易くなるので、灯具２の中心部が暗くなるのを防止して照射光輝度を均一にすることができる。   In the above process, since the peripheral portion of the planar light guide 4 is thick and the central portion of the planar light guide 4 is thin, the light guided inside the planar light guide 4 The incident angle of the light to the light guide surface 43 becomes smaller toward the center of the planar light guide 4. For this reason, the light is easily led out from the light lead-out surface 43 toward the center of the planar light guide 4, so that the center of the lamp 2 can be prevented from becoming dark and the luminance of the irradiated light can be made uniform. .

また、灯具２を光照射面２Ａ側から見たときに、光源部３が枠体７の開口７３よりも外周側に配置され、且つ面状導光体４の光入射面４１に対向する箇所に全反射面４２が設けられているので、ユーザからは光源部３（ＬＥＤ３１）が直接に見えない。これにより、グレアを防止することができる。   Further, when the lamp 2 is viewed from the light irradiation surface 2 </ b> A side, the light source unit 3 is disposed on the outer peripheral side of the opening 73 of the frame body 7 and faces the light incident surface 41 of the planar light guide 4. Since the total reflection surface 42 is provided, the light source unit 3 (LED 31) is not directly visible to the user. Thereby, glare can be prevented.

また、面状導光体４の周縁部から導出された光が、枠体７の光反射面７４で反射されて再び面状導光体４に入射するので、灯具２の光利用効率を向上することができる。更に、拡散反射シート８の光拡散構造が面状導光体４の中心部に向かうにつれて密に設けられているので、面状導光体４の中心部に向かう程、面状導光体４内を導光される光は、拡散構造によって拡散される機会が増して光導出面４３から導出され易くなる。これによっても、灯具２の中心部が暗くなるのを防止して照射光輝度を均一にすることができる。   Further, the light derived from the peripheral edge of the planar light guide 4 is reflected by the light reflecting surface 74 of the frame 7 and enters the planar light guide 4 again, so that the light utilization efficiency of the lamp 2 is improved. can do. Further, since the light diffusion structure of the diffuse reflection sheet 8 is densely provided toward the center of the planar light guide 4, the planar light guide 4 becomes closer to the center of the planar light guide 4. The light guided in the inside is more likely to be diffused by the diffusing structure and is easily led out from the light lead-out surface 43. This also makes it possible to prevent the central portion of the lamp 2 from becoming dark and make the illumination light luminance uniform.

図５に示すように、上記のようにして灯具２から照射される光（実線で示す）は、波長選択吸収部５が設けられていない灯具から照射される光（一点鎖線で示す）に比べて、黄色光〜橙色光が低減された光となる。このような光は、視対象物を目立たせる作用を有し、例えば、白色の紙面上に書かれた文字をくっきりと見せることができる。   As shown in FIG. 5, the light emitted from the lamp 2 (shown by a solid line) as described above is compared with the light (shown by an alternate long and short dash line) emitted from a lamp not provided with the wavelength selective absorption unit 5. Thus, yellow light to orange light is reduced. Such light has the effect of conspicuous the object to be viewed, and for example, can clearly show characters written on white paper.

上述のように、本実施形態の照明装置１によれば、光源部３からの光が、面状導光体４の内部を導光されてから波長選択吸収部５に入射する。そのため、光源部からの光が直接に波長選択吸収部に入射する場合に比べて、色素５１が光源部３からの高輝度光や熱に曝され難くなり、また、波長選択吸収部５における光路長が均一になる。従って、照射光の輝度むら及び色むらの発生を低減することができ、また、光源部３の近傍に位置する色素５１の変性を防止することができる。   As described above, according to the illumination device 1 of the present embodiment, the light from the light source unit 3 enters the wavelength selective absorption unit 5 after being guided through the planar light guide 4. Therefore, compared with the case where the light from the light source unit is directly incident on the wavelength selective absorption unit, the dye 51 is not easily exposed to high-intensity light or heat from the light source unit 3, and the optical path in the wavelength selective absorption unit 5 The length becomes uniform. Therefore, it is possible to reduce the occurrence of uneven brightness and color unevenness of the irradiation light, and to prevent the dye 51 located near the light source unit 3 from being denatured.

なお、本発明に係る照明装置は、上記実施形態に限定されず、種々の変形が可能である。例えば、面状導光体の形状は、上記のものに限定されず、光入射面と光導出面とが互いに平行となった平板形状とされてもよい。また、色素は、テトラアザポリフィリン系色素に限定されず、照射光の光学特性に応じて任意の色素を用いることができる。更に、波長選択吸収部を交換可能として、照明装置の使用環境に応じて異なる色素を含む波長選択吸収部を適宜使用することができる構成としてもよい。   Note that the lighting device according to the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the shape of the planar light guide is not limited to the above, and may be a flat plate shape in which the light incident surface and the light output surface are parallel to each other. Moreover, a pigment | dye is not limited to a tetraaza porphyrin type pigment | dye, Arbitrary pigment | dyes can be used according to the optical characteristic of irradiation light. Furthermore, it is good also as a structure which can replace | exchange wavelength selective absorption part and can use suitably the wavelength selective absorption part containing a pigment | dye which changes according to the use environment of an illuminating device.

１ 照明装置
２ 灯具
２Ａ 灯具の光照射面
３ 光源部
４ 面状導光体
４１ 光入射面
４２ 全反射面
５ 波長選択吸収部
５１ 色素
７ 枠体
７３ 開口
７４ 光反射面 DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Lamp 2A Light irradiation surface 3 of a lamp Light source part 4 Planar light guide 41 Light incident surface 42 Total reflection surface 5 Wavelength selection absorption part 51 Dye 7 Frame 73 Opening 74 Light reflection surface

Claims (5)

光源部と、この光源部から出射された光のうち所定波長域の光を選択的に吸収する波長選択吸収部と、を有する灯具を備えた照明装置であって、
前記灯具は、平板形状とされ、
前記波長選択吸収部は、前記灯具の光照射面に配置され、
前記光源部は、前記灯具の外周に沿って配置され、
前記光源部から出射された光を前記灯具の内方に向かって導光しつつ前記波長選択吸収部に向けて導出する面状導光体を更に備えたことを特徴とする照明装置。 A lighting device including a lamp having a light source unit and a wavelength selective absorption unit that selectively absorbs light in a predetermined wavelength region of light emitted from the light source unit,
The lamp is a flat plate shape,
The wavelength selective absorption unit is disposed on a light irradiation surface of the lamp,
The light source unit is disposed along the outer periphery of the lamp,
An illumination device, further comprising: a planar light guide that guides light emitted from the light source unit toward the inside of the lamp and guides the light toward the wavelength selective absorption unit. 前記面状導光体は、その中心部が薄肉で且つ前記光源部と相対する周縁部が厚肉となるように形成されていることを特徴とする請求項１に記載の照明装置。   2. The lighting device according to claim 1, wherein the planar light guide is formed such that a central portion thereof is thin and a peripheral portion facing the light source portion is thick. 前記光源部、波長選択吸収部及び面状導光体を収容し、且つ前記波長選択吸収部からの光を外部に出射させるための開口を有する枠体を更に備え、
前記光源は、前記灯具を前記光照射面側から見たときに、前記開口よりも外周側に配置され、
前記面状導光体は、前記光源からの光が入射する光入射面に対向する箇所に前記光入射面より入射した光を前記面状導光体の内方に向かって全反射する全反射面を有することを特徴とする請求項１又は請求項２に記載の照明装置。 A frame that houses the light source unit, the wavelength selective absorption unit, and the planar light guide, and further includes an opening for emitting light from the wavelength selective absorption unit to the outside;
The light source is arranged on the outer peripheral side of the opening when the lamp is viewed from the light irradiation surface side,
The planar light guide is totally reflected to totally reflect the light incident from the light incident surface toward the inside of the planar light guide at a position facing the light incident surface on which light from the light source is incident. The lighting device according to claim 1, further comprising a surface. 前記枠体は、前記面状導光体の周縁部に相対する面に光反射面を有することを特徴とする請求項３に記載の照明装置。   The lighting device according to claim 3, wherein the frame has a light reflecting surface on a surface facing a peripheral edge of the planar light guide. 前記波長選択吸収部は、波長６００ｎｍに吸収ピークを有するテトラアザポリフィリン系色素を含むことを特徴とする請求項１乃至請求項４のいずれか一項に記載の照明装置。   The illumination device according to any one of claims 1 to 4, wherein the wavelength selective absorption unit includes a tetraazaporphyrin-based dye having an absorption peak at a wavelength of 600 nm.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016149269A (en) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 Lighting device
JP2016149267A (en) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 Lighting device
JP2016170355A (en) * 2015-03-13 2016-09-23 パナソニックＩｐマネジメント株式会社 Wavelength control filter, and light emitting device and illumination device having the same
JP2018088347A (en) * 2016-11-29 2018-06-07 パナソニックＩｐマネジメント株式会社 Light guide plate and lighting device using the same
USD985828S1 (en) * 2021-03-23 2023-05-09 MerchSource, LLC Desk lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004323481A (en) * 2003-04-28 2004-11-18 Mitsubishi Chemicals Corp Tetraazaporphyrin compound, tetraazaporphyrin pigment and optical filter using the same
JP2009016081A (en) * 2007-07-02 2009-01-22 Daishi Densetsu Kk Surface light emitting device
JP2009199971A (en) * 2008-02-25 2009-09-03 Nippon Seiki Co Ltd Lighting device
JP2010026571A (en) * 2008-07-15 2010-02-04 Oki Semiconductor Co Ltd Image processor and image processing method
WO2012075334A1 (en) * 2010-12-02 2012-06-07 Intematix Corporation Solid-state lamps with light guide and photoluminescence material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4895158B2 (en) * 2005-08-26 2012-03-14 国立大学法人東北大学 LCD display
JP2010267571A (en) * 2009-05-18 2010-11-25 Toshiba Lighting & Technology Corp Lighting device
CN201504374U (en) * 2009-08-07 2010-06-09 珠海格力电器股份有限公司 Household appliance panel and light guide device used by same
US20120281166A1 (en) * 2010-01-13 2012-11-08 Fujifilm Corporation Light guide plate, surface illuminating device, and liquid crystal display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004323481A (en) * 2003-04-28 2004-11-18 Mitsubishi Chemicals Corp Tetraazaporphyrin compound, tetraazaporphyrin pigment and optical filter using the same
JP2009016081A (en) * 2007-07-02 2009-01-22 Daishi Densetsu Kk Surface light emitting device
JP2009199971A (en) * 2008-02-25 2009-09-03 Nippon Seiki Co Ltd Lighting device
JP2010026571A (en) * 2008-07-15 2010-02-04 Oki Semiconductor Co Ltd Image processor and image processing method
WO2012075334A1 (en) * 2010-12-02 2012-06-07 Intematix Corporation Solid-state lamps with light guide and photoluminescence material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016149269A (en) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 Lighting device
JP2016149267A (en) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 Lighting device
JP2016170355A (en) * 2015-03-13 2016-09-23 パナソニックＩｐマネジメント株式会社 Wavelength control filter, and light emitting device and illumination device having the same
JP2018088347A (en) * 2016-11-29 2018-06-07 パナソニックＩｐマネジメント株式会社 Light guide plate and lighting device using the same
USD985828S1 (en) * 2021-03-23 2023-05-09 MerchSource, LLC Desk lamp

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