JP2007080533A - Light-emitting diode lighting fixture - Google Patents

Light-emitting diode lighting fixture Download PDF

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JP2007080533A
JP2007080533A JP2005262948A JP2005262948A JP2007080533A JP 2007080533 A JP2007080533 A JP 2007080533A JP 2005262948 A JP2005262948 A JP 2005262948A JP 2005262948 A JP2005262948 A JP 2005262948A JP 2007080533 A JP2007080533 A JP 2007080533A
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light
led
concave mirror
red
green
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JP4487888B2 (en
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Takuya Nakatani
卓也 中谷
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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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
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like 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]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Device Packages (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting fixture with shadow prevented from appearing on a lit face. <P>SOLUTION: The LED lighting fixture A is provided with a fixture body 10 with an opening fitted at an underside, a concave mirror 14 of a dome shape with a center part recessed as compared with a periphery part and housed in the fixture body 10 with the center part upward, and red-color LEDs 2R, green-color LEDs 2G and blue-color LEDs 2B arranged along the periphery part of the concave mirror 14, respectively, with light-emitting faces directed toward the center part side. Irradiation light from each color of LEDs 2R, LEDs 2G, LEDs 2B is reflected by the concave mirror 14 to generate white light by mixing lights of red, green, and blue colors, and is irradiated on a lit face through the opening of the fixture body 10. An RGB sensor 3 is arranged at the center part of the concave mirror 14 for individually measuring light intensity of each color component of red, green, and blue colors, and light outputs of each LED 2R, 2G, 2B are controlled so that a color balance of red, green, and blue colors is to be at a set value on the basis of a detection result of the RGB sensor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ＬＥＤ照明器具に関するものである。   The present invention relates to an LED lighting apparatus.

この種のＬＥＤ照明器具としては、赤色ＬＥＤと緑色ＬＥＤと青色ＬＥＤとを備え、各ＬＥＤの発光色を混色することによって白色光を発生させて、被照面に照射させるものが従来より提供されている。   As this kind of LED lighting fixture, what is provided with red LED, green LED, and blue LED, generates white light by mixing the luminescent color of each LED, and irradiates an illuminated surface conventionally is provided. Yes.

図３は従来のＬＥＤ照明器具の一例を示しており、このＬＥＤ照明器具は、開口部を下向きにして、天井材２０に設けた埋込孔２１に埋込配設される器体１０を備えている。器体１０の内部には、赤色ＬＥＤ２Ｒと緑色ＬＥＤ２Ｇと青色ＬＥＤ２Ｂとがそれぞれ発光面を器体１０の開口部側にして配置されており、器体１０の開口部に配置した拡散板１５により各ＬＥＤ２Ｒ，２Ｇ，２Ｂの発光色を拡散させることで、各色の光を混色して白色光を発生させている。   FIG. 3 shows an example of a conventional LED lighting fixture, and the LED lighting fixture includes a container body 10 that is embedded in an embedded hole 21 provided in the ceiling member 20 with an opening facing downward. ing. Inside the vessel 10, red LEDs 2R, green LEDs 2G, and blue LEDs 2B are respectively arranged with the light emitting surfaces facing the openings of the vessel 10, and each diffuser plate 15 arranged in the opening of the vessel 10 is used for each. By diffusing the emission colors of the LEDs 2R, 2G, and 2B, the light of each color is mixed to generate white light.

ここで、各色のＬＥＤ２Ｒ，２Ｇ，２Ｂの光出力は使用温度や累積使用時間に応じて変化し、それによって混色された光の光色が変化するので、各ＬＥＤ２Ｒ，２Ｇ，２Ｂの光が集まる拡散板１５の中央部にＲＧＢセンサ３を配置し、ＲＧＢセンサ３によってＲＧＢの各色成分の光強度を個別に検出している。そして、図示しない制御部が、ＲＧＢセンサ３の検出結果をもとに各ＬＥＤ２Ｒ，２Ｇ，２Ｂの光出力を制御することで、発光色の色温度を所定の色温度に制御している。   Here, the light outputs of the LEDs 2R, 2G, and 2B of the respective colors change according to the use temperature and the accumulated use time, and the light color of the mixed light changes accordingly, so that the lights of the respective LEDs 2R, 2G, and 2B gather. The RGB sensor 3 is arranged at the center of the diffusion plate 15 and the RGB sensor 3 individually detects the light intensity of each color component of RGB. And the control part which is not illustrated controls the light temperature of each LED2R, 2G, 2B based on the detection result of RGB sensor 3, and controls the color temperature of emitted light color to predetermined color temperature.

また、特許文献１に示されるＬＥＤ照明器具では、拡散板１５の中央部にＲＧＢセンサ３を配置する代わりに、拡散板１５の内側にＲＧＢのＬＥＤの配列方向に沿って光ファイバを延設し、この光ファイバで各ＬＥＤの発光をＲＧＢセンサに導光しており、ＲＧＢセンサの検出結果をもとに各色のＬＥＤの光出力を制御していた。
特表２００２−５３３８７０号公報（段落［００１３］−［００１５］） Further, in the LED lighting apparatus disclosed in Patent Document 1, instead of arranging the RGB sensor 3 at the center of the diffusion plate 15, an optical fiber is extended inside the diffusion plate 15 along the arrangement direction of the RGB LEDs. The light emitted from each LED is guided to the RGB sensor using this optical fiber, and the light output of each color LED is controlled based on the detection result of the RGB sensor.
JP-T-2002-533870 (paragraphs [0013]-[0015])

上述のＬＥＤ照明器具では、各色のＬＥＤ２Ｒ，２Ｇ，２Ｂの光を拡散することによって、光を混色させる拡散板１５にＲＧＢセンサ３を取り付けたり、拡散板１５の内側に各ＬＥＤの発光をＲＧＢセンサに導光する光ファイバを配設しているので、ＲＧＢセンサ３や光ファイバによって照射光の一部が遮られて、被照面に影ができるという問題があった。   In the LED lighting apparatus described above, the RGB sensor 3 is attached to the diffusion plate 15 that mixes the light by diffusing the light of the LEDs 2R, 2G, and 2B of each color, or the light emission of each LED is disposed inside the diffusion plate 15 by the RGB sensor. Since the optical fiber that guides light is disposed, a part of the irradiation light is blocked by the RGB sensor 3 and the optical fiber, and there is a problem that a shadow is formed on the illuminated surface.

本発明は上記問題点に鑑みて為されたものであり、その目的とするところは、被照面に影ができるのを防止したＬＥＤ照明器具を提供することにある。   This invention is made | formed in view of the said problem, The place made into the objective is to provide the LED lighting fixture which prevented the shadow on the to-be-illuminated surface.

上記目的を達成するために、本発明は、周部に比べて中央部が凹んだ凹面鏡と、当該凹面鏡の周部に沿って、発光面を凹面鏡の中央部側にしてそれぞれ配置された赤色ＬＥＤ、緑色ＬＥＤおよび青色ＬＥＤを備え、各ＬＥＤからの照射光を凹面鏡で反射することによって混色した光を被照面に照射するＬＥＤ照明器具において、凹面鏡の中央部に配置されて、赤色、緑色、青色の各色成分の光強度を個別に測定するＲＧＢセンサと、ＲＧＢセンサの検出結果をもとに赤色、緑色、青色の色バランスが所定の設定値となるように各ＬＥＤの光出力を制御する制御部とを設けたことを特徴とする。   In order to achieve the above object, the present invention provides a concave mirror having a recessed central portion compared to the peripheral portion, and a red LED disposed along the peripheral portion of the concave mirror with the light emitting surface positioned on the central portion side of the concave mirror. In the LED lighting apparatus that includes a green LED and a blue LED, and irradiates light to the illuminated surface by reflecting the light emitted from each LED with the concave mirror, the red, green, and blue are arranged at the center of the concave mirror. RGB sensor that individually measures the light intensity of each color component, and control that controls the light output of each LED so that the color balance of red, green, and blue becomes a predetermined set value based on the detection result of the RGB sensor And a portion.

この発明によれば、赤色ＬＥＤと緑色ＬＥＤと青色ＬＥＤとを凹面鏡の周部に沿ってそれぞれ配置するとともに、赤色、緑色、青色の各色成分の光強度を個別に測定するＲＧＢセンサを凹面鏡の中央部に配置し、各ＬＥＤからの光を凹面鏡で反射することによって、混色された光が被照面に照射されるので、ＲＧＢセンサによって被照面に照射される光の一部が遮られることはなく、被照面に影ができるのを防止できる。そのうえＲＧＢセンサは、各ＬＥＤからの光が最も良く集光される凹面鏡の中央部に配置されているので、各色成分の光強度を正確に検出することができ、ＲＧＢセンサの検出結果をもとに制御部が各ＬＥＤの光出力を制御することで、所望の色温度の照射光を得ることができる。   According to the present invention, the red LED, the green LED, and the blue LED are respectively arranged along the peripheral portion of the concave mirror, and the RGB sensor that individually measures the light intensity of each color component of red, green, and blue is provided at the center of the concave mirror. Since the mixed color light is irradiated onto the illuminated surface by reflecting the light from each LED with a concave mirror, a part of the light illuminated on the illuminated surface is not blocked by the RGB sensor. It is possible to prevent a shadow from being formed on the illuminated surface. In addition, since the RGB sensor is arranged at the center of the concave mirror where the light from each LED is best collected, the light intensity of each color component can be accurately detected, and the detection result of the RGB sensor is used. In addition, the control unit controls the light output of each LED, so that irradiation light having a desired color temperature can be obtained.

本発明によれば、赤色ＬＥＤと緑色ＬＥＤと青色ＬＥＤとを凹面鏡の周部に沿ってそれぞれ配置するとともに、赤色、緑色、青色の各色成分の光強度を個別に測定するＲＧＢセンサを凹面鏡の中央部に配置し、各ＬＥＤからの光を凹面鏡で反射することによって、混色された光が被照面に照射されるので、ＲＧＢセンサによって被照面に照射される光の一部が遮られることはなく、被照面に影ができるのを防止できるという効果がある。そのうえＲＧＢセンサは、各ＬＥＤからの光が最も良く集光される凹面鏡の中央部に配置されているので、各色成分の光強度を正確に検出することができ、ＲＧＢセンサの検出結果をもとに制御部が各ＬＥＤの光出力を制御することで、所望の色温度の照射光を得ることができるという効果もある。   According to the present invention, a red LED, a green LED, and a blue LED are respectively arranged along the periphery of the concave mirror, and an RGB sensor that individually measures the light intensity of each color component of red, green, and blue is provided at the center of the concave mirror. Since the mixed color light is irradiated onto the illuminated surface by reflecting the light from each LED with a concave mirror, a part of the light illuminated on the illuminated surface is not blocked by the RGB sensor. There is an effect that it is possible to prevent a shadow from being formed on the illuminated surface. In addition, since the RGB sensor is arranged at the center of the concave mirror where the light from each LED is best collected, the light intensity of each color component can be accurately detected, and the detection result of the RGB sensor is used. In addition, the control unit controls the light output of each LED, so that it is possible to obtain irradiation light having a desired color temperature.

以下では、本発明に係るＬＥＤ照明器具を所謂ダウンライトに適用した一実施形態について図１及び図２に基づいて説明する。   Below, one Embodiment which applied the LED lighting fixture which concerns on this invention to what is called a downlight is described based on FIG.1 and FIG.2.

図１（ａ）にＬＥＤ照明器具Ａの施工状態を示す断面図を、図１（ｂ）にＢ−Ｂ’断面図を、図２にＬＥＤ照明器具Ａのブロック図をそれぞれ示す。   FIG. 1A is a sectional view showing a construction state of the LED lighting apparatus A, FIG. 1B is a B-B ′ sectional view, and FIG. 2 is a block diagram of the LED lighting apparatus A.

このＬＥＤ照明器具Ａの器体１０は、一端側が閉塞された円筒状であって、他端側の開口部を下向きにして、天井材２０に設けた埋込孔２１に埋込配設される筒部１１と、筒部１１の開口部に嵌合される扁平なドーナツ形のキャップ部１２とで構成され、キャップ部１２の下部周縁からは外側に向かって鍔部１３が突設されている。この器体１０は、天井材２０に設けた埋込孔２１の内部に上部を挿入し、鍔部１３の上面を天井材２０の下面に当接させた状態で適宜の手段を用いて天井材２０に固定される。   The container 10 of the LED lighting apparatus A has a cylindrical shape with one end closed, and is embedded in an embedded hole 21 provided in the ceiling material 20 with the opening on the other end facing downward. It is comprised by the cylinder part 11 and the flat donut-shaped cap part 12 fitted by the opening part of the cylinder part 11, and the collar part 13 protrudes from the lower periphery of the cap part 12 toward the outer side. . The container body 10 is inserted into an embedded hole 21 provided in the ceiling material 20, and the ceiling material is used with appropriate means in a state where the upper surface of the flange portion 13 is in contact with the lower surface of the ceiling material 20. 20 is fixed.

器体１０の内部には、表面に鏡面加工が施されたドーム状の凹面鏡１４が収納されている。凹面鏡１４は周部に比べて中央部が凹んでおり、周部をキャップ部１２の上面に載置した状態で器体１０内に収納されている。またキャップ部１２の上面には、凹面鏡１４よりも内側に赤色ＬＥＤ２Ｒと緑色ＬＥＤ２Ｇと青色ＬＥＤ２Ｂとが、発光面を凹面鏡１４の中央部側に向けた状態で、凹面鏡１４の周部に沿って複数個ずつ配置されている。而して、各色のＬＥＤ２Ｒ，２Ｇ，２Ｂからの照射光は凹面鏡１４で反射されることによって混色されて、白色光を発生し、キャップ部１２の窓孔１２ａを通して被照面に照射される。なお、各色のＬＥＤ２Ｒ，２Ｇ，２Ｂは、凹面鏡１４の周部に沿って、所定の順番（例えば赤色ＬＥＤ２Ｒ→緑色ＬＥＤ２Ｇ→青色ＬＥＤ２Ｂ→赤色ＬＥＤ２Ｒ…）でサイクリックに配置されているので、各色のＬＥＤ２Ｒ，２Ｇ，２Ｂが均等に配置されて、光が混色しやすくなっている。   Inside the vessel 10 is housed a dome-shaped concave mirror 14 whose surface is mirror-finished. The concave mirror 14 is recessed in the center compared to the peripheral portion, and is stored in the body 10 with the peripheral portion being placed on the upper surface of the cap portion 12. A plurality of red LEDs 2R, green LEDs 2G, and blue LEDs 2B are arranged on the upper surface of the cap portion 12 along the peripheral portion of the concave mirror 14 with the light emitting surface facing the central portion of the concave mirror 14 on the inner side of the concave mirror 14. It is arranged one by one. Thus, the light emitted from the LEDs 2R, 2G, and 2B of the respective colors is mixed by being reflected by the concave mirror 14 to generate white light, which is irradiated onto the illuminated surface through the window hole 12a of the cap portion 12. The LEDs 2R, 2G, 2B of the respective colors are cyclically arranged in a predetermined order (for example, red LED 2R → green LED 2G → blue LED 2B → red LED 2R...) Along the peripheral portion of the concave mirror 14, so The LEDs 2R, 2G, and 2B are evenly arranged so that light is easily mixed.

ここで、凹面鏡１４の中央部にはＲＧＢセンサ３が受光面を下側にして取着されている。ＲＧＢセンサ３は赤色、緑色、青色の各色成分の光強度を個別に測定するものであり、制御部１では、ＲＧＢセンサ３の検出結果をもとに、赤色、緑色、青色の色バランスが所定の設定値となるように各ＬＥＤ２Ｒ，２Ｇ，２Ｂの光出力を制御している。   Here, the RGB sensor 3 is attached to the central portion of the concave mirror 14 with the light receiving surface facing downward. The RGB sensor 3 individually measures the light intensity of each color component of red, green, and blue, and the control unit 1 determines the color balance of red, green, and blue based on the detection result of the RGB sensor 3. The light output of each LED 2R, 2G, 2B is controlled so that the set value becomes.

以上説明したように、本実施形態のＬＥＤ照明器具Ａでは、赤色ＬＥＤ２Ｒと緑色ＬＥＤ２Ｇと青色ＬＥＤ２Ｂとを凹面鏡１４の周部に沿ってそれぞれ配置するとともに、赤色、緑色、青色の各色成分の光強度を個別に測定するＲＧＢセンサ３を凹面鏡１４の中央部に配置し、各ＬＥＤ２Ｒ，２Ｇ，２Ｂからの光を凹面鏡１４で反射することによって、混色された白色光が被照面に照射されるので、ＲＧＢセンサ３によって被照面に照射される光の一部が遮られることはなく、被照面に影ができるのを防止できる。そのうえＲＧＢセンサ３は、各ＬＥＤ２Ｒ，２Ｇ，２Ｂからの光が最も良く集光される凹面鏡１４の中央部に配置されているので、各色成分の光強度を正確に検出することができ、ＲＧＢセンサ３の検出結果をもとに制御部１が各ＬＥＤ２Ｒ，２Ｇ，２Ｂの光出力を制御することで、所定の色温度の白色光を得ることができる。   As described above, in the LED lighting apparatus A of the present embodiment, the red LED 2R, the green LED 2G, and the blue LED 2B are arranged along the peripheral portion of the concave mirror 14, and the light intensity of each color component of red, green, and blue Since the RGB sensor 3 for individually measuring the color is disposed in the center of the concave mirror 14 and the light from each LED 2R, 2G, 2B is reflected by the concave mirror 14, the mixed color white light is irradiated onto the illuminated surface. The RGB sensor 3 does not block a part of the light irradiated on the illuminated surface, and can prevent the illuminated surface from being shaded. In addition, since the RGB sensor 3 is arranged at the center of the concave mirror 14 where the light from each of the LEDs 2R, 2G, and 2B is best collected, it is possible to accurately detect the light intensity of each color component. The control unit 1 controls the light output of each of the LEDs 2R, 2G, and 2B based on the detection result 3 so that white light having a predetermined color temperature can be obtained.

なお本実施形態では赤色ＬＥＤ２Ｒと緑色ＬＥＤ２Ｇと青色ＬＥＤ２Ｂの光を混色して白色光を発生させているが、被照面に照射する光の光色を白色光に限定する趣旨のものではなく、ＲＧＢの色バランスが所定の設定値となるように各色のＬＥＤ２Ｒ，２Ｇ，２Ｂを制御すれば、所望の色温度（光色）の光を被照面に照射させることができる。   In the present embodiment, the light emitted from the red LED 2R, the green LED 2G, and the blue LED 2B is mixed to generate white light. However, the light color of the light applied to the illuminated surface is not limited to white light. By controlling the LEDs 2R, 2G, and 2B of the respective colors so that the color balance becomes a predetermined set value, it is possible to irradiate the illuminated surface with light of a desired color temperature (light color).

また本実施形態ではＬＥＤ照明器具をダウンライトに適用した例に基づいて説明を行ったが、本発明に係るＬＥＤ照明器具をダウンライト以外の照明器具に適用しても良いことは言うまでもない。   Moreover, although this embodiment demonstrated based on the example which applied the LED lighting fixture to the downlight, it cannot be overemphasized that the LED lighting fixture which concerns on this invention may be applied to lighting fixtures other than a downlight.

本実施形態のＬＥＤ照明器具の施工状態を示す断面図である。It is sectional drawing which shows the construction state of the LED lighting fixture of this embodiment. 同上のブロック図である。It is a block diagram same as the above. 従来のＬＥＤ照明器具の施工状態を示す断面図である。It is sectional drawing which shows the construction state of the conventional LED lighting fixture.

符号の説明Explanation of symbols

Ａ ＬＥＤ照明器具
２Ｒ 赤色ＬＥＤ
２Ｇ 緑色ＬＥＤ
２Ｂ 青色ＬＥＤ
３ ＲＧＢセンサ
１０ 器体
１４ 凹面鏡 A LED lighting fixture 2R Red LED
2G green LED
2B Blue LED
3 RGB sensor 10 Body 14 Concave mirror

Claims (1)

周部に比べて中央部が凹んだ凹面鏡と、当該凹面鏡の周部に沿って、発光面を凹面鏡の中央部側にしてそれぞれ配置された赤色ＬＥＤ、緑色ＬＥＤおよび青色ＬＥＤを備え、前記各ＬＥＤからの照射光を凹面鏡で反射することによって混色した光を被照面に照射するＬＥＤ照明器具において、前記凹面鏡の中央部に配置されて、赤色、緑色、青色の各色成分の光強度を個別に測定するＲＧＢセンサと、ＲＧＢセンサの検出結果をもとに赤色、緑色、青色の色バランスが所定の設定値となるように前記各ＬＥＤの光出力を制御する制御部とを設けたことを特徴とするＬＥＤ照明器具。
A concave mirror having a concave center part compared to the peripheral part, and a red LED, a green LED and a blue LED arranged respectively with the light emitting surface at the central part side of the concave mirror along the peripheral part of the concave mirror. In the LED lighting fixture that irradiates the illuminated surface with light mixed by reflecting the light emitted from the concave mirror, the light intensity of each color component of red, green, and blue is individually measured at the center of the concave mirror And a control unit for controlling the light output of each LED so that the color balance of red, green, and blue becomes a predetermined set value based on the detection result of the RGB sensor. LED lighting equipment.
JP2005262948A 2005-09-09 2005-09-09 LED lighting equipment Expired - Fee Related JP4487888B2 (en)

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