JP2010176985A - Lighting system - Google Patents

Lighting system Download PDF

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JP2010176985A
JP2010176985A JP2009017108A JP2009017108A JP2010176985A JP 2010176985 A JP2010176985 A JP 2010176985A JP 2009017108 A JP2009017108 A JP 2009017108A JP 2009017108 A JP2009017108 A JP 2009017108A JP 2010176985 A JP2010176985 A JP 2010176985A
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Prior art keywords
light
color temperature
unit
light emitting
illumination
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Inventor
Minoru Maehara
稔 前原
Kazuyoshi Kadotani
和佳 門谷
Kenichiro Tanaka
健一郎 田中
Ichiro Tanimura
一郎 谷村
Takuya Shinoda
卓哉 信田
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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Priority to JP2009017108A priority Critical patent/JP2010176985A/en
Priority to EP10000707.9A priority patent/EP2219418B1/en
Priority to CN201010105463.6A priority patent/CN101839435B/en
Priority to US12/696,002 priority patent/US8330378B2/en
Publication of JP2010176985A publication Critical patent/JP2010176985A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/24—Controlling the colour of the light using electrical feedback from LEDs or from LED modules
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/28—Controlling the colour of the light using temperature feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the light color and the illuminance of an illuminating light with characteristics similar to those of an incandescent lamp even when using a light emitting diode as a light source. <P>SOLUTION: According to operation input accepting means (an operation unit 11 of the controller 1, avarialr resistoor, and an A/D converter generation unit of a controller 1, and control signal input unit 20 and drive signal converting unit 23 of a power source unit 2) determines the quantity of light of each of light emitting diodes 3R, 3G, 3B of an illuminating light source 3 such that the color temperature and the quantity of light of the illuminating light linkingly increase/decrease in a range not more than the color temperature (about 2,800 K) in rated lighting of the illuminating light source 3, the chromaticity the illuminating light changes almost along a black-body locus and the change in color temperature when the quantity of light is relatively little is greater than that when the quantity of light is relatively much. Thus, the light color and the illuminance of the illuminating light can be adjusted with characteristics similar to those of the incandescent lamp. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、照明光の光色を可変とした照明装置に関するものである。   The present invention relates to an illumination device in which the light color of illumination light is variable.

従来の照明装置として、例えば特許文献１には、赤色発光ダイオード、緑色発光ダイオード、青色発光ダイオードを有する照明ユニットと、照明ユニットの各色の発光ダイオードを駆動し且つその光量（照度）を調整するコントロールユニットとを備え、コントロールユニットに各色毎に設けられている操作部を各々操作することで各色（赤，緑，青）の光量を各別に調整して照明光（混色光）の光色（色温度）を可変とした照明装置が記載されている。   As a conventional lighting device, for example, Patent Document 1 discloses a lighting unit having a red light emitting diode, a green light emitting diode, and a blue light emitting diode, and a control for driving a light emitting diode of each color of the lighting unit and adjusting the light amount (illuminance). Unit, and adjust the light quantity of each color (red, green, blue) separately by operating the operation part provided for each color in the control unit, and the light color (color) of the illumination light (mixed color light) A lighting device with variable temperature is described.

特開２００８−２９３９４６号公報JP 2008-293946 A

ところで、発光ダイオードを光源とする照明装置（照明器具）は、白熱ランプを光源とする照明装置（照明器具）の代替として使用される場合が多い。ここで、白熱ランプは定格点灯時を１００％として調光比（光量）を低下させたとき、図２（ａ），（ｂ）に示すように光量の低下とともに照明光の色度が黒体軌跡に沿って変化するように色温度も低下する特性を有している。一方、発光ダイオードを調光した場合、光の波長は変化せずに光量のみが変化する特性を有している。   By the way, a lighting device (lighting fixture) using a light emitting diode as a light source is often used as an alternative to a lighting device (lighting fixture) using an incandescent lamp as a light source. Here, when the incandescent lamp reduces the dimming ratio (light quantity) with the rated lighting at 100%, as shown in FIGS. 2A and 2B, the chromaticity of the illumination light becomes black body as the light quantity decreases. The color temperature is also lowered so as to change along the locus. On the other hand, when the light emitting diode is dimmed, the light wavelength does not change and only the light quantity changes.

しかしながら、特許文献１に記載されている従来例では、使用者自らがコントロールユニットの３つの操作部を操作して赤色、緑色、青色の発光ダイオードの光量を各別に調整することで混色光の色温度を設定しなければならず、白熱ランプの光量−色温度特性に近い特性で照明光の光量並びに色温度を変化させることは非常に困難である。   However, in the conventional example described in Patent Document 1, the user himself / herself operates the three operation units of the control unit to adjust the light amounts of the red, green, and blue light-emitting diodes, respectively, thereby changing the color of the mixed color light. The temperature must be set, and it is very difficult to change the light quantity and color temperature of the illumination light with characteristics close to the light quantity-color temperature characteristic of the incandescent lamp.

本発明は上記事情に鑑みて為されたものであり、その目的は、発光ダイオードを光源とする場合においても白熱ランプに近い特性で照明光の光色及び照度を調整することができる照明装置を提供することにある。   The present invention has been made in view of the above circumstances, and an object thereof is to provide an illumination device capable of adjusting the light color and illuminance of illumination light with characteristics close to those of an incandescent lamp even when a light emitting diode is used as a light source. It is to provide.

本発明は、上記目的を達成するために、光色が異なる複数の発光ダイオードを有する照明光源と、これら複数の発光ダイオードを個別且つ任意の光量で発光させる駆動手段と、人による操作入力を受け付ける操作入力受付手段と、照明光源から照射される照明光の色温度並びに光量が操作入力受付手段で受け付ける操作入力に応じた色温度並びに光量となるように照明光源の各発光ダイオードの光量を決定する決定手段とを備え、駆動手段は、それぞれの発光ダイオードを決定手段が決定した光量で発光させ、決定手段は、照明光源の定格点灯時の色温度以下の範囲において、操作入力の変化に対応して照明光の色温度並びに光量が連動して増減し且つ照明光の色度が黒体軌跡にほぼ沿って変化するとともに光量が相対的に大きいときの色温度の変化に対して光量が相対的に小さいときの色温度の変化が大きくなるように照明光源の各発光ダイオードの光量を決定することを特徴とする。   In order to achieve the above object, the present invention accepts an illumination light source having a plurality of light emitting diodes having different light colors, a driving means for causing each of the plurality of light emitting diodes to emit light individually and in an arbitrary amount of light, and a human operation input. The light amount of each light emitting diode of the illumination light source is determined so that the color temperature and the light amount of the illumination light emitted from the operation input receiving unit and the illumination light source become the color temperature and the light amount according to the operation input received by the operation input receiving unit. Determining means, and the driving means causes each light emitting diode to emit light with the amount of light determined by the determining means, and the determining means responds to a change in operation input in a range below the color temperature when the illumination light source is rated lighting. The color temperature when the color temperature and the amount of light of the illumination light increase or decrease in conjunction with each other, and the chromaticity of the illumination light changes almost along the black body locus and the amount of light is relatively large. A change in color temperature when the light amount is relatively small and determines the amount of light emitted from each light emitting diode illumination source so as to increase to changes in.

本発明によれば、照明光源の定格点灯時の色温度を白熱ランプの定格点灯時の色温度とほぼ等しくしておけば、発光ダイオードを光源とする場合においても白熱ランプに近い特性で照明光の光色及び照度を調整することができる。   According to the present invention, if the color temperature at the rated lighting of the illumination light source is substantially the same as the color temperature at the rated lighting of the incandescent lamp, the illumination light has characteristics similar to that of the incandescent lamp even when the light emitting diode is used as the light source. The light color and illuminance can be adjusted.

本発明によれば、発光ダイオードを光源とする場合においても白熱ランプに近い特性で照明光の光色及び照度を調整することができる。   According to the present invention, even when a light emitting diode is used as a light source, the light color and illuminance of illumination light can be adjusted with characteristics close to those of an incandescent lamp.

本発明の実施形態１を示し、（ａ）は全体構成図、（ｂ）は電源ユニットのブロック図、（ｃ）はＬＥＤ駆動部の回路構成図である。1 shows Embodiment 1 of the present invention, where (a) is an overall configuration diagram, (b) is a block diagram of a power supply unit, and (c) is a circuit configuration diagram of an LED drive unit. （ａ），（ｂ）は同上における照明光源の色温度−光量の特性を説明する説明図である。(A), (b) is explanatory drawing explaining the characteristic of the color temperature-light quantity of the illumination light source in the same as the above. 同上における電源ユニットの別構成を示すブロック図である。It is a block diagram which shows another structure of the power supply unit in the same as the above. 本発明の実施形態２を示し、（ａ）は全体構成図、（ｂ）は電源ユニットのブロック図である。Embodiment 2 of this invention is shown, (a) is a whole block diagram, (b) is a block diagram of a power supply unit. 同上における電源ユニットの別構成を示すブロック図である。It is a block diagram which shows another structure of the power supply unit in the same as the above.

（実施形態１）
本実施形態の照明装置は、図１（ａ）に示すように照明光源３と、コントローラ１と、電源ユニット２とで構成されている。照明光源３は、赤色系（Ｒ）、緑色系（Ｇ）、青色系（Ｂ）の３色の発光ダイオード３Ｒ，３Ｇ，３Ｂを有している。ここで、各色の発光ダイオード３Ｒ，３Ｇ，３Ｂの光色の色度座標がそれぞれ（ｘR，ｙR），（ｘG，ｙG），（ｘB，ｙB）であり、各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量がそれぞれＹR，ＹG，ＹBであるとすれば、混色光である照明光の光色の色度座標（ｘ0，ｙ0）及び光量Ｙ0は、下記の数１で表される。 (Embodiment 1)
The illuminating device of this embodiment is comprised by the illumination light source 3, the controller 1, and the power supply unit 2, as shown to Fig.1 (a). The illumination light source 3 includes light emitting diodes 3R, 3G, and 3B of three colors of red (R), green (G), and blue (B). Here, the chromaticity coordinates of the light colors of the light-emitting diodes 3R, 3G, and 3B of the respective colors are (x R , y R ), (x G , y G ), and (x B , y B ), respectively. If the light amounts of 3R, 3G, and 3B are Y R , Y G , and Y B , respectively, the chromaticity coordinates (x 0 , y 0 ) and the light amount Y 0 of the light color of the illumination light that is mixed color light are as follows: It is represented by the number 1.

Figure 2010176985
Figure 2010176985

ここにおいて、発光ダイオード３Ｒ，３Ｇ，３Ｂについては光量ＹR，ＹG，ＹBを変えても光色（光の波長）が変化しないので、発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBの比率を変化させることで混色として得られる照明光の光色を変えることができ、また、各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBの比率を保った状態で光量ＹR，ＹG，ＹBを変化させれば、同一の光色において照明光の光量を変えることができる。発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBは給電量によって決まるから、後述するように電源ユニット２から各発光ダイオード３Ｒ，３Ｇ，３Ｂに供給する給電量を増減することで照明光の光色並びに光量を調節することができる。 Here, for the light emitting diodes 3R, 3G, and 3B, the light color (wavelength of light) does not change even if the light amounts Y R , Y G , and Y B are changed, so the light amounts Y R , Y of the light emitting diodes 3R, 3G, and 3B are not changed. The light color of the illumination light obtained as a mixed color can be changed by changing the ratio of G and Y B, and the ratio of the light amounts Y R , Y G and Y B of the respective light emitting diodes 3R, 3G and 3B is maintained. If the light amounts Y R , Y G , Y B are changed in this state, the amount of illumination light can be changed in the same light color. Since the light amounts Y R , Y G , and Y B of the light emitting diodes 3R, 3G, and 3B are determined by the power supply amount, the power supply amount supplied from the power supply unit 2 to the light emitting diodes 3R, 3G, and 3B is increased or decreased as described later. The light color and amount of illumination light can be adjusted.

電源ユニット２は、図１（ｂ）に示すように、コントローラ１から制御信号が入力される制御信号入力部２０と、コントローラ１を通じて給電される交流電圧を所望の直流電圧に変換する交流／直流変換部２１と、緑色系の発光ダイオード３Ｇを駆動する緑系ＬＥＤ駆動部２２Ｇと、赤色系の発光ダイオード３Ｒを駆動する赤系ＬＥＤ駆動部２２Ｒと、青色系の発光ダイオード３Ｂを駆動する青系ＬＥＤ駆動部２２Ｂと、制御信号入力部２０に入力される制御信号を、緑系ＬＥＤ駆動部２２Ｇ、赤系ＬＥＤ駆動部２２Ｒ、青系ＬＥＤ駆動部２２Ｂに与えるべき駆動信号に変換する駆動信号変換部２３とを備えている。   As shown in FIG. 1B, the power supply unit 2 includes a control signal input unit 20 that receives a control signal from the controller 1, and an AC / DC that converts an AC voltage fed through the controller 1 into a desired DC voltage. Conversion unit 21, green LED driving unit 22G for driving green light emitting diode 3G, red LED driving unit 22R for driving red light emitting diode 3R, and blue system for driving blue light emitting diode 3B Drive signal conversion for converting the control signals input to the LED drive unit 22B and the control signal input unit 20 into drive signals to be supplied to the green LED drive unit 22G, the red LED drive unit 22R, and the blue LED drive unit 22B Part 23.

３つの駆動部２２Ｇ，２２Ｒ，２２Ｂは全て共通の構成を有するものであって、図１（ｃ）に示すように交流／直流変換部２１の高電位側の出力端と発光ダイオード３のアノードとの間に挿入された限流抵抗Ｒと、発光ダイオード３のカソードにソースが接続されるとともにドレインが交流／直流変換部２１の低電位側の出力端（グランド）に接続された電界効果トランジスタからなるスイッチング素子Ｑ１と、駆動信号変換部２３から出力される駆動信号を波形整形する波形整形回路とで構成される。この波形整形回路は従来周知のものであって、コレクタが交流／直流変換部２１の高電位側の出力端に接続され且つエミッタがスイッチング素子Ｑ１のゲートに接続されたＰＮＰ型のバイポーラトランジスタＴｒ１並びにコレクタがスイッチング素子Ｑ１のゲートに接続され且つエミッタがグランドに接続されたＮＰＮ型のバイポーラトランジスタＴｒ２からなり、並列接続された２つのトランジスタＴｒ１，Ｔｒ２のベースに入力される駆動信号を波形整形してスイッチング素子Ｑ１のゲートに出力する。ここで、駆動信号変換部２３ではオンデューティ比が可変である一定周期の矩形波信号からなる駆動信号を出力することにより、駆動部２２Ｇ，２２Ｒ，２２Ｂのスイッチング素子Ｑ１をＰＷＭ（パルス幅変調）制御して発光ダイオード３Ｇ，３Ｒ，３Ｂへの給電量を調節している。   The three drive units 22G, 22R, and 22B all have a common configuration. As shown in FIG. 1C, the output terminal on the high potential side of the AC / DC conversion unit 21, the anode of the light emitting diode 3, and A current-limiting resistor R inserted between the source and the cathode of the light emitting diode 3 and a field effect transistor having a drain connected to the output terminal (ground) on the low potential side of the AC / DC converter 21. And a waveform shaping circuit that shapes the drive signal output from the drive signal conversion unit 23. This waveform shaping circuit is well known in the art, and includes a PNP bipolar transistor Tr1 having a collector connected to the output terminal on the high potential side of the AC / DC converter 21 and an emitter connected to the gate of the switching element Q1. The NPN type bipolar transistor Tr2 has a collector connected to the gate of the switching element Q1 and an emitter connected to the ground. The drive signal input to the bases of the two transistors Tr1 and Tr2 connected in parallel is waveform-shaped. Output to the gate of the switching element Q1. Here, the drive signal conversion unit 23 outputs a drive signal composed of a rectangular wave signal having a constant cycle with a variable on-duty ratio, whereby the switching element Q1 of the drive units 22G, 22R, and 22B is PWM (pulse width modulation). The amount of power supplied to the light emitting diodes 3G, 3R, and 3B is adjusted by control.

コントローラ１は箱形の合成樹脂成形品からなるハウジング１０を有し、ハウジング１０の前面に円筒形状の操作部１１と電源スイッチの操作釦１２が配設されている（図１（ａ）参照）。電源スイッチ（図示せず）はタンブラスイッチや押釦スイッチからなり、交流電源ＡＣから電源ユニット２への給電経路を開閉するものである。ハウジング１０内には操作部１１の操作によって抵抗値が変化する可変抵抗器（図示せず）、可変抵抗器の抵抗値をＡ／Ｄ変換するＡ／Ｄ変換器（図示せず）、Ａ／Ｄ変換器でデジタル値に変換された抵抗値に基づいて制御信号を生成する制御信号生成部（図示せず）が収納されている。   The controller 1 has a housing 10 made of a box-shaped synthetic resin molded product, and a cylindrical operation section 11 and a power switch operation button 12 are disposed on the front surface of the housing 10 (see FIG. 1A). . The power switch (not shown) includes a tumbler switch and a push button switch, and opens and closes a power feeding path from the AC power supply AC to the power supply unit 2. Inside the housing 10 are a variable resistor (not shown) whose resistance value is changed by operating the operation unit 11, an A / D converter (not shown) for A / D converting the resistance value of the variable resistor, A / A control signal generation unit (not shown) that generates a control signal based on the resistance value converted into a digital value by the D converter is housed.

操作部１１はハウジング１０に対して約３１５度（７／４π）の範囲で回動自在に設けられており、前面に形成されているマーク１１ａが６時の位置にあるときに可変抵抗器の抵抗値が最小値となり、当該マーク１１ａが４時の位置と５時の位置の中間位置（４時半の位置）にあるときに可変抵抗器の抵抗値が最大値となる。そして、６時の位置と４時半の位置との間で操作部１１が時計回り及び反時計回りに回動するときに可変抵抗器の抵抗値が直線的に変化し、当該抵抗値に基づいて操作部１１の操作量（マーク１１ａの位置）を知ることができる。制御信号生成部は、可変抵抗器の抵抗値の最小値から最大値までの値と一対一に対応するオンデューティ比を有した制御信号（ＰＷＭ信号）を生成して電源ユニット２に出力する。ここで、操作部１１の操作量、すなわち、制御信号のオンデューティ比が照明光源３の照明光の光色（色温度）に対応している。   The operation unit 11 is provided so as to be rotatable within a range of about 315 degrees (7 / 4π) with respect to the housing 10, and when the mark 11 a formed on the front surface is at the 6 o'clock position, The resistance value becomes the minimum value, and the resistance value of the variable resistor becomes the maximum value when the mark 11a is at an intermediate position between the 4 o'clock position and the 5 o'clock position (position at 4:30). Then, when the operation unit 11 rotates clockwise and counterclockwise between the 6 o'clock position and the 4:30 position, the resistance value of the variable resistor changes linearly, based on the resistance value. Thus, the operation amount of the operation unit 11 (the position of the mark 11a) can be known. The control signal generation unit generates a control signal (PWM signal) having an on-duty ratio that has a one-to-one correspondence with a value from the minimum value to the maximum value of the resistance value of the variable resistor, and outputs the control signal to the power supply unit 2. Here, the operation amount of the operation unit 11, that is, the on-duty ratio of the control signal corresponds to the light color (color temperature) of the illumination light of the illumination light source 3.

電源ユニット２においては、コントローラ１の制御信号生成部から出力される制御信号が、制御信号入力部２０によってオンデューティ比（色温度）に対応した電圧レベルの直流電圧信号に変換され、さらに当該直流電圧信号が、駆動信号変換部２３にて各色系のＬＥＤ駆動部２２Ｇ，２２Ｒ，２２Ｂに対する駆動信号に変換される。駆動信号変換部２３はマイコンとメモリを有しており、直流電圧信号の信号レベル（色温度）、当該色温度に対応する照明光の光色の色度座標（ｘ0，ｙ0）、当該色度座標と対応する各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBの比率、並びに各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBの対応関係を表した変換テーブルがメモリに格納され、当該変換テーブルに基づいてマイコンにより直流電圧信号を駆動信号に変換する。 In the power supply unit 2, the control signal output from the control signal generation unit of the controller 1 is converted by the control signal input unit 20 into a DC voltage signal having a voltage level corresponding to the on-duty ratio (color temperature). The voltage signal is converted by the drive signal converter 23 into drive signals for the LED drivers 22G, 22R, and 22B of the respective colors. The drive signal conversion unit 23 includes a microcomputer and a memory, and the signal level (color temperature) of the DC voltage signal, the chromaticity coordinates (x 0 , y 0 ) of the light color of the illumination light corresponding to the color temperature, The ratio of the light amounts Y R , Y G , Y B of the light emitting diodes 3R, 3G, 3B corresponding to the chromaticity coordinates, and the correspondence relationship of the light amounts Y R , Y G , Y B of the light emitting diodes 3R, 3G, 3B are shown. The represented conversion table is stored in the memory, and the DC voltage signal is converted into a drive signal by the microcomputer based on the conversion table.

ところで、照明光の光色と光量を互いに独立して調節することが可能ではあるが、従来技術で説明したように白熱ランプを光源とする既存の照明装置からの置き換えを考慮した場合、白熱ランプを調光したときに得られる照度（光量）と光色（色温度）の特性を模擬することが望ましい。   By the way, although it is possible to adjust the light color and the light amount of the illumination light independently of each other, the incandescent lamp is considered when replacing the existing illumination device using the incandescent lamp as the light source as described in the prior art. It is desirable to simulate the characteristics of illuminance (light quantity) and light color (color temperature) obtained when the light is adjusted.

そこで本実施形態では、図２（ａ）に曲線イで示す白熱ランプの光量−色温度特性と同様に、定格点灯時の白熱ランプの色温度（例えば、一般的なミニハロゲン電球であれば約２８００Ｋ）以下の範囲において操作部１１の操作量に対応して照明光の色温度並びに光量が連動して増減し且つ照明光の色度が黒体軌跡（図２（ｂ）の曲線ロ参照）にほぼ沿って変化するとともに光量が相対的に大きいときの色温度の変化に対して光量が相対的に小さいときの色温度の変化が大きくなるように各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量ＹR，ＹG，ＹBを決定している。 Therefore, in the present embodiment, the color temperature of the incandescent lamp at the rated lighting (for example, about a typical mini-halogen bulb is about the same as the light quantity-color temperature characteristic of the incandescent lamp shown by the curve A in FIG. 2A). 2800K) In the following range, the color temperature and the amount of light of the illumination light are increased or decreased in association with the operation amount of the operation unit 11, and the chromaticity of the illumination light is a black body locus (see the curve (b) in FIG. 2B). And the light amount Y of each of the light emitting diodes 3R, 3G, and 3B so that the change in the color temperature when the light amount is relatively small is larger than the change in the color temperature when the light amount is relatively large. R 1 , Y G , and Y B are determined.

而して、コントローラ１の操作部１１の操作量（マーク１１ａの位置）に応じて照明光の色温度が定格点灯時の色温度（約２８００Ｋ）以下の範囲で増減し且つ照明光の色度が黒体軌跡にほぼ沿って変化するとともに光量Ｙ0が相対的に大きいときの色温度の変化に対して光量Ｙ0が相対的に小さいときの色温度の変化が大きくなるように、駆動信号変換部２３で制御信号から駆動信号に変換される。 Thus, the color temperature of the illumination light increases or decreases in the range below the color temperature at the rated lighting (about 2800 K) according to the operation amount of the operation unit 11 of the controller 1 (the position of the mark 11a), and the chromaticity of the illumination light. So that the change in the color temperature when the light amount Y 0 is relatively small with respect to the change in the color temperature when the light amount Y 0 is relatively large and the change in the color temperature when the light amount Y 0 is relatively large. The conversion unit 23 converts the control signal into a drive signal.

上述のように本実施形態によれば、操作入力受付手段（コントローラ１の操作部１１，可変抵抗器，Ａ／Ｄ変換器）で受け付ける操作入力に応じて、決定手段（コントローラ１の制御信号生成部，電源ユニット２の制御信号入力部２０及び駆動信号変換部２３）が、照明光源３の定格点灯時の色温度（本実施形態では約２８００Ｋ）以下の範囲において、操作入力の変化に対応して照明光の色温度並びに光量が連動して増減し且つ照明光の色度が黒体軌跡にほぼ沿って変化するとともに光量が相対的に大きいときの色温度の変化に対して光量が相対的に小さいときの色温度の変化が大きくなるように照明光源３の各発光ダイオード３Ｒ，３Ｇ，３Ｂの光量を決定するので、照明光源３を発光ダイオードで構成する場合においても白熱ランプに近い特性で照明光の光色及び照度を調整することができる。   As described above, according to the present embodiment, the determination means (the control signal generation of the controller 1 is generated according to the operation input received by the operation input reception means (the operation unit 11 of the controller 1, the variable resistor, the A / D converter). The control signal input unit 20 and the drive signal conversion unit 23) of the power supply unit 2 correspond to the change of the operation input within the range of the color temperature at the rated lighting of the illumination light source 3 (about 2800K in this embodiment) or less. The color temperature and light quantity of the illumination light increase or decrease in conjunction with each other, and the illuminance changes relative to the black body locus and the light quantity is relative to the change in color temperature when the light quantity is relatively large. Since the light quantity of each of the light emitting diodes 3R, 3G, 3B of the illumination light source 3 is determined so that the change in color temperature when the illumination light source 3 is small, the incandescent lamp is used even when the illumination light source 3 is composed of light emitting diodes. It is possible to adjust the light color and intensity of the illumination light have properties.

また、図３は電源ユニット２の別の構成を示すブロック図である。この構成においては、制御信号入力部２０から出力される直流電圧信号を各色系のＬＥＤ駆動部２２Ｇ，２２Ｒ，２２Ｂに対する駆動信号に変換する駆動信号変換部２３の機能が各ＬＥＤ駆動部２２Ｇ，２２Ｒ，２２Ｂに搭載され、駆動信号変換部２３が省略されている。   FIG. 3 is a block diagram showing another configuration of the power supply unit 2. In this configuration, the function of the drive signal conversion unit 23 that converts the DC voltage signal output from the control signal input unit 20 into a drive signal for the LED drive units 22G, 22R, and 22B of each color system is the LED drive unit 22G, 22R. , 22B, and the drive signal converter 23 is omitted.

（実施形態２）
本実施形態の照明装置は、図４に示すように実施形態１におけるコントローラ１のハウジング１０内に電源ユニット２を内蔵した点に特徴があり、基本的な構成は実施形態１と共通である。よって、実施形態１と共通の構成要素には同一の符号を付して説明を省略する。 (Embodiment 2)
The illumination device of the present embodiment is characterized in that the power supply unit 2 is built in the housing 10 of the controller 1 in the first embodiment as shown in FIG. 4, and the basic configuration is the same as that of the first embodiment. Therefore, the same code | symbol is attached | subjected to the same component as Embodiment 1, and description is abbreviate | omitted.

本実施形態においては、操作部１１の操作によって抵抗値が変化する可変抵抗器（図示せず）、可変抵抗器の抵抗値をＡ／Ｄ変換するＡ／Ｄ変換器（図示せず）、Ａ／Ｄ変換器でデジタル値に変換された抵抗値に基づいて色温度に対応した直流電圧信号を生成するコントローラ入力部２４が制御信号入力部２０の代わりにハウジング１０内に収納されている。但し、コントローラ入力部２４から出力される直流電圧信号は実施形態１における制御信号入力部２０から出力される直流電圧信号と共通である。また図４（ｂ）では実施形態１で図示を省略していた電源スイッチＳＷを図示している。   In the present embodiment, a variable resistor (not shown) whose resistance value is changed by operation of the operation unit 11, an A / D converter (not shown) for A / D converting the resistance value of the variable resistor, A A controller input unit 24 that generates a DC voltage signal corresponding to the color temperature based on the resistance value converted into a digital value by the / D converter is housed in the housing 10 instead of the control signal input unit 20. However, the DC voltage signal output from the controller input unit 24 is common to the DC voltage signal output from the control signal input unit 20 in the first embodiment. FIG. 4B illustrates the power switch SW that is not illustrated in the first embodiment.

而して、実施形態１ではコントローラ１と電源ユニット２を別々に設置して給電用の電線と制御信号伝送用の電線で接続する必要があるが、本実施形態ではコントローラ１の設置のみで電線の配線が省略できるという利点がある。   Thus, in the first embodiment, it is necessary to install the controller 1 and the power supply unit 2 separately and connect them with a power supply wire and a control signal transmission wire. There is an advantage that the wiring can be omitted.

また、図５はコントローラ１の別の構成を示すブロック図である。この構成においては、コントローラ入力部２４から出力される直流電圧信号を各色系のＬＥＤ駆動部２２Ｇ，２２Ｒ，２２Ｂに対する駆動信号に変換する駆動信号変換部２３の機能が各ＬＥＤ駆動部２２Ｇ，２２Ｒ，２２Ｂに搭載され、駆動信号変換部２３が省略されている。   FIG. 5 is a block diagram showing another configuration of the controller 1. In this configuration, the function of the drive signal conversion unit 23 that converts the DC voltage signal output from the controller input unit 24 into a drive signal for the LED drive units 22G, 22R, and 22B of each color system is the LED drive unit 22G, 22R, The drive signal conversion unit 23 is omitted.

尚、実施形態１，２では照明光源３として赤色系，緑色系，青色系の３色（３種類）の発光ダイオード３Ｒ，３Ｇ，３Ｂを用いているが、例えば、白色系と赤色系の２色（２種類）の発光ダイオードを用いて照明光源３を構成し、白色系の発光ダイオードの光量と赤色系の発光ダイオードの光量の比率並びに絶対値を調整することで白熱ランプの光量−色温度特性に近似した特性で光量と色温度を変化させることも可能である。この場合、制御対象の発光ダイオードの個数が減ることで駆動信号変換部２３における信号処理が簡素化できるという利点がある。   In the first and second embodiments, the red, green, and blue light emitting diodes 3R, 3G, and 3B are used as the illumination light source 3. However, for example, white and red 2 The illumination light source 3 is composed of light emitting diodes of two colors (colors), and the light quantity of the incandescent lamp-color temperature is adjusted by adjusting the ratio and absolute value of the light quantity of the white light emitting diode and the light quantity of the red light emitting diode. It is also possible to change the light amount and the color temperature with characteristics close to the characteristics. In this case, there is an advantage that the signal processing in the drive signal converter 23 can be simplified by reducing the number of light emitting diodes to be controlled.

１ コントローラ
２ 電源ユニット
３ 照明光源
３Ｒ 赤色系の発光ダイオード
３Ｇ 緑色系の発光ダイオード
３Ｂ 青色系の発光ダイオード
１１ 操作部（操作入力受付手段）
２０ 制御信号入力部（決定手段）
２２Ｇ 緑系ＬＥＤ駆動部（駆動手段）
２２Ｒ 赤系ＬＥＤ駆動部（駆動手段）
２２Ｂ 青系ＬＥＤ駆動部（駆動手段）
２３ 駆動信号変換部（決定手段） DESCRIPTION OF SYMBOLS 1 Controller 2 Power supply unit 3 Illumination light source 3R Red light emitting diode 3G Green light emitting diode 3B Blue light emitting diode 11 Operation part (operation input reception means)
20 Control signal input unit (decision means)
22G Green LED drive unit (drive means)
22R Red LED drive unit (drive means)
22B Blue LED drive unit (drive means)
23 Drive signal converter (determining means)

Claims (1)

光色が異なる複数の発光ダイオードを有する照明光源と、これら複数の発光ダイオードを個別且つ任意の光量で発光させる駆動手段と、人による操作入力を受け付ける操作入力受付手段と、照明光源から照射される照明光の色温度並びに光量が操作入力受付手段で受け付ける操作入力に応じた色温度並びに光量となるように照明光源の各発光ダイオードの光量を決定する決定手段とを備え、駆動手段は、それぞれの発光ダイオードを決定手段が決定した光量で発光させ、決定手段は、照明光源の定格点灯時の色温度以下の範囲において、操作入力の変化に対応して照明光の色温度並びに光量が連動して増減し且つ照明光の色度が黒体軌跡にほぼ沿って変化するとともに光量が相対的に大きいときの色温度の変化に対して光量が相対的に小さいときの色温度の変化が大きくなるように照明光源の各発光ダイオードの光量を決定することを特徴とする照明装置。   Irradiated from an illumination light source having a plurality of light emitting diodes having different light colors, a driving unit that emits the plurality of light emitting diodes individually and with an arbitrary amount of light, an operation input receiving unit that receives an operation input by a person, and an illumination light source Determining means for determining the light quantity of each light emitting diode of the illumination light source so that the color temperature and the light quantity of the illumination light become the color temperature and the light quantity according to the operation input received by the operation input accepting means; The light emitting diode emits light with the light amount determined by the determining means, and the determining means is linked with the color temperature and the light amount of the illumination light corresponding to the change of the operation input in the range below the color temperature at the rated lighting of the illumination light source. The amount of light is relatively small with respect to the change in color temperature when the chromaticity of the illumination light changes almost along the black body locus and the amount of light is relatively large. Lighting apparatus characterized by determining the quantity of each light emitting diode illumination source such that the change in Kino color temperature increases.
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JP2008541361A (en) * 2005-05-11 2008-11-20 アーノルド・ウント・リヒター・シネ・テヒニク・ゲーエムベーハー・ウント・コンパニ・ベトリーブス・カーゲー Spotlights for film and video photography
JP2007059260A (en) * 2005-08-25 2007-03-08 Toshiba Lighting & Technology Corp Illumination device and illumination fixture

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JP2013536564A (en) * 2010-08-27 2013-09-19 シカト・インコーポレイテッド LED-based lighting module toned with any light source
JP2012221770A (en) * 2011-04-11 2012-11-12 Mitsubishi Electric Corp Illuminating device
JP2014222581A (en) * 2013-05-13 2014-11-27 パナソニック株式会社 Illuminating device
JP2015159124A (en) * 2015-04-27 2015-09-03 三菱電機株式会社 Luminaire

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EP2219418A3 (en) 2015-09-09
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