EP2219418A2 - Beleuchtungsvorrichtung - Google Patents

Beleuchtungsvorrichtung Download PDF

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Publication number
EP2219418A2
EP2219418A2 EP10000707A EP10000707A EP2219418A2 EP 2219418 A2 EP2219418 A2 EP 2219418A2 EP 10000707 A EP10000707 A EP 10000707A EP 10000707 A EP10000707 A EP 10000707A EP 2219418 A2 EP2219418 A2 EP 2219418A2
Authority
EP
European Patent Office
Prior art keywords
light
illumination
color temperature
illumination light
light emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10000707A
Other languages
English (en)
French (fr)
Other versions
EP2219418A3 (de
EP2219418B1 (de
Inventor
Minoru Maehara
Kazuyoshi Kadotani
Kenichiro Tanaka
Itirou Tanimura
Nobuta Takuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Electric Works Co Ltd
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Publication date
Application filed by Panasonic Electric Works Co Ltd filed Critical Panasonic Electric Works Co Ltd
Publication of EP2219418A2 publication Critical patent/EP2219418A2/de
Publication of EP2219418A3 publication Critical patent/EP2219418A3/de
Application granted granted Critical
Publication of EP2219418B1 publication Critical patent/EP2219418B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • 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

Definitions

  • the present invention relates to an illumination device in which a light color of illumination light is made variable.
  • the patent document 1 disclose, for example, the illumination device provided with an illumination unit having a red light emitting diode, a green light emitting diode, and a blue light emitting diode, and a control unit for driving each color light emitting diode of the illumination unit and adjusting a light amount (illumination intensity) thereof, wherein an operation part provided in the control unit for each color is operated individually to adjust the light amount of each color (red, green and blue) to make the light color (color temperature) of the illumination light (mixed color light) variable.
  • Patent document 1 Japanese Unexamined Patent Publication No. 2008-293946
  • the illumination device (illumination fixture) using the light emitting diode as a light source is often utilized as an alternative to an illumination device (illumination fixture) using an incandescent lamp as a light source.
  • the incandescent lamp has a characteristic, as shown in Figs. 2(a) and 2(b) , in which the color temperature decreases in the same way as chromaticity of illumination light changing along a blackbody locus together with decrease in the light amount when a dimming ratio (light amount) is decreased with the time of rated lighting being set as 100%.
  • a dimming ratio dim amount
  • the light emitting diode is dimmed, a characteristic is found in which only light amount is varied without varying a light wavelength.
  • an object of the present invention is to provide an illumination device capable of adjusting a light color and an illumination intensity of the illumination light with the characteristic proximate to the incandescent lamp even in the case where the light emitting diode is used as the light source.
  • the present invention includes an illumination light source having a plurality of light emitting diodes with different light colors; driving means adapted to make a plurality of light emitting diodes emit light individually and with an arbitrary light amount; operation input receiving means adapted to receive an operation input by a human; and determination means adapted to determine the light amount of each light emitting diode of the illumination light source so that a color temperature and a light amount of illumination light irradiated from the illumination light source are a color temperature and a light amount corresponding to an operation input received at the operation input receiving means, wherein the driving means makes each light emitting diode emit light with the light amount determined by the determination means; and the determination means determines a light amount of each light emitting diode of the illumination light source so that the color temperature and the light amount of the illumination light increases and decreases in conjunction with each other corresponding to a change in the operation input within a range lower than a color temperature at the time of rated lighting of the illumination light source, and chromat
  • the color temperature of the illumination light source at the time of rated lighting is set almost equal to a color temperature of an incandescent lamp at the time of rated lighting, so that the light color and the illumination intensity of the illumination light can be adjusted with a characteristic proximate to the incandescent lamp even in the case where the light emitting diode is used as a light source.
  • the light color and the illumination intensity of the illumination light can be adjusted with the characteristics proximate to the incandescent lamp even in the case where the light emitting diode is used as the light source.
  • An illumination device is composed of an illumination light source 3, a controller 1, and a power source unit 2, as shown in Fig. 1(a) .
  • the illumination light source 3 has three-color light emitting diodes 3R, 3G, and 3B, i.e., red (R), green (G) and blue (B).
  • chromaticity coordinates of the light colors of the light emitting diodes 3R, 3G and 3B having their own colors are (x R , y R ), (x G , y G ) and (x B , y B ), respectively.
  • chromaticity coordinates (xo, y 0 ) of the light color and the light amount Yo of illumination light as being mixed color light are expressed in a following formula 1.
  • the variation in a ratio among the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B can change the light color of the illumination light obtained as a mixed color. Furthermore, a change in the light amounts Y R , Y G and Y B while keeping the ratio among the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B can change a light amount of the illumination light in one same light color.
  • the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B are determined depending on an amount of supplied power, an increase and a decrease in the amount of power supplied from the power source unit 2 to the light emitting diodes 3R, 3G and 3B enables the light color and light amount of the illumination light to be adjusted, as discussed later.
  • the power supply unit 2 is provided with a control signal input part 20 to which a control signal is inputted from the controller 1, an AC/DC converting part 21 for converting an AC voltage supplied through the controller 1 into a desired DC voltage, a green LED driving part 22G for driving a green light emitting diode 3G, a red LED driving part 22R for driving a red light emitting diode 3R, a blue LED driving part 22B for driving a blue light emitting diode 3B, and a drive signal converting part 23 for converting a control signal inputted to the control signal input part 20 into a drive signal to be fed to the green LED driving part 22G, the red LED driving part 22R, and the blue LED driving part 22B.
  • Each of three driving parts 22G, 22R and 22B have a same configuration in common which is structured by a current-limiting resistor R that is inserted between an output terminal at a higher potential side of the AC/DC converting part 21 and an anode of the light emitting diode 3, a switching element Q1 including a field-effect transistor having a source connected to a cathode of the light emitting diode 3 and a drain connected to an output terminal at a lower potential side (a ground) of the AC/DC converting part 21, and a waveform shaping circuit for shaping a waveform of the drive signal outputted from the drive signal converting part 23, as shown in Fig. 1(c) .
  • the waveform shaping circuit which is conventionally known, includes a PNP-type bipolar transistor Tr1 in which a collector is connected to the output terminal at the higher potential side of the AC/DC converting part 21 and an emitter is connected to a gate of the switching element Q1, and an NPN-type bipolar transistor Tr2 in which a collector is connected to the gate of the switching element Q1 and an emitter is connected to the ground.
  • the waveform shaping circuit shapes the waveform of the drive signal to be inputted to two transistors Tr1 and Tr2 connected in parallel with each other to output it to a gate of the switching element Q1.
  • the controller 1 has a housing 10 including a box-shaped molded synthetic resin, and a cylindrical-shaped operating part 11 and an operation button 12 of a power source switch are arranged on a front surface of the housing 10 (refer to Fig. 1(a) ).
  • a power source switch (not shown), which includes a tumbler switch or a push button switch, is for opening and closing a power supply path from the AC power source AC to the power source unit 2.
  • the housing 10 accommodates therein a variable resistor (not shown) whose resistance value changes through an operation of the operating part 11, an A/D converting part (not shown) for A/D converting the resistance value of the variable resistor, and a control signal generating part (not shown) for generating a control signal based on the resistance value converted into a digital value by the A/D converting part.
  • the operation part 11 is provided rotatably to the housing 10 in a range of about 315° (7/4 ⁇ ).
  • the resistance value of the variable resistor becomes minimum when a mark 11a formed on the front surface is positioned at six o'clock, and the resistance value of the variable resistor becomes maximum when the mark 11a is positioned at a midpoint between a position of four o'clock and a position of five o'clock (the position of four thirty). Then, the resistance value of the variable resistor varies linearly when the operating part 11 rotates clockwise or counterclockwise between the position of six o'clock and a position of four thirty, so that an operation amount of the operating part 11 (the position of the mark 11a) can be notified based on the resistance value.
  • the control signal generating part generates a control signal (a PWM signal) having an on-duty ratio corresponding one-to-one to the values from the minimum to the maximum of the resistance value of the variable resistor, and then outputs it to the power source unit 2.
  • a control signal (a PWM signal) having an on-duty ratio corresponding one-to-one to the values from the minimum to the maximum of the resistance value of the variable resistor, and then outputs it to the power source unit 2.
  • the operation amount of the operating part 11, i.e., the on-duty ratio of the control signal corresponds to the light color of the illumination light (the color temperature) of the illumination light source 3.
  • the control signal outputted from the control signal generating part of the controller 1 is converted into a DC voltage signal with a voltage level corresponding to the on-duty ratio (the color temperature) by the control signal input part 20, and also the DC voltage signal is converted into a drive signal to the each color LED driving parts 22G, 22R and 22B at the drive signal converting part 23.
  • the drive signal converting part 23 has a microcomputer and a memory.
  • the memory stores the conversion table representing a signal level of the DC voltage signal (the color temperature), chromaticity coordinates (xo, yo) of the light color of the illumination light corresponding to the color temperature, a ratio among the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B corresponding to the chromaticity coordinates, and a correspondence relation among the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B.
  • the microcomputer converts the DC voltage signal into the drive signal based on the conversion table.
  • the characteristics of the illumination intensity (the light mount) and the light color (the color temperature) obtained at the time of dimming the incandescent lamp considering replacement of the existing illumination device using the incandescent lamp as the light source, as described in the conventional technique.
  • the light amounts Y R , Y G and Y B of the light emitting diodes 3R, 3G and 3B are determined so that the color temperature and the light amount of the illumination light increases and decreases in conjunction with each other corresponding to the operation amount of the operating part 11 within a range lower than the color temperature of the incandescent lamp at the time of rated lighting (for example, about 2,800K in the case of a typical mini halogen bulb), and the chromaticity of the illumination light varies approximately along a blackbody locus (refer to a curve line B in Fig. 2(b) ), as well as 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, similar to the light amount/color temperature characteristics shown by a curve line A in Fig. 2(a)
  • the control signal is converted into the drive signal at the drive signal converting part 23 so that the color temperature of the illumination light increases and decreases within the range lower than the color temperature at the time of rated lighting (about 2,800K) corresponding to the operation amount of the operating part 11 of the controller 1 (the position of the mark 11a), and the chromaticity of the illumination light varies approximately along a blackbody locus, as well as the change in a color temperature when the light amount Yo is relatively small is larger than a change in a color temperature when the light amount Yo is relatively large.
  • the determination means determines the light amounts of the light emitting diodes 3R, 3G and 3B of the illumination light source 3, corresponding to the operation input received at the operation input receiving means (the operating part 11 of the controller 1, the variable resistor, and the A/C converting part), so that the color temperature and the light amount of the illumination light increases and decreases in conjunction with each other corresponding to a change in the operation input within a range lower than the color temperature at the time of rated lighting of the illumination light source 3 (about 2,800K in the present embodiment), and the chromaticity of the illumination light varies approximately along a blackbody locus, as well as the change in the color temperature when the light amount is relatively small is larger than the change in color temperature when the light amount is relatively large. Therefore, the light color and the illumination intensity of the illumination light can be adjusted with the characteristics proximate to the incandescent lamp
  • Fig. 3 is a block diagram showing other structure of the power source unit 2.
  • a function of the drive signal converting part 23, which converts the DC voltage signal outputted from the control signal input part 20 into a drive signal to each color of the LED driving part 22G, 22R and 22B, is included in the each LED driving part 22G, 22R and 22B, and the drive signal converting part 23 is omitted.
  • the feature of the illumination device of the present embodiment is that the power source unit 2 is integrated into the housing 10 of the controller 1 in the first embodiment, as shown in Fig. 4 , and a basic structure is same as that in the first embodiment. Therefore, a like component is denoted by a like reference numeral and the description thereof will be omitted.
  • the housing 10 accommodates therein a variable resistor (not shown) whose resistance value varies through an operation of the operation part 11, an A/D converting part (not shown) for A/D converting a resistance value of the variable resistor, and, instead of the control signal input part 20, a controller input part 24 for generating a DC voltage signal corresponding to a color temperature based on the resistance value converted into a digital value at the A/D converter.
  • the DC voltage signal outputted from the controller input part 24, however, is identical to the DC voltage signal outputted from the control signal input part 20 in the first embodiment.
  • Fig. 4(b) illustrates a power source switch SW that does not illustrated in the first embodiment.
  • the first embodiment requires arranging the controller 1 and the power source unit 2 separately to connect them by wires, one for supplying the power and the other for transmitting the control signal
  • the present embodiment advantageously requires only the arrangement of the controller 1 and can omit the wiring of the wires.
  • Fig. 5 shows a block diagram showing the other structure of the controller 1.
  • a function of the drive signal converting part 23, which converts the DC voltage signal outputted from the controller input part 24 into a drive signal to each color LED driving part 22G, 22R and 22B, is included in each LED driving part 22G, 22R and 22B, and the drive signal converting part 23 is omitted.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP10000707.9A 2009-01-28 2010-01-25 Beleuchtungsvorrichtung Active EP2219418B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009017108A JP2010176985A (ja) 2009-01-28 2009-01-28 照明装置

Publications (3)

Publication Number Publication Date
EP2219418A2 true EP2219418A2 (de) 2010-08-18
EP2219418A3 EP2219418A3 (de) 2015-09-09
EP2219418B1 EP2219418B1 (de) 2019-08-28

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EP (1) EP2219418B1 (de)
JP (1) JP2010176985A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2728972A1 (de) * 2012-10-31 2014-05-07 Helvar Oy Ab Steuerung des Betriebs von Lichtquellen
CN104105270A (zh) * 2014-07-29 2014-10-15 苏州乐聚一堂电子科技有限公司 智能双面变色平板灯具
CN104105269A (zh) * 2014-07-29 2014-10-15 苏州乐聚一堂电子科技有限公司 智能两圈变色平板灯具
CN104159366A (zh) * 2014-07-29 2014-11-19 苏州乐聚一堂电子科技有限公司 智能多圈变色平板灯具
CN105744685A (zh) * 2016-04-20 2016-07-06 黄初镇 一种减少照明闪烁的装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120051045A1 (en) * 2010-08-27 2012-03-01 Xicato, Inc. Led Based Illumination Module Color Matched To An Arbitrary Light Source
JP5740193B2 (ja) * 2011-04-11 2015-06-24 三菱電機株式会社 照明装置
JP6210405B2 (ja) * 2013-05-13 2017-10-11 パナソニックＩｐマネジメント株式会社 照明装置
JP5926836B2 (ja) * 2015-04-27 2016-05-25 三菱電機株式会社 照明装置

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2008293946A (ja) 2007-05-22 2008-12-04 Prodisc Technology Inc 照明装置

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US7014336B1 (en) * 1999-11-18 2006-03-21 Color Kinetics Incorporated Systems and methods for generating and modulating illumination conditions
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JP4495814B2 (ja) * 1999-12-28 2010-07-07 アビックス株式会社 調光式ｌｅｄ照明器具
JP2004095369A (ja) * 2002-08-30 2004-03-25 Matsushita Electric Works Ltd 照明装置
US20050225264A1 (en) * 2004-03-30 2005-10-13 Kemp William H LED lamp with color and brightness controller for use in wet, electrically hazardous bathing environments
DE102005022832A1 (de) * 2005-05-11 2006-11-16 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Scheinwerfer für Film- und Videoaufnahmen
JP2007059260A (ja) * 2005-08-25 2007-03-08 Toshiba Lighting & Technology Corp 照明装置及び照明器具
WO2008129485A1 (en) * 2007-04-24 2008-10-30 Koninklijke Philips Electronics N. V. User interface for multiple light control dimensions

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2008293946A (ja) 2007-05-22 2008-12-04 Prodisc Technology Inc 照明装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2728972A1 (de) * 2012-10-31 2014-05-07 Helvar Oy Ab Steuerung des Betriebs von Lichtquellen
CN103796378A (zh) * 2012-10-31 2014-05-14 赫尔瓦有限公司 光源的控制操作
EP2728972B1 (de) 2012-10-31 2015-08-26 Helvar Oy Ab Steuerung des Betriebs von Lichtquellen
CN103796378B (zh) * 2012-10-31 2019-02-12 赫尔瓦有限公司 光源的控制操作
CN104105270A (zh) * 2014-07-29 2014-10-15 苏州乐聚一堂电子科技有限公司 智能双面变色平板灯具
CN104105269A (zh) * 2014-07-29 2014-10-15 苏州乐聚一堂电子科技有限公司 智能两圈变色平板灯具
CN104159366A (zh) * 2014-07-29 2014-11-19 苏州乐聚一堂电子科技有限公司 智能多圈变色平板灯具
CN105744685A (zh) * 2016-04-20 2016-07-06 黄初镇 一种减少照明闪烁的装置

Also Published As

Publication number Publication date
JP2010176985A (ja) 2010-08-12
EP2219418A3 (de) 2015-09-09
EP2219418B1 (de) 2019-08-28

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