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WO2014097904A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2014097904A1
WO2014097904A1 PCT/JP2013/082839 JP2013082839W WO2014097904A1 WO 2014097904 A1 WO2014097904 A1 WO 2014097904A1 JP 2013082839 W JP2013082839 W JP 2013082839W WO 2014097904 A1 WO2014097904 A1 WO 2014097904A1
Authority
WO
WIPO (PCT)
Prior art keywords
light emitting
emitting elements
current
adjustment circuit
amount
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.)
Ceased
Application number
PCT/JP2013/082839
Other languages
English (en)
Japanese (ja)
Inventor
正利 米山
伸哉 三木
淳弥 若原
司 八木
将積　直樹
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2014553076A priority Critical patent/JPWO2014097904A1/ja
Publication of WO2014097904A1 publication Critical patent/WO2014097904A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H10K59/80516—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80522—Cathodes combined with auxiliary electrodes

Definitions

  • the present invention relates to an illumination device including a plurality of light emitting elements connected in series to a constant current source.
  • Patent Document 1 JP-T-2010-524221 discloses an invention relating to a method for driving a light emitting diode. This driving method shows a configuration in which the luminance of light-emitting diodes connected in series can be individually adjusted.
  • a drive system that adjusts the amount of current flowing through each light emitting diode connected in series by supplying the main current and controlling the current drawn from the intermediate electrode between the light emitting diodes with respect to the main current Is disclosed.
  • Patent Document 1 JP-T-2010-524221
  • the current flowing through the light emitting diode at the final stage is regulated by the current flowing through the light emitting diode at the previous stage, so that calculation adjustment is necessary, and the circuit configuration becomes complicated. is there.
  • An object of the present invention is to provide an illuminating device that can easily and independently adjust the amount of current flowing through each light emitting element in a configuration in which a plurality of light emitting elements are connected in series.
  • An illuminating device includes a plurality of light emitting elements connected in series and having different emission spectra, and a drive device for driving the plurality of light emitting elements.
  • the driving device is provided corresponding to each light emitting element, and includes a supply current adjusting circuit for adjusting an amount of current supplied to the corresponding light emitting element, and two adjacent light emitting elements among the plurality of light emitting elements.
  • a discharge current adjusting circuit for adjusting the amount of current discharged from the upstream light emitting element connected to the connection node of the two light emitting elements through the connection node, provided corresponding to each of the connection nodes in between; including.
  • the amount of current discharged by the discharge current adjustment circuit is set to the same value as the amount of current supplied from the supply current adjustment circuit provided for the corresponding light emitting element.
  • the amount of current flowing through each light emitting element can be easily adjusted independently.
  • FIG. 1 is a schematic block diagram illustrating a configuration of lighting apparatus 1 according to the present embodiment.
  • lighting device 1 includes lighting panel 2, lighting unit 4 including a light emitting element, and controller 6 that controls lighting device 1 as a whole.
  • the illumination panel 2 irradiates the light emitted from the light emitting element of the illumination unit 4 as uniform light. In addition, you may make it irradiate a specific spot area
  • the illumination unit 4 includes a plurality of light emitting elements each having a different emission spectrum.
  • a case where three types of light emitting elements are provided will be described as an example. Specifically, a light-emitting element having a light emission spectrum of red (Red), green (Green), and blue (Blue) is provided. In this example, three types of light emitting elements will be described.
  • the present invention is not limited to this, and any configuration may be adopted as long as a plurality (two or more) are connected in series. Further, a structure in which a light-emitting element is provided can be employed.
  • examples of light-emitting elements constituting these include organic EL (also referred to as OLED: Organic Light Emitting Diode, or Organic Electroluminescence). Alternatively, a light emitting diode (LED) may be used.
  • the illumination device 1 may further include other light emitting elements in addition to these.
  • the controller 6 instructs the illumination unit 4 to perform light emission control. Specifically, a control signal for adjusting the luminance of the illumination unit 4 is output to the illumination unit 4 in accordance with an instruction from the outside (instruction for luminance adjustment).
  • FIG. 2 is a schematic configuration diagram of light emitting element group 15 of illumination unit 4 according to the present embodiment.
  • the case where organic EL is used as a light emitting element is shown as an example.
  • a red light emitting element (red light emitting layer) 10 a green light emitting element (green light emitting layer) 12, and a blue light emitting element (blue light emitting layer) 14 are laminated, and the light emitting layer of each color light emitting element is an electrode 15A, It is clamped by 15B, 15C, and 15D, respectively.
  • each color light emitting layer emits light.
  • the drive unit 16 drives the current supplied to the electrodes 15A, 15B, 15C, and 15D according to the control from the controller 6, thereby adjusting the luminance balance of the light emitting elements of each color and emitting light from the lighting device 1.
  • the dimming and toning of light can be controlled.
  • FIG. 3 is a diagram illustrating a specific configuration of illumination unit 4 according to the present embodiment.
  • the illumination unit 4 includes a light emitting element group 15 and a drive unit 16.
  • the light emitting element group 15 includes a plurality of light emitting elements connected in series as described above.
  • the organic ELs 10, 12, and 14 connected in series with different emission spectra will be described.
  • the organic EL may be a single element or a string configuration in which a plurality of elements are connected.
  • the organic EL 10 is provided between the node N0 and the node N1.
  • the organic EL 12 is provided between the node N1 and the node N2.
  • the organic EL 14 is provided between the node N3 and the ground voltage GND.
  • a supply current adjustment circuit 20A is provided between the power supply voltage VDD and the node N0 for the organic EL 10.
  • a supply current adjustment circuit 20B is provided between the power supply voltage VDD and the node N1 in parallel with the supply current adjustment circuit 20A for the organic EL 12.
  • a supply current adjustment circuit 20C is provided between the power supply voltage VDD and the node N2 in parallel with the supply current adjustment circuit 20B for the organic EL 14.
  • a discharge current adjusting circuit 30A is provided corresponding to the node N1 and for discharging a current flowing through the organic EL 10 between the node N1 and the ground voltage GND.
  • a discharge current adjusting circuit 30B is provided corresponding to the node N2 and for discharging a current flowing through the organic EL 12 between the node N2 and the ground voltage GND.
  • the voltage level setting unit 8 generates and outputs the reference voltages V1 to V3 for defining the current flowing through each of the organic ELs 10, 12, and 14 in accordance with instructions from the controller 6.
  • the driving unit 16 includes a voltage level setting unit 8 and sets a reference voltage according to a control signal from the controller 6.
  • the controller 6 in this example instructs the voltage level setting unit 8 to set a reference voltage associated with the luminance as a control signal for adjusting the luminance of each organic EL.
  • the supply current adjustment circuit 20A is a circuit that supplies a predetermined constant current I1 corresponding to the reference voltage V1 to the node N0.
  • the supply current adjustment circuit 20A includes a resistance element 22A, a transistor 24A, an amplifier 26A, and a comparator 28A.
  • Resistance element 22A and transistor 24A are connected in series between power supply voltage VDD and node N0. Then, the amplifier 26A measures the voltage (potential difference) across the resistance element 22A based on the current value passing through the resistance element 22A, amplifies it, and outputs it to the comparator 28A.
  • the comparator 28A compares the voltage output from the amplifier 26A with the reference voltage V1 for defining the amount of current to pass, and outputs a control voltage based on the comparison result to the gate of the transistor 24A.
  • the voltage level setting unit 8 generates a reference voltage that is set according to the target current value, and outputs the reference voltage to the comparator 28A.
  • the comparator 28A compares the voltage output from the amplifier 26A with the reference voltage V1, and raises the voltage level of the control voltage if the reference voltage V1 is greater than the voltage output from the amplifier 26A. As a result, the current passing through the transistor 24A increases, and the process is repeated until the output of the amplifier 26A increases and becomes the same value as the reference voltage V1.
  • the reference voltage V1 is smaller than the voltage output from the amplifier 26A, the voltage level of the control voltage is lowered. As a result, the current passing through the transistor 24A decreases, and the process is repeated until the output of the amplifier 26A decreases and becomes the same value as the reference voltage V1.
  • the discharge current adjusting circuit 30A is provided for the organic EL 10, and discharges (pulls out) a predetermined constant current I1 corresponding to the reference voltage V1 from a node N1 (connection node) between the organic EL 10 and the organic EL 12. ) Circuit.
  • the discharge current adjustment circuit 30A includes a resistance element 32A, a transistor 34A, an amplifier 36A, and a comparator 38A.
  • Resistance element 32A and transistor 34A are connected in series between node N1 and ground voltage GND.
  • the amplifier 36A measures the voltage (potential difference) across the resistance element 32A based on the current value passing through the resistance element 32A, amplifies it, and outputs it to the comparator 38A.
  • the comparator 38A compares the voltage output from the amplifier 36A with the reference voltage V1 for defining the amount of current to pass, and outputs a control voltage based on the comparison result to the gate of the transistor 34A.
  • the voltage level setting unit 8 generates a reference voltage V1 that is set according to the target current value, and outputs the reference voltage V1 to the comparator 38A.
  • the comparator 38A compares the voltage output from the amplifier 36A with the reference voltage V1, and if the reference voltage V1 is greater than the voltage output from the amplifier 36A, the comparator 38A increases the voltage level of the control voltage. As a result, the current passing through the transistor 34A increases, and the process is repeated until the output of the amplifier 36A increases and becomes the same value as the reference voltage V1.
  • the reference voltage V1 is smaller than the voltage output from the amplifier 36A, the voltage level of the control voltage is lowered. As a result, the current passing through the transistor 34A decreases, the output of the amplifier 36A decreases, and this process is repeated until it reaches the same value as the reference voltage V1.
  • the circuit can discharge a target current corresponding to the reference voltage V1. Since the other discharge current adjusting circuits have the same configuration, detailed description thereof will not be repeated.
  • the supply current adjustment circuit 20A is provided to the organic EL 10 and the current amount I1 is supplied according to the reference voltage V1. Further, a discharge current adjustment circuit 30A is provided for the organic EL 10, and the current amount I1 is discharged according to the reference voltage V1.
  • a supply current adjusting circuit 20B is provided for the organic EL 12, and the current amount I2 is supplied according to the reference voltage V2.
  • a discharge current adjusting circuit 30B is provided for the organic EL 12, and the current amount I2 is discharged through the node N2 between the organic EL 12 and the organic EL 14 according to the reference voltage V2.
  • a supply current adjusting circuit 20C is provided for the organic EL 14, and the current amount I3 is supplied according to the reference voltage V3.
  • the supplied current amount I3 flows directly to the ground side and does not flow to other organic ELs. Therefore, it is not necessary to provide a discharge current adjusting circuit for the organic EL 14.
  • upstream light emitting elements that are electrically connected directly to downstream light emitting elements such as organic ELs 12 and 14 (two light emitting elements that are directly connected in this way
  • a current supplied from a supply current adjusting circuit provided for the light emitting element) is discharged by the discharge current adjusting circuit via a connection node between two adjacent light emitting elements.
  • current supplied from a supply current adjusting circuit provided for a light emitting element to which no light emitting element is connected downstream flows into the ground side. Therefore, the current flowing out from the upstream light emitting element does not flow into the downstream light emitting element. Therefore, it is possible to independently control the amount of current flowing to each light emitting element.
  • the voltage level setting unit 8 may set the reference voltage input to the supply current adjustment circuit 20A and the discharge current adjustment circuit 30A to the reference voltage V1 in order to set the current amount I1 for the organic EL 10. .
  • the voltage level setting unit 8 may set the reference voltage input to the supply current adjustment circuit 20B and the discharge current adjustment circuit 30B to the reference voltage V2 in order to set the current amount I2 for the organic EL 12.
  • the voltage level setting unit 8 may set the reference voltage input to the supply current adjusting circuit 30C to the reference voltage V3 in order to set the current amount I3 for the organic EL 14.
  • each light emitting element is set by setting a reference voltage output to a supply current adjusting circuit and a discharge current adjusting circuit provided for each light emitting element.
  • the current flowing through each can be adjusted independently. Specifically, out of two adjacent light emitting elements, the current supplied to the upstream light emitting element through the supply current adjusting circuit is all discharged from the connection node between the downstream light emitting elements. The current is discharged through the adjusting circuit, and a current is newly supplied to the downstream light emitting element through the supply current adjusting circuit based on the reference voltage set for the downstream light emitting element.
  • the reference voltage output to the supply current adjustment circuit 20A and the discharge current adjustment circuit 30A may be adjusted to be set to different voltage values and adjusted to a desired current amount. The same applies to other reference voltages.
  • the supply current adjustment circuit and the discharge current adjustment circuit have been described using the configuration of the constant current source circuit, but it is naturally possible to use the configuration of the constant voltage source circuit.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un dispositif d'éclairage comportant plusieurs éléments électroluminescents connectés en série et qui ont des spectres d'émission mutuellement différents, et un dispositif de pilotage permettant de piloter les plusieurs éléments électroluminescents. Selon l'invention, le dispositif de pilotage comprend : un circuit de réglage de courant d'alimentation, prévu en correspondance avec chaque élément électroluminescent, servant à régler la quantité de courant appliquée à l'élément électroluminescent correspondant ; et un circuit de réglage de courant de décharge, prévu en correspondance avec chaque nœud de connexion connecté entre deux éléments électroluminescents adjacents parmi les plusieurs éléments électroluminescents, qui règle la quantité de courant déchargée, à travers le nœud de connexion, depuis l'élément électroluminescent en amont qui est connecté au nœud de connexion des deux éléments électroluminescents. La quantité de courant déchargée par le circuit de réglage de courant de décharge est fixée à la même valeur que la quantité de courant appliquée par le circuit de réglage de courant d'alimentation prévu pour un élément électroluminescent correspondant.
PCT/JP2013/082839 2012-12-18 2013-12-06 Dispositif d'éclairage Ceased WO2014097904A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014553076A JPWO2014097904A1 (ja) 2012-12-18 2013-12-06 照明装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-275843 2012-12-18
JP2012275843 2012-12-18

Publications (1)

Publication Number Publication Date
WO2014097904A1 true WO2014097904A1 (fr) 2014-06-26

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PCT/JP2013/082839 Ceased WO2014097904A1 (fr) 2012-12-18 2013-12-06 Dispositif d'éclairage

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JP (1) JPWO2014097904A1 (fr)
WO (1) WO2014097904A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019117806A (ja) * 2019-04-24 2019-07-18 パイオニア株式会社 発光装置
WO2025156248A1 (fr) * 2024-01-26 2025-07-31 京东方科技集团股份有限公司 Dispositif électroluminescent, écran d'affichage et appareil d'affichage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007165001A (ja) * 2005-12-09 2007-06-28 Nec Lighting Ltd Ｌｅｄ点灯装置
JP2008130989A (ja) * 2006-11-24 2008-06-05 Matsushita Electric Works Ltd Ｌｅｄ点灯回路およびそれを用いる照明器具
JP2009289940A (ja) * 2008-05-29 2009-12-10 Mitsubishi Electric Corp 発光装置及び照明装置
JP2011222123A (ja) * 2010-04-02 2011-11-04 Sharp Corp 照明装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010021063A (ja) * 2008-07-11 2010-01-28 Canon Inc 有機ｅｌ表示装置
KR100995793B1 (ko) * 2010-08-20 2010-11-22 김남규 발광 다이오드 어레이 구동회로

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007165001A (ja) * 2005-12-09 2007-06-28 Nec Lighting Ltd Ｌｅｄ点灯装置
JP2008130989A (ja) * 2006-11-24 2008-06-05 Matsushita Electric Works Ltd Ｌｅｄ点灯回路およびそれを用いる照明器具
JP2009289940A (ja) * 2008-05-29 2009-12-10 Mitsubishi Electric Corp 発光装置及び照明装置
JP2011222123A (ja) * 2010-04-02 2011-11-04 Sharp Corp 照明装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019117806A (ja) * 2019-04-24 2019-07-18 パイオニア株式会社 発光装置
WO2025156248A1 (fr) * 2024-01-26 2025-07-31 京东方科技集团股份有限公司 Dispositif électroluminescent, écran d'affichage et appareil d'affichage

Also Published As

Publication number Publication date
JPWO2014097904A1 (ja) 2017-01-12

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