WO2014097400A1 - Light emitting apparatus - Google Patents

Light emitting apparatus Download PDF

Info

Publication number
WO2014097400A1
WO2014097400A1 PCT/JP2012/082820 JP2012082820W WO2014097400A1 WO 2014097400 A1 WO2014097400 A1 WO 2014097400A1 JP 2012082820 W JP2012082820 W JP 2012082820W WO 2014097400 A1 WO2014097400 A1 WO 2014097400A1
Authority
WO
WIPO (PCT)
Prior art keywords
light emitting
unit
emitting device
light
control unit
Prior art date
Application number
PCT/JP2012/082820
Other languages
French (fr)
Japanese (ja)
Inventor
大志 辻
Original Assignee
パイオニア株式会社
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 パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2012/082820 priority Critical patent/WO2014097400A1/en
Publication of WO2014097400A1 publication Critical patent/WO2014097400A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/048—Preventing or counteracting the effects of ageing using evaluation of the usage time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Definitions

  • the present invention relates to a light emitting device.
  • Some light-emitting devices use organic EL (Organic Electroluminescence) or LED (Light Emitting Diode). There are various methods for controlling the light emission of such a light emitting device.
  • organic EL Organic Electroluminescence
  • LED Light Emitting Diode
  • Patent Literature 1 describes that in a lighting device, a first mode that changes both the light emission amount and the color temperature and a second mode that changes the light emission amount while keeping the color temperature constant are described. Specifically, in the first mode, the drive voltage is controlled, and in the second mode, the duty ratio when the drive voltage is supplied to the light emitting element in pulses is controlled.
  • the light emission amount of the light emitting device under the same conditions decreases as the cumulative driving time becomes longer. Therefore, the present inventor studied to prevent the user of the light emitting device from feeling that the light emitting device became dark.
  • An example of a problem to be solved by the present invention is to prevent the user from feeling that the light emitting device has become dark even when the cumulative driving time of the light emitting device is increased.
  • the invention according to claim 1 is a light emitting unit including at least one light emitting element; A control unit for controlling the light emitting unit; With The control unit acquires degradation information having a correlation with the degradation degree of the light emitting element, and controls the current density supplied to the light emitting unit based on the degradation information, thereby specifying the brightness of the light emitting unit.
  • This is a light emitting device that emits light.
  • FIG. 2 is a block diagram illustrating a functional configuration of a light emitting device according to Example 1.
  • FIG. It is a figure which shows an example of the data which the control data holding part has memorize
  • 6 is a block diagram illustrating a functional configuration of a light emitting device according to Example 2.
  • FIG. It is a figure which shows an example of the data which the control data holding part has memorize
  • 6 is a block diagram showing a functional configuration of a light emitting device according to Example 3.
  • 6 is a cross-sectional view illustrating a configuration of a light emitting element included in a light emitting unit of a light emitting device according to Example 4.
  • each component of each device indicates a functional unit block, not a hardware unit configuration.
  • Each component of each device includes a CPU, memory, a program that realizes the components shown in the figure loaded in the memory, a storage medium such as a hard disk for storing the program, and a network connection interface. It is realized by any combination of software and software. There are various modifications of the implementation method and apparatus.
  • FIG. 1 is a block diagram showing a functional configuration of a light emitting device 10 according to the embodiment.
  • the light emitting device 10 includes a light emitting unit 110 and a control unit 120.
  • the light emitting unit 110 includes at least one light emitting element.
  • the light emitting element is, for example, an organic EL or LED.
  • the control unit 120 controls the light emitting unit 110. Specifically, the control unit 120 acquires deterioration information. The deterioration information has a correlation with the degree of deterioration of the light emitting element included in the light emitting unit 110. Then, the control unit 120 specifies the light emitting unit 110 by controlling the current density supplied to the light emitting unit 110 based on the acquired deterioration information (for example, increasing the current density when it is determined that the deterioration is progressing). The light is emitted with the specified brightness.
  • the control unit 120 controls the current density supplied to the light emitting unit 110 based on the deterioration information. For this reason, even if the cumulative driving time of the light emitting unit 110 becomes longer, it is possible to prevent the user from feeling that the light emitting unit 110 has become dark.
  • FIG. 2 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the first embodiment.
  • the light emitting device 10 includes a light emitting unit 110, a control unit 120, a control data holding unit 125, and a voltage measurement unit 130.
  • the deterioration information is a voltage applied to the light emitting element of the light emitting unit 110 when the current density is set to a predetermined value.
  • the voltage measurement unit 130 measures this voltage and outputs the measurement result to the control unit 120.
  • the degree of deterioration of the light emitting element can be estimated from the measured value of the voltage measuring unit 130.
  • the control data holding unit 125 stores data used when the control unit 120 controls the current density. Specifically, the control data holding unit 125 stores the voltage measured by the voltage measurement unit 130 and the current density corresponding to the voltage in association with each other.
  • FIG. 3 is a diagram illustrating an example of data stored in the control data holding unit 125.
  • the control data holding unit 125 stores data in a table format. Specifically, the control data holding unit 125 stores the difference (voltage increase amount) between the voltage measured by the voltage measurement unit 130 and the reference voltage in association with the current density corresponding to the difference.
  • the control data holding unit 125 may store a function for converting the voltage measured by the voltage measuring unit 130 into a current density supplied to the light emitting element.
  • the control unit 120 of the light emitting device 10 drives the light emitting elements of the light emitting unit 110 at a predetermined current density.
  • the voltage measurement unit 130 measures the voltage at that time and outputs the voltage to the control unit 120.
  • the control unit 120 determines the current density to be supplied to the light emitting element of the light emitting unit 110 using the voltage output from the voltage measuring unit 130 and the data stored in the control data holding unit 125.
  • the light emitting unit 110 causes the light emitting element of the light emitting unit 110 to emit light at the determined current density.
  • the above-described deterioration information measurement mode may be performed periodically, or may be performed when there is an input from the user of the light emitting device 10.
  • the brightness of the light emitting device 10 may be controlled in a plurality of stages. In this case, the above-described operation may be performed for each brightness.
  • the voltage measuring unit 130 measures the voltage applied to the light emitting element of the light emitting unit 110 when the current density is set to a predetermined value. And the control part 120 will also raise the current density of the light emitting element of the light emission part 110, if the measurement result of the voltage measurement part 130 rises. For this reason, even if the cumulative driving time of the light emitting unit 110 becomes longer and the light emitting element deteriorates, it is possible to prevent the user from feeling that the light emitting unit 110 has become dark.
  • FIG. 4 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the second embodiment.
  • the light emitting device 10 according to the present example has the same configuration as that of the light emitting device 10 according to Example 1 except for the following points.
  • the light emitting device 10 uses the accumulated light emission time of the light emitting element included in the light emitting unit 110 as deterioration information. For this reason, the light emitting device 10 includes a time accumulating unit 132 instead of the voltage measuring unit 130.
  • the time accumulating unit 132 measures the accumulated light emission time of the light emitting element included in the light emitting unit 110. The measurement result of the time accumulating unit 132 is output to the control unit 120.
  • FIG. 5 is a diagram illustrating an example of data stored in the control data holding unit 125 in the present embodiment.
  • the control data holding unit 125 stores data in a table format. Specifically, the control data holding unit 125 stores the accumulated light emission time measured by the time accumulation unit 132 in association with the current density.
  • the control data holding unit 125 may store a function for converting the accumulated light emission time measured by the time accumulation unit 132 into a current density supplied to the light emitting element.
  • FIG. 6 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the third embodiment.
  • the light emitting device 10 according to this example has the same configuration as the light emitting device 10 according to Example 1 or 2 except for the following points.
  • FIG. 6 shows the same case as in the first embodiment.
  • the control unit 120 has a PWM (pulse width modulation) control unit 123. That is, the control unit 120 supplies current to the light emitting element included in the light emitting unit 110 in a pulse shape.
  • the PWM control unit 123 controls the duty ratio so that the average value of the current density supplied to the light emitting elements of the light emitting unit 110 is constant regardless of the deterioration information.
  • the control unit 120 includes a power supply unit 121, a current control unit 122, and a PWM control unit 123.
  • the power supply unit 121 supplies power to the light emitting unit 110.
  • the current control unit 122 connects the power supply unit 121 to the light emitting unit 110 and controls the current density supplied from the power supply unit 121 to the light emitting unit 110.
  • the PWM control unit 123 changes the timing at which the current control unit 122 supplies current to the light emitting unit 110 in a pulse shape. That is, the control unit 120 controls the current density by the current control unit 122, and controls the timing at which the current having the density controlled by the current control unit 122 is supplied by the PWM control unit 123. As a result, the time average value of the current density shared from the current control unit 122 is constant.
  • an AC-DC converter is provided between the power supply unit 121 and the current control unit 122.
  • FIG. 7 is a diagram illustrating an example of data stored in the control data holding unit 125 according to the present embodiment.
  • the control data holding unit 125 stores the voltage difference in association with the duty ratio in addition to the data shown in FIG.
  • the control data holding unit 125 may store a function for converting the voltage difference into a current density supplied to the light emitting element and a function for converting the voltage difference into a duty ratio.
  • the control data holding unit 125 associates the accumulated light emitting time with the duty ratio in addition to the data illustrated in FIG. I remember it.
  • the control data holding unit 125 may store a function for converting the accumulated light emission time into a current density supplied to the light emitting element and a function for converting the accumulated light emission time into a duty ratio.
  • the same effects as those in Embodiments 1 and 2 can be obtained. Further, the time average value of the current density shared from the current control unit 122 is constant regardless of the deterioration information. For this reason, the load to the light emitting element which the light emission part 110 has becomes small, and it can suppress that deterioration of a light emitting element becomes quick. This effect is particularly great when the light emitting element is an organic EL.
  • FIG. 8 is a cross-sectional view illustrating a configuration of a light emitting element included in the light emitting unit 110 of the light emitting device 10 according to the fourth embodiment.
  • the light emitting device 10 according to the present example has the same configuration as that of any of the light emitting devices 10 according to Examples 1 to 3, except for the configuration of the light emitting element.
  • the light emitting element of the light emitting unit 110 includes a translucent substrate 111, a first electrode 112, an organic functional layer 140, and a second electrode 115.
  • the first electrode 112 is formed on the first surface side of the translucent substrate 111 and has translucency.
  • the organic functional layer 140 is located on the opposite side to the translucent substrate 111 with the first electrode 112 interposed therebetween.
  • the organic functional layer 140 has a light emitting layer.
  • the second electrode 115 is located on the side opposite to the first electrode 112 with the organic functional layer 140 interposed therebetween. In this embodiment, the light emitted from the organic functional layer 140 is extracted from the translucent substrate 111 side.
  • the organic functional layer 140 has a configuration in which a hole injection layer 142, a hole transport layer 144, a light emitting layer 146, and an electron injection layer 148 are stacked on the first electrode 112 in this order. Note that an electron-transport layer may be provided between the light-emitting layer 146 and the electron-injection layer 148.
  • the stacked structure of the hole injection layer 142, the hole transport layer 144, the light emitting layer 146, the electron injection layer 148, and the second electrode 115 is divided into a plurality of regions. Specifically, these stacked structures extend in parallel to each other in a direction perpendicular to the paper surface. Adjacent stacked structures are separated from each other by a partition wall 114.
  • the partition 114 is, for example, a photosensitive resin such as polyimide, and is formed in a desired pattern by being exposed and developed.
  • the partition 114 may be a resin other than polyimide, such as an epoxy resin or an acrylic resin.
  • the adjacent light emitting layers 146 have different emission spectra, for example, different maximum peak wavelengths. Specifically, as the light-emitting layer 146, a layer that emits red light, a layer that emits green light, and a layer that emits blue light are repeatedly arranged. For this reason, the light emitting device 10 includes a linear region that emits red light, a linear region that emits green light, and a linear region that emits blue light in a plan view. become.
  • the first electrode 112 is formed as an electrode common to the plurality of light emitting layers 146.
  • An auxiliary electrode 113 is formed on a portion of the first electrode 112 covered with the partition wall 114.
  • the auxiliary electrode 113 is formed using, for example, Ag or Al, and has a resistance lower than that of the first electrode 112.
  • the auxiliary electrode 113 functions as an auxiliary electrode for reducing the apparent resistance of the first electrode 112.
  • the light-emitting layer 146 may be configured to emit light in a single emission color such as white by mixing materials for emitting a plurality of colors, or may have different emission spectra.
  • a plurality of layers (for example, a layer emitting red light, a layer emitting green light, and a layer emitting blue light) may be stacked.
  • the structure of the light-emitting element included in the light-emitting portion 110 is not limited to the structure shown in Embodiment 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

A light emitting apparatus (10) has a light emitting unit (110) and a control unit (120). The light emitting unit (110) includes at least one light emitting element. The light emitting element is, for instance, an organic EL or an LED. The control unit (120) controls the light emitting unit (110). Specifically, the control unit (120) acquires deterioration information. The deterioration information has correlativity with a deterioration degree of the light emitting element of the light emitting unit (110). On the basis of the deterioration information thus acquired, the control unit (120) makes the light emitting unit (110) emit light with specified luminance by controlling the density of a current to be supplied to the light emitting unit (110).

Description

発光装置Light emitting device
　本発明は、発光装置に関する。 The present invention relates to a light emitting device.
　発光装置の一つに、有機ＥＬ（Organic Electroluminescence）やＬＥＤ（Light Emitting Diode）を用いるものがある。このような発光装置の発光を制御する方法としては、様々なものがある。 Some light-emitting devices use organic EL (Organic Electroluminescence) or LED (Light Emitting Diode). There are various methods for controlling the light emission of such a light emitting device.
　例えば特許文献１には、照明装置において、発光量と色温度の双方を変化させる第１モードと、色温度を一定に保ちつつ発光量を変化させる第２モードとを使い分けることが記載されている。具体的には、第１モードでは、駆動電圧を制御し、第２モードでは駆動電圧を発光素子にパルスで供給するときのデューティ比を制御する。 For example, Patent Literature 1 describes that in a lighting device, a first mode that changes both the light emission amount and the color temperature and a second mode that changes the light emission amount while keeping the color temperature constant are described. . Specifically, in the first mode, the drive voltage is controlled, and in the second mode, the duty ratio when the drive voltage is supplied to the light emitting element in pulses is controlled.
特開２０１１－１１３７３８号公報JP 2011-1113738 A
　同じ条件における発光装置の発光量は、累積駆動時間が長くなるにつれて低下する。そこで本発明者は、発光装置の使用者に、その発光装置が暗くなったと感じさせないようにすることを検討した。 The light emission amount of the light emitting device under the same conditions decreases as the cumulative driving time becomes longer. Therefore, the present inventor studied to prevent the user of the light emitting device from feeling that the light emitting device became dark.
　本発明が解決しようとする課題としては、発光装置の累積駆動時間が長くなっても、その発光装置が暗くなったと使用者が感じないようにすることが一例として挙げられる。 An example of a problem to be solved by the present invention is to prevent the user from feeling that the light emitting device has become dark even when the cumulative driving time of the light emitting device is increased.
　請求項１に記載の発明は、少なくとも一つの発光素子を含む発光部と、
　前記発光部を制御する制御部と、
を備え、
　前記制御部は、前記発光素子の劣化度合いに相関性を有する劣化情報を取得し、前記劣化情報に基づいて前記発光部に供給する電流密度を制御することにより、前記発光部を指定された明るさで発光させる発光装置である。 The invention according to claim 1 is a light emitting unit including at least one light emitting element;
A control unit for controlling the light emitting unit;
With
The control unit acquires degradation information having a correlation with the degradation degree of the light emitting element, and controls the current density supplied to the light emitting unit based on the degradation information, thereby specifying the brightness of the light emitting unit. This is a light emitting device that emits light.
　上述した目的、およびその他の目的、特徴および利点は、以下に述べる好適な実施の形態、およびそれに付随する以下の図面によってさらに明らかになる。 The above-described object and other objects, features, and advantages will be further clarified by a preferred embodiment described below and the following drawings attached thereto.
実施形態に係る発光装置の機能構成を示すブロック図である。It is a block diagram which shows the function structure of the light-emitting device which concerns on embodiment. 実施例１に係る発光装置の機能構成を示すブロック図である。2 is a block diagram illustrating a functional configuration of a light emitting device according to Example 1. FIG. 制御データ保持部が記憶しているデータの一例を示す図である。It is a figure which shows an example of the data which the control data holding part has memorize | stored. 実施例２に係る発光装置の機能構成を示すブロック図である。6 is a block diagram illustrating a functional configuration of a light emitting device according to Example 2. FIG. 制御データ保持部が記憶しているデータの一例を示す図である。It is a figure which shows an example of the data which the control data holding part has memorize | stored. 実施例３に係る発光装置の機能構成を示すブロック図である。6 is a block diagram showing a functional configuration of a light emitting device according to Example 3. FIG. 制御データ保持部が記憶しているデータの一例を示す図である。It is a figure which shows an example of the data which the control data holding part has memorize | stored. 実施例４に係る発光装置の発光部が有する発光素子の構成を示す断面図である。6 is a cross-sectional view illustrating a configuration of a light emitting element included in a light emitting unit of a light emitting device according to Example 4.
　以下、本発明の実施の形態について、図面を用いて説明する。尚、すべての図面において、同様な構成要素には同様の符号を付し、適宜説明を省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.
　なお、以下に示す説明において、各装置の各構成要素は、ハードウエア単位の構成ではなく、機能単位のブロックを示している。各装置の各構成要素は、任意のコンピュータのＣＰＵ、メモリ、メモリにロードされた本図の構成要素を実現するプログラム、そのプログラムを格納するハードディスクなどの記憶メディア、ネットワーク接続用インタフェースを中心にハードウエアとソフトウエアの任意の組合せによって実現される。そして、その実現方法、装置には様々な変形例がある。 In the following description, each component of each device indicates a functional unit block, not a hardware unit configuration. Each component of each device includes a CPU, memory, a program that realizes the components shown in the figure loaded in the memory, a storage medium such as a hard disk for storing the program, and a network connection interface. It is realized by any combination of software and software. There are various modifications of the implementation method and apparatus.
　図１は、実施形態に係る発光装置１０の機能構成を示すブロック図である。発光装置１０は、発光部１１０及び制御部１２０を有している。発光部１１０は、少なくとも一つの発光素子を含む。発光素子は、例えば有機ＥＬ又はＬＥＤである。 FIG. 1 is a block diagram showing a functional configuration of a light emitting device 10 according to the embodiment. The light emitting device 10 includes a light emitting unit 110 and a control unit 120. The light emitting unit 110 includes at least one light emitting element. The light emitting element is, for example, an organic EL or LED.
　制御部１２０は発光部１１０を制御する。具体的には、制御部１２０は劣化情報を取得する。劣化情報は、発光部１１０が有する発光素子の劣化度合いに相関性を有している。そして制御部１２０は、取得した劣化情報に基づいて、発光部１１０に供給する電流密度を制御する（例えば劣化が進んでいると判断されると電流密度を増やす）ことにより、発光部１１０を指定された明るさで発光させる。 The control unit 120 controls the light emitting unit 110. Specifically, the control unit 120 acquires deterioration information. The deterioration information has a correlation with the degree of deterioration of the light emitting element included in the light emitting unit 110. Then, the control unit 120 specifies the light emitting unit 110 by controlling the current density supplied to the light emitting unit 110 based on the acquired deterioration information (for example, increasing the current density when it is determined that the deterioration is progressing). The light is emitted with the specified brightness.
　本実施形態によれば、制御部１２０は、劣化情報に基づいて、発光部１１０に供給する電流密度を制御する。このため、発光部１１０の累積駆動時間が長くなっても、その発光部１１０が暗くなったと使用者が感じないようにすることができる。 According to the present embodiment, the control unit 120 controls the current density supplied to the light emitting unit 110 based on the deterioration information. For this reason, even if the cumulative driving time of the light emitting unit 110 becomes longer, it is possible to prevent the user from feeling that the light emitting unit 110 has become dark.
（実施例１）
　図２は、実施例１に係る発光装置１０の機能構成を示すブロック図である。この発光装置１０は、発光部１１０、制御部１２０、制御データ保持部１２５、及び電圧測定部１３０を備えている。本実施例において、劣化情報は、電流密度を予め定められた値にしたときに発光部１１０の発光素子に印加される電圧である。電圧測定部１３０は、この電圧を測定し、測定結果を制御部１２０に出力する。発光素子が劣化すると、発光素子の抵抗及びインピーダンスが上昇する。このため、電圧測定部１３０の測定値によって、発光素子の劣化度合いを推定することができる。 (Example 1)
FIG. 2 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the first embodiment. The light emitting device 10 includes a light emitting unit 110, a control unit 120, a control data holding unit 125, and a voltage measurement unit 130. In this embodiment, the deterioration information is a voltage applied to the light emitting element of the light emitting unit 110 when the current density is set to a predetermined value. The voltage measurement unit 130 measures this voltage and outputs the measurement result to the control unit 120. When the light emitting element deteriorates, the resistance and impedance of the light emitting element increase. For this reason, the degree of deterioration of the light emitting element can be estimated from the measured value of the voltage measuring unit 130.
　制御データ保持部１２５は、制御部１２０が電流密度を制御するときに用いるデータを記憶している。具体的には、制御データ保持部１２５は、電圧測定部１３０が測定した電圧と、その電圧に対応する電流密度とを互いに対応付けて記憶している。 The control data holding unit 125 stores data used when the control unit 120 controls the current density. Specifically, the control data holding unit 125 stores the voltage measured by the voltage measurement unit 130 and the current density corresponding to the voltage in association with each other.
　図３は、制御データ保持部１２５が記憶しているデータの一例を示す図である。本図に示す例において、制御データ保持部１２５はテーブル形式でデータを記憶している。具体的には、制御データ保持部１２５は、電圧測定部１３０が測定した電圧と基準電圧との差分（電圧上昇量）を、その差分に対応する電流密度に対応付けて記憶している。なお制御データ保持部１２５は、電圧測定部１３０が測定した電圧を発光素子に供給する電流密度に変換する関数を記憶していても良い。 FIG. 3 is a diagram illustrating an example of data stored in the control data holding unit 125. In the example shown in the figure, the control data holding unit 125 stores data in a table format. Specifically, the control data holding unit 125 stores the difference (voltage increase amount) between the voltage measured by the voltage measurement unit 130 and the reference voltage in association with the current density corresponding to the difference. The control data holding unit 125 may store a function for converting the voltage measured by the voltage measuring unit 130 into a current density supplied to the light emitting element.
　次に、本実施例における発光装置１０の動作を説明する。発光装置１０の制御部１２０は、劣化情報測定モードになると、発光部１１０の発光素子を、予め定められた電流密度で駆動する。電圧測定部１３０は、そのときの電圧を測定し、制御部１２０に出力する。制御部１２０は、電圧測定部１３０から出力された電圧、及び制御データ保持部１２５が記憶しているデータを用いて、発光部１１０の発光素子に供給すべき電流密度を決定する。そして発光部１１０は、決定した電流密度で発光部１１０の発光素子を発光させる。 Next, the operation of the light emitting device 10 in this embodiment will be described. In the deterioration information measurement mode, the control unit 120 of the light emitting device 10 drives the light emitting elements of the light emitting unit 110 at a predetermined current density. The voltage measurement unit 130 measures the voltage at that time and outputs the voltage to the control unit 120. The control unit 120 determines the current density to be supplied to the light emitting element of the light emitting unit 110 using the voltage output from the voltage measuring unit 130 and the data stored in the control data holding unit 125. The light emitting unit 110 causes the light emitting element of the light emitting unit 110 to emit light at the determined current density.
　なお、上記した劣化情報測定モードは、定期的に行われても良いし、発光装置１０のユーザからの入力があったときに行われても良い。 In addition, the above-described deterioration information measurement mode may be performed periodically, or may be performed when there is an input from the user of the light emitting device 10.
　また、発光装置１０の明るさは、複数段階で制御できる場合もある。この場合、上記した動作は、明るさ別に行われても良い。 Also, the brightness of the light emitting device 10 may be controlled in a plurality of stages. In this case, the above-described operation may be performed for each brightness.
　以上、本実施例によれば、電圧測定部１３０は、電流密度を予め定められた値にしたときに発光部１１０の発光素子に印加される電圧を測定する。そして制御部１２０は、電圧測定部１３０の測定結果が上昇すると、発光部１１０の発光素子の電流密度も上昇させる。このため、発光部１１０の累積駆動時間が長くなって発光素子が劣化しても、その発光部１１０が暗くなったと使用者が感じないようにすることができる。 As described above, according to the present embodiment, the voltage measuring unit 130 measures the voltage applied to the light emitting element of the light emitting unit 110 when the current density is set to a predetermined value. And the control part 120 will also raise the current density of the light emitting element of the light emission part 110, if the measurement result of the voltage measurement part 130 rises. For this reason, even if the cumulative driving time of the light emitting unit 110 becomes longer and the light emitting element deteriorates, it is possible to prevent the user from feeling that the light emitting unit 110 has become dark.
（実施例２）
　図４は、実施例２に係る発光装置１０の機能構成を示すブロック図である。本実施例に係る発光装置１０は、以下の点を除いて実施例１に係る発光装置１０と同様の構成である。 (Example 2)
FIG. 4 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the second embodiment. The light emitting device 10 according to the present example has the same configuration as that of the light emitting device 10 according to Example 1 except for the following points.
　まず発光装置１０は、劣化情報として、発光部１１０が有する発光素子の累積発光時間を用いる。このため、発光装置１０は、電圧測定部１３０の代わりに時間累積部１３２を有している。時間累積部１３２は、発光部１１０が有する発光素子の累積発光時間を測定する。そして時間累積部１３２の測定結果は制御部１２０に出力される。 First, the light emitting device 10 uses the accumulated light emission time of the light emitting element included in the light emitting unit 110 as deterioration information. For this reason, the light emitting device 10 includes a time accumulating unit 132 instead of the voltage measuring unit 130. The time accumulating unit 132 measures the accumulated light emission time of the light emitting element included in the light emitting unit 110. The measurement result of the time accumulating unit 132 is output to the control unit 120.
　図５は、本実施例において制御データ保持部１２５が記憶しているデータの一例を示す図である。本図に示す例において、制御データ保持部１２５はテーブル形式でデータを記憶している。具体的には、制御データ保持部１２５は、時間累積部１３２が測定した累積発光時間を電流密度に対応付けて記憶している。なお制御データ保持部１２５は、時間累積部１３２が測定した累積発光時間を発光素子に供給する電流密度に変換する関数を記憶していても良い。 FIG. 5 is a diagram illustrating an example of data stored in the control data holding unit 125 in the present embodiment. In the example shown in the figure, the control data holding unit 125 stores data in a table format. Specifically, the control data holding unit 125 stores the accumulated light emission time measured by the time accumulation unit 132 in association with the current density. The control data holding unit 125 may store a function for converting the accumulated light emission time measured by the time accumulation unit 132 into a current density supplied to the light emitting element.
　本実施例によっても、実施例１と同様の効果を得ることができる。 Also in this embodiment, the same effect as that in Embodiment 1 can be obtained.
（実施例３）
　図６は、実施例３に係る発光装置１０の機能構成を示すブロック図である。本実施例に係る発光装置１０は、以下の点を除いて、実施例１又は２に係る発光装置１０と同様の構成である。なお、図６は実施例１と同様の場合を図示している。 (Example 3)
FIG. 6 is a block diagram illustrating a functional configuration of the light emitting device 10 according to the third embodiment. The light emitting device 10 according to this example has the same configuration as the light emitting device 10 according to Example 1 or 2 except for the following points. FIG. 6 shows the same case as in the first embodiment.
　まず、制御部１２０はＰＷＭ（pulse width modulation）制御部１２３を有している。すなわち制御部１２０は、発光部１１０が有する発光素子に、電流をパルス状に供給する。そしてＰＷＭ制御部１２３は、発光部１１０の発光素子に供給する電流密度の平均値が劣化情報によらず一定になるように、デューティ比を制御する。 First, the control unit 120 has a PWM (pulse width modulation) control unit 123. That is, the control unit 120 supplies current to the light emitting element included in the light emitting unit 110 in a pulse shape. The PWM control unit 123 controls the duty ratio so that the average value of the current density supplied to the light emitting elements of the light emitting unit 110 is constant regardless of the deterioration information.
　詳細には、制御部１２０は、電源部１２１、電流制御部１２２、及びＰＷＭ制御部１２３を有している。電源部１２１は発光部１１０に電力を供給する。電流制御部１２２は、電源部１２１を発光部１１０に接続しており、電源部１２１から発光部１１０に供給される電流密度を制御する。ＰＷＭ制御部１２３は、電流制御部１２２が発光部１１０に電流を流すタイミングをパルス状にする。すなわち、制御部１２０は、電流制御部１２２によって電流密度を制御し、ＰＷＭ制御部１２３によって、電流制御部１２２が制御した密度を有する電流を流すタイミングを制御する。その結果、電流制御部１２２から共有される電流密度の時間平均値は、一定になる。 Specifically, the control unit 120 includes a power supply unit 121, a current control unit 122, and a PWM control unit 123. The power supply unit 121 supplies power to the light emitting unit 110. The current control unit 122 connects the power supply unit 121 to the light emitting unit 110 and controls the current density supplied from the power supply unit 121 to the light emitting unit 110. The PWM control unit 123 changes the timing at which the current control unit 122 supplies current to the light emitting unit 110 in a pulse shape. That is, the control unit 120 controls the current density by the current control unit 122, and controls the timing at which the current having the density controlled by the current control unit 122 is supplied by the PWM control unit 123. As a result, the time average value of the current density shared from the current control unit 122 is constant.
　なお、電源部１２１が供給する電力が交流電力である場合、電源部１２１と電流制御部１２２の間にはＡＣ－ＤＣコンバータが設けられる。 When the power supplied from the power supply unit 121 is AC power, an AC-DC converter is provided between the power supply unit 121 and the current control unit 122.
　図７は、本実施例に係る制御データ保持部１２５が記憶しているデータの一例を示す図である。本図に示す例において、制御データ保持部１２５は、図３に示したデータに加え、電圧の差をデューティ比に対応付けて記憶している。なお制御データ保持部１２５は、電圧の差を発光素子に供給する電流密度に変換する関数、及び電圧の差をデューティ比に変換する関数を記憶していてもよい。 FIG. 7 is a diagram illustrating an example of data stored in the control data holding unit 125 according to the present embodiment. In the example shown in this figure, the control data holding unit 125 stores the voltage difference in association with the duty ratio in addition to the data shown in FIG. Note that the control data holding unit 125 may store a function for converting the voltage difference into a current density supplied to the light emitting element and a function for converting the voltage difference into a duty ratio.
　なお、発光装置１０が電圧測定部１３０の代わりに時間累積部１３２を有している場合、制御データ保持部１２５は、図５に示したデータに加え、累積発光時間をデューティ比に対応付けて記憶している。この場合、制御データ保持部１２５は、累積発光時間を発光素子に供給する電流密度に変換する関数、及び累積発光時間をデューティ比に変換する関数を記憶していてもよい。 When the light emitting device 10 includes the time accumulating unit 132 instead of the voltage measuring unit 130, the control data holding unit 125 associates the accumulated light emitting time with the duty ratio in addition to the data illustrated in FIG. I remember it. In this case, the control data holding unit 125 may store a function for converting the accumulated light emission time into a current density supplied to the light emitting element and a function for converting the accumulated light emission time into a duty ratio.
　本実施例によっても、実施例１，２と同様の効果を得ることができる。また、電流制御部１２２から共有される電流密度の時間平均値は、劣化情報によらず一定になる。このため、発光部１１０が有する発光素子への負荷は小さくなり、発光素子の劣化が早くなることを抑制できる。この効果は、発光素子が有機ＥＬである場合に特に大きくなる。 Also in this embodiment, the same effects as those in Embodiments 1 and 2 can be obtained. Further, the time average value of the current density shared from the current control unit 122 is constant regardless of the deterioration information. For this reason, the load to the light emitting element which the light emission part 110 has becomes small, and it can suppress that deterioration of a light emitting element becomes quick. This effect is particularly great when the light emitting element is an organic EL.
（実施例４）
　図８は、実施例４に係る発光装置１０の発光部１１０が有する発光素子の構成を示す断面図である。本実施例に係る発光装置１０は、発光素子の構成を除いて、実施例１～３に係る発光装置１０のいずれかと同様の構成である。 Example 4
FIG. 8 is a cross-sectional view illustrating a configuration of a light emitting element included in the light emitting unit 110 of the light emitting device 10 according to the fourth embodiment. The light emitting device 10 according to the present example has the same configuration as that of any of the light emitting devices 10 according to Examples 1 to 3, except for the configuration of the light emitting element.
　本実施例において、発光部１１０の発光素子は、透光性基板１１１、第１電極１１２、有機機能層１４０、及び第２電極１１５を備えている。第１電極１１２は、透光性基板１１１の第１面側に形成され、透光性を有している。有機機能層１４０は、第１電極１１２を介して透光性基板１１１とは逆側に位置している。有機機能層１４０は発光層を有している。第２電極１１５は、有機機能層１４０を介して第１電極１１２とは逆側に位置している。本実施例において、有機機能層１４０で発光した光は、透光性基板１１１側から取り出される。 In this embodiment, the light emitting element of the light emitting unit 110 includes a translucent substrate 111, a first electrode 112, an organic functional layer 140, and a second electrode 115. The first electrode 112 is formed on the first surface side of the translucent substrate 111 and has translucency. The organic functional layer 140 is located on the opposite side to the translucent substrate 111 with the first electrode 112 interposed therebetween. The organic functional layer 140 has a light emitting layer. The second electrode 115 is located on the side opposite to the first electrode 112 with the organic functional layer 140 interposed therebetween. In this embodiment, the light emitted from the organic functional layer 140 is extracted from the translucent substrate 111 side.
　有機機能層１４０は、第１電極１１２の上に、正孔注入層１４２、正孔輸送層１４４、発光層１４６、及び電子注入層１４８をこの順に積層させた構成を有している。なお、発光層１４６と電子注入層１４８の間に電子輸送層を設けても良い。 The organic functional layer 140 has a configuration in which a hole injection layer 142, a hole transport layer 144, a light emitting layer 146, and an electron injection layer 148 are stacked on the first electrode 112 in this order. Note that an electron-transport layer may be provided between the light-emitting layer 146 and the electron-injection layer 148.
　また、正孔注入層１４２、正孔輸送層１４４、発光層１４６、電子注入層１４８、及び第２電極１１５の積層構造は、複数の領域に分割されている。詳細には、これらの積層構造は、紙面に対して垂直な方向に、互いに平行に延伸している。隣り合う積層構造は、隔壁１１４によって互いに分離されている。隔壁１１４は、例えばポリイミドなどの感光性の樹脂であり、露光及び現像されることによって、所望のパターンに形成されている。なお、隔壁１１４はポリイミド以外の樹脂、例えばエポキシ樹脂やアクリル樹脂であっても良い。 The stacked structure of the hole injection layer 142, the hole transport layer 144, the light emitting layer 146, the electron injection layer 148, and the second electrode 115 is divided into a plurality of regions. Specifically, these stacked structures extend in parallel to each other in a direction perpendicular to the paper surface. Adjacent stacked structures are separated from each other by a partition wall 114. The partition 114 is, for example, a photosensitive resin such as polyimide, and is formed in a desired pattern by being exposed and developed. The partition 114 may be a resin other than polyimide, such as an epoxy resin or an acrylic resin.
　そして、隣り合う発光層１４６は、互いに異なる発光スペクトル、例えば互いに異なる最大ピーク波長を有している。具体的には、発光層１４６としては、赤色の光を発光する層、緑色の光を発光する層、及び青色を発光する層が、繰り返し配置されている。このため、発光装置１０は、平面視で、赤色の光を発光する線状の領域、緑色の光を発光する線状の領域、及び青色を発光する線状の領域が繰り返し配置されていることになる。 The adjacent light emitting layers 146 have different emission spectra, for example, different maximum peak wavelengths. Specifically, as the light-emitting layer 146, a layer that emits red light, a layer that emits green light, and a layer that emits blue light are repeatedly arranged. For this reason, the light emitting device 10 includes a linear region that emits red light, a linear region that emits green light, and a linear region that emits blue light in a plan view. become.
　一方、第１電極１１２は複数の発光層１４６に共通の電極として形成されている。そして第１電極１１２のうち隔壁１１４で覆われている部分には、補助電極１１３が形成されている。補助電極１１３は、例えばＡｇ又はＡｌを用いて形成されており、第１電極１１２よりも抵抗が低い。補助電極１１３は、第１電極１１２の見かけ上の抵抗を下げるための補助電極として機能する。 On the other hand, the first electrode 112 is formed as an electrode common to the plurality of light emitting layers 146. An auxiliary electrode 113 is formed on a portion of the first electrode 112 covered with the partition wall 114. The auxiliary electrode 113 is formed using, for example, Ag or Al, and has a resistance lower than that of the first electrode 112. The auxiliary electrode 113 functions as an auxiliary electrode for reducing the apparent resistance of the first electrode 112.
　なお本実施例において、発光層１４６は、複数の色を発光するための材料を混ぜることにより、白色等の単一の発光色で発光するように構成されていても良いし、異なる発光スペクトルを有する層（例えば赤色を発光する層、緑色を発光する層、及び青色を発光する層）を複数積層させていてもよい。 Note that in this embodiment, the light-emitting layer 146 may be configured to emit light in a single emission color such as white by mixing materials for emitting a plurality of colors, or may have different emission spectra. A plurality of layers (for example, a layer emitting red light, a layer emitting green light, and a layer emitting blue light) may be stacked.
　本実施例によっても、実施例１～３と同様の効果を得ることができる。 Also in this embodiment, the same effects as in Embodiments 1 to 3 can be obtained.
　以上、図面を参照して実施形態及び実施例について述べたが、これらは本発明の例示であり、上記以外の様々な構成を採用することもできる。例えば発光部１１０が有する発光素子の構造は、実施例４に示した構造に限定されない。 As mentioned above, although embodiment and the Example were described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable. For example, the structure of the light-emitting element included in the light-emitting portion 110 is not limited to the structure shown in Embodiment 4.

Claims (6)

  1. 　少なくとも一つの発光素子を含む発光部と、
    　前記発光部を制御する制御部と、
    を備え、
    　前記制御部は、前記発光素子の劣化度合いに相関性を有する劣化情報を取得し、前記劣化情報に基づいて前記発光部に供給する電流密度を制御することにより、前記発光部を指定された明るさで発光させる発光装置。     A light emitting unit including at least one light emitting element;
    A control unit for controlling the light emitting unit;
    With
    The control unit acquires degradation information having a correlation with the degradation degree of the light emitting element, and controls the current density supplied to the light emitting unit based on the degradation information, thereby specifying the brightness of the light emitting unit. A light emitting device that emits light.
  2. 　請求項１に記載の発光装置において、
    　前記劣化情報は、前記電流密度を予め定められた値にしたときに前記発光素子に印加される電圧である発光装置。     The light-emitting device according to claim 1.
    The light emitting device, wherein the deterioration information is a voltage applied to the light emitting element when the current density is set to a predetermined value.
  3. 　請求項１に記載の発光装置において、
    　前記劣化情報は、前記発光素子の累積発光時間である発光装置。     The light-emitting device according to claim 1.
    The deterioration information is a light emitting device that is a cumulative light emission time of the light emitting element.
  4. 　請求項１～３のいずれか一項に記載の発光装置において、
    　前記制御部は、ＰＷＭ（pulse width modulation）制御によって電流をパルス状に前記発光素子に供給し、かつ、前記発光部に供給する電流密度の平均値が前記劣化情報によらず一定になるように、デューティ比を制御する発光装置。     The light emitting device according to any one of claims 1 to 3,
    The control unit supplies current to the light emitting element in a pulsed manner by PWM (pulse width modulation) control, and an average value of current density supplied to the light emitting unit is constant regardless of the deterioration information. , A light emitting device for controlling the duty ratio.
  5. 　請求項１～４のいずれか一項に記載の発光装置において、
    　前記発光素子は有機ＥＬである発光装置。     The light emitting device according to any one of claims 1 to 4,
    The light emitting device is an organic EL.
  6. 　請求項５に記載の発光装置において、
    　前記発光素子は互いに異なる発光スペクトルを有する複数の前記発光層を互いに積層した状態で有している発光装置。     The light emitting device according to claim 5.
    The light emitting device has a light emitting device in which a plurality of the light emitting layers having emission spectra different from each other are stacked.
PCT/JP2012/082820 2012-12-18 2012-12-18 Light emitting apparatus WO2014097400A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/082820 WO2014097400A1 (en) 2012-12-18 2012-12-18 Light emitting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/082820 WO2014097400A1 (en) 2012-12-18 2012-12-18 Light emitting apparatus

Publications (1)

Publication Number Publication Date
WO2014097400A1 true WO2014097400A1 (en) 2014-06-26

Family

ID=50977785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/082820 WO2014097400A1 (en) 2012-12-18 2012-12-18 Light emitting apparatus

Country Status (1)

Country Link
WO (1) WO2014097400A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002100471A (en) * 2000-09-22 2002-04-05 Sanyo Electric Co Ltd Driving method and driving device of organic electroluminescence element and display device using them
JP2003511746A (en) * 1999-10-12 2003-03-25 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ LED display
JP2005128272A (en) * 2003-10-24 2005-05-19 Pioneer Electronic Corp Image display device
WO2005106835A1 (en) * 2004-04-30 2005-11-10 Fuji Photo Film Co., Ltd. Organic electroluminescence device capable of regulating chromaticity
JP2007140325A (en) * 2005-11-22 2007-06-07 Seiko Epson Corp Light emission controller, display device, electronic apparatus, and method of controlling light emitting device
JP2011049015A (en) * 2009-08-26 2011-03-10 Panasonic Electric Works Co Ltd Organic el element illummination device, and light-emitting module and luminaire with the same
JP2012129050A (en) * 2010-12-15 2012-07-05 Konica Minolta Holdings Inc Light-emitting device, method for driving light-emitting element, and luminaire

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003511746A (en) * 1999-10-12 2003-03-25 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ LED display
JP2002100471A (en) * 2000-09-22 2002-04-05 Sanyo Electric Co Ltd Driving method and driving device of organic electroluminescence element and display device using them
JP2005128272A (en) * 2003-10-24 2005-05-19 Pioneer Electronic Corp Image display device
WO2005106835A1 (en) * 2004-04-30 2005-11-10 Fuji Photo Film Co., Ltd. Organic electroluminescence device capable of regulating chromaticity
JP2007140325A (en) * 2005-11-22 2007-06-07 Seiko Epson Corp Light emission controller, display device, electronic apparatus, and method of controlling light emitting device
JP2011049015A (en) * 2009-08-26 2011-03-10 Panasonic Electric Works Co Ltd Organic el element illummination device, and light-emitting module and luminaire with the same
JP2012129050A (en) * 2010-12-15 2012-07-05 Konica Minolta Holdings Inc Light-emitting device, method for driving light-emitting element, and luminaire

Similar Documents

Publication Publication Date Title
US20110095702A1 (en) Stacked organic light-emitting device
JP5535628B2 (en) Electroluminescent device with variable color point
US10460651B2 (en) Method for driving display
CN109346005B (en) Organic EL panel control device, light source device, organic EL panel control method, program, and recording medium
US20050258432A1 (en) Method for increasing optical output of semiconductor led using pulsation current and a driving unit of the semiconductor led using the method
KR101877195B1 (en) Method for driving organic electroluminescent element
JP4987177B1 (en) Illumination device and light emission control method
JP2014505352A (en) Electroluminescent device with adjustable color point
JP2005149744A (en) Lighting system
JP5578182B2 (en) Lighting device
JP2012209504A (en) Organic el lighting system
JP4976605B1 (en) Lighting device
WO2014097400A1 (en) Light emitting apparatus
JP5568687B2 (en) Illumination device and brightness adjustment method
CN109410843B (en) Method and device for driving electroluminescent device and electroluminescent device
WO2013054622A1 (en) Light emitting device and method for driving organic el element
JP5773465B2 (en) Organic EL lighting device
JPWO2014013586A1 (en) Surface emitting device
JP4976604B1 (en) Lighting device
JP2014134580A (en) Light emission apparatus and control unit
KR100953169B1 (en) color temperature control method using many color light emitting diode and am medium recording program for operating thereof
WO2013061405A1 (en) Illumination device
JP6307198B2 (en) LIGHT EMITTING DEVICE, CONTROL DEVICE, AND CONTROL METHOD
JP5556594B2 (en) Lighting device
JP2011134468A (en) Constant power driving device of organic el panel

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12890190

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12890190

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP