WO2013030973A1 - Lighting device - Google Patents
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- WO2013030973A1 WO2013030973A1 PCT/JP2011/069745 JP2011069745W WO2013030973A1 WO 2013030973 A1 WO2013030973 A1 WO 2013030973A1 JP 2011069745 W JP2011069745 W JP 2011069745W WO 2013030973 A1 WO2013030973 A1 WO 2013030973A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/18—Controlling the intensity of the light using temperature feedback
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/60—Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
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- 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
- H10K59/84—Parallel electrical configurations of multiple OLEDs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
A lighting device includes a lighting panel comprising a plurality of surface light emitters arranged in parallel with one another, and a drive unit for illuminating the lighting panel in a bright-light mode or in a low-light mode that is darker than the bright-light mode. The lighting device also includes a temperature detector for detecting the temperature of each of the surface light emitters and creating detection outputs. The drive unit stores the detection outputs created by the temperature detector during the bright-light mode for each of the surface light emitters. During the low-light mode, the drive unit selects a brightness level for each surface light emitter according to the stored detection outputs, and illuminates the surface light emitters to the selected brightness levels.
Description
本発明は、面発光部を含む照明装置に関する。
This invention relates to the illuminating device containing a surface light emission part.
従来、照明装置の面発光部として、例えば、複数のＬＥＤを平面上にマトリックス状に配列させて実質的に平面状に発光するＬＥＤ面発光部が知られている。さらに、有機エレクトロルミネッセンス（以下、有機ＥＬという）を利用した有機ＥＬ素子を用いたフィルム状又は板状の自発光型平面発光素子である有機ＥＬパネルも面発光部として知られている。
Conventionally, as a surface light emitting unit of a lighting device, for example, an LED surface light emitting unit that emits light in a substantially planar shape by arranging a plurality of LEDs in a matrix on a plane is known. Furthermore, an organic EL panel which is a film-like or plate-like self-luminous planar light emitting element using an organic EL element utilizing organic electroluminescence (hereinafter referred to as organic EL) is also known as a surface light emitting unit.
かかる面発光部においては経時変化による劣化の問題があり、かかる問題を解決する技術の１つが特許文献１に記載されている。特許文献１は、画像表示パネルを構成する発光素子から発せられる光を受光し、その素子毎の発光量を測定する受光素子と、測定された発光量を記憶するメモリ装置と、測定された発光量が所定基準値に近付くように画像信号の強度を補正する補正回路と、を備え発光素子の劣化による輝度低下を補償する画像表示装置を開示している。
In such a surface light emitting portion, there is a problem of deterioration due to aging, and one technique for solving such a problem is described in Patent Document 1. Patent Document 1 discloses a light receiving element that receives light emitted from a light emitting element that constitutes an image display panel, measures a light emission amount for each element, a memory device that stores the measured light emission amount, and a measured light emission. An image display device is disclosed that includes a correction circuit that corrects the intensity of an image signal so that the amount approaches a predetermined reference value, and compensates for a decrease in luminance due to deterioration of a light emitting element.
しかしながら、特許文献１に開示された発光素子の輝度低下の補償方式によれば、劣化の進行した発光素子に対してより大なる駆動電力が供給されることになり、劣化の進んだ発光素子においてはより急速に劣化が進行してしまうという問題がある。
However, according to the compensation method for the luminance reduction of the light emitting element disclosed in Patent Document 1, more driving power is supplied to the light emitting element that has deteriorated. Has a problem that the deterioration proceeds more rapidly.
仮に特許文献１に開示された発光素子の輝度低下の補償方式を、互いに並置された複数の面発光部から構成された照明パネルを含む照明装置に適用すると、劣化の進んだ面発光部はより大なる駆動電力が供給されて増々劣化が進行してしまうのである。
If the compensation method for luminance reduction of the light emitting element disclosed in Patent Document 1 is applied to an illumination device including an illumination panel composed of a plurality of surface light emitting units juxtaposed with each other, the surface light emitting unit with advanced deterioration is more As the driving power is increased, the deterioration further proceeds.
そこで、本発明は、複数の面発光部を含む照明装置であって当該面発光部の経時変化による輝度低下の進行速度のバラツキを抑制しつつ面発光部間の輝度ムラを抑制できる照明装置を提供することを課題の一例としている。
Therefore, the present invention provides an illumination device that includes a plurality of surface light emitting units, and is capable of suppressing unevenness in luminance between surface light emitting units while suppressing variations in the speed of decrease in luminance due to changes over time of the surface light emitting units. Providing is an example of the problem.
本発明の照明装置は、互いに並置された複数の面発光部からなる照明パネルと、明点灯モード又は該明点灯モードに比して暗い暗点灯モードにて前記照明パネルを点灯駆動する駆動部と、を含む照明装置であって、
前記面発光部の各々の温度を検知して検知出力を生成する温度検出部を更に含み、
前記駆動部は、前記明点灯モードの間に前記温度検出部によって生成される検知出力を前記面発光部毎に記憶しておいて、前記暗点灯モードの間は、当該記憶した検知出力に応じて前記面発光部毎に輝度を選定して、当該選定した輝度にて前記面発光部を点灯駆動することを特徴とする。 An illumination device of the present invention includes an illumination panel composed of a plurality of surface light emitting units juxtaposed to each other, and a drive unit that drives the illumination panel to light in a bright lighting mode or a darker lighting mode compared to the bright lighting mode. A lighting device comprising:
A temperature detection unit that detects a temperature of each of the surface light emitting units and generates a detection output;
The drive unit stores a detection output generated by the temperature detection unit for each of the surface light emitting units during the bright lighting mode, and according to the stored detection output during the dark lighting mode. Then, a luminance is selected for each of the surface light emitting units, and the surface light emitting unit is driven to be lit at the selected luminance.
前記面発光部の各々の温度を検知して検知出力を生成する温度検出部を更に含み、
前記駆動部は、前記明点灯モードの間に前記温度検出部によって生成される検知出力を前記面発光部毎に記憶しておいて、前記暗点灯モードの間は、当該記憶した検知出力に応じて前記面発光部毎に輝度を選定して、当該選定した輝度にて前記面発光部を点灯駆動することを特徴とする。 An illumination device of the present invention includes an illumination panel composed of a plurality of surface light emitting units juxtaposed to each other, and a drive unit that drives the illumination panel to light in a bright lighting mode or a darker lighting mode compared to the bright lighting mode. A lighting device comprising:
A temperature detection unit that detects a temperature of each of the surface light emitting units and generates a detection output;
The drive unit stores a detection output generated by the temperature detection unit for each of the surface light emitting units during the bright lighting mode, and according to the stored detection output during the dark lighting mode. Then, a luminance is selected for each of the surface light emitting units, and the surface light emitting unit is driven to be lit at the selected luminance.
以上の構成によれば、例えば夜間の就寝前の明るい「通常点灯」の他に就寝後の「常夜灯」という薄暗い点灯モード機能を有する複数の面発光部からなる照明装置において、「常夜灯モード」においては、劣化が進んだ面発光部への駆動電力を抑制して、通常点灯モードの照明パネルの発光ムラの進行を低減させることができる。
According to the above configuration, for example, in a lighting device including a plurality of surface light emitting units having a dim lighting mode function of “nightlight” after sleeping in addition to bright “normal lighting” before sleeping at night, in “nightlight mode” Can suppress the driving power to the surface light emitting portion that has deteriorated, and can reduce the progress of light emission unevenness of the lighting panel in the normal lighting mode.
以下、本発明の実施例を、図面を参照しつつ詳細に説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は本発明による照明装置１１の構成を示している。照明装置１１は、例えば二次元的に並べられた複数の面発光部２１を含む照明パネル２３と、ドライバ部２５と、複数の温度センサ２９と、温度検出部３１と、記憶部３３と、制御部３５と、コンソール２７と、を含む。なお、ドライバ部２５と、温度センサ２９と、温度検出部３１と、記憶部３３と、制御部３５と、コンソール２７と、は駆動部を構成する。
FIG. 1 shows a configuration of a lighting device 11 according to the present invention. The illumination device 11 includes, for example, an illumination panel 23 including a plurality of surface light emitting units 21 arranged two-dimensionally, a driver unit 25, a plurality of temperature sensors 29, a temperature detection unit 31, a storage unit 33, and a control. Part 35 and console 27. The driver unit 25, the temperature sensor 29, the temperature detection unit 31, the storage unit 33, the control unit 35, and the console 27 constitute a drive unit.
照明パネル２３は互いに並置された複数の面発光部２１からなり、例えば図２に示すように、面発光部２１は基盤２２の主表面に沿って並設されている。面発光部２１の各々には有機ＥＬ素子を用いることができる。面発光部は絶縁膜で発光エリアを区切った構成でも良いし、別々に作製した発光パネルでも良い。面発光部が発光パネルの場合、照明パネル２３は複数の発光パネルをタイリングした構成でも良い。
The illumination panel 23 includes a plurality of surface light emitting units 21 juxtaposed with each other. For example, as shown in FIG. 2, the surface light emitting units 21 are arranged along the main surface of the base 22. An organic EL element can be used for each of the surface light emitting portions 21. The surface light emitting unit may have a configuration in which the light emitting area is divided by an insulating film, or may be a separately manufactured light emitting panel. When the surface light emitting unit is a light emitting panel, the illumination panel 23 may have a configuration in which a plurality of light emitting panels are tiled.
ドライバ部２５は、例えば基盤２２の主裏面側に設けられ、複数の面発光部２１の各々に個別に接続され、面発光部２１毎に発光のための電力を供給して駆動する。ドライバ部２５はさらに制御部３５に接続され、制御部３５からの信号に応じて複数の面発光部２１の各々の輝度制御を伴った点灯及び消灯を個別に制御する。すなわち、制御部３５は、通常点灯モード（明点灯モードという）又は該明点灯モードに比して暗い常夜灯モード（暗点灯モードという）で照明パネル２３を発光せしめる輝度制御信号をドライバ部２５へ供給して、ドライバ部２５は照明パネル２３を明点灯モード又は暗点灯モードにて点灯駆動する。
The driver unit 25 is provided, for example, on the main back surface side of the base 22 and is individually connected to each of the plurality of surface light emitting units 21 to drive each surface light emitting unit 21 by supplying electric power for light emission. The driver unit 25 is further connected to the control unit 35, and individually controls lighting and extinction accompanied by luminance control of each of the plurality of surface light emitting units 21 according to a signal from the control unit 35. That is, the control unit 35 supplies the driver unit 25 with a luminance control signal for causing the lighting panel 23 to emit light in the normal lighting mode (referred to as the bright lighting mode) or the dark nightlight mode (referred to as the dark lighting mode) compared to the bright lighting mode. Then, the driver unit 25 drives the lighting panel 23 to be lit in the bright lighting mode or the dark lighting mode.
コンソール２７は、制御部３５に接続され、使用者による照明装置１１の点灯及び消灯や点灯モード切り替えなどの操作に応じた操作出力を制御部へ供給するための開閉スイッチを含むリモコンや部屋内に取り付けられる有線モジュールなどの装置である。
The console 27 is connected to the control unit 35, and is provided in a remote control or a room including an open / close switch for supplying an operation output to the control unit according to an operation such as turning on / off the lighting device 11 or switching a lighting mode by the user. A device such as a wired module to be attached.
温度検出部３１は制御部３５からの測定指令に応じて温度センサ２９からの温度信号を順次Ａ／Ｄ変換し温度の測定値を測定データとして制御部３５へ供給する。
The temperature detection unit 31 sequentially A / D converts the temperature signal from the temperature sensor 29 in accordance with a measurement command from the control unit 35 and supplies the temperature measurement value to the control unit 35 as measurement data.
図２に示すように、温度センサ２９の各々は、複数の面発光部２１の温度を検知できるように、例えば、面発光部２１と基盤２２との間の間隙に面発光部２１の裏面に対向する又は接触するように配置される。さらに、図３に示すように、様々な位置において温度センサ２９を矩形の面発光部２１の間（図３（Ａ）では面発光部の対角に、図３（Ｂ）では面発光部の長手方向の対向辺に、図３（Ｃ）では面発光部の短手方向の対向辺に、）に配置することができる。温度センサは面発光部２１の温度をそれぞれ検知できるように配置されていればよく、図示しないが、基盤や封止部材の外側に配置しても、基盤と封止部材と間に配置しても良い。温度センサは面発光部毎に１つに限定されず、面発光部の数より少ない数の温度センサを設けても良い。例えば、図３（Ｄ）に示すように、４個の面発光部２１に囲まれるように配置された１つの温度センサ２９を用いて、その周辺の面発光部２１を面発光部Ａ→面発光部Ｂ→面発光部Ｃ→面発光部Ｄと順に光らせて各面発光部２１の温度を測定することでも、各面発光部の温度を測定できる。
As shown in FIG. 2, each of the temperature sensors 29 is, for example, on the back surface of the surface light emitting unit 21 in the gap between the surface light emitting unit 21 and the base 22 so that the temperature of the plurality of surface light emitting units 21 can be detected. It arrange | positions so that it may oppose or contact. Further, as shown in FIG. 3, the temperature sensor 29 is placed between the rectangular surface light emitting portions 21 at various positions (in FIG. 3A, diagonally to the surface light emitting portion, and in FIG. It can be arranged on the opposite side in the longitudinal direction, on the opposite side in the short side direction of the surface light emitting portion in FIG. The temperature sensor only needs to be arranged so as to be able to detect the temperature of the surface light emitting unit 21, and although not shown, even if it is arranged outside the board or the sealing member, it is arranged between the board and the sealing member. Also good. The number of temperature sensors is not limited to one for each surface light emitting unit, and a smaller number of temperature sensors than the number of surface light emitting units may be provided. For example, as shown in FIG. 3 (D), using one temperature sensor 29 arranged so as to be surrounded by four surface light emitting units 21, the surface light emitting unit 21 in the vicinity thereof is converted into a surface light emitting unit A → surface. The temperature of each surface light emitting part can also be measured by measuring the temperature of each surface light emitting part 21 by sequentially emitting light from the light emitting part B → the surface light emitting part C → the surface light emitting part D.
制御部３５はＣＰＵなどで構成され、ドライバ部２５を介して面発光部２１それぞれの発光を独立に制御し、各面発光部２１の輝度及び点灯／消灯の制御を司る点灯制御ルーティンを実行する。制御部３５に接続された記憶部３３には制御部３５の制御で必要なプログラムや温度検出部３１からの測定データなどが保存される。制御部３５は、温度検出部３１からの測定データに基づき演算して、通常点灯モード中の照明パネル２３の複数の面発光部２１の測定値を生成する。例えば、図３（Ａ）に示す配置の場合、面発光部２１Ａの測定値は、面発光部周辺のセンサ２９Ａ，２９Ｂ，２９Ｃ，２９Ｄの測定値の平均値とする。また、制御部３５は、ドライバ部２５を介して、面発光部２１の有機ＥＬ素子各々に供給する駆動電流を制御して、点灯時の照明パネル２１の発光分布を規定して調光する。
The control unit 35 is configured by a CPU or the like, and independently controls the light emission of each surface light emitting unit 21 via the driver unit 25 and executes a lighting control routine for controlling the luminance and lighting / lighting off of each surface light emitting unit 21. . The storage unit 33 connected to the control unit 35 stores programs necessary for the control of the control unit 35, measurement data from the temperature detection unit 31, and the like. The control part 35 calculates based on the measurement data from the temperature detection part 31, and produces | generates the measured value of the some surface light emission part 21 of the illumination panel 23 in normal lighting mode. For example, in the arrangement shown in FIG. 3A, the measured value of the surface light emitting unit 21A is the average value of the measured values of the sensors 29A, 29B, 29C, and 29D around the surface light emitting unit. Further, the control unit 35 controls the drive current supplied to each organic EL element of the surface light emitting unit 21 via the driver unit 25 to regulate the light emission distribution of the lighting panel 21 at the time of lighting.
制御部３５は、明点灯モードの複数の面発光部２１の平均輝度よりも低い平均輝度となる暗点灯モードで照明パネル２３を発光せしめる輝度制御信号をドライバ部２５へ供給する。駆動部３５は、明点灯モードにおける温度検出部３１によって生成される検知出力（測定値）を面発光部毎に記憶しておいて、暗点灯モードにおいては、当該記憶した検知出力に応じて面発光部毎に所定輝度（基準値）を算出し選定して、当該選定した所定輝度にて面発光部を個別に点灯駆動する。
The control unit 35 supplies the driver unit 25 with a luminance control signal that causes the illumination panel 23 to emit light in the dark lighting mode that has an average luminance lower than the average luminance of the plurality of surface light emitting units 21 in the bright lighting mode. The drive unit 35 stores the detection output (measured value) generated by the temperature detection unit 31 in the bright lighting mode for each surface light emitting unit. In the dark lighting mode, the driving unit 35 responds to the stored detection output. A predetermined luminance (reference value) is calculated and selected for each light emitting unit, and the surface light emitting units are individually driven to be lit at the selected predetermined luminance.
また更に、制御部３５は、記憶部３３で保存された測定値に基づいて面発光部毎の輝度の基準値を算出する際に、制御部３５は、明点灯モードにおける面発光部の測定値（現在）温度に応じた基準値の設定のみならず、当該測定値（現在）温度の変化率（劣化速度に対応すると考えられる）に応じて基準値の大きさを変化させることもできる。例えば、制御部３５は面発光部毎の保存された前回測定値と今回測定値との差分を検知温度変化率として算出し、当該検知温度変化率を用いて今回測定値と演算して、パネル毎の劣化速度を考慮して、面発光部毎の輝度の新たな基準値を算出する。
Furthermore, when the control unit 35 calculates the luminance reference value for each surface light emitting unit based on the measurement value stored in the storage unit 33, the control unit 35 measures the measurement value of the surface light emitting unit in the bright lighting mode. In addition to setting the reference value according to the (current) temperature, the size of the reference value can be changed according to the rate of change of the measured value (current) temperature (which is considered to correspond to the deterioration rate). For example, the control unit 35 calculates a difference between the previous measured value and the current measured value stored for each surface light emitting unit as the detected temperature change rate, calculates the current measured value using the detected temperature change rate, and calculates the panel A new reference value of luminance for each surface light emitting unit is calculated in consideration of the deterioration rate for each.
次に、かかる構成の照明装置の動作を制御部３５の実行する点灯制御フローに従って説明する。
Next, the operation of the lighting device having such a configuration will be described in accordance with a lighting control flow executed by the control unit 35.
図４に示すように、制御部３５は先ず、使用者によりモード制御としてコンソール２７（図１）が操作された時、点灯入力か否か判断する（ステップＳ１）。点灯入力が無ければ、制御部３５はドライバ部２５へ消灯指令を送り、面発光部２１すべての発光を停止させる（ステップＳ２）。ステップＳ１で点灯入力があれば、指定された点灯モード、すなわち明点灯モード入力か否かを判別する（ステップＳ３）。明点灯モード入力があれば、制御部３５はドライバ部２５へ明点灯指令を送り（ステップＳ４）、ドライバ部２５は複数の面発光部２１へ電力を供給し駆動する。この場合、照明パネル２３は明点灯モードとして例えば単一レベルの通常輝度で白色点灯する。
As shown in FIG. 4, the control unit 35 first determines whether or not a lighting input is made when the user operates the console 27 (FIG. 1) as mode control (step S1). If there is no lighting input, the control unit 35 sends a turn-off command to the driver unit 25, and stops the light emission of all the surface light emitting units 21 (step S2). If there is a lighting input in step S1, it is determined whether or not it is a designated lighting mode, that is, a bright lighting mode input (step S3). If there is a bright lighting mode input, the control unit 35 sends a bright lighting command to the driver unit 25 (step S4), and the driver unit 25 supplies power to the plurality of surface light emitting units 21 to drive them. In this case, the illumination panel 23 is lit white as a bright lighting mode, for example, with a single level of normal luminance.
明点灯モード開始の後、制御部３５は照明パネルの温度が飽和する時間などの閾値時間の経過を監視する（ステップＳ５）。閾値時間を経過したならば、制御部３５は測定指令信号を温度検出部３１へ送り、測定開始信号に応じて温度検出部３１が温度測定を実行する（ステップＳ６）。温度検出部３１は温度センサ２９からの温度信号を測定データとし生成し、制御部３５はこれを取り込んで、記憶部３３内の測定データマップ（図示せず）を更新する。続いて、制御部３５は、記憶部３３に保存された測定データ（測定値）に基づいて暗点灯モードのための基準値を面発光部２１毎に算出して生成し、得られた基準値を例えば基準値データマップ（図示せず）として記憶部３３に記憶する（ステップＳ７）。
After starting the bright lighting mode, the control unit 35 monitors the passage of a threshold time such as the time when the temperature of the lighting panel is saturated (step S5). If the threshold time has elapsed, the control unit 35 sends a measurement command signal to the temperature detection unit 31, and the temperature detection unit 31 performs temperature measurement according to the measurement start signal (step S6). The temperature detection unit 31 generates a temperature signal from the temperature sensor 29 as measurement data, and the control unit 35 captures this and updates a measurement data map (not shown) in the storage unit 33. Subsequently, the control unit 35 calculates and generates a reference value for the dark lighting mode for each surface light emitting unit 21 based on the measurement data (measurement value) stored in the storage unit 33, and the obtained reference value Is stored in the storage unit 33 as a reference value data map (not shown), for example (step S7).
ステップＳ３でコンソール２７からの暗点灯モード指令入力という判別結果が得られたならば、制御部３５は基準値データマップを取り込み（ステップＳ８）、ドライバ部２５へ暗点灯指令を送り（ステップＳ９）、ドライバ部２５が複数の面発光部２１の各々を上記の基準値に応じて多様な輝度レベルの常夜灯パターンで点灯させる。
If a determination result of dark lighting mode command input from the console 27 is obtained in step S3, the control unit 35 takes in the reference value data map (step S8) and sends a dark lighting command to the driver unit 25 (step S9). The driver unit 25 turns on each of the plurality of surface light emitting units 21 with a nightlight pattern having various luminance levels according to the reference value.
なお、上記温度測定の閾値時間は例えば数分程度である。また、上記例では、明点灯モード毎に温度測定を行っているが、これには限定されず、温度測定を、照明パネルの一部若しくは全部の交換又は照明パネルの設置場所の変更を行った場合に、手動又は自動で１回行うように構成することも出来る。
Note that the temperature measurement threshold time is, for example, several minutes. In the above example, temperature measurement is performed for each bright lighting mode. However, the present invention is not limited to this, and the temperature measurement was performed by replacing part or all of the lighting panel or changing the installation location of the lighting panel. In some cases, it may be configured to be performed manually or automatically once.
つぎに、制御部３５における基準値の設定方法の一例を以下に説明する。
Next, an example of a reference value setting method in the control unit 35 will be described below.
一般的に、図５に示すように、有機ＥＬ素子など発光素子は駆動時間とともに高抵抗化し明るさ（輝度Ｌ）が低下すなわち劣化する。よって、例えば、初期電流供給量で得られた発光素子の輝度を、同じに保つためには時間経過後では供給電流を増やす必要がある。例えばマトリクス（１０×１０）に並べた１００個の有機ＥＬ素子の面発光部を長時間駆動した場合において、かかる高抵抗化や輝度低下にはバラツキが存在する。図６（Ａ）に示すように、明点灯モードで経時劣化したこれらの面発光部を定電流駆動して、ほぼ均一輝度Ｌｏａｖで発光させた場合に、劣化のバラツキにより、図６（Ｂ）に示すように、複数の面発光部に発熱（温度Ｔ）のバラツキが生じる。
Generally, as shown in FIG. 5, the light emitting element such as an organic EL element becomes highly resistive with the driving time, and the brightness (luminance L) is reduced, that is, deteriorated. Therefore, for example, in order to keep the luminance of the light emitting element obtained with the initial current supply amount the same, it is necessary to increase the supply current after elapse of time. For example, in the case where the surface light emitting portions of 100 organic EL elements arranged in a matrix (10 × 10) are driven for a long time, there are variations in such high resistance and low luminance. As shown in FIG. 6A, when these surface light emitting portions deteriorated with time in the bright lighting mode are driven with a constant current to emit light with substantially uniform luminance Loav, due to variation in deterioration, FIG. As shown in FIG. 4, the variation in heat generation (temperature T) occurs in the plurality of surface emitting portions.
そこで、明点灯モードで測定した温度に関して降順に面発光部を並べ替えると、図７（Ａ）に示すように、複数の面発光部の測定温度の右下がりのフィット又は包絡線Ｆが得られる。かかる右下がりの包絡線Ｆ（点灯モードでの測定温度データ）に基づいて、図７（Ｂ）に示すような右上がりの基準線Ｌｒｅｆを算出して、暗点灯モードの面発光部の各々の輝度を基準値として設定する。図７に示すように面発光部の明点灯モードの測定温度データと暗点灯モードの輝度分布を反比例関係とすることにより、明点灯モードで温度が高かった面発光部ほど暗点灯モードに輝度を下げることができる。例えば、右上がりの基準線Ｌｒｅｆをなす面発光部毎の基準値ＬｒはＬｒ＝α・１／（測定温度Ｔ）を満たすように算定できる（ただし、αは所定係数である）。結果として、明点灯モードで温度が高く劣化が進みやすい面発光部ほど、暗点灯モードに低負荷にすることにより、面発光部毎の劣化度合いがそれらの平均値に近付き、明点灯モードの照度ムラが低減する。ただし、明点灯モードでの平均輝度Ｌｏａｖと暗点灯モードでの平均輝度ＬａｖとはＬｏａｖ＞Ｌａｖとなされる。基準値は、例えば、複数の面発光部のすべてにおいて、暗点灯モードでは明点灯モードに比べて輝度が低くなるように、設定されている。
Therefore, when the surface light emitting units are rearranged in descending order with respect to the temperature measured in the bright lighting mode, as shown in FIG. . Based on the downward-sloping envelope F (measured temperature data in the lighting mode), a upward-sloping reference line Lref as shown in FIG. 7B is calculated, and each of the surface light emitting units in the dark lighting mode is calculated. Set the brightness as the reference value. As shown in FIG. 7, by making the measured temperature data in the bright lighting mode of the surface light emitting part and the luminance distribution in the dark lighting mode in inverse proportion, the surface light emitting part having a higher temperature in the bright lighting mode has a higher luminance in the dark lighting mode. Can be lowered. For example, the reference value Lr for each surface emitting part forming the reference line Lref that rises to the right can be calculated so as to satisfy Lr = α · 1 / (measured temperature T) (where α is a predetermined coefficient). As a result, the surface light emitting part where the temperature is high and the deterioration tends to progress in the bright lighting mode, the lower the load in the dark lighting mode, the degree of deterioration of each surface light emitting part approaches their average value, and the illuminance of the bright lighting mode Unevenness is reduced. However, the average luminance Loav in the bright lighting mode and the average luminance Lav in the dark lighting mode are Loav> Lav. The reference value is set so that, for example, the luminance in the dark lighting mode is lower than that in the bright lighting mode in all of the plurality of surface light emitting units.
更に、図８（Ａ）に示すような複数の面発光部の輝度の測定温度が右下がりのフィット又は包絡線Ｆの照明パネルの場合、暗点灯モードにおいて、図８（Ｂ）に示すように、直線的でなく指数関数的な右上がりの基準線Ｌｒｅｆにおける面発光部の各々の輝度を基準値（暗点灯モードのための基準値データマップ）として設定することもできる。
Furthermore, in the case of a lighting panel having a fitting temperature or envelope F whose brightness measurement temperature of a plurality of surface light emitting units is lower right as shown in FIG. 8A, in the dark lighting mode, as shown in FIG. The brightness of each of the surface light emitting portions on the reference line Lref that is not linear but exponentially increased can also be set as a reference value (reference value data map for the dark lighting mode).
更に、図９（Ａ）に示すような複数の面発光部の輝度の測定温度が右下がりのフィット又は包絡線Ｆの照明パネルの場合、暗点灯モードにおいて、図９（Ｂ）に示すように、直線又は曲線的でなく幾つかに区画して階段的な右上がりの基準線Ｌｒｅｆにおける面発光部の各々の輝度を基準値として設定することもできる。予め測定温度を幾つかの範囲に例えば３つの範囲に分けて、当該範囲毎に輝度を基準値として設定しておく。このように、暗点灯モードの面発光部に設定した輝度は、記憶した明点灯モードの測定温度データに対して直線的若しくは非直線的な反比例関係にある。
Further, in the case of a lighting panel having a fitting temperature or envelope F where the brightness measurement temperature of a plurality of surface emitting units is lower right as shown in FIG. 9A, in the dark lighting mode, as shown in FIG. 9B. The brightness of each of the surface light emitting portions on the reference line Lref that rises to the right in a stepwise manner divided into several parts instead of a straight line or a curve can be set as a reference value. The measurement temperature is divided into several ranges in advance, for example, into three ranges, and the brightness is set as a reference value for each range. Thus, the luminance set for the surface light emitting unit in the dark lighting mode is in a linear or non-linear inverse proportional relationship with the stored measured temperature data in the bright lighting mode.
更に、図１０（Ａ）に示すような複数の面発光部の輝度の測定温度が右下がりのフィット又は包絡線Ｆの照明パネルの場合、暗点灯モードにおいて、図１０（Ｂ）に示すように、予め測定温度を２つの範囲に設定し、範囲ごとに面発光部の各々の輝度を基準値として設定することもできる。例えば、図１０（Ａ）に示す閾値測定温度Ｓｈ以下では図７（Ｂ）に示すような暗点灯モードで点灯させ、明点灯モードにて最高温度（又は閾値測定温度Ｓｈ以上）の面発光部場合には完全に消灯（少なくとも１つ）するように（Ｌｒｅｆ－１）、又は、明点灯モードで最低温度（又はその近傍の所定温度範囲）の面発光部を監視し暗点灯モードで最低温度又はその近傍温度の面発光部を例えば明点灯モードより輝度の高い輝度で少なくとも１つ点灯するように（Ｌｒｅｆ－２）、設定することもできる。なお、かかる基準線Ｌｒｅｆ－２の場合を除き、基準値は、暗点灯モードにおけるいずれの面発光部の輝度は、０≦（暗点灯モードでの面発光部の輝度）／（最も明るい明点灯モードの輝度）≦１の範囲内に収められるように設定される。
Further, in the case of a lighting panel with a fitting or envelope F where the brightness measurement temperature of the plurality of surface light emitting units is lower right as shown in FIG. 10 (A), in the dark lighting mode, as shown in FIG. 10 (B). The measurement temperature can be set in two ranges in advance, and the luminance of each surface light emitting unit can be set as a reference value for each range. For example, a surface emitting unit that is turned on in the dark lighting mode as shown in FIG. 7B below the threshold measurement temperature Sh shown in FIG. 10A and has the highest temperature (or higher than the threshold measurement temperature Sh) in the bright lighting mode. In such a case, turn off completely (at least one) (Lref-1), or monitor the surface light emitting part at the lowest temperature (or a predetermined temperature range in the vicinity) in the bright lighting mode and check the lowest temperature in the dark lighting mode. Alternatively, it is possible to set so that at least one of the surface light emitting portions at a temperature near that is lit at a luminance higher than that in the bright lighting mode (Lref-2). Except for the case of the reference line Lref-2, the reference value is that the luminance of any surface light emitting unit in the dark lighting mode is 0 ≦ (the luminance of the surface light emitting unit in the dark lighting mode) / (the brightest bright lighting) The brightness of the mode is set to fall within a range of ≦ 1.
また、上記した各実施例においては、白色発光の有機ＥＬ素子（例えば、Iridium(III)bis[(4,6-di-nuoropheny)-pyridinato-N,C2']picolinate(FIrpic)などの青色発光層上に黄色蛍光層を用いたもの）からなる面発光部が用いられ得るが、カラー面発光部を用いても良い。たとえば、カラー面発光部は、ガラス基板上に陽極、ホール注入層、ホール輸送層、ＲＧＢ発光層、電子注入輸送層、及び陰極の順に積層された構造を有している。陽極は例えばＩＴＯ膜からなる。ホール注入層はＣｕＰｃ膜からなる。ホール輸送層はＮＰＢ膜からなる。ＲＧＢ発光層は、Ｒ（赤）発光層はＣＰＢをホスト材料とし、Ｉｒ(ｐｈｑ）２ｔｐｙをドーパントとしており、Ｇ（緑）発光層はＣＰＢをホスト材料とし、Ｉｒ(ｐｐｙ)３をドーパントとしており、Ｂ（青）発光層はＰＡＮＤをホスト材料とし、ＤＰＡＶＢｉをドーパントとした３層である。電子輸送層はＡｌｑ３膜からなる。電子注入材料はＬｉＦからなる。陰極はＡｌ膜からなる。なお、この面発光部２１の内部構造は一例であり、本発明はこれに限定されない。
In each of the above-described embodiments, a white light-emitting organic EL element (for example, blue light emission such as Iridium (III) bis [(4,6-di-nuoropheny) -pyridinato-N, C2 ′] picolinate (FIrpic)) Although a surface light emitting portion made of a yellow fluorescent layer on the layer can be used, a color surface light emitting portion may be used. For example, the color surface light emitting portion has a structure in which an anode, a hole injection layer, a hole transport layer, an RGB light emission layer, an electron injection transport layer, and a cathode are stacked in this order on a glass substrate. The anode is made of, for example, an ITO film. The hole injection layer is made of a CuPc film. The hole transport layer is made of an NPB film. The RGB light emitting layer has an R (red) light emitting layer with CPB as a host material and Ir (phq) 2tpy as a dopant, and a G (green) light emitting layer with CPB as a host material and Ir (ppy) 3 as a dopant. , B (blue) light emitting layer is a triple layer using PAND as a host material and DPAVBi as a dopant. The electron transport layer is made of an Alq3 film. The electron injection material is made of LiF. The cathode is made of an Al film. In addition, the internal structure of this surface light emission part 21 is an example, and this invention is not limited to this.
さらに、本発明は、有機ＥＬ素子の面発光部だけでなく、複数の無機ＥＬ素子からなる面発光部や複数のＬＥＤ等の発光ダイオードの発光素子を用いた面発光部にも適用できる。
Furthermore, the present invention can be applied not only to a surface light emitting portion of an organic EL element, but also to a surface light emitting portion using a light emitting element of a light emitting diode such as a surface light emitting portion composed of a plurality of inorganic EL elements or a plurality of LEDs.
１１ 照明装置
２１ 面発光部
２２ 基盤
２３ 照明パネル
２５ ドライバ部
２７ コンソール
２９ 温度センサ
３１ 温度検出部
３３ 記憶部
３５ 制御部 DESCRIPTION OFSYMBOLS 11 Illuminating device 21 Surface light emission part 22 Base 23 Illumination panel 25 Driver part 27 Console 29 Temperature sensor 31 Temperature detection part 33 Memory | storage part 35 Control part
２１ 面発光部
２２ 基盤
２３ 照明パネル
２５ ドライバ部
２７ コンソール
２９ 温度センサ
３１ 温度検出部
３３ 記憶部
３５ 制御部 DESCRIPTION OF
Claims (12)
- 互いに並置された複数の面発光部からなる照明パネルと、
明点灯モード又は該明点灯モードに比して暗い暗点灯モードにて前記照明パネルを点灯駆動する駆動部と、を含む照明装置であって、
前記面発光部の各々の温度を検知して検知出力を生成する温度検出部を更に含み、
前記駆動部は、前記明点灯モードの間に前記温度検出部によって生成される検知出力を前記面発光部毎に記憶しておいて、前記暗点灯モードの間は、当該記憶した検知出力に応じて前記面発光部毎に輝度を選定して、当該選定した輝度にて前記面発光部を点灯駆動することを特徴とする照明装置。 An illumination panel comprising a plurality of surface light emitting units juxtaposed with each other;
A lighting unit including a driving unit that drives the lighting panel in a bright lighting mode or a dark lighting mode that is darker than the bright lighting mode,
A temperature detection unit that detects a temperature of each of the surface light emitting units and generates a detection output;
The drive unit stores a detection output generated by the temperature detection unit for each of the surface light emitting units during the bright lighting mode, and according to the stored detection output during the dark lighting mode. A luminance is selected for each surface light emitting unit, and the surface light emitting unit is driven to be lit at the selected luminance. - 前記明点灯モードでは前記面発光部が全体として単一輝度レベルであり、前記暗点灯モードでは前記面発光部が前記明点灯モードの輝度レベルよりも全体として低輝度で且つ多様な輝度レベルであることを特徴とする請求項１に記載の照明装置。 In the bright lighting mode, the surface light emitting unit as a whole has a single luminance level, and in the dark lighting mode, the surface light emitting unit as a whole has a lower luminance and various luminance levels than the luminance level of the bright lighting mode. The lighting device according to claim 1.
- 前記駆動部は、前記記憶した検知出力に応じた基準値を前記面発光部毎に生成しておいて、前記基準値の大きさに応じて前記選定した輝度を選定することを特徴とする請求項１に記載の照明装置。 The drive unit generates a reference value corresponding to the stored detection output for each surface light emitting unit, and selects the selected luminance according to the size of the reference value. Item 2. The lighting device according to Item 1.
- 前記基準値は、前記明点灯モードで温度が高い面発光部ほど、前記暗点灯モードでは前記明点灯モードに比べて前記選定した輝度が低くなるように、設定されることを特徴とする請求項３に記載の照明装置。 The reference value is set so that a surface light emitting unit having a higher temperature in the bright lighting mode has a lower brightness in the dark lighting mode than in the bright lighting mode. 3. The lighting device according to 3.
- 前記選定した輝度は、前記記憶した検知出力に対して直線的若しくは非直線的な反比例関係にあることを特徴とする請求項１に記載の照明装置。 The lighting device according to claim 1, wherein the selected luminance has a linear or non-linear inverse proportional relationship with respect to the stored detection output.
- 前記駆動部は、前記明点灯モード毎に記憶した検知出力の前回値と今回値との差分を検知温度変化率として算出し、当該検知温度変化率と当該今回値とに応じた基準値を生成することを特徴とする請求項４に記載の照明装置。 The drive unit calculates a difference between the previous value and the current value of the detected output stored for each bright lighting mode as a detected temperature change rate, and generates a reference value corresponding to the detected temperature change rate and the current value The lighting device according to claim 4, wherein:
- 前記温度検出部は、前記面発光部の各々の発光面の中央部若しくは側方に設けられた少なくとも１つの温度センサを含むことを特徴とする請求項１乃至６のいずれか１項に記載の照明装置。 The said temperature detection part contains the at least 1 temperature sensor provided in the center part or side of each light emission surface of the said surface light emission part, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. Lighting device.
- 前記温度検出部は、前記複数の面発光部の内のいくつかに対して１つの温度センサが対応しているように前記面発光部の数より少ない数の温度センサを含むことを特徴とする請求項１乃至６のいずれか１項に記載の照明装置。 The temperature detecting unit includes a number of temperature sensors smaller than the number of the surface light emitting units so that one temperature sensor corresponds to some of the plurality of surface light emitting units. The lighting device according to any one of claims 1 to 6.
- 前記面発光部が少なくとも１つの有機ＥＬ素子からなることを特徴とする請求項１乃至８のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 1 to 8, wherein the surface light-emitting portion includes at least one organic EL element.
- 前記面発光部は発光エリアを絶縁膜で区切って作成された面発光部であることを特徴とする請求項１乃至９のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 1 to 9, wherein the surface light emitting unit is a surface light emitting unit formed by dividing a light emitting area with an insulating film.
- 前記面発光部は個別に作成された面発光部であることを特徴とする請求項１乃至９のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 1 to 9, wherein the surface light emitting unit is a surface light emitting unit created individually.
- 互いに並置された複数の面発光部からなる照明パネルと、明点灯モード又は該明点灯モードに比して暗い暗点灯モードにて前記照明パネルを点灯駆動する駆動部と、前記面発光部の各々の温度を検知して検知出力を生成する温度検出部と、を含む照明装置による照明方法であって、
前記明点灯モードの間に前記温度検出部によって生成される検知出力を前記面発光部毎に記憶するステップと、前記暗点灯モードの間は、当該記憶した検知出力に応じて前記面発光部毎に輝度を選定して、当該選定した輝度にて前記面発光部を点灯駆動するステップと、を含むことを特徴とする照明方法。
Each of the lighting panel comprising a plurality of surface light emitting units juxtaposed to each other, a driving unit that drives the lighting panel to light in a bright lighting mode or a dark lighting mode darker than the bright lighting mode, and each of the surface light emitting units A temperature detection unit that detects the temperature of and generates a detection output;
During the bright lighting mode, the step of storing the detection output generated by the temperature detection unit for each surface light emitting unit, and during the dark lighting mode, for each surface light emitting unit according to the stored detection output And a step of selecting the luminance and driving the surface light emitting unit to light at the selected luminance.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2012507534A JP4976604B1 (en) | 2011-08-31 | 2011-08-31 | Lighting device |
| PCT/JP2011/069745 WO2013030973A1 (en) | 2011-08-31 | 2011-08-31 | Lighting device |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2011/069745 WO2013030973A1 (en) | 2011-08-31 | 2011-08-31 | Lighting device |
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| WO2013030973A1 true WO2013030973A1 (en) | 2013-03-07 |
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| PCT/JP2011/069745 WO2013030973A1 (en) | 2011-08-31 | 2011-08-31 | Lighting device |
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| WO (1) | WO2013030973A1 (en) |
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| WO2017080790A1 (en) * | 2015-11-10 | 2017-05-18 | Osram Oled Gmbh | Organic light-emitting component device, method for producing an organic light-emitting component device and method for operating an organic light-emitting component device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014097396A1 (en) * | 2012-12-18 | 2014-06-26 | パイオニア株式会社 | Light-emitting device and method for controlling light-emitting device |
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| JP2003317944A (en) * | 2002-04-26 | 2003-11-07 | Seiko Epson Corp | Electro-optic element and electronic apparatus |
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| WO2017080790A1 (en) * | 2015-11-10 | 2017-05-18 | Osram Oled Gmbh | Organic light-emitting component device, method for producing an organic light-emitting component device and method for operating an organic light-emitting component device |
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Also Published As
| Publication number | Publication date |
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| JP4976604B1 (en) | 2012-07-18 |
| JPWO2013030973A1 (en) | 2015-03-23 |
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