JP2013127924A - Light-emitting device, light-emitting system, and light-emitting device control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device, a light-emitting system, and a light-emitting device control method, which, even when surface light-emitting panels having different characteristics are used, can reduce variations in brightness or the like in a simple manner at low cost without lowering yields at the time of light-emitting device manufacturing.SOLUTION: A light-emitting device includes: at least one surface light-emitting panel; a light emission control part for controlling a light-emitting state of the surface light-emitting panel; and a power supply part for supplying electric power to the surface light-emitting panel. The surface light-emitting panel has a unique control ID. The light emission control part acquires the control ID from the surface light-emitting panel, reads control information associated with the control ID from information table having the control ID and the control information associated with the control ID, and generates a control signal based on the read control information. The power supply part supplies electric power corresponding to the control signal to the surface light-emitting panel.

Description

  The present invention relates to a light emitting device and a light emitting system having a surface light emitting panel, and a method for controlling the light emitting device having a surface light emitting panel.

  In recent years, surface-emitting lighting devices have been attracting attention as next-generation lighting because of their soft impression of light and energy saving, and organic electroluminescence (organic EL (Electro Luminescence), OEL: Organic Electro Luminescence), or light emission. A combination of a diode and a light guide plate has been developed. In particular, organic EL has been attracting attention in terms of being capable of reducing the size and weight of the device, and further generating little heat.

  Here, organic EL refers to a phenomenon in which energy is applied to a light-emitting material made of an organic substance to apply energy, and energy is released as light when the excited light-emitting material returns to its original state. Say. An organic EL light-emitting element, which is a light-emitting element using organic EL technology, includes an organic layer containing a light-emitting material made of an organic substance and two electrodes (a cathode and an anode) facing each other so as to sandwich the organic layer. A structure in which layers are sequentially stacked is generally used.

  Since the organic EL light-emitting element can change the emission wavelength by changing the type of the light-emitting material, for example, by mixing three types of light-emitting materials of red, green, and blue, a single organic EL light-emitting element can be used. White light can be obtained. In addition, by arranging two or more types of organic EL light-emitting elements containing light-emitting materials having different emission colors in parallel and flowing current independently to each of the organic EL light-emitting elements, for example, various lights can be emitted as synthesized light. It is also possible to obtain a variable color luminescent panel that emits light.

  A surface-emitting panel including the organic EL light-emitting element as described above can be used for lighting applications, and can also be used for interiors or exteriors in buildings and vehicles. For example, Patent Document 1 discloses an example in which a surface light-emitting panel composed of organic EL light-emitting elements is used as general illumination.

  The surface light emitting panel composed of the organic EL light emitting elements as described above has a more complicated structure than conventional incandescent bulbs and fluorescent lamps. Therefore, the relationship between current and light emission luminance differs from product to product, and the same current is used. Even if it flows, the brightness may vary from product to product. Further, when such a problem occurs, in particular, in a surface emitting panel that emits a composite color using the organic EL light emitting elements having different emission colors as described above, not only the luminance but also the color changes. Therefore, in order to eliminate the influence of the variation in luminance for each element, it may be necessary to take a measure such as inspecting each element and discarding the element having a large variation.

  In general, lighting devices and devices other than light emitters (light emission control units, power supply units, etc.) are manufactured by a plurality of manufacturers, but they are not necessarily light emitters and light emitters of the same manufacturer. Are not used in combination. In such a case, since the structure of the device and the material used are different for each manufacturer, the light emission characteristics may vary. Even in the same manufacturer, the structure of the equipment and the materials used may differ depending on the product lot, product design change, and the like. As a result, there may be variations in characteristics that are considered to affect the control of the light emitter, such as the relationship between power and light emission luminance, the relative luminance of each color, temperature dependence, and lifetime.

  In order to solve such a problem, for example, Patent Document 2 discloses a technique in which a light emitter is used in combination with a control device in which a current pattern for causing the light emitter to emit light is stored in advance. . Patent Document 3 discloses a technique in which a lighting device includes an optical sensor and measures and corrects the light emission characteristics thereof.

JP 2011-18483 A US Patent Application Publication No. 2009/026983 International Publication No. 2005/096258

  However, reducing variations due to inspection results in a decrease in product yield, leading to a decrease in shipment volume and an increase in production cost. Further, the method of storing the current pattern for causing the light emitter to emit light in the control device in advance cannot cope with the replacement of the light emitter. Even when the light emission characteristic is corrected in accordance with the measurement result by the optical sensor, an optical sensor is required for each lighting device, so that the cost of the lighting system itself increases. Moreover, since the optical sensor is also affected by external light, there is a possibility that measurement accuracy is insufficient.

  The present invention has been made in view of such problems, and the object of the present invention is simple and low-cost without reducing the yield when manufacturing light-emitting devices, even when using surface-emitting panels having different characteristics. An object of the present invention is to provide a light emitting device, a light emitting system, and a method for controlling the light emitting device that can reduce variations in luminance and the like.

  In order to achieve the above object, the present inventors have intensively studied. As a result, the inventors have found that the above-described problems can be solved by the following light-emitting device, light-emitting system, and light-emitting device control method, and completed the present invention.

  That is, the first gist of the present invention is a light emitting device having at least one surface light emitting panel, a light emission control unit that controls a light emission state of the surface light emitting panel, and a power supply unit that supplies power to the surface light emitting panel. The surface light emitting panel has a unique control ID, the light emission control unit acquires the control ID from the surface light emitting panel, and the control ID is obtained from an information table having the control ID and control information corresponding to the control ID. , A control signal based on the read control information is generated, and the power supply unit supplies power corresponding to the control signal to the surface light emitting panel. Exist.

  A second gist of the present invention resides in the light emitting device according to the first gist, wherein the information table is stored in a storage unit in the light emitting device.

  According to a third aspect of the present invention, the light emission control unit reads control information corresponding to the control ID from the information table stored in an external recording medium via a communication line. It exists in the light-emitting device of description.

  The fourth gist of the present invention resides in the light emitting device according to the third gist, wherein the communication line is an internet line.

  A fifth aspect of the present invention is the light emission according to any one of the first to fourth aspects, wherein the light emission control unit can update the information table based on update information supplied from the outside. Exists in the device.

  A sixth aspect of the present invention is that the information table includes standard control information used instead of the control information corresponding to the control ID when the light emission control unit cannot read the control information corresponding to the control ID. The light emission control unit generates a control signal based on the standard control information when the control information corresponding to the control ID cannot be read. Exist in the light emitting device.

  According to a seventh aspect of the present invention, the control information corresponds to the control ID, and indicates a relationship between at least one of power, voltage, and current supplied to the surface light emitting panel and luminance in the surface light emitting panel. The light-emitting device according to any one of the first to sixth aspects is characterized by including information to be expressed.

  An eighth aspect of the present invention resides in the light emitting device according to any one of the first to seventh aspects, wherein the surface light emitting panel is a light emitting panel made of an organic EL light emitting element.

  According to a ninth aspect of the present invention, there are a plurality of the surface light emitting panels, each of the surface light emitting panels has a unique identification ID for identifying each, and the power supply unit responds to the control signal. The light emitting device according to any one of the first to eighth aspects is characterized in that electric power is supplied to each of the surface light emitting panels based on the identification ID.

  A tenth aspect of the present invention resides in a light-emitting system including the light-emitting device according to any one of the first to ninth aspects.

  An eleventh aspect of the present invention is a method for controlling a light emitting device having at least one surface emitting panel, the step of obtaining a unique control ID provided in the surface emitting panel, the control ID and the control ID Reading control information corresponding to the control ID from an information table having corresponding control information, generating a control signal based on the control information, and supplying power corresponding to the control signal to the surface emitting panel And a step of controlling the light-emitting device.

  A twelfth aspect of the present invention is a method for controlling a light emitting device according to the eleventh aspect, wherein the light emitting device includes a plurality of surface light emitting panels, and the step of supplying the electric power is performed on the surface light emitting panel. The present invention resides in a method for controlling a light emitting device, wherein power is supplied to each of the surface light emitting panels based on a unique identification ID for identifying each of the respective surfaces.

  With the above-described configuration, the light-emitting device, the light-emitting system, and the light-emitting device control method of the present invention can increase the compatibility of the surface-emitting panel and the light-emitting device having different characteristics easily and at low cost.

  Moreover, since the light-emitting device, the light-emitting system, and the light-emitting device control method of the present invention can be applied to a surface light-emitting panel having a wide characteristic range, the yield in manufacturing the surface light-emitting panel can be improved.

  Furthermore, the light emitting device, the light emitting system, and the method for controlling the light emitting device according to the present invention appropriately respond to a new surface emitting panel that has been put on the market after manufacturing the light emitting device and the light emitting system, and supply appropriate power. can do.

  And according to the lighting device, the light emitting system, and the method for controlling the light emitting device of the present invention, in particular, even when the surface light emitting panel is replaced with a surface light emitting panel having a different light emitting characteristic, the brightness and the like can be easily adjusted. Can be done.

It is a block diagram which shows the outline of the light-emitting device which concerns on 1st Example. It is a perspective view of the surface emitting panel which comprises the light-emitting device of 1st Example. It is a top view of the surface emitting panel which comprises the light-emitting device of 1st Example. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a figure for demonstrating the structure of control ID which the surface emitting panel which comprises the light-emitting device based on 1st Example has. It is an electric circuit diagram which shows the connection relation of the surface emitting panel which comprises the light-emitting device of 1st Example, an electric power supply part, and the light emission control part. It is a figure for demonstrating the structure of the information table which the light emission control part which comprises the light-emitting device which concerns on 1st Example holds. It is a figure for demonstrating the structure of the control information which the light emission control part which comprises the light-emitting device based on 1st Example has. It is a flowchart explaining a series of operation | movement from connecting a surface emitting panel to the light-emitting device based on 1st Example until supplying electric power to a surface emitting panel. It is a flowchart explaining a series of operation | movement from connecting a surface emitting panel to the light-emitting device based on 1st Example until supplying electric power to a surface emitting panel. It is a block diagram which shows the outline of the light emission system which concerns on 2nd Example.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. The drawings used to describe the embodiments schematically show the light-emitting device and the light-emitting system according to the present invention, and are partially emphasized, enlarged, reduced, or omitted for better understanding. In some cases, it does not accurately represent the scale or shape of each component. Furthermore, the various numerical values used in the embodiments are only examples, and can be variously changed as necessary.

<First embodiment>
(Configuration of light emitting device)
FIG. 1 is a block diagram illustrating an outline of the light emitting device according to the present embodiment. As shown in FIG. 1, the light emitting device 1 includes two independent surface emitting panels 2, a power supply unit 4, a light emission control unit 5, and an operation unit 6. In the light emitting device 1 according to the present embodiment, each surface light emitting panel 2 has a unique control ID. The light emission control unit 5 includes a storage unit 5a in which an information table having the control ID and control information corresponding to the control ID is stored. The light emission control unit 5 controls the light emission state of the surface light emitting panel 2. Specifically, the light emission control part 5 acquires control ID from the surface emitting panel 2, and reads the control information corresponding to this control ID from the information table preserve | saved at the memory | storage part 5a. In the present embodiment, the firmware is in the light emission control unit 5, generates a control signal for obtaining the light emission characteristics specified by the operation signal input from the operation unit 6 based on the control information, and the light emission control unit 5 A control signal is generated for the power supply unit 4. The power supply unit 4 supplies power corresponding to the control signal to the surface emitting panel 2. Thereby, each surface light emission panel 2 light-emits independently according to the control signal of the light emission control part 5, and the light which has a desired light emission characteristic (luminance and chromaticity) is radiated | emitted.

  In addition, although the light-emitting device of a present Example has the two surface light emission panels 2, the number of the surface light emission panels which the surface light-emitting device of this invention has may be one or three or more. Further, in the light emitting device of this embodiment, the information table is stored in the storage unit 5a of the light emission control unit, but the information table according to the present invention is stored in other parts in the light emitting device of the present invention. Alternatively, it may be stored in an external storage medium. Further, in the light emitting device of this embodiment, the light emission control unit 5 has firmware and performs control based on the operation signal from the operation unit 6, but the firmware of the light emitting device of the present invention has the light emission control unit 5. The operation unit 6 is not an indispensable part.

  Hereinafter, each member and the control ID will be described in detail, and a method for controlling light emission in the surface light emitting panel 2 will also be described.

(Surface emitting panel)
The structure of the surface light emitting panel 2 will be described in detail with reference to FIGS. FIG. 2 is a perspective view of the surface light-emitting panel 2 constituting the light-emitting device 1 of the present embodiment. FIG. 3 is a top view of the surface light emitting panel 2. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  In the present embodiment, the surface light-emitting panel 2 is an organic EL surface light-emitting panel including a plurality of organic electroluminescence (organic EL) light-emitting elements. In addition, the surface emitting panel 2 which concerns on this invention is not restricted to this, The surface emitting panel which combined inorganic EL surface emitting panel or inorganic LED, and the light-guide plate may be sufficient.

  As shown in FIGS. 2 to 4, each surface light emitting panel 2 includes a transparent substrate 11, an organic EL light emitting element 12, a light diffusion layer 13, and a sealing layer 14. The organic EL light emitting element 12 is classified into three types: an organic EL light emitting element 12R whose emission color is red, an organic EL light emitting element 12G whose emission color is green, and an organic EL light emitting element 12B whose emission color is blue. The

In the present embodiment, the transparent substrate 11 is a glass substrate. The transparent substrate 11 is
Any substrate that transmits light emitted from the organic layer may be used. For example, the substrate may be composed of a transparent resin film such as ceramics, polyester, polymethacrylate, polycarbonate, or polyether sulfone.

  As a more specific configuration of the surface light emitting panel 2, a plurality of organic EL light emitting elements 12R and a plurality of organic EL light emitting elements 12G are provided on one surface (hereinafter referred to as “first surface”) 11a of the transparent substrate 11. And a plurality of organic EL light emitting elements 12B are arranged in parallel in a striped manner apart from each other. These organic EL light emitting elements are repeatedly arranged in the order of the organic EL light emitting elements 12R, 12G, and 12B. With such a configuration, red light emitted from the plurality of organic EL light emitting elements 12R, green light emitted from the plurality of organic EL light emitting elements 12G, and blue light emitted from the plurality of organic EL light emitting elements 12B. The light is synthesized and the combined light of uniform color is emitted from one surface light emitting panel 2 as a whole. The number of each of the organic EL light emitting elements 12R, 12G, and 12B that emit light of each color may be one, but the area of the light emitting surface is increased and the luminance of the surface light emitting panel 2 is increased. When mixing light, it is preferable to arrange many organic EL light emitting elements 12R, 12G, and 12B in parallel. Further, the organic EL light emitting device according to the present invention is not limited to a stripe shape.

  As shown in FIG. 4, the organic EL light emitting element 12R whose emission color is red is an anode (transparent electrode) 15R formed on the first surface 11a of the transparent substrate 11, and an organic layer formed on the anode 15R. The cathode (metal electrode) 17R sandwiches the organic layer 16R in pairs with the anode 16R and the anode 15R. Similarly, the organic EL light emitting element 12G whose emission color is green includes an anode (transparent electrode) 15G formed on the first surface 11a of the transparent substrate 11, an organic layer 16G formed on the anode 15G, and an anode. It is composed of a cathode (metal electrode) 17G that forms a pair with 15G and sandwiches the organic layer 16G. The organic EL light emitting element 12B whose emission color is blue is paired with the anode (transparent electrode) 15B formed on the first surface 11a of the transparent substrate 11, the organic layer 16B formed on the anode 15B, and the anode 15B. And a cathode (metal electrode) 17B sandwiching the organic layer 16B. In addition, when any of the anodes 15R, 15G, and 15B is not specified, it is also simply referred to as the anode 15, and when any of the organic layers 16R, 16G, and 16B is not specified, it is also simply referred to as the organic layer 16 and the cathode 17R. , 17G, and 17B are also simply referred to as the cathode 17 when not specified. That is, in the present embodiment, the anode 15, the organic layer 16, and the cathode 17 constituting each organic EL light emitting element 12 are sequentially laminated on the first surface 11 a of the transparent substrate 11.

  In this embodiment, the anode 15 is made of indium tin oxide (ITO). The anode 15 has a function of injecting holes into the organic layer 16, and is transparent to light of each color in the organic layer 16. That is, the anode 15 functions as a transparent electrode. The anode 15 is formed by a sputtering method, a vacuum deposition method, or the like. It is preferable to perform ultraviolet irradiation or ozone treatment in order to remove impurities adhering to the anode 15 after forming the anode 15 and adjust the ionization potential to improve the hole injection property.

  The anode 15 of the organic EL light emitting device according to the present invention is not limited to being composed of indium tin oxide, and has a function of injecting holes into the organic layer 16, and the organic layer 16. If it has transparency with respect to light emission of each color, for example, it may be composed of a metal oxide such as indium zinc oxide, a conductive polymer such as poly (3-methylthiophene), polypyrrole, or the like. The anode 15 may be made of a different material for each of the organic EL light emitting elements 12R, 12B, and 12G, may be made of the same material, or a large electrode is shared by a plurality of organic EL light emitting elements. May be.

  Although not shown in FIG. 4, the organic layer 16 has a structure in which a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer are stacked in this order from the anode 15 side. Is preferred. The hole injection layer and the hole transport layer are preferably formed from a hole transport material, and examples of the hole transport material include aromatic amine derivatives, phthalocyanine derivatives, porphyrin derivatives, oligothiophene derivatives, polythiophene derivatives. , A benzylphenyl derivative, a compound in which a tertiary amine is linked with a fluorene group, a hydrazone derivative, a silazane derivative, a silanamine derivative, a phosphamine derivative, a quinacridone derivative, a polyaniline derivative, a polypyrrole derivative, a polyphenylene vinylene derivative, a polythienylene vinylene derivative, a polyquinoline derivative, Examples thereof include polyquinoxaline derivatives and carbon. The electron transport layer is preferably formed of an electron transport material. Examples of the electron transport material include metal complexes such as an aluminum complex of 8-hydroxyquinoline, 10-hydroxybenzo [h] quinoline, and the like. Metal complexes, oxadiazole derivatives, distyryl biphenyl derivatives, silole derivatives, 3-hydroxyflavone metal complexes, 5-hydroxyflavone metal complexes, benzoxazole metal complexes, benzothiazole metal complexes, trisbenzimidazolylbenzene, quinoxaline compounds, phenanthroline derivatives 2-t-butyl-9,10-N, N′-dicyanoanthraquinone diimine, n-type hydrogenated amorphous silicon carbide, n-type zinc sulfide, n-type zinc selenide and the like. The electron injection layer is preferably made of a metal having a low work function. Examples of the metal having a low work function include alkali metals such as sodium and cesium, and alkaline earth metals such as barium and calcium.

The following are mentioned as a luminescent material used for the said light emitting layer. Examples of the light-emitting material that gives red light emission include DCM (4- (dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran) compounds, benzopyran derivatives, rhodamine derivatives, benzothioxanthene derivatives, aza Examples include benzothioxanthene. Examples of the light emitting material that gives green light emission include quinacridone derivatives, coumarin derivatives, and aluminum complexes such as Al (C ₉ H ₆ NO) ₃ . Furthermore, examples of the light emitting material that gives blue light emission include naphthalene, perylene, pyrene, anthracene, coumarin, p-bis (2-phenylethenyl) benzene, and derivatives thereof. In addition, any one kind may be used for the luminescent material mentioned above, and two or more types may be used together by arbitrary combinations and ratios.

  In this embodiment, since the anode 15 has light transmittance, the cathode 17 does not necessarily have light transmittance, and is made of aluminum. That is, the cathode 17 is a metal electrode. The cathode 17 is formed by a sputtering method, a vacuum evaporation method, or the like. The cathode 17 is not limited to being made of aluminum, and for example, an appropriate metal such as tin, magnesium, indium, calcium, silver, or an alloy thereof may be used. Specific examples include alloy electrodes having a low work function such as a magnesium-silver alloy, a magnesium-indium alloy, and an aluminum-lithium alloy.

  In this state where the organic EL light emitting elements 12 are juxtaposed, red, green, and blue light are emitted from the organic EL light emitting elements 12R, 12G, and 12B. Here, for example, by adjusting the light emission amounts of red light, green light, and blue light, the surface opposite to the first surface 11a of the transparent substrate of the surface-emitting panel 2 (hereinafter referred to as “second surface”). It is possible to make white light appear to be emitted from 11b. It is also possible to make it appear that light of a color other than white light is emitted by adjusting the amount of light emitted from red light, green light, and blue light. It is possible to obtain a surface-emitting panel 2 that can be toned.

  As shown in FIG. 4, the sealing layer 14 has a function of covering each organic EL light emitting element 12 and preventing the light emitting material of each organic EL light emitting element 12 from being oxidized and deteriorated by oxygen in the atmosphere. In the present embodiment, the sealing layer 14 is an epoxy resin having light transparency. The sealing layer 14 may be other transparent resin having light transmissivity such as a silicone resin in addition to the epoxy resin.

  Moreover, the sealing layer 14 is not limited to being comprised from resin as mentioned above. For example, the sealing layer 14 may be a light transmissive member such as glass that entirely covers the plurality of organic EL light emitting elements 12.

  As shown in FIG. 4, the light diffusion layer 13 is formed so as to cover the entire second surface 11 b of the transparent substrate 11. The light diffusion layer 13 has an effect of diffusing the light of each color emitted from the organic EL light emitting element 12 and mixing the colors uniformly. Due to such an effect, the surface light emitting panel 2 in the present embodiment can function as a single color light source. In this embodiment, the light diffusion layer 13 is composed of a film in which fine particles are dispersed in a transparent resin. In addition, the light-diffusion layer 13 is not limited to such a film, For example, it can form by roughening the substrate surface.

  As described above, the transparent substrate 11 has a characteristic of transmitting the light of each color emitted from each organic EL light emitting element 12, and as a result, as shown in FIG. The light passes through the transparent substrate 11 and the light diffusion layer 13 and is emitted from the radiation surface side of the surface emitting panel 2 to the outside.

  In the embodiment described above, each of the surface light emitting panels 2 includes three types of organic EL light emitting elements 12 (an organic EL light emitting element 12R that emits red light, an organic EL light emitting element 12G that emits green light, and an organic EL light emitting that emits blue light). Although provided with the element 12B), it is not limited to this. For example, you may comprise the surface emitting panel 2 from the two types of organic EL light emitting elements 12 selected from the three types of organic EL light emitting elements 12R, 12G, and 12B. Even in this case, the light emitted from the surface light emitting panel 2 can be toned.

  As shown in FIG. 1, in the present embodiment, each surface emitting panel 2 includes a storage unit 2 a that stores an identification ID and a control ID. In the present embodiment, the storage unit 2a is composed of a semiconductor memory device composed of a plurality of semiconductor elements, and can store the identification ID and the control ID by holding the charges in the plurality of semiconductor elements. In addition, the memory | storage part 2 is not restricted to such a semiconductor memory device, The magnetic memory device which memorize | stores identification ID and control ID as magnetic information, or the optical memory device which memorize | stores identification ID and control ID as optical information It may be. The storage unit 2a may be an electronic device such as an IC tag that can transmit and receive an identification ID and a control ID without contact. Although not shown in FIGS. 2 to 4, the storage unit 2 a may be provided on either the first surface 11 a or the second surface 11 b of the transparent substrate 11.

  The identification ID is an ID unique to each surface light emitting panel 2 used to identify the two surface light emitting panels 2 constituting the light emitting device 1, and each surface light emitting panel 2 is assigned a different identification ID. Has been. For example, each surface-emitting panel 2 is given a serial number identification ID or an identification ID such as an alphabet. Thus, by providing different identification IDs to each of the surface light emitting panels 2, the light emission control unit 5 can instruct supply of power specific to each of the surface light emitting panels 2 using the identification ID. . In addition, identification ID in a present Example is not essential information for the surface emitting panel which concerns on this invention. That is, in this embodiment, the light-emitting device 1 has two surface light-emitting panels 2, but when the light-emitting device of the present invention has only one surface light-emitting panel, an identification ID is assigned to the surface light-emitting panel. May not be given. Similarly, even when the light emitting device of the present invention has two or more surface light emitting panels, it is necessary to change the control conditions for each surface light emitting panel, such as when the same type of surface light emitting panel is attached to the light emitting device at the same time. Even when there is no ID, the identification ID may not be given.

  The control ID is an ID configured from manufacturing information of the surface emitting panel 2. Specifically, in this embodiment, as shown in FIG. 5, the control ID is composed of an 8-digit character string, the first digit is an arbitrary uppercase alphabet, indicating the manufacturer code, The digit is an arbitrary lower case alphabet and indicates the product number code, the third to sixth digits are arbitrary numbers and indicate the production lot code as a whole (in four digits), and the seventh digit is optional Uppercase Greek letters indicate the manufacturing location code, and the eighth digit is an arbitrary lowercase Greek letter indicating the inspection data code. Hereinafter, in the present embodiment, the manufacturing information of the surface light emitting panel 2 will be described as information including the manufacturer of the surface light emitting panel 2, a product number, a manufacturing lot, a manufacturing place, and inspection data.

  The manufacturer code in the first digit is a code indicating the manufacturer of the surface light emitting panel 2, and is a code predetermined for each manufacturer. That is, the manufacturer code of any one manufacturer is A, and the manufacturer code of another manufacturer is B. The light emission control unit 5 recognizes the manufacturer code from the control ID given to each surface light emitting panel 2, so that there are many manufacturers of the surface light emitting panels 2 mounted on the light emitting device 1. Can also identify the manufacturer.

  The product number code of the second digit is a code indicating the product number of the surface light emitting panel 2, and corresponds to the product number uniquely determined by each manufacturer of the surface light emitting panel 2. That is, the product number code of a surface light emitting panel of an arbitrary type is defined as a, and the product number code of another type of surface light emitting panel is defined as b. When the same manufacturer manufactures a plurality of types of surface light emitting panels 2 having different shapes or characteristics by recognizing the product number code from the control ID given to each surface light emitting panel 2 by the light emission control unit 5 Even so, the product number of the surface-emitting panel 2 mounted on the light-emitting device 1 can be specified.

  The production lot code shown in the 3rd to 6th digits is a code indicating the date of manufacture of the surface emitting panel 2, and the 3rd and 4th digits indicate the year of manufacture, and the 5th digit. The sixth digit indicates the manufacturing month. In particular, in the third digit and the fourth digit, the last two digits of the year of manufacture are displayed. For example, the manufacturing lot code of the surface emitting panel 2 manufactured in November 2011 is “1111”. Even the surface emitting panel 2 of the same product number manufactured by the same manufacturer may vary in characteristics for each manufacturing lot. Even in such a case, the light emission control unit 5 recognizes the production lot from the production lot code given to each surface light emitting panel 2, so that the same product manufactured by the same manufacturer with different dates From the light emitting panel 2, it becomes possible to easily grasp the characteristics of the surface emitting panel 2 mounted on the light emitting device 1 for each production lot. The production lot code is not limited to a four-digit code for displaying the production date, and the number of digits of the production lot code may be increased or decreased so that the production date can be specified.

  The seventh place manufacturing place code is a code indicating the manufacturing place of the surface light emitting panel 2, and is a code corresponding to the manufacturing country, region or factory uniquely determined by each manufacturer of the surface light emitting panel 2. For example, the manufacturing location code of an arbitrary manufacturing country is Γ (gamma), and the manufacturing location code of another manufacturing country is Σ (sigma). Even in the case of the surface emitting panel 2 manufactured by the same manufacturer with the same product number at the same time, the characteristics may vary depending on the manufacturing location. Even in such a case, the light emission control unit 5 recognizes the manufacturing location from the manufacturing location code assigned to each surface light emitting panel 2, thereby manufacturing the surface light emitting panel 2 mounted on the light emitting device 1. It becomes possible to easily grasp the characteristics of each place.

  The inspection data code of the eighth digit is a code indicating the inspection result at the time of shipment of the surface emitting panel 2, and each manufacturer of the surface emitting panel 2 corresponds to the result of the characteristic inspection at the time of shipment of the surface emitting panel 2. It is a code to be granted. For example, when a standard reference value of the luminance of light emitted from the surface emitting panel 2 is determined when a predetermined power is supplied, the predetermined power is supplied and the luminance is within ± 10% of the standard reference value The inspection data code of the surface light emitting panel capable of obtaining the above is α (alpha), and the predetermined power is supplied to obtain a luminance within + 10% to + 30% of the standard reference value. The inspection data code is β (beta), and the inspection data code of the surface-emitting panel capable of obtaining the luminance within −10% to −30% of the standard reference value by supplying the predetermined power is γ (gamma) ) And so on. Even in the same product surface emitting panel 2 manufactured at the same place by the same manufacturer at the same time, the characteristics may vary due to various factors in the manufacturing process. Even in such a case, the light emission control unit 5 recognizes the inspection result from the inspection data code given to each surface light emitting panel 2, so that the surface light emitting panel 2 mounted on the light emitting device 1 can be controlled. It becomes possible to easily grasp the characteristics.

  In this embodiment, the manufacturer, product number, production lot, production location, and inspection data can be recognized by the 8-digit control ID. For example, data such as materials used for the surface light emitting panel 2 may be added. Further, it is not always necessary to be able to recognize all the items described above. It is preferable that the manufacturer can be recognized by the control ID according to the present invention. Moreover, the character which shows each code | cord is not limited to what was mentioned above, It can change suitably.

  In the present embodiment, the control ID and the identification ID are binarized and are held as electric charges in the semiconductor element constituting the storage unit 2a. For this reason, an error correction code may be further included in the control ID and the identification ID.

  Next, the circuit configuration of the surface emitting panel 2 will be described with reference to FIG. FIG. 6 is an electric circuit diagram showing a connection relationship between one surface emitting panel 2, the power supply unit 4, and the light emission control unit 5 in the light emitting device 1 of the present embodiment.

  As shown in FIG. 6, the surface light emitting panel 2 includes a red light emitting element group 21 including a plurality of organic EL light emitting elements 12 </ b> R that emits red light, and a plurality of organic EL light emitting elements 12 </ b> G that emits green light. The green light emitting element group 22 includes a blue light emitting element group 23 including a plurality of organic EL light emitting elements 12B that emit blue light. In FIG. 6, the organic EL light emitting elements 12R, the organic EL light emitting elements 12G, and the organic EL light emitting elements 12B are juxtaposed in order to easily show the circuit configuration. As shown, the organic EL light emitting element 12R, the organic EL light emitting element 12G, and the organic EL light emitting element 12B are juxtaposed in this order.

  As shown in FIG. 6, the anode 15 that is the anode of the organic EL light emitting element 12 is connected to the power supply unit 4, and the cathode 17 that is the cathode of the organic EL light emitting element 12 is grounded (that is, connected to the ground potential). Have been). The anodes (anodes 15) of the organic EL light emitting elements 12R are electrically connected. That is, the organic EL light emitting elements 12R are connected in parallel. Similarly, the anodes (anodes 15) of the organic EL light emitting elements 12G are electrically connected, and the organic EL light emitting elements 12G are connected in parallel. The anodes (anodes 15) of the organic EL light emitting elements 12B are electrically connected, and the organic EL light emitting elements 12B are connected in parallel.

(Power supply unit)
Next, the power supply unit 4 will be described with reference to FIGS. 1 and 6. The power supply unit 4 is a circuit that supplies power to the surface light emitting panel 2, and the power supply unit 4 controls the surface light emitting panel 2 from a central processing arithmetic circuit (CPU) 5 c described later of the light emission control unit 5. Power is supplied according to the signal. In this embodiment, the power supply unit 4 is provided in the light emission control unit 5, but may be provided outside the light emission control unit 5. May be stored so as to be incorporated into The power supply unit 4 may be used as a circuit integrated with the light emission control unit 5.

  As shown in FIG. 6, the power supply unit 4 of the present embodiment includes a plurality of n-channel MOS transistors (hereinafter referred to as nMOS) 24. Three nMOSs 24 are connected to one organic EL surface light emitting panel 2. Specifically, one nMOS 24 is connected to the plurality of organic EL light emitting elements 12R (that is, the red light emitting element group 21), and one nMOS 24 is connected to the plurality of organic EL light emitting elements 12G (that is, the green light emitting element group 22). One nMOS 24 is connected to the plurality of organic EL light emitting elements 12B (that is, the blue light emitting element group 23). Hereinafter, the nMOS 24 connected to the organic EL light emitting element 12R is also referred to as an nMOS 24R, the nMOS 24 connected to the organic EL light emitting element 12G is also referred to as an nMOS 24G, and the nMOS 24 connected to the organic EL light emitting element 12B is also referred to as an nMOS 24B. In addition, in order to make each surface emitting panel 2 light-emit independently, each surface emitting panel 2 is not connected to the same nMOS24. Accordingly, although three nMOSs 24 are illustrated in FIG. 6, in reality, the power supply unit 4 of the light emitting device 1 according to the present embodiment has an nMOS whose quantity is three times the quantity of the organic EL surface emitting panel 2. It is composed of

  As a more specific connection relationship, each gate electrode of the nMOS 24 is connected to the central processing arithmetic circuit 5 c of the light emission control unit 5, each source electrode of the nMOS 24 is connected to each anode of the organic EL light emitting element 12, and The drain is connected to the external power supply voltage Vcc.

  In each of the surface light emitting panels 2 according to the present example, a plurality of organic EL light emitting elements 12R are combined into one red light emitting element group 21, a plurality of organic EL light emitting elements 12G are combined into one green light emitting element group 22, and a plurality of organic light emitting elements are combined. Although the EL light emitting element 12B is controlled as one blue light emitting element group 23, the light emitting device of the present invention and the control method of the light emitting device of the present invention are not limited to this. For example, the plurality of organic EL light emitting elements 12R may be divided into a plurality of light emitting element groups. Similarly, the plurality of organic EL light emitting elements 12G and the plurality of organic EL light emitting elements 12B may be divided into a plurality of light emitting element groups.

  In the above-described embodiment, the light emission control unit 5 adjusts the light emitted from the surface light emitting panel by changing the gate voltage supplied to the nMOS 24. However, the present invention is not limited to this. For example, the light emission control unit 5 may adjust the light emission intensity of the organic EL light emitting elements 12R, 12G, and 12B by supplying different gate voltages for each nMOS 24 so as to change the on / off duty ratio in each nMOS 24. .

(Light emission control unit)
Next, the light emission control unit 5 will be described with reference to FIGS. 1 and 6 to 8. The light emission control unit 5 controls the light emission state of the surface light emitting panel 2. The light emission control unit 5 includes a panel connection unit 5b having a function of acquiring an identification ID and a control ID held by the surface light emitting panel 2, and a nonvolatile information table storing control information corresponding to the control ID and the control ID. And a central processing circuit (CPU) 5c, which is a circuit for generating a control signal to the power supply unit 4 based on the control information. . As described above, when the identification ID and the control ID are directly acquired from the surface light emitting panel 2, a reading device for reading the identification ID and the control ID from the IC tag may be provided in the light emission control unit 5.

  Next, the panel connection portion 5b will be described with reference to FIG. As shown in FIG. 1, the light emission control part 5 is provided with the two panel connection parts 5b. In addition, the number of the panel connection part 5b is not limited to two, One may be sufficient and three or more may be sufficient. The panel connection part 5b has an insertion port for inserting a part of the surface light emitting panel 2, and a connection for electrical connection with a connection terminal of the surface light emitting panel 2 is provided inside the insertion port. Terminals are provided. In addition, an acquisition device for acquiring an identification ID and a control ID held by the surface light emitting panel 2 is provided inside the insertion slot. Note that the panel connection portion 5b may include a jig for holding and fixing the light emitting panel 2.

  With such a configuration, when the surface light emitting panel 2 is fitted into the insertion slot, the surface light emitting panel 2 and the panel connecting portion 5b are electrically connected, and the identification device of the surface light emitting panel 2 and The control ID is acquired by the light emission control unit 5. In the present embodiment, the acquisition device stores the memory of the surface light emitting panel 2 via the electrical signal wiring that is electrically connected to the storage unit 2a of the surface light emitting panel 2 by fitting the surface light emitting panel 2 into the insertion port. The identification ID and control ID stored in the unit 2a can be acquired.

  In addition, when the recording method of identification ID and control ID in the memory | storage part 2a of the surface emitting panel 2 is a magnetic or optical system, it is good also considering the acquisition apparatus mentioned above as a magnetic head or an optical head. Furthermore, when the memory | storage part 2a of the surface emitting panel 2 is comprised from the IC tag, you may use the electromagnetic wave transmission / reception apparatus which enables wireless communication as an acquisition apparatus mentioned above.

  As shown in FIG. 1, the power supply unit 4 in this embodiment is electrically connected to the panel connection unit 5 b in the light emission control unit 5, and a control signal from the central processing circuit 5 c of the light emission control unit 5. Is supplied to each organic EL surface-emitting panel 2. With such a configuration, when the organic EL surface light emitting panel 2 is fitted into the insertion port of the panel connection portion 5b, the organic EL surface light emitting panel 2 and the panel connection portion 5b are electrically connected, and the power supply portion 4 connects to the panel. It becomes possible to supply desired power to the organic EL surface-emitting panel 2 via the connection portion 5b. It is not always necessary to supply power to the organic EL surface light emitting panel 2 via the panel connection portion 5b. The power supply portion 4 and the organic EL surface light emitting panel 2 are directly and electrically connected to each other. You may supply to the organic electroluminescent surface emitting panel 2 from the electric power supply part 4 not via 5b.

  Further, the panel connection unit 5b is not necessarily provided inside the light emission control unit 5 as long as it functions integrally with the light emission control unit 5, and is located away from the light emission control unit 5, and has an identification ID and control. The ID may be transmitted to the light emission control unit 5.

  As shown in FIG. 7, the information table stored in the storage unit 5a of the light emission control unit 5 includes a plurality of control IDs and control information corresponding to the control IDs. In this embodiment, the central processing circuit 5c of the light emission control unit 5 reads the control information corresponding to the control ID from the information table stored in the storage unit 5a, and inputs the operation signal input from the operation unit 6 and the control signal. Based on the control information, the power supplied from the power supply unit 6 to the surface light emitting panel 2 is calculated.

  In the case of the information table of the present embodiment, the control table has a control ID and a control information corresponding to the control ID for a surface light emitting panel that can be replaced other than the surface light emitting panel 2 included in the light emitting device 1 of the present embodiment. . Accordingly, it is possible to cope with the case where the surface light emitting panel 2 according to the present embodiment is replaced with the surface light emitting panel that can be replaced. In addition, when the information table is composed of a plurality of control IDs and control information corresponding to each control ID, it is possible to cope with the case where the light emitting device of the present invention has two or more types of surface light emitting panels having different control IDs. It becomes.

  Control information corresponding to each control ID is assigned to each control ID. Further, in the present embodiment, when the light emission control unit 5 cannot read the control information corresponding to the control ID of the surface light emitting panel 2 (for example, stored in the storage unit 2a of the surface light emitting panel 2) in the information table. For example, when there is no control ID that matches the control ID in the information table or when the light emission control unit 5 cannot acquire the control ID stored in the storage unit 2a of the surface light emitting panel 2). “Standard control information” used instead of the control information corresponding to the control ID for the light emitting panel 2 is stored. Note that the control information assigned to each control ID does not have to be all different, and there may be many identical control information.

  As shown in FIGS. 7 and 8, in this embodiment, the control information is composed of a 5-digit character string. The first to third digits are arbitrary numbers and indicate the correction value code as a whole (in three digits), and the fourth to fifth digits are arbitrary numbers and are the maximum supply to be supplied to the surface emitting panel 2 Current is shown.

  As for the correction value code shown in the first to third digits, a signal requesting the luminance and chromaticity of the light emitted from the surface light emitting panel 2 is supplied from the operation unit 6 to the light emission control unit 5 as an operation signal. Is a code indicating a correction value for correcting the supply current to the surface emitting panel 2 calculated from the operation signal. That is, the central processing circuit 5c of the light emission control unit 5 adds a correction based on the correction value indicated by the correction code to the operation signal from the operation unit 6, and calculates the current supplied to the surface light emitting panel 2. . Specifically, for example, the correction value code whose first to third digits are “090” is corrected by multiplying the correction value 90%, that is, the supply current calculated from the operation signal by 0.9. Show. Further, the correction value code whose first to third digits are “100” is corrected by multiplying the correction value by 100%, that is, the supply current calculated from the operation signal (in this case, in other words, If it does, it will not be corrected). Furthermore, the correction code whose first to third digits are “120” indicates that the correction value is 120%, that is, the supply current calculated from the operation signal is multiplied by 1.2.

  The maximum supply current in the fourth to fifth digits indicates the maximum current that can be supplied to the surface light emitting panel 2, and each maximum supply current corresponds to the maximum supply current determined in advance for each control ID. Yes. In the present embodiment, as shown in FIG. 8, the maximum supply current is constituted by a two-digit numerical value representing a digital value used by the central processing circuit 5c for current control.

  The central processing circuit 5c of the light emission control unit 5 determines whether or not the current corrected based on the correction value indicated by the correction code described above exceeds the maximum supply current. When the corrected current does not exceed the maximum supply current, the central processing circuit 5c of the light emission control unit 5 generates a control signal based on the corrected current and supplies the power supply unit 4 as a gate signal. Supply. On the other hand, when the corrected current exceeds the maximum supply current, the central processing circuit 5c of the light emission control unit 5 generates a control signal based on the maximum supply current and supplies the gate signal to the power supply unit 4. Supply as. Thereby, an excessive current supply to the surface light emitting panel 2 that causes a failure or the like is prevented, and the surface light emitting panel 2 can be appropriately driven.

  In this embodiment, as described above, when the light emission control unit 5 cannot read the control information corresponding to the control ID of the surface light emitting panel 2, the light emission control unit 5 stores the standard control information stored in the information table. Is read. The standard control information is control information that can be used in common for any type of surface-emitting panel 2. In this embodiment, the control information indicating the standard control information is “10050”. Here, the correction value code “100” is an average correction value of the various surface-emitting panels 2, and the current indicated by the maximum supply current “50” is the same regardless of which type of the surface-emitting panel 2 is used. The current is such that the light emitting device 1 can be driven safely without failure. For this reason, when the light emission control unit 5 cannot read the control information corresponding to the control ID of the surface light emitting panel 2, the current supplied to the surface light emitting panel 2 is determined by using the standard control information. Thus, even when the characteristics of the surface light emitting panel 2 mounted on the light emitting device 1 are unknown, the light emitting device 1 can be safely driven without causing a failure.

  The control information corresponding to each control ID is determined by performing in advance a characteristic evaluation on the surface light emitting panel 2 to which the control ID is assigned. That is, the characteristic evaluation is performed for the surface emitting panels 2 to which different control IDs are assigned, and an information table is created based on the characteristic evaluation result. Therefore, if the characteristic evaluation results are the same even if the control IDs are different, the control information corresponding to the control ID will be the same.

  The information table may be a unique table corresponding to the light emission control unit 5 (for example, the manufacturer, product number, production lot, or production location of the light emission control unit 5). In such a case, the characteristics of each surface light emitting panel 2 are evaluated for each light emission control unit 5 to create an information table, and the information table is stored in the storage unit 5a of each light emission control unit 5. . By doing in this way, optimal control information can be acquired according to the combination of the surface light emission panel 2 and the light emission control part 5, and the compatibility of the surface light emission panel 2 and the light emission control part 5 can be improved. .

  In the present embodiment, the above-described information table can be updated based on update information supplied from the outside of the light emitting device 1. For example, the light emission control unit 5 may acquire the update information from an external storage medium such as a memory card or various disks in which the update information is stored, and update the information table. In such a case, the light emission control unit 5 is provided with a reading device for reading the update information of the external storage medium. Alternatively, the information table in the storage unit 5a may be updated by providing a writing function in the light emission control unit 5 and rewriting the identification ID and the control ID directly from the operation unit 6. In such a case, in response to the operation signal supplied from the operation unit 6, the light emission control unit 5 transmits an instruction signal for performing the rewriting to the panel connection unit 5b.

  In the present embodiment, the control information is composed of the correction value code and the maximum supply current. However, the present invention is not limited to such a configuration, and the control information according to the present invention corresponds to at least each control ID. It is sufficient that the information is configured to include information for appropriately causing the surface light emitting panel 2 to emit light. Specifically, the control information according to the present invention is preferably configured from information representing a relationship between at least one of power, voltage, and current and the luminance of the surface light emitting panel 2. More specifically, a parameter (for example, a digital signal value sent to the power supply unit 4) for determining the power, voltage, or current supplied to the surface light emitting panel 2 based on the operation signal input from the operation unit 6 is used. There may be. In the above-described embodiment, the example in which the current proportionality coefficient is used as the control information has been described. However, as the control information, a non-linear coefficient or a coefficient subdivided for each current value may be set. In addition, a temperature correction parameter may be included in the parameter, and the power supplied to the surface light emitting panel 2 may be changed according to the temperature state of the surface light emitting panel 2. In such a case, it is necessary to install a temperature sensor in the light emitting device 1 or to enable the light emitting device 1 to acquire temperature information from the temperature sensor. Furthermore, the deterioration deterioration correction parameter may be included in the parameter, and the power supplied to the surface light emitting panel 2 may be changed according to the total light emission time of the surface light emitting panel 2. In such a case, it is necessary to provide the light emitting device 1 with a counter for counting the light emission time of the light emitting panel 2. The control information includes the toning specifications of the surface emitting panel 2 (single color emission, RGB toning, RGB emission ratio, or other specifications), the panel size, or the panel shape. You can also enter information about the type.

  The control information is not limited to the correction value code for the supply current as described above, and may be a physical quantity itself such as a supply power value or a supply voltage value to the surface light emitting panel 2. Further, the control information regarding the maximum supply current may be a maximum supply power or a maximum supply voltage instead of the maximum supply current.

  In the present embodiment, the information table is stored in the storage unit 5 a in the light emission control unit 5, but may be stored in a storage unit provided separately from the light emission control unit 5 in the light emitting device 1. In such a case, the light emission control unit 5 reads the control information corresponding to the control ID from the information table stored in the storage unit. Here, the light emission control unit 5 and the storage unit may be electrically connected, or the light emission control unit 5 may read the information table by wireless communication.

  Thus, in this embodiment, although the two surface light emitting panels 2 are mounted in the light emitting device 1, each surface light emitting panel 2 has a unique identification ID. The central processing circuit 5c can determine an appropriate power corresponding to each surface emitting panel 2 based on the identification ID and the control ID. Thereby, appropriate electric power can be supplied to each surface emitting panel 2.

(Operation section)
In the present embodiment, the operation unit 6 is an information input device including, for example, a keyboard, a switch, a voice input device, or a touch panel, and is connected to the light emission control unit 5 by a wired or wireless line. In the present embodiment, when the operator operates the operation unit 6, the state of the light emitting device 1 can be known through the light emission control unit 5, the power of the light emitting device 1 is turned on and off, and each surface emitting panel 2. In contrast, luminance adjustment and chromaticity adjustment can be performed. That is, when the operator operates the operation unit 6, an operation signal is supplied from the operation unit 6 to the light emission control unit 5. Further, the operation unit 6 may be provided with a display function for displaying the luminance and chromaticity of each surface emitting panel 2. The operation unit 6 may be incorporated in another electronic device such as a mobile phone or a personal computer, and may be shared with an operation unit of a home appliance such as a television, a refrigerator, or an air conditioner. For example, when the panel connection unit 5 b is provided outside the light emission control unit 5, the operation unit 6 may be integrated with the light emission control unit 5. As a specific example, a mobile phone or a personal computer can be used as the operation unit 6 and the light emission control unit 5. It is also possible for the operator to input the control ID from the operation unit 6.

  As described above, the operator may input the identification ID and the control ID of each surface light emitting panel 2 mounted on the light emitting device 1 by operating the operation unit 6. Thereby, for example, even when the light emission control unit 5 cannot acquire the identification ID and the control ID from the surface light emitting panel 2 due to poor contact between the surface light emitting panel 2 and the panel connecting portion 5b, the light emitting control unit 5 is appropriate for the surface light emitting panel 2. Electric power can be supplied.

  Further, the information table in the storage unit 5a may be updated when the operator operates the operation unit 6. Thereby, since the surface emitting panel 2 mounted on the light emitting device 1 is a new product, the same control ID as the control ID of the surface emitting panel 2 and the corresponding control information are stored in the information table in the storage unit 5a. Even if it does not exist, instead of using standard control information, it becomes possible to newly add the control ID and control information of the new product to the information table, and supply appropriate power to the new product. be able to.

In the light emitting device of the present invention, the operation unit 6 is not provided, and the light emission control unit 5 may automatically generate a control signal based only on the identification ID and the control ID supplied from the surface light emitting panel 2.
Further, the operation unit 6 is not provided, and the latest information table acquired from an external storage device (for example, a server) having an external storage medium for storing the information table using a communication line such as the Internet line is stored in the storage unit 5a. The information table may be updated.

(Control method)
Next, a method for controlling the surface light emitting panel 2 in the light emitting device 1 according to the present embodiment will be described with reference to FIGS. 1, 9, and 10. 9 and 10 are flowcharts for explaining a series of operations from connecting the surface light emitting panel 2 to the light emitting device 1 until supplying power to the surface light emitting panel 2. In the following description of the control method, it is assumed that the surface emitting panel 2 is connected to only one of the two panel connection portions 5b.

  First, the surface light emission panel 2 is connected to one of the two panel connection parts 5b (step S1). When the surface light emitting panel 2 is connected to the panel connection unit 5b, the identification ID and the control ID included in the surface light emitting panel 2 are transmitted from the surface light emitting panel 2 to the light emission control unit 5 (step S2). At that time, the central processing circuit 5c of the light emission control unit 5 determines whether or not the identification ID and the control ID of the surface light emitting panel 2 have been acquired (step S3). Usually, in the state where the surface light emitting panel 2 is mounted on the panel connection portion 5b as described above, the identification ID and the control ID are supplied to the light emission control portion 5 and stored in the storage portion 2a of the surface light emitting panel 2, and the light emission control is performed. The unit 5 acquires the identification ID and control ID of each surface emitting panel 2, and the process proceeds to step S4. However, when the light emission control unit 5 cannot acquire the identification ID and the control ID due to poor connection between the surface light emitting panel 2 and the panel connection unit 5b, the process proceeds to step S13.

  Next, when the light emission control unit 5 acquires the identification ID and the control ID, the central processing circuit 5c of the light emission control unit 5 determines whether or not the acquired control ID exists in the information table in the storage unit 5a. Is discriminated (step S4). Specifically, the central processing circuit 5c of the light emission control unit 5 refers to a plurality of control IDs in the information table stored in the storage unit 5a, and searches for a control ID that matches the acquired control ID. If the acquired control ID exists in the information table, the process proceeds to step S5. If the acquired control ID does not exist in the information table, the process proceeds to step S13.

  When the acquired control ID exists in the information table, the central processing circuit 5c of the light emission control unit 5 reads the control information corresponding to the acquired control ID (step S5). Specifically, the central processing circuit 5c of the light emission control unit 5 reads control information corresponding to the acquired control ID, which exists in the information table in the storage unit 5a.

  Next, the central processing circuit 5c of the light emission control unit 5 determines whether or not an operation signal has been received from the operation unit 6 (step S6). Specifically, when the operator of the light emitting device 1 operates the operation unit 6 to drive the light emitting device 1 (that is, to emit desired light from the surface light emitting panel 2), the central processing of the light emission control unit 5 is performed. The circuit 5 c receives an operation signal for radiating light of desired luminance and chromaticity from the surface light emitting panel 2 from the operation unit 6. Here, when the central processing circuit 5c of the light emission control unit 5 receives the operation signal, the process proceeds to step S7.

  When the central processing circuit 5c of the light emission control unit 5 receives the operation signal from the operation unit 6, the current supplied to the surface light emitting panel 2 is calculated based on the control information read in step S5 and the operation signal received in step S6. Is performed (step S7). Specifically, the current supplied to the surface light emitting panel 2 is calculated by multiplying the current calculated from the operation signal by the correction value indicated by the correction value code constituting the control information.

  When the current supplied to the surface light emitting panel 2 is calculated, the central processing circuit 5c of the light emission control unit 5 determines whether the calculated current exceeds the maximum supply current indicated by the maximum supply current constituting the control information. Is determined (step S8). Then, when the calculated current does not exceed the maximum supply current, the central processing circuit 5c of the light emission control unit 5 generates a control signal based on the calculated current (step S9) and calculates the calculated current. If it exceeds the maximum supply current, a control signal is generated based on the maximum supply current indicated by the maximum supply current (step S10).

  Next, the central processing circuit 5c of the light emission control unit 5 transmits the generated control signal to the power supply unit 4 (step S11). Specifically, in the present embodiment, the central processing circuit 5 c of the light emission control unit 5 applies a gate voltage as a control signal to the gate electrode of the nMOS 24 constituting the power supply unit 4. And if a control signal is transmitted to the power supply part 4 as a gate voltage, the electric power according to a control signal will be supplied from the power supply part 4 to the surface emitting panel 2 (step S12).

  However, if the central processing circuit 5c of the light emission control unit 5 cannot acquire the identification ID and the control ID in step S3, or the control ID acquired by the central processing circuit 5c of the light emission control unit 5 in step S4 is the information table. If not, the central processing circuit 5c of the light emission control unit 5 reads “standard control information” (step S13). Specifically, the light emission control unit 5 reads standard control information that is control information corresponding to the control ID “no matching data” in FIG. 7.

  When the central processing circuit 5c of the light emission control unit 5 reads the standard control information, the process proceeds to step S6, and the following process is the same as described above.

  In the description of the flowchart described above, it is assumed that the surface light emitting panel 2 is connected to only one of the two panel connection portions 5b. However, the surface light emitting panel 2 is connected to each of the two panel connection portions 5b. In this case, the central processing circuit 5c of the light emission control unit 5 determines the supply power while associating the identification ID with the control ID for each surface light emitting panel 2, whereby an appropriate voltage is applied to each surface light emitting panel 2. Will be supplied. That is, when the surface light emitting panel 2 is connected to each of the two panel connection portions 5b, electric power is supplied to each surface light emitting panel 2 based on the individual identification ID and control ID.

  With the configuration of the light emitting device and its control method as described above, in the light emitting device 1 according to this embodiment and its control method, the compatibility of the surface light emitting panel 2 and the light emitting device 1 having different characteristics is easily and inexpensively increased. be able to.

  In addition, since the light emitting device 1 and the control method thereof according to the present embodiment can deal with the surface light emitting panel 2 having a wide characteristic range, the yield at the time of manufacturing the surface light emitting panel 2 can be improved.

  Further, in the light emitting device 1 and the control method thereof according to the present embodiment, it is possible to appropriately respond to the new surface light emitting panel 2 put on the market after the light emitting device 1 is manufactured and supply appropriate power. it can.

<Second embodiment>
(Light emission system)
In the first embodiment, the information table is provided in the light emitting device 1, but in the light emitting system of the present invention, the information table may be stored in an external storage medium. Specifically, an information table may be provided in a server that can transmit and receive information to and from the light emitting device, and the light emitting device may access the server and read control information. Further, an information table may be provided in a server capable of transmitting / receiving information to / from a plurality of light emitting devices, and each light emitting device may access the server and read control information. A light-emitting system including such a plurality of light-emitting devices and servers will be described with reference to FIG. FIG. 11 is a block diagram illustrating an outline of the light emitting system according to the present embodiment.

  As shown in FIG. 11, a light emitting system 100 according to the present embodiment includes a server (external storage) connected to each of a plurality of light emitting devices 101 and each of the light emitting devices 101 via a communication line such as a LAN or WAN (for example, an Internet line). Device) 110. In FIG. 11, two light emitting devices 101 are illustrated, but the number can be appropriately changed according to the scale of the light emitting system 100.

  The light emitting device 101 includes a surface light emitting panel 2, an operation unit 6, a light emission control unit 105, and a communication unit 107. Here, the difference between the light emission control section 5 of the first embodiment and the light emission control section 5 of the present embodiment is that the light emission control section 5 of the first embodiment includes a storage section 5a in which an information table is stored. However, the light emission control unit 105 of this embodiment is not provided with a storage unit that stores an information table therein, and the other configurations are the same. In the present embodiment, the communication unit 107 includes a transceiver for enabling data transmission / reception with the server 110. The remaining configuration of the light emitting device 101 is the same as the configuration of the light emitting device 1 of the first embodiment, and a description thereof will be omitted.

  The server 110 includes a storage unit (external recording medium) 101a for storing the same information table as that in the first embodiment, and a communication unit 110b configured with a transceiver for enabling data transmission / reception with each light emitting device 101. ,have.

  In the present embodiment, when the surface light emitting panel 2 is connected to the panel connection unit 5b of the light emission control unit 105 and the central processing circuit 5c of the light emission control unit 105 acquires the control ID of the surface light emission panel 2, each light emitting device 101 is connected. Accesses an information table stored in the storage unit 110a of the server 110 via the Internet line, reads control information corresponding to the acquired control ID, generates a control signal based on the control information, and generates the light emission control unit 105. The power supply unit 4 supplies power corresponding to the control signal to the surface emitting panel through the panel connection unit 5b. Accordingly, each light emitting device 101 determines an appropriate supply power according to the light emission characteristics of the mounted surface light emitting panel 2 in the same manner as in the first embodiment described above, and is appropriate for each surface light emitting panel 2. Power can be supplied.

  Each light emitting device 101 can transmit the update information to the server 110 via the communication line when the update information is acquired from an external storage medium such as a memory card. When the server 110 receives the update information, the server 110 collates the update information with the information table in the storage unit 110a. When the received update information is newer than the contents of the information table in the storage unit 110a, the server 110 rewrites the information table with the received update information. The operator can directly rewrite the information table in the storage unit 110a of the server 110.

  As described above, when each light emitting device 110 reads the control information from the server 110, the server 110 can collectively manage the control ID and the control information, and can share information in the light emitting system 100. it can.

  In addition, since the light emission control part 105 which comprises each light-emitting device 101 may have a different characteristic (for example, temperature characteristic), the light emission of each light-emitting device 101 is stored in the memory | storage part 110a of the server 110. FIG. You may have the information table corresponding to each of the control part 105. FIG. In such a case, each light emitting device 101 transmits unique information of the light emission control unit 105 to the server 110 and refers to an appropriate information table.

  In addition, the light emission control unit 105 may have a storage unit that stores an information table as in the first embodiment. In such a case, the light emitting device 101 can appropriately supply power to the surface light emitting panel 2 by referring to the internal information table and the information table of the server 110 as appropriate. For example, when a communication failure between the light emitting device 101 and the server 110 occurs, the information table in the storage unit of the light emitting device 101 is referred to, and when the communication failure is resolved, the information table of the server 110 is referred to. The appropriate power to be supplied to the surface light emitting panel 2 can be determined.

DESCRIPTION OF SYMBOLS 1,101 Light-emitting device 2 (organic EL) Surface light emission panel 2a Memory | storage part 4 Electric power supply part 5,105 Light emission control part 5a Memory | storage part 5b Panel connection part 5c Central processing circuit 6 Operation part 11 Transparent substrate 12, 12R, 12G, 12B Organic EL light emitting element 13 Light diffusion layer 14 Sealing layer 15, 15R, 15G, 15B Anode 16, 16R, 16G, 16B Organic layer 17, 17R, 17G, 17B Cathode 20 Organic EL light emitting element group 21 Red light emitting element group 22 Green light emitting element group 23 Blue light emitting element group 24, 24R, 24G, 24B n-channel MOS transistor 107 communication unit 110 server 110a storage unit 110b communication unit

Claims (12)

A light-emitting device having at least one surface-emitting panel, a light-emission control unit that controls a light-emitting state of the surface-emitting panel, and a power supply unit that supplies power to the surface-emitting panel,
The surface-emitting panel has a unique control ID,
The light emission control unit acquires a control ID from the surface emitting panel, reads the control information corresponding to the control ID from an information table having the control ID and control information corresponding to the control ID, and the read control information A control signal based on
The light emitting device, wherein the power supply unit supplies power corresponding to the control signal to the surface light emitting panel.   The light emitting device according to claim 1, wherein the information table is stored in a storage unit in the light emitting device.   2. The light emitting device according to claim 1, wherein the light emission control unit reads control information corresponding to the control ID from the information table stored in an external recording medium via a communication line.   The light-emitting device according to claim 3, wherein the communication line is an Internet line.   5. The light emitting device according to claim 1, wherein the light emission control unit can update the information table based on update information supplied from outside. The information table includes standard control information used instead of the control information corresponding to the control ID when the light emission control unit cannot read the control information corresponding to the control ID.
The light emission according to any one of claims 1 to 5, wherein the light emission control unit generates a control signal based on the standard control information when the control information corresponding to the control ID cannot be read. apparatus.   The control information includes information corresponding to the control ID and representing a relationship between at least one of power, voltage, and current supplied to the surface light emitting panel and luminance in the surface light emitting panel. The light emitting device according to any one of claims 1 to 6.   The light emitting device according to claim 1, wherein the surface light emitting panel is a light emitting panel made of an organic EL light emitting element.   A plurality of the surface light emitting panels are provided, each of the surface light emitting panels is provided with a unique identification ID for identifying each of the surface light emitting panels, and the power supply unit supplies power corresponding to the control signal based on the identification ID. The light emitting device according to claim 1, wherein the light emitting device is supplied to each of the surface light emitting panels.   A light emitting system comprising the light emitting device according to claim 1. A method of controlling a light emitting device having at least one surface light emitting panel,
Obtaining a unique control ID included in the surface emitting panel;
Reading control information corresponding to the control ID from an information table having control information corresponding to the control ID and the control ID;
Generating a control signal based on the control information;
Supplying the electric power corresponding to the control signal to the surface light emitting panel.   12. The method of controlling a light emitting device according to claim 11, wherein the light emitting device has a plurality of surface light emitting panels, and the step of supplying the power is a unique method for identifying each of the surface light emitting panels. A method for controlling a light emitting device, comprising: supplying electric power to each of the surface light emitting panels based on the identification ID.

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