JP5573576B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device using a plurality of planar light sources.

  2. Description of the Related Art In recent years, surface emitting illumination devices that use organic EL elements as light sources have attracted attention. An organic EL element generally has a configuration in which an organic layer including a light emitting layer (a thin film made of an organic compound containing a fluorescent organic compound or a phosphorescent organic compound) is sandwiched between an anode and a cathode, and current is supplied between the electrodes. This is an element that emits light.

  Conventionally, light bulbs or fluorescent lamps have been used for lighting applications, but light bulbs have poor luminous efficiency, and both are inferior to organic EL elements in terms of light emission lifetime.

  In recent years, LEDs have begun to be used for lighting applications because of their excellent luminous efficiency. However, since the elements themselves are small, it is necessary to arrange them in an array, and in addition to LEDs, there are many optical elements other than LEDs. A member is required.

  On the other hand, as described above, since the organic EL element is a thin film device, it becomes a planar light source simply by creating the element, so that illumination can be made thinner and lighter. In addition, with the recent progress of organic EL materials, luminous efficiency and luminous lifetime have been greatly improved.

Since it is a thin film device, the organic EL element is easy to increase the size of the panel as compared with other light sources, but there is a limit to an increase in area due to limitations due to the manufacturing method. As a countermeasure, by such a module 6 2 illumination section 6 0 which is connected to the controller 61 modularized as shown in FIG. 2 can be multiple connections, it is considered to correspond to the large area.

  In the case of using in a form in which a plurality of modules are connected for lighting purposes, a means for controlling variation in luminance between modules is required.

  For example, Patent Document 1 provides a module configuration and a connection method for connecting a plurality of illumination modules to such a problem.

  Here, a general module configuration and a control method thereof will be described. FIG. 3 is a configuration diagram of a conventional lighting device.

  The lighting device 200 includes a controller module 101 and a lighting module 102. The controller module includes a power supply circuit 111 and a master controller 112. The illumination module 102 includes a current controller 121, a slave controller 122, an organic EL element 123, a luminance sensor 124, and a temperature sensor 125.

  First, a power supply method will be described.

  The power supply circuit 111 on the controller module 101 generates a DC voltage necessary for driving each block that consumes power from the power input from the outside. The electric power generated in the power supply circuit 111 is supplied to the anode wiring 113 arranged on the controller module 101 and supplied to the master controller 112.

  Electric power is supplied to the lighting module 102 via the anode power output terminal 118 on the controller module 101, passes through the external anode wiring 151 and the anode power input terminal 131 on the lighting module 102, and the anode wiring 126 on the lighting module 102. And power is supplied to the power supply control unit 121 and the slave controller 122 on the lighting module 102.

Next, a method for supplying a control signal will be described.
Control signal transmission / reception is performed only between the master controller 112 and the slave controller 122. The signal output from the signal input / output terminal of the master controller 112 is output to the control line 140 on the controller module 101, and the control line connection terminal 141 on the controller module 101, the external control line wiring 153, and the control on the lighting module 102. The signal is transmitted to the signal input / output terminal of the slave controller 122 via the line connection terminal 143 and the control line wiring 142 on the lighting module 102.

On the other hand, when signals are transmitted from the slave controller 122 to the master controller 112, the signals are transmitted in the reverse order of the path shown above.
On the other hand, the cathode is directly connected to the cathode wiring 114 on the controller module 101 from the power supply circuit 111, via the cathode power output terminal 119 on the controller module 101, the external cathode wiring 152, and the cathode power input terminal 132 on the illumination module 102. And connected to the cathode wiring 127 on the illumination module.

  As described above, in the conventional configuration, the anode wiring 126 and the control line 140 are wired independently, and the power is controlled via the anode wiring 126 and the cathode wiring 127, and the brightness adjustment and the control of lighting / extinguishing are control lines. 140.

JP 2009-218094

  The organic EL element has a characteristic difference for each element like a normal inorganic semiconductor, and also has a temperature characteristic, so simply applying the same voltage causes a difference in light emission luminance for each lighting module. A means for controlling the amount of current flowing in the organic EL element is required for each module.

  Further, in order to autonomously control the light emission luminance for each lighting module, it is necessary to provide a temperature sensor and a luminance sensor for each module.

  However, the technology disclosed in Patent Document 1 includes a temperature sensor and a luminance sensor for each lighting module, but is directly connected to the cathode wiring and the anode wiring, and has a current control function for each lighting module. In principle, it is impossible to control the brightness between modules.

  On the other hand, when each lighting module has a current control function, it is generally considered that the power supply line and the control line are generally arranged independently as described above. However, in this method, for example, when the power supply line is normal but only the control line is disconnected for some reason, not only module control becomes impossible, but it is difficult to identify the failed module part by visual inspection.

  The object of the present invention is to control the luminance variation between modules when connecting a plurality of organic EL lighting modules, or to control the emission luminance of each module, and to detect a faulty module when an abnormality such as disconnection occurs. An easy identification method is to provide a highly reliable and simple configuration.

The above object can be achieved by the following configuration.
1. An illumination device including at least an organic EL panel and a control device for driving and controlling the organic EL panel, and an anode wiring and a cathode wiring for supplying power between the EL panel and the control device The control device has a first controller for controlling the EL panel, and the organic EL panel has at least a light emitting element and a second controller, and the first controller and the second controller The two controllers are connected to a wiring through an inductor for applying the power from the anode wiring and a wiring through a capacitor for supplying a control signal from the anode wiring. Lighting device.
2. The lighting device according to the above, wherein the sensor is a temperature sensor or a luminance sensor.

It is a block diagram of the illuminating device which concerns on this Embodiment. It is a block diagram showing the connection form of the illuminating device which consists of a some illumination module. It is a block diagram of the illuminating device which concerns on the conventional embodiment.

  Embodiments of the present invention will be described with reference to the drawings. In addition, although this invention is demonstrated based on embodiment of illustration, this invention is not restricted to this embodiment. Further, the following assertive explanations in the embodiments of the present invention do not limit the meaning and technical scope of the terms of the present invention.

  FIG. 1 is a diagram showing a system configuration according to the present embodiment. The system includes a controller module 1 as a control device and an illumination module 2 as an organic EL panel.

Basic configuration
The controller module 1 includes a power supply circuit 11, a master controller 12 as a first controller, an anode wiring 13 disposed on the controller module 1, and a cathode wiring 14 disposed on the controller module 1. The output of the power supply circuit 11 is connected to the anode wiring 13 through the inductor 15. The power input terminal of the master controller 12 is connected to the anode wiring 13 via an inductor 16 and the signal input / output terminal is connected via a capacitor 17 as a capacitor.

  The illumination module 2 includes a current controller 21 and a slave controller 22 as a second controller, an organic EL element 23 as a light emitting element, a luminance sensor 24, a temperature sensor 25, an anode wiring 26 disposed in the illumination module 2, and an illumination module. 2 is composed of a cathode wiring 27 arranged in the area 2. Further, a power input terminal (not shown) of the current control unit 21 is connected to the anode wiring 26 via the inductor 28. The power input terminal of the slave controller 22 is connected to the anode wiring 26 via an inductor 29 and the signal input / output terminal is connected to a capacitor 30 as a capacitor.

  Then, the power supply method of each part is demonstrated.

  The power supply circuit 11 on the controller module 1 generates a DC voltage required for driving each block that consumes power from the power input from the outside. The electric power generated in the power supply circuit 11 is supplied to the anode wiring 13 disposed on the controller module 1 via the inductor 15 and supplied to the master controller 12 via the inductor 16.

  Further, the power supply to the lighting module 2 is performed via the anode power output terminal 18 on the controller module 1, passes through the external anode wiring 51 and the anode power input terminal 31 on the lighting module 2, and the anode on the lighting module 2. It is supplied to the wiring 26. Power supply to the power supply control unit 21 and the slave controller 22 on the lighting module 2 is performed via an inductor 28 and an inductor 29.

  Next, a method for supplying a control signal will be described.

  Control signal transmission / reception is performed only between the master controller 12 and the slave controller 22. A signal output from the signal input / output terminal of the master controller 12 is transmitted to the anode wiring 13 via the capacitor 17. Thereafter, the signal is transmitted to the anode wiring 26 on the lighting module via the anode power output terminal 18 on the controller module, the external anode wiring 51 and the anode power input terminal 31 on the lighting module, and finally via the capacitor 30. The signal is transmitted to the signal input / output terminal of the slave controller 22.

  On the other hand, when signals are transmitted from the slave controller 22 to the master controller 12, the signals are transmitted in the reverse order of the path shown above.

  There is a concern that a signal may be input to the power input terminal of each part during signal transmission / reception, but since an inductor (not shown) is connected in series to the power input terminal of each part, a control signal may be input. There is no.

  Further, since a capacitor (not shown) is connected in series to each power supply input / output terminal, the potential of the power supply is not input as a control signal.

  On the other hand, since the cathode wiring 27 is not used for signal transmission / reception, it is not necessary to connect an inductor to the subsequent stage of the power supply circuit 11, and is directly connected to the cathode wiring 14 on the controller module 1, and on the controller module. The cathode power supply output terminal 19, the external cathode wiring 52 and the cathode power supply input terminal 32 on the lighting module are supplied to the cathode wiring 27 on the lighting module.

  With the configuration described above, power supply and control signal transmission / reception can be performed with one anode wiring.

"Specific operation"
The master controller 12 sets the emission luminance, reads the value of the brightness sensor 24, reads the value of the temperature sensor 25, sets the specified value of the brightness sensor 24, or sets the specified value of the temperature sensor 25 to the slave controller 22. Control is possible.

  On the other hand, the slave controller 22 does not operate by itself and performs a predetermined operation on the command transmitted from the master controller 12.

  The slave controller 22 can measure the display brightness and module temperature of the lighting module 2 from the brightness sensor 24 and the temperature sensor 25 of the lighting module 2. When there is a certain rule between the reading value of the temperature sensor 25 and the reading value of the brightness sensor 24 and the light emission luminance of the illumination module 2, the slave controller 22 can control the light emission luminance to be constant using this. Is possible.

  For example, the reading values of the luminance sensor 24 and the temperature sensor 25 at the time of initial luminance emission are stored in the slave controller 22 as prescribed values in advance, and the measured values of the luminance sensor 24 and the temperature sensor 25 are regularly measured during normal use. To determine whether the measured value is different from the specified value. And when it determines with a different value, the current controller 21 is controlled by the slave controller 22, and the electric current supplied to the organic EL element 23 is controlled so that it may become a predetermined value.

  The slave controller 22 may have a unique serial number for each lighting module 2. Thus, even when a plurality of lighting modules 2 are connected via the anode terminal 33 and the cathode terminal 34 provided for cascading the lighting modules 2, commands can be transmitted and controlled for each module 2. It becomes possible.

  In addition, when there is a close relationship between the usage time and the light emission luminance and the lifetime, the nonvolatile memory or the like is built in the slave controller 22 to store the usage time and the emission luminance, so that it can be used for the prediction of the lifetime. Can do.

  Further, in this embodiment, the anode wirings 13 and 26 are also used as control lines. In other words, the anode wiring and the control line are composed of one wiring, so that the anode wirings 13 and 26 can be provided at one place. If it is disconnected, even if a command is transmitted from the master controller 12 to the slave controller 22, there is no response, so the master controller 12 can identify an abnormality and an abnormal part, and the abnormal part can be confirmed by visual inspection. it can.

  In addition, the power supply of the lighting modules cascaded behind the malfunctioning lighting module stops, so it is easy to visually identify the abnormal part, and the anode wiring of the cascaded lighting modules is abnormal. The possibility that a large amount of power is supplied can be completely eliminated.

DESCRIPTION OF SYMBOLS 1 ... Controller module as a control apparatus, 2 ... Lighting module as an organic electroluminescent panel, 11 ... Power supply circuit, 12 ... Master controller, 13 ... 1st anode wiring in a controller module, 14 ... 1st cathode wiring in a controller module , 15 ... first anode wire and the power source circuit and a first inductor for DC coupling, 16 ... first anode wire and the master controller of the second inductor power input terminal for DC coupling, 17 ... first anode wire And a first capacitor for AC coupling the signal input / output terminals of the master controller, 18 ... a first anode power output terminal on the controller module, 19 ... a first cathode power output terminal on the controller module , 21 ... a current controller, 22 ... Slave controller, 23 ... Organic EL element , 24 ... brightness sensor, 25 ... temperature sensor, the second anode wirings 26 ... lighting module, 27 ... second cathode lines in the illumination module, 28 ... power input terminal of the second anode wire and current controller DC A third inductor to be coupled, 29... A fourth inductor for DC coupling the second anode wiring and the power input terminal of the slave controller, 30... A second for AC coupling the second anode wiring and the signal input / output terminal of the slave controller . 2 capacitors, 31 ... anode power input terminal on the lighting module, 32 ... cathode power input terminal on the lighting module, 33 ... second anode power output terminal on the lighting module, 34 ... second cathode power output terminal on the lighting module , anode wires for connecting 51 ... module, cathode wiring connecting between 52 ... module, 60 ... illumination unit, 61 ... control Ra, 62 ... module.

Claims (1)

An illumination device comprising at least an illumination module that is an organic EL panel and a controller module that is a control device for driving and controlling the organic EL panel,
Between the lighting module and the controller module are provided anode wiring and cathode wiring for supplying power, a plurality of the lighting modules are cascade-connected to the controller module,
The controller module includes a power supply circuit that generates a DC voltage, a first anode wiring and a first cathode wiring connected to the power supply circuit, a master controller for controlling the lighting module , and the first anode wiring. A first anode power output terminal connected to the first cathode power output terminal connected to the first cathode wiring ;
An output of the power supply circuit is connected to the first anode wiring via a first inductor, and a power input terminal of the master controller is connected to the first anode wiring via a second inductor, so that a signal input of the master controller is connected. The output terminal is connected to the first anode wiring through a first capacitor,
The lighting module includes an anode power source input terminal and a cathode power source input terminal that are cascade connection input terminals, a second anode power source output terminal and a second cathode power source output terminal that are cascade connection output terminals, and the anode power source input terminal. And the second anode power source output terminal, a second cathode wire connecting the cathode power source input terminal and the second cathode power source output terminal, and an organic light emitting device EL element , slave controller that performs a predetermined operation in response to a command transmitted from the master controller, a current control unit connected between the second anode wiring and the organic EL element, and measuring emission luminance A brightness sensor that measures temperature and a temperature sensor that measures temperature ,
A power input terminal of the current controller is connected to the second anode wiring through a third inductor, and a power input terminal of the slave controller is connected to the second anode wiring through a fourth inductor, and the slave controller The signal input / output terminal is connected to the second anode wiring through a second capacitor,
The anode of the organic EL element is connected to the second anode wiring via the current control unit and the third inductor, and the cathode of the organic EL element is connected to the second cathode wiring,
Control signals can be transmitted and received between the master controller and the slave controller. The slave controller has a unique serial number for each lighting module, and the master controller sends a control signal to each lighting module. Can be sent and controlled,
The slave controller reads the measured values of the brightness sensor and the temperature sensor, and when the measured value is determined to be a value different from a specified value, the slave controller controls the current control unit and supplies it to the organic EL element Control the amount of current
The slave controller includes a non-volatile memory and stores usage time and light emission luminance .

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