JP2016058292A - Light emission device and luminaire using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emission device which has a light emission module using an organic EL element as a light source and can detect an abnormal light emission element, stop the operation of the light emission element and suppress damage of the device, etc.SOLUTION: A light emission device 1 has a light emission element EL of a light emission module 2, and a power supply device 10 for supplying power to the light emission element EL. The light emission device 1 further has an element bypass circuit BC connected to the light emission element EL in parallel, and bypasses current flowing in the light emission element EL to an element bypass element BC according to a load voltage of the light emission element EL. According to this construction, an abnormal light emission EL is detected according to the load voltage, and the current flowing in the light emission element EL is bypassed to the element bypass element BC to stop the operation of the abnormal light emission element EL. Accordingly, a user can easily detect the light emission element, and thus damage, etc. of the device can be suppressed.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a light emitting device using an organic EL element as a light source and an illumination device using the same.

  An organic EL (Electro Luminescence) element can emit light with high luminance at a low voltage, and various emission colors can be obtained depending on the type of organic compound contained, and can be easily manufactured as a flat light-emitting panel. Therefore, in recent years, development of a light emitting device using an organic EL element as a light source has been advanced. While the organic EL element can increase the amount of light as the area of the light emitting surface increases, the increase in the size of the organic EL element may lead to an increase in the size of a manufacturing apparatus or a decrease in yield. Therefore, in a light emitting device using an organic EL element as a light source, a plurality of light emitting modules incorporating organic EL elements of a size that can be easily manufactured are used side by side.

  However, in such a light emitting device in which a plurality of organic EL elements (light emitting elements) are arranged side by side, particularly when they are connected in series, one of the light emitting elements has a short circuit fault (short). If the current continues to be supplied, the portion where the short-circuit failure has occurred locally generates heat, which may damage the light emitting device. Therefore, a threshold detection circuit configured to output a constant voltage when the potential difference generated between the anode and the cathode of the organic EL element is equal to or greater than the threshold, and the constant voltage output of the threshold detection circuit is converted into a constant current. There is known a light-emitting device including a VI conversion circuit that outputs the same (for example, see Patent Document 1). In this light emitting device, when the organic EL element is in a normal state, a constant current is output from the VI conversion circuit to the detection resistor, and when the organic EL element is short-circuited, a zero current is output from the VI conversion circuit. The Then, it is detected whether or not the organic EL element is short-circuited based on the voltage value of the detection resistor, and when the abnormality is detected, the driving of the organic EL element is stopped.

Japanese Patent No. 5280882

  However, in the light emitting device as described above, only a short circuit failure is detected in any of the plurality of organic EL elements. For this reason, the driving of the light emitting elements including the organic EL elements in the normal state is stopped, and the user needs to separately check which organic EL element has an abnormality such as a short circuit failure.

  The present invention solves the above-described problem, stops driving only light emitting elements having an abnormality such as a short circuit failure, and allows a user to easily detect an organic EL element, thereby suppressing damage to the apparatus. An object of the present invention is to provide a light emitting device capable of performing the above.

  The light emitting device of the present invention is a light emitting device including a light emitting element and a power supply device that supplies electric power to the light emitting element, further comprising an element bypass circuit connected in parallel with the light emitting element, According to a load voltage of the element, a current flowing through the light emitting element is diverted to the element bypass element.

  According to the present invention, an abnormal light emitting element is detected according to the load voltage of the light emitting element, the current flowing through the light emitting element is diverted to the element bypass element, and the driving is stopped. Therefore, the user can easily detect the light emitting element, and damage to the device can be suppressed.

(A) is a disassembled perspective view of the light-emitting device concerning the 1st Embodiment of this invention, (b) is a perspective view of the said light-emitting device. The circuit diagram of the said light-emitting device. The disassembled perspective view of the light emitting module which comprises the said light-emitting device. (A) (b) is a perspective view of another light emitting module, respectively. The figure which shows the attachment to the base part of the connector which comprises the said light emitting module. (A) thru | or (c) is a figure which shows operation | movement when mounting | wearing the said light emitting module to a base part. The specific circuit diagram of the said light-emitting device. 4A and 4B illustrate voltage characteristics of a light-emitting element used for the light-emitting device. The circuit diagram in the modification of the said light-emitting device. The block block diagram of the light-emitting device which concerns on the 2nd Embodiment of this invention. 6 is a flowchart illustrating an operation example of the light-emitting device. The specific circuit diagram of the said light-emitting device. (A) (b) is a time chart of operation | movement of the said light-emitting device. The circuit diagram which shows the concept of the modification of the said light-emitting device. The circuit diagram which shows the concept of the light emitting module in the said modification. (A) is a side cross-section block diagram of the light emitting module in the said modification, (b) is a top view. (A) is a side cross-section block diagram of the light emitting module in the modification of the said modification, (b) is a top view. The perspective view of the power supply device and connector which are used for the light-emitting device which concerns on the 3rd Embodiment of this invention. (A) is a side sectional view in the longitudinal direction of the power supply device, (b) is a side sectional view in the short direction passing through the output terminal, and (c) is a side sectional view in the short direction passing through the input terminal. FIG. 3 is a side sectional view of the light emitting device. The specific circuit diagram of the said power supply device. (A) is the perspective view of the mounting surface side in the modification of the said power supply device, (b) is a perspective view on the opposite side to (a). The perspective view of the mounting surface side in another modification of the said power supply device. (A) (b) is a block block diagram for demonstrating the premise of the light-emitting device which concerns on the 4th Embodiment of this invention. The circuit diagram of the light emitting module used for the said light-emitting device. (A) is a circuit diagram which shows operation | movement of the said light emitting module, (b) is a time chart. (A) is a circuit diagram which shows operation | movement of the said light emitting module, (b) is a time chart. The block diagram of the modification of the said light emitting module. The flowchart explaining operation | movement of the said modification. (A) is a perspective view of the light emitting module used for the light-emitting device which concerns on the 5th Embodiment of this invention, (b) An exploded perspective view. (A) is a side sectional view of the light emitting module in the lateral direction, (b) is a side sectional view in the longitudinal direction, and (c) is a side view in the longitudinal direction. (A) is a side view when the light emitting module is bent, and (b) is a perspective view. (A) is a perspective view of the light emitting module which concerns on the modification of said embodiment, (b) An exploded perspective view. (A) is a side sectional view of the light emitting module in the lateral direction, (b) is a side sectional view in the longitudinal direction, and (c) is a side view in the longitudinal direction. (A) is a perspective view of the light emitting module which concerns on another modification of said embodiment, (b) An exploded perspective view. (A) is a side sectional view of the light emitting module in the lateral direction, (b) is a side sectional view in the longitudinal direction, and (c) is a side view in the longitudinal direction. (A) is a perspective view of the light emitting module which concerns on another modification of said embodiment, (b) An exploded perspective view. (A) is a perspective view of the light emitting module used for the light-emitting device concerning the 6th Embodiment of this invention, (b) is a perspective view of another form, (c) is a perspective view of another form. The perspective view of the light emitting module of another form. (A) is a top view of the light emitting module, and (b) is a side sectional view. (A) is an expanded sectional side view of the protrusion of the said light emitting module, (b) is a top view.

  A light-emitting device that is one configuration of the illumination device according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 (a) and 1 (b), in the light emitting device 1 of the present embodiment, a light emitting module 2 using an organic EL element (light emitting element) as a light source and a long length in which the light emitting module 2 is detachably mounted. A description will be given based on a configuration including the base portion 3 having a shape.

  The base part 3 includes a connector 4 that is connected to the light emitting module 2 and is used for supplying power to the light emitting module 2, and a plurality of connector attaching parts 31 for detachably attaching the connector 4. The connector attachment portion 31 is provided for each predetermined length along the longitudinal direction of the base portion 3.

  A plurality of light emitting modules 2 are attached to one base portion 3. In the illustrated example, three light emitting modules 2 a, 2 b and 2 c having different sizes are mounted on the base portion 3. Each of these light emitting modules 2a to 2c has a rectangular flat plate shape, and is mounted on the base portion 3 via each mounting surface 2A. Each of the light emitting modules 2 a to 2 c has a length of a side along the longitudinal direction of the base portion 3 (hereinafter referred to as a side along the longitudinal direction) when mounted on the base portion 3. It is configured to be an integral multiple of W. Further, in each of the light emitting modules 2a to 2c, the length of the side along the short direction of the base part 3 (hereinafter referred to as the side along the short direction) when mounted on the base part 3 is equal. In the illustrated example, the light emitting modules 2a to 2c are arranged adjacent to each other along the longitudinal direction of the base portion 3 in the order of the light emitting modules 2a → 2b → 2c. However, the arrangement of the light emitting modules 2 is not limited thereto. Moreover, the several light emitting module 2 of the same magnitude | size may be used, and those combinations are arbitrary.

  Each of the light emitting modules 2a to 2c includes an engaging portion 21 and a holding portion 22 that are used for mounting on the base portion 3 on each mounting surface 2A. The engaging portion 21 and the holding portion 22 are provided at the center of one side along the longitudinal direction and the center of the other side along the longitudinal direction, respectively.

  In addition, the light emitting modules 2a to 2c have a pair of power supply terminals 23 and 24 erected from each mounting surface 2A. The power supply terminals 23 and 24 are provided on both ends of the mounting surface 2A on the engaging portion 21 side and in the direction orthogonal to the direction connecting the engaging portion 21 and the holding portion 22, respectively. Each of the power supply terminals 23 and 24 includes an anode terminal 23a and 24a and a cathode terminal 23b and 24b, respectively. The anode terminals 23 a and 24 a and the cathode terminals 23 b and 24 b are arranged side by side in a direction parallel to the direction connecting the engaging portion 21 and the holding portion 22. The anode terminals 23a and 24a and the cathode terminals 23b and 24b are electrically connected to each other via a printed wiring board described later.

  The base portion 3 has a long rectangular flat plate shape, and one surface thereof is an attachment surface 3A that is attached to a ceiling or a wall surface. In the illustrated example, the length of the base portion 3 in the longitudinal direction is set to be equal to the total length of the sides along the longitudinal direction of the light emitting modules 2a to 2c. That is, the light emitting modules 2 a to 2 c are arranged without a gap over the entire length of the base portion 3 in the longitudinal direction. On the other hand, the length of the base portion 3 in the short direction is set to be equal to the length of the side along the short direction of the light emitting modules 2a to 2c.

  Further, the base portion 3 has a pair of sides extending in the longitudinal direction parallel to each other, and an engaged portion that engages with the engaging portion 21 of the light emitting module 2 over one side and the other side, respectively. 32 and a held portion 33 that engages with the holding portion 22 of the light emitting module 2. The connector mounting portion 31 described above is provided on the engaged portion 32 side in the base portion 3.

  The base portion 3 has an input connector mounting hole 34 for mounting the input connector 5 through which the power supply terminal 24 of the light emitting module 2c is inserted on the engaged portion 32 side of one end portion in the longitudinal direction. The input connector 5 is used to electrically connect the power supply terminal 24 of the light emitting module 2c and a commercial power source or another light emitting device 1. Moreover, the base part 3 has the end cap attachment part 36 for attaching the end cap 35 by which the electric power feeding terminal 23 of the light emitting module 2a is penetrated to the to-be-engaged part 32 side of the other end part in the longitudinal direction. The end cap 35 covers the power supply terminal 23 so that the power supply terminal 23 is not exposed. The outer surfaces of the input connector 5 and the end cap 35 are made of an insulating material. Accordingly, when the light emitting module 2 is mounted on the base portion 3 or when the light emitting module 2 is replaced, it is possible to prevent the user from touching the power supply terminals 23 and 24 to receive an electric shock or to prevent tracking.

  The holding part 22 of the light emitting module 2 a is arranged at a position corresponding to the intermediate position between the connector attaching parts 31, and the holding part 22 of each of the light emitting modules 2 b and 2 c is arranged at a position corresponding to the connector attaching part 31.

  The connector 4 is attached to the connector attachment portion 31 so as to be disposed at a boundary position between the light emitting modules 2 adjacent to each other. In the illustrated example, the connector 4 is disposed at the boundary position between the light emitting modules 2a and 2b, and the connector 4b is disposed at the boundary position between the light emitting modules 2b and 2c. The connector 4 is inserted with the power supply terminal 24 of the light emitting module 2a and the power supply terminal 23 of the light emitting module 2b. The power supply terminal 24 of the light emitting module 2 a and the power supply terminal 23 of the light emitting module 2 b are electrically connected to each other by a terminal receiving portion (not shown) provided in the connector 4. The power supply terminal 24 of the light emitting module 2b and the power supply terminal 23 of the light emitting module 2c are inserted into the connector 4b. The power supply terminal 24 of the light emitting module 2b and the power supply terminal 23 of the light emitting module 2c are electrically connected to each other by a terminal receiving portion provided in the connector 4b.

  As shown in FIG. 2, the light emitting device 1 is connected to a power supply device 10 including an AC / DC converter that converts an alternating current from a commercial power supply AC into a direct current. The power supply device 10 may be disposed on the ceiling or behind the wall where the light emitting device 1 (base portion 3) is installed. As shown in the embodiment described later, the base portion 3 is similar to the light emitting module 2. The structure with which it is mounted | worn may be sufficient. The direct current supplied from the power supply device 10 is energized in the order of input connector 5 → light emitting module 2c → connector 4b → light emitting module 2b → connector 4a → light emitting module 2a. The voltage is transformed to a desired voltage by a DC / DC converter incorporated in each of the light emitting modules 2a to 2c. The DC / DC converter is housed in a lighting circuit provided in each of the power supply device 10 or the light emitting modules 2a to 2c.

  3 and 4A, the light emitting module 2a includes a rectangular flat light emitting panel 25, a printed wiring board 26 for supplying power to the light emitting panel 25, and the light emitting panel 25 and the printed wiring board 26. And a package 27 that accommodates.

  The light-emitting panel 25 includes an organic EL element as a light source, and a light-transmitting substrate, a light-emitting unit, and a sealing can that seals the light-emitting unit in that order from the light-emitting surface side (not shown). For example, the light emitting unit includes, in order from the light transmitting substrate side, a positive electrode made of a transparent conductive film, a light emitting layer containing a light emitting organic material, and a negative electrode having light reflectivity. The sealing can isolates the light emitting part from the outside air, particularly moisture and oxygen, and prevents the light emitting part from deteriorating.

  The printed wiring board 26 includes a terminal insertion portion 26a through which each of the anode terminals 23a and 24a of the light emitting module 2a is inserted, and a terminal insertion portion 26b through which each of the cathode terminals 23b and 24b of the light emitting module 2a is inserted. . The anode terminals 23a and 24a and the cathode terminals 23b and 24b of the light emitting module 2a are electrically connected to the printed wiring board 26 by being inserted into the terminal insertion portions 26a and 26b, respectively. The terminal insertion portions 26a and the terminal insertion portions 26b are electrically connected to each other by wiring patterns (indicated by dotted lines in FIG. 4) provided on the printed wiring board 26, respectively.

  The package 27 has a rectangular box shape, a case 28 that covers a surface opposite to the light emitting surface of the light emitting panel 25, and a light-transmitting cover that engages the case 28 and covers the light emitting surface of the light emitting panel 25. 29. The engaging portion 21 and the holding portion 22 described above are provided on the surface (mounting surface 2A) of the case 28. The engaging portion 21 has a claw 21 a that extends in a direction opposite to the direction of the holding portion 22 and engages with the engaged portion 32 of the base portion 3.

  The holding part 22 includes a base 22b screwed to the mounting surface 2A with a screw 22a, and a direction opposite to the direction of the engaging part 21 from the base 22b, one end of which is fixed to the base 22b (hereinafter referred to as a holding part). And a claw 22d fixed to the other end of the spring 22c. The claw 22 d extends in the engaging direction of the holding portion 22 and engages with the held portion 33 of the base portion 3. In addition, the holding portion 22 moves from the claw 22d in the direction parallel to the side along the longitudinal direction of the base portion 3 and the protrusion 22e that is erected from the mounting surface 2A in the engaging direction of the holding portion 22. And a regulating portion 22f for regulating. The restricting portion 22f has a slide groove (not shown) in which the protrusion 22e fits and slides. Thereby, the claw 22d is elastically biased in the engaging direction of the holding portion 22, and can slide in the same direction.

  The case 28 is a rectangular box having an opening on the surface facing the light emitting panel 25. The case 28 has holes 28a provided on the mounting surface 2A for leading out the terminals 23a, 23b, 24a, 24b to the outside. The case 28 has a circuit housing portion 28b for housing a circuit board and the like. The cover 29 is made of a rectangular translucent member that covers the light emitting surface of the light emitting panel 25, and is fitted into the case 28.

  As shown in FIG. 4B, the light source unit 2b is a diagram except that the length W of the side along the longitudinal direction of each base unit 3 is twice (2W) that of the light source unit 2a. The light source unit 2a shown in FIG. The light source unit 2c is four times as large as the light source unit 2a (not shown here).

  As shown in FIG. 5, the connector 4 has a flat rectangular box shape and has a holding case 40 that stores and holds a terminal receiving portion (not shown). The holding case 40 has an outer surface made of an insulating material, and on a surface facing the light emitting module 2, an anode terminal insertion port 41 into which the anode terminal 24a of the light emitting module 2a is inserted, and a cathode terminal 24b of the light emitting module 2a. A cathode terminal insertion port 42 into which is inserted. Moreover, the holding case 40 has an anode terminal insertion port 43 into which the anode terminal 23a of the light emitting module 2b is inserted and a cathode terminal insertion port 44 into which the cathode terminal 23b of the light emitting module 2b is inserted on the same surface. Furthermore, the holding case 40 has a plurality of protruding claws 45 used for engagement between the holding case 40 itself and the connector mounting portion 31.

  The connector mounting portion 31 is formed by bending the bottom surface of the base portion 3 and is engaged with a pair of holding pieces 31 a that sandwich the connector 4 from the longitudinal direction of the base portion 3 and a projection claw 45 of the connector 4 provided on the holding piece 31 a. And a recess 31b. The connector 4 is detachably attached to the connector attachment portion 31 by being pushed into the connector attachment portion 31 from above so that the projection claw 45 engages with the recess 31b.

  As shown in FIGS. 1A and 1B, the light emitting device 1 configured in this way is first connected to the connector mounting portion 31, which is a boundary position between adjacent light emitting modules 2, in the base portion 3. Is attached. The light emitting device 1 can increase the degree of freedom of arrangement of the light emitting module 2 by changing the arrangement of the connector 4 by detachably attaching the connector 4 to an arbitrary connector attachment portion 31.

  Next, as shown in FIG. 6A, the light emitting module 2 is inclined with respect to the base portion 3 so that the engaged portion 32 of the base portion 3 and the engaging portion 21 of the light emitting module 2 are close to each other. Into. Subsequently, as shown in FIG. 6B, the light emitting module 2 is rotated in the direction of the base portion 3 while the engaged portion 32 and the engaging portion 21 are engaged, and the light emitting module 2 is held. The portion 22 and the held portion 33 of the base portion 3 are brought into contact with each other. At this time, since the holding portion 22 is configured to be slidable, as shown in FIG. 6C, the tip (claw) of the holding portion 22 gets over the convex portion of the held portion 33 and also into the concave portion. Engage. In this way, by using the inclination of the tip of the holding portion 22, the force of the rotating operation is converted into a force that slides the holding portion 22 in the direction of the engaging portion 21, thereby easily mounting the light emitting module 2 on the mounting portion. 3 can be attached. Then, as shown in FIG. 1B, the plurality of light emitting modules 2 a to 2 c are mounted on the base portion 3 while being electrically connected to each other by the connector 4. In addition, the input connector 5 is attached to the connector attachment hole 34 at the end of the base portion 3, and the light emitting module 2 is electrically connected to the power supply device 10 through the input connector 5 as shown in FIG. 2. Connected to.

  Thus, in the light-emitting device 1 in which a plurality of light-emitting modules 2 each using an organic EL element (light-emitting element) as a light source are arranged side by side, if a short-circuit failure occurs in any of the light-emitting elements of the light-emitting module 2, a short-circuit failure occurs. There is a risk that the damaged part will generate heat locally and be damaged. Therefore, the lighting circuit of the lighting device 1 includes an element bypass circuit connected in parallel with the organic EL element (light emitting element) that is the light source of the light emitting module 2, and a current flowing through the light emitting element according to the load voltage of the light emitting element. Is bypassed to the element bypass element.

  Specifically, as illustrated in FIG. 7, the lighting circuit of the light emitting device 1 is a circuit in which a protection circuit unit 11 including an element bypass circuit is connected to the light emitting element EL of the light emitting module 2 connected to the power supply device 10. It has a configuration. Here, a configuration in which the light emitting element EL is connected to the power supply device 10 is shown, but a plurality of light emitting modules 2 (light emitting elements) are used in the light emitting device 1 as described in the embodiments described later. .

  The power supply apparatus 10 includes an AC / DC converter 12 that converts an alternating current supplied from a commercial power supply AC into a direct current, and a DC / DC converter 13 that generates a direct current constant output to the light emitting element EL. The AC / DC converter 12 includes a diode bridge circuit DB, a smoothing capacitor C1, a transformer (not shown), a PFC (power factor correction) circuit, and the like. The DC / DC converter 13 includes a DC / DC control IC, a switch element, and the like.

  The protection circuit unit 11 includes a thyristor SCR1 connected in parallel to the light emitting element EL, and transistors Tr1 and Tr2 connected in parallel therebetween. The base of the transistor Tr1 is connected to the cathode of the light emitting element EL through the base resistor R1. The collector of the transistor Tr1 is connected to the resistor R2 and the base of the transistor Tr2. The transistor Tr2 is connected in series with the resistor R3, and its emitter is connected to the gate of the thyristor SCR1. The protection circuit unit 11 configured as described above functions as a bypass circuit in which a circuit including the thyristor SCR1 connected in parallel with the light emitting element EL bypasses the current flowing through the light emitting element EL.

  By the way, in a light emitting device using a conventional organic EL element as a light source, when a failure such as a short circuit occurs in the organic EL element, the supply of current to the load is stopped based on the decrease in the detected lighting voltage, which is unnecessary. There are some which suppress the heat generation at the failure part due to the current application and the damage of the device. However, even in an abnormal organic EL element, the load voltage when a rated current is applied may be equivalent to the lighting voltage of a normal organic EL element due to the resistance component of the organic EL element.

  FIG. 8 shows voltage-current characteristics of a light emitting device having normal and short circuit abnormalities. The solid lines (three) in the same are the voltage-current characteristics of normal light emitting elements. The voltage at which light emission of the light emitting element starts is the lighting start voltage V0. The rated voltage at the rated current I1 is V1. Here, the rated current I1 refers to a constant current when the light emitting element is continuously turned on as a light source (continuous light emission at the rated luminance). On the other hand, broken lines (three lines) in the figure are voltage-current characteristics of a light emitting element having a short circuit abnormality. When the current is 0 A, the voltage is 0 V, indicating a substantially linear voltage-current characteristic (resistance characteristic).

  The voltage-current characteristic of a light emitting element having a short circuit abnormality has a large variation in resistance value (current gradient with respect to voltage) depending on the short circuit state. Therefore, when the rated current I1 is passed through the light emitting element, the voltage value at the normal time is approximately V1, whereas the voltage value Vth at the abnormal time has a large variation. On the other hand, when the minute current I2 is passed through the light emitting element, the voltage value at the normal time is approximately V0, and the voltage value at the abnormal time is approximately 0 V (several mV).

  For example, as shown in Table 1 below, when an organic EL element has a rated current I1 of 300 mA, a normal organic EL element has a load voltage of 6 V (V1), whereas there is a short circuit abnormality. The organic EL element was 0.1 V (Vth), and the abnormal organic EL element having a resistance component was 6 V (Vth). On the other hand, when the minute current I2 is 1 mA, a normal organic EL element has a load voltage of 5 V (V0), whereas an organic EL element having a short circuit abnormality has a resistance component of 0.1 V (0 V). It was 18 mV (0 V) in a certain abnormal organic EL element.

  In other words, when the minute current I2 was set to 1/300 of the rated current I1, the load voltage was almost 1/333 in any organic EL element having an abnormality. In the light emitting device 1 of the present embodiment, the abnormality of the light emitting element is detected based on the difference in voltage value between the rated current I1 and the minute current I2, and the protection circuit unit 11 (element bypass) described above is detected. Circuit).

  The operations of the light emitting device 1 and the protection circuit unit 11 will be described again with reference to FIG. The power supply device 10 executes a rated current mode for supplying the rated current I1 of the light emitting element EL and a minute current mode for supplying a minute current I2 that is smaller than the rated current I1. Then, the protection circuit unit 11 (element bypass circuit) is configured such that the load voltage 0V of the light emitting element EL in the minute current mode is the value of the load voltage Vth of the light emitting element EL and the minute current I2 in the rated current mode. Conduction occurs when the product is substantially equal to the product of the quotient divided by. That is, the protection circuit unit 11 (element bypass circuit) becomes conductive when the load voltage of the light emitting element EL in the minute current mode is 0 V≈load voltage Vth × (minute current I2 / rated current I1).

  More specifically, when a minute current I2 is applied to the light emitting element EL with respect to the rated current I1 in the minute current mode, if the light emitting element EL is in a normal state, the load voltage V1 of the light emitting element EL (FIG. Therefore, the cathode potential of the light emitting element EL (base potential of the transistor Tr1) is lowered, and the transistor Tr1 is turned on. When the transistor Tr1 is turned on, the base potential of the transistor Tr2 is increased, so that the transistor Tr2 is turned off. When the transistor Tr2 is off, the gate current does not flow through the thyristor SCR1, and the anode and cathode of the thyristor SCR1 do not conduct, so that the element bypass circuit does not function and a current flows continuously through a normal light emitting element EL.

  On the other hand, if the light-emitting element EL is in an abnormal state, the load voltage 0V (see also FIG. 8) of the light-emitting element EL is extremely small, so that the base potential of the transistor Tr1 is high and the transistor Tr1 is turned off. When the transistor Tr1 is turned off, the base potential of the transistor Tr2 is lowered, so that the transistor Tr2 is turned on. When the transistor Tr2 is on, a gate current flows through the thyristor SCR1 and the thyristor SCR1 is turned on, so that a current flows from the defective light emitting element EL to the element bypass circuit.

  In this way, the light emitting device 1 of the present embodiment stops driving only the organic EL element (light emitting element EL) having an abnormality such as a short circuit failure, and suppresses damage to the device due to local heat generation. it can. Further, since the light emitting element having an abnormality does not light, the user can easily detect the abnormality of the light emitting element. Furthermore, since it is not necessary to provide the power supply device 10 with a configuration for detecting an element abnormality, the power supply device 10 can be applied to the light emitting device 1 incorporating an unspecified number of light emitting elements EL. Moreover, even when a plurality of light emitting elements EL (light emitting modules 2) are connected, the output current in the power supply device 10 does not change, so that the output capacity of the power supply device 10 can be easily set, and the configuration of the power supply device 10 is simplified. can do.

  Further, since the light emitting device 1 of the present embodiment detects an abnormality of the light emitting element EL by the minute current I2, when the rated current I1 is applied, even if there is an abnormality, it becomes equal to the lighting voltage of the normal light emitting element due to the resistance component. Even a thing, the abnormality can be detected and the drive of the light emitting element can be stopped.

  Further, the power supply device 10 executes the rated current mode after executing the minute current mode at the start of lighting of the light emitting device 1. Here, the minute current mode has a detection period in which a light emitting element EL having an abnormality is detected, the current flowing through the light emitting element EL is diverted to the element bypass circuit, and then the mode is shifted to the rated current mode. In this way, since the minute current I2 flows only to the light emitting element EL having an abnormality at the start of lighting and the rated current I1 does not flow, damage to the device due to heat generation of the light emitting element EL having an abnormality can be more reliably suppressed. be able to.

  Further, the power supply apparatus 10 periodically switches between the minute current mode and the rated current mode for execution. For example, the minute current mode of 10 ms is executed every 30 s as the rated current mode. In this way, even if an abnormality occurs in the light emitting element EL due to continuous use, the abnormality can be detected quickly, and driving of the light emitting element EL can be stopped, and unnecessary power can be used. Consumption can be suppressed.

  Next, a light emitting device according to a modification of the above embodiment will be described with reference to FIG. In the light emitting device 1 of this modification, the configuration of the protection circuit unit 11 is different from that of the above embodiment. The protection circuit unit 11 of this modification further includes a thyristor SCR2 (resistance bypass circuit) provided in parallel with a series resistor R0 connected in series with the light emitting element EL. This resistance bypass circuit is configured to be conductive when the element bypass circuit (thyristor SCR1) is not conductive.

  The protection circuit unit 11 includes a Zener diode ZD for voltage stabilization, a thyristor SCR1 connected in parallel to the light emitting element EL, and transistors Tr1 and Tr2 connected in parallel between them. The transistor Tr1 is connected to the collector of the resistor R2, and the base is connected to the cathode of the light emitting element EL through the base resistor R1. The collector of the transistor Tr1 is connected to the gate of the thyristor SCR1 through the resistor R3. The transistor Tr2 has a collector connected to the gate of the thyristor SCR2, and a base connected to the resistor R4.

  Next, operations of the light emitting device 1 and the protection circuit unit 11 will be described. When a minute current I2 is applied to the light emitting element EL with respect to the rated current I1 in the minute current mode, if the light emitting element EL is in a normal state, the cathode potential of the light emitting element EL is lowered, so that the transistor Tr1 is turned on. Since no gate current flows through the thyristor SCR1, the element bypass circuit does not operate. At this time, since the collector potential of the transistor Tr1 becomes high, the base potential of the transistor Tr2 becomes high, the transistor Tr2 is turned on, a gate current flows through the thyristor SCR2, the thyristor SCR2 is turned on, and the resistance bypass circuit operates. To do.

  On the other hand, if the light emitting element EL is in an abnormal state, the cathode potential of the light emitting element EL is increased, so that the base potential of the transistor Tr1 is lowered and the transistor Tr1 is turned on. When the transistor Tr1 is turned on, a gate current flows through the thyristor SCR1 and the thyristor SCR1 is turned on, so that a current flows from the defective light emitting element EL to the element bypass circuit.

  In the embodiment shown in FIG. 7, for example, when the resistance value of the abnormal light emitting element EL is extremely low, the current may not be sufficiently diverted to the thyristor SCR1. On the other hand, according to the present modification shown in FIG. 9, since the series resistor R0 is connected to the light emitting element EL, when the thyristor SCR1 (element bypass circuit) is conductive, the resistance value of the light emitting element EL itself is Even in a very low case, current is diverted to the element bypass circuit. Further, when the thyristor SCR1 (element bypass circuit) is non-conductive, the thyristor SCR2 (resistance bypass circuit) is conductive, so that the current flowing through the normal light-emitting element EL flows not to the series resistor R0 but to the resistor bypass circuit. Therefore, unnecessary power is not consumed when the light emitting element EL is normally turned on. In general, if the resistance value of the light emitting element EL is extremely low, a large current flows through the light emitting element EL, and there is a possibility that the light emitting element EL is greatly damaged. According to this modification, even in such a case, the current of the light emitting element EL having an abnormality can be reliably diverted to the element bypass circuit, and the light emitting device 1 with high safety can be obtained.

  A light-emitting device that is one configuration of the illumination device according to the second embodiment of the present invention will be described mainly with reference to FIGS. As shown in FIGS. 1A and 1B, in the light emitting device 1 of the present embodiment, a plurality of organic EL elements (light emitting elements a, b, c... Z) are connected in series to a power supply device 10. The protection circuit unit 11 including the above-described element bypass circuit is provided for at least two light-emitting elements (in this example, light-emitting elements a and b). In the present embodiment, for example, in a configuration in which two light emitting modules 2a as shown in FIG. 1A are connected in series via a connector 4 or a long module such as a light emitting module 2b, 2 is used. This is applied to a configuration in which two organic EL elements (light emitting elements) are built. The protection circuit unit 11 is built in the connector 4 in the former example, and is incorporated in the lighting circuit in the module of the light emitting module 2b in the latter example.

  As shown in FIG. 10, the protection circuit unit 11 receives the load voltages of the two light-emitting elements a and b and the two element bypass circuits BCa and BCb connected in parallel to the two light-emitting elements a and b, respectively. Detection circuits 14a and 14b for detection. Further, the protection circuit unit 11 includes a comparison circuit 15 that compares the load voltages detected by the detection circuits 14a and 14b, and a determination circuit 16 that operates based on the difference between the load voltages compared by the comparison circuit 15. Have. When the difference between the load voltages compared by the comparison circuit 15 is equal to or greater than a predetermined value, the determination circuit 16 causes the current I flowing through the light emitting element a (or b) having a high load voltage to be supplied to the light emitting element a (b). The element bypass circuit BCa (b) connected in parallel is made conductive.

  FIG. 11 shows a basic operation flow of the protection circuit unit 11. When the power supply device 10 is turned on, the detection circuits 14a and 14b detect the load voltages of the light emitting elements a and b, respectively. Then, each load voltage is compared by the comparison circuit 15. For example, if the difference between the load voltages of the light emitting elements a and b is less than 4V, the determination circuit 16 determines that there is no abnormality in the light emitting elements a and b. On the other hand, if the difference between the load voltages of the light emitting elements a and b is 4 V or more and the light emitting element a <the light emitting element b, the determination circuit 16 determines that the light emitting element a is abnormal and sets the element bypass circuit BCa to Make it work. If the difference between the load voltages of the light emitting elements a and b is 4 V or more and the light emitting element a> the light emitting element b, the determination circuit 16 determines that the light emitting element b is abnormal and sets the element bypass circuit BCb. Make it work.

  FIG. 12 shows a specific circuit configuration of the light emitting device 1. In addition, illustration of light emitting elements (c ... z) other than the power supply device 10 and the light emitting elements a and b is omitted. The light emitting elements a and b are electrically connected in series, and the anode of the light emitting element a and the cathode of the light emitting element b are connected to the power supply device 10 (see FIG. 11), respectively. The element bypass circuits BCa and BCb are electrically connected to the anode A and the cathode B (the anode of the light emitting element b) of the light emitting element a and the cathode C of the light emitting element b, respectively. The detection circuits 14a and 14b are composed of operational amplifiers OP1a and OP1b. The operational amplifier OP1a receives the voltages of the anode A and the cathode B of the light emitting element a and outputs the operating voltage of the light emitting element a. Similarly, the operational amplifier OP1b receives the voltage difference between the anode of the light emitting element b (the cathode B of the light emitting element a) and the cathode C, and outputs the operating voltage of the light emitting element b.

  Zener diodes ZDa and ZDb are connected to the output portions of the operational amplifiers OP1a and OP1b, and when the drive voltage of the light emitting elements a and b rises with time, a predetermined upper limit voltage is output. The upper limit voltage here is, for example, a value smaller than the voltage increased due to a change over time, such as an arbitrary value between the minimum value and the maximum value of the initial voltage of the light-emitting elements a and b, and Any value may be used as long as it is larger than the voltage of b. The voltages of the light emitting elements a and b output from the operational amplifiers OP1a and OP1b are input to the comparison circuit 15.

  The comparison circuit 15 includes comparators CMPa and CMPb, and outputs a difference between the load voltages input from the operational amplifiers OP1a and OP1b. The determination circuit 16 includes an abnormality determination unit 16a of the light emitting element a and an abnormality determination unit 16b of the light emitting element b each including a switch element and the like. The output from the comparison circuit 15 is received and the voltage difference becomes a predetermined value or more. Sometimes trigger signals are output to the element bypass circuits BCa and BCb.

  The element bypass circuits BCa and BCb are composed of thyristors SCRa and SCRb. When a trigger signal is input from the determination circuit 16, the thyristors SCRa and SCRb are turned on to short-circuit between the anode and the cathode of any one of the light emitting elements a and b. Thus, the protection operation of the light emitting elements a and b is performed.

  FIG. 13 is a timing chart of the operation of the protection circuit unit 11. FIG. 13A shows an operation when the light emitting element b is short-circuited during the rated operation. When the light emitting element b is short-circuited and its load voltage becomes a predetermined voltage value or less, a trigger signal is output from the abnormality determination unit 16b of the determination circuit 16. When the element bypass circuits BCa and BCb receive the trigger signal input from the determination circuit 16, the thyristor SCRb is turned on to bypass the current to the light emitting element b.

  FIG. 13B shows an operation when the light-emitting device 1 is activated with the light-emitting element b in a short-circuit failure state. Since the power supply device 10 performs the soft start, the output current is gradually increased from 0 A to the current value of the rated current. Since the light emitting element a which is an organic EL element has diode characteristics, the current starts to flow and increases to the threshold voltage at the same time. On the other hand, when the light emitting element b is short-circuited, the load voltage gradually increases in proportion to the input current due to its resistance characteristic. Therefore, the voltage difference between the light emitting elements a and b reaches a predetermined voltage difference almost simultaneously with the start-up, and the element bypass circuit BCb bypasses the current to the light emitting element b.

  In this way, the light emitting device 1 of the present embodiment stops the driving of the light emitting element (organic EL element) having an abnormality such as a short circuit failure based on the potential difference between the two light emitting elements connected in series. The device can be prevented from being damaged by the heat generated. In particular, even if a large number of unspecified light-emitting elements are collectively controlled, an abnormality can be detected and a protective operation can be performed.

  As shown in FIG. 14, the protection circuit unit 11 is built in the connector 4 that connects the two light emitting modules 2a (a, b), and each light emitting module (light emitting element EL (a) (b)) and power source. The apparatus 10 (see FIG. 10) may be configured to be detachable (see also FIG. 1 (a)). By providing the protection circuit unit 11 separately, the number of light emitting modules 2a (light emitting elements EL) to be connected can be easily changed.

  As shown in the figure, when the light emitting element EL and the element bypass circuit BC are arranged between the anode line connected by the anode terminals 24a and 23a and the cathode line connected by the cathode terminals 24b and 23b, The current flow is as follows: anode terminal 24a → light emitting element EL or element bypass circuit BC → cathode terminal 23b. Therefore, the connector 4 that connects the adjacent light emitting modules 2a (a, b) has a line M that connects the cathode terminal 23b of the light emitting module 2a (a) and the anode terminal 24a of the light emitting module 2a (b). Is provided. Further, the protection circuit unit 11 incorporated in the connector 4 applies the load voltage of the light emitting element EL (a) of the light emitting module 2a (a) between the anode terminal 23a and the line M to the anode terminal 23a, the line M, and the cathode terminal 24b. In the meantime, the load voltage of the light emitting element EL (b) of the light emitting module 2a (b) is detected. In this way, by incorporating the protection circuit unit 11 into a peripheral device such as the connector 4, the configuration of the light emitting device 1 can be simplified.

  Further, as shown in FIG. 15, the protection circuit unit 11 may be mounted on a wiring board 25a that supplies power to the two light emitting elements ELa and ELb. An intermediate electrode M is provided between the light emitting elements ELa and ELb, and the protection circuit unit 11 is connected to the anode of the light emitting element ELa, the intermediate electrode M, and the light emitting element ELb, respectively. This configuration is suitably used in a configuration in which two light emitting layers are incorporated in one light emitting module 2b as shown in FIG. According to this configuration, a configuration including the protection circuit unit 11 can be realized with a minimum number of components.

  The circuit configuration shown in FIG. 15 can be realized by providing an intermediate electrode between two organic light emitting layers connected in series. FIGS. 16A and 16B show a configuration example of the light-emitting panel 25 having the organic EL element as described above. The light emitting panel 25 includes a transparent substrate 25a ′, an anode layer 25c separated on the transparent substrate 25a ′ by the insulating layer 25b, and an organic light emitting layer 25d provided on each of the separated anode layers 25c. A cathode layer 25f separated by a layer 25e. This is sealed by the sealing layer 25g. The insulating layer 25e suppresses contact with the organic light emitting layer 25d and the cathode layer 25f, while one cathode layer 25f is in contact with the other anode layer 25c, and this contact portion is drawn out of the sealing layer 25g. This is the intermediate electrode M. In addition, one anode layer 25c and the other cathode layer 25f are partly drawn out of the sealing layer 25g to become an anode terminal A and a cathode terminal B, respectively.

  FIGS. 17A and 17B show a configuration in which two organic light emitting layers 25d are stacked. The intermediate electrode M is made of a transparent conductive material. According to the configuration shown in FIGS. 16 and 17, the configuration of the terminals is simplified, and thus the protection circuit unit 11 can be easily incorporated in the module.

  The configuration described in this embodiment is independent of the operation example of the element bypass circuit using the difference between the rated current mode described in the first embodiment and the minute current mode. Can be implemented.

  A light-emitting device that is one configuration of the illumination device according to the third embodiment of the present invention, particularly a power supply device, will be described mainly with reference to FIGS. In the said embodiment, as shown to Fig.1 (a) etc., the light emitting modules 2a-2b are connected to the light emitting module 2c arrange | positioned at the edge part of the base part 3 in the state with which the base part 3 was mounted | worn. A configuration in which the power supply apparatus 10 is electrically connected via the input connector 5 is also shown (see also FIG. 2). And in the said structure, it illustrated that the power supply device 10 was arrange | positioned by the ceiling back and the wall back in which the base part 3 is installed (for example, refer also to Unexamined-Japanese-Patent No. 2014-056725 etc.). However, there is a case where there is not enough space for installing the power supply device 10 on the ceiling or the like where the base unit 3 is installed. Even in such a case, the installation on the ceiling or the like involves troublesome work. Further, the power supply device 10 is appropriately selected in consideration of the specifications and the number of the light emitting modules 2, but when various light emitting modules 2 can be mounted on the base portion 3 as in the above embodiment, The power supply device 10 also needs to be replaced as appropriate.

  Therefore, as shown in FIGS. 18 and 19A and 19B, the power supply device 10 according to the present embodiment is configured to be detachable from the base portion 3, similarly to the light emitting module 2. The power supply device 10 is configured such that, when mounted on the base portion 3, the length along the short direction is equal to the length of the base portion 3 in the short direction. Thereby, for example, even when the plurality of base portions 3 are arranged in a plurality of rows, the power supply device 10 can be displayed with good appearance without contacting the light emitting module 2 and the power supply device 10 mounted on the adjacent base portions 3. Part 3 can be attached.

  Further, the power supply device 10 includes a circuit board 126 (see FIGS. 19A to 19C) on which various circuits such as the above-described AC / DC converter are mounted, and a case 127 that accommodates them. As illustrated, the various circuits may be mounted on the surface of the circuit board 126 on the mounting surface 102A side, or may be mounted on the surface on the opposite side, although not shown.

  Further, one end portion of the mounting surface 102A facing the base portion 3 of the case 127 has an engaging portion 121 that engages with the engaged portion 32 of the base portion 3, and the other end portion of the mounting surface 102A has A slidable holding portion 122 that engages with the held portion 33 is provided (see FIG. 18 again). The case 127 is formed of the same resin material as the case 28 of the light emitting module 2.

  For electrical connection between the power supply device 10 and the light emitting module 2, a connector 4 for connecting the light emitting modules 2a to 2c is used. Thus, by sharing the connector 4, it is possible to reduce the number of parts necessary for configuring the light emitting device 1. Note that, in the illustrated example, as will be described later, a power supply device 10 including a three-pole terminal to which a signal line is added in addition to a pair of power supply lines and a connector 4 corresponding thereto are shown.

  Similarly to the light emitting module 2, the power supply device 10 has output terminals 123 and 124 (terminal portions) that are erected from the mounting surface 102 </ b> A facing the base portion 3 and inserted into the connector 4. These output terminals 123 and 124 are provided at both ends of the mounting surface 102A in the direction orthogonal to the direction connecting the engaging portion 121 and the holding portion 122, respectively. The output terminals 123 and 124, the anode terminals 123a and 124a, the cathode terminals 123b and 124b, and the signal terminals 123c and 124c are all terminals that protrude like a blade. The power supply device 10 also has an input terminal 125 connected to an external power supply line. The input terminal 125 includes an anode terminal 125a, a cathode terminal 125b, and a signal terminal 125c provided at an intermediate position between the engaging portion 121 and the holding portion 122 near the center of the case 127, and has a hole shape into which an external power supply line is inserted. Terminal.

  According to this configuration, as shown in FIG. 20, as with the light emitting module 2, the power supply device 10 is attached to the base unit 3, and at the same time, the output terminals 123 and 124 are inserted into the connector 4. Electrical connection with the light emitting module 2 becomes possible.

  FIG. 21 shows a circuit configuration of the power supply device 10. The power supply device 10 includes an AC / DC converter circuit, a DC / DC converter circuit, and the like including a transformer T for converting AC power into DC power, a bridge circuit DB, and a power factor correction (PFC) circuit. In response, for example, a constant voltage of 24 VDC is output. Although the illustrated example shows a flyback converter, other circuit systems may be used as long as the power supply has an AC / DC power conversion function. Further, the power supply device 10 includes a dimming signal generation circuit 18 including a receiving unit and a control unit such as a microcomputer. The dimming signal generation circuit 18 outputs a dimming signal to the light emitting module 2 connected to the power supply device 10.

  According to such a configuration, the engaged portion 121 and the holding portion 122 of the power supply device 10 are engaged with the engaged portion of the base portion 3 in the same manner as the light emitting module 2 shown in FIGS. The power supply device 10 can be attached to the base portion 3 by engaging with the holding portion 33 and the hold portion 33. Thereby, according to the light-emitting device 1 of this embodiment, even when there is not enough space for arranging the power supply device 10 on the back of the ceiling or the like, the power supply device 10 can be easily performed without requiring troublesome construction work. Can be attached to. Further, since the holding portion 122 is slidable, the power supply device 10 can be easily detached from the base portion 3 and can be appropriately replaced with the power supply device 10 adapted to the characteristics of the light emitting module 2.

  As shown in FIG. 22, the power supply device 10 has an output terminal 128 extending outside the case 127, and the output terminal 128 has terminal receiving grooves 128 a, 128 b, and 128 c formed therein. It may be. According to this configuration, the power supply terminals 23, 24 of the light emitting module 2 can be directly connected to the terminal receiving grooves 128 a of the output terminal 128 of the power supply device 10. It is not necessary to use the connector 4 for the connection between the light emitting module 2 and the light emitting module 2, and the number of parts can be reduced.

  Further, when the dimming signal generation circuit 18 is provided on the light emitting module 2 side (or other than that), the power supply device 10 may be configured not to include the dimming signal generation circuit 18. . In this case, as shown in FIG. 23, the output terminal 123 does not have a signal terminal, and only has an anode terminal 123a and a cathode terminal 123b. The output terminal 123 may be provided at one end, and the input terminal 125 may be provided at the other end. According to this configuration, since the circuit configuration is simplified, the power supply device 10 can be simplified and downsized. Further, for example, the power supply device 10 having the same size as that of the 1 × 1 type light emitting module 2a as shown in FIG. 4A can be obtained.

  Note that the configuration described in this embodiment can be implemented independently without necessarily applying the element bypass circuit described in the first and second embodiments.

  A light-emitting device that is one configuration of the illumination device according to the fourth embodiment of the present invention will be described mainly with reference to FIGS. As shown in FIG. 24A, for example, each of the plurality of light emitting modules 2 has two ports, which are connected in parallel to the signal line L1 and the ground line L2 of the PWM dimming signal. In each case, in each light emitting module 2, one functions as an input port and the other functions as a feed wiring port. However, in this case, since the capacitance components of the input ports of the light emitting modules 2 are added together, the waveform of the PWM dimming signal may become dull.

  In addition, as shown in FIG. 24B, after the input port receives the PWM dimming signal, the input port generates a PWM dimming signal having the same waveform as the received PWM dimming signal and outputs it to the sending wiring port. is there. However, in this case, since the input port and the feed wiring port are fixed, the arrangement direction of the light emitting module 2 is restricted. For example, the power supply apparatus 10 as shown in the third embodiment has output terminals 123 and 124 at both ends of the apparatus, and the light emitting module 2 can be connected to both terminals. In this case, the port (power supply terminal) on the side connected to the power supply device 10 serves as an input port, and the port not connected to the power supply device 10 serves as a feed wiring port. Therefore, in order to increase the degree of freedom of arrangement of the light emitting module 2 and the power supply device 10, it is desirable that each port is configured to function as both an input port and a feed wiring port. The light emitting device 1 of the present embodiment fulfills the above request.

  As shown in FIG. 25, the light emitting device 1 of the present embodiment uses a light emitting module 2 in which a light emitting element EL and a control circuit unit 19 for controlling a dimming signal of the light emitting element EL are incorporated in one device. ing. The control circuit unit 19 includes a signal input circuit 19c that inputs the dimming signal received from the power supply device 10 or the adjacent light emitting module 2 to the lighting circuit 19a (D / A circuit 19b) of the light emitting element EL, and the received PWM dimming. A waveform forming unit 19d that generates a dimming signal for transmission having the same waveform as the signal. In this example, since a PWM dimming signal is used, a D / A circuit 19b for converting this digital signal into an analog signal input to the lighting circuit 19a is incorporated.

  The signal input circuit 19c includes two ports P1 and P2 that transmit and receive a dimming signal between the power supply device 10 and the adjacent light emitting module 2. For example, when the dimming signal is input to one port P1, The dimming signal is input from the port P1 to the lighting circuit 19a, the dimming signal input from the other port P2 is blocked, and the dimming signal for transmission generated by the waveform forming unit 19d from the other port P2 is transmitted. Output. The two ports P1 and P2 respectively have switches SW1 and SW2 connected to an input line of a dimming signal to the lighting circuit 19a, and the switches SW1 and SW2 are dimmed to the ports P1 and P2 to which they are connected. Using the input of the optical signal as a trigger, the input line from the port to the lighting circuit 19a is made conductive, and the input line from the other port to the lighting circuit 19a is cut off.

  Specifically, four switches S1, S2, S3, and S4 are arranged on the signal line L1, and an input line to the lighting circuit 19a is led out between the switches S2 and S3 that are in the middle. The switches S1 and S4 are closed in the initial state, and the switches SW1 and SW2 open and close the switches S2 and S3, respectively, triggered by the input of the dimming signal to the ports P1 and P2 to which they are connected. The input line from the port to the lighting circuit 19a is turned on or off.

  For example, as shown in FIG. 26, when a dimming signal is input to the port P1, the switch SW1 is turned on and the switches S2 and S6 are closed, while the switch S4 that was on in the initial state is set to NOT1. Open through. Thereby, the switch SW conducts the input line (switch S2) from the port P1 to the lighting circuit 19a using the input of the dimming signal to the port P1 to which the switch SW is connected as a trigger, and the lighting circuit from the other port P2 The input line (switch S4) to 19a is cut off. Further, by closing the switch S6, the dimming signal for transmission generated by the waveform forming unit 19d is output from the other port P2.

  On the other hand, as shown in FIG. 27, when a dimming signal is input to the port P2, the switch SW2 is turned on to close the switches S3 and S5, while the switch S1 that was on in the initial state is changed to NOT2. Open through. Thereby, the switch SW conducts the input line (switch S3) from the port P2 to the lighting circuit 19a using the input of the dimming signal to the port P2 to which the switch SW is connected as a trigger, and the lighting circuit from the other port P1. The input line (switch S1) to 19a is cut off. Further, by closing the switch S5, the dimming signal for transmission generated by the waveform forming unit 19d is output from the other port P1.

  As described above, according to the light emitting device 1 of the present embodiment, the two ports P1 and P2 provided in the light emitting module 2 can also serve as the input port and the feed wiring port, and the plurality of light emitting modules 2 are connected to the PWM dimming signal. Even when the signal lines are connected in parallel, the waveform of the PWM dimming signal can be prevented from being dull.

  Further, according to the present embodiment, even if the number of light emitting modules 2 increases, the output current of the power supply device 10 does not increase, so that the design of the output capacity of the dimming signal in the power supply device 10 is facilitated. Further, since the capacity component of the dimming signal input does not increase, even if the number of P light emitting modules 2 increases, the waveform of the WM dimming signal does not become dull and the dimming ratio can be kept constant.

  A modification of the above embodiment will be described with reference to FIGS. In this modification, as shown in FIG. 28, the operation of the signal input circuit 19c of the above embodiment is realized by the microcomputer 19e, and the ports P1 and P2 are the input / output ports [1] and [2] of the microcomputer 19e. ]. Then, as shown in FIG. 29, when the light emitting module 2 is connected to the power supply device 10, the microcomputer 19e checks whether the setting of the PWM port is completed. When the setting of the PWM port is completed, the dimming level is set based on the received PWM dimming signal, and the light emitting element EL is controlled to be turned on. On the other hand, if the setting of the PWM port is not completed, first check whether there is a dimming signal input to the input / output port [1], and if there is a dimming signal input to the input / output port [1], The output port [2] is set as an output port, and the received dimming signal is output from the input / output port [2]. On the other hand, when there is no dimming signal input to the input / output port [1], it is checked whether the dimming signal is input to the input / output port [2], In some cases, the input / output port [1] is set as an output port, and the received dimming signal is output from the input / output port [1]. Thereby, the same operation as the signal input circuit 19c shown in the above embodiment can be executed.

  The configuration described in this embodiment can also be implemented independently without necessarily applying the element bypass circuit described in the first and second embodiments.

  A light-emitting device that is one configuration of the illumination device according to the fifth embodiment of the present invention will be described mainly with reference to FIGS. 30 to 37. By the way, in the organic EL element, since the light emitting layer is formed of an organic polymer material, a flexible light emitting element can be obtained by using a transparent material having flexibility for a substrate or the like. However, materials constituting the flexible light-emitting element include those having stretchability and those having no stretchability, and if the material without stretchability is forced to bend, the element may be damaged. Thus, a planar illumination device is known that is configured to expand and contract in a state of being attached to an element by processing a non-stretchable material into a bellows shape (for example, Japanese Patent No. 498754). In this case, when the reflecting sheet having a bellows shape is curved so that the element is concave on the reflecting sheet side, the convex portions of the bellows are brought into contact with each other, thereby suppressing the bending more than a predetermined amount. it can.

  However, this type of flexible light-emitting element cannot retain its shape in a bent state. Further, when the flexible light emitting element is bent excessively, the organic layer may be damaged and short-circuited. The light-emitting device of this embodiment includes a light-emitting module having a flexible light-emitting element that can maintain its shape in a bent state and can be prevented from being bent excessively. is there.

  As shown in FIGS. 30A and 30B and FIGS. 31A to 31C, the light emitting module 6 used in the light emitting device of this embodiment is a flexible light emitting element that is a planar light source having flexibility. (Hereinafter, the light emitting element 20) and the structure portion 7 supporting the light emitting element 20 are overlapped. Moreover, the structure part 7 has the band-shaped shape holding material 8 which can be plastically deformed, and the curvature limitation parts 71 and 72 which curve the structure part 7 only to one axial direction.

  In the light emitting element 20, functional layers such as an organic EL layer and an electrode layer are laminated on a flexible substrate and can be bent to a predetermined curvature. In this example, the light emitting element 20 is formed in a band length shape.

  The structure part 7 has a structure in which a shape holding part is sandwiched between two curvature restriction parts 71 and 72, and a substantially L-shaped light source holding part 72 a is disposed at both ends of one curvature restriction part 72. . The light source holding part 72 a has a claw-like structure that protrudes in a direction substantially perpendicular to the light emitting surface of the light emitting element 20. The light source holding part 72 a is preferably arranged so as to overlap with the non-light emitting part at the periphery of the light emitting element 20.

  The shape retaining material 8 is a member on a thin plate that can be plastically deformed, and for example, a material having a small yield stress, such as tin, is preferably used. In the present embodiment, the shape maintaining material 8 is formed in a band length shape that is substantially the same size as the light emitting element 20.

  The curvature limiting units 71 and 72 are composed of two surfaces that are divided in a direction perpendicular to the light emitting surface of the light emitting element 20, and limit the curvature in different directions. The curvature limiting portions 71 and 72 have a plurality of strip-shaped members 71a and 72b partitioned by a plurality of grooves 73a and 73b (see an enlarged view of FIG. 31C) formed in the uniaxial direction. Each strip-shaped member 71 a and 72 b is bonded to the shape holding material 8. The side walls in the bending axis direction of the strip-shaped members 71a and 72b are tapered, and the ends of the adjacent strip-shaped members 71a and 72b are in contact with each other, thereby limiting the curvature of the structure portion 7 with a predetermined curvature. Each strip-shaped member 71a, 72b has a shape in which the taper direction is opened opposite to each other.

  For example, in a light-emitting device using the light-emitting element 20 having a radius of curvature of 75 mm and a length of 200 mm, when the width of the strip-shaped members 71 a and 72 b is 10 mm, the taper angle is in the vertical direction according to the following formula (1). The angle is about 3.82 ° (see FIG. 31 (c)).

  At this time, as shown in FIGS. 32 (a) and 32 (b), the light emitting module 6 can be curved to a predetermined curvature (152 ° in the illustrated example) limited by the curvature limiting portions 71 and 72, and more. Excessive bending and bending can be suppressed. Therefore, physical damage or the like of the organic layer of the light emitting element 20 can be suppressed due to excessive bending or the like. Further, since the curvature limiting portions 71 and 72 are constituted by a plurality of strip-shaped members 71a and 72b and have grooves 73a and 73b formed at regular intervals, the light emitting module 6 is deformed only at the positions of the grooves 73a and 73b. . Therefore, when the light emitting module 6 is bent, a beautiful arc shape with uniform curvature can be obtained. Furthermore, the arc shape can be maintained by the shape holding member 8.

  At least one end of the light emitting element 20 is fixed to the structure portion 7 (curvature limiting portion 72), and can be displaced with respect to the structure portion 7. For this reason, during the bending operation, the light emitting element 20 slides under the claw structure of the light source holding part 72a, thereby escaping the deviation between the light emitting element 20 and the structure part 7 due to the thickness of the light emitting module 6, and is applied to the light emitting element 20. Stress can be reduced.

  In the present embodiment, the two curvature limiting portions 71 and 72 are provided so as to make the bending limiting directions contradict each other. If it carries out like this, an excessive curve and bending | flexion with respect to bending of an uneven | corrugated both direction can be prevented. In addition, the shape retaining material 8 is disposed between the two curvature limiting portions 71 and 72. In this case, the curvature limiting portions 71 and 72 function as a cover for the shape retaining material 8, so that the shape retaining material 8 is not deformed except at positions corresponding to the grooves 73 a and 73 b, and the shape retaining material 8 is inadvertent. Deformation can be suppressed.

  In addition, the curvature limiting portions 71 and 72 have a detachment suppressing portion that suppresses the detachment of the shape maintaining material 8 on the outer peripheral edge thereof. Specifically, dents 71b and 72c are formed on the surfaces of the curvature limiting portions 71 and 72 facing the shape holding material 8, and the shape holding material 8 is accommodated in the dents 71b and 72c. The outer edges of 71b and 72c function as a detachment suppressing portion that suppresses the detachment of the shape maintaining material 8. By doing so, it is not necessary to bond the shape holding material 8 to the curvature limiting portions 71 and 72, and the shape holding material 8 is deformed in the recesses 71b and 72c during the bending operation, so that the stress applied to the shape holding material 8 is reduced. It is possible to suppress the structural deterioration of the shape maintaining material 8.

  Next, a modification of the above embodiment will be described with reference to FIGS. As shown in FIGS. 33A and 33B and FIGS. 34A to 34C, the light emitting module 6 according to this modification includes the light emitting element 20, the curvature limiting portions 71 and 72, and the shape maintaining material 8. It is held by the outer shell 74. The outer shell 74 has a bottom surface 74a provided along the curvature limiting portion 71, and a holding frame 74b formed by bending from the bottom surface 74a.

  In this modification, the widths of the grooves 73a and 73b of the curvature limiting portions 71 and 72 are, for example, the light-emitting element 20 having a curvature radius of 75 mm and a length of 200 mm, and the curvature limiting portions 71 and 72 have a thickness of 1 mm. In this case, it becomes about 0.133 mm according to the following formula (2). (Refer to the enlarged view of FIG. 34 (b)).

  In the present modification, the curvature limiting portion 72 that is in contact with the light emitting element 20 is made of a material having high thermal conductivity such as aluminum or copper. The curvature limiting unit 72 is closely attached (adhered) to the light emitting element 20, so that the heat generated in the light emitting element 20 can be radiated. The other curvature limiting portion 71 is affixed to the bottom surface of the outer shell 6. The curvature limiting unit 71 may have a groove structure on a different surface from the curvature limiting unit 72. Moreover, the material used for the curvature limiting part 71 does not need to be a material with high thermal conductivity.

  The outer shell 74 is made of a flexible material such as rubber or silicone, for example, and covers at least one pair of opposing side and bottom surfaces of the light emitting module 6 and a part of the peripheral edge of the surface of the light emitting element 20 to emit light. The element 20 and the structure part 7 are integrated. Further, the outer shell 74 can hold the shape holding material 8 and the curvature limiting portion 7 without bonding, and stress applied to the shape holding material 8 during the bending operation is dispersed over the entire surface, so that the structure of the shape holding material 8 can be obtained. Deterioration can be suppressed.

  Next, a light emitting module according to another modification of the above embodiment will be described with reference to FIGS. As shown in FIGS. 35 (a) and 35 (b) and FIGS. 36 (a) to 36 (c), the light emitting module 6 of the present modification includes the light emitting element 20 and the shape holding member 8 having two curvature limiting portions 71 and 72. It has a structure sandwiched between. One curvature limiting portion 72 has a substantially L-shaped claw structure 72d for fitting with the curvature limiting portion 71 at both ends on the short side, and the curvature limiting portion 71 has a recess 71c. By fitting the claw structure 72d into the recess 71c, the outline of the structure portion 7 that holds the light emitting element 20 and the shape retaining material 8 is fixed.

  The curvature limiting portion 72 that comes into contact with the light emitting element 20 is formed of, for example, a translucent resin such as acrylic resin, and a diffusion process for diffusing light is performed on the surface opposite to the light emitting element 20. According to this configuration, the light emitted from the light emitting element 20 is transmitted and diffused through the curvature limiting unit 72 and irradiated outside the light emitting module 6. That is, the structure 7 itself functions as a case for protecting the flexible light emitting element 20. Further, since the curvature limiting portion 72 has light diffusibility, for example, even when there is a non-light emitting portion at the periphery of the light emitting element 20, uniform light emission can be obtained as the entire light emitting module 6.

  Next, a light emitting module according to another modification of the above embodiment will be described with reference to FIGS. The light emitting module 6 of the present modification includes a power supply structure that is electrically connected to the power supply device 10 and supplies power to the light emitting element 20, and the shape holding member 8 functions as a power supply line.

  The shape retaining member 8 includes two conductive members 8a and 8b that are spaced apart from each other, and an insulating plate 8c that is disposed between them. The conductive members 8a and 8b have physical properties that can be plastically deformed, as in the above-described embodiment and modification. The insulating plate 8c has predetermined flexibility in addition to conductivity. The conductive members 8a and 8b have power supply portions 81a and 81b extending at one end, respectively, and connection portions 82a and 82b extending at the other end, respectively. Connection portions 20a and 20b are also extended at one end of the light emitting element 20, and these connection portions 82a and 82b and 20a and 20b are connected by clips 83a and 83b.

  Further, since the power supply portions 81a and 81b have different widths and the width of the terminal receiving groove of the power supply device 10 corresponds to that, the power supply portion 81a is mistakenly attached when the light emitting module 6 is attached to the power supply device 10. , 81b can be prevented from being attached in reverse. In addition, the support parts 71a and 71b from which a part of the curvature limiting part 71 is extended structurally support the power feeding parts 81a and 81b.

  According to this modification, the conductive members 8 a and 8 b constituting the shape maintaining material 8 also serve as a power feeding structure for the light emitting element 20. Therefore, it is not necessary to provide a separate wiring structure, and the configuration of the light emitting module 6 can be simplified. Further, as shown in the figure, if the light emitting module 6 is mounted so as to be erected with respect to the power supply device 10 and the light emitting module 6 is bent and deformed, a unique light emitting device rich in design and the same are used. A lighting fixture can be obtained.

  A light-emitting device that is one configuration of the illumination device according to the sixth embodiment of the present invention will be described mainly with reference to FIGS. 38 to 41. 2. Description of the Related Art Conventionally, there is a light emitting device that can hold the shape of a light emitting element by integrating a thin plate having a shape memory function with the flexible light emitting element used in the fifth embodiment. It is known (for example, refer to JP2013-210491A).

  However, when a thin plate having a shape memory function is entirely bonded to a flexible light emitting element, an organic EL element having a lower strength than the thin plate having a shape memory function is pulled by the thin plate due to a difference in inner diameter at the time of bending. There is a possibility that the surface of the element may wave and deteriorate in appearance. The light emitting module used in the light emitting device according to the present embodiment can maintain the shape of the flexible light emitting element with a simple configuration and does not apply unnecessary force to the light emitting element during bending.

  As shown in FIG. 38A, the light emitting module 6 used in the light emitting device of the present embodiment includes a flexible light emitting element (hereinafter referred to as a light emitting element 20) which is a flexible planar light source, and the light emitting element 20. The support portion 9 that supports the structure is superposed.

  The support portion 9 includes a plastic stretchable body 90 that includes a plurality of curved portions 9a and a plurality of bent portions 9b. The plastic stretchable body 90 is a linear fibrous material that undergoes plastic deformation, and at least one is disposed on the back surface of the light emitting element 20 as shown in FIG. Even if the number of the plastic expansion-contraction bodies 90 is one, it has a two-dimensional expanse and is arrange | positioned at the predetermined area at the waveform. Further, as shown in FIG. 38 (b), if a plurality of plastic stretch bodies 90 are used, the plastic stretch bodies 90 can be provided over a wide range.

  According to this configuration, when the light emitting module 6 is curved inward with the light emitting surface of the light emitting element 20, the bent portion 9 b is expanded, the gap between the curved portions 9 a is increased, and the entire length of the plastic stretchable body 90 is extended. The plastic stretchable body 90 maintains its shape. On the other hand, when the light emitting module 6 is bent to the inner side with the back surface of the light emitting element 20, the bent portion 9b is narrowed, the gap between the curved portions 9a is reduced, the entire length of the plastic elastic body 90 is reduced, and the plastic elastic body 90 is compressed. Maintains its shape.

  Moreover, one of the support part 9 and the light emitting element 20 has at least two connection parts 91 connected to the other. By attaching the plastic stretchable body 90, which is a linear fibrous material, to the light emitting element 20 with relatively few connection portions 91, the flexible light emitting element 20 can be maintained in shape with a simple configuration, and unnecessary force during bending can be obtained. The light emitting element 20 can be prevented from being applied. In addition, it is preferable that the connection part 91 is provided in the end part vicinity of either the support part 9 or the light emitting element 20. FIG. In this way, when the light emitting module 6 is bent, the distance between the support portion 9 and the light emitting element 20 can be easily increased, and it is possible to make it difficult to apply unnecessary force to the light emitting element 20.

  Moreover, as shown in FIG.38 (c), as for the support part 9, it is more preferable that the some plastic expansion-contraction body 90 is comprised so that it may mutually have a contact. As a result, the plastic elastic bodies 90 are deformed in a complex manner during bending, so that the plastic elastic body 90 can be deformed into various shapes, and the light emitting module 6 is deformed into an arbitrary shape and the shape is maintained. be able to. At this time, as shown in the figure, the connecting portion 91 is preferably formed in a linear shape. In this way, a large number of plastic stretchable bodies 90 can be suitably fixed to such an extent that unnecessary force is not applied to the light emitting element 20. If the support part 9 and the light emitting element 20 are connected to the connection part 91 with an adhesive agent, they can be easily fixed.

  In FIGS. 39 and 40A to 40C, the support portion 9 is configured as a woven fabric 92. Since the woven fabric 92 has not only two dimensions but also three dimensions (see FIG. 40B in particular), the fabric 92 can be expanded and contracted in a larger range, and the light emitting module 6 can be formed in various shapes. Can be transformed into

  Moreover, when the support part 9 is comprised as the textile body 92, as shown to FIG. 41 (a) (b), as the connection part 91, the support part 9 is provided in the protrusion 93 provided in the back surface of the light emitting element 20. As shown in FIG. Is preferably locked. By so doing, the protrusions 93 are merely locked to the mesh of the fabric body 92, so that the support portion 9 can be easily attached to the light emitting element 20.

  In addition, the light-emitting device which concerns on this invention, and an illuminating device using the same are not limited to the said embodiment and its modification, A various deformation | transformation is possible. Any of the first to sixth embodiments described above can be implemented independently, and whether or not to implement in combination with other embodiments is arbitrary. In particular, in the fifth and sixth embodiments, the configuration described in the first to fourth embodiments may not be applied, or may be implemented in combination. Moreover, the form which makes the light emitting module 2 apparatus the base part 3 as shown in the said 1st-4th embodiment is only the illustration on comprising a light-emitting device except 3rd Embodiment. . Moreover, the light emitting element of the light emitting module 2 is not limited to an organic EL element, For example, it can apply also to LED.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 10 Illuminating device 11 Protection circuit part 121 Engagement part 122 Holding part 102A Mounting surface 14a, 14b Detection circuit 15 Comparison circuit 16 Determination circuit 19 Control circuit part 19d Waveform formation part 123, 124 Output terminal (terminal part)
2 Light emitting module 20 Light emitting element (planar light source)
25a Wiring board 3 Base portion 32 Holding portion 33 Holding portion 4 Connector 41 Connection portion 42 Projection 7 Structure portion 71, 72 Curvature limiting portion 71b, 72c Depression (detachment suppressing portion)
8 Shape holding material 9 Support portion 9a Bending portion 9b Bending portion 90 Plastic contraction body 91 Connection portion 92 Fabric body BC, BC1, BCa, BCb Element bypass circuit BC Resistance bypass circuit EL Light emitting element P1, P2 Port R0 Series resistance SW1, SW2 switch

Claims (38)

A light emitting device comprising: a light emitting element; and a power supply device that supplies power to the light emitting element.
An element bypass circuit connected in parallel with the light emitting element;
A light-emitting device, wherein a current flowing through the light-emitting element is diverted to the element bypass element according to a load voltage of the light-emitting element. The power supply device executes a rated current mode for supplying a rated current of the light emitting element, and a minute current mode for supplying a minute current that is smaller than the rated current,
The element bypass circuit includes a load voltage of the light emitting element in the minute current mode, a load voltage of the light emitting element in the rated current mode, and a quotient obtained by dividing the value of the minute current by the value of the rated current. The light-emitting device according to claim 1, wherein the light-emitting device conducts when substantially matching the product. A resistance bypass circuit provided in parallel with a series resistor connected in series with the light emitting element;
The light-emitting device according to claim 2, wherein the resistance bypass circuit is turned on when the element bypass circuit is not turned on.   4. The light emitting device according to claim 2, wherein the power supply device executes the rated current mode after executing the minute current mode at the start of lighting of the light emitting element. 5.   The light-emitting device according to any one of claims 2 to 4, wherein the power supply device periodically switches between the minute current mode and the rated current mode. The two light emitting elements are connected in series, and the element bypass circuit is connected in parallel to the two light emitting elements, respectively.
The two element bypass circuits, a detection circuit that detects load voltages of the two light emitting elements, a comparison circuit that compares load voltages detected by the detection circuit, and the load that is compared by the comparison circuit A determination circuit that operates based on the voltage difference, and further includes a protection circuit unit.
The determination circuit makes the element bypass circuit connected in parallel to the light emitting element conduct current flowing through the light emitting element having a high load voltage when the difference between the load voltages is a predetermined value or more. The light emitting module according to claim 1.   The light emitting device according to claim 6, wherein the protection circuit unit is configured to be detachable from both the light emitting element and the power supply device.   The light-emitting device according to claim 6, wherein the protection circuit unit is built in a connector that electrically connects the two light-emitting elements.   The light emitting device according to claim 6, wherein the protection circuit unit is mounted on a wiring board that supplies power to the two light emitting elements.   The light emitting apparatus according to claim 6 or 9, wherein the two light emitting elements are incorporated in one device to form a light emitting module. A flat plate-shaped light emitting module incorporating the light emitting element; and a long base portion on which a plurality of the light emitting modules are detachably mounted, and
The light-emitting device according to claim 1, wherein the power supply device is configured to be detachable from the base portion. A pair of sides extending in the longitudinal direction of the base portion are parallel to each other,
The length in the short direction of the base part is configured to be equal to the length in the short direction of the base part of the light emitting module and the power supply device mounted on the base part. 11. The light emitting device according to 11. The base portion has an engaged portion and a held portion used for mounting the light emitting module, respectively, over one side and the other side extending in the longitudinal direction,
The light emitting module and the power supply device are provided on a mounting surface facing the base portion when mounted on the base portion, and an engaging portion that engages with the engaged portion, and the other end of the mounting surface The light emitting device according to claim 12, further comprising: a holding portion that is provided on the holding portion and engages with the held portion.   The base portion is disposed at a boundary position between the light emitting modules or the light emitting modules adjacent to each other when the plurality of light emitting modules or the power supply devices are mounted adjacent to each other along the longitudinal direction of the base portion. The light-emitting device according to claim 13, further comprising a connector that electrically connects them to each other. The light emitting module and the power supply device have a terminal portion that is erected from a mounting surface facing the base portion and is inserted into the connector,
The light emitting device according to claim 14, wherein the terminal portions are respectively provided at both end portions in a direction perpendicular to a direction connecting the engaging portion and the holding portion on the mounting surface. The light emitting element and a control circuit unit for controlling a dimming signal of the light emitting element are incorporated in one device to form a light emitting module,
The control circuit unit includes a signal input circuit that inputs a dimming signal received from the power supply device or the adjacent light emitting module to a lighting circuit of the light emitting element, and dimming for transmission having the same waveform as the received dimming signal. A waveform forming unit for generating a signal,
The signal input circuit includes two ports that transmit and receive a dimming signal between the power supply device and the adjacent light emitting module, and when the dimming signal is input to one of the two ports, The dimming signal is input from the port to the lighting circuit, the input of the dimming signal from the other port is blocked, and the dimming signal for transmission generated by the waveform forming unit from the other port The light-emitting device according to claim 1, wherein The two ports each have a switch connected to an input line of the dimming signal to the lighting circuit,
The switch triggers an input of the dimming signal to a port to which the switch is connected, and conducts an input line from the port to the lighting circuit, and blocks an input line from the other port to the lighting circuit. The light-emitting device according to claim 16.   As the two ports, microcomputer input / output ports are used, both input ports are set as an initial state, and when the dimming signal is input to one port, the other port is used as an output port. The light emitting device according to claim 16, wherein the setting is changed. The light emitting element is a planar light source having flexibility, and a structure portion supporting the planar light source is overlapped to form a light emitting module.
The light emitting device according to claim 1, wherein the structure part includes a shape-retaining material that can be plastically deformed, and a curvature limiting part that curves the structure part only in a uniaxial direction.   The light emitting device according to claim 19, wherein at least one end of the planar light source is fixed to the structure and is displaceable with respect to the structure.   The curvature limiting portion has a plurality of strip-shaped members partitioned by a plurality of grooves formed in the uniaxial direction, and the ends of the adjacent strip-shaped members are in contact with each other, whereby the curvature of the structure portion The light-emitting device according to claim 19 or 20, wherein the light-emitting device is limited by a predetermined curvature.   The light emitting device according to any one of claims 19 to 21, wherein the two or more curvature limiting portions are provided so as to make the bending limiting directions opposite to each other.   The light-emitting device according to any one of claims 19 to 22, wherein the shape holding member is disposed between two or more curvature limiting portions.   24. The light-emitting device according to claim 23, wherein the curvature limiting unit includes a detachment suppressing unit that suppresses detachment of the shape holding material on an outer peripheral edge thereof.   The light emitting device according to any one of claims 19 to 24, wherein the curvature limiting unit is made of a high thermal conductivity material and is disposed on a back surface of the planar light source. The planar light source is disposed between two or more curvature limiting portions,
The light emitting device according to any one of claims 19 to 25, wherein at least one surface of the curvature limiting portion is made of a light transmissive material.   27. The light emitting device according to claim 26, wherein at least one surface of the curvature limiting portion functions as a light guide plate or a diffusion plate.   The light emitting device according to any one of claims 19 to 27, wherein the shape holding unit functions as a wiring that supplies power to the planar light source or transmits a control signal. The light emitting element is a planar light source having flexibility, and a support portion that supports the planar light source is overlapped to form a light emitting module.
The light emitting device according to claim 1, wherein the support portion includes a plastic stretchable body including a plurality of curved portions and bent portions.   30. The light emitting device according to claim 29, wherein the support has a plurality of the plastic stretchable bodies.   The light emitting device according to claim 30, wherein the plurality of plastic stretchable bodies have contact points with each other.   32. The light-emitting device according to claim 31, wherein the plurality of plastic stretch bodies constitute a woven body.   33. The light emitting device according to any one of claims 29 to 32, wherein any one of the support portion and the planar light source has at least two connection portions connected to the other.   The light emitting device according to claim 33, wherein the connection portion is provided in the vicinity of an end portion of either the support portion or the planar light source.   The light emitting device according to claim 33 or claim 34, wherein the connection portion is formed in a linear shape.   36. The light emitting device according to claim 33, wherein the connection portion connects the support portion and the planar light source by adhesion.   The light emitting device according to claim 33 or 34, wherein the connection portion is configured to lock the support portion on a protrusion provided on a back surface of the planar light source.   An illumination device comprising the light emitting device according to any one of claims 1 to 37.