JP5204864B2 - LED module and LED light source device - Google Patents

Description

  The present invention relates to an LED module on which an LED (light emitting diode) is mounted and an LED light source device.

  The transmissive liquid crystal display includes a backlight device as a light source on the back surface of the liquid crystal panel. Conventionally, CCFL (Cold Cathode Fluorescent Lamp) has been the main light source of the light source device used as the backlight. However, due to technological progress of LED, it is expected to use LED as a light source instead of CCFL. ing. For example, Patent Document 1 below describes a backlight device that uses LEDs as light emitting elements. In the following Patent Document 1, a light source device capable of surface irradiation of the entire screen is provided by mounting a plurality of LEDs on a substrate in a necessary number uniformly distributed on the surface. Such surface irradiation can also be realized by arranging a plurality of LED modules of linear light sources in which a plurality of LEDs are linearly arranged on a substrate, as described in Patent Document 2 below, for example. Moreover, when arrange | positioning several LED on a board | substrate, there exist the method of arrange | positioning each LED in parallel like the following patent document 1, and the method of arranging the predetermined number of each LED in series like the following patent document 3. .

  Therefore, an LED module in which a plurality of LEDs are arranged in a straight line on a substrate and connected in series, as shown in FIGS. 25 and 26, an anode terminal for pulling out the anodes and cathodes at both ends of the plurality of LEDs 1 connected in series. 3 and a cathode terminal 4 are provided on the substrate 2. In this case, a first case in which the anode terminal 3 and the cathode terminal 4 are arranged close to one end of the substrate 2 as shown in FIG. 25, and an anode terminal 3 is arranged at one end of the substrate 2 as shown in FIG. A second case in which the cathode terminal 4 is disposed at the other opposite end of the substrate 2 can be considered. In the case shown in FIGS. 25 and 26, as an example, LED modules 50 and 51 in which eight LEDs are connected in series are shown. However, FIGS. 25 (A) and 26 (A) each show a state before the LED is mounted, and FIGS. 25 (B) and 26 (B) each show a state where the LED is mounted.

  In each of the LED modules 50 and 51, nine connecting wires 11 to 19 for connecting eight LEDs 1 in series are formed on the insulating substrate 2, and the connecting wires 11 to 19 are connected to each other. The end portions are adjacent to each other and are continuously arranged. One end of the first connecting wire 11 is connected to the anode terminal 3, and an electrode 20 for connecting to the anode of one LED is formed on the other end, and the second to eighth connecting wires 12 to 18 are formed. An electrode 21 for connecting to the cathode of the LED is formed at each one end of the LED, and an electrode 20 for connecting to the anode of the LED is formed at the other end, respectively. One end is connected to the cathode terminal 4, and the other end is formed with an electrode 21 for connecting to the cathode of one LED. By connecting the anode and cathode of the LED between the electrodes 20 and 21 provided at the adjacent ends of the adjacent connecting wiring, eight LEDs 1 are connected in series in the forward direction between the anode terminal 3 and the cathode terminal 4. It becomes the connected LED module.

JP 2003-207780 A JP 2008-53062 A Japanese Utility Model Publication No. 62-34468

  A case where an LED light source device in which LEDs are arranged in a plane by arranging LED modules 50 in which the anode terminal 3 and the cathode terminal 4 shown in FIG. FIG. 27 shows a configuration diagram of the external wiring. For example, as shown in FIG. 27, when each LED module 50 is configured in parallel, a control board 42 that drives the LEDs of each LED module 50 and controls the light emission is provided outside, and the anode terminal of each LED module 50 16 and a total of 16 external wirings 52 connecting the cathode terminals 4 and the control board 42 are required, and the wiring of the external wirings from the LED modules 50 arranged away from the control board 42 is long. Here, the external wiring means wiring outside the LED module, and is referred to as “external wiring” in order to distinguish from the wiring for connection formed on the substrate in the LED module.

  FIG. 28 shows a wiring configuration diagram in the case where an LED light source device in which the LED modules 51 shown in FIG. 26 are arranged in a 2 × 4 matrix and the LEDs are arranged in a plane is configured. Compared with the LED module 50 shown in FIG. 25, since the anode terminal 3 and the cathode terminal 4 are arranged on opposite sides, external wiring for connecting the anode terminal 3 and the cathode terminal 4 of each LED module 50 and the control board 42. The number 52 is 16 as in the LED module 50, but the external wiring is further extended.

  Here, when the LEDs mounted on the two LED modules 50 or 51 are connected in series, the anode terminal 3 and the cathode terminal 4 of each LED module 50 and the control board 42 are connected as shown in FIGS. Although the external wiring 52 to be reduced is halved, there are still long external wirings.

  As described above, when a light source device such as a backlight is configured by using a plurality of LED modules and arranging a plurality of LEDs in a planar shape, the LED module and the control board regardless of the arrangement location of the anode terminal and the cathode terminal. However, the LED module is smaller than the irradiation area of the light source device, and the larger the number of LED modules to be used, the longer the wiring is routed, resulting in a mounting problem. Therefore, a larger LED module having a larger number of LEDs mounted may be used as the irradiation area is larger. However, in this case, there is a disadvantage that various LED modules must be prepared corresponding to the irradiation area of the light source device.

  The present invention has been made in view of the problem of wiring routing when a light source device is configured using a plurality of LED modules, and an object of the present invention is to provide an LED module that can configure the light source device with simple wiring. There is.

  In order to achieve the above object, in the present invention, a first main terminal and a first sub-terminal for connecting a flat insulating substrate and an external circuit formed in the vicinity of the first end of the insulating substrate A second main terminal and a second sub-terminal for connecting to an external circuit formed in the vicinity of the second end opposite to the first end of the insulating substrate; and formed on the insulating substrate. Three or more connecting wirings for serially connecting LEDs that are continuously spaced apart from each other, and a plurality of LEDs that are separately connected between the adjacent connecting wirings and connected in series in the same direction, A first passage wiring formed on the insulating substrate and electrically connecting the first sub-terminal and the second sub-terminal; and an external formed near the first end of the insulating substrate. A third subterminal for connection with a circuit, and a second passing wiring formed on the insulating substrate, The first connection wiring, which is one of the connection wirings located on one end side of the three or more connection wirings arranged in, is electrically connected to the first main terminal, and is continuously arranged. A second connection wiring which is another one of the connection wirings located on the other end side of the three or more connection wirings is electrically connected to the second main terminal, and A second passage wiring electrically connects the second main terminal or the second connection wiring and the third sub-terminal to provide an LED module.

  According to the LED module having the above characteristics, since the first passing wiring can be used as a part of the external wiring, it is possible to greatly reduce the routing of the external wiring that occurs when a plurality of LED modules are arranged. In particular, when a plurality of LED modules are arranged in a line in a direction away from the control board, and all the LEDs mounted on the plurality of LED modules are connected in series, the first LED is connected between two adjacent LED modules. A first sub-terminal disposed in the vicinity of the first end, electrically connecting the first main terminal disposed in the vicinity of the end side and the second main terminal disposed in the vicinity of the second end side And the second subterminal arranged in the vicinity of the second end side are electrically connected, and are arranged in the vicinity of the first or second end side of the farthest end of the LED module located farthest from the control board. By electrically connecting the first or second main terminal and the first or second sub-terminal, an LED module row in which all LEDs are connected in series can be configured without routing external wiring, In a light source device provided with a plurality of LED module rows Significant simplification of the external wiring can be achieved.

  In addition, by providing the third sub-terminal and the second passage wiring, the second passage wiring can be used as a part of the external wiring in addition to the first passage wiring. Therefore, the external wiring generated when a plurality of LED modules are arranged. The routing can be further reduced. In particular, as described above, when a plurality of LED modules are arranged in a line in a direction away from the control board and all the LEDs mounted on the plurality of LED modules are connected in series, they are located farthest from the control board. It is located farthest to electrically connect the first or second main terminal and the first or second subterminal disposed near the first or second end side of the far end of the LED module. Changing the first or second sub-terminal of the LED module located farthest to the third sub-terminal in the connection work between the first and second sub-terminals between the LED module and the LED module immediately before it Can be realized. Furthermore, when a plurality of LED modules are arranged in a line in a direction away from the control board and the LED strings connected in series with each LED module are connected in parallel, the routing of external wiring can be greatly reduced.

  Further, in the LED module having the above characteristics, the three or more connection wirings are formed on one surface of the insulating substrate, and the first passing wiring is formed on the other surface of the insulating substrate. It is preferable. Thereby, since the 1st passage wiring can be formed exclusively on the surface of the other side of an insulating substrate, wiring area can be expanded greatly. As a result, the heat of the insulating substrate heated by the heat generated by the LED mounted on the one surface of the insulating substrate can be radiated to the other side of the insulating substrate by the first passage wiring, and the heat dissipation performance of the LED module is improved. . Furthermore, since the line width of the first passage wiring is expanded, the impedance of the first passage wiring can be reduced.

  Furthermore, in the LED module having the above characteristics, it is preferable that a plurality of through holes whose inner wall surfaces are coated with metal are formed on the insulating substrate. As a result, the heat generated by the LED mounted on one surface of the insulating substrate can be conducted to the other side through the through-hole to radiate heat, and the heat radiation performance of the LED module is improved. Further, the first passing wiring is formed on both surfaces of the insulating substrate, the first passing wiring formed on one surface of the insulating substrate, and the other surface of the insulating substrate. It is preferable that a plurality of the first passing wirings are electrically connected through a through hole in which a plurality of inner wall surfaces formed on the insulating substrate are covered with a metal. By providing the first passage wiring on both surfaces of the insulating substrate and connecting with the through holes, the heat dissipation performance of the LED module can be further improved and the impedance of the first passage wiring can be further reduced.

  Furthermore, in the LED module having the above characteristics, it is preferable that the first passing wiring formed on the other surface of the insulating substrate includes a protrusion protruding toward the inside of the insulating substrate. Since the contact area between the first passing wiring and the insulating substrate is increased by providing the first passing wiring formed on the other surface of the insulating substrate, the mounting is performed on the one surface of the insulating substrate. The heat of the insulating substrate heated by the heat generated by the LED can be radiated more efficiently to the other side of the insulating substrate by the first passage wiring.

  Furthermore, in the present invention, a plurality of the LED modules having the above characteristics are arranged in the first direction by bringing the first end of one LED module close to the second end of the other LED module. Arranging and electrically connecting one of the main terminals arranged in the vicinity of the adjacent first edge and one of the main terminals arranged in the vicinity of the second edge One of the sub terminals arranged in the vicinity of the first end side and one of the sub terminals arranged in the vicinity of the second end side are electrically connected to form an LED module row, Provided is an LED light source device in which a plurality of the LED module rows are arranged in a second direction orthogonal to the first direction, and a plurality of the LEDs mounted on the LED module are arranged in a planar shape. .

  According to the LED light source device having the above characteristics, it is possible to provide an LED light source device having a simple wiring structure that greatly reduces the routing of external wiring between the LED module and the control board or between the LED modules.

The top view which shows typically schematic structure of 1st Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 1 in series The figure which shows the example of a connection which connects four LED modules shown in FIG. 1 in series The figure which shows the other example of a connection which connects two LED modules shown in FIG. 1 in series. The figure which shows the other example of a connection which connects four LED modules shown in FIG. 1 in series. The top view which shows typically schematic structure of 2nd Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 6 in series The figure which shows the example of a connection which connects four LED modules shown in FIG. 6 in series. The top view which shows typically schematic structure of 3rd Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 9 in series The figure which shows the example of a connection which connects four LED modules shown in FIG. 9 in series The top view which shows typically schematic structure of 4th Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 12 in series. The figure which shows the example of a connection which connects four LED modules shown in FIG. 12 in series. The top view which shows typically schematic structure of 5th Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 15 in series The figure which shows the example of a connection which connects four LED modules shown in FIG. 15 in series. The figure which shows the example of a connection connected in parallel of four LED modules shown in FIG. The top view which shows typically schematic structure of 6th Embodiment of the LED module which concerns on this invention The figure which shows the example of a connection which connects two LED modules shown in FIG. 19 in series The top view which shows typically schematic structure of the LED module which improved heat dissipation with respect to the LED module shown in FIG. Sectional drawing which shows the principal part sectional structure of the LED module which improved heat dissipation with respect to the LED module shown in FIG.19 and FIG.21. The block block diagram which shows typically schematic structure of the LED light source device which concerns on this invention Circuit diagram showing schematic configuration of control circuit drive circuit The top view which shows typically the example of 1 structure of the conventional LED module The top view which shows typically another structural example of the conventional LED module The figure which shows the example of a connection which connects eight LED modules shown in FIG. 25 in parallel The figure which shows the example of a connection which connects eight LED modules shown in FIG. 26 in parallel The figure which shows the example of a connection which connects eight LED modules shown in FIG. 25 in series-parallel. The figure which shows the example of a connection which connects eight LED modules shown in FIG. 26 in series-parallel.

  Embodiments of an LED module and an LED light source device according to the present invention will be described with reference to the drawings. In the following, for easy understanding of the description, the conventional LED module shown in FIGS. 25 and 26 and parts common to the embodiments will be described with the same reference numerals.

<First Embodiment>
FIG. 1 schematically shows a schematic configuration of a first embodiment of an LED module according to the present invention. FIG. 1A shows a printed wiring board 30 ′ before LED is mounted, and FIG. 1B shows the LED module 30 after LED 1 is mounted.

  The printed wiring board 30 ′ has nine connecting wirings 11 to 19 for connecting eight LEDs 1 in series on the insulating substrate 2, a first main terminal 3 for connecting to an external circuit, and a second main terminal. 4, four terminals of the first sub-terminal 5 and the second sub-terminal 6, and a first passage wiring 8 that electrically connects the first sub-terminal 5 and the second sub-terminal 6 are formed. . The insulating substrate 2 is made of an insulating material such as glass epoxy, and the connecting wirings 11 to 19, the four terminals 3 to 6, and the first passing wiring 8 are made of a metal film such as copper foil.

  The connection wirings 11 to 19 are spaced apart from each other and are continuously arranged with their end portions close to each other. One end of the leftmost connecting wire 11 (corresponding to the first connecting wire) is connected to the first main terminal 3, and the other end is formed with an electrode 20 for connecting to the anode of one LED. An electrode 21 for connecting to the cathode of the LED is formed at one end of each of the six connecting wires 12 to 18, and an electrode 20 for connecting to the anode of the LED is formed at each other end, One end of a connecting wire 19 (corresponding to a second connecting wire) at the right end is connected to the second main terminal 4, and an electrode 21 for connecting to the cathode of one LED is formed at the other end. The electrodes 20 and 21 are formed of the same material as the end portions of the connection wirings 11 to 19. By connecting the anode and the cathode of the LED between the electrodes 20 and 21 provided at the adjacent ends of the adjacent connecting wirings, eight LEDs 1 are connected between the first main terminal 3 and the second main terminal 4. Connect in series in the forward direction. Therefore, in this embodiment, the 1st main terminal 3 becomes an anode terminal, and the 2nd main terminal 4 becomes a cathode terminal.

  The first main terminal 3 and the second main terminal 4 are arranged separately on two opposite sides of the insulating substrate 2, and the first sub-terminal 5 and the second sub-terminal 6 are arranged on two opposite sides of the insulating substrate 2. A series of connecting wirings 11 to 19 and a first passing wiring 8 are formed so as to cross the insulating substrate 2 in the longitudinal direction.

  In the present embodiment, a surface-mount type LED is assumed as the LED 1, and the anode and the cathode of the LED 1 are electrically connected to electrodes 20 and 21 formed of a planar metal film (land) by solder reflow or the like. Is surface mounted between the electrodes 20, 21. In the case where the LED 1 is a lead type, the electrodes 20 and 21 are constituted by a metal film (land) for soldering and a through hole (through hole) into which a lead terminal formed at the center thereof is inserted.

  Next, a method of connecting the external wirings 41a to 41e when two LED modules 30 shown in FIG. 1 are connected and a total of 16 LEDs are connected in series will be described with reference to FIG.

  The external wirings 41a and 41b drive each LED of the LED module 30, and control the light emission of the anode drive terminal and the cathode drive terminal of a control board (not shown), the first main terminal 3 of one LED module 30a, and the other This is an external wiring for connecting to the second main terminal 4 of the LED module 30b. In the present embodiment, the external wiring 41a is directly connected to the first main terminal 3 of the LED module 30a, and the external wiring 41b is directly connected to the first subterminal 5 of the LED module 30a.

  The external wirings 41c and 41d are external wirings for connecting the two LED modules 30a and 30b. In the present embodiment, the external wiring 41c directly connects the second main terminal 4 of the LED module 30a and the first main terminal 3 of the LED module 30b, and the external wiring 41d is the second sub-terminal 6 of the LED module 30a and the LED module. The first sub terminals 5 of 30b are directly connected. The external wiring 41e is an external wiring for terminating the second main terminal 4 and the second subterminal 6 disposed on the edge of the LED module 30b far from the control board, and connects the two terminals. Short circuit.

  Sixteen LEDs 1 are connected in series between the first main terminal 3 of the LED module 30a and the second main terminal 4 of the LED module 30b by the external wiring 41c, and the second main terminal of the LED module 30b is connected by the external wirings 41d and 41e. The terminal 4 and the first sub-terminal 5 of the LED module 30a are electrically connected via the first passing wires 8 of the two LED modules 30a and 30b, and the external wiring 41b and the second main terminal of the LED module 30b. 4 are electrically connected. As a result, the 16 LEDs connected in series can be driven and controlled from the control board by the five short external wires 41a to 41e.

  As a connection method between the external wirings 41a to 41e and the respective terminals 3 to 6 of the LED module 30, when the external wirings 41a to 41e are conductive wires, a method of soldering the tips of the conductive wires to the surfaces of the respective terminals, the external wiring 41a When 41 to 41e are constituted by a 2-pin connector, a first 2-pin connector to be connected to the first main terminal 3 and the first sub-terminal 5 is provided on one of the two opposing sides of the insulating substrate 2, and the second main terminal 4 And a second 2-pin connector connected to the second sub-terminal 6 is provided on the other of the two opposite sides of the insulating substrate 2, and the first 2-pin connector and the second 2 are connected between the two adjacent LED modules 30. A method of connecting a pin connector is assumed.

  Comparing the configuration shown in FIG. 2 with the conventional configuration shown in FIG. 29 or FIG. 30, it can be seen that the routing of the external wiring is greatly reduced.

  Further, when three or more LED modules 30 shown in FIG. 1 are connected and the number of LEDs in series is 8n (n is an integer of 3 or more), as shown in FIG. The module 30c is inserted between the two LED modules 30a and 30b, and similarly to the configuration shown in FIG. 2, between the second main terminal 4 of the LED module 30a and the first main terminal 3 of the LED module 30c, and the LED module 30c. Between the second main terminal 4 of the LED module 30b and the first main terminal 3 of the LED module 30b via the external wiring 41c, respectively, between the second sub terminal 6 of the LED module 30a and the first sub terminal 5 of the LED module 30c, The second sub-terminal 6 of the LED module 30c and the first sub-terminal 5 of the LED module 30b are directly connected by the external wiring 41d. Further, when there are two or more LED modules 30c to be added, the second main terminal 4 of the LED module 30c and the first main terminal 3 of the adjacent LED module 30c are directly connected by the external wiring 41c, and the LED module 30c The second sub-terminal 6 and the first sub-terminal 5 of the adjacent LED module 30c are directly connected by the external wiring 41d. As shown in FIG. 3, the LED module 30 is arranged such that one end of the second main terminal 4 and the second sub terminal 6 is disposed, and the other first main terminal 3 and the first sub terminal 5 are disposed. By arranging the end sides close to each other in order and connecting them with the external wirings 41c and 41d, the number of series stages of LEDs can be easily increased. In FIG. 3, the illustration of the LED 1, the connecting wires 11 to 19, the electrodes 20 and 21, and the first passing wires 8 of each LED module 30 is omitted.

  In the present embodiment, as shown in FIGS. 2 and 3, the external wiring 41a is directly connected to the first main terminal 3 of the LED module 30a, and the external wiring 41b is directly connected to the first subterminal 5 of the LED module 30a. As shown in FIGS. 4 and 5, each of the LED modules 30 is rotated 180 degrees to directly connect the external wiring 41a to the second subterminal 6 of the LED module 30a and connect the external wiring 41b to the LED. It is good also as a structure directly connected with the 2nd main terminal 4 of the module 30a. In this case, the external wirings 41c and 41d are connected to the first main terminal 3 and the second main terminal 4 between the adjacent LED modules 30 and the first sub-terminal 5 in the same manner as in the configuration shown in FIGS. The second sub-terminals 6 are connected to each other, and the external wiring 41e differs from the configuration shown in FIGS. 2 and 3 in that the second sub-terminal 6 is disposed at the end of the LED module 30b far from the control board. The 1 main terminal 3 and the 1st subterminal 5 are connected and short-circuited.

Second Embodiment
Next, a second embodiment of the LED module according to the present invention will be described. FIG. 6 schematically shows a schematic configuration of a second embodiment of the LED module according to the present invention. 6A shows the printed wiring board 31 ′ before mounting the LED, FIG. 6B shows the LED module 31 (31a) after mounting the LED 1, and FIG. 6C shows the LED 1 The LED module 31 (31b) after mounting the shorting element 22 is shown.

  The printed wiring board 31 ′ has nine connecting wirings 11 to 19 and electrodes 20 and 21 for connecting eight LEDs 1 in series on the insulating substrate 2, a first main terminal 3 for connection to an external circuit, 4 terminals of the 2nd main terminal 4, the 1st subterminal 5, and the 2nd subterminal 6, the 1st passage wiring 8 which electrically connects between the 1st subterminal 5 and the 2nd subterminal 6, for connection An electrode 23 electrically connected to the wiring 19 (corresponding to the second connection wiring) and an electrode 24 electrically connected to the first passing wiring 8 are formed. The insulating substrate 2 is made of an insulating material such as glass epoxy, and the connection wirings 11 to 19, the four terminals 3 to 6, the first passing wiring 8, and the electrodes 20, 21, 23, and 24 are made of metal such as copper foil. Consists of a membrane.

  The printed wiring board 31 ′ of the second embodiment is different from the printed wiring board 30 ′ of the first embodiment in that electrodes 23 and 24 are newly added, except for the electrodes 23 and 24. Since these components are the same as those in the first embodiment, overlapping description is omitted.

  The electrodes 23 and 24 are electrodes for mounting the short-circuiting element 22, and are arranged close to each other as a pair, like the electrodes 20 and 21. The short-circuit element 22 is a surface-mount type two-terminal element, similar to the LED 1, and the resistance of the chip-type resistance element is replaced with a conductor so that the resistance value is substantially 0Ω. It may be replaced. The shorting element 22 is electrically connected to the electrodes 23 and 24 by solder reflow or the like in parallel with the mounting of the LED 1 on the electrodes 20 and 21 to form the LED module 31b. In the second embodiment, two types of LED modules 31 are manufactured using the same printed wiring board 31 ′, the LED module 31 b on which the short-circuit element 22 is mounted and the LED module 31 a that is not mounted.

  Next, a method of connecting the external wirings 41a to 41d when the LED modules 31a and 31b shown in FIG. 6 are connected one by one and a total of 16 LEDs are connected in series will be described with reference to FIG.

  As for the external wirings 41a to 41d, as in the first embodiment, the external wiring 41a is directly connected to the first main terminal 3 of the LED module 31a, and the external wiring 41b is directly connected to the first subterminal 5 of the LED module 31a. The external wiring 41c directly connects the second main terminal 4 of the LED module 31a and the first main terminal 3 of the LED module 31b, and the external wiring 41d connects the second sub-terminal 6 of the LED module 31a and the LED module 31b. The 1 sub-terminal 5 is directly connected. The difference from the first embodiment is that in the first embodiment, the external wiring 41e is connected between the second main terminal 4 and the second sub-terminal 6 arranged on the edge of the LED module 30b far from the control board. In the second embodiment, the second main terminal 4 and the second sub-terminal 6 disposed on the edge of the LED module 31b far from the control board are externally connected. The second main terminal 4 that is electrically connected to the electrode 23 via the connecting wire 19 and the first passing wire 8 are connected by short-circuiting the electrodes 23 and 24 with the short-circuit element 22 instead of the wire. The second sub-terminal 6 that is electrically connected to the electrode 24 via the short circuit is short-circuited. As a result, the short-circuit process can be performed at the same time when the LED 1 is mounted on the printed circuit board 31 ′. Therefore, the connection process of the external wiring 41 e can be omitted, and the connection process of the external wirings 41 a to 41 d can be simplified.

  Sixteen LEDs 1 are connected in series between the first main terminal 3 of the LED module 31a and the second main terminal 4 of the LED module 31b by the external wiring 41c, and the LED module 31b is connected by the external wiring 41d and the short-circuiting element 22. The second main terminal 4 and the first sub-terminal 5 of the LED module 31a are electrically connected via the first passing wirings 8 of the two LED modules 31a and 31b, and the external wiring 41b and the first of the LED module 31b are connected to each other. Two main terminals 4 are electrically connected. As a result, the 16 LEDs connected in series can be driven and controlled from the control board by the four short external wirings 41 a to 41 d and the short-circuit element 22.

  The difference between the second embodiment and the first embodiment is that the short-circuiting process between the second main terminal 4 and the second sub-terminal 6 arranged on the end side of the LED module 31b (30b) far from the control board. Since only the way is different, it can be seen that the routing of the external wiring is greatly reduced as compared with the conventional configuration shown in FIG. 29 or FIG. 30 as in the first embodiment. Further, when three or more LED modules 31 shown in FIG. 6 are connected and the number of LEDs in series is 8n (n is an integer of 3 or more), as shown in FIG. The module 31c is inserted between the two LED modules 31a and 31b, and similarly to the configuration shown in FIG. 7, the LED module 31c is connected between the second main terminal 4 of the LED module 31a and the first main terminal 3 of the LED module 31c. Between the second main terminal 4 of the LED module 31b and the first main terminal 3 of the LED module 31b via the external wiring 41c, respectively, between the second sub terminal 6 of the LED module 31a and the first sub terminal 5 of the LED module 31c, The second sub-terminal 6 of the LED module 31c and the first sub-terminal 5 of the LED module 31b are directly connected by the external wiring 41d. Further, when there are two or more LED modules 31c to be added, the second main terminal 4 of the LED module 31c and the first main terminal 3 of the adjacent LED module 31c are directly connected by the external wiring 41c, and the second LED module 31c of the LED module 31c is connected. The second sub-terminal 6 and the first sub-terminal 5 of the adjacent LED module 31c are directly connected by the external wiring 41d. As shown in FIG. 8, the LED module 31 is connected to one end where the second main terminal 4 and the second subterminal 6 are arranged, and the other side where the first main terminal 3 and the first subterminal 5 are arranged. By arranging the end sides close to each other in order and connecting them with the external wirings 41c and 41d, the number of series stages of LEDs can be easily increased. However, the third LED module 31c inserted between the two LED modules 31a and 31b is the LED module 31 on which the short-circuit element 22 is not mounted, like the LED module 31a. In FIG. 8, illustration of the LED 1 of each LED module 31, the connecting wires 11 to 19, the electrodes 20 and 21, the first passing wire 8, the short-circuit element 22, and the electrodes 23 and 24 is omitted.

<Third Embodiment>
Next, a third embodiment of the LED module according to the present invention will be described. FIG. 9 schematically shows a schematic configuration of a third embodiment of the LED module according to the present invention. In the second embodiment, as shown in FIG. 6, the electrode 23 is provided so as to be electrically connected to the connecting wire 19 (corresponding to the second connecting wire) and is electrically connected to the first passing wire 8. Although formed so as to be close to the electrode 24, in the third embodiment, as shown in FIG. 9, the electrode 23 is provided so as to be electrically connected to the connecting wiring 11 (corresponding to the first connecting wiring). 9A shows a printed wiring board 32 ′ before mounting the LED, FIG. 9B shows the LED module 32 (32a) after mounting the LED1, and FIG. 9C shows the LED1. The LED module 32 (32b) after mounting the shorting element 22 is shown.

  The printed wiring board 32 ′ of the third embodiment is different from the printed wiring board 31 ′ of the second embodiment only in the electrical connection destination of the electrode 23. Since it is the same as 1st and 2nd embodiment, the overlapping description is omitted.

  Next, a method of connecting the external wirings 41a to 41d when the LED modules 32a and 32b shown in FIG. 9 are connected one by one and a total of 16 LEDs are connected in series will be described with reference to FIG. Unlike the second embodiment, the connection method of the external wirings 41a to 41d is similar to the connection method shown in FIG. 4 of the first embodiment. The external wiring 41a is directly connected to the second subterminal 6 of the LED module 32a, and the external wiring 41b is directly connected to the second main terminal 4 of the LED module 32a. The external wiring 41c directly connects the first main terminal 3 of the LED module 32a and the second main terminal 4 of the LED module 32b, and the external wiring 41d is the first subterminal 5 of the LED module 32a and the second subterminal of the LED module 32b. The terminals 6 are directly connected.

  The difference from the connection method of FIG. 4 of the first embodiment is that in FIG. 4 of the first embodiment, the first main terminal 3 and the first main terminal 3 arranged on the end side of the LED module 30b far from the control board are different. While the sub terminals 5 are short-circuited by being connected by the external wiring 41e, in the third embodiment, the first main terminal 3 disposed on the end side of the LED module 32b far from the control board and The first main terminal 5 is electrically connected to the electrode 23 via the connection wiring 11 by connecting the electrodes 23 and 24 with the short-circuiting element 22 instead of the external wiring instead of the external wiring. The terminal 3 is short-circuited between the first sub-terminal 5 that is electrically connected to the electrode 24 via the first passage wiring 8. As a result, the short-circuit process can be performed at the same time when the LED 1 is mounted on the printed wiring board 32 ′. Therefore, the connection process of the external wiring 41 e can be omitted, and the connection process of the external wirings 41 a to 41 d can be simplified.

  By the external wiring 41c, 16 LEDs 1 are connected in series in the opposite direction to the second embodiment between the second main terminal 4 of the LED module 32a and the first main terminal 3 of the LED module 32b, and short-circuited with the external wiring 41d. The element 22 is electrically connected between the first main terminal 3 of the LED module 32b and the second sub-terminal 6 of the LED module 32a via the first passing wires 8 of the two LED modules 32a and 32b. The external wiring 41a and the first main terminal 3 of the LED module 32b are electrically connected. As a result, the 16 LEDs connected in series can be driven and controlled from the control board by the four short external wirings 41 a to 41 d and the short-circuit element 22.

  The difference between the third embodiment and the first embodiment shown in FIG. 4 is that the first main terminal 3 and the first sub-terminal that are arranged on the end side of the LED module 32b (30b) far from the control board. Since only the method of short-circuiting between the five is different, it can be seen that the routing of the external wiring is significantly reduced as compared with the conventional configuration shown in FIG. 29 or 30 as in the first embodiment. . Further, when three or more LED modules 32 shown in FIG. 9 are connected and the number of LEDs in series is 8n (n is an integer of 3 or more), as shown in FIG. The module 32c is inserted between the two LED modules 32a and 32b, and similarly to the configuration shown in FIG. 10, between the first main terminal 3 of the LED module 32a and the second main terminal 4 of the LED module 32c, and the LED module 31c. The first main terminal 3 and the second main terminal 4 of the LED module 32b are directly connected by the external wiring 41c, respectively, and between the first sub terminal 5 of the LED module 32a and the second sub terminal 6 of the LED module 32c, The first sub-terminal 5 of the LED module 32c and the second sub-terminal 6 of the LED module 32b are directly connected by the external wiring 41d. Further, when there are two or more LED modules 32c to be added, the first main terminal 3 of the LED module 32c and the second main terminal 4 of the LED module 32c adjacent to each other are directly connected by the external wiring 41c, and the second LED module 32c of the LED module 32c is connected. The first sub-terminal 5 and the second sub-terminal 6 of the LED module 32c adjacent to each other are directly connected by the external wiring 41d. As shown in FIG. 11, the LED module 32 is connected to one end where the first main terminal 3 and the first subterminal 5 are arranged, and the other end where the second main terminal 4 and the second subterminal 6 are arranged. By arranging the end sides close to each other in order and connecting them with the external wirings 41c and 41d, the number of series stages of LEDs can be easily increased. However, the third LED module 32c inserted between the two LED modules 32a and 32b is the LED module 32 in which the short-circuit element 22 is not mounted, like the LED module 32a. In FIG. 11, the illustration of the LED 1, the connecting wires 11 to 19, the electrodes 20 and 21, the first passing wires 8, the shorting element 22, and the electrodes 20 and 21 of each LED module 30 is omitted.

<Fourth embodiment>
Next, a fourth embodiment of the LED module according to the present invention will be described. FIG. 12 schematically shows a schematic configuration of the fourth embodiment of the LED module according to the present invention. FIG. 12A shows a printed wiring board 33 ′ before LED is mounted, and FIG. 12B shows the LED module 33 after LED1 is mounted.

  The printed wiring board 33 ′ has nine connecting wirings 11 to 19 and electrodes 20 and 21 for connecting the eight LEDs 1 in series on the insulating substrate 2, the first main terminal 3 for connecting to an external circuit, The first main terminal 4, the first sub terminal 5, the second sub terminal 6, and the third sub terminal 7 are electrically connected between the first sub terminal 5 and the second sub terminal 6. A second passage wiring 9 that electrically connects between the passage wiring 8, the third sub-terminal 7 and the connection wiring 19 (corresponding to the second connection wiring) is formed. In the fourth embodiment, the third sub terminal 7 is disposed in the vicinity of the end side on the same side as the first main terminal 3 and the first sub terminal 5. That is, the second passage wiring 9 is formed so as to cross the insulating substrate 2 in the longitudinal direction, like the first passage wiring 8. The insulating substrate 2 is made of an insulating material such as glass epoxy, and the connecting wirings 11 to 19, the five terminals 3 to 7, the first passing wiring 8, the second passing wiring 9, and the electrodes 20 and 21 are made of copper foil or the like. It is composed of a metal film.

  The printed wiring board 33 ′ of the fourth embodiment is different from the printed wiring board 30 ′ of the first embodiment in that a third sub terminal 7 and a second passing wiring 9 are newly added. The constituent elements other than the third sub-terminal 7 and the second passing wiring 9 are the same as those in the first embodiment, and therefore, a duplicate description is omitted. The second passage wiring 9 corresponds to the short-circuit element 22 in the LED module 31b of the second embodiment in which the short-circuit element 22 is mounted, and the first sub-terminal 5 and the third sub-terminal 7 are used interchangeably. Thus, the same effect as the case where the connection wiring 19 and the first passing wiring 8 are short-circuited by the short-circuiting element 22, or in the first embodiment, disposed on the edge of the LED module 30 b far from the control board. The same effect can be obtained as when the second main terminal 4 and the second sub terminal 6 are short-circuited by the external wiring 41e.

  Next, a method of connecting the external wirings 41a to 41d when the two LED modules 33 shown in FIG. 12 are connected and a total of 16 LEDs are connected in series will be described with reference to FIG.

  As in the first and second embodiments, the external wiring 41a is directly connected to the first main terminal 3 of the LED module 33a, the external wiring 41b is directly connected to the first subterminal 5 of the LED module 33a, and the external wiring 41c. Directly connects the second main terminal 4 of the LED module 34a and the first main terminal 3 of the LED module 33b. Unlike the first and second embodiments, the external wiring 41d directly connects the second subterminal 6 of the LED module 33a and the third subterminal 7 of the LED module 33b. The difference from the first and second embodiments is that, in the first and second embodiments, the external wiring 41d is between the second subterminal 6 of the LED modules 30a and 31a and the first subterminal 5 of the LED modules 30b and 31b. Are directly connected, and the second main terminal 4 and the second sub-terminal 6 arranged on the end sides of the LED modules 30b and 31b far from the control board are short-circuited by the external wiring 41e or the short-circuit element 22. On the other hand, in the fourth embodiment, the external wiring 41d directly connects the second subterminal 6 of the LED module 33a and the third subterminal 7 of the LED module 33b, and connects the LED module 33b far from the control board. The short circuit process between the 2nd main terminal 4 and the 2nd subterminal 6 which are arrange | positioned at an edge is not performed. As a result, the short-circuit process by the external wiring 41e or the short-circuit element 22 in the first and second embodiments can be omitted, and the connection process of the external wirings 41a to 41d can be simplified.

  Sixteen LEDs 1 are connected in series between the first main terminal 3 of the LED module 33a and the second main terminal 4 of the LED module 33b by the external wiring 41c, and the second main terminal 4 of the LED module 33b by the external wiring 41d. And the first sub-terminal 5 of the LED module 33a are electrically connected via the first passage wiring 8 of the LED module 33a and the second passage wiring 9 of the LED module 33b. Two main terminals 4 are electrically connected. As a result, the 16 LEDs connected in series can be driven and controlled from the control board by the four short external wires 41a to 41d.

  The difference between the fourth embodiment and the first embodiment is that the LED module 33a connected to the second main terminal 4 disposed on the end side of the LED module 33b (30b) far from the control board and the external wiring 41b. Since only the way of electrically connecting the first sub-terminals 5 of (30a) is different, as in the first embodiment, the external wiring is routed as compared with the conventional configuration shown in FIG. 29 or FIG. It can be seen that is significantly reduced. Furthermore, when three or more LED modules 33 shown in FIG. 12 are connected and the number of LEDs connected in series is 8n (n is an integer of 3 or more), as shown in FIG. The module 33c is inserted between the two LED modules 33a and 33b, and similarly to the configuration shown in FIG. 13, between the second main terminal 4 of the LED module 33a and the first main terminal 3 of the LED module 33c, and the LED module 33c. Between the second main terminal 4 of the LED module 33b and the first main terminal 3 of the LED module 33b via the external wiring 41c, respectively, between the second sub terminal 6 of the LED module 33a and the first sub terminal 5 of the LED module 33c, The second sub-terminal 6 of the LED module 33c and the third sub-terminal 7 of the LED module 33b are directly connected by the external wiring 41d. Further, when there are two or more LED modules 33c to be added, the second main terminal 4 of the LED module 33c and the first main terminal 3 of the adjacent LED module 33c are directly connected by the external wiring 41c. The second sub-terminal 6 and the first sub-terminal 5 of the LED module 33c adjacent to each other are directly connected by the external wiring 41d. As shown in FIG. 14, the LED module 33 is connected to one end where the second main terminal 4 and the second subterminal 6 are arranged, the first main terminal 3, the first subterminal 5, and the third subterminal 7. By arranging the other end sides arranged with each other in order and connecting them with the external wirings 41c and 41d, it is possible to easily increase the number of LEDs in series. In FIG. 14, the LED 1, the connecting wires 11 to 19, the electrodes 20 and 21, the first passing wire 8, and the second passing wire 9 of each LED module 33 are omitted.

<Fifth Embodiment>
Next, a fifth embodiment of the LED module according to the present invention will be described. FIG. 15 schematically shows a schematic configuration of the fifth embodiment of the LED module according to the present invention. In the fourth embodiment, as shown in FIG. 12, the third subterminal 7 is arranged in the vicinity of the end on the same side as the first main terminal 3 and the first subterminal 5, and the second passage wiring 9 In the fifth embodiment, the third sub-terminal 7 is connected to the second main terminal 4 and the second main terminal 4 as shown in FIG. 15. Arranged in the vicinity of the edge on the same side as the sub-terminal 6, the second passage wiring 9 is formed so as to electrically connect the third sub-terminal 7 and the connection wiring 11 (corresponding to the first connection wiring). . FIG. 15A shows a printed wiring board 34 ′ before the LED is mounted, and FIG. 15B shows the LED module 34 after the LED 1 is mounted.

  The printed wiring board 34 ′ of the fifth embodiment is different from the printed wiring board 33 ′ of the fourth embodiment only in the location of the third sub-terminal 7 and the electrical connection destination, and the LED module 34. Since each component is the same as in the first and fourth embodiments, a duplicate description is omitted.

  Next, a method of connecting the external wirings 41a to 41d when the two LED modules 34 shown in FIG. 15 are connected and a total of 16 LEDs are connected in series will be described with reference to FIG. Unlike the fourth embodiment, the connection method of the external wirings 41a to 41d is similar to the connection method shown in FIG. 4 of the first embodiment. The external wiring 41a is directly connected to the second subterminal 6 of the LED module 34a, and the external wiring 41b is directly connected to the second main terminal 4 of the LED module 34a. The external wiring 41c directly connects the first main terminal 3 of the LED module 34a and the second main terminal 4 of the LED module 34b, and the external wiring 41d is the first subterminal 5 of the LED module 34a and the third subterminal of the LED module 34b. The terminals 7 are directly connected.

  The connection method of FIG. 4 of the first embodiment and the third embodiment are different from the connection method of the first embodiment in FIGS. 4 and 3 at the end of the LED module 30b far from the control board. Whereas the first main terminal 3 and the first sub-terminal 5 are short-circuited by the external wiring 41e or the short-circuiting element 22, in the fifth embodiment, the external wiring 41d is the first sub-terminal of the LED module 34a. The terminal 5 and the third subterminal 7 of the LED module 34b are directly connected, and the short circuit between the first main terminal 3 and the first subterminal 5 disposed on the edge of the LED module 34b far from the control board. Do not do. As a result, the short-circuit process by the external wiring 41e or the short-circuit element 22 in FIG. 4 and the third embodiment of the first embodiment can be omitted, and the connection process of the external wirings 41a to 41d can be simplified.

  Between the first main terminal 3 of the LED module 34a and the second main terminal 4 of the LED module 34b by the external wiring 41c, 16 LEDs 1 are connected in series in the opposite direction to the fourth embodiment, and the external wiring 41d The first main terminal 3 of the LED module 34b and the second subterminal 6 of the LED module 34a are electrically connected via the first passage wiring 8 of the LED module 34a and the second passage wiring 9 of the LED module 34b. The external wiring 41a and the first main terminal 3 of the LED module 34b are electrically connected. As a result, the 16 LEDs connected in series can be driven and controlled from the control board by the four short external wires 41a to 41d.

  The difference between the fifth embodiment and the first embodiment shown in FIG. 4 is that the first main terminal 3 disposed on the edge of the LED module 34b (30b) far from the control board and the external wiring 41a. 29 is different from the second sub-terminal 6 of the LED module 33a (30a) to be connected to the second sub-terminal 6 in the same manner as the configuration shown in FIG. 4 of the first embodiment. Compared with the conventional configuration shown, it can be seen that the routing of the external wiring is greatly reduced. Further, when three or more LED modules 34 shown in FIG. 15 are connected and the number of LEDs in series is 8n (n is an integer of 3 or more), as shown in FIG. The module 34c is inserted between the two LED modules 34a and 34b, and similarly to the configuration shown in FIG. 16, between the first main terminal 3 of the LED module 34a and the second main terminal 4 of the LED module 34c, and the LED module 34c. Between the first main terminal 3 of the LED module 34 and the second main terminal 4 of the LED module 34b via the external wiring 41c, respectively, between the first sub-terminal 5 of the LED module 34a and the second sub-terminal 6 of the LED module 34c, The first sub-terminal 5 of the LED module 34c and the third sub-terminal 7 of the LED module 34b are directly connected by the external wiring 41d. Further, when there are two or more LED modules 34c to be added, the first main terminal 3 of the LED module 34c and the second main terminal 4 of the adjacent LED module 34c are directly connected by the external wiring 41c, and the LED module 34c The first sub-terminal 5 and the second sub-terminal 6 of the adjacent LED module 34c are directly connected by the external wiring 41d. As shown in FIG. 17, the LED module 34 is connected to one end where the first main terminal 3 and the first subterminal 5 are disposed, the second main terminal 4, the second subterminal 6, and the third subterminal 7. By arranging the other end sides arranged with each other in order and connecting them with the external wirings 41c and 41d, it is possible to easily increase the number of LEDs in series. In FIG. 17, illustration of the LED 1, the connecting wires 11 to 19, the electrodes 20 and 21, the first passing wire 8 and the second passing wire 9 of each LED module 34 is omitted.

  Next, referring to FIG. 18, a method for connecting the external wirings 41a to 41e when using a plurality of LED modules 34 according to the fifth embodiment and connecting eight LEDs 1 connected in series with each LED module 34 in parallel with each other will be described. To explain. In the example shown in FIG. 18, four LED modules 34 are connected in parallel. 17 differs from the configuration shown in FIG. 17 in that each LED module 34 is rotated by 180 degrees, and further differs in that the external wiring 41e is used as in the first embodiment. The external wiring 41a is directly connected to the first main terminal 3 of the LED module 34a, and the external wiring 41b is directly connected to the first subterminal 5 of the LED module 34a. The external wiring 41c is connected between the third sub terminal 7 of the LED module 34a and the first main terminal 3 of the LED module 34c, between the third sub terminal 7 of the LED module 34c and the first main terminal 3 of the LED module 34c, The third subterminal 7 and the first main terminal 3 of the LED module 34b are directly connected to each other, and the external wiring 41d is connected between the second subterminal 6 of the LED module 34a and the first subterminal 5 of the LED module 34c, and the LED module 34c. The second sub-terminal 6 and the first sub-terminal 5 of the LED module 34c are directly connected to each other, and the second sub-terminal 6 of the LED module 34c and the first sub-terminal 5 of the LED module 34b are directly connected. The external wiring 41e directly connects the second main terminals 4 and the second sub terminals 6 of the four LED modules 34a, 34b, and 34c.

  Comparing the configuration shown in FIG. 18 with the conventional configuration shown in FIG. 27 or FIG. 28, it can be seen that the routing of the external wiring is greatly reduced. Even when a plurality of LED modules 33 according to the fourth embodiment are used, the same parallel connection is possible.

<Sixth Embodiment>
Next, a sixth embodiment of the LED module according to the present invention will be described. In each of the above embodiments, the case where the nine connecting wires 11 to 19 and the first passing wires 8 are formed on the same surface of the insulating substrate 2 has been described. However, the connecting wires 11 to 19 are formed on the insulating substrate 2. It is also preferable to form on one surface (for example, on the front surface) and to form the first passing wiring 8 on the other surface (for example, on the back surface).

  FIG. 19 schematically shows a schematic configuration of a sixth embodiment of the LED module according to the present invention as another embodiment of the LED module 31 of the second embodiment. FIG. 19A shows the first surface of the printed wiring board 35 ′ on which the connection wirings 11 to 19 are formed before mounting the LED, and FIG. 19B shows the first surface of the LED module 35. FIG. 19C shows the first surface of the LED module 35 (35a) after the LED 1 is mounted, and FIG. 19D shows a short circuit with the LED 1. FIG. The 1st surface of LED module 35 (35b) after mounting the element 22 for operation is shown.

  The printed wiring board 35 ′ has nine connecting wirings 11 to 19 for connecting the eight LEDs 1 in series on the first surface of the insulating substrate 2, the electrodes 20 and 21, and a first for connecting to an external circuit. The main terminal 3 and the second main terminal 4, and the electrode 23 and the electrode 24 are formed, and on the second surface of the insulating substrate 2, the first sub-terminal 5 and the second sub-terminal 6 for connecting to an external circuit, and A first passing wiring 8 is formed to electrically connect the first subterminal 5 and the second subterminal 6, and further penetrates between the first surface and the second surface of the insulating substrate 2, and the inner wall surface is made of metal. A through hole (through hole) covered with metal by plating or the like, and is formed by forming a first through hole 25 electrically connected to the electrode 24 and the first passing wiring 8. The insulating substrate 2 is made of an insulating material such as glass epoxy, and the connection wirings 11 to 19, the four terminals 3 to 6, the first passing wiring 8, and the electrodes 20, 21, 23, and 24 are made of metal such as copper foil. Consists of a membrane.

  The printed wiring board 35 ′ of the sixth embodiment is different from the printed wiring board 31 ′ of the second embodiment in that the first subterminal 5, the second subterminal 6, and the first passing wiring 8 are connected to the first main terminal 3. And the point that the second main terminal 4 and the connecting wires 11 to 19 are formed on the second surface opposite to the first surface are different from the point that the first through hole 25 is newly added. Since the constituent elements other than the first through-hole 25 are the same as those in the first embodiment, the overlapping description is omitted.

  In the sixth embodiment, since the first passage wiring 8 and the connection wirings 11 to 19 are formed separately on the first surface and the second surface of the insulating substrate 2, the exclusive area of the first passage wiring 8 and The line width can be made larger than in the second embodiment, the heat dissipation of the LED module 35 can be improved, and the impedance of the first passage wiring 8 can be reduced. Regarding heat dissipation, since the LED 1 is mounted on the first surface side of the insulating substrate 2, the heat of the insulating substrate 2 heated from the first surface side is higher in thermal conductivity than the insulating substrate 2 from the second surface side. Heat can be radiated through the first passage wiring 8.

  Since the LED module 35 of the sixth embodiment is electrically equivalent to the LED module 31 of the second embodiment, the LED module 35 is connected, and the number of series stages of the LEDs 1 mounted on the LED module 35 is multiplied by the number of modules. The connection method of the external wirings 41a to 41d in the case of increasing the number of the external wirings 41a to 41d is basically the same as that of the second embodiment, but the connection of the external wirings 41a and 41c is performed on the first surface side of the insulating substrate 2, It is necessary to connect the external wirings 41b and 41d on the second surface side of the insulating substrate 2. FIG. 20 shows a method of connecting the external wirings 41a to 41d when the LED modules 35a and 35b are connected one by one and a total of 16 LEDs are connected in series. However, since the electrical connection method of the external wirings 41a to 41d is the same as that of the second embodiment as described above, the overlapping description is omitted.

  In order to further improve the heat dissipation with respect to the LED module 35 shown in FIG. 19, the first passing wiring 8 is formed on both the first surface and the second surface of the insulating substrate 2 as shown in FIG. 21. It is also preferable to use the LED module 36 in which the first passage wiring 8 on each surface is electrically connected through a number of second through holes 26. The second through hole 26 is formed in the same manner as the first through hole 25. FIG. 21A shows the first surface of the LED module 36 (printed wiring board 36 ′) before mounting the LED, and FIG. 21B shows the second surface of the LED module 36. The LED module 36 shown in FIG. 21 includes a large number of second through holes 26, so that heat generated by the LEDs 1 mounted on the first surface side of the insulating substrate 2 can be generated from the first surface side through the second through holes 26. It becomes possible to conduct heat to the first passage wiring 8 on the second surface side and efficiently radiate heat from the first passage wiring 8, and the heat dissipation is further improved as compared with the LED module 35 shown in FIG.

  Further, in order to further improve the heat dissipation performance with respect to the LED modules 35 and 36 shown in FIGS. 19 and 21, they are formed on the second surface side of the insulating substrate 2 as schematically shown in the sectional view of FIG. Protruding portions 27 that protrude toward the inside of the insulating substrate 2 (that is, toward the first surface side) with respect to the first passing wiring 8 to be formed are distributed over the entire surface of the first passing wiring 8. It is also preferable. The cross-sectional shape of the protrusion 27 is a comb shape, and the planar shape may be any shape such as a stripe shape, a lattice shape, a linear shape, or a cross shape arranged in a matrix. By providing the protrusion 27, the contact area between the insulating substrate 2 and the first passage wiring 8 is increased, and the heat dissipation is further improved.

  In the LED modules 35 and 36 shown in FIGS. 19 and 21, not only the first passing wiring 8 but also the first subterminal 5 and the second subterminal 6 are formed on the second surface of the insulating substrate 2. The sub-terminal 5 and the second sub-terminal 6 are formed on the first surface side of the insulating substrate 2 as in the first to fifth embodiments, and the first sub-terminal 5 and the second sub-terminal 6 on the first surface side are formed. In addition, the first through wiring 8 on the second surface side may be electrically connected by the through hole.

  In addition, since the heat radiation effect by many 2nd through-holes 26 shown in FIG. 21 can be show | played by the 2nd through-holes 26 alone, in the structure shown in FIG. 19, it electrically connects with the 1st passage wiring 8 of the 2nd surface side. It is also preferable to form many second through holes 26 to be connected. However, the second through hole 26 needs to be formed at a position where it does not contact the connecting wires 11 to 19 on the first surface side, the first main terminal 3 and the second main terminal 4, the electrode 23 and the electrode 24, and the like. Furthermore, also in the first to fifth embodiments, it is preferable to provide a large number of second through holes 26 in the empty region on the surface of the insulating substrate 2.

<Seventh embodiment>
Next, as a seventh embodiment of the present invention, an LED light source device in which the LED modules 30 to 36 of the above-described embodiments are arranged in a matrix and LEDs are distributed and arranged in a plane will be described with reference to FIG. . Although FIG. 23 illustrates a case where the LED module 31 (31a, 31b) of the second embodiment is used as the LED module, the LED module to be used is not limited to the second embodiment.

  In the example shown in FIG. 23, the LED light source device includes LED modules 31 a and 31 b having the configuration shown in FIG. 6 connected one by one, and a total of 16 LEDs connected in series. 12 planes arranged in a direction orthogonal to the direction have two planes on the left and right. The LED module set of the LED modules 31a and 31b is rotated 180 degrees between the left and right planes.

  According to the configuration shown in FIG. 23, the number of the LED modules 31 arranged in the longitudinal direction of the LED module 31 is 4, but the control board 42 is divided into two left and right planes and performs LED driving and light emission control, respectively. Since the number of series stages of LEDs driven by the control board 42 is 16, it is possible to suppress the drive voltage of the LED strings connected in series from being increased.

  FIG. 24 shows a schematic configuration of a drive circuit that drives the LED rows connected in series in each LED module set of the control board 42 and controls the light emission thereof. As shown in FIG. 24, the first power source VH on the high voltage side for supplying a high voltage for conducting the LED row 37 and the first power source VH on the low voltage side between the anode terminal 37A and the cathode terminal 37C of the LED row 37. The LED string 37 and the current limiting element 38 are connected in series between the two power sources VL. There are two types, the case where the current limiting element 38 is arranged on the first power supply VH side and the case where it is arranged on the second power supply VL side. The amount of current flowing through the current limiting element 38 is adjusted so that the voltage applied to each LED in the LED array 37 does not exceed the rating. Although the light emission luminance of the LED changes depending on the current flowing through the LED array 37, the light emission luminance can be adjusted by adjusting the current flowing through the LED array 37 by PWM (pulse width modulation) control. In this case, a switching element (not shown) for performing PWM control is provided for each LED array 37 or for the entire control board 42, and PWM control is performed for each LED array 37 or for the entire control board 42.

  Next, another embodiment of the device of the present invention will be described.

  <1> In each of the above embodiments, the case where eight LEDs are connected in series to one LED module has been described as an example, but the number of LEDs in series in one LED module is not limited to eight. Absent. Further, the arrangement and shape of the connecting wirings 11 to 19 on the insulating substrate 2 are not limited to those exemplified in the above embodiments.

  <2> In each of the above embodiments, the first main terminal 3 is provided on the anode side of the LED array to serve as the anode terminal of the LED module, and the second main terminal 4 is provided on the cathode side of the LED array to provide the cathode terminal of the LED module. However, the first main terminal 3 may be a cathode terminal and the second main terminal 4 may be an anode terminal.

  <3> In each of the above embodiments, the first main terminal 3, the second main terminal 4, the first sub-terminal 5, the second sub-terminal 6, and the third sub-terminal 7 are insulated by a metal film such as copper foil. Although the case where it formed on the surface of the board | substrate 2 was illustrated, for example, in 1st-3rd embodiment, the 1st 2 pin connector components are mounted | worn with the edge part of one side of the 2 sides which the insulated substrate 2 opposes. Then, the respective pins are assigned to the first main terminal 3 and the first sub-terminal 5, and the second 2-pin connector part is mounted on the other edge portion of the two opposite sides of the insulating substrate 2, Pins are assigned to the second main terminal 4 and the second sub-terminal 6 so that one of the first 2-pin connector part and the second 2-pin connector part is constituted by a male pin and the other is constituted by a female pin. Also good. In this case, the external wirings 41a to 41d are connected by fitting and connecting two 2-pin connector parts, and the external wirings 41a to 41d are not necessary. If the 2-pin connector part is considered as an external wiring, the external wiring is already mounted on the LED module.

  <4> In each of the above-described embodiments, a case where one set of the connection wires 11 to 19, the first main terminal, and the third second main terminal 4 is described in one LED module is described. Two or more sets of the first main terminal and the third second main terminal 4 may be used, and the first sub-terminal 5, the second sub-terminal 6, and the first passing wiring 8 may be shared by the two or more sets.

  <5> In each of the above embodiments, it is assumed that only the LED module of each of the above embodiments is used, but an LED light source device in which a plurality of LED modules are arranged is configured by appropriately combining the LED modules of each of the above embodiments. You may do it.

  The LED module according to the present invention can be used for an LED module in which a plurality of LEDs are connected in series, and an LED light source device including the LED module.

1: LED
2: Insulating substrate 3: First main terminal (anode terminal)
4: Second main terminal (cathode terminal)
5: 1st subterminal 6: 2nd subterminal 7: 3rd subterminal 8: 1st passage wiring 9: 2nd passage wiring 11-19: Connection wiring 20, 21: Electrode for LED connection 22: For short circuit 2 terminal elements 23, 24: electrode for connecting two terminal elements for short circuit 25: first through hole 26: second through hole 27: protrusion 30 to 36: LED module 30 'to 36': printed wiring board 37 : LED string 37A: Anode terminal 37C: Cathode terminal 38: Current limiting elements 41a to 41e: External wiring 42: Control board 50, 51: Conventional LED module 52: External wiring VH: First power supply VL: Second power supply

Claims (6)

A flat insulating substrate;
A first main terminal and a first sub-terminal for connection to an external circuit formed in the vicinity of the first edge of the insulating substrate;
A second main terminal and a second sub-terminal for connection to an external circuit formed in the vicinity of a second end opposite to the first end of the insulating substrate;
Three or more connecting wirings for connecting in series the LEDs formed on the insulating substrate and continuously arranged apart from each other;
A plurality of LEDs connected in series between the adjacent connecting wires and connected in series in the same direction;
An external circuit formed on the insulating substrate and formed in the vicinity of the first edge of the insulating substrate, and a first passing wiring that electrically connects the first sub terminal and the second sub terminal. A third subterminal for connection to
A second passage wiring formed on the insulating substrate,
A first connection wiring that is one of the connection wirings located on one end side of the three or more connection wirings arranged continuously is electrically connected to the first main terminal;
A second connection wiring which is another one of the connection wirings located on the other end side of the three or more connection wirings arranged continuously is electrically connected to the second main terminal. And
The LED module, wherein the second passage wiring electrically connects the second main terminal or the second connection wiring and the third sub-terminal. The three or more connecting wires are formed on one surface of the insulating substrate;
2. The LED module according to claim 1, wherein the first passing wiring is formed on a surface on the other side of the insulating substrate. The first passing wiring is formed on both surfaces of the insulating substrate;
An inner wall surface in which a plurality of the first passing wires formed on one surface of the insulating substrate and a plurality of the first passing wires formed on the other surface of the insulating substrate are formed on the insulating substrate. Are electrically connected through a metal-coated through-hole.   4. The LED according to claim 2, wherein the first passing wiring formed on the other surface of the insulating substrate includes a protrusion protruding toward the inside of the insulating substrate. 5. module.   The LED module according to claim 1, wherein a plurality of through holes whose inner wall surfaces are covered with metal are formed in the insulating substrate. The LED module according to any one of claims 1 to 5, wherein the first end of one LED module and the second end of another LED module are placed close to each other. One of the main terminals arranged in the vicinity of the adjacent first end side and one of the main terminals arranged in the vicinity of the second end side are arrayed in one direction and electrically connected to each other Then, one of the sub terminals disposed in the vicinity of the adjacent first end side and one of the sub terminals disposed in the vicinity of the second end side are electrically connected to each other to form an LED module row. Configure
A plurality of the LED module rows are arranged in a second direction orthogonal to the first direction, and a plurality of the LEDs mounted on the LED module are arranged in a planar shape.

Images