Circuit board, power supply device, and lighting device

Abstract

To achieve both measurement of electrical characteristics of a life-limited component single unit and cost reduction.SOLUTION: A circuit board 1 has a plurality of electronic components 19 and a print circuit board 18. Each of the plurality of electronic components 19 includes a life-limited component 13, and composes a power supply circuit. On the print circuit board 18, the plurality of electronic components 19 are mounted. The life-limited component 13 has a first terminal 101 connected to a first part of the power supply circuit and a second terminal 102 connected to a second part of the power supply circuit. The print circuit board 18 is configured so that at least a part of one or more short circuit components 16 may be detachable. One or more short circuit components 16 make at least one of between the first part of the power supply circuit and the first terminal 101, and between the second part of the power supply circuit and the second terminal 102 short-circuit.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates generally to a circuit board, a power supply device, and a lighting device, and more particularly to a circuit board including a finite-life component, a power supply device including a circuit board, and a lighting device including a power supply device. [Background technology]

[0002] Patent Document 1 describes a power supply device that includes a plurality of capacitors (limited-life components) that smooth the voltage of an input power supply. The power supply device described in Patent Document 1 further includes a switching unit that can switch each capacitor to a state in which it is disconnected from the main line of the input power supply. The switching unit disconnects each capacitor from the main line of the input power supply and connects it to a capacitance measurement voltage signal line in accordance with a switching instruction signal from a switching instruction signal line. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-306850 A Summary of the Invention [Problem to be solved by the invention]

[0004] The power supply device described in Patent Document 1 requires a separate CPU that outputs a switching instruction signal to the switching unit, which increases costs accordingly. In other words, with the power supply device described in Patent Document 1, it may be difficult to simultaneously measure the electrical characteristics of each capacitor (parts with a finite life) and reduce costs.

[0005] An object of the present disclosure is to provide a circuit board, a power supply device, and a lighting device that are capable of achieving both measurement of the electrical characteristics of a single finite-life component and cost reduction. [Means for solving the problem]

[0006] A circuit board according to an embodiment of the present disclosure includes a plurality of electronic components and a printed wiring board. The plurality of electronic components include finite-life components and constitute a power supply circuit. The plurality of electronic components are mounted on the printed wiring board. The finite-life components have a first terminal connected to a first portion of the power supply circuit and a second terminal connected to a second portion of the power supply circuit. The printed wiring board is configured such that at least a portion of one or more short-circuit components are detachable. The one or more short-circuit components short-circuit at least one of between the first portion of the power supply circuit and the first terminal and between the second portion of the power supply circuit and the second terminal.

[0007] A power supply device according to one embodiment of the present disclosure includes the circuit board and the one or more short-circuit components.

[0008] A lighting device according to an aspect of the present disclosure includes the power supply device and a light source, the light source being turned on by power supplied from the power supply device. Effect of the Invention

[0009] According to the circuit board, power supply device, and lighting device according to one aspect of the present disclosure, it is possible to achieve both measurement of electrical characteristics of individual finite-life components and cost reduction. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of a power supply device and a lighting device including a circuit board according to an embodiment. [Diagram 2] FIG. 2 is a plan view of the circuit board of the above, with a portion thereof omitted. [Diagram 3] FIG. 3 is a side view, with some parts omitted, of the circuit board with the jumper wire removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a circuit board, a power supply device, and a lighting device according to an embodiment will be described with reference to the drawings. The drawings referred to in the following embodiments are schematic drawings, and the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensions, and the size ratios and thickness ratios between the components do not necessarily reflect the actual dimensional ratios.

[0012] (Embodiment) (1) Overview First, an overview of a circuit board 1, a power supply device 10, and a lighting device 100 according to an embodiment will be described with reference to FIGS. 1 to 3. FIG.

[0013] The circuit board 1 according to the embodiment includes a plurality of electronic components 19 (only one is shown in FIG. 2 ) and a printed wiring board 18. The plurality of electronic components 19 include a finite-life component 13 and constitute a power supply circuit 17. The plurality of electronic components 19 are mounted on the printed wiring board 18. The finite-life component 13 has a first terminal 101 connected to a first portion 171 of the power supply circuit 17 and a second terminal 102 connected to a second portion 172 of the power supply circuit 17. The printed wiring board 18 is configured such that a portion of one short-circuit component 16 (a jumper wire 162 in this embodiment) can be detached. The one short-circuit component 16 shorts between the first portion 171 and the first terminal 101 of the power supply circuit 17.

[0014] In the circuit board 1 according to the embodiment, the printed wiring board 18 is configured so that the jumper wire 162, which is a part of one short-circuit component 16, can be detached. Therefore, by removing the jumper wire 162 from the printed wiring board 18, it becomes possible to measure the electrical characteristics of the finite-life component 13 alone. Also, since it is only necessary to provide one short-circuit component 16, it becomes possible to reduce costs compared to the case where a separate CPU is provided. In other words, the circuit board 1 according to the embodiment makes it possible to achieve both measurement of the electrical characteristics of the finite-life component 13 alone and cost reduction.

[0015] Moreover, the power supply device 10 according to the embodiment includes a circuit board 1 and one short-circuit component 16. Furthermore, the lighting device 100 according to the embodiment includes the power supply device 10 and a light source 20. The light source 20 is turned on by power supplied from the power supply device 10. Since the power supply device 10 and the lighting device 100 according to the embodiment include the circuit board 1 according to the embodiment, it is possible to achieve both measurement of the electrical characteristics of the limited-life component 13 alone and cost reduction.

[0016] (2)Details Next, the configurations of the circuit board 1, the power supply device 10, and the lighting device 100 according to the embodiment will be described with reference to FIGS.

[0017] The lighting device 100 according to the embodiment includes a power supply device 10 and a light source 20, as shown in FIG.

[0018] (2.1) Power supply device The power supply device 10 is a device for supplying lighting power to the light source 20. As shown in Fig. 1, the power supply device 10 includes a power supply circuit 17, a pair of power supply terminals T11, T12, a pair of output terminals T21, T22, and one short-circuiting component 16. The power supply circuit 17 includes a transformer 11, a rectifier circuit 12, a finite-life component 13, a conversion circuit 14, and a control circuit 15. The power supply circuit 17 is configured by a plurality of electronic components 19 mounted on a printed wiring board 18 of a circuit board 1 described later. That is, the power supply device 10 includes the circuit board 1 and one short-circuiting component 16.

[0019] (2.1.1) Power terminal The pair of power supply terminals T11, T12 are terminals for inputting AC power supplied from the AC power supply 30 to the power supply device 10. One of the power supply terminals T11 is electrically connected to a first end of the AC power supply 30. The other power supply terminal T12 is electrically connected to a second end of the AC power supply 30.

[0020] (2.1.2) Output terminal The pair of output terminals T21, T22 are terminals for outputting DC power generated by the power supply device 10 to the light source 20. One output terminal T21 is electrically connected to a first terminal of the light source 20. The other output terminal T22 is electrically connected to a second terminal of the light source 20.

[0021] (2.1.3) Transformer The transformer 11 has a primary winding 111 and a secondary winding 112. The turns ratio between the primary winding 111 and the secondary winding 112 is, for example, 1:1. Therefore, the magnitude of the voltage applied to the primary winding 111 and the magnitude of the voltage applied to the secondary winding 112 are the same.

[0022] A first end of the primary winding 111 is electrically connected to one power supply terminal T11, and a second end of the primary winding 111 is electrically connected to the other power supply terminal T12.

[0023] A first end of the secondary winding 112 is electrically connected to one of a pair of AC input terminals of the rectifier circuit 12 described below. A second end of the secondary winding 112 is electrically connected to the other of the pair of AC input terminals.

[0024] (2.1.4) Rectifier circuit The rectifier circuit 12 is, for example, a diode bridge circuit in which four diodes are connected in a bridge shape. The rectifier circuit 12 has a pair of AC input terminals and a pair of pulsating current output terminals. As described above, one of the pair of AC input terminals is electrically connected to a first end of the secondary winding 112 of the transformer 11. As described above, the other of the pair of AC input terminals is electrically connected to a second end of the secondary winding 112 of the transformer 11.

[0025] One of the pair of pulsating current output terminals is electrically connected to the high potential side input terminal of the conversion circuit 14. The other of the pair of pulsating current output terminals is electrically connected to the low potential side input terminal of the conversion circuit 14.

[0026] (2.1.5) Limited life parts As shown in FIG. 1, the limited-life part 13 is, for example, a capacitor C1. The capacitor C1 is, for example, an aluminum electrolytic capacitor (hereinafter, also referred to as "aluminum electrolytic capacitor C1"). The limited-life part 13 has a first terminal 101 and a second terminal 102. The first terminal 101 of the limited-life part 13 is electrically connected to a first part 171 of the power supply circuit 17 via a short-circuit part 16 described later. The second terminal 102 of the limited-life part 13 is electrically connected to a second part 172 of the power supply circuit 17. In this embodiment, the capacitor C1 is, as shown in FIG. 2, a lead part (DIP part) having a pair of lead terminals 131, 132. Therefore, in this embodiment, one lead terminal 131 corresponds to the first terminal 101, and the other lead terminal 132 corresponds to the second terminal 102. That is, the first terminal 101 and the second terminal 102 are the lead terminals 131, 132 of the limited-life part 13 (capacitor C1).

[0027] 1, the first portion 171 of the power supply circuit 17 is a connection point of the first terminal 101 of the limited-life component 13 in the electric path R1 that connects one pulsating current output terminal of the rectifier circuit 12 and one input terminal of the conversion circuit 14. The second portion 172 of the power supply circuit 17 is a connection point of the second terminal 102 of the limited-life component 13 in the electric path R2 that connects the other pulsating current output terminal of the rectifier circuit 12 and the other input terminal of the conversion circuit 14.

[0028] It should be noted that a "limited-life part" is a part that has a lifespan, and in the case where limited-life part 13 is aluminum electrolytic capacitor C1, the lifespan of limited-life part 13 is, for example, 100,000 hours.

[0029] (2.1.6) Conversion circuit The conversion circuit 14 has a switching converter circuit such as a flyback converter circuit. The conversion circuit 14 is electrically connected in parallel with a capacitor C1 to a pair of pulsating output terminals of the rectifier circuit 12, and converts the pulsating voltage full-wave rectified by the rectifier circuit 12 into a DC voltage. The conversion circuit 14 applies a DC voltage to the light source 20 via a pair of output terminals T21, T22, and causes a current (forward current) to flow through the light source 20 to light up the light source 20. The conversion circuit 14 may be a switching converter circuit other than a flyback converter circuit.

[0030] (2.1.7) Control circuit The control circuit 15 controls the switching of a semiconductor switching element included in the conversion circuit 14 (switching converter circuit). The control circuit 15 controls the semiconductor switching element by PWM (Pulse Width Modulation), for example, to make the output current of the conversion circuit 14 (the forward current flowing through the light source 20) coincide with a target value.

[0031] (2.1.8) Shorting Parts The short-circuiting component 16 is a component that short-circuits at least one of between the first portion 171 of the power supply circuit 17 and the first terminal 101 of the limited-life component 13 and between the second portion 172 of the power supply circuit 17 and the second terminal 102 of the limited-life component 13. In this embodiment, the short-circuiting component 16 shorts between the first portion 171 of the power supply circuit 17 and the first terminal 101 of the limited-life component 13, as shown in FIG. 1 . That is, the power supply device 10 according to the embodiment includes one short-circuiting component 16.

[0032] 2 and 3, the short-circuit component 16 includes a socket 161 and a jumper wire 162. The socket 161 is mounted on a printed wiring board 18 of the circuit board 1, which will be described later. The jumper wire 162 has, for example, an inverted U-shape in a plan view, and is detachable from the socket 161 mounted on the printed wiring board 18 (see arrow A1 in FIG. 3).

[0033] 2, when the jumper wire 162 is attached to the socket 161, the first terminal 101 of the limited-life part 13 and the first part 171 of the power supply circuit 17 are short-circuited via the socket 161 and the jumper wire 162. On the other hand, when the jumper wire 162 is removed from the socket 161, as shown in Fig. 3, the first terminal 101 of the limited-life part 13 and the first part 171 of the power supply circuit 17 are open.

[0034] (2.2) Light source The light source 20 is turned on by power supplied from the power supply device 10. The light source 20 has a plurality of light-emitting elements. Each of the plurality of light-emitting elements is, for example, a light-emitting diode (LED). The plurality of light-emitting elements may be connected in series, in parallel, or in series-parallel. Note that the plurality of light-emitting elements are not limited to light-emitting diodes, and may be, for example, organic electroluminescence elements.

[0035] (2.3) Circuit Board 2 and 3, the circuit board 1 includes a plurality of electronic components 19 (only one is shown in FIG. 2) and a printed wiring board 18. The plurality of electronic components 19 includes a finite-life component 13 and constitutes a power supply circuit 17. The plurality of electronic components 19 are mounted on the printed wiring board 18. In addition, a socket 161, which is a part of the short-circuit component 16, is mounted on the printed wiring board 18.

[0036] The finite-life component 13 is mounted on the printed wiring board 18 by soldering the first terminal 101 and the second terminal 102 through two corresponding through holes provided in the printed wiring board 18. The socket 161 of the short-circuit component 16 has two connection terminals, and is mounted on the printed wiring board 18 by soldering the two connection terminals through two corresponding through holes provided in the printed wiring board 18.

[0037] 2, the first terminal 101 of the finite-life part 13 is electrically connected to one connection terminal of the socket 161 via a wiring pattern portion 181 provided on the back side of the printed wiring board 18. The other connection terminal of the socket 161 is electrically connected to a first portion 171 of the power supply circuit 17 via a wiring pattern portion 182 provided on the back side of the printed wiring board 18. The second terminal 102 of the finite-life part 13 is electrically connected to a second portion 172 of the power supply circuit 17 via a wiring pattern portion 183 provided on the back side of the printed wiring board 18.

[0038] Therefore, by attaching jumper wire 162 to socket 161 mounted on printed wiring board 18, it is possible to short-circuit first terminal 101 of limited-life component 13 and first portion 171 of power supply circuit 17 via socket 161 and jumper wire 162. Also, by removing jumper wire 162 from socket 161, it is possible to open between first terminal 101 of limited-life component 13 and first portion 171 of power supply circuit 17. In this way, printed wiring board 18 is configured such that a part (jumper wire 162) of short-circuit component 16 that shorts between first portion 171 of power supply circuit 17 and first terminal 101 is detachable.

[0039] Incidentally, in the case of using the circuit board 1 according to the embodiment as the power supply circuit 17, a jumper wire 162 is attached to a socket 161 mounted on the printed wiring board 18 to short-circuit the first terminal 101 of the finite-life part 13 and the first part 171 of the power supply circuit 17. On the other hand, by removing the jumper wire 162 from the socket 161 mounted on the printed wiring board 18, it becomes possible to disconnect the finite-life part 13 from the power supply circuit 17. This makes it possible to measure the electrical characteristics of the finite-life part 13 alone.

[0040] (3) Effects In the circuit board 1 according to the embodiment, the printed wiring board 18 is configured so that the jumper wire 162, which is a part of one short-circuit component 16, can be detached. Therefore, by removing the jumper wire 162 from the printed wiring board 18, it becomes possible to measure the electrical characteristics of the finite-life component 13 alone. Also, since it is only necessary to provide one short-circuit component 16, it becomes possible to reduce costs compared to the case where a separate CPU is provided. In other words, the circuit board 1 according to the embodiment makes it possible to achieve both measurement of the electrical characteristics of the finite-life component 13 alone and cost reduction.

[0041] In the circuit board 1 according to the embodiment, one short-circuit component 16 includes a socket 161 mounted on the printed wiring board 18 and a jumper wire 162 that is detachable from the socket 161. Therefore, by simply removing the jumper wire 162 from the socket 161, it becomes possible to measure the electrical characteristics of the finite-life component 13 alone.

[0042] In the circuit board 1 according to the embodiment, the finite-life part 13 is an aluminum electrolytic capacitor C1. Therefore, by removing the jumper wire 162 from the socket 161, it becomes possible to measure the electrical characteristics of the aluminum electrolytic capacitor C1 alone.

[0043] In the circuit board 1 according to the embodiment, the first terminal 101 and the second terminal 102 are lead terminals 131, 132 of the finite-life part 13. This has the advantage that the first terminal 101 and the second terminal 102 do not need to be provided separately.

[0044] Since the power supply device 10 and the lighting device 100 according to the embodiment include the above-mentioned circuit board 1, it becomes possible to simultaneously measure the electrical characteristics of the finite-life part 13 alone and reduce costs.

[0045] (4) Variations The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. Below, modifications of the above-described embodiment are listed. The modifications described below can be applied in appropriate combination.

[0046] In the above embodiment, the finite life part 13 is the aluminum electrolytic capacitor C1, but the finite life part 13 may be any part that has a life and is included in the plurality of electronic components 19 that constitute the power supply circuit 17. In other words, the finite life part 13 is not limited to the aluminum electrolytic capacitor C1, and may be, for example, a film capacitor or a coil that constitutes the power supply circuit 17.

[0047] In the above embodiment, the aluminum electrolytic capacitor C1 which is the finite life component 13 is a lead component (DIP component). However, the finite life component 13 is not limited to a lead component and may be a chip component surface-mounted on the printed wiring board 18.

[0048] In the above-described embodiment, the short-circuit component 16 is composed of a socket 161 and a jumper wire 162, but the short-circuit component 16 may be composed of one component or three or more components as long as it is detachable from the printed wiring board 18.

[0049] In the above embodiment, the short-circuiting component 16 is provided between the first portion 171 of the power supply circuit 17 and the first terminal 101 of the limited-life component 13, but a short-circuiting component may be provided between the second portion 172 of the power supply circuit 17 and the second terminal 102 of the limited-life component 13. Also, a short-circuiting component may be provided between the first portion 171 of the power supply circuit 17 and the first terminal 101 of the limited-life component 13, and between the second portion 172 of the power supply circuit 17 and the second terminal 102 of the limited-life component 13. That is, it is sufficient that a short-circuiting component is provided at least one between the first portion 171 of the power supply circuit 17 and the first terminal 101 of the limited-life component 13, and between the second portion 172 of the power supply circuit 17 and the second terminal 102 of the limited-life component 13. In other words, printed wiring board 18 only needs to be configured so that at least a portion of one or more short-circuiting components that short-circuit at least one of the gaps between first portion 171 of power supply circuit 17 and first terminal 101, and between second portion 172 of power supply circuit 17 and second terminal 102, are removable.

[0050] (Aspect) The present specification discloses the following aspects.

[0051] The circuit board (1) according to the first aspect includes a plurality of electronic components (19) and a printed wiring board (18). The plurality of electronic components (19) includes a finite-life component (13) and constitutes a power supply circuit (17). The printed wiring board (18) has the plurality of electronic components (19) mounted thereon. The finite-life component (13) has a first terminal (101) connected to a first portion (171) of the power supply circuit (17) and a second terminal (102) connected to a second portion (172) of the power supply circuit (17). The printed wiring board (18) is configured such that at least a part of one or more short-circuit components (16) is detachable. The one or more short-circuit components (16) short-circuit at least one of between the first portion (171) and the first terminal (101) of the power supply circuit (17) and between the second portion (172) and the second terminal (102) of the power supply circuit (17).

[0052] According to this embodiment, it is possible to achieve both measurement of the electrical characteristics of the finite-life part (13) alone and cost reduction.

[0053] In the circuit board (1) of the second aspect, in the first aspect, the one or more short-circuit components (16) include a socket (161) mounted on the printed wiring board (18) and a jumper wire (162) that is detachable from the socket (161).

[0054] According to this embodiment, it is possible to measure the electrical characteristics of the finite-life part (13) by itself, simply by removing the jumper wire (162) from the socket (161).

[0055] In the circuit board (1) according to the third aspect, in the first or second aspect, the finite-life part (13) is an aluminum electrolytic capacitor (C1), a film capacitor, or a coil.

[0056] According to this embodiment, it is possible to measure the electrical characteristics of the aluminum electrolytic capacitor (C1) alone, the film capacitor alone, or the coil alone, simply by removing the jumper wire (162) from the socket (161).

[0057] In the circuit board (1) according to the fourth aspect, in any one of the first to third aspects, the first terminal (101) and the second terminal (102) are lead terminals (131, 132) of a finite-life part (13), respectively.

[0058] This embodiment has the advantage that it is not necessary to separately provide the first terminal (101) and the second terminal (102).

[0059] A power supply device (10) according to a fifth aspect includes the circuit board (1) according to any one of the first to fourth aspects, and one or more short-circuit components (16).

[0060] According to this embodiment, it is possible to achieve both measurement of the electrical characteristics of the finite-life part (13) alone and cost reduction.

[0061] A lighting device (100) according to a sixth aspect includes the power supply device (10) according to the fifth aspect and a light source (20). The light source (20) is turned on by power supplied from the power supply device (10).

[0062] According to this embodiment, it is possible to achieve both measurement of the electrical characteristics of the finite-life part (13) alone and cost reduction.

[0063] The configurations according to the second to fourth aspects are not essential for the circuit board (1) and may be omitted as appropriate. [Explanation of symbols]

[0064] 1 Circuit Board 10 Power supply 13 Limited life parts 16 Shorting Parts 17 Power circuit 18 Printed Wiring Boards 19 Electronic Components 20 light source 100 Lighting Equipment 101 1st terminal 102 2nd terminal 131,132 Lead terminal 161 Sockets 162 Jumper Wire 171 Part 1 172 Part 2 C1 Aluminum electrolytic capacitor

Claims

1. A plurality of electronic components including a finite-life component that configure a power supply circuit; a printed wiring board on which the plurality of electronic components are mounted, The said limited life part is a first terminal connected to a first portion of the power supply circuit; a second terminal connected to a second portion of the power supply circuit; the printed wiring board is configured such that at least a part of one or more short-circuiting components that short-circuit at least one of between the first portion of the power supply circuit and the first terminal and between the second portion of the power supply circuit and the second terminal is detachably attached. Circuit board.

2. The one or more short-circuit components include a socket mounted on the printed wiring board; A jumper wire that is detachable from the socket. The circuit board according to claim 1 .

3. The finite-life part is an aluminum electrolytic capacitor, a film capacitor, or a coil. The circuit board according to claim 1 .

4. Each of the first terminal and the second terminal is a lead terminal of the part with a limited life. The circuit board according to claim 1 .

5. A circuit board according to any one of claims 1 to 4, The one or more short-circuit components. power supply.

6. The power supply device according to claim 5 ; A light source that is lit by power supplied from the power supply device. Lighting equipment.

Images