JP2009032680A - Power unit and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power unit having installability and long-life characteristics allowing a favorable use in LED lighting including a use for visible light communication, and to provide a lighting device employing the power unit. <P>SOLUTION: The power unit 301 comprises an electric power supply 302 that generates a direct current, and also includes: a terminal block 305 related to the feeding of power to the electric power supply; a terminal block 307 related to the distribution of the direct current; and a base plate 304 holding the electric power supply 302, the terminal block 305 and the terminal block 307, wherein the terminal block 305 and the terminal block 307 include receiving and feeding terminals 305a and 305b and receiving and feeding terminals 307a and 307b, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a power supply unit, and more particularly to a power supply unit for driving a light source unit including a solid light emitting element. The present invention also relates to a lighting device using a power supply unit.

  In recent years, environmental awareness has increased, and solid-state light-emitting elements, particularly light-emitting diodes, have attracted attention as new light sources that can replace incandescent bulbs, fluorescent lamps, mercury lamps, and other lamps. This is because the light emitting diode is a light source that has a longer life than the light sources of the lamps described above, and does not contain harmful substances such as mercury and lead, that is, it is an environmentally friendly light source.

  Among light-emitting diodes, a so-called high-power light-emitting diode (hereinafter referred to as LED) having an input capacity of 1 W or more has high emission intensity and is optimal for lighting applications. In addition, the light conversion efficiency of LEDs has been improving year by year, and in the future, illumination using LEDs as light sources is also expected to be energy-saving light sources.

  Here, one of the features of the LED is that it has high responsiveness. For this reason, studies on so-called visible light communication, in which information is communicated by modulating direct current used for driving, have been deepened.

In view of the above, the lighting device disclosed in Patent Document 1 is supposed to realize optical communication (visible light communication) while maintaining sufficient illuminance for illumination.
JP 2006-74323 A JP 2004-303431 A JP-A-8-241133 JP 2002-367413 A

  However, it can be considered that the lighting device disclosed in Patent Document 1 has problems in the following points.

  First, it does not touch on the installation of the lighting device. In general, a large number of lighting devices are generally installed in offices and the like, and in order to ensure the ease of installation, in fact, visible light communication, more specifically, lighting using LEDs as a light source is widespread. I think it is necessary to do it.

  One of the features of LEDs is that they have a long life. In order to realize these features and realize a maintenance-free lighting device, the length of a power supply unit (power supply device) that supplies direct current to the LED is long. It is necessary to extend the service life. Patent Document 1 does not mention this.

  The present invention has been made in view of the above-described circumstances, and uses a power supply unit that can be suitably used for LED illumination including visible light communication applications and has a long service life and the power supply unit. An object is to provide a lighting device.

  In order to achieve the above object, a power supply unit of the present application includes a power supply device that generates direct current, and includes a first terminal unit for supplying power to the power supply device and the distribution of the direct current. The second terminal portion, the power supply device, the first terminal portion, and holding means for holding the second terminal portion are provided, and the first terminal portion and the second terminal portion are respectively provided. A receiving side terminal and a sending side terminal are provided.

  With this configuration, the power supply unit can easily perform the feed wiring. In offices and the like, since a large number of lighting devices are installed, it is preferable that the power supply unit can easily perform the feed wiring.

  Here, the receiving terminal of the first terminal portion is electrically connected to the sending terminal of the first terminal portion and is also electrically connected to the power supply device, and the receiving side of the second terminal portion. The terminal is electrically connected to the feed-side terminal of the second terminal portion and is also electrically connected to the power supply device, and the feed terminal of the second terminal portion receives at least one or more of the direct currents. It may be electrically connected to a predetermined device.

  With this configuration, there is an effect that direct current can be supplied to a plurality of predetermined devices by the power supply device provided in the power supply unit.

Here, the holding means may be a flat surface made of metal and have a thickness of 1 mm or more.
With this configuration, there is an effect that the power supply device, the first terminal portion, and the second terminal portion are appropriately held, and heat generated as a loss in the power supply device can be appropriately radiated using the holding means.

  Here, the holding means further holds a third terminal portion related to distribution of the instruction signal of the power supply device, and the third terminal portion includes a receiving side terminal and a sending side terminal, The receiving terminal of the three terminal portion is connected to the sending terminal of the third terminal so that the instruction signal can be distributed, and also connected to the power supply apparatus so that the instruction signal can be distributed. May be.

  With this configuration, there is an effect that the instruction signal supplied to the light source unit can also be supplied by the feed wiring. The instruction signal includes not only a signal indicating the reference operating point of the light source unit but also information for visible light communication.

  Here, the illumination device includes the power supply unit and the light source unit, wherein the light source unit is the predetermined device and includes a plurality of solid state light emitting elements, A pulsating flow converting means for converting a sinusoidal voltage supplied via the first terminal portion into a pulsating flow voltage; and an on-time for passing the pulsating flow voltage output from the pulsating flow converting means; Switch means for outputting after controlling the duty ratio which is a ratio with the off time not to pass, Transformer means for transforming the voltage of the pulsating current controlled by the duty ratio output from the switch means, and the transform means A smoothing means for smoothing the voltage of the pulsating current transformed from the output, a pulsating flow conversion means, the switch means, the transformer means, and a housing having therein the smoothing means. , At least one surface constituting the Kikatamitai is a metal plane composed of flat and metal, the metal plane may have a thickness of at least 1 mm.

  With this configuration, the metal flat surface, which is at least one surface of the casing that constitutes the power supply device, has a predetermined thickness, so that distortion or the like does not occur. Therefore, it becomes easy to use the metal surface in close contact with other members. As a result, the heat generated as a loss in the pulsating flow conversion means, switch means, transformer means, and smoothing means provided in the housing can be appropriately dissipated, and the life of the power supply device can be extended. The plan comes true.

  Here, the power supply apparatus further includes a substantially rectangular mounting board on which the pulsating flow conversion means, the switch means, the transformer means, and the smoothing means are mounted, and the transformer means includes the transformer device. The winding element may be mounted on the mounting board in a state where the central axis has an angle of 30 degrees to 60 degrees with respect to the long side direction of the mounting board. Furthermore, the width of the mounting board in the short side direction may be narrower than the width along the central axis of the winding element.

  With this configuration, it is possible to reduce the size of the mounting substrate, and thus it is possible to reduce the size of the power supply device.

  Here, an electrical insulator may be inserted between the back surface of the mounting substrate with respect to the surface on which the winding element is mounted and the surface of the housing facing the back surface.

  With this configuration, when a single-side mounting type mounting substrate is used as the mounting substrate, there is an effect that it is possible to prevent an electrical short circuit from occurring at an unnecessary portion.

  Here, the pulsating flow converting means and the smoothing means further include a rectifying element having a heat radiating electrode, and the switching means further includes a switching element having a heat radiating electrode, the rectifying element, and the switching The heat dissipation electrode of the element may be disposed in close contact with the metal plane.

  With this configuration, there is an effect that heat in the rectifying element and the switching element, which are elements that generate a large amount of heat, can be appropriately processed through the metal plane.

  Here, at least two of the rectifying element and the switching element may be disposed close to each other, and the heat dissipation electrode may be fixed in close contact with the metal plane by a single fixing plate. .

  With this configuration, there are effects that the number of parts can be reduced and the rectifying element and the heat radiation electrode of the switching element can be securely arranged on the metal plane.

  Here, a part of the circuit elements constituting the pulsating flow conversion means, the switch means, the transforming means, and the smoothing means are mounted on one mounting surface of the mounting board, and the pulsating flow conversion Remaining circuit elements constituting the means, the switch means, the transformer means, and the smoothing means are mounted on the other mounting surface of the mounting board, All of the elements, the rectifying element, and the switching element may be included, and the remaining circuit elements may have a mounting height of an arbitrary value or less.

  With this configuration, there is an effect that circuit elements can be optimally arranged using a mounting substrate of a double-sided mounting type, and thus the power supply device can be reduced in size.

  Here, the surface constituting the housing facing the other mounting surface of the mounting substrate may be formed of an electrical insulator. Further, an electrical insulator may be inserted between the other mounting surface of the mounting substrate and a surface constituting the housing facing the other mounting surface of the mounting substrate.

  With this configuration, when a double-sided mounting type mounting board is used, an electrical short circuit can be prevented from being generated at an unnecessary portion.

  Here, the holding means may be disposed in close contact with the metal flat surface and a surface of the member having a flat surface, and the surface area of the member may be larger than the surface area of the holding means.

  With this configuration, heat can be radiated through the holding means with a wider surface area, and the heat radiating effect can be enhanced.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply unit which comprises the ease of installation which can be used suitably for LED illumination including a visible light communication use, long-life property, and the illuminating device using this power supply unit can be provided.

  Hereinafter, embodiments of a lighting device according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the configuration of the illumination device according to Embodiment 1 of the present invention will be described.

  FIG. 1 is a perspective view showing the appearance of the illumination device 1 of the present invention. FIG. 2 is a cross-sectional view showing the structure of the A direction surface of the power supply device 2. FIG. 3 is a cross-sectional view showing the structure of the light source unit 3 in the B direction.

  As shown in FIG. 1, the illumination device 1 includes a power supply device 2 and a light source unit 3. As shown in FIG. 2, the power supply device 2 includes a plurality of circuit elements and a substrate 21 therein. As shown in FIG. 3, the light source unit 3 includes a housing portion 31, and includes a plurality of solid light emitting elements 32, a substrate 33, and a protective translucent plate 34 inside the housing portion 31.

  The power supply device 2 is a chopstick box type, and includes a power supply cable 4, a housing 5, and a wiring cable 6. The power supply device 2 converts alternating current power into direct current and supplies direct current to the light source unit 3.

  The power supply cable 4 is used for the power supply device 2 to use an AC power supply such as a commercial power supply, and connects the commercial power supply 42 and the power supply device 2.

  The housing 5 is a chopstick box type case and has an appearance on the power supply device 2. Here, for example, the size of the housing 5 is the same size as the chopstick box. In addition, the housing 5 accommodates circuit elements constituting the power supply device 2 therein. The housing 5 is made of a material having high thermal conductivity (preferably 200 W / m · K or more). For example, the inventors selected aluminum as a material having high thermal conductivity and high workability, and configured the casing 5 using aluminum.

  The wiring cable 6 is a cable that electrically connects the power supply device 2 and the light source unit 3.

  The light source unit 3 causes a solid light emitting element 32 such as an internal LED to emit light using a direct current supplied from the power supply device 2.

The casing 31 has a substantially U-shaped cross section. The casing 31 is made of a metal having a high thermal conductivity (preferably, a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). For example, the housing part 31 is made of aluminum. The reason why aluminum is used for the housing part 31 is that it is inexpensive, easy to form, has good recyclability, has a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more, and heat dissipation characteristics. Is high.

  Further, it is desirable that the casing 31 is made of aluminum and then anodized. Alumite treatment increases the surface area and enhances the heat dissipation effect.

  The protective translucent plate 34 has translucency and is disposed in the light emitting direction of the solid state light emitting device 32. The protective translucent plate 34 is formed in a flat plate shape. By integrally combining the casing 31 and the protective translucent plate 34, the cross section becomes a substantially square shape.

  The protective translucent plate 34 is formed of transparent glass, acrylic resin, polycarbonate, or the like. Fine irregularities are unevenly formed on the front or back surface of the protective translucent plate 34 by surface treatment. This surface treatment can be easily performed, for example, by applying a sandblast method. The protective translucent plate 34 protects the solid light emitting element 32 and the like disposed inside the light source unit 3. Further, the protective translucent plate 34 plays a role of diffusing light emitted from the solid state light emitting device 32. The light emitted from the solid state light emitting element 32 has a strong directivity and tends to be irradiated locally. By diffusing the light emitted from the solid-state light emitting element 32 with the surface-treated protective translucent plate 34, the directivity of the light can be weakened and the light can be irradiated uniformly over a wide area.

  The shape of the light source unit 3 is not limited to the above. For example, the cross section in a state in which the casing 31 and the protective translucent plate 34 are integrally combined may be circular. Further, the casing 31 may be cylindrical, prismatic or the like, and a protective translucent plate 34 may be provided at the end thereof. In addition, it may be arbitrary.

The substrate 33 is disposed inside a hollow structure formed by the casing portion 31 and the protective translucent plate 34. The board | substrate 33 is formed in the surface of the surface facing the protective translucent board 34 inside a hollow structure. The substrate 33 is made of a metal having a high thermal conductivity (preferably a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). Preferably, the casing 31 is made of the same material. For example, the substrate 33 is made of aluminum.

  The plurality of solid state light emitting elements 32 are disposed on the substrate 33. The plurality of solid state light emitting elements 32 are, for example, light emitting diodes. The solid state light emitting device 32 is a so-called high power light emitting diode whose power consumption per unit is 1 W or more, and is a surface mount type light emitting diode. A high power light emitting diode has high luminous intensity and is suitable for lighting device applications. When the illuminating device 1 is used as general illumination, the luminescent color of the solid-state light emitting element 32 to be used is preferably daylight, daylight white, white, warm white, or light bulb color. Specifically, for example, the plurality of solid-state light emitting elements 32 include daylight colors, daylight whites, whites, and warm whites defined in 4.2 “Chromaticity Range” of JISZ9112 “Classification by light source color and color rendering of fluorescent lamps”. Or it emits light corresponding to the color of the bulb.

  Here, it is preferable that the housing portion 31 and the substrate 33 are brought into contact with each other. This is because if air enters between the housing part 31 and the substrate 33, heat conduction between the housing part 31 and the substrate 33 is hindered, which makes it impossible to perform more efficient heat treatment. is there. That is, it is preferable to increase the adhesion between the casing 31 and the substrate 33 by configuring the casing 31 and the substrate 33 with the same material. Furthermore, it is preferable to perform press working to further improve the adhesion.

  When performing the press work, a material having adhesiveness (for example, an adhesive or a double-sided tape without a base material) (not shown) is sandwiched between the casing portion 31 and the substrate 33, and the adhesiveness between the two. Is preferably increased.

  When using a double-sided tape, it is important to select one that does not contain a substrate. This is because the base material has a low thermal conductivity, so that the heat conduction from the casing 31 to the substrate 33 is hindered.

  It is also preferable to divide the substrate 33 into a plurality of pieces. This is to prevent the adhesion between the casing 31 and the substrate 33 from deteriorating when the temperature of the light source unit 3 rises when the linear expansion coefficients of the casing 31 and the substrate 33 are different. is there. By dividing the substrate 33, the length in the longitudinal direction of each substrate 33 is shortened. Thereby, the expansion amount per one board | substrate 33 becomes small. Therefore, it becomes easy to absorb the difference in expansion between the casing portion 31 and the substrate 33 with an adhesive material, so that the adhesion between the casing portion 31 and the substrate 33 can be easily maintained. This method of dividing the substrate 33 is particularly effective when the length of the light source unit 3 in the longitudinal direction is long.

  Next, the illuminating device 1 of this invention is demonstrated concretely using drawing. FIG. 4 is a functional block diagram of the lighting device 1 of the present invention.

  The illuminating device 1 is an illuminating device that illuminates by emitting a plurality of solid state light emitting elements using an AC power source, and includes a rectifying unit 43, a converting unit 44, a smoothing unit 45, a detecting unit 46, an instruction A unit 47, a selection unit 48, and a setting unit 49 are provided.

  The illuminating device 1 supplies direct current to the light emitting unit 50 including a plurality of solid state light emitting elements 32 by using an alternating current power source supplied from a commercial power source 42 that is an external power source. Make it emit light.

  The commercial power source 42 is a power source that is supplied from an electric power company to, for example, ordinary households and offices and supplies alternating current to the lighting device 1.

  The rectifying unit 43 corresponds to the pulsating flow conversion means of the present invention, and converts the alternating voltage supplied from the commercial power supply 42 into a pulsating flow. That is, the AC voltage supplied from the commercial power source 42 is full-wave rectified, and the full-wave rectified waveform is output to the conversion unit 44.

  The conversion unit 44 corresponds to the switch unit and the transformation unit of the present invention, and has a duty ratio that is a ratio of an on time during which the pulsating flow output from the rectifying unit 43 is allowed to pass and an off time during which the pulsating flow is not allowed to pass. A voltage having a controlled pulse waveform is generated and the voltage is transformed.

  Specifically, the full-wave rectified waveform (pulsating flow) output from the rectifier 43 is divided at predetermined time intervals. The full-wave rectified waveform divided into the predetermined time intervals is converted into a pulse-shaped waveform voltage whose duty ratio is controlled within each period of the predetermined time interval. Then, it is sent to the winding element.

  When a transformer is used as the winding element, the voltage having the pulse waveform is transformed by being sent to the primary side of the transformer and output to the secondary side of the transformer.

  Here, when the voltage sent to the primary side is transformed and outputted to the secondary side, the transformer provided in the conversion unit 44 boosts the voltage at a predetermined boost rate. This step-up rate can be set by the winding ratio of the primary side and the secondary side. The boosting rate may be any value, but in the test conducted by the inventors, it was optimal to boost the pressure by 2 to 3 times.

A step-up coil may be used as the winding element.
The conversion unit 44 realizes the above by being controlled by the selection unit 48.

  Moreover, the reason why the voltage is boosted by the winding element as described above is to improve the power factor of the lighting device 1. Although the light emission part 50 is comprised with a solid light emitting element (for example, LED), a solid light emitting element has a forward voltage. The forward voltage is a voltage generated between two terminals of the solid state light emitting device when a forward current flows through the solid state light emitting device (that is, when the solid state light emitting device emits light).

  Conversely, unless a forward voltage is applied, a forward current cannot flow through the solid state light emitting device. Therefore, a voltage corresponding to the forward voltage must be applied in order to cause a forward current to flow through the solid state light emitting device, that is, to cause the solid state light emitting device to emit light.

  The light emitting unit 50 includes one or a plurality of solid state light emitting elements 32, and the voltage (forward voltage) necessary for causing the light emitting unit 50 to emit light is determined by the configuration of the light emitting unit 50.

  If the voltage supplied to the solid state light emitting device 32 is lower than the necessary voltage determined by the configuration of the light emitting unit 50, no forward current flows through the light emitting unit 50 (that is, no light is emitted).

  The voltage input to the winding element is based on the full-wave rectified waveform as described above, and the voltage value varies with time. That is, when the voltage is not boosted, there is a concern that the time zone below the necessary voltage determined by the light emitting unit 50 increases (that is, the time zone in which the forward current flows through the light emitting unit 50 decreases) (this This generally means that the power factor decreases or the flow angle decreases).

  Therefore, by increasing the voltage, the time zone exceeding the necessary voltage determined by the light emitting unit 50 is increased, and the time zone in which the forward current flows in the light emitting unit 50 is increased. Thereby, the power factor of the illuminating device 1 can be improved (a distribution angle can be expanded).

  The smoothing unit 45 corresponds to the smoothing means of the present invention, smoothes the voltage of the pulse waveform sent from the conversion unit 44, and supplies direct current to the light emitting unit 50.

  The detection unit 46 corresponds to the detection unit of the present invention, and the operating point of the light emitting unit 50 in a state where the direct current is supplied and driven by the power supply device 2 and a predetermined element inside the conversion unit 44, such as a winding, for example. Information related to the temperature of the smoothing capacitor when a smoothing capacitor is used for the line element, the housing 5 of the power supply device 2, the solid state light emitting element 32 constituting the light emitting unit 50, or the rectifying unit 43 is detected. Here, the operating point is calculated by a product of forward voltages generated when a current is passed through the solid state light emitting element 32 constituting the light emitting unit 50, that is, a product of (current) × (forward voltage). .

Moreover, you may detect the information regarding the said various temperatures using a thermocouple etc.
Note that the information regarding the temperature of the solid state light emitting element 32 constituting the light emitting unit 50 may be obtained based on the current of the light emitting unit 50 and the forward voltage. This is because the current and forward voltage characteristics vary depending on the temperature of the solid state light emitting device 32. This is because it is possible to detect information related to the temperature of the solid-state light emitting element 32 by using this fact.

  The instruction unit 47 corresponds to a part of the instruction means of the present invention, and the operation point detected by the detection unit 46 and a reference operation point set in advance by the setting unit 49 (hereinafter referred to as a reference operation point). ) To determine a target operating point of the light emitting unit 50 (hereinafter referred to as a target operating point). The instruction unit 47 controls the selection unit 48 to realize the target operating point.

  The selection unit 48 corresponds to the remaining part of the instruction unit of the present invention, and based on the instruction from the instruction unit 47, can realize the target operating point, and the electric energy of the pulse waveform within each period of the predetermined time interval Is calculated. The selection unit 48 controls the conversion unit 44 to realize the calculated electric energy.

  Further, the selection unit 48 performs control related to the change of the duty ratio on the conversion unit 44 based on the information regarding the temperature detected by the detection unit 46.

The setting unit 49 sets an operation point (reference operation point) that serves as a reference for the light emitting unit 50.
Here, a reference operation of the light emitting unit 50 is performed by inputting information to the setting unit 49 from the outside of the lighting device 1 using a predetermined communication line such as infrared communication, wireless communication, or wired communication. A point may be set.

  The light emitting unit 50 corresponds to the light source unit 3 and emits light from the plurality of solid state light emitting elements 32. Specifically, one or a plurality of solid state light emitting elements 32 are provided. The solid light emitting element 32 is, for example, an LED.

FIG. 5 is a diagram illustrating a schematic circuit configuration of the illumination device 1.
The illuminating device 1 shown in FIG. 4 can be realized by taking the configuration of a schematic circuit diagram as shown in FIG. Of course, the circuit configuration is not limited to this, and any circuit configuration capable of realizing the functions described with reference to FIG. 4 may be used.

  The rectifying unit 43 includes an inductor 51, an inductor 52, a capacitor 53, and a diode bridge 54.

  The inductor 51, the inductor 52, and the capacitor 53 are protection circuits that protect against external disturbances. Therefore, the capacitor 53 is not a smoothing capacitor. By the way, the smoothing capacitor is required to have a large capacity. Therefore, an ordinary electrolytic capacitor is used. However, this type of capacitor has problems in size and life.

  The capacitor 53 is intended to protect the lighting device 1 from external disturbance as described above, and may have a small capacity. Therefore, for example, a small and long-life capacitor such as a ceramic capacitor is used.

  In addition, when the capacitor | condenser 53 is used as a smoothing capacitor when comprising the rectification | straightening part 43, it is preferable to select sufficient components and to apply a long-life product. It is also preferable to detect information about the temperature and control the duty ratio based on the detected information. By doing in this way, even when the capacitor | condenser 53 is made into a smoothing capacitor, it has confirmed that the lifetime improvement of the illuminating device 1 (power supply device 2) is realizable at a high level.

The diode bridge 54 is a full-wave rectifier that outputs a full-wave rectified alternating current. FIG. 6 is a diagram illustrating an output waveform of the diode bridge 54 that rectifies the alternating current.

  The diode bridge 54 rectifies an AC waveform as shown in FIG. 6A, and forms and outputs a full-wave rectified waveform as shown in FIG. 6B.

  The conversion unit 44 includes a field effect transistor (hereinafter referred to as FET) 56 and 58, a transformer 59, a terminal pair A and A ′ as an input terminal pair, and a terminal pair B and B ′ as an output terminal pair. Composed. The FET 56 and the FET 58 operate according to instructions from the driver 55 and the driver 57 constituting the selection unit 48. When the operation is instructed, the terminal pair B and B ′ which are output terminal pairs of the transformer 59 in the conversion unit 44 Generate an on-pulse. In other words, in the converter 44, based on the controlled duty ratio, the voltage of the full-wave rectified waveform output from the rectifier 43 is transmitted to the primary side of the transformer 59 provided in the converter 44. During a certain on time, a pulse waveform (on pulse) is output on the secondary side of the transformer 59 provided in the conversion unit 44.

  Further, when instructed as non-operation, an off pulse is generated at the terminal pair B and B ′ which is the output terminal pair of the transformer 59 in the conversion unit 44. In other words, in the converter 44, based on the controlled duty ratio, the voltage of the full-wave rectified waveform output from the rectifier 43 is not sent to the primary side of the transformer 59 provided in the converter 44. During a certain off time, nothing is output as a voltage (an off pulse is output) on the secondary side of the transformer 59 provided in the conversion unit 44.

  Here, the transformer 59 boosts the input voltage at a predetermined boosting rate and outputs the boosted voltage (a so-called boosting transformer). This is intended to improve the power factor.

  Note that the converter 44 can be configured using a booster coil (not shown) instead of the transformer 59.

  The smoothing unit 45 includes a diode 61, a diode 62, and a capacitor 63. The voltage of the pulse waveform from the terminal pair B and B ′ of the transformer 59 in the conversion unit 44 is smoothed by circuit elements from the diode 61, the diode 62, and the capacitor 63. A direct current is supplied from the smoothing unit 45 to the light emitting unit 50.

  The detection unit 46 includes a resistor 64, a resistor 65, a thermocouple 60 a, a thermocouple 60 b, and a controller unit 68.

  The current flowing through the light emitting unit 50 can be detected by the resistor 64, and the forward voltage of the light emitting unit 50 can be detected by the resistor 65. Information on the current value and the voltage value detected by the resistors 64 and 65 is sent to the controller unit 68.

  The controller unit 68 obtains the operating point from the above information. Here, the operating point is the product of the current value detected by the resistor 64 and the forward voltage value detected by the resistor 65, as described above. The controller unit 68 includes an internal memory (not shown) as a storage unit.

  The internal memory stores information on the current value detected by the resistor 64, the forward voltage value detected by the resistor 65, and the operating point obtained based on the current value, and holds the information as history information.

  The thermocouples 60a and 60b detect, for example, the temperature of the transformer 59 in the conversion unit 44, the housing 5, the temperature of the solid light emitting element 32 constituting the light emitting unit 50, the temperature of the capacitor 53 (particularly, a smoothing capacitor), etc. 5, the thermocouples 60a and 60b are arranged to detect the temperature of the transformer 59 and the casing 5, respectively, but the present invention is not limited to this. Also, the number is not limited to two). The temperature values detected by the thermocouples 60a and 60b are sent to the controller unit 68, and are stored and held in an internal memory (not shown) provided in the controller unit 68.

  The setting unit 49 includes a controller unit 68 and sets a reference operating point for the light emitting unit 50. Here, the controller unit 68 is connected to an external signal receiver and an external input switch (not shown) outside the lighting device 1.

  For example, if the external signal receiver (not shown) is an infrared receiver, the reference operating point of the light emitting unit 50 can be easily controlled by infrared communication. By doing in this way, the light emission part 50 can be light-controlled easily.

  In addition, information related to the reference operating point of the light emitting unit 50 may be input by an external input switch (not shown) outside the lighting device 1. Also by doing in this way, the light emission part 50 can be light-modulated easily.

  In addition, information such as a reference operating point to be used for dimming the light emitting unit 50 may be stored in advance in an internal memory (not shown) of the controller unit 68.

  The instruction unit 47 includes a controller unit 68. The instruction unit 47 determines a target operation point based on the reference operation point set by the setting unit 49 and the operation point detected by the detection unit 46.

  The selection unit 48 includes drivers 55 and 57 and a controller unit 68.

  The controller unit 68 instructs the operations of the drivers 55 and 57 to realize the target operating point determined by the instruction unit 47. The drivers 55 and 57 control the operation of the FETs 56 and 58 based on the operation instruction from the controller unit 68.

  The power supply device 2 further includes a power supply unit 101 that converts alternating current into direct current and supplies the converted direct current to the controller unit 68. Here, the power supply unit 101 is insulated from the circuit elements of the power supply device 2 that supplies direct current to the light emitting unit 50.

  The power supply unit 101 includes a transformer 66 and a diode 67, and converts the alternating current supplied from the commercial power supply 42 into direct current using the transformer 66 and the diode 67 and supplies direct current to the controller unit 68. Here, the transformer 59 and the transformer 66 are separate individuals and are independent of each other.

  In addition, an operation instruction from the controller unit 68 to the drivers 55 and 57 that realize the target operation point determined by the instruction unit 47 is performed via a signal line that connects the controller unit 68 and the drivers 55 and 57.

  Here, the signal line connecting the controller unit 68 and the drivers 55 and 57 is also electrically insulated by using, for example, a photocoupler in the middle thereof.

  Therefore, the controller unit 68 and the conversion unit 44 are configured to be electrically insulated. For this reason, for example, noise generated in the conversion unit 44 or the like can be prevented from entering the controller unit 68. This prevents the controller unit 68 from malfunctioning, and improves the safety of the power supply device 2 itself. That is, the reliability of the lighting device 1 is increased.

  Here, regarding the DC power supply in the backlight device described in Patent Document 2, the microcomputer corresponding to the controller unit 68 of the power supply device is not electrically insulated from the transistors corresponding to the FETs 56 and 58 of the present invention. Therefore, there is a risk of malfunction due to noise or the like.

  However, as described above, in the lighting device 1 of the present invention, the controller unit 68 and the FETs 56 and 58 are electrically insulated (the signal lines connecting the controller unit 68 and the drivers 55 and 57 are electrically insulated). The risk of malfunction due to noise is reduced, and the reliability of the lighting device 1 is increased.

  The transformer 59 in the conversion unit 44 not only has a function of converting voltage and current values into desired values, but also includes a pair of terminals A and A ′ which are input terminal pairs in the conversion unit 44, and It has a function of electrically insulating the output terminal pair B and B ′. As a result, the light emitting unit 50 connected to the power supply device 2 can be protected from noise from the commercial power supply 42.

  Furthermore, the transformer 59 in the conversion unit 44 uses a center tap on the primary coil side.

  Here, a part of the transformer 59 shown in FIG. 5 is between one end of the primary coil of the transformer 59 and the center tap, and b part of the transformer 59 is between the other end of the primary coil of the transformer 59 and the center tap. It is said.

  The transformer 59 is configured such that the directions of magnetic flux generated in the part a and the part b are reversed. Therefore, by alternately operating the a part and the b part, it is possible to prevent the transformer 59 from being magnetized unnecessarily. This leads to an improvement in durability of the power supply device 2, so that the reliability of the power supply device 2 is increased.

  Here, the transformer used for the DC power supply in the backlight device described in Patent Document 2 is not a type with a center tap. This is presumed to be because long-term stability is not required based on the life characteristics of the lamp that is a load of the backlight device.

  On the other hand, the illuminating device 1 of the present invention is a device premised on application to an illuminating device using a high power LED as a solid-state light emitting element as described above. LEDs have a very long life and can be used continuously for more than 10 years depending on the method of use.

  In view of such a situation, the power supply device 2 of the present invention that constitutes an illumination device using an LED is required to be designed to be used stably for more than 10 years. Therefore, it is preferable to use a transformer with a center tap that can realize stable operation over a long period of time as the transformer 59 in the conversion unit 44.

  In the power supply device 2, the conversion unit 44 is controlled by the controller unit 68, the driver 55, and the driver 57.

  Here, the controller unit 68 controls the duty ratio of the FETs 56 and 58 via the photocouplers and drivers 55 and 57. Specifically, a full-wave rectified waveform is formed from a full-wave rectified waveform without converting the full-wave rectified waveform input from the terminal pair A and A ′, which is an input terminal pair in the conversion unit 44, into a direct current. Control that directly generates a desired pulse waveform is realized.

  As a result, it becomes unnecessary to use a smoothing capacitor, so that the volume of the power supply device 2 can be greatly reduced and the reliability can be improved. Hereinafter, the reason will be described in detail.

  In the constant current DC power source described in Patent Document 3, a full voltage rectified waveform is once smoothed and a pulse voltage waveform having desired characteristics is obtained. In order to perform the smoothing, a capacitor corresponding to the capacitor 53 is a smoothing capacitor. As the smoothing capacitor, an electrolytic capacitor having a large capacity is used. This electrolytic capacitor generally has a problem that the volume is large and the apparatus is enlarged. Furthermore, there is a problem that the capacity easily changes due to the influence of the ambient temperature. Moreover, the electrolytic capacitor has a short life and has a problem of stability.

  Further, in the DC power supply in the backlight device described in Patent Document 2, although it is not necessary to use an electrolytic capacitor, there is a problem in terms of safety and stability as described above.

  However, the power supply device 2 according to the present invention solves all of these problems and is suitable for a lighting device using LEDs.

  In the power supply device 2, even when the capacitor 53 is a smoothing capacitor, sufficient parts are selected, a long-life product is applied, information on the temperature is detected, and the duty ratio is controlled based on the detected information. By doing so, it has been confirmed that the life of the power supply device 2 can be realized at a high level.

Next, operation | movement of the illuminating device 1 is demonstrated using figures.
FIG. 7 is a flowchart showing the operation of the lighting device 1.

  First, in S72, the commercial power source 42 is turned on to the power source device 2 of the lighting device 1 and power feeding is started. Then, the controller unit 68 starts operation. Here, immediately after the commercial power source 42 is turned on, the operation of the controller unit 68 is started, but the conversion unit 44 (FETs 56 and 58, transformer 59, terminal pair A and A ′, terminal pair B and B ′). ) Is not supplied with power, and the conversion unit 44 is not activated. The reason for taking this method is to increase the safety of the lighting device 1. By starting the controller unit 68 first, if an abnormality occurs in each part (the rectifying unit 43, etc.), the commercial power source 42, or the light emitting unit 50 (the light source unit 3) in the power supply device 2, the operation is immediately performed. It is because it can be stopped.

  Another reason for adopting this method is that it is necessary to detect the frequency of the commercial power source 42 before the converter 44 is driven. Even in Japan, the frequency of the commercial power source 42 is 50 Hz in the eastern Japan region and 60 Hz in the west Japan region. In order to perform the desired control as described above using the controller unit 68, it is necessary to detect the frequency of the commercial power source 42.

  Next, in S73 of FIG. 7, the instruction unit 47 reads the reference operation point from the setting unit 49 as the target operation point.

  Here, the operating point is a value obtained by the product of the current value flowing through the light emitting unit 50 detected by the resistor 64 and the forward voltage value applied to the light emitting unit 50 detected by the resistor 65. The unit of the operating point is watt [W], which is equivalent to electric power. The forward voltage of the light emitting unit 50 is determined by the characteristics and the number of solid state light emitting elements included in the light emitting unit 50. Further, the forward voltage also changes depending on the temperature of the light emitting unit 50 itself having a solid light emitting element.

  Further, since the light emitting unit 50 having a solid light emitting element is a current control element, the light emission intensity of the light emitting unit 50 is determined depending on the magnitude of the current flowing therethrough. In other words, the light emission intensity of the light emitting unit 50 can be freely changed, that is, dimmed by setting the magnitude of the current flowing through the light emitting unit 50.

  Here, the reference operating point is determined from a forward voltage corresponding to the characteristics of the light emitting unit 50 to be used and a current value corresponding to the light emission intensity required in the light emitting unit 50. Therefore, by changing the reference operating point of the light emitting unit 50, the light emission intensity of the light emitting unit 50 at that time can be increased (lightened) or weakened (darkened).

  Here, FIG. 8 is a diagram for explaining changing the light emission intensity by changing the setting of the reference operating point of the light emitting unit 50. FIG. 8A shows a reference operating point indicating the light emission intensity at that time (initial). In order to make the light emission intensity of the initial light emitting unit 50 stronger (brighter), the reference operation point is moved and set as shown in FIG. Conversely, when it is desired to make the light emission intensity of the initial light emitting unit 50 weaker (darker), it may be set by moving as shown in FIG.

  The reference operating point may be set by an input from an external input switch (not shown) connected to the setting unit 49, or an input from an external signal receiving device (not shown) connected to the setting unit 49. May be performed. In this way, the setting of the reference operating point can be changed from outside, that is, the light emitting unit 50 can be dimmed from outside.

  Next, in S74 of FIG. 7, the selection unit 48 determines and calculates a duty ratio for realizing the target operating point. That is, the selection unit 48 determines the duty ratio of the voltage input to the primary side of the transformer 59 in the conversion unit 44 for realizing the target operating point.

  Next, in S <b> 75 of FIG. 7, the selection unit 48 creates a signal (control signal) for controlling the conversion unit 44 in the controller unit 68 so that the conversion unit 44 realizes control of the determined duty ratio.

  Here, the voltage input to the converter 44 is a full-wave rectified waveform as shown in FIG. It is necessary to generate electric power necessary to realize the target operating point using the voltage of the full-wave rectified waveform shown in FIG. Therefore, the following method is used.

  First, as shown in FIG. 6A, the zero cross point of the AC voltage of the commercial power source 42 is detected. Here, the detection of the zero cross point is performed every time the AC voltage waveform supplied from the commercial power source 42 crosses the zero cross point. This is because the AC voltage waveform supplied from the commercial power supply 42 may cause subtle frequency fluctuations, and the subtle frequency fluctuations deteriorate the control accuracy in the converter 44. In order to prevent deterioration of control accuracy in the converter 44, the zero cross point is detected every time the AC voltage waveform crosses the zero cross point.

  Next, as shown in FIG. 6B, the full-wave rectified waveform is divided at predetermined time intervals using the zero cross point as a reference point. Here, the time interval is set so that the interval from one reference point to the next reference point is divided into four sections, but the number is not limited to this. Actually, the time interval is set to a range of about 2 [μs] to 20 [μs] in consideration of the smoothness of the smoothing unit 45 and the like. In the experiments by the inventors, 4 [μs] was optimal.

  Next, necessary power is realized in each section. Here, power is a product of voltage and current as a matter of course. For this reason, the controller unit 68 generates a signal for controlling the converter 44 so as to change the duty ratio, as shown in FIGS. 9A and 9B, so that the necessary power can be obtained in all the sections.

  Here, FIG. 9 is a diagram for explaining that a control signal for controlling the duty ratio of the conversion unit 44 is created by the controller unit 68. FIG. 9 is created based on the output waveform of the diode bridge 54 that rectifies the alternating current of FIG. 6 as described above.

  Moreover, the transformer 59 has a center tap on the primary coil side. Therefore, it is necessary to generate two control signals for the a part and the b part on the primary coil side of the transformer 59 as shown in FIGS. 9A and 9B.

  Here, the control signal for part a on the primary coil side of the transformer 59 and the control signal for part b on the primary coil side of the transformer 59 are simultaneously Hi (that is, the FETs 56 and 58 are simultaneously operated). Must not. If this happens, the transformer 59 will break down.

  Therefore, the control signal for the a part on the primary coil side of the transformer 59 and the control signal for the b part on the primary coil side of the transformer 59 both exceed 50 [%] within the set interval, and Hi Must not be. Furthermore, in view of safety, the inventors made it not to become Hi beyond 49 [%] in the set section.

  Here, since the frequency of the commercial power source 42 is detected in S72 of FIG. 7, after detecting the zero cross point, the time at which the next zero cross point is detected is calculated in advance using this as the reference point. Is also desirable. In this way, the control signal can be forced to Lo before the next zero cross point is detected, and the operation of the conversion unit 44 can be stopped. This leads to prevention of malfunction of the power supply device 2, so that the reliability of the power supply device 2 (illumination device 1) can be improved.

  Further, when the power required to be generated by the conversion unit 44 for realizing the target operating point calculated in S74 of FIG. 7 is very small, the time during which the control signal becomes Hi becomes very small. Therefore, it is difficult to generate power within the set section.

  For example, when the power supplied to the lighting device 1 is about several W immediately after the lighting device 1 starts lighting, the commercial power source 42 is used to generate the power of about several W. The duty ratio is controlled so that the ON time during which the voltage from the signal is passed through the converter 44 is very small. The ON time during which the voltage from the commercial power source 42 in the duty ratio control is passed through the converter 44 correlates with the time when the control signal becomes Hi.

  A countermeasure for increasing the time during which the control signal becomes Hi is performed as follows. Here, it is assumed that the time interval is set so that the interval from one reference point to the next reference point is divided into four sections.

  First, in the first section from the reference point (0 cross point), a control signal is generated so as to correspond to power equivalent to twice the necessary power to be generated by the conversion unit 44 (for the a section and b). For both departments, a control signal is generated). As a result, it is possible to increase the time during which the control signal in this section becomes Hi. On the other hand, in the second section from the reference point, the control signal is maintained at Lo (the control signal is maintained at Lo for both the part a and the part b).

  Second, in the third period from the reference point, the control signal is maintained at Lo (the control signal is maintained at Lo for both the a part and the b part). In the fourth section from the reference point, a control signal is generated so as to correspond to power corresponding to twice the necessary power to be generated by the conversion unit 44 (a control signal is generated for both the part a and the part b). . As a result, it is possible to increase the time during which the control signal in this section becomes Hi.

  Thereafter, the first and second are repeated alternately. By doing in this way, it is possible to perform control without impairing the stability of the operation of the power supply device 2 even when the target operating point is realized after the power generated by the conversion unit 44 is very small.

  Here, the above is performed in four sections, but the number of sections is not limited to this. What is necessary is just to change suitably in the range which does not change the intent of the said method according to the number of areas.

  In addition, it is desirable to use the a part and the b part of the transformer 59 in the conversion unit 44 as evenly as possible. That is, when only one of them is used, the transformer 59 is magnetized unnecessarily. In order to prevent this, it is necessary to use part a and part b as evenly as possible.

  Next, drive signals for operating the FETs 56 and 58 are generated by the drivers 55 and 57 in S76 of FIG. This is created based on the control signal created in S75.

  At this time, the drivers 55 and 57 may check the contents of the control signal. Specifically, it is checked whether the control signal for part a and the control signal for part b are simultaneously Hi. If it is Hi at the same time, the drive signal is generated after changing the control signal for part b to Lo. The generated pulse waveform is transformed (boosted) by the transformer 59.

  Next, in S77 of FIG. 7, the FETs 56 and 58 are driven based on the control signals (FIGS. 9A and 9B) created in S75, and pulse waveforms (FIGS. 10A and 10) are driven. (B)) is generated.

  Next, in S78 of FIG. 7, the smoothing unit 45 smoothes and outputs the voltage of the input pulse waveform.

  Next, in S <b> 79 of FIG. 7, the detection unit 46 detects the actual operating point of the light emitting unit 50, that is, the product value of the actual current value and voltage value of the light emitting unit 50. The operating point of the light emitting unit 50 varies depending on the ambient temperature, a temperature change due to its own heat generation, and the like. Therefore, it is necessary to check the actual operating point and correct it. Further, the temperature of the transformer 59, the housing 5 and the like are also measured.

  Next, in S80 of FIG. 7, it is confirmed whether or not the reference operating point has been changed. This corresponds to, for example, whether the user using the lighting device 1 has changed the light emission intensity of the light emitting unit 50. If the reference operating point has been changed (YES in S80 of FIG. 7), the process proceeds to S73. If the reference operating point has not been changed (NO in S80 of FIG. 7), the process proceeds to S81.

  Here, it is desirable that the period required for detection when the detection unit 46 is the operating point of the light emitting unit 50 is 1 [ms] to 500 [ms]. This is because the operating point of the light emitting unit 50 does not change sharply in time, and therefore it is not necessary to make this cycle fast. That is, since real-time property is not necessary, detection may be performed at an appropriate cycle or time interval. Thereby, the microcomputer (not shown) mounted on the controller unit 68 has a special effect that can be made relatively inexpensive and compact. In the inventors' tests, it was optimal to set this period to 150 [ms].

  Next, in S81 of FIG. 7, the instruction unit 47 compares the operating point detected in S79 with the reference operating point, and sets a target operating point based on the result.

  FIG. 11 is a diagram illustrating that the target operating point is reset when the actually detected operating point of the light emitting unit 50 is out of the predetermined operating range from the reference operating point.

  As shown in FIG. 11 (a), this shows a response when the operating point detected in S79 fluctuates to the upper left in the figure, that is, when it deviates outside the upper limit range of the predetermined operating range. This corresponds to a case where the forward voltage of the light emitting unit 50 decreases and the current flowing in the forward voltage increases accordingly. In this case, the light emitting unit 50 emits light that is stronger (brighter) than the desired light emission intensity. For this reason, a control operation point is determined and set as a new target operation point. By doing so, a predetermined operating range (here, when the current value of the current flowing through the light emitting unit 50 based on the reference operating point is 100, a range of 95 to 105, that is, a range of ± 5% is set as the predetermined operating range. The operating point will be within.

  Note that the predetermined operation range does not have to be within a range of ± 5%, but may be as wide as a range of ± 10%. However, the wider it is, the greater the change in the light emission intensity of the light emitting unit 50, which gives a sense of discomfort to the surrounding people, so it is necessary to set an appropriate range. In the tests by the inventors, this value is adopted because there is no sense of incongruity within the range of ± 5%.

  As shown in FIG. 11 (b), when the operating point detected in S79 fluctuates to the lower right in the figure, that is, when the operating point is outside the lower limit range of the predetermined operating range, As in the case, a control operation point is determined and set as a target operation point.

  If the operating point detected in S78 is within the predetermined operating range, it is used as a new target operating point as it is.

  Next, in S82 of FIG. 7, the instruction unit 47 checks whether a stop signal is input from an external input switch (not shown) or the like, and stops the operation of the power supply device 2 if the stop signal is input. (In the case of YES in S82). This corresponds to, for example, a user using the lighting device 1 turning off the light emitting unit 50 of the lighting device 1, that is, stopping the power supply to the power supply device 2 of the lighting device 1. At this time, the conversion unit 44 stops operation for a predetermined time before the controller unit 68. In other words, the controller unit 68 ends the instruction to the conversion unit 44 within the time. Here, the predetermined time is desirably about 0.2 [s] to 1 [s].

  The reason for taking such a method is to increase the safety of the power supply device 2 in the lighting device 1.

  In S82 of FIG. 7, the instructing unit 47 confirms whether a stop signal is input from an external input switch (not shown) or the like. If no stop signal is input (NO in S82), the process returns to S74. The above operation is repeated.

  In addition, the temperature of the transformer 59 or the casing 5 may be adjusted by changing the duty ratio based on the temperature of the transformer 59 or the casing 5 detected by the thermocouples 60a and 60b in the detection unit 46. . Or you may adjust the temperature of the solid light emitting element 32 by changing a duty ratio based on the temperature of the solid light emitting element 32 which comprises the light emission part 50. FIG. The procedure will be described below.

  FIG. 12 is a flowchart showing a procedure for changing (controlling) the duty ratio based on the temperature detected by the detection unit 46. This operation may be performed, for example, between S74 and S75 in FIG.

  First, in S121, it is confirmed whether or not the temperature (T) detected by the detection unit 46 exceeds a predetermined temperature threshold (Tth).

  Specifically, the temperature (T) of the transformer 59, the casing 5, the capacitor 53 (especially when a smoothing capacitor is used), the solid light emitting element 32, and the like detected by the thermocouples 60a and 60b in the detection unit 46 is stable. It is confirmed whether or not a predetermined temperature threshold is exceeded as an upper limit value that can be operated.

  When the temperature (T) detected by the detection unit 46 is higher than a predetermined temperature threshold value (Tth) (YES in S121), the ON time of the duty ratio in the conversion unit 44 is decreased in S122. (For example, 10%). That is, the duty ratio is changed.

  As a result, it is possible to reduce the load on the transformer 59, the casing 5, the capacitor 53 (especially when a smoothing capacitor is used), the solid light emitting element 32, and the like. It can be driven at a temperature lower than the threshold value (Tth).

  If the temperature (T) detected by the detection unit 46 is lower than a predetermined temperature threshold value (Tth) (NO in S121), there is no need to change the duty ratio, and the operation is performed there. Is temporarily terminated.

  In this way, by detecting the temperature (T) by the detection unit 46 at a predetermined cycle, the lighting device 1 can be driven in a temperature range where safe operation is performed.

  Here, the reason for changing (controlling) the duty ratio based on the temperature detected by the detecting unit 46 as described above is as follows. First, the transformer 59, the housing 5, the capacitor 53 when the smoothing capacitor is used, and the like. When the temperature becomes abnormally high, there is a possibility that the power supply device 2 may fail (including long-term deterioration of life characteristics). Therefore, it is necessary to lower the temperature of the transformer 59 and the like.

  This is because the load of the voltage from the commercial power source 42 applied to the transformer 59 and the like can be reduced by changing the duty ratio to be low, so that the temperature of the transformer 59 and the like can be lowered.

  For example, when the temperature of the transformer 59 is detected by the thermocouple 60a and the detected temperature value of the transformer 59 exceeds a reference value (for example, 80 degrees), the reference operating point is lowered to reduce the transformer. Reduce 59 temperature.

  Note that the operation of the power supply device 2 may be stopped when the transformer 59 becomes abnormally hot. However, when the cause of the abnormally high temperature of the transformer 59 is a disaster such as a fire, if the operation of the power supply device 2 is stopped, the light emission from the light emitting unit 50 is stopped and the surrounding area becomes completely dark. End up. This can panic people around you. Therefore, it is preferable to continue the light emission of the light emitting unit 50 by operating the power supply device 2 at a low reference operating point even when the transformer 59 becomes abnormally high as in the above example.

  Further, when the capacitor 53 is configured as a smoothing capacitor, when the detected temperature value of the capacitor 53 exceeds a reference value (for example, 80 degrees), the temperature of the capacitor 53 is decreased by lowering the reference operating point. Lower.

  It is conceivable to use an electrolytic capacitor as the smoothing capacitor, but the above control is performed because it is necessary to reduce the load and prevent the temperature from increasing in order to exhibit its life characteristics.

  Further, when it is detected that the temperature value of the solid light emitting element 32 exceeds a reference value (for example, 90 degrees), the temperature of the solid light emitting element 32 is lowered by changing the duty ratio to be low. As a result, the burden on the solid state light emitting device 32 can be reduced, the temperature can be lowered, and deterioration of its characteristics can be prevented.

  FIG. 13 is a flowchart for explaining in detail the operation of determining the duty ratio of the selection unit 48 according to S74 in FIG.

  First, in S131, the selection unit 48 calculates a duty ratio for the conversion unit 44 in order to realize the target operating point.

  Next, in S132, the selection unit 48 controls the conversion unit 44 in order to realize the duty ratio calculated in S131.

  Next, in S <b> 133, the selection unit 48 calculates an operating point based on the current flowing through the light emitting unit 50 detected by the detection unit 46 and the forward voltage of the light emitting unit 50.

  Next, in S134, the selection unit 48 confirms whether or not the operating point obtained in S133 matches the target operating point.

  When the operation point obtained in S133 matches the reference operation point (in the case of YES in S134), the selection unit 48 determines the current value detected in the detection unit 46, the forward voltage value, and The information on the operating point obtained based on the above is stored in the internal memory of the controller unit 68 as history information and held. Thereby, the duty ratio is determined.

  If the calculated operation point and the target operation point do not match (NO in S134), the selection unit 48 changes the determined duty ratio for the conversion unit 44 (S136). The process of S132 is executed again. Here, for example, the changed duty ratio is 10%, for example.

  Here, the LED used for the light emitting unit 50 of the lighting device 1 is very small compared to a conventional fluorescent lamp, and the size, shape, etc. of the light emitting unit 50 can be arbitrarily designed for each application by arbitrarily selecting the number. can do. Therefore, the power supply device 2 in the lighting device 1 is better as it is smaller, and further miniaturization is required.

  Therefore, a method for reducing the size of the housing 5 of the power supply device 2 by optimally arranging the circuit elements constituting the power supply device 2 and mounting the circuit elements at a high density on the substrate will be described below.

  As shown in FIG. 1, the power supply device 2 includes a housing 5 and a power feeding cable 4. As shown in FIG. 2, the power supply device 2 further houses a substrate 21 on which circuit elements constituting the power supply device 2 are mounted inside the housing 5.

  FIG. 14A is a diagram illustrating a schematic structure of the substrate 21 constituting the power supply device 2. The board 21 housed in the casing 5 of the power supply device 2 is a board before mounting on which circuit elements are mounted, and includes a main board 121 shown in FIG. 14A (a), a sub board A122 shown in FIG. 14A (b), and And the sub-substrate B123. Here, it goes without saying that the number of sub-boards is not limited to this and may be set freely.

  The substrate 21 (the main substrate 121, the sub substrate A122, and the sub substrate B123) is a single-sided mounting type substrate.

  The main board 121 has a rectangular shape. FIG. 14A (a) is a view as seen from the direction of the mounting surface of the main board 121. FIG. Similarly, the sub-substrate A122 and the sub-substrate B123 have a rectangular shape. FIG. 14A (b) is a view as seen from the direction of the mounting surface of the main board 121. FIG.

  Here, as shown in FIG. 14B, the winding element 163 (the winding element 163 indicates a transformer 59, a booster coil (not shown), etc.) is wound by winding a conductor (not shown) around the core 163a. A portion where the winding is performed is defined as a winding portion 163b.

  In addition, the width t9 of the core 163a (that is, the width along the central axis of the winding element 163) t9 is generally the largest value among the circuit elements constituting the power supply device 2 (the inventors When the power supply device 131 was prototyped with a maximum output power of 100 W, the width t9 of the core 163a of the winding element 163 was the largest value among the circuit elements constituting the power supply device 2).

  Therefore, the arrangement of the winding element 163 on the main board 121 is a key point in determining the size of the power supply device 2. Therefore, the inventors arranged the winding element 163 so that the central axis of the winding element 163 is at an angle α with respect to the long side direction of the main board 121 as shown in FIG. 15A.

  In this way, the width t2 of the main board 121 in the short side direction can be made smaller than the width t9 of the core 163a (at the same time, the widths of the sub board A122 and the sub board B123 in the short side direction are also t2. Can be).

  Here, the angle α is preferably in the range of 30 to 60 degrees, more preferably in the range of 40 to 50 degrees.

  For this reason, if the angle α is 60 degrees or more, it is necessary to increase the width t2 of the main substrate 121 in the short side direction. Conversely, if the angle α is 30 degrees or less. This is because it is necessary to increase the width of the main substrate 121 in the long side direction.

  In particular, when a plurality of winding elements 163 are required, it is not preferable to set the angle α to 30 degrees or less. In this embodiment, as described above, the winding element 163 corresponds to the transformer 59, that is, only one winding element 163 exists. For example, a power factor correction circuit (not shown) Is added to the power supply device 2, a step-up coil (not shown) is required. The step-up coil (not shown) is also a winding element 163. In this case, two winding elements 163 are present in the circuit elements constituting the power supply device 2. In this case, if the angle α is 30 degrees or less, it is necessary to cumulatively increase the width of the main substrate 121 in the long side direction.

  FIG. 15B is a diagram when various circuit elements are mounted on the substrate 21 constituting the power supply device 2. In FIG. 15B, circuit elements constituting the power supply device 2 in the lighting apparatus 1 shown in FIG. 2, such as the winding element 163, are mounted on the main board 121, the sub board A122, and the sub board B123.

  FIG. 15B (a) shows the various circuit elements constituting the power supply device 2 in the hatched portion, and shows the main board 121 on which the various circuit elements constituting the power supply device 2 are mounted.

  FIG. 15B (b) shows various circuit elements constituting the power supply device 2 in the hatched portion, and shows the sub-substrate A122 and the sub-substrate B123 on which the various circuit elements constituting the power supply device 2 are mounted.

  FIG. 16 is a diagram showing that the main board 121, the sub board A122, and the sub board B123 are arranged facing each other on the mounting surface. 16 shows a mounting surface of the main board 121 on which the various circuit elements shown in FIG. 15B (a) are mounted, and a mounting surface of the sub board A122 and the sub board B123 on which the various circuit elements shown in FIG. 15B (b) are mounted. Are arranged so as to face each other along the long side direction. Here, what is important is that when the sub-board A122 and the sub-board B123 are mounted so that the mounting surfaces of the main board 121 face each other as shown in FIG. It is to avoid interference.

  Therefore, the distance between the mounting surface of the main substrate 121 and the mounting surfaces of the sub substrate A122 and the sub substrate B123 is the highest among the various circuit elements mounted on the main substrate 121, the sub substrate A122, and the sub substrate B123. Is substantially the same as a high circuit element (here, winding element 163).

  Further, when the sub-board A122 and the sub-board B123 are mounted on the mounting surface of the main board 121 so that the mounting surfaces face each other, the sub-board A122 and the sub-board B123 are completely mounted without protruding from the main board 121. It is important to do so.

  As described above, the internal height of the power supply device 2 is approximately equal to the highest circuit element (here, the winding element 163) constituting the power supply device 2, and the length in the short side direction is set to be the same. The power supply device 2 can be made shorter than the widest circuit element (here, the winding element 163) constituting the power supply device 2.

  As for the power supply device 2, the housing | casing 5 which equips these inside is an external shape. Therefore, it can be made as large as a chopstick box. The inventors have made a prototype of the power supply device 2 with a maximum output power of 100 W, and have confirmed that the size can be 28 mm × 28 mm × 220 mm or less. Therefore, it has been confirmed that a sufficient size reduction can be realized.

  Here, as described above, the power supply device 2 is premised on application to a lighting device using a solid-state light emitting element (here, LED). Each LED is very small, and therefore, a small and highly design lighting device that cannot be realized by a conventional lighting device using a fluorescent lamp or the like can be realized by using the LED. Therefore, it is necessary to make the power supply device 2 as small as possible and to facilitate the incorporation of the lighting device 1. This is achieved by making the volume ratio of the power supply device 2 constituting the illumination device 1 to the illumination device 1 very small.

  Incidentally, as described above, the DC power supply in the backlight device described in Patent Document 2 is not specified for downsizing. Therefore, application to an illumination device using LEDs cannot be realized with a DC power source in a backlight device described in Patent Document 2.

  The power supply device 2 in the present invention is assumed to be applied to a solid state light emitting device (LED). The LED is a small element and is therefore suitable for constructing a lighting device that is freely and sufficiently small. However, when the power supply device that is a drive source for driving the light emitting unit 50 using LEDs is large, the characteristics are not sufficiently exhibited.

  For example, the direct current power source in the backlight device described in Patent Document 2 is not considered in terms of its size. Therefore, since the power supply device portion is not sufficiently miniaturized, the size of the power supply device becomes a bottleneck, and the small illumination device 1 using LEDs cannot be realized.

  On the other hand, the power supply device 2 according to the present invention is very compact because circuit elements necessary for the configuration of the power supply device 2 are densified and mounted, so that a compact lighting device 1 using LEDs can be realized. Is preferred. Therefore, I think that its industrial value is great.

  The power supply device 2 shown in FIG. 1 shows a state in which the size is determined based on the above design, various circuit elements are mounted, and a high-density mounting board is housed in the housing 5. 2 shows the main board 121, the sub board A 122, and the sub board B 123 (indicated as the board 21 in FIG. 2) constituting the power supply device 2, and the sub board A 122 and the sub board on the mounting surface of the main board 121. A state in which the mounting surfaces of B123 are placed so as to face each other and stored in the housing 5 is shown.

  Here, the reason why the housing 5 is made of a material having high thermal conductivity is from the viewpoint of heat dissipation. The power supply device 2 manufactured by the inventors has a maximum input power of 105 W, a maximum output power of 100 W, and an efficiency of about 95%. Therefore, 5 W becomes a loss, and this loss becomes heat.

  As described above, the power supply device 2 is premised on application to an illumination device using a solid light emitting element (LED). In order to use the lighting device 1 using LEDs stably for a long period of time, for example, 10 years or more, the lighting device 1 is appropriately supplied with heat generated as a loss in the power supply device 2 and the light emitting unit 50 (light source unit 3). Need to be processed. By appropriately treating the heat, it is possible to prevent deterioration of the circuit elements in the power supply device 2 and to ensure long-term stability.

  Therefore, it is necessary to improve the heat dissipation characteristics of the power supply device 2 by configuring the housing 5 with a material having high thermal conductivity.

  Moreover, when the housing | casing 5 is comprised with aluminum, it is desirable to carry out an alumite process. By doing in this way, since the surface area of the housing | casing 5 can be increased, the heat dissipation of the power supply device 2 can be improved.

  Further, the housing 5 is a member having a high thermal conductivity such as metal and having a large surface area, that is, a member having a high heat dissipation effect (not shown, for example, the housing portion 31, even a metal panel having a large surface area, etc. Any other members may be used as long as the above conditions are satisfied. By comprising in this way, the thermal radiation using the housing | casing 5 can be performed more efficiently.

  Here, the surface (corresponding to the metal plane of the present invention) constituting the housing 5 to be in close contact with the member (not shown) is a surface along the longitudinal direction of the housing 5 among the four surfaces. It is preferable that it is one side. By doing in this way, a surface with a large area can be utilized in the surface which comprises the housing | casing 5, and the thermal radiation effect can be improved.

  Moreover, it is preferable to comprise the surface which comprises the housing | casing 5 closely_contact | adhered with this said member (not shown) as a plane which has the predetermined thickness t1 at least. By doing in this way, it can prevent that the surface which comprises the said housing | casing 5 is distorted. In addition, according to the experiments by the inventors, the predetermined thickness t1 may be 1 mm or more in the case where the surface constituting the housing 5 is made of aluminum, and a better result is 2 mm or more. Is obtained.

  Further, the surface area of the member (not shown) needs to be larger than the surface area of the surface constituting the housing 5 to be in close contact with the member (not shown). As a result, heat can be radiated over a wide area, and the heat dissipation effect is enhanced.

  Further, the portion of the member (not shown) where the surfaces constituting the housing 5 are in close contact with each other needs to be a flat surface. By doing in this way, adhesiveness can be improved.

  Moreover, in order to maintain both adhesiveness, it is also preferable to fix the surface which comprises the housing | casing 5, and the said member (not shown) in the state arrange | positioned closely. For example, a fixing through-hole (not shown) may be provided in the housing 5 and used to fix it to the member (not shown) using a screw (not shown) or the like.

  Further, the adhesiveness may be improved by sandwiching an adhesive or a double-sided tape without a base material between the surface constituting the housing 5 and the above-described member (not shown) and pressing it. .

  In addition, the power supply device 2 performs voltage boosting in the transformer 59. Thereby, the improvement of the power factor of the illuminating device 1 is aimed at. Improving the power factor has advantages such as downsizing of electrical equipment.

  Further, an insulating sheet (between the non-mounting surface of the main substrate 121 and the housing 5, between the non-mounting surface of the sub-board A 122 and the housing 5, and between the non-mounting surface of the sub-board B and the housing 5 ( It is also preferable to interpose (for example, an insulating sheet (not shown) is affixed to the surface of the housing 5 facing the non-mounting surface). In this way, even if an impact is applied to the power supply device 2, there is an effect that the risk of failure of the power supply device 2 can be further reduced (the risk of occurrence of an electrical short circuit or the like is further increased). To be reduced).

  As described above, the power supply device 2 in the present invention is suitable for application to the lighting device 1 using a solid light emitting element (LED).

  The LED portion of the lighting device 1 using LEDs can be maintenance-free for more than 10 years depending on the method of use. Therefore, it is desirable that the lighting device 1 can be used stably for more than 10 years. As described above, the lighting device 1 according to the present invention is designed to have high stability and safety. Therefore, depending on the method of use, it can be said that the reliability that can realize maintenance-free for a long period of time, for example, 10 years or more, is secured. Moreover, the compact power supply device 2 can be realized by optimally arranging the circuit elements constituting the power supply device 2 and storing the high-density mounted board in the housing 5 with a minimum size. . Therefore, it is suitable for realizing a small-sized and free-form illumination device, which is another feature of the LED.

  Further, an insulating resin may be sealed between the high-density mounting substrates disposed opposite to each other and housed in the housing 5 of the power supply device 2. Thereby, the insulation between circuit elements can be improved and the reliability of the power supply device 2 can be improved.

  As mentioned above, the illuminating device 1 in this invention can be driven by the light emission part 50 which uses a solid light emitting element (LED), and the power supply device 2 optimal for LED illumination use, and can implement | achieve efficient illumination.

(Embodiment 2)
The power supply device 131 according to the second embodiment is a power supply device that can be applied to the lighting device 1 instead of the power supply device 2 shown in the first embodiment.

  The power supply device 131 is a power supply device that can be miniaturized in the same manner as the power supply device 2. The power supply device 131 is different from the power supply device 2 only in the structure, and has the same function, circuit configuration, and the like. Therefore, the description about a function, a circuit structure, etc. is abbreviate | omitted, and only the part concerning a structure is demonstrated below.

  FIG. 17 is a perspective view showing the external appearance of the power supply device 131. 18 is a plan view of the power supply device 131 viewed from the direction C in FIG. FIG. 19 is a cross-sectional view showing the structure of the power supply device 131 on the D1-D2 plane of FIG. FIG. 20 is a cross-sectional view showing the structure of the power supply device 131 on the E1-E2 plane of FIG.

  18, 19, 20, and 22, the short side direction of the plate 152 is the axis x, the short side direction of the substrate 155 is the axis y, the plate 152, and the long side of the substrate 155 as described in FIGS. Let the direction be the axis z.

  The casing 151 has a columnar shape (here, a quadrangular columnar shape, but may be a columnar shape or the like), and has a hollow structure 158. Inside the hollow structure 158, circuit elements constituting the power supply device 131 are provided.

  Here, in the following, among the circuit elements constituting the power supply device 131, the diode bridge 54, the FETs 56, 58, and the like are elements that generate a large amount of heat. Further, the transformer 59 and the like are used as the winding element 163. Furthermore, a circuit element constituting the power supply device 131 that does not belong to any of the heating elements 153a, 153b, 153c and the winding element 163 is referred to as a general element 154.

  Further, a substrate 155, an insulator 157, and a presser fitting 161 are also arranged inside the hollow structure 158.

  The material constituting the housing 151 may be an electrical insulator. This is for ensuring long life. The specific reason will be explained later.

  In addition, in this case, an electrical insulator such as an insulating sheet (not shown) may be attached to a predetermined surface of the hollow structure 158 in order to ensure long life. preferable. This specific reason will also be described later.

  The casing 151 (hollow structure 158) has an opening 159 on any one of the side surfaces (surface along the axis z), and the opening 159 is sealed by the plate 152.

  The plate 152 (corresponding to the metal plane of the present invention) is made of metal (the inventors adopted aluminum, but is not limited to this. It is important that the plate 152 be made of a material having excellent thermal conductivity and heat dissipation. And the opening 159 of the casing 151 (hollow structure 158) is sealed. In addition, the heat radiation electrodes 171 of the heat generating elements 153a, 153b, and 153c are arranged in close contact with each other. This is because the heat generated in the heating elements 153a, 153b, and 153c is radiated using the plate 152.

  Here, the plate 152 is a member having a high thermal conductivity such as a metal and a large surface area, that is, a member exhibiting a high heat dissipation effect (not shown, for example, the casing 31, a metal panel having a large surface area, etc. Any other member may be used as long as it satisfies the above conditions. By comprising in this way, the thermal radiation using the plate 152 can be performed more efficiently.

  Here, the plate 152 is preferably configured as a plane having at least a predetermined thickness t4. By doing so, the plate 152 can be prevented from being distorted. According to the experiments by the inventors, the predetermined thickness t4 may be 1 mm or more in the case where the plate 152 is made of aluminum, and a better result is obtained if it is 2 mm or more.

  The surface area of the member (not shown) is the back surface of the surface of the plate 152 (here, the surface area of the plate 152 is partially concealed by the casing 151 (hollow structure 158)). Need to be wider). As a result, heat can be radiated over a wide area, and the heat dissipation effect is enhanced.

  Furthermore, the part where the plate 152 of the member (not shown) is in close contact with each other needs to be a flat surface. By doing in this way, adhesiveness can be improved.

  Further, in order to maintain the close arrangement of the plate 152 and the member (not shown), it is important to fix the plate 152 to the member (not shown).

  The inventors provided through-holes 271a, 271b, and 272 in the plate 152 at three locations, and using this, the plate 152 was fixed to the member (not shown) with screws (not shown) or the like.

  Here, the through hole 271a is one end in the long side direction of the plate (axis z), and the through hole 271b is in the long side direction of the plate (axis z) at the center in the short side direction (axis x) of the plate. And the through hole 272 is the center of the long side direction of the plate (axis z) and one of the short side direction (axis x) of the plate. Placed at the end of the. Then, the plate 152 was fixed to the member (not shown) using the three through holes 271a, 271b, and 272.

  The inventors have actually conducted a test and confirmed that the plate 152 and the above-described member (not shown) can be disposed in close contact with each other in consideration of setting the thickness t4 of the plate 152 to a predetermined value or more. ing.

  In addition, although it was set as three about the through-holes 271a, 271b, and 272 in the above, it is not limited to this, You may provide many more through-holes.

  Further, the adhesiveness may be enhanced by sandwiching an adhesive or a double-sided tape without a base material between the plate 152 and the member (not shown) and pressing it.

  Further, the plate 152 needs to be configured so that the portions other than the heat radiation electrode 171 of the heat generating elements 153a, 153b, and 153c, the general element 154, and the winding element 163 do not contact each other (that is, the power supply device). Of the circuit elements constituting 131, only the heat radiation elements 153a, 153b, and 153c are in contact with the plate 152). Furthermore, it is necessary for the substrate 155 not to contact the plate 152.

  The reason for this is to realize the long life of the power supply device 131. That is, the heat generating elements 153a, 153b, and 153c are surely radiated from the heat radiating electrode 171. On the other hand, contact with the plate 152 that is made of metal, that is, a conductor, directly leads to the occurrence of an electrical short circuit. If an electrical short circuit occurs, it naturally leads to a failure of the power supply device 131, and long life cannot be realized. Therefore, the power supply device 131 has the above configuration.

  FIG. 21 is a schematic diagram of the heat generating element 153a (the heat generating elements 153b and 153c are basically the same), and has a heat radiation electrode 171 as shown in FIG. This is arranged so as to be in close contact with the plate 152.

  Here, some of the heating elements 153a, 153b, and 153c are provided with fixing through holes (not shown). For example, it is assumed that a fixing through hole (not shown) is not provided in 153a and 153b. In such a case, it is preferable to fix using the presser fitting 161 and the screw 162.

  At this time, heating elements (in this case, heating elements 153a and 153b) that are not provided with fixing through-holes (not shown) are arranged close to each other, and the screws 162 and the like are used only by a single pressing metal fitting 161. It is preferable that the plate 152 and the heat radiation electrode 171 are in close contact with each other.

  By doing in this way, the number of parts can be reduced as compared with the case where the holding metal fitting 161 is provided for each heating element (in this case, the heating elements 153a and 153b) not provided with a fixing through hole (not shown). I can do it. Therefore, the cost of the lighting device 1 (power supply device 131) can be reduced.

  Since the general element 154 and the winding element 163 have a small amount of heat generation, the general element 154 and the winding element 163 do not need to be in close contact with the plate 152, and are arranged so that no contact occurs to prevent the electrical short circuit.

  However, the winding element 163 is arranged on the substrate 155 so that the central axis of the winding element 163 is at an angle γ with respect to the axis z which is the long side direction of the substrate 155, as shown in FIG. . By arranging the winding element 163 in this way, the power supply device 131 is reduced in size.

  Here, as shown in FIG. 14B, the winding element 163 is configured by winding a conducting wire (not shown) around the core 163a. A winding portion 163b is formed by winding a conducting wire (not shown). At this time, the width t9 of the core 163a (that is, the width along the central axis of the winding element 163) t9 is a circuit element (heating elements 153a, 153b, 153c, general element 154) constituting the power supply device 131 constituting the power supply device 131. In general, the inventors have prototyped the power supply device 131 with a maximum output power of 100 W, and found that the width of the core 163a of the winding element 163 is the largest value among the winding elements 163). t9 is a circuit element (the heating elements 153a, 153b, and 153c, the general element 154, and the winding element 163) constituting the power supply device 131).

  Therefore, in determining the size of the power supply device 131, the arrangement of the winding element 163 on the substrate 155 is a key point. Therefore, the inventors arranged the substrate 155 so that the central axis of the winding element 163 is at an angle γ with respect to the axis z which is the long side direction of the substrate 155 as described above.

  In this way, the width t7 in the short side direction (direction along the axis y) of the substrate 155 can be made smaller than the width t9 of the core 163a.

  Here, the angle γ is preferably in the range of 30 to 60 degrees, more preferably in the range of 40 to 50 degrees.

  For that reason, if the angle γ is 60 degrees or more, it is necessary to increase the width t7 of the short side direction of the substrate 155. Conversely, if the angle γ is 30 degrees or less, This is because it is necessary to increase the width t8 in the long side direction of the substrate 155.

  In particular, when a plurality of winding elements 163 are required, it is not preferable to set the angle γ to 30 degrees or less.

  For this reason, in the present embodiment, the winding element 163 has only one winding element as described above. For example, a power factor correction circuit (not shown) is connected to the power supply device. When added to 131, a booster coil (not shown) is required. The step-up coil (not shown) is also a winding element 163, and in this case, two winding elements 163 exist in the circuit elements constituting the power supply device 131. In this case, if the angle γ is 30 degrees or less, it is necessary to cumulatively increase the width t8 of the substrate 155 in the long side direction.

  Here, it is also preferable to configure the substrate 155 as a double-sided mounting substrate. By doing so, circuit elements constituting the power supply device 131 can be efficiently arranged on the substrate 155, and the power supply device 131 can be further downsized.

  At this time, part of the circuit elements constituting the power supply device 131 (including all of the heating elements 153a, 153b, and 153c and all of the winding elements 163, and part of the general elements 154) Is also held (mounted) on one surface of the substrate 155. Further, the remaining circuit elements (including the remaining general elements 154) constituting the power supply device 131 are held (mounted) on the other surface of the substrate 155.

  Here, the circuit elements mounted on the other surface of the substrate 155 are the remainder of the general elements 154 as described above, but these elements are limited to the small elements 160. The small element 160 referred to here is an element of the general element 154 whose mounting height (height along the x-axis with the other surface of the substrate 155 as the origin) is a width t5 or less. .

  As will be described later, the other surface of the substrate 155 is arranged to face the surface of the hollow structure 158 via a width t5. Therefore, only the small element 160 having a mounting height of the width t5 or less is mounted on the other surface of the substrate 155. The width t5 is about several mm (for example, 5 mm or less).

  The general element 154 mounted on one surface of the substrate 155 is not particularly limited in height at the time of mounting (a height along the x axis with one surface of the substrate 155 as the origin). The inventors made a prototype of the power supply device 131 with a maximum output power of 100 W, and the height when the winding element 163 was mounted was that the circuit elements constituting the power supply device 131 (heating elements 153a, 153b, 153c, general Among the circuit elements included in the element 154 and the winding element 163), it was high. That is, the height when the heating elements 153a, 153b, 153c and the general element 154 are mounted is equal to or less than the height when the winding element 163 is mounted. Therefore, even if the height of the general element 154 mounted on one surface of the substrate 155 is not particularly limited, the power supply device 131 is not enlarged.

  Therefore, the effect of configuring the substrate 155 as a double-sided mounting substrate is exhibited, and the power supply device 131 can be further downsized.

  Further, as for the substrate 155, it may be a general glass epoxy substrate. Of course, a metal substrate, an alumina ceramic substrate, an aluminum nitride substrate, or the like may be used.

  Further, the substrate 155 has a rectangular shape as shown in the figure. The heating elements 153a, 153b, and 153c are outside the substrate 155 by a predetermined interval t6 from one of the ends (specific end 156) among the ends along the long side direction (axis z). It is mounted on the substrate 155 so that the heat radiation electrode 171 is positioned on an axis (axis x) perpendicular to the mounting surface.

  FIG. 22 shows a state of the heat generating element 153 b mounted on the substrate 155. In this way, the heating element 153b is placed on the substrate 155 so that the heat radiation electrode 171 is positioned on the axis (axis x) that is outside the specific end 156 by a predetermined interval t6 and perpendicular to the mounting surface of the substrate 155. Implemented. The heating elements 153a and 153c are similarly mounted on the substrate 155.

  That is, in the power supply device 131, a predetermined interval t6 is generated between the plate 152 and the specific end 156.

  The predetermined interval t6 may be an arbitrary interval. However, if the interval is too narrow, the withstand voltage between the substrate 155 and the plate 152 may be insufficient (that is, the wiring pattern ( (Not shown) may cause an electrical short circuit to the plate 152). In the experiments by the inventors, it has been confirmed that if there is an interval of 1 mm or more, no electrical short circuit occurs.

  Further, an insulator 157 that is an electrical insulator is inserted between the plate 152 and the specific end 156 (a portion at a predetermined interval t6). Thereby, there is an effect that the withstand voltage between the plate 152 and the substrate 155 can be further increased. This also has the effect of preventing the substrate 155 from moving within the hollow structure 158.

  Further, the plate 152 and the substrate 155 are disposed along the axis z (see FIG. 20) so that the longitudinal directions thereof are parallel to each other, and the angle formed by the short side direction is approximately 90 degrees (ie, The angle between the axis x along the short side direction of the plate 152 and the axis y along the short side direction of the substrate 155 is approximately 90 degrees.

  Further, the length along the axis z of the casing 151 (in the case of a quadrangular prism shape) substantially coincides with the longitudinal width (the width along the axis z) t8 of the substrate 155, and the length along the axis y. The height substantially coincides with the width (width along the axis y) t7 in the short side direction of the substrate 155.

  The width of the casing 151 along the axis x is the highest mounting height (axis x) of the circuit elements (heating elements 153a, 153b, 153c, general element 154, and winding element 163) constituting the power supply device 131. (Along the winding element 163 in the inventors' prototype) (the width t5 is about several millimeters and has almost no effect).

  By doing so, the size of the housing 151 can be minimized. This contributes to reducing the size of the power supply device 131.

  Furthermore, with the above-described configuration, even if an impact is applied to the power supply device 131, the substrate 155 has little space to move in the hollow structure 158. In addition, the hollow structure 158 includes five surfaces including an insulator (resin) except for the surface on the plate 152 side.

  In particular, the other surface of the substrate 155 can be cited as a portion where the occurrence of an electrical short circuit is a concern. This is because this surface is arranged to face the surface of the hollow structure 158 via a width t5 (about several mm). However, as described above, the surface of the hollow structure facing this surface (the other surface of the substrate 155) is made of an insulator (resin), so that the risk of an electrical short circuit is eliminated.

  In addition, an insulator 157 is inserted between the plate 152 and the specific end 156 on the surface on the plate 152 side.

  Therefore, in the power supply device 131, the possibility of an electrical short circuit occurring therein can be eliminated. Therefore, since there is no failure due to the occurrence of an electrical short circuit, stable long life can be exhibited. Furthermore, although the occurrence of an electrical short circuit has a risk of electric shock to the user, the possibility of this occurrence is also eliminated, and it can be said that this is a safe power supply device.

  When the casing 151 of the power supply device 131 is made of metal, it is preferable to attach an electrical insulator such as an insulating sheet (not shown) to the surface of the hollow structure 158 facing the other surface of the substrate 155. . By doing in this way, it is possible to prevent an electrical short circuit from occurring on the other surface of the substrate 155, which is a part where the electrical short circuit is a concern.

  Here, in the in-vehicle discharge lamp lighting device disclosed in Patent Document 4, the lighting circuit unit is disposed in the opened metal case body. And it is supposed that the opening part of a case body will be obstruct | occluded with the attachment flange made from resin.

  With such a configuration, it is said that heat generated from the components constituting the lighting circuit unit can be radiated.

  However, it is considered difficult to apply the in-vehicle discharge lamp lighting device disclosed in Patent Document 4 to a power supply device for a lighting device using LEDs. That is, a lighting circuit portion (corresponding to a circuit constituting the power supply device) in Patent Document 4 is inserted into a metal case body (corresponding to a casing of the power supply device). Certainly, it can be considered that heat generated as a loss from the circuit elements constituting the lighting circuit portion can be radiated by adopting such a configuration, but the case body is made of metal as described above.

  That is, in the in-vehicle discharge lamp lighting device disclosed in Patent Document 4, the mounting flange that closes the case body is made of resin, but most of the surrounding flange is made of metal. In such a state, there is a risk that a part of the lighting circuit portion touches the case body made of metal due to some impact or the like. Since the case body is made of metal, an accident such as an electrical short-circuit may occur.

  This is a problem that, contrary to the long life required for the power supply device of the lighting device using LEDs, leads to unstable life characteristics.

  In addition, in the in-vehicle discharge lamp lighting device disclosed in Patent Document 4, after the lighting circuit portion is arranged in the case body, a risk that a part of the lighting circuit portion touches the case body made of metal is avoided. For this reason, it is said that it is filled with a filler, and heat is released using this, but the thermal conductivity of the filler is lower than that of metals such as aluminum, and the heat dissipation through the filler is actually There is a question as to whether or not this is done properly.

  On the other hand, the power supply device 131 realizes long life. Specifically, the housing 151 is made of resin, and a metal plate 152 is attached to the opening 159. Of the circuit elements (heating elements 153a, 153b, 153c, general element 154, winding element 163) constituting the power supply device 131 constituting the power supply device 131, the plate 152 has a heat radiation electrode 171 of the heating elements 153a, 153b, 153c. Only the plate 152 and the heat radiation electrode 171 were placed in close contact with each other. As a result, heat generated as a loss in the heating elements 153a, 153b, and 153c can be appropriately dissipated.

  Furthermore, since the housing 151 is a resin case, even if there is any impact, the unnecessary portions of the heating elements 153a, 153b, 153c and the general element 154 are prevented from coming into contact with the metal plate 152. It is out. Therefore, an electrical short circuit does not occur, and a stable long life is realized.

  Further, the arrangement of the winding element 163 has been devised, and the power supply device 131 has been successfully reduced in size. The inventors prototyped the power supply device 131 with a maximum output power of 100 W. As a result, it has been confirmed that the size can be 28 mm (width along the axis x) × 28 mm (width along the axis y) × 220 mm (width along the axis z).

(Embodiment 3)
The power supply unit 301 according to the third embodiment can be configured using the power supply device 302. As will be described later, the power supply unit 301 can suitably turn on the light source unit 3 including the solid light emitting element 32. Further, the present invention is applicable not only to the light source unit 3 including the solid light emitting element 32 but also to a device (for example, a direct current motor) that can be driven by direct current.

  FIG. 23 is a schematic diagram of an office 311 to which a plurality of lighting devices 303 using the power supply unit 301 are attached (here, four, but not limited thereto).

  In this case, power supply necessary for driving (lighting) the lighting device 303 (for example, power supply from the commercial power supply 42) is generally performed by a feed wiring using the wiring 321.

  In addition, when a power supply device 302 that can set a reference operating point such as the power supply devices 2 and 131 is adopted, the reference operating point can be set using wired communication. is there.

  Here, when a plurality of lighting devices 303 are used as in the office 311, as in the case of power supply, wiring for wired communication for the purpose of setting a reference operating point is sent using the wiring 322. It is desirable to use wiring.

The power supply unit 301 is a unit that can easily perform the above-described feed wiring.
FIG. 24 is a perspective view showing the appearance of the lighting device 303. The illumination device 303 includes the light source unit 3 as a component, similar to the illumination device 1. The description relating to the light source unit 3 has already been made and will not be repeated here.

  Further, instead of the power supply device 2 or the power supply device 131, a power supply unit 301 is included as a component. Hereinafter, the power supply unit 301 will be described in detail.

  The power supply unit 301 includes a power supply device 302, a base plate 304, a terminal block 305 for commercial power supply 42, a terminal block 306 for setting a reference operating point, and a terminal block 307 for the wiring cable 6. FIG. 25 is a plan view of the power supply unit 301 viewed from the direction F in FIG.

  The power supply device 302 is a power supply device that can suitably drive the solid state light emitting element 32 (light source unit 3), and may be, for example, the power supply devices 2 and 131. In addition, what is necessary is just to be able to supply direct current to the solid state light emitting device 32 (light source unit 3). At this time, it is preferable that the long life can be realized, and it is preferable that the reference operating point can be set.

  Here, the power supply device 302 may be driven by direct current or may be driven by alternating current. That is, a power supply device that satisfies the above requirements such as long life and can suitably drive the solid state light emitting element 32 (light source unit 3) can be driven by alternating current even if it is driven by direct current. There may be.

  The base plate 304 is a plate that holds the power supply device 302, the commercial power supply terminal block 305, the reference operating point setting terminal block 306, and the wiring cable 6 terminal block 307.

  The base plate 304 is preferably made of metal such as aluminum rather than metal in view of heat dissipation. This is because the power supply device 302 is disposed in close contact with the base plate 304, so that heat generated as a loss in the power supply device 302 can be transferred to the base plate 304 and radiated from the surface of the base plate 304. This enhances the heat dissipation of the power supply device 302 and contributes to extending its life.

  In order to improve the adhesion between the base plate 304 and the power supply device 302, the base plate 304 is preferably configured as a plane, and the thickness t10 is preferably set to a predetermined value or more. Regarding the thickness t10, in the inventor's test, it is confirmed that when the base plate is made of aluminum, it may be 1 mm, and if it is 2 mm, a better result can be obtained.

  By doing so, the adhesion between the base plate 304 and the power supply device 302 can be improved.

  When the power supply device 2 is adopted as the power supply device 302, a better result can be obtained. This is because the power supply device 2 has a housing 5. The housing 5 is also a flat surface and has at least a predetermined thickness t1. Combined with this effect, the base plate 304 and the casing 5 of the power supply device 2 are in good contact with each other, and a desired heat dissipation effect can be obtained satisfactorily.

  Further, when the power supply device 131 is adopted as the power supply device 302, better results can be obtained as in the case where the power supply device 2 is adopted. This is because the power supply 131 has a plate 152. The plate 152 is also a flat surface and has at least a predetermined thickness t4. Combined with this effect, the base plate 304 and the plate 152 of the power supply 131 are in good contact with each other, and a desired heat dissipation effect can be obtained satisfactorily.

  Further, when the thickness t10 of the base plate 304 is set to a predetermined value or more, there is a merit that it is possible to realize appropriate holding of the power supply device 302 and the like. When the thickness t10 of the base plate 304 is less than or equal to a predetermined value, there is a risk that the power supply device 302 may be bent and distorted due to the weight of the power supply device 302 or the like. The thickness t10 of the base plate 304 is preferably set to a predetermined value or more in order to avoid the occurrence of this bending, distortion, and the like.

  The terminal block 305 for the commercial power source 42 is provided with a receiving terminal 305a and a sending terminal 305b. The receiving terminal 305a is electrically connected to the sending terminal 305b (not shown).

  A wiring 321 is connected to the receiving terminal 305a. A wiring 321 is connected to the sending terminal 305b. Further, the feeding cable 4 is also connected to the sending terminal 305b, and the other end of the feeding cable 4 is connected to the power supply device 302 (note that the feeding cable 4 is connected to the receiving terminal 305a. And the other end may be connected to the power supply 302).

  Here, the terminal block 305 is used for the commercial power source 42 as described above (that is, AC is supplied to the receiving terminal 305a) as described above. This is a case where the power supply device 302 is driven by alternating current.

  If the power supply device 302 is driven by direct current, naturally the receiving side terminal 305a is supplied with direct current instead of the alternating current from the commercial power source 42. That is, the terminal block 305 is used for direct current.

  With the connection described above, the alternating current (or direct current) supplied to the receiving terminal 305 a can be supplied to the power supply device 302.

  At the same time, alternating current (or direct current) supplied to the receiving terminal 305a is supplied to the sending terminal 305b. That is, by connecting the sending terminal 305b to the receiving terminal 305a of the commercial power supply terminal block 305 provided in another solid power supply unit 301 via the wiring 321, the receiving terminal 305a is connected to the receiving terminal 305a by alternating current (or , DC) can be supplied. That is, the feed wiring can be easily realized using the terminal block 305.

  Note that when a lighting device that performs information communication (so-called visible light communication) as described in Embodiment Mode 4 is realized, information can be supplied to the power supply device 302 using the wiring 321. There is so-called power line communication.

  The terminal block 306 for setting the reference operating point is provided with a receiving terminal 306a and a sending terminal 306b. The receiving terminal 306a is communicably connected to the sending terminal 306b (not shown).

  A wire 322 for wire communication for the purpose of setting a reference operating point is connected to the receiving side terminal 306a. A wire 322 for wired communication for the purpose of setting a reference operating point is connected to the sending side terminal 306b. Further, a setting signal cable 323 is connected to the sending terminal 306b, and the other end of the setting signal cable 323 is connected to the power supply device 302 (note that the setting signal cable 323 is not connected). May be connected to the sending terminal 305b and the other end may be connected to the power supply device 302).

  With the connection described above, the signal related to the reference operating point setting supplied to the receiving terminal 306 a can be supplied to the power supply device 302.

  At the same time, a signal relating to the reference operating point setting supplied to the receiving terminal 306a is supplied to the sending terminal 306b. That is, by connecting the sending terminal 306b to the receiving terminal 306a of the reference operating point setting terminal block 306 provided in another solid power supply unit 301 via the wiring 322, the sending terminal 306b is connected to the receiving terminal 306a. A signal for setting the operating point can be supplied. That is, the feed wiring can be easily realized using the terminal block 306.

  Note that when a lighting device that performs information communication (so-called visible light communication) as described in Embodiment Mode 4 is realized, information can be supplied to the power supply device 302 using the wiring 322. is there.

  The terminal block 307 for the wiring cable 6 is provided with a receiving side terminal 307a and a sending side terminal 307b. The receiving terminal 307a is electrically connected to the sending terminal 307b (not shown).

  The receiving side terminal 307 a is connected to the power supply device 302 via the wiring cable 6. The sending side terminal 307 b is electrically connected to the light source unit 3 via the wiring cable 324.

  The light source unit 3 connected to the sending terminal 307b via the wiring cable 324 is not limited to one, and a plurality of light source units 3 may be connected. In other words, it is possible to drive a plurality of light source units 3 using one power supply unit 301.

  The power supply unit 301 configured as described above can not only supply power to the light source unit 3, but also when a plurality of lighting devices 303 are used like the office 311, using the wirings 321 and 322, The feed wiring can be easily realized. This greatly reduces the burden (cost, workload, etc.) related to the construction of installing the lighting device 303 (power supply unit 301) in a place where a plurality of lighting devices 303 are used simultaneously (for example, the office 311). This leads to great convenience for the user.

  Note that the base plate 304 is also preferably disposed in close contact with a member having a surface area equal to or greater than that of the base plate 304 (the back surface thereof) such as the housing 5 of the light source unit 3.

  This is because the base plate 304 has the power supply device 302 as described above (in particular, the case 5 when the power supply device 2 is used as the power supply device 302 and the plate 152 when the power supply device 131 is used). It is arranged in close contact with. Therefore, arranging the base plate 304 in close contact with the casing 5 of the light source unit 3 as described above, the heat generated as a loss in the power supply device 302 is not only the base plate 304 but also the casing 5 of the light source unit 3. Etc. can also be used to dissipate heat.

  That is, this leads to more efficient heat dissipation and further extends the life of the power supply device 2.

(Embodiment 4)
Next, the structure of the illuminating device concerning Embodiment 4 of this invention is demonstrated.

  FIG. 26 is a perspective view showing an appearance of lighting apparatus 401 according to Embodiment 4 of the present invention. FIG. 27 is a cross-sectional view showing the structure of the light source unit 403 in the G direction.

  The lighting device 401 includes a power supply device 402 and a light source unit 403. In addition, in the illuminating device 401, about the structure same as the illuminating device 1, the same code | symbol shall be provided and description shall be abbreviate | omitted.

  The power supply device 402 is different from the power supply device 2 in that it has two channels of direct current supplied to the light source unit 403.

  One of the two channels supplies direct current to the first light emitting unit 411, and the other channel supplies direct current to the second light emitting unit 412.

  The channel for supplying direct current to the first light emitting unit 411 is provided with a receiving unit (not shown) and a modulating unit (not shown) in addition to the configuration described in the first embodiment.

  The receiving unit (not shown) receives information supplied from the outside via, for example, the Internet (not shown). The received information is sent to a modulation unit (not shown).

  A modulation unit (not shown) receives the output from the conversion unit 44 and modulates it. Specifically, a part of the output from the smoothing unit 45 is modulated by the unique information of the lighting device 1 held in the setting unit 49, information received by a receiving unit (not shown), or the like.

  The output of the modulation unit (not shown) is supplied to the first light emitting unit 411. That is, the light emission of the first light emitting unit 411 includes unique information of the lighting device 401 held in the setting unit 49 described above, information received by a receiving unit (not shown), and the like.

  By receiving and demodulating this light with a receiver (not shown), the unique information of the lighting device 401 held by the setting unit 49 and the information received by the receiving unit (not shown) It can be obtained by a receiver (not shown).

  For example, so-called visible light communication can be realized by connecting a receiver (not shown) to a personal computer (not shown). In addition, when the unique information of the lighting device 401 is obtained, the position of the receiver (not shown) can be specified.

  In addition, the channel for supplying direct current to the second light emitting unit 412 generates direct current with the configuration described in Embodiment 1, and thus description thereof is omitted here.

  As described above, the direct current supplied from the power supply device 402 to the first light emitting unit 411 is modulated, while the direct current supplied to the second light emitting unit 412 is not modulated.

  The light source unit 403 includes a first light emitting unit 411 and a second light emitting unit 412. The first light emitting unit 411 includes a part of the plurality of solid state light emitting elements 32, and the second light emitting unit 412 includes the remaining part of the plurality of solid state light emitting elements 32.

  An optical element 434 is installed in the light emitting direction of the solid state light emitting element 32 mounted on the substrate 433 (this substrate has the same configuration as the substrate 33) constituting the light source unit 403. Further, the optical element 434 is supported by a support body 435.

  Here, the optical element 434 is, for example, a cylindrical lens or the like, and condenses light from the solid state light emitting element 32 constituting the first light emitting unit 411 at a predetermined condensing angle θ. The predetermined condensing angle θ is determined from the installation conditions of the lighting device 401 and the like. It may be determined based on the required illumination range.

  By doing so, it is possible to limit the illumination range of the first light emitting unit 411 to a desired range.

  Further, the optical element 434 is not installed in the light emitting direction of the solid light emitting element 32 mounted on the substrate 433 constituting the second light emitting unit 412. Therefore, the illumination range of the second light emitting unit 412 depends on the characteristics of the solid light emitting element 32 and the protective translucent plate 436.

  It is important that the protective translucent plate 436 is configured so that the light diffusing action does not occur on the light emission optical path of the first light emitting unit 411. This is because when the light emitted from the first light emitting unit 411 is diffused by the protective translucent plate, it is difficult to limit the illumination range of the first light emitting unit 411 to a desired range.

  As described above, the illumination device 401 can perform illumination with light modulated based on various types of information after limiting to a desired illumination range using the first light emitting unit 411 and the optical element 434. By limiting the illumination range of the modulated light to a desired range, it is possible to prevent light including various types of information from leaking outside the desired range. Thus, for example, visible light communication with high security performance can be performed.

  In addition, by limiting to a desired illumination range and including the unique information of the illumination device 401 in the modulated light, it is possible to easily identify the position of the receiver that receives the information. This can be applied to underground navigation systems.

  The lighting device 401 also performs illumination by the second light emitting unit 412. The second light emitting unit emits unmodulated light and does not limit the illumination range. Therefore, it can be used as so-called general illumination.

  Needless to say, the present invention can be freely modified without departing from the spirit of the present invention. For example, although the light emitting unit 50 is a light emitting diode here, the present invention is not limited to this. EL (Electro-Luminescence) may be used.

  Further, although a thermocouple has been shown as an example for measuring the temperature of the transformer 59 and the like, other temperature detection elements such as a thermistor may be used.

  Further, the power supply devices 2, 131 and the like may be provided with drip-proof properties. Further, the power supply devices 2, 131 and the like may be arranged in a drip-proof case (not shown) or the like. By doing in this way, it can apply to the illuminating device which has drip-proof property.

  The present invention can be applied to a lighting device, and in particular, to a lighting device using a solid light emitting element such as a light emitting diode as a light source using an AC power source. Further, the present invention can be applied to a power supply device that supplies power to a light source unit that uses a solid light emitting element such as a light emitting diode.

It is a perspective view which shows the external appearance of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the power supply device 2 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the light source unit 3 which concerns on Embodiment 1 of this invention. It is a functional block diagram of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure which shows schematic circuit structure of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure explaining the output waveform of the diode bridge which rectifies | straightens alternating current which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure explaining that the light emission intensity of the light emission part 50 is changed by changing the setting of the reference | standard operating point of the light emission part 50 which concerns on Embodiment 1 of this invention. It is a figure explaining the control signal produced by the controller unit. It is a figure explaining that a pulse-like waveform is obtained based on a control signal. It is a figure explaining a target operating point being reset when the operating point of the light emission part 50 has remove | deviated from the predetermined operating range from the reference | standard operating point. It is the flowchart which showed the procedure which changes a duty ratio based on the temperature detected by the detection part 46 of this invention. It is the flowchart shown about the operation | movement by which a duty ratio is determined. It is a figure which shows schematic structure of the main board | substrate 121, sub board | substrate A122, and sub board | substrate B123. 3 is a diagram showing a schematic structure of a winding element 163. FIG. It is a figure which shows arrangement | positioning on the mounting surface of the main board | substrate 121 of the coil | winding element 163. FIG. It is a figure at the time of mounting the circuit element which comprises the power supply device 2 on the mounting surface of the main board | substrate 121, sub board | substrate A122, and sub board | substrate B123. It is a figure which shows that the main board | substrate 121, sub board | substrate A122, and sub board | substrate B123 were arrange | positioned so that the mutual mounting surface might be opposed. It is a perspective view which shows the external appearance of the power supply device 131 which concerns on Embodiment 2 of this invention. It is a top view of the power supply device 131 which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the power supply device 131 which concerns on Embodiment 2 of this invention, Comprising: It is sectional drawing in the D1-D2 surface in FIG. It is a figure which shows the structure of the power supply device 131 which concerns on Embodiment 2 of this invention, Comprising: It is sectional drawing in the E1-E2 surface in FIG. It is a top view which shows the structure of the heat generating element 153a. FIG. 11 is a plan view showing a state where the heating element 153b is mounted on the substrate 155. It is a schematic diagram of the office 311 in which the illuminating device 303 comprised including the power supply unit 301 which concerns on Embodiment 3 of this invention was installed. It is a perspective view which shows the external appearance of the illuminating device 303 comprised including the power supply unit 301 which concerns on Embodiment 3 of this invention. It is a top view of the power supply unit 301 which concerns on Embodiment 3 of this invention. It is a perspective view which shows the external appearance of the illuminating device 401 which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the structure of the light source unit 403. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,303,401 Illuminating device 2,131,302,402 Power supply device 3,403 Light source unit 4 Feeding cable 5,151 Housing 6,324 Wiring cable 21, 33, 155, 433 Substrate 31 Housing part 32 Solid state light emitting element 34, 436 Protective translucent plate 42 Commercial power supply 43 Rectifying unit 44 Conversion unit 45 Smoothing unit 46 Detection unit 47 Instruction unit 48 Selection unit 49 Setting unit 50 Light emitting unit 51, 52 Inductor 53, 63 Capacitor 54 Diode bridge 55, 57 Driver 56, 58 FET
59, 66 Transformer 61, 62, 67 Diode 64, 65 Resistor 68 Controller unit 101 Power supply 121 Main board 122 Sub board A
123 Sub board B
152 Plate 153a, 153b, 153c Heating element 154 General element 156 Specific end 157 Insulator 158 Hollow structure 159 Opening part 160 Small element 161 Holding metal fitting 162 Screw 163 Winding element 163a Core 163b Winding part 171 Heat radiation electrode 271a, 271b 272 Through-hole 301 Power supply unit 304 Base plate 305, 306, 307 Terminal block 305a, 306a, 307a Receiving side terminal 305b, 306b, 307b Sending side terminal 311 Office 321 322 wiring 323 Setting signal cable 411 First light emitting unit 412 2nd Light emitting unit 434 Optical element 435 Support

Claims (14)

A power supply unit including a power supply device that generates direct current,
A first terminal portion for supplying power to the power supply device;
A second terminal portion related to the direct current distribution;
A holding means for holding the power supply device, the first terminal portion, and the second terminal portion;
The first terminal portion and the second terminal portion each include a receiving side terminal and a sending side terminal. The receiving terminal of the first terminal portion is electrically connected to the sending terminal of the first terminal portion and also electrically connected to the power supply device,
The receiving terminal of the second terminal portion is electrically connected to the sending terminal of the second terminal portion, and is also electrically connected to the power supply device,
The power supply unit according to claim 1, wherein the feed terminal of the second terminal unit is electrically connected to at least one predetermined device to which the direct current is distributed. The power supply unit according to claim 1, wherein the holding unit is a flat surface made of metal and has a thickness of 1 mm or more. The holding means further includes:
Holding a third terminal part related to distribution of the instruction signal of the power supply device;
The third terminal portion includes a receiving terminal and a sending terminal,
The receiving terminal of the third terminal portion is connected to the sending terminal of the third terminal so that the instruction signal can be distributed, and the instruction signal can also be distributed to the power supply device. The power supply unit according to claim 3, wherein the power supply unit is connected to the power supply unit. It is an illuminating device comprised including the power supply unit of any one of Claims 1-4, and a light source unit,
The light source unit is
The predetermined device and a plurality of solid state light emitting devices,
The power supply device
A pulsating flow converting means for converting a sine wave voltage supplied via the first terminal portion into a pulsating voltage;
Switch means for outputting the voltage of the pulsating flow output from the pulsating flow conversion means after controlling a duty ratio which is a ratio of an on time to pass the voltage and an off time not to pass the voltage;
Transformer means for transforming the voltage of the pulsating current controlled in duty ratio output from the switch means;
Smoothing means for smoothing the voltage of the transformed pulsating current output from the transformer means;
The pulsating flow converting means, the switch means, the transformer means, and a housing having the smoothing means therein,
At least one surface constituting the housing is a plane and a metal plane composed of metal,
The said metal plane has thickness of 1 mm or more. The illuminating device characterized by the above-mentioned. The power supply device further includes:
A mounting board having a substantially rectangular shape on which the pulsating flow conversion means, the switch means, the transformer means, and the smoothing means are mounted;
The winding element included in the transformer means is mounted on the mounting board in a state where the central axis has an angle of 30 degrees to 60 degrees with respect to the long side direction of the mounting board. 5. The lighting device according to 5. The lighting device according to claim 6, wherein a width of the mounting substrate in a short side direction is narrower than a width along a central axis of the winding element. An electrical insulator is inserted between a back surface of the mounting substrate with respect to a surface on which the winding element is mounted and a surface constituting the housing facing the back surface. The illumination device according to 6 or 7. The pulsating flow conversion means and the smoothing means further include a rectifying element having a heat radiation electrode,
The switch means further includes a switching element having a heat radiation electrode,
The lighting device according to claim 6, wherein the rectifying element and the heat radiation electrode of the switching element are arranged in close contact with the metal plane. At least two of the rectifying element and the switching element are:
The lighting device according to claim 9, wherein the lighting device is arranged in close proximity, and the heat dissipation electrode is fixed to be in close contact with the metal plane by a single fixing plate. A part of the circuit elements constituting the pulsating flow conversion means, the switch means, the transformer means, and the smoothing means are mounted on one mounting surface of the mounting board,
The remaining circuit elements constituting the pulsating flow conversion means, the switch means, the transformer means, and the smoothing means are mounted on the other mounting surface of the mounting board,
The partial circuit element includes all of the winding element, the rectifying element, and the switching element,
The lighting device according to claim 9 or 10, wherein the remaining circuit elements have a mounting height of an arbitrary value or less. The lighting device according to claim 11, wherein the surface of the mounting substrate that faces the other mounting surface is configured by an electrical insulator. The electrical insulator is inserted between the other mounting surface of the mounting substrate and the surface constituting the casing facing the other mounting surface of the mounting substrate. The lighting device described. The holding means is disposed in close contact with the surface that is the flat surface of the member having the metal flat surface and the surface that is a flat surface,
The lighting device according to claim 5, wherein a surface area of the member is larger than a surface area of the holding unit.

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