JP2017022015A - Lighting device and lighting device using the same - Google Patents

Abstract

[PROBLEMS] To improve noise resistance. A lighting device includes a substrate formed in an annular shape and a power supply unit. The power supply unit 2 receives AC power from an external AC power supply and supplies lighting power to the light source unit 1 having the light emitting element 11. The power supply unit 2 includes an input unit 21, a rectification unit 22, a conversion unit 23, and a control unit 24. The substrate 3 is provided with an input unit 21, a rectification unit 22, a conversion unit 23, and a control unit 24 in that order along the circumferential direction. The lighting device 100 further includes a signal line L1. The signal line L1 is formed on the substrate 3, and a control signal supplied from the control unit 24 to the conversion unit 23 flows therethrough. The signal line L1 is wired so that the control signal flows in the direction opposite to the above direction. [Selection] Figure 1

Description

  The present invention generally relates to a lighting device and a lighting device using the lighting device, and more particularly to a lighting device that supplies lighting power to a light source unit having a light emitting element and a lighting device using the lighting device.

  DESCRIPTION OF RELATED ART Conventionally, the lighting fixture (illuminating device) which uses light emitting elements, such as LED (Light Emitting Diode: Light emitting diode), as a light source is known, for example, is disclosed by patent document 1. FIG. The lighting fixture described in Patent Document 1 is a lighting fixture for a general house that is used by being attached to a hanging ceiling as a wiring fixture installed on the fixture mounting surface. This luminaire illuminates a room with light emitted from a light source unit having a plurality of light emitting elements mounted on a substrate.

  The lighting fixture includes a lighting device that receives an AC power supply, generates a DC output, and supplies the DC output to a light emitting element. The lighting device includes a substantially arc-shaped circuit board and circuit components such as a control IC (control unit), a transformer, and a capacitor mounted on the circuit board.

JP 2012-146666 A

  In the lighting fixture as in the above-described conventional example, when the substrate is formed in an annular shape, it is difficult to wire the signal line through which the control signal transmitted from the control unit flows linearly. Therefore, in this case, there is a problem that the noise resistance deteriorates due to the length of the signal line.

  The present invention has been made in view of the above points, and an object thereof is to improve noise resistance.

  The lighting device of the present invention includes a substrate formed in an annular shape, and a power source unit that receives AC power from an external AC power source and supplies lighting power to a light source unit having a light emitting element. An input unit electrically connected to the AC power source, a rectification unit that rectifies AC power supplied from the AC power source, a conversion unit that converts output power of the rectification unit into predetermined DC power, and the conversion A control unit for controlling the control unit, and the substrate is provided with the input unit, the rectification unit, the conversion unit, and the control unit in order along the circumferential direction, and is formed on the substrate. And further comprising a signal line through which a control signal supplied from the control unit to the conversion unit flows, and the signal line is wired so that the control signal flows in a direction opposite to the direction. .

  The illuminating device of this invention is equipped with said lighting device and the said light source part, The said light source part is provided in the area | region different from the area | region in which the said power supply part is provided in the said board | substrate.

  The present invention can improve noise resistance.

It is a schematic diagram which shows the lighting device and illumination device which concern on embodiment. It is a schematic block diagram of the power supply part in the lighting device which concerns on embodiment. It is a disassembled perspective view which shows the outline of the illuminating device which concerns on embodiment. It is a schematic plan view of the illuminating device which concerns on embodiment. FIG. 5A is a schematic plan view illustrating a first surface of a substrate in the lighting apparatus according to the embodiment. FIG. 5B is a schematic plan view illustrating a second surface of the substrate in the lighting apparatus according to the embodiment.

  As illustrated in FIGS. 1 and 2, the lighting device 100 according to the embodiment of the present invention includes a substrate 3 formed in an annular shape and a power supply unit 2. The power source unit 2 receives AC power from an external AC power source AC 1 and supplies lighting power to the light source unit 1 having the light emitting element 11.

  The power supply unit 2 includes an input unit 21, a rectification unit 22, a conversion unit 23, and a control unit 24. Input unit 21 is electrically connected to AC power supply AC1. The rectifier 22 rectifies AC power supplied from the AC power supply AC1. The converter 23 converts the output power of the rectifier 22 into predetermined DC power. The control unit 24 controls the conversion unit 23.

  The substrate 3 is provided with an input unit 21, a rectification unit 22, a conversion unit 23, and a control unit 24 in that order along the circumferential direction.

  The lighting device 100 of this embodiment further includes a signal line L1. The signal line L1 is formed on the substrate 3, and a control signal supplied from the control unit 24 to the conversion unit 23 flows therethrough. The signal line L1 is wired so that the control signal flows in the direction opposite to the above-described direction (that is, the direction in which the input unit 21, the rectification unit 22, the conversion unit 23, and the control unit 24 are arranged in this order).

  Moreover, the illuminating device 101 which concerns on this embodiment is provided with the lighting device 100 and the light source part 1 as shown to FIG. And the light source part 1 is provided in the area | region (2nd area | region A2) different from the area | region (1st area | region A1) in which the power supply part 2 is provided in the board | substrate 3 (refer FIG. 5A).

  Hereinafter, the lighting device 100 and the lighting device 101 of the present embodiment will be described in detail. However, in the following description, the thickness direction of the substrate 3 is the vertical direction, the instrument body 4 side as viewed from the substrate 3 is upward, and the substrate 3 side as viewed from the instrument body 4 is downward. The definition of this direction is not intended to limit the usage pattern of the lighting device 100 and the lighting device 101 of the present embodiment. In addition, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following embodiment, and the technical idea according to the present invention is not deviated from this embodiment. Various changes can be made in accordance with the design or the like as long as they are not.

  As shown in FIGS. 3 and 4, the illumination device 101 according to the present embodiment includes, in addition to the lighting device 100 and the light source unit 1, an instrument body 4, a protective cover 5, a power source cover 6, a light source unit cover 7, and a globe 8. It has. In addition, it is not the meaning which limits the structure of the illuminating device 101, The illuminating device 101 should just be provided with the lighting device 100 and the light source part 1 at least.

  As shown in FIG. 3, the instrument body 4 is attached to a ceiling 201 that is a construction material. The ceiling 201 is provided with an attachment member 202 which is a power supply socket that supports the instrument body 4 and supplies AC power from an AC power supply AC1 (see FIG. 2) such as a commercial power supply to the power supply unit 2. The attachment member 202 is, for example, a hook ceiling or a hook rosette. A cylindrical adapter 203 is mechanically and electrically connected to the mounting member 202.

  The instrument body 4 is composed of a disk-shaped metal plate 41. In the center of the metal plate 41, a circular through hole 41A for passing the adapter 203 is provided. In addition, an annular recess 41 </ b> B that is recessed upward is provided around the through hole 41 </ b> A in the metal plate 41. The substrate 3 is accommodated in the recess 41B.

  A fixing member 42 formed in a flat cylindrical shape is fixed to the center of the lower surface of the instrument body 4 using screws or the like. The inner diameter of the fixing member 42 is substantially the same as the diameter of the through hole 41A. The fixing member 42 is fixed to the instrument body 4 so as to be substantially concentric with the through hole 41A. An adapter 203 is attached to the fixing member 42. Specifically, the adapter 203 is fixed to the fixing member 42 by the hooking claws 203 </ b> A provided on the side surfaces of the adapter 203 being hooked on the fixing member 42.

  Hereinafter, a method of attaching the instrument body 4 to the ceiling 201 will be described. First, the adapter 203 is attached to the attachment member 202. In this state, the instrument body 4 is pushed upward from below by passing the adapter 203 through the through hole 41 </ b> A and the fixing member 42, whereby the hooking claw 203 </ b> A of the adapter 203 is hooked on the lower end portion of the fixing member 42. Thereby, the adapter 203 is fixed to the fixing member 42, and the instrument body 4 is attached to the ceiling 201.

  A protective cover 5 is attached to the lower surface of the instrument body 4 so as to cover the peripheral surface of the fixing member 42. The protective cover 5 is formed in a flat cylindrical shape like the fixing member 42. However, the inner diameter of the protective cover 5 is larger than the outer diameter of the fixing member 42. The protective cover 5 is attached to the instrument body 4 so as to be substantially concentric with the through hole 41A and the fixing member 42. By attaching the protective cover 5 to the instrument body 4, the adapter 203 is covered by the protective cover 5 so that only the lower part of the adapter 203 is exposed. For this reason, the adapter 203 is protected by the protective cover 5.

  Three further glove attachment members 43 are provided on the lower surface of the instrument body 4. These glove attachment members 43 are provided along the outer peripheral edge of the instrument body 4, and the glove 8 is detachably attached thereto.

  The substrate 3 is attached (supported) to the instrument body 4 by being fixed to the instrument body 4 using, for example, screws. The substrate 3 is formed in a substantially rectangular plate shape whose four corners are curved in an arc shape. As shown in FIGS. 1 and 5A, a circular hole 31 that penetrates in the thickness direction (vertical direction) of the substrate 3 is provided in the center of the substrate 3. Further, the first surface (lower surface) 3A of the substrate 3 is divided into a first region A1 and a second region A2, as shown in FIG. 5A.

  The first area A1 is an annular area around the hole 31. A plurality of electronic components 26 constituting the power supply unit 2 are mounted in the first region A1. The electronic component 26 is, for example, a resistor, a capacitor, an inductor, a switching element, or the like. In addition, the light receiving unit 27 is mounted in the first region A1. The light receiving unit 27 receives an infrared signal from a remote controller that is an operating device of the illumination device 101 of the present embodiment. The light receiving unit 27 is arranged inside a case 28 (see FIG. 3) attached to the substrate 3.

  The second area A2 is an annular area around the first area A1. In other words, the first region A1 is an inner region on the first surface 3A of the substrate 3, and the second region A2 is an outer region on the first surface 3A of the substrate 3. In the second region A2, a plurality of light emitting elements 11 constituting the light source unit 1 are mounted. In the illuminating device 101 of this embodiment, the light emitting element 11 is a light emitting diode. Of course, the light-emitting element 11 is not limited to the light-emitting diode, and the light-emitting element 11 may be, for example, an electroluminescent element other than the light-emitting diode or a laser diode.

  That is, in the illumination device 101 of the present embodiment, the light source unit 1 is provided in a region (second region A2) different from the region (first region A1) where the power supply unit 2 is provided in the substrate 3. For this reason, in the illuminating device 101 of this embodiment, handling becomes easy by providing the light source part 1 and the power supply part 2 on the board | substrate 3 of 1 sheet.

  On the second surface (upper surface) 3B of the substrate 3, as shown in FIG. 5B, a radiator 32 is provided. The heat radiating body 32 is made of a metal conductor such as copper foil, for example, and is annularly provided on the second surface 3B of the substrate 3 so as to face the light source unit 1 (second region A2) with the substrate 3 interposed therebetween. . For this reason, the heat radiating body 32 is thermally coupled to the light source unit 1 via the substrate 3 and radiates heat generated by lighting of the light source unit 1 to the outside.

  The substrate 3 is provided with a metal power source cover 6 covering the first area A1 and a light source cover 7 having translucency covering the second area A2. The power supply unit cover 6 is formed in a disk shape having an open top surface, and covers the first region A1 from below so as not to contact the electronic component 26 constituting the power supply unit 2. The power source cover 6 has a lower surface (bottom surface) having a smaller diameter than the upper surface. Further, a circular through hole 61 penetrating in the thickness direction is provided on the bottom surface of the power source cover 6. Through this through hole 61, the lower portion of the adapter 203 is exposed to the outside. The power source cover 6 is positioned on the substrate 3 by inserting, for example, a protrusion provided on the power source cover 6 into a hole provided on the substrate 3. The power source cover 6 is attached to the substrate 3 by being fixed to the substrate 3 using, for example, screws.

  The light source unit cover 7 is formed in a disk shape with an upper surface opened, and covers the second region A2 from below so as not to contact the light emitting element 11 constituting the light source unit 1. A circular window hole 71 penetrating in the thickness direction is provided on the lower surface (bottom surface) of the light source cover 7. The power source cover 6 is exposed to the outside through the window hole 71. A light receiving cover 7 </ b> A that covers the case 28 of the light receiving unit 27 from the lower side is integrally provided on the inner peripheral edge of the window hole 71 of the light source unit cover 7. The light receiving cover 7A is formed of a light-transmitting material so that the light receiving unit 27 can receive infrared signals. The light source unit cover 7 is positioned on the substrate 3 by inserting, for example, a protrusion provided on the light source unit cover 7 into a hole provided on the substrate 3. And the light source part cover 7 is attached to the board | substrate 3 by fixing to the board | substrate 3 in the form which hold | suppresses the power supply part cover 6 from the downward direction using a screw etc., for example. In the illuminating device 101 of this embodiment, the screw used for attaching the power source cover 6 and the screw used for attaching the light source cover 7 are shared.

  The glove 8 is attached to the instrument body 4 using the above-described glove attachment member 43. The globe 8 is formed of, for example, a milky white translucent material. The globe 8 covers the substrate 3, the power supply unit cover 6, and the light source unit cover 7 from below by being attached to the instrument body 4.

  Here, the circuit configuration of the power supply unit 2 will be described. As shown in FIG. 2, the power supply unit 2 includes an input unit 21, a rectification unit 22, a conversion unit 23, a control unit 24, and a control power supply unit 25.

  The input unit 21 is electrically connected to the AC power supply AC1 and receives AC power from the AC power supply AC1. The input unit 21 may have a filter circuit, for example. In this case, since the noise superimposed on the electric current input from AC power supply AC1 can be removed by the input part 21, it is preferable.

  The rectifying unit 22 is configured by a diode bridge, for example, and rectifies and outputs AC power supplied from the AC power supply AC1 via the input unit 21.

  The converter 23 is configured to convert the output power of the rectifier 22 into predetermined DC power. In the lighting device 100 and the lighting device 101 according to the present embodiment, the conversion unit 23 includes a step-up chopper unit 231 and a step-down chopper unit 232. The step-up chopper unit 231 is a so-called PFC (Power Factor Correction) circuit, and boosts and outputs the output voltage of the rectifying unit 22. The step-down chopper unit 232 steps down the output voltage of the step-up chopper unit 231 and outputs it to the light source unit 1.

  The control unit 24 has, for example, a microcomputer as a main component, and executes various processes by executing a program stored in the memory. The program may be provided through a telecommunication line or may be provided by being stored in a storage medium. The control unit 24 gives a control signal to each of the switching element included in the step-up chopper unit 231 and the switching element included in the step-down chopper unit 232, and controls the step-up chopper unit 231 and the step-down chopper unit 232 by switching on / off. . That is, the control unit 24 controls the conversion unit 23.

  The control unit 24 performs PWM control of the step-down chopper unit 232 by, for example, giving a PWM (Pulse Width Modulation) signal to the switching element of the step-down chopper unit 232. Thereby, the control unit 24 controls the current flowing through the light source unit 1 to be a constant current. If the lighting device 100 and the lighting device 101 of the present embodiment are lighting devices and lighting devices having a dimming function, the control unit 24 may perform dimming control of the light source unit 1.

  The control power supply unit 25 is composed of, for example, a three-terminal regulator, and receives the output of the rectification unit 22 and generates a voltage necessary for the operation of the control unit 24.

  The circuit configuration of the power supply unit 2 is an example, and other circuit configurations may be used as long as the circuit configuration can light the light source unit 1. In the example illustrated in FIG. 2, the control unit 24 controls both the step-up chopper unit 231 and the step-down chopper unit 232, but other configurations may be used. In the lighting device 100 and the lighting device 101 of this embodiment, it is assumed that the control unit 24 is configured to control only the step-down chopper unit 232. In this configuration, a control circuit that controls the boost chopper unit 231 may be provided separately from the control unit 24.

  By the way, in the lighting device 100 of the present embodiment, the light emitting element 11 of the light source unit 1 and the electronic component 26 constituting the power source unit 2 are electrically connected to each other by a conductor formed on one surface (first surface 3A) of the substrate 3. It is connected to the. In the lighting device 100 of the present embodiment, the conductor mainly configures the signal line L1, the power line L2 including the pair of electric wires L21 and L22, and the electric wire L3. In the lighting device 100 of the present embodiment, the signal line L1, the power line L2, and the electric wire L3 are all conductors formed on the substrate 3, that is, printed wiring, but may be lead wires, for example.

  The signal line L1 electrically connects the control unit 24 and the conversion unit 23, and a control signal (for example, a PWM signal) supplied from the control unit 24 to the conversion unit 23 (step-down chopper unit 232) flows. The power line L <b> 2 electrically connects the input unit 21, the rectifier 22, the converter 23 (the step-up chopper unit 231 and the step-down chopper unit 232), and the light source unit 1, and an AC power supply via the input unit 21. An alternating current supplied from AC1 flows. In addition, although illustration is abbreviate | omitted, each of the pressure | voltage rise chopper part 231, the control part 24, and the control power supply part 25 is electrically connected to the power line L2.

  The electric wire L3 electrically connects the input unit 21 and the control unit 24. The electric wire L3 is used for the controller 24 to monitor the alternating current flowing from the alternating current power supply AC1. That is, the control part 24 detects the power failure and instantaneous power failure of AC power supply AC1 by monitoring the alternating current which flows from AC power supply AC1 via the electric wire L3. Whether or not the electric wire L3 is provided is arbitrary.

  Here, in the design of the conductor formed on the substrate 3, it is preferable to shorten the wiring length of the conductor and increase the width of the conductor. In order to shorten the wiring length of the conductor, it is preferable to form the conductor in a straight line. However, when the substrate 3 is formed in an annular shape as in the lighting device 100 of the present embodiment, the conductor is formed in a straight line. It ’s difficult. For this reason, when the conductor constituting the signal line L1 is formed on the substrate 3 formed in an annular shape without taking any measures, the wiring length of the conductor constituting the signal line L1 is increased. May deteriorate or radiation noise from the signal line L1 may increase.

  Therefore, in the lighting device 100 of the present embodiment, as shown in FIG. 1, the input portion 21, the rectifier 22, and the converter 23 (step-up) are sequentially provided on the substrate 3 in the direction along the circumferential direction (clockwise). A chopper unit 231 and a step-down chopper unit 232) and a control unit 24 are provided. The signal line L1 is wired so that the control signal flows in the opposite direction (counterclockwise) to the above direction (clockwise). FIG. 1 is a schematic diagram of the lighting device 100 and the lighting device 101 according to the present embodiment. For convenience of explanation, the signal line L1 and the input unit 21 are represented in a simplified form.

  For this reason, in the lighting device 100 of the present embodiment, since the conversion unit 23 (step-down chopper unit 232) is disposed in the vicinity of the control unit 24, the signal line L1 is wired along the direction (clockwise). In comparison, the wiring length of the signal line L1 can be shortened. As a result, in the lighting device 100 of the present embodiment, noise resistance can be improved by reducing the wiring length of the signal line L1, and further, radiation noise from the signal line L1 can be reduced.

  Further, in the lighting device 100 of the present embodiment, the signal line L1 is wired in a region where the conversion unit 23 (step-down chopper unit 232) is provided (a region where a direct current flows). For this reason, in the lighting device 100 according to the present embodiment, the signal line L1 is compared with the case where the signal line L1 is wired in a region where the input unit 21, the rectifying unit 22, and the conversion unit 23 (step-up chopper unit 231) are provided. And since it is easy to ensure an electrical insulation distance between the power lines L2, it is preferable.

  Further, in the lighting device 100 of the present embodiment, the power line L2 is wired inside the signal line L1 in the radial direction of the substrate 3. For this reason, in the lighting device 100 of the present embodiment, compared to the case where the power line L2 is wired outside the signal line L1, the wiring length of a part of the power lines L2 through which the high-frequency current due to the high-frequency switching of the switching element flows is reduced. Can be shortened. As a result, in the lighting device 100 of the present embodiment, radiation noise from the power line L2 can be reduced.

  Furthermore, with the above configuration, the signal line L1 is disposed outside the power line L2 in the radial direction of the substrate 3. For this reason, in the lighting device 100 according to the present embodiment, the signal line L1 can be wired at a distance from the power line L2 by making use of a larger area than the inside of the substrate 3, so that the noise resistance can be further improved. Note that whether or not to adopt the configuration is arbitrary.

  In the lighting device 100 of the present embodiment, the input unit 21, the rectification unit 22, the conversion unit 23, and the control unit 24 are provided in order in the substrate 3 in the clockwise direction, but may be provided in the counterclockwise direction.

  Further, in the lighting device 100 of the present embodiment, as shown in FIG. 1, there is a portion where the signal line L1 intersects the power line L2. For example, if the substrate 3 is a multilayer substrate, the signal line L1 may be wired on the upper surface of the layer and the power line L2 may be wired on the lower surface of the same layer. In addition, the signal line L1 may be routed around the power line L2 so as not to overlap with the power line L2 in this place. Moreover, the signal line L1 may be comprised by the jumper wire (jumper wire) in the said location, for example.

DESCRIPTION OF SYMBOLS 100 Lighting device 101 Illuminating device 1 Light source part 11 Light emitting element 2 Power supply part 21 Input part 22 Rectification part 23 Conversion part 24 Control part 3 Board | substrate L1 Signal line L2 Power line

Claims (3)

An annularly formed substrate;
A power supply unit that receives AC power from an external AC power supply and supplies lighting power to a light source unit having a light emitting element;
The power supply unit is
An input unit electrically connected to the AC power source;
A rectifying unit that rectifies AC power supplied from the AC power source;
A conversion unit for converting the output power of the rectification unit into predetermined DC power;
A control unit for controlling the conversion unit,
The substrate is provided with the input unit, the rectification unit, the conversion unit, and the control unit in order in the direction along the circumferential direction,
A signal line formed on the substrate and through which a control signal supplied from the control unit to the conversion unit flows;
The lighting device, wherein the signal line is wired so that the control signal flows in a direction opposite to the direction. A power line formed on the substrate and electrically connecting each of the input unit, the rectification unit, and the conversion unit;
The lighting device according to claim 1, wherein the power line is wired inward of the signal line in a radial direction of the substrate. The lighting device according to claim 1 or 2, and the light source unit,
The light source unit is provided in a region different from a region in which the power source unit is provided in the substrate.

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