Light source unit and lighting fixture

Abstract

To attain uniformity of light distribution characteristics while improving reception sensitivity of radio signals.SOLUTION: A light source unit B1 includes a light source module, a power supply device, a mounting plate 3, and a communication device 4. The light source module is mounted on a front surface of the mounting plate 3, and the power supply device is mounted on a rear surface of the mounting plate. The communication device 4 includes: a reception part 40 receiving radio signals using infrared ray as a medium; a circuit board 42 mounting the reception part 40; and a case 43 housing the circuit board 42. The mounting plate 3 includes a through hole 32 penetrating from the front surface to the rear surface to make the radio signals pass through. The through hole 32 is formed at a position not overlapping with the light source module 1 when seen from the thickness direction of the mounting board 3. The case 43 has an opening part 44 facing the through hole 32 along the thickness direction of the mounting board 3, and houses the circuit board 42 in a standing state so as to make the reception part 40 face to the through hole 32 via the opening part 44.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a light source unit and a lighting fixture, and more particularly to a light source unit that receives a wireless signal and operates in response to the wireless signal, and a lighting fixture that includes the light source unit. [Background technology]

[0002] As a conventional example, the light source unit described in Patent Document 1 is exemplified. The light source unit described in Patent Document 1 (hereinafter referred to as the conventional example) includes a light receiver having a light receiving surface for receiving a signal from a remote controller, a light source module, a power supply device for turning on the light source module, an attachment plate, and a light-transmitting cover.

[0003] The light source module is configured by mounting a plurality of light-emitting elements (e.g., LEDs) on one surface of a rectangular substrate. The light source module is attached to a first mounting surface of a mounting plate. The power supply device and the light receiver are attached to a second mounting surface of the mounting plate, which is the surface opposite the first mounting surface. A light-transmitting cover is attached to the mounting plate so as to cover the first mounting surface.

[0004] An opening window is formed in the mounting plate. The opening window penetrates from the first mounting surface to the second mounting surface of the mounting plate. An opening hole is formed in the substrate. The light receiving surface of the light receiver faces the light-transmitting cover through the opening window in the mounting plate and the opening hole in the substrate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-152120 Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional example, the opening formed in the substrate is formed between the light-emitting elements mounted on the substrate. Therefore, the distance between two adjacent light-emitting elements on either side of the opening is limited by the size of the opening. Furthermore, if the opening is made smaller, the sensitivity of the receiver to receive infrared signals (wireless signals) may decrease.

[0007] Therefore, in the conventional configuration, it may be difficult to uniformly space the plurality of light-emitting elements and achieve uniform light distribution characteristics while suppressing a decrease in the receiving sensitivity of infrared signals (wireless signals).

[0008] An object of the present disclosure is to provide a light source unit and a lighting fixture that can improve the reception sensitivity of wireless signals while achieving uniform light distribution characteristics. [Means for solving the problem]

[0009] A light source unit according to one aspect of the present disclosure includes a light source module having a plurality of light-emitting elements and a substrate on which the plurality of light-emitting elements are mounted, and a power supply device that supplies current to the plurality of light-emitting elements to cause them to emit light. The light source unit includes a mounting plate to which the light source module is attached on its front surface and the power supply device on its back surface, and a communication device that receives a wireless signal and transmits control information contained in the wireless signal to the power supply device. The power supply device is configured to adjust the supply of current in accordance with the control information. The mounting plate has a through-hole that penetrates from its front surface to its back surface and allows the wireless signal to pass through. The through-hole is located at a position that does not overlap with the light source module when viewed from the thickness direction of the mounting plate. The communication device includes a receiver that receives the wireless signal using infrared light as a medium, a circuit board on which the receiver is mounted, and a case that houses the circuit board. The case has an opening that faces the through-hole along the thickness direction of the mounting plate, and houses the circuit board in an upright position so that the receiver faces the through-hole through the opening.

[0010] A lighting fixture according to one aspect of the present disclosure includes a light source unit and a fixture body that supports the light source unit. [Effects of the Invention]

[0011] The light source unit and lighting fixture of the present disclosure have the advantage of being able to improve the reception sensitivity of wireless signals while achieving uniform light distribution characteristics. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the lighting fixture and the light source unit according to the first embodiment of the present disclosure. [Figure 3] FIG. 3 is a circuit block diagram of the light source unit of the above embodiment. [Figure 4] FIG. 4 is a perspective view of a communication device in the light source unit. [Figure 5] FIG. 5 is a partial cross-sectional view of the light source unit. [Figure 6] FIG. 6 is a cross-sectional view of the light source unit of the same, with a portion thereof omitted. [Figure 7] FIG. 7 is a front view of the main part of the light source unit. [Figure 8] FIG. 8 is an explanatory diagram for explaining an installation state of the lighting fixture of the same. [Figure 9] FIG. 9 is a cross-sectional view of a light source unit according to the second embodiment of the present disclosure, with a portion thereof omitted. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a light source unit and a lighting device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each diagram described in the following embodiments is a schematic diagram, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0014] (1) Embodiment 1 (1-1) Lighting equipment As shown in FIGS. 1 and 2 , lighting fixture A1 according to embodiment 1 of the present disclosure (hereinafter simply referred to as lighting fixture A1) includes a light source unit B1 according to embodiment 1 of the present disclosure (hereinafter simply referred to as light source unit B1) and a fixture body 6. The light source unit B1 is detachably attached to the fixture body 6, which is directly attached to a ceiling. However, the fixture body 6 may be embedded in the ceiling, or may be directly attached to a wall or embedded in the wall.

[0015] The fixture main body 6 includes a rectangular box-shaped storage compartment 60 with an open bottom, a pair of reflectors 61 protruding obliquely upward from both longitudinal edges of the storage compartment 60, and a pair of end plates 62 provided at both longitudinal ends of the storage compartment 60 and the pair of reflectors 61 (see FIG. 2). The fixture main body 6 is installed on a ceiling by inserting hanging bolts (not shown) into at least two of a plurality of mounting holes 63 provided on the bottom surface of the storage compartment 60 and tightening nuts (not shown) onto the hanging bolts. A power cord is inserted into one of a plurality of power supply holes 64 provided on the bottom surface of the storage compartment 60. The power cord inserted into the power supply hole 64 is electrically connected to a terminal block 65 attached to the inner bottom surface of the storage compartment 60. Three electric wires 66 extend from the terminal block 65. The ends of the three electric wires 66 are electrically connected to a male power connector 67.

[0016] (1-2) Light source unit As shown in FIG. 2, the light source unit B1 includes a light source module 1, a power supply device 2, a mounting plate 3, a communication device 4, and a cover 5.

[0017] (1-2-1) Light source module The light source module 1 has a number of LEDs (Light Emitting Diodes) 10 and a substrate 11. The LEDs 10, which are light-emitting elements, are, for example, packaged white LEDs for lighting. However, the light-emitting elements are not limited to LEDs, and may be organic electroluminescence elements, semiconductor laser elements, or the like.

[0018] The substrate 11 is formed in a long rectangular shape. However, the substrate 11 may be formed by connecting a plurality of substrates in the longitudinal direction. The LEDs 10 are mounted in a single row at equal intervals along the longitudinal direction of the substrate 11 at the center of the short side on the surface (bottom surface) of the substrate 11 (see FIG. 2). The LEDs 10 are electrically connected in series or in series-parallel by printed wiring formed on the surface of the substrate 11.

[0019] (1-2-2) Mounting plate The mounting plate 3 is made of a metal plate and has a long, rectangular shape. The mounting plate 3 has a long, rectangular bottom plate 30 and a pair of side plates 31 that rise upward from both ends of the bottom plate 30 along the longitudinal direction. The light source module 1 is attached to the surface (underside) of the bottom plate 30 by a plurality of claws (not shown) cut and raised from the bottom plate 30. The width of the bottom plate 30 in the short side direction is greater than the width of the substrate 11 in the short side direction (see FIG. 2).

[0020] Furthermore, a circular through-hole 32 is provided in the bottom plate 30 (see FIG. 2). This through-hole 32 is provided in a portion of the bottom plate 30 outside the light source module 1 (a position adjacent to the substrate 11 along the short side direction of the substrate 11). In other words, the through-hole 32 is provided in a position that does not overlap with the light source module 1 when viewed in the thickness direction of the bottom plate 30.

[0021] (1-2-3) Cover The cover 5 is formed in a semi-cylindrical shape from a translucent synthetic resin such as acrylic resin or polycarbonate resin. The cover 5 also has a pair of protruding walls 50 that protrude upward along the longitudinal direction. The cover 5 accommodates the mounting plate 3 between the pair of protruding walls 50, and is attached to the mounting plate 3 by hooking the hook portions formed on the tips (upper ends) of the pair of protruding walls 50 onto the tips (upper ends) of the pair of side plates 31 of the mounting plate 3.

[0022] (1-2-4) Power supply device 2, the power supply device 2 has a lighting circuit 20 and a power supply case 21 that houses the lighting circuit 20. The lighting circuit 20 is composed of a printed circuit on which various electronic components including integrated circuits and a female power connector 23 are mounted on a rectangular printed circuit board 22. The power connector 23 is electrically and mechanically connected to the power connector 67.

[0023] The power supply case 21 is made of a metal plate and is formed into a long rectangular box shape with one surface (bottom surface) open. The power supply case 21 houses the lighting circuit 20 and is fixed to the mounting plate 3 with the open surface facing the back surface (top surface) of the bottom plate 30. Note that the power supply case 21 is electrically connected to the mounting plate 3 when fixed to the mounting plate 3. Furthermore, the mounting plate 3 is electrically connected to the fixture body 6 when the light source unit B1 is attached to the fixture body 6. Therefore, the power supply case 21 of the power supply device 2 is electrically connected to the fixture body 6 through the mounting plate 3.

[0024] 3, the lighting circuit 20 is supplied with AC power from a commercial power system 9 through a power connector 23. The lighting circuit 20 has a power conversion circuit 200, a constant current circuit 201, a control circuit 202, a control power supply circuit 203, a pair of output terminals 204 and 205, a signal terminal 206, a control power supply terminal 207, and a ground terminal 208. One output terminal 204 is electrically connected to the positive electrode of the light source module 1, and the other output terminal 205 is electrically connected to the negative electrode of the light source module 1.

[0025] The power conversion circuit 200 is configured to convert AC power supplied from the power grid 9 into DC power. The power conversion circuit 200 preferably includes, for example, a full-wave rectifier circuit, a power factor correction circuit (a step-up chopper circuit), a buck converter (a step-down chopper circuit), etc. Alternatively, the power conversion circuit 200 may be configured with a full-wave rectifier circuit and a converter circuit. The converter circuit includes a single-stage converter (also called a one-converter) capable of performing voltage conversion and power factor correction in parallel. Specifically, the converter circuit preferably includes a SEPIC (Single Ended Primary Inductance Converter) type DC / DC converter circuit.

[0026] The constant current circuit 201 is configured to make the DC current supplied from the power conversion circuit 200 to the light source module 1 via a pair of output terminals 204 and 205 coincide with a target value.

[0027] The control circuit 202 includes a microcontroller as a main component. The control circuit 202 is configured to switch between operating and stopping the power conversion circuit 200 and the constant current circuit 201 in accordance with control information received from the communication device 4, and to change the target value of the DC current (load current) in the constant current circuit 201.

[0028] The control circuit 202 receives a PWM (Pulse Width Modulation) signal from the communication device 4 via the signal terminal 206 and the ground terminal 208. The PWM signal transmits control information by changing the duty ratio of a rectangular wave signal with a constant period. For example, control information is transmitted to set the target value of the load current to zero when the duty ratio is between 95% and 100%. Control information is also transmitted to set the target value of the load current to the rated current value of the light source module 1 when the duty ratio is 5% or less. Furthermore, control information is transmitted to set the target value of the load current to a corresponding value in the range of 5% to 100% of the rated current value of the light source module 1 when the duty ratio is any value in the range of 95% to 5%.

[0029] The control power supply circuit 203 is configured to generate a control power supply voltage from the DC output of the power conversion circuit 200. The control power supply circuit 203 is configured to generate a control power supply voltage (for example, a DC voltage of about 5 V to 3.3 V) from the output voltage of the power conversion circuit 200. The control power supply circuit 203 applies the generated control power supply voltage to a control power supply terminal 207 and a ground terminal 208, and supplies it to the communication device 4 via two electric wires 46.

[0030] (1-2-5) Communication equipment (1-2-5-1) Circuit configuration of communication device The communication device 4 has a receiving unit 40 and a signal circuit unit 41, and is configured to receive a wireless signal (infrared signal) transmitted from a remote controller 7 (see FIG. 2) and acquire control information. The infrared signal transmitted from the remote controller 7 complies with the standard defined by the Association for Electric Home Appliances, known as the KAHEI format. In the KAHEI format, the infrared signal has a wavelength peak value of 900 to 950 nm, and a carrier wave consisting of a square wave with a duty ratio of 50% and a frequency of 33 kHz or more and 40 kHz or less is pulse position modulated.

[0031] The receiving unit 40 has two light receiving elements (for example, photodiodes or phototransistors) for receiving infrared rays (infrared light). The receiving unit 40 is configured to waveform-shape the output signal of each light receiving element, amplify it, and output it. In other words, the receiving unit 40 has the function of converting a radio signal (infrared signal) into an electrical signal and outputting it. In the following description, the electrical signal output from the receiving unit 40 will be referred to as a received signal.

[0032] The signal circuit unit 41 acquires control information by demodulating the received signal output by the receiver 40. The control information is information including each command, such as a turn-on command to turn on the light source unit B1, a turn-off command to turn off the light source unit B1, and a dimming command to specify the dimming ratio of the light source unit B1.

[0033] Furthermore, the signal circuit unit 41 converts the acquired control information (light-on command, light-off command, and dimming command) into a PWM signal. For example, when a light-on command is acquired, the signal circuit unit 41 converts it into a PWM signal with a duty ratio of 3%, and when a light-off command is acquired, the signal circuit unit 41 converts it into a PWM signal with a duty ratio of 100%. When a dimming command is acquired, the signal circuit unit 41 converts it into a PWM signal with a duty ratio corresponding to the dimming ratio instructed by the dimming command. The signal circuit unit 41 outputs the converted PWM signal to the signal terminal 206 and the ground terminal 208 of the lighting circuit 20. The receiving unit 40 and the signal circuit unit 41 operate on a control power supply voltage supplied from the control power supply circuit 203 of the lighting circuit 20.

[0034] (1-2-5-2) Structure of communication equipment As shown in Fig. 4, the communication device 4 has a circuit board 42 and a case 43. The circuit board 42 is formed in a rectangular shape. A receiving unit 40, a signal circuit unit 41, a signal connector 47, etc. are mounted on the surface of the circuit board 42. However, the signal circuit unit 41 is not shown in Fig. 4.

[0035] The receiving unit 40 has two light-receiving lenses 401 provided on one side of a rectangular parallelepiped package 400 (see FIGS. 4 and 5). Each light-receiving lens 401 is configured to focus an infrared signal (infrared light) on a light-receiving element, such as a photodiode or a phototransistor, housed in the package 400. The receiving unit 40 is mounted near one corner of the surface of the circuit board 42 so that the side of the package 400 on which the light-receiving lenses 401 are provided is perpendicular to the surface of the circuit board 42. However, the number of light-receiving lenses 401 provided in the receiving unit 40 is not limited to two, and may be three or more, or just one. Furthermore, when the circuit board 42 is housed in the case 43 with the surface of the circuit board 42 facing the bottom wall 430 of the case 43, the receiving unit 40 is mounted so that the side of the package 400 on which the light-receiving lenses 401 are provided is parallel to the surface of the circuit board 42.

[0036] The signal connector 47 is mounted on the surface of the circuit board 42 at a position diagonal to the receiving unit 40. The ends of three electric wires 46, i.e., an electric wire for a control signal, an electric wire for a control power supply, and an electric wire for ground, are electrically connected to the signal connector 47 (see FIG. 4).

[0037] (1-2-5-3) Case The up / down, left / right, and front / rear directions indicated by arrows in FIG. 4 are defined as the up / down, left / right, and front / rear directions of the communication device 4, respectively.

[0038] As shown in Fig. 4, the case 43 has a bottom wall 430, a front wall 431, a rear wall 432, side walls 433, and a top wall 434, and is formed in a box shape with an open left side. However, the upper part of the front wall 431 of the case 43 is inclined upward toward the rear wall 432 (see Fig. 4). The case 43 also has a pair of support pieces 435 that sandwich and support both longitudinal ends of the circuit board 42 between the case 43 and the rear wall 432. The pair of support pieces 435 are formed integrally with the bottom wall 430 and the top wall 434, one protruding from each wall. The case 43 is preferably formed as a synthetic resin molded body made of a synthetic resin material such as polycarbonate resin.

[0039] A circular opening 44 is formed at the rear end of the right end of the bottom wall 430. The opening 44 penetrates the bottom wall 430 in the vertical direction and faces the two light receiving lenses 401 of the receiver 40 mounted on the circuit board 42 in the vertical direction (see FIGS. 4 and 5). A peripheral wall 45 is formed at the rear end of the right end of the lower surface of the bottom wall 430. The peripheral wall 45 is formed in a cylindrical shape so as to surround the periphery of the opening 44. In other words, the two light receiving lenses 401 of the receiver 40 face the outside of the case 43 through the opening 44 of the bottom wall 430 and the interior of the peripheral wall 45. Therefore, the receiver 40 can receive infrared signals arriving from outside the case 43 with the two light receiving lenses 401 through the interior of the peripheral wall 45 and the opening 44.

[0040] Here, the opening 44 of the case 43 faces the through-hole 32 provided in the bottom plate 30 of the mounting plate 3 in the vertical direction (see FIG. 5). Therefore, by designing the opening 44 and the through-hole 32 to have optimal sizes, it is possible to ensure the communication distance required for the communication device 4 while reducing the possibility of receiving a wireless signal transmitted to another light source unit B1.

[0041] A wire-passing groove 4300 is formed at the left end of the lower wall 430. Furthermore, an L-shaped holding claw 4301 is formed near the wire-passing groove 4300 on the lower surface of the lower wall 430 (see FIG. 4). The holding claw 4301 holds three electric wires 46 that are drawn out of the case 43 from the wire-passing groove 4300. Plug connectors are connected to the tips of these three electric wires 46.

[0042] The case 43 has a pair of male coupling parts 436. Each of the pair of male coupling parts 436 is formed in an E shape. The pair of male coupling parts 436 are mechanically coupled to a pair of female coupling parts provided on the power supply case 21 (see FIG. 2). The pair of female coupling parts are provided on one side surface of the power supply case 21 in the longitudinal direction.

[0043] Thus, by coupling the pair of male coupling parts 436 to the pair of female coupling parts, the case 43 is disposed adjacent to the power supply case 21 in the longitudinal direction of the power supply case 21 (see FIG. 6). The three electric wires 46 of the communication device 4 are electrically connected to the signal terminal 206, the control power supply terminal 207, and the ground terminal 208 of the lighting circuit 20 by connecting plug connectors to receptacle connectors mounted on the printed circuit board 22 of the power supply device 2 (see FIG. 3).

[0044] (1-3) Features of the light source unit One feature of the light source unit B1 is that the mounting plate 3 has through-holes 32 that penetrate from the front to the back and allow wireless signals to pass through, and the through-holes 32 are provided at positions that do not overlap with the light source modules 1 when viewed from the thickness direction of the mounting plate 3 (see FIG. 7). For example, if the through-holes are provided at positions that overlap with the light source modules 1, holes will be provided in the substrate 11 at positions that overlap with the through-holes, and the pitch of the LEDs 10 will become partially larger near the holes. As a result, there is a risk that the uniformity of the light distribution characteristics of the light source module will decrease.

[0045] In contrast, the light source unit B1 can reduce the possibility of erroneously receiving a wireless signal (infrared signal) transmitted to another light source unit (while improving the reception sensitivity of the wireless signal), while achieving uniformity in the light distribution characteristics of the light source module 1.

[0046] Furthermore, the light source unit B1 has an opening 44 provided in the case 43 of the communication device 4, and the receiver 40 receives the wireless signal (infrared signal) through the opening 44. For example, if the light receiving lens 401 of the receiver 40 is placed outside the case 43, the reception range of the wireless signal becomes too wide, and there is a risk that the receiver 40 may receive a wireless signal transmitted to another light source unit.

[0047] In contrast, the light source unit B1 can narrow the range in which the receiver 40 can receive the wireless signal (infrared signal) by having the receiver 40 receive the wireless signal (infrared signal) through the opening 44 of the case 43. As a result, the light source unit B1 can reduce the possibility of erroneously receiving a wireless signal (infrared signal) transmitted to another light source unit.

[0048] Furthermore, the opening 44 of the case 43 overlaps with the through-hole 32 of the mounting plate 3 along the thickness direction of the bottom plate 30 (see FIGS. 5 to 7). Therefore, a wireless signal (infrared signal) emitted from the remote controller 7 passes from the through-hole 32 of the mounting plate 3 through the opening 44 of the case 43 and is received by the receiver 40. For example, if the light-receiving lens 401 of the receiver 40 is located on the surface (underside) of the mounting plate 3 (bottom plate 30), the reception range for wireless signals becomes too wide, and there is a risk that a wireless signal transmitted to another light source unit may be received.

[0049] In contrast, the light source unit B1 can narrow the range in which the receiver 40 can receive the wireless signal (infrared signal) by having the receiver 40 receive the wireless signal (infrared signal) from the through-hole 32 of the mounting plate 3 through the opening 44 of the case 43. As a result, the light source unit B1 can reduce the possibility of erroneously receiving a wireless signal (infrared signal) transmitted to another light source unit.

[0050] Furthermore, in the light source unit B1, the case 43 has a cylindrical peripheral wall 45. The peripheral wall 45 protrudes from the case 43 so as to surround the periphery of an opening 44 in the surface of the case 43 (see FIGS. 4 and 5). It is preferable that the tip (lower end) of the peripheral wall 45 contacts the back surface (upper surface) of the bottom plate 30 or is close enough to not contact it (see FIG. 5). If the peripheral wall 45 is not provided, the possibility that a wireless signal (infrared signal) that passes through the through hole 32 in the bottom plate 30 will reach the opening 44 of the case 43 and be received by the receiver 40 decreases.

[0051] In contrast, in the light source unit B1, the peripheral wall 45 provided on the case 43 increases the likelihood that a wireless signal that passes through the through hole 32 in the bottom plate 30 will be reflected by the inner surface of the peripheral wall 45, reach the opening 44 in the case 43, and be received by the receiving unit 40.

[0052] Furthermore, the inner peripheral surface of the peripheral wall 45 is formed in a truncated cone shape with the inner diameter decreasing from the tip (bottom end) of the peripheral wall 45 toward the opening 44 (see FIG. 5). Since the inner peripheral surface of the peripheral wall 45 of the light source unit B1 is formed in a truncated cone shape, most of the wireless signals (infrared signals) that enter the interior of the peripheral wall 45 through the through-holes 32 can reach the opening 44 and be received by the receiver 40. In other words, the light source unit B1 can increase the receiving sensitivity of necessary wireless signals while preventing the reception of unnecessary wireless signals.

[0053] Let us consider an illuminated space E1 in which a number of lighting fixtures A1 are installed at equal intervals on the ceiling (see FIG. 8). This illuminated space E1 may be, for example, one floor of an office building, and the lighting fixtures A1 (light source units B1) are installed so that they are spaced equally apart both vertically and horizontally. The spacing between the lighting fixtures A1 in the vertical direction (the long side of the light source units B1) is denoted as P1, and the spacing between them in the horizontal direction (the short side of the light source units B1) is denoted as P2.

[0054] For example, if operator H1 operates remote controller 7 to turn on only one lighting fixture A1 directly above, it is desirable to reduce the likelihood that the wireless signal transmitted from the remote controller 7 will be received by an adjacent lighting fixture A1. In other words, the range over which the receiver 40 of each light source unit B1 can receive the wireless signal is preferably narrower than the sum of the longitudinal length of the light source unit B1 and twice the vertical spacing P1, and narrower than the sum of the lateral length of the light source unit B1 and twice the horizontal spacing P2. However, the reach of the wireless signal transmitted from the remote controller 7 is limited to, for example, an angle of 20 degrees from the tip of the remote controller 7 and a distance of 5 to 6 meters from the tip of the remote controller 7.

[0055] Therefore, by setting the size of the opening 44, the size of the through hole 32, and the size of the peripheral wall 45 (axial length and inner diameter) to appropriate values, the light source unit B1 can prevent the reception of unnecessary radio signals while increasing the reception sensitivity of necessary radio signals.

[0056] Another feature of the light source unit B1 is that the communication device 4 is disposed adjacent to the power supply device 2.

[0057] The smaller the difference between the frequency of the common mode noise flowing from the lighting circuit 20 of the power supply device 2 to the mounting plate 3 via the power supply case 21 and the carrier frequency (33 kHz to 40 kHz) of the wireless signal (infrared signal), the higher the possibility that the common mode noise will interfere with the wireless signal (received signal).If the common mode noise interferes with the wireless signal (received signal), the power supply device 2 is more likely to malfunction or become inoperable.

[0058] Thus, in the light source unit B1, the communication device 4 is disposed adjacent to the power supply device 2, so that the electric wire 46 electrically connecting the communication device 4 and the power supply device 2 can be shortened. In other words, by shortening the electric wire 46 electrically connecting the communication device 4 and the power supply device 2, the light source unit B1 can reduce the possibility of interference between the received signal and common mode noise. As a result, the light source unit B1 can improve the noise resistance (S / N ratio) of the wireless signal.

[0059] Furthermore, since the case 43 of the communication device 4 is attached to the power supply case 21 of the power supply device 2, the light source unit B1 can further shorten the electric wire 46 that electrically connects the communication device 4 and the power supply device 2. As a result, the light source unit B1 can further improve noise resistance in wireless signals.

[0060] Here, a power cable 8 for feed wiring may be arranged between one side plate 31 of the mounting plate 3 and the power supply device 2 (see FIG. 6). In the light source unit B1, the circuit board 42 is housed in the case 43 so as to be along the wall (rear wall 432 of the case 43) farther from the power cable 8. In other words, by separating the circuit board 42 of the communication device 4 from the power cable 8, the light source unit B1 can improve noise resistance in wireless signals.

[0061] (2) Embodiment 2 (2-1) Light source unit A light source unit B2 according to a second embodiment of the present disclosure (hereinafter simply referred to as light source unit B2) is configured so that a communication device 4 receives a wireless signal using radio waves as a medium. However, among the components of light source unit B2, components that are common to light source unit B1 are denoted by the same reference numerals and illustrations and descriptions thereof are omitted as appropriate.

[0062] As shown in FIG. 9, the communication device 4 in the light source unit B2 includes a wireless communication circuit 48 and a case 43 that houses the wireless communication circuit 48.

[0063] Wireless communication circuit 48 has a rectangular circuit board 480, a wireless communication module 481 mounted on the surface of circuit board 480, and an antenna 482 formed on the surface of circuit board 480 by a conductor (copper foil).

[0064] The wireless communication module 481 receives a wireless signal via the antenna 482, for example, a wireless signal carried by radio waves in the 920 MHz band, acquires control information from the wireless signal, converts the control information into a PWM signal, and transmits the converted PWM signal to the lighting circuit 20 via the electric wire 46.

[0065] The case 43 has almost the same configuration as the case 43 of the light source unit B1 according to embodiment 1, except that it does not have the opening 44 and the peripheral wall 45. In other words, since the case 43 is made of a material (synthetic resin) that transmits radio waves, it is not necessary to provide the opening 44 and the peripheral wall 45, unlike an infrared signal.

[0066] On the other hand, since the mounting plate 3 facing the communication device 4 is made of metal, it needs a through-hole 33 for passing a wireless signal borne by radio waves. The through-hole 33 is formed in a rectangular shape. The through-hole 33 is disposed in a position facing the antenna 482 along the thickness direction of the bottom plate 30, but not overlapping with the light source module 1. However, the through-hole 33 may also be disposed in a position not facing the antenna 482 along the thickness direction of the bottom plate 30, but not overlapping with the light source module 1.

[0067] Therefore, in the light source unit B2, the through hole 33 is provided in a position along the thickness direction of the mounting plate 3 (bottom plate 30) that does not overlap with the light source module 1, thereby improving the reception sensitivity of wireless signals while achieving uniform light distribution characteristics.

[0068] (3) Summary A light source unit (B1; B2) according to a first aspect of the present disclosure includes a light source module (1), a power supply device (2), a mounting plate (3), and a communication device (4). The light source module (1) has a plurality of light-emitting elements (LEDs 10) and a substrate (11) on which the plurality of light-emitting elements are mounted. The power supply device (2) supplies current to the plurality of light-emitting elements to cause them to emit light. The mounting plate (3) has the light source module (1) attached to its front surface and the power supply device (2) attached to its back surface. The communication device (4) receives a wireless signal and transmits control information contained in the wireless signal to the power supply device (2). The power supply device (2) is configured to adjust the supply of current in accordance with the control information. The mounting plate (3) has through-holes (32; 33) that penetrate from its front surface to its back surface and allow wireless signals to pass through. The through-holes (32; 33) are located at positions that do not overlap with the light source module (1) when viewed in the thickness direction of the mounting plate (3).

[0069] The light source unit (B1; B2) according to the first embodiment has through holes (32; 33) at positions that do not overlap with the light source module (1) when viewed from the thickness direction of the mounting plate (3), thereby improving the reception sensitivity of wireless signals while achieving uniform light distribution characteristics.

[0070] A light source unit (B1; B2) according to a second aspect of the present disclosure can be realized by combining it with the first aspect. In the light source unit (B1; B2) according to the second aspect, it is preferable that the mounting plate (3) and the substrate (11) are each formed to be elongated. It is preferable that the through holes (32; 33) are provided in a position adjacent to the substrate (11) along the short side direction of the mounting plate (3).

[0071] The light source unit (B1; B2) according to the second aspect has through holes (32; 33) provided at positions adjacent to the substrate (11) along the short side direction of the mounting plate (3), thereby enabling the mounting plate (3) to be made smaller in the longitudinal direction.

[0072] A light source unit (B1; B2) according to a third aspect of the present disclosure can be realized by combining it with the first or second aspect. In the light source unit (B1; B2) according to the third aspect, the communication device (4) is preferably configured to receive a wireless signal using an electromagnetic wave as a medium.

[0073] The light source unit (B1; B2) according to the third aspect allows the communication device (4) to be made smaller than when the communication device (4) receives a wireless signal using a medium other than electromagnetic waves (e.g., ultrasonic waves).

[0074] A light source unit (B1; B2) according to a fourth aspect of the present disclosure can be realized by combining it with the third aspect. In the light source unit (B1; B2) according to the fourth aspect, the communication device (4) preferably has a receiving unit (40) that receives a wireless signal using infrared light as a medium. The communication device (4) is preferably configured so that the receiving unit (40) faces the through-holes (32; 33) along the thickness direction of the mounting plate (3).

[0075] The light source unit (B1; B2) according to the fourth aspect can reduce the possibility of erroneously receiving a radio signal (infrared signal) transmitted to another light source unit by narrowing the range in which the receiving section (40) can receive a radio signal (infrared signal).

[0076] A light source unit (B1; B2) according to a fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the light source unit (B1; B2) according to the fifth aspect, the through holes (32; 33) are preferably formed in a circular shape.

[0077] In the light source unit (B1; B2) according to the fifth aspect, the through holes (32; 33) are formed in a circular shape, so that the directivity of the wireless signal at the receiver (40) can be made close to omnidirectional.

[0078] A light source unit (B1; B2) according to a sixth aspect of the present disclosure can be realized by combining it with any of the first to fifth aspects. The light source unit (B1; B2) according to the sixth aspect preferably includes a cover (5) that is translucent and is attached to the mounting plate (3) so as to cover the light source module (1).

[0079] The light source unit (B1; B2) according to the sixth aspect can irradiate the light emitted from the light source module (1) into the illumination space through the cover (5), and can receive a wireless signal through the cover (5) at the receiving unit (40).

[0080] A lighting fixture (A1) according to a seventh aspect of the present disclosure includes a light source unit (B1; B2) according to any one of the first to sixth aspects and a fixture body (6) that supports the light source unit (B1; B2).

[0081] The lighting fixture (A1) according to the seventh aspect can improve the reception sensitivity of wireless signals and can also achieve a more uniform light distribution characteristic. [Explanation of symbols]

[0082] A1 Lighting fixture B1, B2 light source units 1 Light Source Module 2 Power supply 3 Mounting plate 4. Communications equipment 10 LEDs (light-emitting elements) 11 Circuit Board 32 Through hole 33 Through hole

Claims

1. a light source module having a plurality of light emitting elements and a substrate on which the plurality of light emitting elements are mounted; a power supply device that supplies current to the plurality of light-emitting elements to cause them to emit light; a mounting plate on which the light source module is mounted on a front surface and the power supply device is mounted on a rear surface; a communication device that receives a wireless signal and transmits control information included in the wireless signal to the power supply device; Equipped with the power supply device is configured to adjust the supply of current in response to the control information; the mounting plate has a through-hole that penetrates from the front surface to the back surface and allows the wireless signal to pass through; the through hole is provided at a position not overlapping with the light source module when viewed from a thickness direction of the mounting plate, the communication device includes a receiver that receives the wireless signal using infrared rays as a medium, a circuit board on which the receiver is mounted, and a case that houses the circuit board; the case has an opening facing the through hole along the thickness direction of the mounting plate, and accommodates the circuit board in an upright state so that the receiving unit faces the through hole via the opening. Light source unit.

2. The mounting plate and the substrate are each formed to be elongated, The through hole is provided at a position adjacent to the substrate along the short-side direction of the mounting plate. The light source unit according to claim 1 .

3. The through hole is formed in a circular shape.

3. The light source unit according to claim 1.

4. a cover that is translucent and attached to the mounting plate so as to cover the light source module; The light source unit according to any one of claims 1 to 3.

5. A light source unit according to any one of claims 1 to 4; a fixture body that supports the light source unit; Equipped with Lighting fixtures.

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