Light source unit and lighting fixture

Abstract

To provide a light source unit that can improve a degree of freedom of arrangement of a radio module while securing receiving sensitivity of the radio module.SOLUTION: A light source unit 2 comprises a metal frame, a light source board, a radio module 50, and a lighting device 1. The light source board is arranged on a lower surface of the metal frame. The radio module 50 comprises an antenna 53. The lighting device 1 is arranged on an upper surface of the metal frame, and controls a lighting state of a light source in accordance with a control signal received by the antenna 53. The radio module 50 is arranged on the upper surface of the metal frame 21. The metal frame comprises a slit penetrating the upper surface and the lower surface. The slit is provided so as to overlap with a corresponding part corresponding to the antenna 53, in the metal frame. The radio module 50 comprises a control unit 15. The control unit 15 controls the lighting state of the light source board by controlling a power conversion unit 16 in accordance with the control signal received from a remote control device.SELECTED DRAWING: Figure 16

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 provided with a wireless module and a lighting fixture provided with the light source unit.

Background Art

[0002] The lighting fixture described in Patent Document 1 includes a lighting fixture body (metal frame), a light source, a first wireless communication device (wireless module), a light emission control circuit (control device), and a power source. The light source is provided on the surface of the lighting fixture body. The first wireless communication device is a device that receives a control signal wirelessly transmitted from the outside, and is provided at one end in the longitudinal direction (i.e., a location where the influence on the light emission of the light source is small) on the surface of the lighting fixture body (i.e., the same side as the light source). The light emission control circuit is a circuit that controls the light emission state of the light source according to the control signal received by the first wireless communication device, and is provided on the back surface of the lighting fixture body. The power source supplies operating current to the light source, the first wireless communication device, and the light emission control circuit, and is provided on the back surface of the lighting fixture body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting fixture described in Patent Document 1, the first wireless communication device is arranged on the surface of the lighting fixture body (i.e., the same side as the light source). However, in this case, the arrangement location of the first wireless communication device is limited to a location where the influence on the light emission of the light source is small. For this reason, the cable between the first wireless device and the power source or the light emission control circuit may become long, and the cable may be affected by external noise, and the reception sensitivity of the first wireless device may decrease.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a light source unit and a lighting fixture capable of improving the degree of freedom in arranging a wireless module while ensuring the reception sensitivity of the wireless module.

Means for Solving the Problems

[0006] A light source unit according to an aspect of the present disclosure includes a metal frame, a light source substrate, a wireless module, and a lighting device. The metal frame has a first surface and a second surface opposite to the first surface. The light source substrate is disposed on the first surface. A light source is provided on the light source substrate. The wireless module has an antenna for receiving radio waves including a control signal from an external device. The lighting device is disposed on the second surface and controls the lighting state of the light source in response to the control signal received by the antenna. The wireless module is disposed on the second surface. The metal frame has a slit penetrating between the first surface and the second surface. The slit is provided so as to overlap a corresponding portion corresponding to the antenna in the metal frame. The wireless module is disposed adjacent to the lighting device. The lighting device includes a power conversion unit. The power conversion unit controls the power supply to the light source substrate. The wireless module includes a control unit. The control unit controls the lighting state of the light source substrate by controlling the power conversion unit in response to the control signal received from a remote control device. The slit extends in a direction intersecting with the direction in which the electric field component at the electric field concentration location of the wireless module is larger, out of the longitudinal direction and the lateral direction of the second surface.

[0007] A lighting fixture according to an aspect of the present disclosure includes the light source unit according to the above aspect and a fixture body that supports the light source unit.

Effects of the Invention

[0008] The present disclosure has an effect that it is possible to improve the degree of freedom in arranging the wireless module while ensuring the reception sensitivity of the wireless module.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiment for Carrying Out the Invention

[0010] (Embodiment) Hereinafter, embodiments of a light source unit according to an embodiment of the present disclosure and a lighting fixture according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each drawing described in the embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. 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 can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0011] As shown in FIG. 1, the lighting fixture 3 of the present embodiment is a lighting fixture installed on the ceiling or the like of a room to illuminate the room, and is a lighting fixture that can be operated by a wireless signal from a remote control device 6. The lighting fixture 3 has a light source unit 2 and a fixture main body 4 that supports the light source unit 2. However, the light source unit 2 or the lighting fixture 3 may include a remote control remote control device 6.

[0012] The light source unit 2 is detachably attached to the fixture main body 4 directly attached to the ceiling. However, the fixture main body 4 may be embedded in the ceiling, or may be directly attached to the wall, or may be embedded in the wall.

[0013] The remote control device 6 is a device that receives the operations of the user (such as the operations of lighting, extinguishing, and dimming), and controls the lighting state (lighting, extinguishing, and dimming) of the light source unit 2 by a wireless signal according to the received operations. The remote control device 6 may be fixed at a predetermined position such as the wall of a room, or may be a terminal device that can be freely carried around.

[0014] As shown in FIG. 2, the remote control device 6 includes an operation unit 61, a control unit 62, and a wireless module 63. The operation unit 61 is a part that receives the operations of the user. The wireless module 63 is a device that performs wireless communication using radio waves in a predetermined frequency band (for example, the 920 MHz band) as a medium with the light source unit 2 (more specifically, the wireless module 50 described later). The control unit 62 generates a control signal for controlling the lighting state of the light source unit 2 according to the input operation to the operation unit 61, and wirelessly transmits the generated control signal from the wireless module 63 to the light source unit 2. The light source unit 2 switches the lighting state according to the control signal from the remote control device 6. In this way, the lighting state of the light source unit 2 is controlled by a wireless signal by the remote control device 6.

[0015] The fixture main body 4 supports the light source unit 2 in a state of being directly attached to the ceiling. As shown in FIG. 3, the fixture main body 4 includes a housing portion 40, a pair of reflecting plates 41, and a pair of end plates 42. The housing portion 40 has a rectangular box shape with an open bottom surface. The pair of reflecting plates 41 project obliquely upward from the open end edges on both sides along the longitudinal direction in the housing portion 40. The pair of end plates 42 are provided at both ends in the longitudinal direction of the housing portion 40 and the pair of reflecting plates 41.

[0016] The appliance body 4 is installed on the ceiling by inserting suspension bolts (not shown) into at least any two of the plurality of mounting holes 400 provided on the bottom surface of the housing portion 40 and tightening nuts (not shown) on these suspension bolts. The appliance body 4 supports the light source unit 2 by mounting the light source unit 2 on the housing portion 40. In this supported state, a power cord from the AC power supply B1 is inserted into any one of the plurality of power holes 401 provided on the bottom surface of the housing portion 40. The power cord inserted into the power hole 401 is electrically connected to the lighting device 1 in the light source unit 2 via a terminal block.

[0017] The light source unit 2 is a device that emits light for illumination. The light source unit 2 is supported by the appliance body 4 by being mounted on the housing portion 40 of the appliance body 4. As shown in FIG. 3, the light source unit 2 includes a lighting device 1, two LED modules 22 that are lit by the lighting device 1, a mounting member 21 (metal frame), a cover 23, and a wireless device 5.

[0018] The LED module 22 includes a number of LEDs 220 (light sources), a substrate 221 (light source substrate), and a relay connector 223. The substrate 221 is formed in a long rectangular plate shape. A number of LEDs 220 are mounted in a row at equal intervals along the longitudinal direction of the substrate 221 at the center in the short side direction on the lower surface of the substrate 221. The relay connector 223 is mounted on the substrate 221 of each LED module 22 at the end on the side where the two LED modules 22 are adjacent to each other along the longitudinal direction. An input connector 222 is mounted on one LED module 22 (the right LED module 22 in FIG. 3). The input connector 222 is mounted on the substrate 221 of the right LED module 22 at the end (the right end) on the side opposite to the side where the relay connector 223 is mounted.

[0019] The mounting member 21 is a metal frame formed in a long, angular gutter shape from a metal plate. The mounting member 21 has a bottom plate 210, a pair of side plates 211, a hook portion 217 (see FIG. 5), and a slit 212. The bottom plate 210 is a long rectangular plate. The pair of side plates 211 rise upward from both ends along the longitudinal direction of the bottom plate 210. The hook portion 217 is a portion that catches on the housing portion 40 of the appliance body 4. The slit 212 is a portion that functions as a passive antenna for relaying radio waves from the remote control device 6. The slit 212 penetrates the bottom plate 210 in the thickness direction and extends along the longitudinal direction X.

[0020] The two LED modules 22 are attached to the lower surface (first surface) of the bottom plate 210 by a plurality of claws that are raised from the bottom plate 210 with their respective relay connectors 223 electrically connected to each other. That is, a large number of LEDs 220 are arranged on the lower surface of the bottom plate 210 via a substrate. Note that the input connector 222 of the LED module 22 is electrically connected to the output connector of the lighting device 1. The hook portion 217 is provided at both longitudinal ends of the bottom plate 210.

[0021] The cover 23 is formed in a semi-cylindrical shape from a synthetic resin having translucency, such as acrylic resin or polycarbonate resin. The cover 23 also has a pair of protruding walls 233 that protrude upward along the longitudinal direction. The cover 23 houses the mounting member 21 between the pair of protruding walls 233, and is attached to the mounting member 21 by hooking a hook portion formed at the tip (upper end) of the pair of protruding walls 233 onto the tips (upper ends) of the pair of side plates 211 of the mounting member 21.

[0022] The light source unit 2 is supported by the appliance body 4 so as to fit into the housing portion 40 when the hook portion 217 (see FIG. 5) of the mounting member 21 catches on a predetermined location of the housing portion 40 of the appliance body 4.

[0023] The lighting device 1 controls the lighting state of the LED module 22 according to a control signal (control signal from the remote control device 6) received by an antenna 53 of the wireless device 5 described later. The lighting device 1 is fixed to the upper surface (second surface) of the bottom plate 210 of the mounting member 21 of the light source unit 2.

[0024] The lighting device 1 includes a printed circuit board 19 and a case 18 that houses the printed circuit board 19. The printed circuit board 19 mounts various electronic components that make up the lighting device 1. The printed circuit board 19 is configured by mounting various electronic components including integrated circuits on a rectangular printed wiring board. The case 18 is formed of a metal plate into a long rectangular box shape with one surface (lower surface) open. The case 18 houses the printed circuit board 19 and is fixed to the upper surface of the bottom plate 210 with the opening surface facing the upper surface of the bottom plate 210. Note that the case 18 is electrically connected to the mounting member 21 in a state of being fixed to the mounting member 21. Further, the mounting member 21 is electrically connected to the appliance main body 4 in a state where the light source unit 2 is attached to the appliance main body 4. Therefore, the case 18 of the lighting device 1 is electrically connected to the appliance main body 4 through the mounting member 21.

[0025] The lighting device 1 includes a control unit 15 and a power conversion unit 16 (power supply circuit) (see FIG. 2). The control unit 15 and the power conversion unit 16 are mounted on the printed circuit board 19. The control unit 15 controls the power conversion unit 16 according to a control signal received from the remote control device 6 via the wireless device 5. The power conversion unit 16 controls the power supply to the LED module 22 according to the control of the control unit 15, thereby controlling the lighting state (lighting, extinguishing, and dimming) of the LED module 22. Thereby, the lighting state of the LED 220 is controlled.

[0026] More specifically, the power conversion unit 16 has an input unit 17a and an output unit 17b. The input unit 17a is a portion to which the AC power supply B1 is electrically connected, and in this embodiment, it is configured by, for example, the above terminal block. The output unit 16b is a portion to which the LED module 22 (and thus the LED 220) is electrically connected, and in this embodiment, it is configured by, for example, the above output connector.

[0027] When the control signal described above is a control signal instructing lighting, the control unit 15 controls the power conversion unit 16 to turn on the LED module 22. In response to this control, the power conversion unit 16 converts the AC power from the AC power supply B1 into DC power, controls the current value of the converted DC power to the target current value, and supplies it to the LED module 22. Thereby, the LED module 22 lights up. Also, when the control signal described above is a control signal instructing turning off, the control unit 15 controls the power conversion unit 16 to turn off the LED module 22. In response to this control, the power conversion unit 16 stops the power supply to the LED module 22. Thereby, the LED module 22 turns off. Further, when the control signal described above is a control signal instructing dimming, the control unit 15 controls the power conversion unit 16 to control the dimming of the LED module 22. In response to this control, the power conversion unit 16 controls the above target current value to the target current value corresponding to the dimming level specified by the above control signal. Thereby, the LED module 22 is controlled to the dimming level specified by the control signal. Note that the dimming level is represented by the ratio (%) of the average power per unit time supplied to the LED module 22 to the rated power when the light output of the LED module 22 when the rated power is supplied is set to 100%.

[0028] The wireless device 5 is a device that receives radio waves including the above control signal from the remote control device 6. As shown in FIG. 3, the wireless device 5 includes a wireless module 50 and a shielding cover 51. As shown in FIG. 4, the wireless module 50 has a circuit board 52, an antenna 53, and a communication circuit 54.

[0029] The circuit board 52 is a board on which the antenna 53 and the communication circuit 54 are mounted. The circuit board 52 is, for example, a substantially rectangular plate-shaped board. The lower surface of the circuit board 52 is divided into a first region 52A and a second region 52B. The first region 52A is, for example, a region of one half on one side of the lower surface of the circuit board 52, and the second region 52B is, for example, a region of one half on the opposite side of the lower surface of the circuit board 52. An antenna 53 is pattern-formed in the first region 52A. A conductor 55 is provided on the entire surface of the second region 52B (that is, uniformly over substantially the entire second region 52B). The conductor 55 is electrically connected to the antenna 53.

[0030] The antenna 53 is a part that receives radio waves including the above control signal from the remote control device 6. The antenna 53 receives radio waves in a predetermined frequency band (for example, the 920 MHz band). The antenna 53 is provided in the first region 52A on the lower surface of the circuit board 52 as described above. The antenna 53 is pattern-formed by an elongated conductor. The antenna 53 has, for example, a zigzag pattern. More specifically, the antenna 53 is alternately folded back at both ends in the short side direction of the first region 52A and is extended in the long side direction of the first region 53A. Note that the long side direction and the short side direction of the first region 52A are orthogonal to each other. Hereinafter, the direction in which the antenna 53 is alternately folded back is also referred to as the folding-back direction T1, and the direction in which the antenna 53 is extended is also referred to as the extending direction T2.

[0031] The communication circuit 54 is electrically connected to the antenna 53. Further, the communication circuit 54 is electrically connected to the lighting device 1 via a signal cable. The communication circuit 54 extracts a control signal from the radio waves received by the antenna 53 and outputs the extracted control signal to the lighting device 1. The communication circuit 54 is mounted in a region overlapping the second region 51B on the upper surface of the circuit board 52 (that is, on the back side of the conductor 55).

[0032] As shown in FIG. 5, the wireless module 50 is fixed to the upper surface (second surface) of the bottom plate 210 of the attachment member 21. In this fixed state, the antenna 53 of the wireless module 50 faces the upper surface of the attachment member 21. Further, the wireless module 50 is arranged adjacent to the lighting device 1 in the longitudinal direction X of the attachment member 21. More specifically, the input portion 17a of the lighting device 1 is arranged on one end side (left side in the example of FIG. 5) in the longitudinal direction X of the attachment member 21 in the lighting device 1. The wireless module 50 is arranged adjacent to the side opposite to the input portion 17a in the lighting device 1 (right side in the example of FIG. 5). Thereby, the wireless module 50 is arranged at a location away from the AC power supply B1. Also, in this arrangement state, the antenna 53 of the wireless module 50 is arranged near the slit 212 of the attachment member 21.

[0033] In the present embodiment, engaging portions 217 for engaging with the appliance main body 4 are provided at both ends in the longitudinal direction X of the attachment member 21 (see FIG. 5). The lighting device 1 is fixed at a location close to one of the engaging portions 217 on both sides (the engaging portion 217 on the right side of the paper surface in the example of FIG. 5). The wireless module 50 is arranged between the lighting device 1 and the above-described right engaging portion 217 on the upper surface of the attachment member 21. Thereby, the wireless module 50 can be arranged by utilizing the empty space between the lighting device 1 and the engaging portion 217.

[0034] The shielding cover 51 protects the wireless module 50 from external noise (electromagnetic waves) and suppresses the diffusion of electromagnetic waves generated from the wireless module 50 to the outside. The shielding cover 51 is formed of a material that blocks electromagnetic waves (for example, a metal plate such as a copper plate or an aluminum plate). The shielding cover 51 is formed, for example, in a rectangular box shape with one surface (lower surface) open. The shielding cover 51 is fixed to the upper surface (second surface) of the attachment member 21 so as to cover the wireless module 50 from above with the opening surface facing the upper surface of the bottom plate 210. It is desirable that the shielding cover 51 be grounded by being electrically connected to the attachment member 21.

[0035] Referring to FIGS. 6 and 7, the arrangement relationship between the antenna 53 of the wireless module 50 and the slit 212 of the mounting member 21 will be described in detail.

[0036] In this embodiment, the deployment direction T2 of the antenna 53 is parallel to the longitudinal direction X of the mounting member 21, and the folding-back direction T1 of the antenna 53 is parallel to the short-side direction Y of the mounting member 21 (see FIGS. 4 and 6). In contrast, the slit 212 is provided on the bottom plate 210 of the mounting member 21 so as to overlap the corresponding portion S1 corresponding to the antenna 53 and extend in the longitudinal direction X of the mounting member 21. The corresponding portion S1 is a portion of the mounting member 21 that overlaps the electric field concentration portion S2 of the wireless module 50 when viewed from the front of the mounting member 21. The electric field concentration portion S2 is a portion where the electric field distribution of the antenna 53 in the wireless module 50 is concentrated. The electric field distribution of the antenna 53 is the distribution of the electric field generated by the antenna 53. Note that the longitudinal direction X and the short-side direction Y of the mounting member 21 are also the longitudinal direction and the short-side direction of the upper surface (second surface) of the bottom plate 210 of the mounting member 21, respectively.

[0037] FIG. 7A shows the electric field distribution of the antenna 53 when the antenna 53 has a zigzag pattern. As shown in FIG. 7A, the electric field concentration portion S2 is around one end of the folding-back direction T1 in the antenna 53 (that is, the folding-back portion on the conductor 55 side) in the wireless module 50. The change in the electric field distribution at the electric field concentration portion S2 is greater in the folding-back direction T1 than in the change in the deployment direction T2 of the antenna 53. Therefore, in the electric field generated by the antenna 53, if the electric field component in the deployment direction T2 is defined as the first electric field component Ex and the electric field component in the folding-back direction T1 is defined as the second electric field component Ey, then at the electric field concentration portion S2, the second electric field component Ey is greater than the first electric field component Ex.

[0038] In this embodiment, as shown in FIG. 6, the wireless module 50 is disposed on the upper surface of the bottom plate 210 of the mounting member 21. In this disposed state, the electric field component Ex at the electric field concentration point S2 is parallel to the longitudinal direction X of the mounting member 21, and the electric field component Ey at the electric field concentration point S2 is parallel to the lateral direction Y of the mounting member 21. And as shown in FIG. 6, the slit 212 is provided so as to overlap the corresponding portion S1 of the mounting member 21 when viewed from the front of the mounting member 21. Further, the slit 212 extends along the direction (in this embodiment, the longitudinal direction X) that intersects (for example, is orthogonal to) the direction (in this embodiment, the lateral direction Y) in which the electric field components Ex and Ey (see FIG. 7) of the electric field at the electric field concentration point S2 are larger among the longitudinal direction X and the lateral direction Y of the mounting member 21.

[0039] By providing the slit 212 in this way, as shown in FIG. 7B, when the slit 212 receives the radio wave from the remote control device 6, a main electric field E is generated in the width direction (lateral direction) of the slit 212. The main electric field is the electric field in the direction where the magnitude of the electric field is the largest. Thereby, the slit 212 effectively functions as a passive antenna that relays the radio wave received by the antenna 53. As a result, the antenna 53 can effectively receive the radio wave from the remote control device 6 via the slit 212.

[0040] The length of the slit 212 (the length in the longitudinal direction X) is desirably within the range of 0.5×λ±0.3×λ, where λ is the wavelength of the radio wave used for wireless communication with the remote control device 6. Thereby, the slit 212 can effectively receive the radio wave and effectively radiate the received radio wave to the antenna 53 side. As a result, the antenna 53 can more effectively receive the radio wave from the remote control device 6 via the slit 212. Note that the width of the slit 212 (the length in the lateral direction Y) is not particularly limited, but is preferably as small as possible in consideration of the design and the passage of foreign matters.

[0041] In this embodiment, the slit 212 is provided in the attachment member 21 at a position that does not overlap with the substrate 221 of the LED module 22 when viewed from the front of the LED module 22 (see Fig. 6). Thereby, it is possible to suppress the LED module 22 from interfering with the radio wave reception of the slit 212.

[0042] As described above, according to this light source unit 2 and the lighting fixture 3, since the wireless module 50 is provided on the upper surface of the attachment member 21 (that is, the surface opposite to the LED 220), it is possible to suppress the arrangement of the wireless module 50 from affecting the light emission of the LED 220. Therefore, the degree of freedom in the arrangement location of the wireless module 50 can be improved. Further, the slit 212 is provided so as to overlap with the corresponding portion S1 corresponding to the antenna 53 of the wireless module 50 in the attachment member 21. By providing the slit 212 in this way, the slit 212 functions as a passive antenna that relays the radio wave from the remote control device 6 to the antenna 53. Therefore, even when the wireless module 50 is provided on the upper surface of the attachment member 21, the reception sensitivity of the wireless module 50 can be ensured. As a result, the degree of freedom in the arrangement of the wireless module 50 can be improved while ensuring the reception sensitivity of the wireless module 50.

[0043] (Modification example) A modification example of the above embodiment will be described. The following modification examples may be implemented in combination.

[0044] (Modification example 1) In the above embodiment, as shown in Fig. 8, the light source unit 2 may further include an insulating member 7 for closing the slit 212. The insulating member 7 is formed of a material having insulating properties (for example, synthetic resin, and more specifically, for example, polycarbonate resin, acrylic resin, or ABS resin). The insulating member 7 is formed in a sheet shape, for example. In the example of Fig. 8, the insulating member 7 is provided on the lower surface of the bottom plate 210 of the attachment member 21 (that is, the surface on the same side as the LED 220) so as to close the slit 212. With this insulating member 7, it is possible to suppress foreign matters (such as dust or insects) from entering from the upper surface side to the lower surface side (that is, the inside of the cover 23) of the attachment member 21 through the slit 212.

[0045] Note that the shape of the insulating member 7 is not limited to a sheet shape. Further, the insulating member 7 may be provided on the upper surface of the bottom plate 210 of the mounting member 21. Further, the insulating member 7 may be provided so as to be filled inside the slit 212 so as to fill the slit 212. Further, the insulating member 7 may be integrally provided with the cover 23. In this case, the insulating member 7 may be provided so as to protrude from the cover 23 so as to close the slit 212 in a state where the cover 23 is attached to the mounting member 21.

[0046] (Modification 2) In the above embodiment, as shown in FIG. 9, when the edge 221a of the substrate 221 of the LED module 22 interferes with the slit 212, a notch 224 for avoiding the slit 212 may be provided in the edge 221a of the substrate 221. The notch 224 is provided at a location on the edge 221a of the substrate 221 corresponding to the slit 212 (the location overlapping the slit 212 as viewed from the illumination of the substrate 221). That is, the LED module 22 may have a notch 224 in the edge 221a of the substrate 221. Thereby, the radio wave from the remote control device 6 can be effectively received by the slit 212 by the notch 224.

[0047] (Modification 3) In the above embodiment, as shown in FIG. 10, when the LED module 22 covers the slit 212 (first slit), a slit 227 (second slit) may be provided at a location on the substrate 221 of the LED module 22 corresponding to the slit 212 (the location overlapping the slit 212 as viewed from the front of the substrate 221). That is, the LED module 22 may have a slit 227 in the substrate 221. The slit 227 is provided so as to expose the entire slit 212. The slit 227 may be provided, for example, to have the same shape and size as the slit 212 and to completely overlap. By providing the slit 227 in the substrate 221 in this way, the decrease in the reception sensitivity of the slit 212 due to the LED module 22 can be suppressed by the slit 227.

[0048] (Modification Example 4) In the above-described embodiment, as shown in FIG. 11, when the LED module 22 covers the slit 212, an antenna 225 (second antenna) may be provided at a location on the substrate 221 of the LED module 22 corresponding to the slit 212. That is, the LED module 22 may have the antenna 225 on the substrate 221. In the example of FIG. 11, the antenna 225 has a so-called zigzag pattern in which it is alternately folded back at both ends in the short side direction of the slit 212 and expanded in the longitudinal direction of the slit 212. The antenna 225 is not connected to a power source and functions as a passive antenna. The antenna 225 may be arranged so as to overlap with the antenna 53 (first antenna) of the wireless module 50 when viewed from the front of the substrate 221.

[0049] In this modification example, the radio wave from the remote control device 6 is relayed by the antenna 225 and the slit 212 and received by the antenna 53 of the wireless module 50. Therefore, the radio wave from the remote control device 6 can be effectively received by the antenna 53.

[0050] Note that the antenna 225 may have a crank shape as shown in FIG. 12. In this case, the antenna 225 has three straight portions 225a, 225b, and 225c connected together. The two straight portions 225a and 225c are parallel to each other and parallel to the slit 212. The two straight portions 225a and 225b are arranged on both sides in the width direction of the slit 212 and are displaced from each other in the longitudinal direction of the slit 212. The straight portion 225b is connected between the two straight portions 225a and 225c and is arranged so as to intersect (for example, be orthogonal to) the slit 212. The antenna 225 in this case also functions as a passive antenna that relays the radio wave from the remote control device 6.

[0051] (Modification Example 5) In the above-described embodiment, as shown in FIG. 13, when the LED module 22 covers the slit 212, wiring patterns may not be provided at locations on the substrate 221 of the LED module 22 corresponding to the slit 212 (locations overlapping the slit 212 when viewed from the front of the substrate 221). Thereby, it is possible to suppress the shielding of radio waves from the remote control device 6 by the wiring pattern on the substrate 221. As a result, radio waves from the remote control device 6 can be effectively received by the antenna 53 of the wireless module 50.

[0052] (Modification Example 6) In the above-described embodiment, as shown in FIG. 14, the slit 212 may be formed to bend in a hat shape. In this case, the slit 212 has five straight portions 212a, 212b, 212c, 212d, and 212e connected in one piece. The three straight portions 212a, 212c, and 212e are parallel to each other and parallel to the longitudinal direction X of the mounting member 21. The three straight portions 212a, 212c, and 212e are arranged offset from each other in the longitudinal direction X of the mounting member 21. Of the three straight portions 212a, 212c, and 212e, the straight portions 212a and 212e are arranged at an edge on one side in the lateral direction Y of the mounting member 21, and the remaining straight portion 212c is arranged inside the mounting member 21 in the lateral direction Y relative to the straight portions 212a and 212e. The straight portion 212b is connected between the two straight portions 212a and 212c and extends in a direction intersecting (for example, orthogonal to) the lateral direction Y of the mounting member 21. The straight portion 212d is connected between the two straight portions 212c and 212e and extends in a direction intersecting (for example, orthogonal to) the lateral direction Y of the mounting member 21.

[0053] The straight portion 212c is formed to be longer than the length of the antenna 53 in the deployment direction T2 (longitudinal direction X). The straight portion 212c of the slit 212 is arranged to overlap the location S1 corresponding to the antenna 53. That is, the slit 212 is generally arranged at the edge on one side in the short-side direction Y of the mounting member 21, and only a part (the straight portion 212c) of the slit 212 is drawn out to the inside of the mounting member 21 and made to correspond to the antenna 53. Thereby, portions other than the straight portion 212c of the slit 212 (particularly the straight portions 212a and 212e) can be prevented from overlapping the LED module 22 as much as possible.

[0054] (Modification Example 7) In the above-described embodiment, as shown in FIG. 15, the wireless module 50 may be arranged on the upper surface of the mounting member 21 such that the deployment direction T2 of the antenna 53 is parallel to the short-side direction Y of the mounting member 21 and the folding-back direction T1 of the antenna 53 is parallel to the longitudinal direction X of the mounting member 21. In this case, since the location S1 corresponding to the antenna 53 in the mounting member 21 extends in the short-side direction Y of the mounting member 21, the slit 212 is provided along the short-side direction Y of the mounting member 21 so as to overlap the location S1.

[0055] (Modification Example 8) In the above-described embodiment, as shown in FIG. 16, the control unit 15 may be provided in the wireless module 50. In this case, instead of being mounted on the printed circuit board 19 of the lighting device 1, the control unit 15 is mounted on the circuit board 52 of the wireless module 50.

[0056] (Modification Example 9) In the above-described embodiment, as shown in FIG. 17, the wireless module 50 may be provided in the lighting device 1. In this case, the antenna 53 and the communication circuit 54 of the wireless module 50 are mounted on the printed circuit board 19 of the lighting device 1 instead of being mounted on the circuit board 52. Also, in this case, the shielding cover 51 is omitted.

[0057] (Summary) The light source unit (2) of the first aspect includes a metal frame (21), a light source substrate (221), a wireless module (50), and a lighting device (1). The metal frame (21) has a first surface (for example, the lower surface) and a second surface (for example, the upper surface) opposite to the first surface. The light source substrate (221) is disposed on the first surface. A light source (220) is provided on the light source substrate (221). The wireless module (50) has an antenna (53) for receiving radio waves including a control signal from an external device (6). The lighting device (1) is disposed on the second surface and controls the lighting state of the light source (220) according to the control signal received by the antenna (53). The wireless module (50) is disposed on the second surface. The metal frame (21) has a slit (212) penetrating between the first surface and the second surface. The slit (212) is provided so as to overlap a corresponding portion (S1) corresponding to the antenna (53) in the metal frame (21).

[0058] According to this configuration, since the wireless module (50) is provided on the second surface of the metal frame (21) (that is, the surface opposite to the light source (220)), it is possible to suppress the arrangement of the wireless module (50) from affecting the light emission of the light source (220). Therefore, the degree of freedom in the arrangement location of the wireless module (50) can be improved. Further, a slit (212) is provided at a corresponding portion (S1) corresponding to the antenna (53) of the wireless module (50) in the metal frame (21). By providing the slit (212) at such a portion (S1), the slit (212) functions as a relay antenna that relays radio waves propagating from the external device (6) to the wireless module (50). Therefore, even when the wireless module (50) is provided on the second surface of the metal frame (21), the reception sensitivity of the wireless module (50) can be ensured. As a result, the degree of freedom in the arrangement of the wireless module (50) can be improved while ensuring the reception sensitivity of the wireless module (50).

[0059] In the second aspect of the light source unit (2), in the first aspect, let the wavelength of the radio wave be λ. The length of the slit (212) is within the range of 0.5×λ ± 0.3×λ.

[0060] According to this configuration, the reception sensitivity of the wireless module (50) can be ensured to be good reception sensitivity.

[0061] In the light source unit (2) of the third aspect, in the first or second aspect, the slit (212) is in the longitudinal direction (X) and the lateral direction (Y) of the second surface, and the electric field components (Ex, Ey) at the electric field concentration location (S2) of the wireless module (50) extend in a direction intersecting the direction in which the larger one is.

[0062] According to this configuration, the slit (212) can be effectively functioned as the antenna (53).

[0063] In the light source unit (2) of the fourth aspect, in any one of the first to third aspects, the antenna (53) has a zigzag pattern that is alternately folded back at both ends in a predetermined direction (T1) and unfolded in a direction (T2) intersecting the predetermined direction (T1). The periphery of one end portion of the antenna (53) in the predetermined direction (T1) is the electric field concentration location (S2) of the wireless module (50). The corresponding location (S1) is a location in the metal frame (21) that overlaps the electric field concentration location (S2) of the wireless module (50).

[0064] According to this configuration, when the antenna (53) has a zigzag pattern, the slit (212) can be arranged at a location where radio waves can be effectively received.

[0065] The light source unit (2) of the fifth aspect further includes an insulating member (7) that closes the slit (212) in any one of the first to fourth aspects.

[0066] According to this configuration, the insulating member (7) can suppress foreign matters (such as dust) from entering from the second surface side to the first surface side (i.e., the light source (220) side) through the slit (212).

[0067] In the light source unit (2) according to the sixth aspect, in any one of the first to fifth aspects, the slit (212) is defined as the first slit (212). A notch (224) or a second slit (227) is provided at a location on the light source substrate (221) corresponding to the first slit (212). According to this configuration, it is possible to suppress the light source substrate (221) from interfering with the radio wave reception of the slit (212). As a result, the reception sensitivity of the wireless module (50) can be improved.

[0068] In the light source unit (2) according to the seventh aspect, in any one of the first to fifth aspects, the antenna (53) is defined as the first antenna (53). The light source unit (2) further includes a second antenna (225) at a location on the light source substrate (221) corresponding to the slit (212).

[0069] According to this configuration, the second antenna (225) can relay the radio wave from the external device (6) to the slit (212) of the metal frame (21). As a result, the reception sensitivity of the wireless module (50) can be improved.

[0070] In the light source unit (2) according to the eighth aspect, in any one of the first to seventh aspects, no wiring pattern is provided at a location on the light source substrate (221) corresponding to the slit (212).

[0071] According to this configuration, it is possible to suppress the wiring pattern of the light source substrate (221) from interfering with the radio wave reception of the slit (212). As a result, the reception sensitivity of the wireless module (50) can be improved.

[0072] In the light source unit (2) according to the ninth aspect, in any one of the first to eighth aspects, the lighting device (1) includes an input unit (17a) and a power supply circuit (16). The input unit (17a) inputs electric power from a power supply (B1). The power supply circuit (16) supplies the electric power input from the input unit (17a) to the light source (220). The input unit (17a) is disposed at a portion on one side in the longitudinal direction (X) of the second surface in the lighting device (1). The wireless module (50) is disposed on the side opposite to the input unit (17a) in the lighting device (1).

[0073] According to this configuration, the wireless module (50) can be disposed at a location away from the power supply (B1). As a result, it is possible to suppress the application of a high voltage to the wireless module (50) contrary to intention.

[0074] In the light source unit (2) according to the tenth aspect, in any one of the first to eighth aspects, the lighting device (1) is disposed on the second surface (for example, the upper surface) of the metal frame (21) and includes a power supply circuit (16) that supplies electric power to the light source (220). The wireless module (50) is provided in the power supply circuit (16).

[0075] According to this configuration, the wireless module (50) can be configured integrally with the power supply circuit (16). Thereby, it is not necessary to newly secure a location for disposing the wireless module (50).

[0076] The light source unit (2) according to the eleventh aspect further includes a shielding cover (51) that covers the wireless module (50) in any one of the first to tenth aspects.

[0077] According to this configuration, the shielding cover (51) can protect the wireless module (50) from external noise (electromagnetic waves) and suppress the diffusion of electromagnetic waves generated from the wireless module (50) to the outside.

[0078] The lighting fixture (3) according to the twelfth aspect includes the light source unit (2) according to any one of the first to eleventh aspects and a fixture body (4) that supports the light source unit (2).

[0079] According to this configuration, it is possible to provide a lighting fixture (3) that exhibits the above-described effects of the light source unit (2).

[0080] In the lighting fixture (3) of the 13th aspect, in the 12th aspect, the metal frame (21) has a hooking portion (217) that catches on the fixture body (4). The wireless module (50) is disposed between the lighting device (1) and the hooking portion (217) in the longitudinal direction (X) of the metal frame (21).

[0081] According to this configuration, the wireless module (50) can be disposed by utilizing the empty space between the lighting device (1) and the hooking portion (217) of the metal frame (21).

Explanation of Reference Numerals

[0082] 1 Lighting device 3 Lighting fixture 4 Fixture body 6 Remote control device (external device) 7 Insulating member 16 Power conversion unit (power supply circuit) 17a Input portion 21 Mounting member (metal frame) 51 Shielding cover 50 Wireless module 53 Antenna (first antenna) 212 Slit (first slit) 217 Hooking portion 221 Substrate (light source substrate) 224 Notch 225 Antenna (second antenna) 227 Slit (second slit) B1 AC power supply (power supply) S1 Corresponding location S2 Electric field concentration location T1 Folding-back direction T2 Unfolding direction X Longitudinal direction of the mounting member (longitudinal direction of the second surface) Y Transverse direction of the mounting member (transverse direction of the second surface)

Claims

1. A metal frame having a first surface and a second surface opposite to the first surface; A light source substrate disposed on the first surface and provided with a light source; A wireless module having an antenna for receiving radio waves including a control signal from an external device; A lighting device disposed on the second surface and controlling the lighting state of the light source according to the control signal received by the antenna, comprising: The wireless module is disposed on the second surface; The metal frame has a slit penetrating between the first surface and the second surface; The slit is provided so as to overlap a corresponding portion corresponding to the antenna in the metal frame; The wireless module is disposed adjacent to the lighting device; The lighting device includes a power conversion unit for controlling power supply to the light source substrate; The wireless module includes a control unit for controlling the lighting state of the light source substrate by controlling the power conversion unit according to the control signal received from a remote control device; The slit extends in a direction intersecting with the direction in which the electric field component is larger at the electric field concentration location of the wireless module among the longitudinal direction and the lateral direction of the second surface; A light source unit.

2. The lighting device: An input unit for inputting power from a power source; A power supply circuit for supplying the power input from the input unit to the light source, having: The input unit is disposed at a portion on one side in the longitudinal direction of the second surface in the lighting device; The wireless module is disposed on the side opposite to the input unit in the lighting device; The light source unit according to Claim 1.

3. Let the wavelength of the radio wave be λ; The length of the slit is within a range of 0.5×λ ± 0.3×λ; The light source unit according to Claim 1 or 2.

4. Further comprising an insulating member for closing the slit; The light source unit according to any one of Claims 1 to 3.

5. At a location corresponding to the slit on the light source substrate, no wiring pattern is provided; The light source unit according to any one of Claims 1 to 4.

6. Further comprising a shielding cover for covering the wireless module; The light source unit according to any one of Claims 1 to 5.

7. The light source unit according to any one of Claims 1 to 6, And an appliance body for supporting the light source unit, comprising: A lighting fixture.

8. The metal frame has a hook portion for hooking on the appliance body; The wireless module is disposed between the lighting device and the hanging portion in the longitudinal direction of the metal frame. The lighting fixture according to claim 7.

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