JP2024083499A - Light source unit and luminaire - Google Patents

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

This disclosure relates to a light source unit and a lighting fixture, and more specifically to a light source unit equipped with a wireless module, and a lighting fixture equipped with the light source unit.

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 circuit), 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 on the surface of the lighting fixture body (i.e., the surface on the same side as the light source) at one end in the longitudinal direction (i.e., a location that has little effect on the light emission of the light source). The light emission control circuit is a circuit that controls the light emission state of the light source in response 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.

JP 2018-185934 A

In the lighting fixture described in Patent Document 1, the first wireless communication device is placed on the surface of the lighting fixture body (i.e., the surface on the same side as the light source). In this case, however, the placement location of the first wireless communication device is limited to a location that has little effect on the light emission of the light source. For this reason, the cable between the first wireless device and the power source or light emission control circuit may become long, and the cable may be affected by external noise, which may reduce the receiving sensitivity of the first wireless device.

This disclosure has been made in consideration of the above problems, and aims to provide a light source unit and lighting fixture that can improve the freedom of placement of the wireless module while ensuring the reception sensitivity of the wireless module.

A light source unit according to one aspect of the present disclosure includes a metal frame, a light source board, 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 board is disposed on the first surface. A light source is provided on the light source board. 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 of the metal frame that corresponds to the antenna. The wireless module is disposed next to the lighting device. The lighting device includes a power conversion unit. The power conversion unit controls the power supply to the light source board. The wireless module includes a control unit. The control unit controls the lighting state of the light source board by controlling the power conversion unit in response to the control signal received from a remote control device.

A lighting device according to one aspect of the present disclosure includes a light source unit according to one aspect described above and a device body that supports the light source unit.

The present disclosure has the effect of improving the freedom of placement of wireless modules while ensuring the reception sensitivity of the wireless modules.

FIG. 1 is a perspective view of a lighting fixture according to an embodiment. FIG. 2 is a block diagram of the above lighting fixture. FIG. 3 is an exploded perspective view of the light source unit and the lighting fixture according to the embodiment. FIG. 4 is a plan view of a wireless module provided in the light source unit. FIG. 5 is a perspective view, with some parts omitted, showing a mounting portion of the wireless module in the light source unit. FIG. 6 is a partially omitted plan view showing a mounting portion of the wireless module in the light source unit. 7A and 7B are diagrams illustrating electric field distribution characteristics of the wireless module and a state in which an electric field is generated in a slit provided in the light source unit of the wireless module, respectively. FIG. 8 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to the first modified example. FIG. 9 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to the second modification. FIG. 10 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to the third modification. FIG. 11 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to the fourth modified example. FIG. 12 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to the modified example 4. As shown in FIG. FIG. 13 is a plan view, with some parts omitted, showing a mounting portion of an LED board in a light source unit according to a modification of Modification 5. FIG. FIG. 14 is a plan view, with some parts omitted, showing a mounting portion of a wireless module in a light source unit according to the sixth modified example. FIG. 15 is a plan view, with some parts omitted, showing a mounting portion of a wireless module in a light source unit according to the seventh modification. FIG. 16 is a block diagram of a lighting fixture according to the eighth modification. FIG. 17 is a block diagram of a lighting fixture according to the ninth modification.

(Embodiment)
Hereinafter, the light source unit according to the embodiment of the present disclosure and the lighting device according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure 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 configuration described in the following embodiment is merely one example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

As shown in FIG. 1, the lighting fixture 3 of this embodiment is a lighting fixture that is installed on the ceiling or the like in a room to illuminate the room, and 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 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 device 6 for remote control.

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

The remote control device 6 is a device that receives operations from the user (e.g., operations to turn on, turn off, and dim the light) and controls the lighting state (on, off, and dim the light) of the light source unit 2 by wireless signals in accordance with the received operations. The remote control device 6 may be fixed to a predetermined position, such as a wall of a room, or may be a terminal device that can be freely carried around.

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 unit that accepts operations by the user. The wireless module 63 is a device that performs wireless communication with the light source unit 2 (more specifically, the wireless module 50 described below) using radio waves in a predetermined frequency band (e.g., 920 MHz band) as a medium. The control unit 62 generates a control signal that controls the lighting state of the light source unit 2 in response to an 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 in response 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 the remote control device 6 using a wireless signal.

The fixture body 4 supports the light source unit 2 while being directly attached to the ceiling. As shown in FIG. 3, the fixture body 4 includes a storage section 40, a pair of reflectors 41, and a pair of end plates 42. The storage section 40 is a rectangular box with an open bottom. The pair of reflectors 41 protrude diagonally upward from both opening edges along the longitudinal direction of the storage section 40. The pair of end plates 42 are provided at both longitudinal ends of the storage section 40 and the pair of reflectors 41.

The fixture body 4 is installed on the ceiling by inserting hanging bolts (not shown) into at least two of the multiple mounting holes 400 provided on the bottom surface of the storage section 40 and tightening nuts (not shown) onto the hanging bolts. The fixture body 4 supports the light source unit 2 by mounting the light source unit 2 in the storage section 40. In this supported state, a power line from the AC power source B1 is inserted into one of the multiple power supply holes 401 provided on the bottom surface of the storage section 40. The power supply line inserted into the power supply hole 401 is electrically connected to the lighting device 1 in the light source unit 2 via the terminal block.

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

The LED module 22 includes a number of LEDs 220 (light sources), a board 221 (light source board), and a relay connector 223. The board 221 is formed in a long rectangular plate shape. The many LEDs 220 are mounted in a row at equal intervals along the longitudinal direction of the board 221 at the center of the short side on the underside of the board 221. The relay connector 223 is mounted on the board 221 of each LED module 22 at the end on the side where 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 board 221 of the right LED module 22 at the end opposite the side where the relay connector 223 is mounted (the right end).

The mounting member 21 is a metal frame formed into a long rectangular gutter shape using metal plates. 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 hooks onto the storage portion 40 of the device main body 4. The slit 212 is a portion that functions as a non-powered antenna that relays 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.

The two LED modules 22 are attached to the underside (first surface) of the bottom plate 210 by multiple claws cut out from the bottom plate 210, with their relay connectors 223 electrically connected to each other. That is, a large number of LEDs 220 are arranged on the underside of the bottom plate 210 via a substrate. The input connector 222 of the LED module 22 is electrically connected to the output connector of the lighting device 1. The hooks 217 are provided at both longitudinal ends of the bottom plate 210.

The cover 23 is formed in a semi-cylindrical shape from a translucent synthetic resin 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 accommodates the mounting member 21 between the pair of protruding walls 233, and is attached to the mounting member 21 by hooking the hook portions formed on the tips (upper ends) of the pair of protruding walls 233 onto the tips (upper ends) of the pair of side plates 211 of the mounting member 21.

The light source unit 2 is supported by the fixture body 4 by fitting into the storage section 40 as the hook portion 217 (see FIG. 5) of the mounting member 21 hooks onto a predetermined location of the storage section 40 of the fixture body 4.

The lighting device 1 controls the lighting state of the LED module 22 in response to a control signal (a control signal from the remote control device 6) received by an antenna 53 (described later) of the wireless device 5. 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.

The lighting device 1 has 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 constitute 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 in the shape of a long rectangular box with one side (lower side) open. The case 18 houses the printed circuit board 19 and is fixed to the upper surface of the bottom plate 210 so that the open side faces the upper surface of the bottom plate 210. The case 18 is electrically connected to the mounting member 21 while being fixed to the mounting member 21. Furthermore, the mounting member 21 is electrically connected to the fixture body 4 while the light source unit 2 is attached to the fixture body 4. Therefore, the case 18 of the lighting device 1 is electrically connected to the fixture body 4 through the mounting member 21.

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 a printed circuit board 19. The control unit 15 controls the power conversion unit 16 in response to a control signal received from the remote control device 6 via the wireless device 5. The power conversion unit 16 controls the lighting state (on, off, and dimming) of the LED module 22 by controlling the power supply to the LED module 22 in response to the control of the control unit 15. This controls the lighting state of the LED 220.

More specifically, the power conversion unit 16 has an input unit 17a and an output unit 17b. The input unit 17a is a part to which the AC power source B1 is electrically connected, and in this embodiment, is configured, for example, by the above-mentioned terminal block. The output unit 16b is a part to which the LED module 22 (and therefore the LEDs 220) is electrically connected, and in this embodiment, is configured, for example, by the above-mentioned output connector.

If the control signal is a control signal instructing lighting, the control unit 15 controls the power conversion unit 16 to light the LED module 22. In response to this control, the power conversion unit 16 converts the AC power from the AC power source B1 into DC power, controls the current value of the converted DC power to a target current value, and supplies it to the LED module 22. This turns on the LED module 22. If the control signal is a control signal instructing turning off the light, 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. This turns off the LED module 22. If the control signal 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 target current value to a target current value corresponding to the dimming level specified by the control signal. This controls the LED module 22 to the dimming level specified by the control signal. Note that the dimming level is expressed as the ratio (%) of the average power per unit time supplied to the LED module 22 to the rated power, assuming that the light output of the LED module 22 when rated power is supplied is 100%.

The wireless device 5 is a device that receives radio waves including the above-mentioned 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 includes a circuit board 52, an antenna 53, and a communication circuit 54.

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 bottom 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, one half of the bottom surface of the circuit board 52, and the second region 52B is, for example, the other half of the bottom surface of the circuit board 52. The antenna 53 is patterned in the first region 52A. The conductor 55 is provided over the entire surface of the second region 52B (i.e., uniformly over substantially the entire second region 52B). The conductor 55 is electrically connected to the antenna 53.

The antenna 53 is a part that receives radio waves including the above-mentioned control signal from the remote control device 6. The antenna 53 receives radio waves in a predetermined frequency band (for example, 920 MHz band). As described above, the antenna 53 is provided in the first region 52A on the lower surface of the circuit board 52. The antenna 53 is patterned with an elongated conductor. The antenna 53 has, for example, a zigzag pattern. More specifically, the antenna 53 is folded back alternately at both ends of the short side of the first region 52A and deployed in the longitudinal direction of the first region 53A. The long side and short side directions of the first region 52A are mutually perpendicular. Hereinafter, the direction in which the antenna 53 is folded back alternately is also referred to as the folding direction T1, and the direction in which the antenna 53 is deployed is also referred to as the deployment direction T2.

The communication circuit 54 is electrically connected to the antenna 53. The communication circuit 54 is also 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 an area that overlaps with the second area 51B on the top surface of the circuit board 52 (i.e., the back side of the conductor 55).

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

In this embodiment, the mounting member 21 has hooks 217 at both ends in the longitudinal direction X for hooking onto the fixture body 4 (see FIG. 5). The lighting device 1 is fixed to a location close to one of the hooks 217 on both sides (the hook 217 on the right side of the page in the example of FIG. 5). The wireless module 50 is disposed on the upper surface of the mounting member 21 between the lighting device 1 and the right hook 217. This allows the wireless module 50 to be disposed in the empty space between the lighting device 1 and the hook 217.

The shielding cover 51 protects the wireless module 50 from external noise (electromagnetic waves) and prevents the electromagnetic waves generated by the wireless module 50 from diffusing to the outside. The shielding cover 51 is formed of a material that blocks electromagnetic waves (e.g., a metal plate such as a copper plate or an aluminum plate). The shielding cover 51 is formed, for example, in the shape of a rectangular box with one side (bottom side) open. The shielding cover 51 is fixed to the top surface (second surface) of the mounting member 21 so that the open side faces the top surface of the bottom plate 210 and covers the wireless module 50 from above. It is desirable that the shielding cover 51 be electrically connected to the mounting member 21 and thus grounded.

The positional relationship between the antenna 53 of the wireless module 50 and the slit 212 of the mounting member 21 will be described in detail with reference to Figures 6 and 7.

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 direction T1 of the antenna 53 is parallel to the transverse direction Y of the mounting member 21 (see Figures 4 and 6). In contrast, the slit 212 is provided in 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 with 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 of the wireless module 50 where the electric field distribution of the antenna 53 is concentrated. The electric field distribution of the antenna 53 is the distribution of the electric field generated by the antenna 53. The longitudinal direction X and transverse direction Y of the mounting member 21 are also the longitudinal direction and transverse direction of the upper surface (second surface) of the bottom plate 210 of the mounting member 21, respectively.

Figure 7A shows the electric field distribution of antenna 53 when antenna 53 has a zigzag pattern. As shown in Figure 7A, electric field concentration point S2 is the periphery of one end of antenna 53 in folding direction T1 (i.e., the folded portion on the conductor 55 side) in wireless module 50. The change in electric field distribution at electric field concentration point S2 is greater with the change in folding direction T1 than with the change in deployment direction T2 of antenna 53. Therefore, in the electric field generated by antenna 53, if the electric field component in deployment direction T2 is the first electric field component Ex and the electric field component in folding direction T1 is the second electric field component Ey, then at electric field concentration point S2, the second electric field component Ey is greater than the first electric field component Ex.

In this embodiment, the wireless module 50 is disposed on the upper surface of the bottom plate 210 of the mounting member 21 as shown in FIG. 6. In this arrangement, 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. As shown in FIG. 6, the slit 212 is provided so as to overlap the corresponding point S1 of the mounting member 21 when viewed from the front of the mounting member 21. The slit 212 also extends along a direction (longitudinal direction X in this embodiment) that intersects (e.g., perpendicular to) the larger of the electric field components Ex, Ey (see FIG. 7) at the electric field concentration point S2 (lateral direction Y in this embodiment) among the longitudinal direction X and lateral direction Y of the mounting member 21.

By providing the slit 212 in this manner, as shown in FIG. 7B, when the slit 212 receives radio waves from the remote control device 6, a main electric field E is generated in the width direction (short direction) of the slit 212. The main electric field is the electric field in the direction in which the electric field magnitude is greatest. This allows the slit 212 to effectively function as an unfed antenna that relays the radio waves received by the antenna 53. As a result, the antenna 53 can effectively receive radio waves from the remote control device 6 through the slit 212.

The length of the slit 212 (length in the longitudinal direction X) is preferably within the range of 0.5 x λ ± 0.3 x λ, where λ is the wavelength of the radio waves used in wireless communication with the remote control device 6. This allows the slit 212 to effectively receive radio waves and effectively radiate the received radio waves toward the antenna 53. As a result, the antenna 53 can receive radio waves from the remote control device 6 more effectively through the slit 212. There is no particular restriction on the width of the slit 212 (length in the transverse direction Y), but it is preferable that it is as small as possible from the standpoint of design and consideration of the passage of foreign objects.

In this embodiment, the slit 212 is provided in the mounting 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). This prevents the LED module 22 from interfering with radio wave reception at the slit 212.

As described above, according to the light source unit 2 and the lighting fixture 3, the wireless module 50 is provided on the upper surface of the mounting member 21 (i.e., the surface opposite the LED 220), so that the placement of the wireless module 50 can be prevented from affecting the light emission of the LED 220. This improves the degree of freedom in the placement location of the wireless module 50. In addition, the slit 212 is provided so as to overlap the corresponding portion S1 of the mounting member 21 that corresponds to the antenna 53 of the wireless module 50. By providing the slit 212 in this way, the slit 212 functions as a non-powered antenna that relays radio waves from the remote control device 6 to the antenna 53. Therefore, even if the wireless module 50 is provided on the upper surface of the mounting member 21, the reception sensitivity of the wireless module 50 can be ensured. As a result, the degree of freedom in the placement of the wireless module 50 can be improved while ensuring the reception sensitivity of the wireless module 50.

(Modification)
Modifications of the above embodiment will now be described. The following modifications may be implemented in combination.

(Variation 1)
In the above embodiment, the light source unit 2 may further include an insulating member 7 for blocking the slit 212, as shown in FIG. 8. The insulating member 7 is formed of an insulating material (e.g., synthetic resin, more specifically, e.g., polycarbonate resin, acrylic resin, or ABS resin). The insulating member 7 is formed, for example, in a sheet shape. In the example of FIG. 8, the insulating member 7 is provided on the lower surface (i.e., the surface on the same side as the LED 220) of the bottom plate 210 of the mounting member 21 so as to block the slit 212. This insulating member 7 can prevent foreign matter (such as dust or insects) from entering the mounting member 21 from the upper surface side to the lower surface side (i.e., the inside of the cover 23) through the slit 212.

The shape of the insulating member 7 is not limited to a sheet shape. The insulating member 7 may be provided on the upper surface of the bottom plate 210 of the mounting member 21. The insulating member 7 may be provided so as to fill the inside of the slit 212 so as to fill the slit 212. The insulating member 7 may be provided integrally 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 block the slit 212 when the cover 23 is attached to the mounting member 21.

(Variation 2)
In the above embodiment, as shown in Fig. 9, if 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 on the edge 221a of the substrate 221. The notch 224 is provided on the edge 221a of the substrate 221 at a location corresponding to the slit 212 (a location overlapping with the slit 212 when viewed from the illumination of the substrate 221). That is, the LED module 22 may have the notch 224 on the edge 221a of the substrate 221. This allows the slit 212 to effectively receive radio waves from the remote control device 6 by the notch 224.

(Variation 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 in a portion of the substrate 221 of the LED module 22 corresponding to the slit 212 (a portion overlapping the slit 212 when 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, so as to have the same shape and size as the slit 212 and completely overlap with it. By providing the slit 227 in the substrate 221 in this way, the slit 227 can suppress a decrease in the reception sensitivity of the slit 212 caused by the LED module 22.

(Variation 4)
In the above 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 of 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 folded back alternately at both ends of the short side of the slit 212 and deployed in the long side of the slit 212. The antenna 225 is not connected to a power source and functions as a non-powered antenna. The antenna 225 may be arranged so as to overlap the antenna 53 (first antenna) of the wireless module 50 when viewed from the front of the substrate 221.

In this modified example, radio waves from the remote control device 6 are relayed by the antenna 225 and the slit 212 and received by the antenna 53 of the wireless module 50. This allows the antenna 53 to effectively receive radio waves from the remote control device 6.

The antenna 225 may be crank-shaped 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 to the slit 212. The two straight portions 225a and 225b are disposed on both sides of the width direction of the slit 212 and are shifted 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 disposed so as to intersect (for example, perpendicular to) the slit 212. In this case, the antenna 225 also functions as a non-powered antenna that relays radio waves from the remote control device 6.

(Variation 5)
13, in the case where the LED module 22 covers the slit 212, a wiring pattern may not be provided at a portion of the substrate 221 of the LED module 22 that corresponds to the slit 212 (a portion that overlaps with the slit 212 when viewed from the front of the substrate 221). This makes it possible to prevent the wiring pattern of the substrate 221 from blocking radio waves from the remote control device 6. As a result, the antenna 53 of the wireless module 50 can effectively receive radio waves from the remote control device 6.

(Variation 6)
In the above embodiment, the slit 212 may be formed to be bent in a hat shape as shown in Fig. 14. In this case, the slit 212 has five straight line portions 212a, 212b, 212c, 212d, and 212e connected together. The three straight line portions 212a, 212c, and 212e are parallel to each other and to the longitudinal direction X of the mounting member 21. The three straight line 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 line portions 212a, 212c, and 212e, the straight line portions 212a and 212e are arranged at an edge portion on one side of the short side direction Y of the mounting member 21, and the remaining straight line portion 212c is arranged inside the straight line portions 212a and 212e in the short side direction Y of the mounting member 21. The straight line portion 212b is connected between the two straight line portions 212a and 212c, and extends in a direction intersecting (e.g., perpendicular to) the short side direction Y of the mounting member 21. The straight line portion 212d is connected between the two straight line portions 212c and 212e, and extends in a direction intersecting (e.g., perpendicular to) the short side direction Y of the mounting member 21.

The straight portion 212c is formed to be longer than the length of the deployment direction T2 (longitudinal direction X) of the antenna 53. The straight portion 212c of the slit 212 is arranged to overlap the portion S1 corresponding to the antenna 53. That is, the slit 212 is generally arranged at one edge of the mounting member 21 in the short direction Y, and only a portion of the slit 212 (the straight portion 212c) is pulled out to the inside of the mounting member 21 and corresponds to the antenna 53. This makes it possible to minimize the overlap of the portions of the slit 212 other than the straight portion 212c (particularly the straight portions 212a and 212e) with the LED module 22.

(Variation 7)
15 , the wireless module 50 may be disposed 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, a portion S1 of the mounting member 21 corresponding to the antenna 53 extends in the short-side direction Y of the mounting member 21, and therefore the slit 212 is provided along the short-side direction Y of the mounting member 21 so as to overlap with the portion S1.

(Variation 8)
In the above embodiment, the control unit 15 may be provided in a wireless module 50 as shown in Fig. 16. In this case, the control unit 15 is mounted on a circuit board 52 of the wireless module 50 instead of being mounted on the printed circuit board 19 of the lighting device 1.

(Variation 9)
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. In this case, the shielding cover 51 is omitted.

(summary)
The light source unit (2) of the first embodiment includes a metal frame (21), a light source board (221), a wireless module (50), and a lighting device (1). The metal frame (21) has a first surface (e.g., a lower surface) and a second surface (e.g., an upper surface) opposite to the first surface. The light source board (221) is disposed on the first surface. The light source board (221) is provided with a light source (220). 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 in the metal frame (21) so as to overlap a corresponding portion (S1) corresponding to the antenna (53).

According to this configuration, since the wireless module (50) is provided on the second surface (i.e., the surface opposite to the light source (220)) of the metal frame (21), it is possible to suppress the influence of the arrangement of the wireless module (50) on the light emission of the light source (220). Therefore, it is possible to improve the degree of freedom of the arrangement location of the wireless module (50). In addition, a slit (212) is provided in a corresponding portion (S1) of the metal frame (21) corresponding to the antenna (53) of the wireless module (50). By providing the slit (212) in 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 if 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, it is possible to improve the degree of freedom of the arrangement of the wireless module (50) while ensuring the reception sensitivity of the wireless module (50).

In the second embodiment, the light source unit (2) is the first embodiment, and the wavelength of the radio wave is λ. The length of the slit (212) is within the range of 0.5×λ±0.3×λ.

This configuration ensures good reception sensitivity for the wireless module (50).

In the third embodiment of the light source unit (2), in the first or second embodiment, the slit (212) extends in a direction that intersects with the longitudinal direction (X) or lateral direction (Y) of the second surface, whichever direction has the larger electric field component (Ex, Ey) at the electric field concentration point (S2) of the wireless module (50).

This configuration allows the slit (212) to effectively function as an antenna (53).

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

With this configuration, when the antenna (53) has a zigzag pattern, the slits (212) can be positioned in a location where radio waves can be received effectively.

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

With this configuration, the insulating member (7) can prevent foreign matter (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).

In the sixth aspect of the light source unit (2), in any one of the first to fifth aspects, the slit (212) is the first slit (212). A cutout portion (224) or a second slit (227) is provided at a location on the light source substrate (221) corresponding to the first slit (212). With this configuration, the cutout portion (224) or the second slit (227) can prevent 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.

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

With this configuration, the second antenna (225) can relay radio waves from the external device (6) to the slit (212) in the metal frame (21). As a result, the receiving sensitivity of the wireless module (50) can be improved.

In the eighth aspect of the light source unit (2), which is one of the first to seventh aspects, no wiring pattern is provided in the location of the light source substrate (221) that corresponds to the slit (212).

This configuration makes it possible to prevent the wiring pattern of the light source substrate (221) from interfering with radio wave reception at the slit (212). As a result, the reception sensitivity of the wireless module (50) can be improved.

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

This configuration allows the wireless module (50) to be placed away from the power source (B1). As a result, it is possible to prevent high voltage from being applied to the wireless module (50) unintentionally.

In the light source unit (2) of the tenth aspect, which is any one of the first to eighth aspects, the lighting device (1) is disposed on the second surface (e.g., the top surface) of the metal frame (21) and includes a power supply circuit (16) that supplies power to the light source (220). The wireless module (50) is provided in the power supply circuit (16).

With this configuration, the wireless module (50) can be configured as one unit with the power supply circuit (16). This eliminates the need to secure a new location for the wireless module (50).

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

According to this configuration, the shielding cover (51) can protect the wireless module (50) from external noise (electromagnetic waves) and can also prevent the electromagnetic waves generated by the wireless module (50) from diffusing to the outside.

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

This configuration makes it possible to provide a lighting fixture (3) that achieves the above-mentioned effects of the light source unit (2).

In the lighting fixture (3) of the thirteenth aspect, in the twelfth aspect, the metal frame (21) has a hook portion (217) that hooks onto the fixture body (4). The wireless module (50) is disposed between the lighting device (1) and the hook portion (217) in the longitudinal direction (X) of the metal frame (21).

With this configuration, the wireless module (50) can be placed in the space between the lighting device (1) and the hook portion (217) of the metal frame (21).

Reference Signs List 1 Lighting device 3 Lighting fixture 4 Fixture body 6 Remote control device (external device)
7 Insulating member 16 Power conversion section (power supply circuit)
17a Input section 21 Mounting member (metal frame)
51 Shielding cover 50 Wireless module 53 Antenna (first antenna)
212 Slit (first slit)
217 Hook portion 221 Board (light source board)
224 Notch 225 Antenna (second antenna)
227 Slit (second slit)
B1 AC power supply (power supply)
S1: Corresponding part S2: Electric field concentration part T1: Folding direction T2: Deployment direction X: Longitudinal direction of mounting member (longitudinal direction of second surface)
Y: Short side direction of the mounting member (short side direction of the second surface)

Claims (9)

a metal frame having a first surface and a second surface opposite the first surface;
a light source substrate disposed on the first surface and having a light source;
a wireless module having an antenna for receiving radio waves including a control signal from an external device;
a lighting device that is disposed on the second surface and controls a 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 in the metal frame so as to overlap a corresponding portion of the antenna,
The wireless module is disposed adjacent to the lighting device,
The lighting device includes a power conversion unit that controls power supply to the light source board,
The wireless module includes a control unit that controls the power conversion unit in response to the control signal received from a remote control device to control a lighting state of the light source board.
Light source unit. The lighting device includes:
an input section for inputting power from a power source;
a power supply circuit that supplies the power input from the input unit to the light source,
the input unit is disposed on one side of the second surface of the lighting device in a longitudinal direction,
The wireless module is disposed on the opposite side of the lighting device from the input unit.
The light source unit according to claim 1 . The wavelength of the radio wave is λ,
The length of the slit is within the range of 0.5×λ±0.3×λ.
The light source unit according to claim 1 . the slit extends in a direction intersecting one of a longitudinal direction and a transverse direction of the second surface, the direction in which an electric field component at an electric field concentration point of the wireless module is larger.
The light source unit according to any one of claims 1 to 3. Further comprising an insulating member that closes the slit.
The light source unit according to any one of claims 1 to 4. No wiring pattern is provided in a portion of the light source substrate corresponding to the slit.
The light source unit according to any one of claims 1 to 5. Further comprising a shielding cover for covering the wireless module.
The light source unit according to any one of claims 1 to 6. A light source unit according to any one of claims 1 to 7,
A fixture body supporting the light source unit.
lighting equipment. The metal frame has a hook portion that is hooked onto the tool body,
The wireless module is disposed between the lighting device and the hook portion in the longitudinal direction of the metal frame.
9. A lighting device according to claim 8.

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