Light source unit and lighting device

Abstract

To provide a light source unit which enables improvement of flexibility of arrangement of a wireless module while securing reception sensitivity of the wireless module.SOLUTION: A light source unit includes an attachment member 21, a substrate 221, a wireless module 50, and a lighting device. The substrate 221 is disposed on a lower surface of the attachment member 21. The substrate 221 is provided with LEDs 220. The wireless module 50 has an antenna 53 for receiving a control signal from a remote control device. The lighting device is disposed on an upper surface of the attachment member 21 and controls a lighting state of the LEDs 220 according to the control signal received by the antenna 53. A portion which overlaps with a part of the upper surface of the attachment member 21 and occupies a space between the upper surface and the lower surface is formed of an insulation member. The wireless module 50 is disposed so as to overlap with the insulation member on the upper surface of the attachment member 21. A slit 227 or a notch is provided at a facing portion S1, which corresponds to the wireless module 50, of the substrate 221.SELECTED DRAWING: Figure 8

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 including a wireless module, and a lighting fixture including the light source unit. [Background technology]

[0002] The lighting fixture described in Patent Document 1 includes a lighting fixture body (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 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. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-185934 A Summary of the Invention [Problem to be solved by the invention]

[0004] 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 the light emission control circuit may be long, and the cable may be affected by external noise, which may reduce the reception sensitivity of the first wireless device.

[0005] The present disclosure has been made in consideration of the above problems, and aims to provide a light source unit and a lighting device that can improve the freedom of positioning of a wireless module while ensuring the receiving sensitivity of the wireless module. [Means for solving the problem]

[0006] A light source unit according to an embodiment of the present disclosure includes a frame, a light source substrate, a wireless module, and a lighting device. The 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 according to the control signal received by the antenna. A portion of the frame that overlaps at least a part of the second surface and occupies a space between the first surface and the second surface is made of an insulating member having electrical insulation properties. The wireless module is disposed so as to overlap the insulating member on the second surface. A slit or a cutout is provided at a location of the light source substrate that faces the wireless module.

[0007] A lighting device according to one aspect of the present disclosure includes the light source unit according to the above aspect and a device body supporting the light source unit. Effect of the Invention

[0008] The present disclosure has an effect of improving the degree of freedom in arranging a wireless module while ensuring the reception sensitivity of the wireless module. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment. [Diagram 2] FIG. 2 is a block diagram of the above lighting fixture. [Diagram 3]FIG. 3 is an exploded perspective view of the light source unit and the lighting fixture according to the embodiment. [Figure 4] FIG. 4 is a plan view of a wireless module provided in the light source unit of the above embodiment. [Diagram 5] FIG. 5 is a perspective view, with some parts omitted, showing a mounting portion of the wireless module in the light source unit. [Figure 6] FIG. 6 is a partially omitted plan view showing a mounting portion of the wireless module in the light source unit of the above embodiment. [Figure 7] FIG. 7 is a plan view, with some parts omitted, showing a mounting portion of a wireless module in a light source unit according to the first modification. [Figure 8] FIG. 8 is a partially omitted plan view showing a mounting portion of an LED board in a light source unit according to Modification 2. As shown in FIG. [Figure 9] FIG. 9 is a diagram showing an electric field distribution characteristic of the wireless module of the above embodiment. [Figure 10] FIG. 10 is a partially omitted plan view showing a mounting portion of an LED board in a light source unit according to Modification 3. As shown in FIG. [Figure 11] FIG. 11 is a partially omitted plan view showing a mounting portion of an LED board in a light source unit according to the fourth modification. [Figure 12] 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 a modification of Modification 4. As shown in FIG. [Figure 13] 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. As shown in FIG. [Figure 14] 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 modification. [Figure 15] FIG. 15 is a block diagram of a lighting fixture according to the seventh modification. [Figure 16] FIG. 16 is a block diagram of a lighting fixture according to the eighth modification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment) Hereinafter, the light source unit 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.

[0011] 1, the lighting fixture 3 of this embodiment is a lighting fixture that is installed on a 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.

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

[0013] The remote control device 6 is a device that receives operations (e.g., operations to turn on, turn off, and dim) from a user and controls the lighting state (on, off, and dim) 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.

[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 unit that accepts operations by a 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 later) using radio waves of a predetermined frequency band (for example, 920 MHz band) as a medium. The control unit 62 generates a control signal for controlling 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.

[0015] The fixture body 4 supports the light source unit 2 in a state where it is directly attached to the ceiling. As shown in FIG. 3, the fixture body 4 includes a storage section 40, a pair of reflecting plates 41, and a pair of end plates 42. The storage section 40 is a rectangular box shape with an open bottom. The pair of reflecting plates 41 protrude obliquely upward from both opening edges along the longitudinal direction of the storage section 40. The pair of end plates 42 are provided at both ends of the storage section 40 and the pair of reflecting plates 41 in the longitudinal direction.

[0016] The fixture body 4 is installed on the ceiling by inserting suspension bolts (not shown) into at least any two of a plurality of mounting holes 400 provided on the bottom surface of the housing section 40 and tightening nuts (not shown) onto the suspension bolts. The fixture body 4 supports the light source unit 2 by mounting the light source unit 2 in the housing section 40. In this supported state, a power line from an AC power source B1 is inserted into any one of a plurality of power supply holes 401 provided on the bottom surface of the housing section 40. The power line inserted into the power supply 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 fixture body 4 by being attached to the housing portion 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, an attachment member 21 (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. The number of LEDs 220 are mounted in a row at equal intervals along the longitudinal direction of the substrate 221 at the center of the short side of the lower surface of the substrate 221. The relay connector 223 is mounted on the substrate 221 of each LED module 22 at an end portion 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 of the LED modules 22 (the LED module 22 on the right side in FIG. 3). The input connector 222 is mounted on the substrate 221 of the right LED module 22 at an end portion (the right end portion) opposite to the side where the relay connector 223 is mounted.

[0019] The mounting member 21 is formed in a long rectangular gutter shape by an insulating member (in other words, a dielectric member) 219 that is permeable to radio waves from the remote control device 6 and has electrical insulation properties. That is, the entire mounting member 21 is composed of the insulating member 219. The insulating member 219 is a member having insulating properties (in other words, dielectric properties), and is, for example, a resin member, specifically, for example, polycarbonate resin, acrylic resin, or ABS resin. The mounting member 21 has a bottom plate 210, a pair of side plates 211, and a hook portion 217 (see FIG. 5). 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 is hooked onto the storage portion 40 of the device main body 4.

[0020] The two LED modules 22 are attached to the lower surface (first surface) of the bottom plate 210 by a plurality of claws cut and raised 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 lower surface of the bottom plate 210 via a substrate. The input connector 222 of the LED module 22 is electrically connected to an output connector of the lighting device 1. The hook portions 217 are provided on 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 an acrylic resin or a 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.

[0022] The light source unit 2 is supported by the fixture body 4 such that the hook portion 217 (see FIG. 5) of the mounting member 21 is hooked onto a predetermined portion of the housing portion 40 of the fixture body 4 and the light source unit 2 fits into the housing portion 40 .

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

[0024] 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 in a state where it is fixed to the mounting member 21. Furthermore, the mounting member 21 is electrically connected to the fixture body 4 in a state where 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.

[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 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.

[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 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 portion 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.

[0027] When 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 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 the DC power to the LED module 22. This causes the LED module 22 to light up. When the control signal is a control signal instructing turning off the LED module 22, 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 causes the LED module 22 to turn off. When 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 causes the LED module 22 to be controlled to the dimming level specified by the control signal. 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 the rated power is supplied is 100%.

[0028] 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.

[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-like 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 half region on one side of the lower surface of the circuit board 52, and the second region 52B is, for example, a half region on the opposite side of the lower surface of the circuit board 52. The antenna 53 is patterned in the first region 52A. The second region 52B is provided with a conductor 55 over the entire surface (i.e., 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-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 by an elongated conductor. The antenna 53 has, for example, a zigzag pattern. More specifically, the antenna 53 is folded back alternately at both ends in the short-side direction of the first region 52A and deployed in the longitudinal direction of the first region 53A. The long-side direction and the short-side direction of the first region 52A are perpendicular to each other. Hereinafter, the direction in which the antenna 53 is folded back alternately will also be referred to as the folding direction T1, and the direction in which the antenna 53 is deployed will also be referred to as the deployment direction T2. 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 FIGS. 4 and 6). Note that 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.

[0031] 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 a region overlapping with the second region 51B on the top surface of the circuit board 52 (i.e., 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 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 unit 17a of the lighting device 1 is disposed on one end side of the mounting member 21 in the longitudinal direction X 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 of the input unit 17a of the lighting device 1 (the right side in the example of FIG. 5). As a result, the wireless module 50 is disposed at a location away from the AC power source B1.

[0033] In this embodiment, the mounting member 21 is provided at both ends in the longitudinal direction X with hooks 217 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 paper 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.

[0034] The shielding cover 51 protects the wireless module 50 from external noise (electromagnetic waves) and suppresses 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 (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 side (lower side) open. The shielding cover 51 is fixed to the upper surface (second surface) of the mounting member 21 so as to cover the wireless module 50 from above with the open side facing the upper surface of the bottom plate 210. It is desirable that the shielding cover 51 be electrically connected to the mounting member 21 and thus be grounded.

[0035] In this lighting fixture 3, radio waves transmitted from the remote control device 6 pass through the cover 23, the LED module 22, and the mounting member 21, and are received by the antenna 53 of the wireless module 50. At this time, because the mounting member 21 is made of an insulating member 219, the mounting member 21 is prevented from blocking the radio waves from the remote control device 6. Therefore, even if the wireless module 50 is placed on the upper surface of the mounting member 21, the receiving sensitivity of the wireless module 50 can be ensured.

[0036] 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 to the LED 220), so that the arrangement 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 arrangement location of the wireless module 50. In addition, since the entire mounting member 21 is made of the insulating member 219, even if the wireless module 50 is provided on the upper surface of the mounting member 21, it is possible to prevent the mounting member 21 from blocking the radio waves transmitted from the remote control device 6 to the wireless module 50. This ensures the reception sensitivity of the wireless module 50 even if the wireless module 50 is provided on the upper surface of the mounting member 21. 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.

[0037] Furthermore, since the entire mounting member 21 is made of the insulating member 219, the manufacturing process of the mounting member 21 can be simplified.

[0038] (Modification) Modifications of the above embodiment will now be described. The following modifications may be implemented in combination.

[0039] (Variation 1) In the above embodiment, the entire mounting member 21 is made of the insulating member 219. However, as shown in FIG. 7, only the part 21a of the mounting member 21 may be made of the insulating member 219, and the remaining part 21b may be made of metal. The part 21a of the mounting member 21 is a part that overlaps at least a part of the upper surface (second surface) of the mounting member 21, and is a part that occupies between the lower surface (first surface) and the upper surface of the mounting member 21. In the example of FIG. 7, the part 21a of the mounting member 21 is a part of the mounting member 21 between the lighting device 1 and the hook part 217 on the right side of the drawing. The part 21a of the mounting member 21 extends over a range larger than the planar dimensions of the wireless module 50. The part 21a and the remaining part 21b of the mounting member 21 may be connected to each other by a screw or may be connected to each other by a joint. The wireless module 50 is arranged so as to overlap the insulating member 219 on the upper surface of the mounting member 21. Like the above embodiment, this modification also ensures the reception sensitivity of the wireless module 50 and improves the degree of freedom in arranging the wireless module 50.

[0040] (Variation 2) 8, in the above embodiment, the substrate 221 of the LED module 22 has a slit 227 at a corresponding portion S1 corresponding to the wireless module 50. The corresponding portion S1 of the substrate 221 is a portion corresponding to the electric field concentration portion S2 of the wireless module 50 (in other words, a portion overlapping the electric field concentration portion S2 when viewed from the thickness direction of the LED module 22). That is, the slit 227 is provided at a portion of the LED module 22 corresponding to the electric field concentration portion S2.

[0041] The electric field concentration area S2 is an area 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. FIG. 9 shows the electric field distribution of the antenna 53 when the antenna 53 has a zigzag pattern. As shown in FIG. 9, the electric field concentration area S2 is a periphery of one end of the antenna 53 in the folding direction T1 (i.e., the folded portion on the conductor 55 side) in the wireless module 50. The change in the electric field distribution at the electric field concentration area S2 is larger in the folding direction T1 than in the unfolding direction T2 of the antenna 53. Therefore, in the electric field generated by the antenna 53, if the electric field component in the unfolding direction T2 is the first electric field component Ex and the electric field component in the folding direction T1 is the second electric field component Ey, the second electric field component Ey is larger than the first electric field component Ex at the electric field concentration area S2.

[0042] In this modification, the wireless module 50 is disposed on the upper surface of the bottom plate 210 of the mounting member 21 as shown in Fig. 8. In this disposition 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 (see Figs. 4 and 8). The slit 227 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 227 extends along a direction (longitudinal direction X in this embodiment) intersecting (for example, perpendicular to) the direction (lateral direction Y in this embodiment) of the electric field components Ex and Ey at the electric field concentration point S2, whichever is larger, of the longitudinal direction X and lateral direction Y of the mounting member 21 (see Figs. 8 and 9).

[0043] The length of slit 227 (length in longitudinal direction X) is desirably within the range of 0.5×λ±0.3×λ, where λ is the wavelength of the radio waves used in wireless communication with remote control device 6. There is no particular restriction on the width of slit 212 (length in transverse direction Y), but it is preferable that it is as small as possible from the standpoint of design and taking into consideration the passage of foreign matter.

[0044] In this manner, by providing the slits 227 in the LED module 22, it is possible to prevent the LED module 22 from blocking the radio waves from the remote control device 6. As a result, it is possible to improve the reception sensitivity of the wireless module 50.

[0045] (Variation 3) In the second modification, when the corresponding portion S1 of the LED module 22 corresponding to the wireless module 50 is the edge portion 221a of the substrate 221 of the LED module 22, a notch 224 may be provided in the edge portion 221a instead of the slit 227, as shown in FIG. 10. In this case, the notch 224 is provided so as to overlap (correspond to) the corresponding portion S1 of the substrate 221 corresponding to the wireless module 50 when viewed from the front of the mounting member 21. In addition, the length of the notch 224 (length in the longitudinal direction X) is preferably within a range of 0.5×λ±0.3×λ, where λ is the wavelength of the radio wave used in wireless communication with the remote control device 6. The notch 224 desirably extends along a direction (longitudinal direction X in this embodiment) intersecting (for example, perpendicular to) the direction (transverse direction Y in this embodiment) in which the electric field components Ex, Ey (see FIG. 9) of the electric field at the electric field concentration portion S2 are larger, between the longitudinal direction X and the transverse direction Y of the mounting member 21.

[0046] (Variation 4) In this modification, as shown in Fig. 11, in the above embodiment, an antenna 225 (second antenna) is provided at a corresponding portion S1 of the substrate 221 of the LED module 22 corresponding to the wireless module 50. The corresponding portion S1 of the substrate 221 is a portion corresponding to the electric field concentration portion S2 of the wireless module 50 (in other words, a portion overlapping the electric field concentration portion S2 when viewed from the thickness direction of the LED module 22). That is, the antenna 225 is provided at a portion corresponding to the electric field concentration portion S2 of the LED module 22. 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 of the short-side direction Y of the mounting member 21 and deployed in the long-side direction X of the mounting member 21. The antenna 225 is not connected to a power source and functions as a non-powered antenna.

[0047] In this modification, radio waves from the remote control device 6 are relayed by the antenna 225 and received by the antenna 53 of the wireless module 50. This allows the antenna 53 to receive the radio waves from the remote control device 6 effectively.

[0048] The antenna 225 may have a crank shape as shown in FIG. 12. In this case, the antenna 225 has three straight parts 225a, 225b, and 225c connected together. The two straight parts 225a and 225c are parallel to each other and parallel to the deployment direction T2 (see FIG. 9) of the antenna 53 of the wireless module 50. The two straight parts 225a and 225b are arranged so as to be shifted from each other in the folding back direction T1 (see FIG. 9) of the antenna 53. The straight part 225b is connected between the two straight parts 225a and 225c and arranged so as to intersect (for example, perpendicular to) the deployment direction T2 of the antenna 53. In this case, the antenna 225 also functions as a non-powered antenna that relays radio waves from the remote control device 6.

[0049] (Variation 5) 13, in the LED module 22 in the above embodiment, no wiring pattern is provided at a corresponding location S1 corresponding to the wireless module 50. 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 radio waves from the remote control device 6 can be effectively received by the antenna 53 of the wireless module 50.

[0050] (Variation 6) 14, in the above embodiment, the wireless module 50 is 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 direction T1 of the antenna 53 is parallel to the longitudinal direction X of the mounting member 21. In this case, the electric field concentration area S2 of the wireless module 50 extends in the short-side direction Y of the mounting member 21.

[0051] (Variation 7) 15, in this modification, the control unit 15 in the above embodiment is provided in a wireless module 50. 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.

[0052] (Variation 8) 16, in this modification, the wireless module 50 in the above embodiment is 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.

[0053] (summary) The light source unit (2) of the first embodiment includes a frame (21), a light source board (221), a wireless module (50), and a lighting device (1). The 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) in response to the control signal received by the antenna (53). A portion (e.g., 21a) of the frame (21) that overlaps at least a part of the second surface and occupies a space between the first surface and the second surface is made of an insulating member (219) having electrical insulation properties. The wireless module (50) is disposed so as to overlap the insulating member (219) on the second surface.

[0054] 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 frame (21), it is possible to suppress the placement of the wireless module (50) from affecting the light emission of the light source (220). This improves the degree of freedom in the placement location of the wireless module (50). In addition, a portion (e.g., 21a) of the frame (21) that overlaps at least a part of the second surface and occupies a space between the first surface and the second surface is made of the insulating member (219). Therefore, even if the wireless module (50) is provided on the second surface of the frame (21), it is possible to suppress the frame (21) from blocking radio waves transmitted from the external device (6) to the wireless module (50). This ensures the reception sensitivity of the wireless module (50) even if the wireless module (50) is provided on the second surface of the frame (21). As a result, it is possible to improve the degree of freedom in the placement of the wireless module (50) while ensuring the reception sensitivity of the wireless module (50).

[0055] In the light source unit (2) of the second embodiment, the entire frame (21) of the first embodiment is made of an insulating member (219).

[0056] According to this configuration, the entire frame (21) is made of the insulating member (219), so that the manufacturing process of the frame (21) can be simplified.

[0057] In the light source unit (2) of the third aspect, in the first or second aspect, a slit (227) or a notch (224) is provided in a corresponding portion (S1) of the light source substrate (221) that corresponds to the wireless module (50). With this configuration, the slit (227) or the notch (224) can prevent the light source substrate (221) from interfering with radio wave reception of the wireless module (50). As a result, the reception sensitivity of the wireless module (50) can be improved.

[0058] The light source unit (2) of the fourth embodiment is the same as that of the third embodiment, except that the wavelength of the radio wave is λ, and the length of the slit (227) or the notch (224) is within the range of 0.5×λ±0.3×λ.

[0059] This configuration ensures good reception sensitivity of the wireless module (50).

[0060] In the light source unit (2) of the fifth aspect, in the third or fourth aspect, the slit (227) or the cutout portion (224) extends in a direction intersecting one of the longitudinal direction (X) and the 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).

[0061] This configuration ensures good reception sensitivity of the wireless module (50).

[0062] In the light source unit (2) of the sixth aspect, in any one of the third to fifth aspects, the antenna (53) has a zigzag pattern in which it is alternately folded back at both ends in 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 an electric field concentration area (S2) of the wireless module (50). The slit (227) or the cutout portion (224) is provided in the thickness direction of the light source substrate (221) so as to overlap the electric field concentration area (S2) of the wireless module (50).

[0063] With this configuration, when the antenna 53 has a zigzag pattern, the slits 227 or notches 224 can be located at points where radio waves are concentrated.

[0064] In the light source unit (2) of the seventh aspect, in any one of the first to sixth aspects, the antenna (53) is a first antenna (53). The light source unit (2) further includes a second antenna (225) at a corresponding position (S1) of the light source board (221) corresponding to the wireless module (50).

[0065] According to this configuration, the second antenna (225) can relay radio waves from the external device (6) to the antenna (53) of the wireless module (50). As a result, the receiving sensitivity of the wireless module (50) can be improved.

[0066] In the light source unit (2) of the eighth aspect, in any one of the first to seventh aspects, no wiring pattern is provided in a corresponding portion (S1) of the light source substrate (221) corresponding to the wireless module (50).

[0067] This configuration can prevent the wiring pattern of the light source board (221) from interfering with radio wave reception of the wireless module (50), thereby improving the reception sensitivity of the wireless module (50).

[0068] 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 lighting device (1) to the input section (17a).

[0069] This configuration allows the wireless module (50) to be located away from the power source (B1), thereby preventing unintended application of a high voltage to the wireless module (50).

[0070] In the light source unit (2) of the tenth aspect, in any one of the first to ninth aspects, the lighting device (1) is provided with a power supply circuit (16) that is disposed on a second surface (e.g., an upper surface) of the frame (21) and supplies power to the light source (220). The wireless module (50) is provided in the power supply circuit (16).

[0071] According to this configuration, the wireless module (50) can be configured integrally with the power supply circuit (16), which eliminates the need to secure an additional location for the wireless module (50).

[0072] The light source unit (2) of an eleventh aspect is any one of the first to tenth aspects, and further includes a shielding cover (51) that covers the wireless module (50).

[0073] 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.

[0074] A lighting fixture (3) of a twelfth aspect includes 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).

[0075] According to this configuration, it is possible to provide a lighting fixture (3) that exhibits the above-mentioned effects of the light source unit (2).

[0076] In the lighting fixture (3) of the thirteenth aspect, in the twelfth aspect, the 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 frame (21).

[0077] According to this configuration, the wireless module (50) can be disposed in the space between the lighting device (1) and the hook portion (217) of the frame (21). [Explanation of symbols]

[0078] 1 Lighting device 3. Lighting equipment 4. Equipment body 6 Remote control device (external device) 7 Insulating materials 16 Power conversion section (power supply circuit) 17a Input section 21 Mounting material (frame) 51 Shielding cover 50 Wireless Module 53 Antenna (First Antenna) 217 Hook 219 Insulating materials 221 Substrate (light source substrate) 224 Notch 225 Antenna (Second Antenna) 227 Slit B1 AC power supply (power supply) S1 Corresponding Parts S2 Electric field concentration point T1 turning direction T2 development direction X Longitudinal direction of mounting material (longitudinal direction of second surface) Y Short side direction of mounting material (short side direction of second surface)

Claims

[Claim 1] a 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, a portion of the frame overlapping at least a part of the second surface and occupying a space between the first surface and the second surface is made of an insulating material having electrical insulation properties; the wireless module is disposed so as to overlap the insulating member on the second surface, a slit or a notch is provided at a position on the light source substrate that faces the wireless module; Light source unit.

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