Light source unit and lighting device

Abstract

To obtain a light source unit which can control a light receiving range of a light receiving element, and to obtain a lighting device.SOLUTION: A light source unit according to the present disclosure is held by a body attached to an installation object and includes: a support plate having one surface and the other surface opposite to the one surface; a light source module provided at the one surface side; and a light receiving element having a light receiving part configured to receive an infrared ray signal and provided at the other surface side while housed in a resin case. In the support plate, an opening through which the infrared ray signal passes is formed in a portion in which the light source module is not provided so as to penetrate through the one surface and the other surface. In the case, a case opening is provided at a portion between the light receiving part and the opening. The case has, in the periphery of the case opening, a cylindrical protruding part protruding to the outer side of the case.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a light source unit and a lighting fixture.

Background Art

[0002] Patent Document 1 discloses a light source unit including a light source part, a wireless communication part that performs wireless communication, and a holder that holds the light source part and the wireless communication part. The wireless communication part includes a housing case. The housing case includes a lid body and a case main body. Further, the wireless communication part mounts a light receiving element that receives infrared light. The light receiving element can receive an infrared signal through a through hole of the lid body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a light source unit such as that of Patent Document 1, when the light source part and the light receiving element are arranged on the same plane, a wide light receiving range of the light receiving element is ensured, and there is a risk that the light receiving performance may deteriorate due to the influence of external light or the like. Further, in facilities such as offices, a large number of lighting fixtures may be installed in the vicinity of each other. At this time, if the directivity of the light receiving element is not controlled, there is a risk that unintended lighting fixtures may be dimmed or set.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain a light source unit and a lighting fixture capable of controlling the light receiving range of a light receiving element.

Means for Solving the Problems

[0006] The light source unit according to the present disclosure is a light source unit held by a main body to be attached to an installation target, and includes a support plate having one surface and the other surface opposite to the one surface, a light source module provided on the side of the one surface, and a light receiving element provided on the side of the other surface while being housed in a resin case and having a light receiving portion for receiving an infrared signal. An opening through which the infrared signal passes is formed in the support plate so as to penetrate the one surface and the other surface at a portion where the light source module is not provided. A case opening is provided in the case at a location between the light receiving portion and the opening. The case has a cylindrical protruding portion protruding toward the outside of the case around the case opening.

Effect of the Invention

[0007] In the light source unit according to the present disclosure, the light receiving range of the light receiving element can be controlled by the opening and the case opening.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0009] The light source unit and the lighting fixture according to the embodiments of the present disclosure will be described with reference to the drawings. The same or corresponding components may be denoted by the same reference numerals, and repeated description may be omitted.

[0010] Embodiment 1. FIG. 1 is a perspective view of a lighting fixture 1 according to Embodiment 1. The lighting fixture 1 includes a light source unit 2 and a fixture body 3 that holds the light source unit 2. The fixture body 3 is attached to, for example, a ceiling. The fixture body 3 and the light source unit 2 are detachable. Thus, a user can select and replace the light source unit 2 having a different color temperature or brightness.

[0011] The light source unit 2 includes a light source, which will be described later, and a lighting device 5 that controls the power supplied to the light source. The light source unit 2 also includes a light-receiving element unit 4. The light-receiving element unit 4 receives a remote control signal and controls the lighting device 5. The remote control signal is an infrared signal. That is, the lighting device 5 controls the lighting state of the light source according to the signal received by the light-receiving portion 11a.

[0012] The light source unit 2 includes a cover 6. The lighting device 5 and the light-receiving element unit 4 are housed between the light source and the cover 6 and the fixture body 3. The lighting device 5 or the light-receiving element unit 4 may be mounted on the fixture body 3.

[0013] FIG. 2 is a diagram for explaining the circuit configuration of the light-receiving element unit 4 according to Embodiment 1. The light-receiving element unit 4 includes a light-receiving element 11, a control circuit 15, a first control interface 16, and a second control interface 17. The light-receiving element 11 receives an infrared signal by a light-receiving portion, which will be described later. The light-receiving element 11 can be configured by, for example, a photodiode or a phototransistor. The infrared signal is, for example, a signal from an infrared remote control 30.

[0014] The control circuit 15 converts the infrared signal received by the light receiving element 11 into a control signal. The control signal is a signal for controlling the lighting device 5. The first control interface 16 is connected to the lighting device 5.

[0015] The infrared signal from the infrared remote controller 30 includes, for example, information on the dimming rate. The light receiving element 11 receives the information on the specified dimming rate as an infrared signal from the infrared remote controller 30. The light receiving element 11 transmits the dimming rate to the control circuit 15. The control circuit 15 converts the dimming rate into a control signal and transmits it to the lighting device 5 via the first control interface 16. The lighting device 5 controls the power supplied to the light source according to the control signal. Thereby, the brightness of the light source unit 2 can be changed to the specified dimming rate.

[0016] The information included in the infrared signal from the infrared remote controller 30 is not limited to the dimming rate. The infrared signal may be a signal for turning on or off the light source. Also, the infrared signal may be a signal for specifying the color of the light emitted by the light source. The infrared signal may be a signal for setting an individual address. In this case, the control circuit 15 stores the individual address received by the light receiving element 11.

[0017] The second control interface 17 communicates with an external dimming controller 20. The dimming controller 20 controls the dimming etc. of the lighting fixture 1 from the outside. The dimming controller 20 transmits a dimming signal including an individual address to the light receiving element unit 4. The light receiving element unit 4 receives the dimming signal via the second control interface 17. The control circuit 15 determines whether the stored individual address matches the individual address included in the dimming signal. If the individual addresses match, the control circuit 15 controls the lighting device 5 via the first control interface 16 according to the dimming signal. If the individual addresses do not match, the control circuit 15 does not control the lighting device 5 according to the dimming signal.

[0018] A lighting system may be configured by connecting a plurality of lighting fixtures 1 to one dimming controller 20. Even in such a lighting system, a specific lighting fixture 1 can be individually controlled by the above control. Also, the lighting fixture 1 can be easily set up.

[0019] The communication between the dimming controller 20 and the second control interface 17 is performed either wired or wirelessly. In the case of wired communication, the second control interface 17 includes a terminal block to which a signal line is connected and a signal circuit that processes the wired signal. In the case of wireless communication, the second control interface 17 includes an antenna that receives wireless signals.

[0020] FIG. 3 is an exploded perspective view of the light receiving element unit 4 according to Embodiment 1. The light receiving element unit 4 includes a light receiving element 11, a circuit board 12, and a case 9. The light receiving element 11 and the circuit board 12 are housed in the case 9. The light receiving element 11 is mounted on the circuit board 12.

[0021] The case 9 is, for example, a resin case. The case 9 has a case top 9a and a case bottom 9b. The upper surface side of the circuit board 12 is covered by the case top 9a, and the lower surface side of the circuit board 12 is covered by the case bottom 9b. The case bottom 9b holds the circuit board 12. A first opening 10 is formed in the case bottom 9b at a location corresponding to the light receiving element 11.

[0022] FIG. 4 is a cross-sectional view of the light receiving element unit 4 according to Embodiment 1. The light receiving portion 11a of the light receiving element 11 is exposed from the case 9 through the first opening 10. The light receiving portion 11a is the portion of the light receiving element 11 that receives infrared rays. The light receiving portion 11a is provided inside the case 9 so as not to protrude outside the case 9 from the first opening 10.

[0023] The first opening 10 has a shape corresponding to the light receiving portion 11a of the light receiving element 11. The shape of the first opening 10 may be the same as the shape of the light receiving portion 11a. Also, the first opening 10 may have the same size as the light receiving portion 11a.

[0024] Case 9 has a protrusion 14 around the first opening 10. The protrusion 14 protrudes toward the inside of the case 9. The protrusion 14 protrudes toward the light receiving element 11. The protrusion 14 is provided along the first opening 10. The protrusion 14 may surround the light receiving portion 11a. With such a protrusion 14, the light receiving range of the light receiving element 11 can be controlled. In the example shown in FIG. 4, the light receiving range becomes wider compared to the case where the protrusion protrudes toward the outside of the case 9.

[0025] In addition, the protrusion 14 can prevent a person or an object from easily touching the light receiving element 11. Thereby, electric shock can be prevented. Further, the protrusion 14 can prevent foreign matter from entering the space in which the circuit board 12 is housed from the first opening 10. The foreign matter is, for example, an insect or dust.

[0026] FIG. 5 is a cross-sectional view of a light receiving element unit 204 according to a modification of Embodiment 1. In the light receiving element unit 204, the structure of the protrusion 214 of the case 209 is different from that of the light receiving element unit 4. The case 209 has a protrusion 214 that protrudes toward the outside of the case 209 around the first opening 10. The protrusion 214 can control the light receiving range to be narrower than the light receiving range of the light receiving element 11 alone. Also, the light receiving range becomes narrower compared to the example of FIG. 4.

[0027] Thus, it is possible to adjust the light receiving range of the light receiving element 11 by the protrusions 14 and 214. The shapes of the protrusions 14 and 214 are not limited to those shown in FIGS. 4 and 5. The shape of the protrusion can be changed according to the target light receiving range. For example, when it is desired to control the light receiving range in a specific direction, a protrusion may be provided only in the specific direction. Also, the protrusion may not be provided. Even in this case, it is possible to control the light receiving range to be narrower by the case 9 compared to the light receiving range of the light receiving element 11 alone.

[0028] In addition, the shape of the first opening 10 is not limited to that shown in FIGS. 4 and 5. The first opening 10 may expose the light receiving element 11 so that the light receiving element 11 can receive an infrared signal. Also, the shape or size of the first opening 10 may be changed according to the target light receiving range.

[0029] FIG. 6 is a cross-sectional view of the lighting fixture 1 according to Embodiment 1. The light source unit 2 includes a support plate 7. The support plate 7 has a first surface 7a and a second surface 7b on the side opposite to the first surface 7a. The support plate 7 is, for example, a metal plate.

[0030] A light source module 13 is provided on the first surface 7a side of the support plate 7. The support plate 7 holds the light source module 13. The light source module 13 has a light source substrate 13a provided on the first surface 7a and a light source 13b mounted on the light source substrate 13a. The light source 13b is a light-emitting element such as an LED. A plurality of light sources 13b may be arranged in the longitudinal direction of the lighting fixture 1 on the light source substrate 13a.

[0031] A light receiving element unit 4 is provided on the second surface 7b side of the support plate 7. The light receiving element unit 4 is held by the support plate 7 and housed in the fixture body 3. The light receiving portion 11a of the light receiving element 11 faces the second surface 7b of the support plate 7. The first opening 10 is formed in the surface of the case 9 that faces the support plate 7.

[0032] A second opening 8 is formed in the support plate 7. The second opening 8 is formed in a portion of the support plate 7 where the light source module 13 is not provided. In the present embodiment, the light source module 13 is provided at the center of the support plate 7. The second opening 8 is formed in a portion of the support plate 7 outside the light source module 13.

[0033] The second opening 8 at least partially overlaps the first opening 10 when viewed from a direction perpendicular to the first surface 7a. The second opening 8 is circular or elliptical. The second opening 8 may be a slit such as a rectangle. The light receiving element 11 receives an infrared signal through the first opening 10 and the second opening 8.

[0034] In the example of FIG. 6, the second opening 8 is displaced in a direction along the first surface 7a with respect to the first opening 10. Not limited to this, the second opening 8 may be provided directly below the first opening 10. Further, the second opening 8 may be circular or elliptical, and the center of the first opening 10 and the center of the second opening 8 may overlap in plan view. In this case, a circular light receiving range can be obtained with the second opening 8 as the center.

[0035] When the second opening 8 is a rectangular slit and the short side of the slit is shorter than the diameter of the first opening 10, the light receiving range may be narrower compared to the case where the second opening 8 is circular. Also in this case, if the length of the long side of the slit is ensured sufficiently, a light receiving range equivalent to that in the case where the second opening 8 is circular can be obtained.

[0036] That is, even if the shape of the second opening 8 is changed according to the structure of the light source unit 2 or the arrangement of the light receiving element unit 4, etc., it can be adjusted to a light receiving range equivalent to that before the change. For example, depending on the size of the light source module 13, there may be no space to form a circular second opening 8 in the support plate 7. Also in this case, a rectangular second opening 8 can provide a light receiving range equivalent to that in the circular case.

[0037] The cover 6 is provided on the first surface 7a side of the support plate 7. The cover 6 is fixed to the support plate 7 so as to cover the light source module 13. The cover 6 has a support portion 6a extending along the first surface 7a of the support plate 7. The support portion 6a closes the second opening 8. Thereby, it is possible to prevent foreign matter from entering the space on the second surface 7b side of the support plate 7 from the second opening 8.

[0038] The cover 6 is formed of resin. The resin material forming the cover 6 transmits light from the light source module 13 and infrared rays from the infrared remote control 30. Thereby, the light receiving performance of the light receiving element unit 4 can be ensured. The second opening 8 may be closed not only by the support portion 6a but also by a part of the cover 6. Or, the second opening 8 may be closed by the resin coupled to the cover 6.

[0039] Further, the light receiving element unit 4 is disposed away from the second surface 7b on the side opposite to the first surface 7a to which the light source module 13 is fixed. The light receiving element unit 4 is held, for example, by the support plate 7 or the cover 6 and is fixed while being spaced apart from the second surface 7b. As a result, the surface of the case 9 in which the first opening 10 is formed is disposed away from the second surface 7b of the support plate 7.

[0040] The light receiving range of the light receiving element 11 depends on the distance between the first opening 10 and the second opening 8. By fixing the light receiving element unit 4 to the support plate 7, variations in the distance between the first opening 10 and the second opening 8 can be suppressed. Therefore, the light receiving range can be accurately set.

[0041] When there is no space to mount the light receiving element unit 4 on the light source unit 2, the light receiving element unit 4 may be attached to the instrument body 3. Also in this case, the light receiving element unit 4 is mounted on the instrument body 3 so that the first opening 10 and the second opening 8 are separated by a certain distance. The light source module 13 is fixed to the support plate 7. For this reason, the temperature of the support plate 7 may increase due to the heat of the light source 13b. By mounting the light receiving element unit 4 on the instrument body 3, the light receiving element unit 4 can be made less susceptible to the heat from the light source 13b.

[0042] FIG. 7 is a diagram for explaining the change in the light receiving range due to the first opening 10 and the second opening 8. Using FIG. 7, the change in the light receiving range due to the shape or arrangement of the first opening 10 and the second opening 8 will be further explained. In FIG. 7, the case 209 is used for explanation as an example. Also, the first opening 10 and the second opening 8 are assumed to be circular. Further, the central axes of the first opening 10 and the second opening 8 are assumed to coincide.

[0043] Let the diameter of the first opening 10 be D1 and the diameter of the second opening 8 be D2. Also, let the distance between the case 209 and the support plate 307 be H. The distance H is the distance between the lower end of the protruding portion 214 and the second surface 307b of the support plate 307.

[0044] The light-receiving range of the light-receiving element 11 expands as D1 and D2 increase, and becomes narrower as they decrease. Also, D2 has a greater impact on the light-receiving range than D1. Further, as described with reference to FIGS. 4 and 5, when the protruding portion 214 is provided outside the case 209, the light-receiving range becomes narrower than when the protruding portion 214 is not provided. Also, when the protruding portion 214 is provided inside, the impact of the protruding portion 214 on the light-receiving range is small, but the light-receiving range can also be slightly narrowed compared to the case where the protruding portion 214 is not provided.

[0045] Also, the light-receiving range can be adjusted by the distance H. The light-receiving range expands as the distance H is shorter and becomes narrower as it is longer.

[0046] As described above, the light-receiving range of the light-receiving element 11 can be controlled by the sizes of D1 and D2, the shape of the protruding portion 214, and the distance H.

[0047] FIG. 8 is a diagram for explaining the change in the light-receiving range due to the deviation between the centers of the first opening 10 and the second opening 8. Using FIG. 8, the change in the light-receiving range due to the deviation between the centers of the first opening 10 and the second opening 8 will be further explained. In FIG. 8, the case 209 is used for explanation as an example. Also, it is assumed that the first opening 10 and the second opening 8 are circular. Further, it is assumed that the centers of the first opening 10 and the second opening 8 are displaced by a distance L in the direction along the first surface 7a.

[0048] In this case, the light-receiving range has different directivities on the left and right with respect to the light-receiving portion 11a as the center. That is, the light-receiving range can be made asymmetric by the distance L. Therefore, considering the environment where the lighting fixture 1 is installed, the shape of the light-receiving range can be adjusted.

[0049] FIG. 9 is a diagram showing a state where the lighting fixture 1 is installed on the wall 42. When the lighting fixture 1 is installed on the wall 42, the light source unit 2 is in a horizontal orientation. At this time, the light-receiving element 11 also becomes horizontal. That is, the light-receiving range spreads toward the floor surface 43 side and the ceiling surface 41 side. In such a case, the light-receiving range 50 of the light-receiving element 11 may be set so that the distance L is adjusted and the ceiling surface 41 side is narrow and the floor surface 43 side is wide. Thereby, an effective light-receiving range can be obtained in actual use.

[0050] FIG. 10 is a diagram showing the light-receiving ranges of a plurality of lighting fixtures 1a and 1b. The lighting system 100 includes a plurality of lighting fixtures 1a and 1b. In the lighting system 100 in which a plurality of lighting fixtures 1a and 1b are installed in this way, the light-receiving range of the lighting fixture 1a may be set wider in a specific direction than in other directions. For example, the second opening 8 of the light source unit 2 included in the lighting fixture 1a may be displaced in a direction away from another adjacent lighting fixture 1b with respect to the first opening 10. Thereby, the area where the light-receiving ranges 50 of the adjacent lighting fixtures 1a and 1b overlap can be reduced. Therefore, unintended operations or settings can be prevented.

[0051] In FIGS. 7 and 8, an example in which at least a part of the second opening 8 overlaps the first opening 10 is shown. However, the second opening 8 does not necessarily have to overlap the first opening 10 when viewed from a direction perpendicular to the first surface 7a. Thereby, the light-receiving range can be made largely asymmetric with respect to the light-receiving portion 11a.

[0052] As described above, in the present embodiment, two openings are provided in the light-receiving path of the light-receiving element 11. The light-receiving range of the light-receiving element 11 can be adjusted to a target range by the two openings. Also, even when a plurality of lighting fixtures 1 are installed adjacent to each other, unintended operations or settings can be prevented.

[0053] Further, when the light source unit and the light-receiving element are arranged on the same plane, the light-receiving range of the light-receiving element is ensured to be wide, and there is a risk that the light-receiving performance may deteriorate due to the influence of external light. In contrast, in the present embodiment, the light-receiving element 11 is arranged on the second surface 7b side of the support plate 7 and separated from the support plate 7. Thereby, a decrease in the light-receiving performance of the light-receiving element 11 due to external light can be suppressed.

[0054] In addition, in the present embodiment, the light-receiving range can be easily adjusted by adjusting the position or shape of the second opening 8 formed in the support plate 7. Therefore, the light-receiving range can be easily adjusted according to the structure or arrangement of the light-receiving element unit 4 to be used. Further, when the light-receiving element unit 4 is not used, the second opening 8 may not be provided. For this reason, dedicated design or processing of the support plate 7 is not required, and parts commonality can be achieved.

[0055] Note that the technical features described in the present embodiment may be used in appropriate combinations.

Description of Reference Numerals

[0056] 1, 1a, 1b Lighting fixture, 2 Light source unit, 3 Appliance body, 4 Light-receiving element unit, 5 Lighting device, 6 Cover, 6a Support portion, 7 Support plate, 7a First surface, 7b Second surface, 8 Second opening, 9 Case, 9a Case top, 9b Case bottom, 10 First opening, 11 Light-receiving element, 11a Light-receiving portion, 12 Circuit board, 13 Light source module, 13a Light source substrate, 13b Light source, 14 Protrusion, 15 Control circuit, 16 First control interface, 17 Second control interface, 20 Dimmer controller, 30 Infrared remote control, 41 Ceiling surface, 42 Wall, 43 Floor surface, 50 Light-receiving range, 100 Lighting system, 204 Light-receiving element unit, 209 Case, 214 Protrusion, 307 Support plate, 307b Second surface

Claims

1. A light source unit held by a main body attachable to an object to be installed, comprising: a support plate having one surface and the other surface opposite to the one surface; a light source module provided on the side of the one surface; a light receiving element provided on the side of the other surface while being housed in a resin case and having a light receiving portion for receiving an infrared signal; and an opening through which the infrared signal passes is formed in a portion of the support plate where the light source module is not provided so as to penetrate the one surface and the other surface; a case opening is provided in a portion between the light receiving portion and the opening in the case; the case has a cylindrical protruding portion protruding toward the outside of the case around the case opening, the light source unit.

2. The light source unit according to claim 1, wherein the protruding portion protrudes toward the opening.

3. The light source unit according to claim 1 or claim 2, wherein the protruding portion at least partially overlaps the opening when viewed from a direction perpendicular to the one surface of the support plate.

4. The light source unit according to any one of claims 1 to 3, wherein the protruding portion is formed such that the size of the case opening is equal to or smaller than the size of the opening.

5. A lighting fixture comprising the light source unit according to any one of claims 1 to 4, and the main body attachable to the object to be installed and holding the light source unit. ​

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