Light-emitting module

Abstract

To provide a light emitting module excellent in heat radiation property and waterproofing property capable of emitting light of high luminance.SOLUTION: A light emitting module 1 includes a heat sink 10, a light source substrate 20, a lens 30, an upper lid 40, and a loading part 50. A concave part 11 is formed on the top face of the heat sink 10. Fins 12 are formed on the undersurface of the heat sink 10. The light source substrate 20 is disposed in the concave part 11. The light source substrate 20 includes LEDs 21, which are light emitting elements. The lens 30 covers the light emitting elements 21. The upper lid 40 is disposed on the top face of the heat sink 10. The top face of the lens 30 is exposed in an opening 42 provided on the upper lid 40. The loading part 50 is loaded in a space outside the lens 30 of an internal space 81 of a housing 80 composed of the heat sink 10 and the upper lid 40. Therefore, light attenuation by the loading part 50 does not occur so that light of high luminance can be emitted from the LEDs 21 to an external space through the lens 30.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a light emitting module. [Background technology]

[0002] Conventionally, light emitting devices have been known that include a substrate on which an LED, which is a light emitting element, is mounted. Conventional light emitting devices are described, for example, in Patent Document 1 and Patent Document 2. In this type of light emitting device, heat is generated from the substrate. Furthermore, if water droplets adhere to the substrate, it can cause malfunction. For this reason, light emitting devices must have high heat dissipation and high waterproof properties in order to be used in various locations, both indoors and outdoors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4274935 specification [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-219378 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Documents 1 and 2 describe filling the inside of a case that houses a substrate with a resin such as silicone to make it waterproof. However, in the devices of Patent Documents 1 and 2, the resin filled in the case covers the LED on the substrate. With this structure, the light emitted from the LED is attenuated by the resin, making it difficult to irradiate high-intensity light into an external space.

[0005] An object of the present invention is to provide a light-emitting module that has excellent heat dissipation and waterproof properties and is capable of emitting high-intensity light. [Means for solving the problem]

[0006] The present invention is a light-emitting module comprising: a heat sink having fins formed on its underside and a recess formed on its top side; a light source substrate disposed in the recess and having a light-emitting element; a top cover covering the top surface of the heat sink and having an opening above the light-emitting element; a lens covering the light-emitting element and having its top surface exposed to the opening; and a resin part filling the space outside the lens within the internal space of a housing formed by the heat sink and the top cover. [Effects of the Invention]

[0007] According to the present invention, a light-emitting module can be provided that has excellent heat dissipation properties due to the heat sink and excellent waterproofing properties due to the resin part, and can be installed in various locations. In particular, the resin part that provides waterproofing is filled only in the space outside the lens. Therefore, there is no light attenuation due to the resin part, and high-intensity light can be irradiated from the light-emitting element through the lens to the external space. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a top view of the light-emitting module. [Figure 2] FIG. 2 is a top view of the light-emitting module with the top cover removed. [Figure 3] FIG. 2 is a side view of the light-emitting module. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of the light-emitting module. [Figure 5] 10A and 10B are diagrams illustrating a state in which a plurality of light-emitting modules are connected and used; [Figure 6] FIG. 1 is a diagram conceptually illustrating power distribution. [Figure 7] FIG. 10 is a vertical cross-sectional view of a light-emitting module according to a first modified example. [Figure 8] FIG. 10 is a side view of a light-emitting module according to a first modified example. [Figure 9] FIG. 10 is a side view of a light-emitting module according to a second modified example. [Figure 10] FIG. 11 is a vertical cross-sectional view of a light-emitting module according to a third modified example. [Figure 11]FIG. 11 is a top view of a light-emitting module according to a fourth modified example with the top cover removed. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0010] In the following description, the direction perpendicular to the light source board is defined as the "vertical direction," and the lens side relative to the light source board is defined as "upper," and the positional relationship of each part will be described. However, this definition of the vertical direction is merely for the convenience of explanation and does not limit the position of the light-emitting module of the present invention when in use. The light-emitting module of the present invention can be used in various positions.

[0011] <1. Light-emitting module configuration> Fig. 1 is a top view of a light-emitting module 1 according to one embodiment of the present invention. Fig. 2 is a top view of the light-emitting module 1 with the top cover 40 removed. Fig. 3 is a side view of the light-emitting module 1. Fig. 4 is a vertical cross-sectional view of the light-emitting module 1. Fig. 5 is a diagram showing a state in which a plurality of light-emitting modules 1 are connected together for use.

[0012] This light-emitting module 1 is a lighting fixture that can be installed in various indoor and outdoor locations and can emit light with a light distribution and color scheme that suits the space. The light-emitting module 1 can be used alone, but as shown in Figure 5, multiple light-emitting modules 1 can also be used in a state where they are connected via a cable 60. Multiple light-emitting modules 1 can be arranged in any shape, such as a straight line, a curved line, or a flat line. This allows for greater freedom in spatial design using lighting.

[0013] As shown in FIGS. 1 to 4, the light emitting module 1 includes a heat sink 10, a light source substrate 20, a lens 30, an upper cover 40, a resin part 50, a cable 60, and a controller .

[0014] The heat sink 10 is a member that supports the light source substrate 20 and promotes heat dissipation from the light source substrate 20. The heat sink 10 is made of a metal that has high rigidity and high thermal conductivity. Specifically, the heat sink 10 is made by casting aluminum (aluminum die casting).

[0015] The heat sink 10 has a generally rectangular plate shape when viewed from above. A recess 11 is formed on the top surface of the heat sink 10. The recess 11 has a flat bottom surface that extends along the top surface of the heat sink 10. As shown in FIG. 2 , in this embodiment, the shape of the recess 11 when viewed from above is octagonal. However, the shape of the recess 11 when viewed from above may be other shapes, such as rectangular. The light source substrate 20, the lens 30, and the resin part 50 are housed in the recess 11.

[0016] A plurality of fins 12 are formed on the underside of the heat sink 10. Each fin 12 is a protrusion that projects downward. The surface area of ​​the heat sink 10 is increased by the plurality of fins 12. This allows the heat generated from the light source substrate 20 to be efficiently released to the external space via the heat sink 10.

[0017] The light source substrate 20 is a circuit board on which LEDs (Light Emitting Diodes) 21, which are light-emitting elements, are mounted. The light source substrate 20 is housed in the recess 11 of the heat sink 10 and is arranged along the bottom surface of the recess 11. In this embodiment, a plurality of LEDs 21 and various elements that constitute an electric circuit for supplying power to the LEDs 21 are mounted on the upper surface of the light source substrate 20. The plurality of LEDs 21 emit light when power is supplied to the light source substrate 20 from an external power source via a cable 60, which will be described later.

[0018] The plurality of LEDs 21 includes a plurality of LEDs 21r, 21g, and 21b that emit light of different colors. Specifically, the plurality of LEDs 21 includes a plurality of red LEDs 21r that emit red light, a plurality of green LEDs 21g that emit green light, and a plurality of blue LEDs 21b that emit blue light. By adjusting the intensity of the light emitted from these red LEDs 21r, green LEDs 21g, and blue LEDs 21b, it is possible to adjust the color tone (color temperature) of the light irradiated to the outside.

[0019] For example, an aluminum substrate is used for the light source substrate 20. The aluminum substrate has a copper foil pattern formed on the upper surface of an aluminum base layer with an insulating layer interposed between them. The lower surface of the base layer of the light source substrate 20 contacts the bottom surface of the recess 11 of the heat sink 10. This allows heat generated from the LEDs 21 and various elements on the light source substrate 20 to be efficiently conducted to the heat sink 10.

[0020] The lens 30 is a member for diffusing light emitted from the plurality of LEDs 21. The lens 30 is made of a light-transmitting material such as acrylic mixed with a diffusing agent. The lens 30 has a dome shape that bulges upward. In other words, the lens 30 has a thin plate shape and a curved surface that protrudes upward. The lens 30 is disposed on the upper surface of the light source substrate 20. The plurality of LEDs 21 are covered by the lens 30.

[0021] The lens 30 has a flat, annular flange 31 on its outer periphery. The lens 30 is placed on the upper surface of the light source substrate 20 with the lower surface of the flange 31 in contact with the upper surface of the light source substrate 20. Then, bolts 32 are inserted into holes formed in the flange 31 and holes formed in the light source substrate 20, and the bolts 32 are fastened to the heat sink 10. In this way, the heat sink 10, the light source substrate 20, and the lens 30 are fixed to one another.

[0022] The top cover 40 is a plate-like member that covers the top surface of the heat sink 10. When viewed from above, the top cover 40 has substantially the same shape as the heat sink 10. The top cover 40 is fixed to the heat sink 10 by a plurality of bolts 41. The light source substrate 20 and the resin part 50 are housed in an internal space 81 of a housing 80 that is formed by the heat sink 10 and the top cover 40.

[0023] The top cover 40 does not necessarily need to cover the entire top surface of the heat sink 10, but it is sufficient if it covers at least a necessary portion of the top surface.

[0024] As shown in Fig. 4, an opening 42 is formed in the center of the top cover 40. The opening 42 is a through-hole that passes through the top cover 40 in the vertical direction. The opening 42 is located above the plurality of LEDs 21. In this embodiment, the shape of the opening 42 when viewed from above is circular. However, the shape of the opening 42 when viewed from above may be other shapes, such as rectangular.

[0025] The upper surface of the lens 30 is exposed to the opening 42. Therefore, light emitted from the plurality of LEDs 21 is irradiated to the outside through the lens 30 without being blocked by the top cover 40. In addition, the upper surface of the lens 30 protrudes upward beyond the opening 42. This allows light to be irradiated from the lens 30 to the outside at a wide irradiation angle.

[0026] 4, the portion of the top cover 40 surrounding the opening 42 is recessed downward. This allows the upper surface of the lens 30 to protrude from the opening 42 while minimizing the amount of protrusion of the lens 30 from the upper end surface of the top cover 40.

[0027] The outer surface of the portion of lens 30 exposed through opening 42 is a convex curved surface. Therefore, even when light-emitting module 1 is used outdoors and water droplets get on light-emitting module 1, water droplets are less likely to accumulate on the outer surface of lens 30. Therefore, it is possible to prevent water droplets from disrupting the light distribution.

[0028] The resin portion 50 is an example of a "filling portion" in the present invention. The resin portion 50 is filled inside the housing 80 to protect the light source substrate 20 from water droplets. The resin portion 50 is formed by injecting molten resin (potting material) into the housing 80 and allowing it to harden. For example, silicone resin, epoxy resin, polyurethane resin, etc. are used for the resin portion 50. The heat sink 10 has a filling port 13 for injecting the molten resin. The filling port 13 is a notch recessed downward from the upper end of the side wall of the heat sink 10. When the top cover 40 is attached to the heat sink 10, the filling port 13 becomes a hole that communicates with the internal space 81 of the housing 80.

[0029] During manufacturing of the light emitting module 1, after the light source substrate 20, lens 30, and top cover 40 are attached to the heat sink 10, molten resin is injected into the housing 80 through the filling port 13. Specifically, a nozzle of a dispenser is inserted into the filling port 13, and the molten resin is discharged from the nozzle. As a result, the molten resin fills the space outside the lens 30 within the internal space 81 of the housing 80. The molten resin then hardens to form the resin portion 50. The electrical wiring, various elements, solder, etc. on the light source substrate 20 are covered with the resin portion 50. This protects the electrical circuit of the light source substrate 20 from water droplets.

[0030] The internal space 81 of the housing 80 is divided by the lens 30 into a space inside the lens 30 and a space outside the lens 30. Therefore, the molten resin injected into the housing 80 fills only the space outside the lens 30 and does not flow inside the lens 30. Furthermore, the molten resin is injected with the top cover 40 closed and the edge of the opening 42 of the top cover 40 in close contact with the lens 30. Therefore, the molten resin injected into the housing 80 does not rise up onto the upper surface of the lens 30. Therefore, the light emitted from the multiple LEDs 21 is irradiated to the outside through the lens 30 without being attenuated by the resin part 50.

[0031] Furthermore, the lens 30 is fixed to the light source substrate 20 with the lower surface of the annular flange 31 in contact with the upper surface of the light source substrate 20. Therefore, there is no gap between the lens 30 and the light source substrate 20 through which the molten resin can pass. This makes it possible to further prevent the molten resin from flowing into the space inside the lens 30 when the molten resin is injected.

[0032] Although the resin part 50 is not formed in the space inside the lens 30, the entire periphery of the lens 30 is covered with the resin part 50. This seals the gap between the lens 30 and the upper surface of the light source substrate 20. Therefore, water droplets do not penetrate inside the lens 30 when the light-emitting module 1 is in use. In other words, with this structure of the light-emitting module 1, the multiple LEDs 21 are protected from water droplets even though they are not directly covered by the resin part 50.

[0033] 3, one filling port 13 is formed in the side wall of the heat sink 10. In this case, the single filling port 13 also serves as an air vent hole when the molten resin is injected. However, the size of the filling port 13 may be reduced, and an air vent hole may be provided in the heat sink 10 in addition to the filling port 13.

[0034] Alternatively, a filling port may be provided in the top cover 40, and the molten resin may be injected into the housing 80 through the filling port. In this case, however, the molten resin is injected perpendicular to the light source substrate 20. In contrast, in this embodiment, the molten resin is injected through a filling port 13 formed on the side surface of the housing 80. In this way, the molten resin can be injected in a direction along the top surface of the light source substrate 20. Therefore, the molten resin can be filled more uniformly inside the housing 80.

[0035] The cable 60 is a wiring for supplying power to the light source substrate 20. The cable 60 includes four electric wires 61r, 61g, 61b, and 61c. The four electric wires 61r, 61g, 61b, and 61c are insulated from one another by being covered with an insulating film. The four electric wires 61r, 61g, 61b, and 61c are bundled together by a cylindrical outer covering to form the single cable 60.

[0036] 2 and 4, the heat sink 10 has a pair of grooves 14. The pair of grooves 14 are formed in a pair of side walls of the heat sink 10 that face each other with the light source substrate 20 in between. The cable 60 is fitted into the grooves 14. When the top cover 40 is attached to the heat sink 10, the cable 60 is sandwiched between the grooves 14 and the top cover 40. This holds the cable 60 in place relative to the housing 80.

[0037] Four pads 22 with exposed copper foil are provided on the upper surface of the light source substrate 20. The tips of four electric wires 61r, 61g, 61b, and 61c are soldered to the four pads 22, respectively. This electrically connects the four electric wires 61r, 61g, 61b, and 61c to the electric circuit of the light source substrate 20. The four pads 22 are arranged in a substantially radial pattern around the groove 14. This allows the four pads 22 to be spaced widely apart even when the light source substrate 20 is small. This facilitates the work of soldering the electric wires 61r, 61g, 61b, and 61c to the pads 22.

[0038] Of the four electric wires 61r, 61g, 61b, and 61c, the electric wire 61r is a wire for supplying power to the red LED 21r. The electric wire 61g is a wire for supplying power to the green LED 21g. The electric wire 61b is a wire for supplying power to the blue LED 21b. The electric wire 61c is a common wire for supplying a common reference voltage to the three color LEDs 21r, 21g, and 21b.

[0039] The controller 70 is a means for controlling the power supplied to the light source board 20. The controller 70 is electrically connected to the cable 60. The controller 70 distributes the power supplied from the DC power supply 71 to the three electric wires 61r, 61g, and 61b. FIG. 6 is a diagram conceptually showing the state of power distribution to the electric wires 61r, 61g, and 61b. As shown in FIG. 6, the controller 70 modulates the power supplied from the DC power supply 71 into a PWM pulse and distributes it to the electric wires 61r, 61g, and 61b.

[0040] As shown in FIG. 6 , the controller 70 also includes a communication unit 72. The communication unit 72 is, for example, a communication module that is detachable from the main body of the controller 70. The communication unit 72 inputs a control signal to the controller 70 based on a signal received from the outside via wired or wireless communication. For example, a user of the light-emitting module 1 installs a dedicated application on an external terminal 73, such as a smartphone or tablet PC, and selects a desired light color in the application, thereby transmitting a signal indicating the light color to the communication unit 72. The communication unit 72 then inputs a control signal based on the received signal to the controller 70.

[0041] The controller 70 adjusts the pulse width of the power supplied to the three electric wires 61r, 61g, and 61b based on a control signal input from the communication unit 72. For example, if a signal indicating a light color with a strong reddish tint is input, the controller 70 distributes the power so that the pulse width of the power supplied to the electric wire 61r is increased. This adjusts the amount of light emitted from the red LED 21r, green LED 21g, and blue LED 21b. As a result, the color of the light emitted from the multiple LEDs 21 can be adjusted as desired.

[0042] As described above, this light-emitting module 1 has both excellent heat dissipation properties provided by the heat sink 10 and excellent waterproof properties provided by the resin part 50. Therefore, it can be installed in a variety of locations, both indoors and outdoors. In particular, the resin part 50, which provides waterproofing, is filled only in the space outside the lens 30 within the internal space 81 of the housing 80. The LED 21 disposed inside the lens 30 is not covered by the resin part 50. Therefore, the light emitted from the LED 21 passes through the lens 30 and is radiated to the outside without being attenuated by the resin part 50. This allows high-intensity light to be radiated to the outside. Furthermore, the brightness and color of this high-intensity light can be freely adjusted by external operation.

[0043] <2. Modifications> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. Various modifications will be described below, focusing on the differences from the above embodiment.

[0044] <2-1. First modified example> FIG. 7 is a longitudinal cross-sectional view of a light-emitting module 1 according to a first modified example. FIG. 8 is a side view of the light-emitting module 1 according to the first modified example. The light-emitting module 1 of FIGS. 7 and 8 includes a reflector 90 in addition to the configuration of the above embodiment. The reflector 90 is disposed on the upper surface of the upper cover 40. The reflector 90 is made of, for example, aluminum. The reflector 90 has an annular reflective surface that surrounds the central axis 9 of the lens 30 and gradually widens in diameter as it extends upward. The reflective surface is mirror-finished. Light emitted from the multiple LEDs 21 and that passes through the lens 30 is reflected on the surface of the reflector 90. This allows the light distribution of the light-emitting module 1 to be adjusted.

[0045] The reflector 90 is detachably attached to the housing 80 by a fixture 91. The lower end of the reflector 90 is fixed to the fixture 91. As shown in FIG. 8 , the fixture 91 is a U-shaped leaf spring. The fixture 91 is attached to the housing 80 so as to sandwich the upper and lower surfaces of the housing 80. By making the reflector 90 detachable from the housing 80 in this way, the user of the light-emitting module 1 can choose whether or not to use the reflector 90 as needed. It is also possible to prepare multiple types of reflectors 90 and select and attach the most appropriate reflector 90 to the housing 80 depending on the situation. The fixture 91 may be fixed to the housing 80 with screws or the like.

[0046] <2-2. Second modified example> FIG. 9 is a side view of a light-emitting module 1 according to a second modified example. Like those in FIGS. 7 and 8, the light-emitting module 1 in FIG. 9 also includes a reflector 90. However, whereas the reflector 90 in FIGS. 7 and 8 is annular and surrounds the periphery of the central axis 9 of the lens 30, the reflector 90 in FIG. 9 is a non-annular plate that extends only partially around the periphery of the central axis 9 of the lens 30. In this way, light can be emitted in a direction around the central axis 9 of the lens 30 where the reflector 90 is not present. Therefore, when the light-emitting module 1 is placed in a corner of the ceiling of a room, light can be emitted well even to the inner corner.

[0047] <2-3.Third modified example> 10 is a vertical cross-sectional view of a light-emitting module 1 according to a third modified example. In the above-described embodiment, a single-sided aluminum board is used for the light source board 20. The electric wires 61r, 61g, 61b, and 61c of the cable 60 are soldered to the upper surface of the light source board 20. In contrast, in the example of FIG. 10, a double-sided resin board is used for the light source board 20. The electric wires 61r, 61g, 61b, and 61c of the cable 60 are soldered to the lower surface of the light source board 20.

[0048] In this way, by using a double-sided board, both sides of the light source board 20 can be used as wiring space, so the light source board 20 can be made smaller than in the case of a single-sided board. Therefore, the housing 80 of the light-emitting module 1 can also be made smaller. Furthermore, by increasing the wiring space, the electric wires 61r, 61g, 61b, and 61c can be made of thicker wires, and the allowable current capacity can be increased.

[0049] <2-4. Fourth Modification> FIG. 11 is a top view of the light-emitting module 1 according to the fourth modification example with the top cover 40 removed. In the example of FIG. 11, a changeover switch 23 is provided on the light source substrate 20. The changeover switch 23 is a switch that changes the resistance value of the current supply path from the electric wires 61r, 61g, and 61b to the LEDs 21. When the changeover switch 23 is operated to change the resistance value, the value of the current flowing through the multiple LEDs 21 changes. This makes it possible to change the intensity of the light emitted from the multiple LEDs 21.

[0050] In the example of FIG. 11, a two-state changeover switch 23 is used, but the invention is not limited to this, and a three-state or more changeover switch may be used so that the resistance value can be switched between three or more levels.

[0051] <2-5. Other variations> In the above embodiment, the light source substrate 20 is equipped with LEDs 21r, 21g, and 21b of multiple colors. However, the light emitting module of the present invention may be equipped with only LEDs of a single color. Also, in the above embodiment, the cable 60 includes four electric wires 61r, 61g, 61b, and 61c. However, the number of electric wires included in the cable 60 may be one to three, or may be five or more.

[0052] In the above embodiment, the LEDs 21r, 21g, and 21b of multiple colors emit red, green, and blue light, respectively. However, the LEDs 21 may emit light of other colors. For example, the LEDs 21 of multiple colors may emit red, yellow-white, and bluish-white light, respectively.

[0053] Furthermore, the detailed shapes of the components of the light-emitting module 1 may be changed as appropriate without departing from the spirit of the present invention.

[0054] Furthermore, the elements appearing in the above-described embodiments and modifications may be selected as appropriate within the scope of not causing any contradiction.

[0055] <3. Extraction of inventions> The following inventions can be cited as examples of inventions extracted from the above-described embodiments and modifications.

[0056] The first invention is a light-emitting module comprising: a heat sink having fins formed on its underside and a recess formed on its top side; a light source substrate arranged in the recess and having a light-emitting element; a top cover arranged on the top surface of the heat sink and having an opening above the light-emitting element; a lens covering the light-emitting element and having its top surface exposed to the opening; and a filling portion filling the space outside the lens within the internal space of a housing formed by the heat sink and the top cover.

[0057] A second invention is a light-emitting module of the first invention, further comprising a cable for supplying power to the light source board, the light source board being a double-sided board, the light-emitting element being arranged on the upper surface of the light source board, and the cable being connected to the lower surface of the light source board.

[0058] A third aspect of the present invention is the light emitting module of the second aspect of the present invention, wherein the light source substrate is made of resin.

[0059] A fourth invention is a light-emitting module of the first invention, further comprising a cable for supplying power to the light source board, the heat sink having a groove for holding the cable, the cable including a plurality of electric wires, the light source board having a plurality of pad portions to which the plurality of electric wires are connected, the plurality of pad portions being arranged at intervals from one another in a substantially radial pattern centered on the groove.

[0060] A fifth invention is a light-emitting module of the first invention, further comprising a controller that controls the power supplied to the light source board, the light source board having a predetermined number of light-emitting elements that emit light of different colors, and the controller adjusts the power supplied to the predetermined number of light-emitting elements based on a signal input from outside.

[0061] A sixth invention is a light-emitting module according to any one of the first to fifth inventions, wherein the filling portion is made of hardened molten resin, and the heat sink has a filling port for injecting the molten resin.

[0062] A seventh aspect of the present invention is the light emitting module of any one of the first to sixth aspects of the present invention, wherein the light source substrate has a changeover switch that changes the resistance value of a current supply path to the light emitting element.

[0063] An eighth aspect of the present invention is the light emitting module according to any one of the first to seventh aspects of the present invention, further comprising a reflector that reflects light emitted from the light emitting element.

[0064] A ninth aspect of the present invention is the light emitting module of the eighth aspect of the present invention, further comprising a fixture that clamps the housing and fixes the reflector.

[0065] A tenth aspect of the present invention is the light emitting module of the eighth or ninth aspect of the present invention, wherein the reflector is a non-annular plate that extends only partially around the central axis of the lens.

[0066] An eleventh aspect of the present invention is the light-emitting module according to any one of the first to tenth aspects of the present invention, wherein the outer surface of the lens is a convex curved surface.

[0067] A twelfth aspect of the present invention is the light emitting module according to any one of the first to eleventh aspects of the present invention, wherein the lens is fixed in contact with the upper surface of the light source substrate.

[0068] According to the first to twelfth inventions, a light-emitting module can be provided that has excellent heat dissipation properties due to the heat sink and excellent waterproofing properties due to the filling portion, and can be installed in various locations. In particular, the filling portion for achieving waterproofing is filled only in the space outside the lens. Therefore, there is no attenuation of light due to the filling portion, and high-intensity light can be irradiated from the light-emitting element to the external space via the lens.

[0069] In particular, according to the second aspect of the present invention, the use of a double-sided board allows the board to be made smaller.

[0070] In particular, according to the fourth aspect of the present invention, the pads can be spaced apart widely, which makes it easier to connect wires to the pads.

[0071] In particular, according to the fifth aspect of the invention, the light and color of the light emitting module can be controlled from the outside.

[0072] In particular, according to the sixth aspect of the present invention, the molten resin can be filled into the housing with the top cover closed.

[0073] In particular, according to the seventh aspect of the present invention, the intensity of the light emitted from the light emitting element can be changed by operating the changeover switch.

[0074] In particular, according to the eighth aspect of the present invention, the light emitted from the light emitting element can be reflected by the reflector, thereby adjusting the light distribution.

[0075] In particular, according to the ninth aspect of the present invention, it is possible to select whether or not to use a reflector. Also, if multiple types of reflectors are prepared, it is possible to select the most suitable reflector depending on the situation and attach it to the housing.

[0076] In particular, according to the tenth aspect of the present invention, when the light emitting module is placed in a corner of the ceiling of a room, light can be irradiated well even into the corner.

[0077] In particular, according to the eleventh aspect of the invention, water droplets are less likely to accumulate on the outer surface of the lens.

[0078] In particular, according to the twelfth aspect of the present invention, it is possible to prevent the resin from flowing into the inside of the lens when the resin is filled. [Explanation of symbols]

[0079] 1 Light-emitting module 9 Center axis 10 Heatsink 11 Recess 12 Finn 13 Filling port 14 groove 20 Light source board 21 LED 21b Blue LED 21g green LED 21r Red LED 22 Pad section 23 Selector switch 30 lenses 31 flange 40 Top lid 42 Aperture 50 Resin part 60 Cable 61b Electric wire 61c electric wire 61g electric wire 61r electric wire 70 Controller 71 DC power supply 72 Communications Department 73 External Terminal 80 cabinets 81 Interior Space 90 Reflector 91 Mounting fixture

Claims

1. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover that is a plate-like member covering an upper surface of the heat sink and has an opening above the light-emitting element; a lens covering the light-emitting element and having an upper surface protruding from the opening; a filling portion filling a space outside the lens in an internal space of the housing surrounded by the recess and the upper cover; A light emitting module comprising:

2. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with A cable that supplies power to the light source board Furthermore, the light source substrate is a double-sided substrate, the light emitting element is disposed on an upper surface of the light source substrate, The cable is connected to the lower surface of the light source substrate.

3. 3. The light emitting module according to claim 2, The light source substrate is made of resin.

4. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with A cable that supplies power to the light source board Furthermore, the heat sink has a groove for holding the cable; The cable includes a plurality of wires. the light source substrate has a plurality of pad portions to which the plurality of electric wires are connected, The light-emitting module, wherein the pad portions are arranged at intervals from one another in a substantially radial pattern centered on the groove.

5. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with a controller for controlling the power supplied to the light source board; Furthermore, the light source substrate has a predetermined number of light emitting elements that emit light of different colors, The controller adjusts the power supplied to the predetermined number of light-emitting elements based on an externally input signal.

6. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with the filling portion is formed by hardening a molten resin, The heat sink is A filling port for injecting the molten resin A light emitting module having:

7. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with The light source substrate is A changeover switch for changing the resistance value of a current supply path to the light emitting element A light emitting module having:

8. The light emitting module according to any one of claims 1 to 5, a reflector that reflects light emitted from the light-emitting element; The light emitting module further comprises:

9. a heat sink having fins formed on its lower surface and a recess formed on its upper surface; a light source substrate disposed in the recess and having a light emitting element; an upper cover disposed on an upper surface of the heat sink and having an opening above the light emitting element; a lens covering the light-emitting element and having an upper surface exposed to the opening; a filling portion filling a space outside the lens in an internal space of a housing formed by the heat sink and the upper cover; Equipped with a reflector that reflects light emitted from the light-emitting element; Furthermore, A fixture that clamps the housing and fixes the reflector The light emitting module further comprises:

10. 9. The light emitting module according to claim 8, A light emitting module, wherein the reflector is a non-annular plate that extends only partially around the central axis of the lens.

11. The light emitting module according to any one of claims 1 to 5, The outer surface of the lens is a convex curved surface.

12. The light emitting module according to any one of claims 1 to 5, The lens is fixed in contact with the upper surface of the light source substrate.

13. The light-emitting module according to claim 1, the upper cover has a portion recessed downward around the opening, The light emitting module, wherein the downwardly recessed portion is in close contact with the lens.

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