JP2015156394A - Luminaire device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a light distribution of 180 degree or more with respect to an interface joining a translucent globe and a luminaire device body with a simple structure.

SOLUTION: There are provided: a double-sided mountable-type LED substrate 3 including a first luminous face 31a which is a front surface and a second luminous face which is a rear surface, the first luminous face 31a being mounted with an LED element 8a (first light source) and the second luminous face being mounted with an LED element 8b (second light source); and a luminaire device body 50 having an exterior appearance made up of a substrate installation face 44 having an area smaller than the rear surface, a bottom part 45 having an area larger than the substrate installation face 44, and a side face extending from a circumference of the substrate installation face 44 towards a circumference of the bottom part 45. In the luminaire device body 50, the LED substrate 3 is installed by bringing its rear surface into contact with the substrate installation face 44. On the region of the rear surface of the LED substrate 3 which does not come into contact with the substrate installation face 44, the LED element 8b (second light source) is mounted in the region outside of the region on which the LED element 8a (first light source) is mounted when viewed in the axis direction.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a lighting device using a light emitting diode element.

  Various improvements have been made to realize LED light bulbs with a wide light distribution close to incandescent bulbs.

JP 2001-243807 A JP 2009-4130 A JP 2004-296245 A JP 2008-103112 A JP 2010-129300 A JP 2010-157459 A JP 2012-181969 A

  An object of this invention is to implement | achieve the illuminating device of wide light distribution using a light emitting diode element.

  A lighting device according to the present invention is a double-sided mounting type substrate in which a first light source is mounted on a first light-emitting surface as a front surface, and a second light source is mounted on a second light-emitting surface as a back surface, A mounting surface that is smaller than the area of the back surface, a facing surface that faces the mounting surface and that is larger than the area of the mounting surface, and a side surface that extends from the periphery of the mounting surface toward the periphery of the facing surface. A substrate mounting base on which the back surface and the mounting surface are in contact with each other and the substrate is mounted, wherein the substrate is in the region not contacting the mounting surface on the back surface. The second light source is mounted in a region outside the region where one light source is mounted.

  According to the illumination device of the present invention, the first light source is mounted on the first light-emitting surface that is the front surface, and the second light source is mounted on the second light-emitting surface that is the back surface. The outer surface has a mounting surface smaller than the area of the back surface, an opposing surface larger than the area of the mounting surface, and a side surface extending from the periphery of the mounting surface toward the periphery of the opposing surface, and the back surface and the mounting surface And a substrate mounting base on which the substrate is mounted, and the substrate is mounted with the second light source in a region outside the region where the first light source is mounted in the region where the substrate does not contact the back mounting surface. Therefore, light distribution of 180 degrees or more with respect to the opposing surface can be realized with a simple configuration.

1 is a structural diagram of a lighting device 100 according to Embodiment 1. FIG. FIG. 3 is a plan view of the lighting device 100 according to Embodiment 1 with the translucent globe 10 removed. FIG. 3 is a schematic diagram of an optical path of lighting apparatus 100 according to Embodiment 1. FIG. 6 is a structural diagram of an illumination device 100c according to Embodiment 2. It is the schematic of the optical path of the illuminating device 100c which concerns on Embodiment 2. FIG.

Embodiment 1 FIG.
(1) First embodiment (FIGS. 1, 2, and 3)
FIG. 1 is a structural diagram of the illumination device 100 according to the first embodiment. FIG. 2 is a plan view of the lighting device 100 according to Embodiment 1 with the translucent globe 10 removed (viewed from the direction P in FIG. 1). FIG. 3 is a schematic diagram of an optical path of the illumination device 100 according to the first embodiment. The structure of the illuminating device 100 which concerns on Embodiment 1 is demonstrated using FIGS.

  As shown in FIG. 1, the illuminating device 100 which concerns on this Embodiment is provided with the nozzle | cap | die part 7, the outer shell part 60, the translucent glove 10, the level | step-difference part 40, and LED board 3a, 3b. LED board 3 (3a, 3b) mounts LED element 8 (8a, 8b) on light emitting surface 31 (31a, 31b).

  The LED substrates 3a and 3b are fixed by contacting surfaces (non-light emitting surfaces 32a and 32b) that are not the light emitting surfaces 31a and 31b. The LED substrates 3a and 3b in which the surfaces (non-light emitting surfaces 32a and 32b) that are not the light emitting surfaces 31a and 31b are fixed in contact with each other may be referred to as the LED substrate 3. The LED substrate 3 is an example of a substrate. The light emitting surface 31a of the LED substrate 3a is an example of the surface of the substrate, and the light emitting surface 31b of the LED substrate 3b is an example of the back surface of the substrate.

  The LED substrate 3 is installed in a housing made of a polycarbonate translucent globe 10 that covers the light emitting surface 31 of the LED substrate 3 on which the LED element 8 is mounted, an outer portion 60, and a base portion 7. A lighting circuit board (not shown) for lighting the LED is installed inside the outer portion 60 forming the casing.

  The main body flat plate 51 on the surface of the outer shell 60 on the translucent globe 10 side is made of aluminum. The main body flat plate 51 is in a plane where the translucent globe 10 and the lighting device main body 50 are joined.

  The illuminating device body 50 includes a lighting circuit board installed inside the outer portion 60, the outer portion 60, the base portion 7, the main body flat plate 51, and the like.

  The translucent globe 10 is installed so as to wrap a stepped portion 40 described later and the LED substrate 3 attached to the stepped portion 40. The translucent glove 10 is made of polycarbonate, for example. The translucent globe 10 is provided with a globe overhanging portion 11 that projects 360 ° around the radius S of the main body plane plate (see FIG. 1).

  The light diffusing film 2 is formed on the inside (inner surface) of the translucent globe 10 by applying a light diffusing reflector such as titanium oxide that diffuses and reflects light and a light diffusing agent. Any material such as silica or alumina may be used for the light diffusion film 2 as long as it reflects and diffuses light. Further, the resin itself may be frosted or may be a resin added with a light diffusing agent.

  As described above, the housing includes the translucent globe 10, the outer portion 60, and the base portion 7. The outer portion 60 also serves as an aluminum radiator that cools the LED element 8, and includes a plurality of radiators 61.

  LED substrates 3a and 3b on which the LED elements 8a and 8b are mounted are installed in the housing. A lighting circuit board (not shown) for LED lighting is installed inside an outer portion 60 (heat radiator) forming a casing.

Let the surface of LED board 3 (3a, 3b) be az direction, and let the center axis | shaft of the illuminating device 100 be an x direction.
x: substrate surface vertical (illumination device axis) direction of LED substrate 3 (3a, 3b) z: substrate surface horizontal direction of LED substrate 3 (3a, 3b)

  The disk surface (main body flat plate 51) on the translucent globe 10 side of the outer shell 60 is made of aluminum. The LED boards 3a and 3b on which the LED elements 8a and 8b are mounted are provided on a step portion 40 (an example of a board mounting base) provided on the main body plane plate 51 of the lighting device 100.

  The stepped portion 40 is a substrate mounting surface 44 (an example of a mounting surface) that is smaller than the area of the light emitting surface 31b (back surface of the substrate) of the LED substrate 3b, and a bottom 45 (an example of the facing surface) that faces the substrate mounting surface 44. And a bottom 45 larger than the area of the board mounting surface 44. The step portion 40 includes a side surface that widens from the periphery of the substrate mounting surface 44 toward the periphery of the bottom portion 45. The stepped portion 40 is an example of a board mounting base on which the LED board 3 is mounted by bringing the board mounting surface 44 into contact with the light emitting surface 31b (back surface of the board) of the LED board 3b.

  In the LED substrate 3, the LED element 8b (light source) is mounted in a region where the substrate mounting surface 44 is not in contact with the light emitting surface 31b (back surface of the substrate) of the LED substrate 3b.

  As shown in FIG. 1, the side surface of the stepped portion 40 is a tapered surface 41 that expands in a tapered shape, and is a reflective surface that reflects light emitted from the LED element 8 b and allows the translucent globe 10 to pass.

  The stepped portion 40 has a tapered surface 41 (an example of a side surface) from the main body flat plate 51 toward the LED substrate 3 (3a, 3b), and has a conical shape. The stepped portion 40 includes a tapered surface 41 (tapered portion) that extends in a tapered shape on the side opposite to the translucent globe 10.

  The step portion 40 is made of, for example, a heat conductive polybutylene terephthalate resin. A light diffusing agent is applied to the tapered surface 41 (tapered portion) of the stepped portion 40.

  As shown in FIG. 2, the board attachment surface 44, the bottom 45, the LED boards 3a and 3b, and the main body plane plate 51 are all circular. It arrange | positions so that the center of the board | substrate mounting surface 44, the center of the bottom part 45, LED board 3a, 3b, and the center of the main body plane board 51 may overlap. The board mounting surface 44 is in contact with the central area of the light emitting face 31b (back face of the board) of the LED board 3b, and the LED element 8b is the center of the light emitting face 31b (back face of the board) of the LED board 3b. It is implemented so as to surround the area.

  As shown in FIG. 2, eight LED elements 8b are mounted in the vicinity of the periphery of the light emitting surface 31b so as to surround a region where the substrate mounting surface 44 is in contact. Further, eight LED elements 8a are mounted on the light emitting surface 31a of the LED substrate 3a so as to surround the center of the light emitting surface 31a of the LED substrate 3a.

  The translucent globe 10 has a ring-shaped cross section by a plane parallel to the substrate mounting surface 44. As shown in FIG. 1, the LED substrate 3 is flush with the maximum diameter portion (also referred to as the maximum diameter cross section) having the largest diameter among the cross sections of the translucent globe 10 parallel to the substrate mounting surface 44. Attached to.

  The LED boards 3a and 3b are arranged so that a line x connecting the center position of the main body plane plate 51 of the lighting device 100 and the top of the translucent globe 10 is located at or near the center of the LED boards 3a and 3b. . Further, the LED substrates 3 a and 3 b are arranged in the portion of the maximum diameter of the globe projecting portion 11.

  As shown in FIG. 2, the LED substrates 3a and 3b are circular, and a plurality of (for example, eight) LED elements 8a are mounted on the surface (the light emitting surface 31a of the LED substrate 3a). Then, a plurality of (for example, eight) LED elements 8b are mounted in a ring shape around the back surface (light emitting surface 31b of the LED substrate 3b).

  LED board 3 (3a, 3b) according to the present embodiment is made of aluminum. As shown in FIG. 1, one metallic LED substrate 3 is manufactured by combining the non-light emitting surface 32 a of the LED substrate 3 a and the non-light emitting surface 32 b of the LED substrate 3 b. By combining the non-light emitting surfaces 32 of the two substrates (LED substrate 3a and LED substrate 3b), the LED elements 8 can be arranged on both surfaces.

  The surface of the substrate is the upper surface, which is the light emitting surface 31a of the LED substrate 3a and the non-light emitting surface 32b of the LED substrate 3b that appears to protrude from the outer periphery thereof. The diameter M (see FIG. 2) of the LED substrate 3a is smaller than the diameter L (see FIG. 2) of the lower surface (light emitting surface 31b of the LED substrate 3b) which is the back surface of the substrate.

  As shown in FIG. 2, the radius L of the LED substrate 3 b is preferably 1/2 to 3/4 of the radius H of the main body plane plate 51. The radius L may be two-thirds the length of the radius H. The radius L may be a length other than one-half to three-fourths of the radius H.

  As shown in FIG. 2, the radius T of the board mounting surface 44 is preferably half to three quarters of the radius L of the LED board 3b. The radius T may be two-thirds the length of the radius L. Further, the radius T may be a length other than one-half to three-fourths of the radius L.

  If the ratio of the substrate mounting surface 44 to the light emitting surface 31b of the LED substrate 3b is too small, the heat dissipation of the LED substrate 3 will be insufficient. Further, if the ratio of the board mounting surface 44 to the light emitting surface 31b of the LED board 3b is too large, the area where the LED element 8b is mounted becomes too narrow, and the brightness cannot be secured.

  Moreover, it is preferable that the main body flat board 51 and the bottom part 45 are substantially equal. In FIG. 2, when the illumination device 100 is viewed from the P direction, the main body flat plate 51 is slightly larger by the R1 region. It is assumed that the translucent globe 10 is attached to the annular R1 region, and the R1 region is actually hidden as shown in FIG. Thereby, all the light emitted from the LED element 8b passes directly through the translucent globe 10 or is reflected by the tapered surface 41 of the stepped portion 40 and passes through the translucent globe 10, so that light is wasted. Absent.

  In FIG. 2, a circular region surrounded by a dotted line is a region where the substrate mounting surface 44 of the stepped portion 40 and the light emitting surface 31 b (substrate back surface) of the LED substrate 3 b are in contact with each other. As shown in FIGS. 1 and 2, the LED substrate 3 (3a, 3b) is an LED element that emits light from the light emitting surface 31a of the LED substrate 3a in the direction of the translucent globe 10 (see above (see FIG. 1)). 8a is mounted on the light emitting surface 31a of the LED substrate 3a. Further, the LED element 8b that emits light in the direction from the light emitting surface 31b of the LED substrate 3b to the main body flat plate 51 is placed in a region that is not in contact with the substrate mounting surface 44 in the region of the light emitting surface 31b of the LED substrate 3b. Implement.

  Of the region of the light emitting surface 31b of the LED substrate 3b, a portion where the substrate mounting surface 44 is not in contact is defined as a substrate protruding portion 35 protruding from the peripheral edge of the substrate mounting surface 44 of the stepped portion 40 (FIG. 1, FIG. 2). That is, the LED element 8 b that irradiates light from the light emitting surface 31 b of the LED substrate 3 b in the direction of the main body flat plate 51 (downward) is mounted on the substrate extending portion 35.

  An angle θ1 formed by the tapered surface 41 of the stepped portion 40 and the main body flat plate 51 (z direction) is 40 degrees to 60 degrees, but 40 degrees to 50 degrees is preferable. The angle θ2 formed by the tapered surface 41 of the stepped portion 40 and the LED substrate (z direction) is 140 degrees to 120 degrees, but 140 degrees to 130 degrees is preferable.

  The angle θ1 formed by the taper surface 41 of the stepped portion 40 and the main body flat plate 51 (z direction) is more preferably 45 ° among 40 ° to 50 °. Further, the angle θ2 formed by the tapered surface 41 of the stepped portion 40 and the LED substrate (z direction) is more preferably 135 degrees out of 140 degrees and 130 degrees.

  As described above, in the lighting device 100 of the present embodiment, one LED substrate 3 in which the LED elements 8 are mounted on both sides is manufactured by bonding the two LED substrates 3a and 3b. However, a double-sided mounting type substrate may be used. In that case, the area of the double-sided mounting type substrate is designed to be the same as the area (radius L) of the LED substrate 3b.

  A bottom portion 45 (bottom surface) of the stepped portion 40 is attached to the main body plane plate 51. The area (radius S) of the bottom 45 of the stepped portion 40 is the same as or slightly smaller than the area (radius H) of the main body flat plate 51. A taper surface 41 (slope) is formed from the top of the step portion 40 (substrate mounting surface 44) toward the bottom portion 45 of the step portion 40, and the bottom 45 of the step portion 40 is attached to the main body flat plate 51.

  On the LED substrate 3 (3b), there is a substrate overhanging portion 35 overhanging from the stepped portion 40. The board overhanging portion 35 is a portion of the area of the light emitting surface 31 (31b) of the LED board 3 (3b) that protrudes 360 degrees from the board mounting surface 44 (top) of the stepped portion 40.

  The LED element 8a is mounted on the surface (light emitting surface 31a) on the translucent globe 10 side (upper side) of the LED substrate 3 (3a), and the substrate protrusion on the stepped portion 40 side (lower side) of the LED substrate 3 (3b). The LED element 8b is mounted on the back surface of the portion 35 (the light emitting surface 31b of the LED substrate 3b). That is, the LED elements 8 are mounted on both sides of the LED substrate 3.

  FIG. 3 shows a schematic diagram of an optical path by the LED elements 8 arranged on each surface of the LED substrate 3 according to the present embodiment.

  The light L1 emitted from the LED element 8a directly reaches the light diffusion film 2 and the light transmitting globe 10, is diffused by the light diffusion action of the light diffusion film 2 and the light transmitting globe 10, and is irradiated to the outside.

  The light L2 emitted from the LED element 8b reaches the tapered surface 41 of the step portion 40 and is reflected to take the optical path L21. L21 reaches the light diffusing film 2 and the translucent globe 10, diffuses by the light diffusing action of the light diffusing film 2 and the translucent globe 10, and is irradiated to the outside.

  The light L3 emitted from the LED element 8b reaches the tapered surface 41 of the stepped portion 40 and is reflected to take the optical path of L31. L31 reaches the light diffusing film 2 and the translucent globe 10, diffuses by the light diffusing action of the light diffusing film 2 and the translucent globe 10, and is irradiated to the outside.

  The LED light disposed on both sides of the LED substrate by the globe overhanging portion 11, the light diffusing film 2 (light diffusive reflecting agent) and the light diffusing agent applied inside the translucent globe 10 and the tapered stepped portion 40, As described above, the optical path is as shown in FIG. 3, and light distribution of 180 ° or more can be realized, and more light can be distributed in the z direction.

  Illumination apparatus 100 according to the present embodiment includes a substrate on which a light source is mounted, a heat radiator that cools the light source, a lighting circuit board that lights the light source, and a translucent glove that covers the light emitting surface of the light source. The light source is mounted on a substrate provided on a step portion provided on a plane of the illumination device that joins the globe and the illumination device main body, and the substrate protrudes from the step portion. An overhang portion is provided, and a light source is mounted on both the surface of the substrate on the translucent globe side and the surface of the overhang portion on the stepped portion side of the substrate. Therefore, according to the lighting device 100 according to the present embodiment, the light source is mounted on the surface of the projecting portion on the stepped portion side of the substrate, so that the translucent globe and the lighting device main body are joined on the plane. Light is also emitted in the direction of the anti-translucent globe, and 180 or more light distributions can be realized.

  In the lighting device 100 according to the present embodiment, the position of the substrate on which the light source is mounted is the center of a line connecting the center position of the plane of the lighting device that joins the globe and the lighting device body and the top of the globe. It is provided in the vicinity. Therefore, according to the illumination device 100 according to the present embodiment, by providing the substrate on which the light source is mounted at the center of the translucent globe, light is also emitted toward the base portion of the translucent globe, and 180 degrees or more. Can be realized.

  The illumination device 100 according to the present embodiment is characterized in that the stepped portion extends in a tapered shape on the side opposite to the translucent globe. Therefore, according to the lighting device 100 according to the present embodiment, the base of the translucent glove is formed on the plane joining the main body by expanding the stepped portion in a tapered shape on the side opposite to the translucent glove. Light is also emitted in the direction, realizing a light distribution of 180 ° or more, and more light can be distributed in the plane direction than in the past. In addition, the tapered stepped portion serves as a pedestal for mounting a substrate on which light sources are mounted on both sides in a portion above the plane where the translucent globe and the illuminating device body are joined, and the tapered stepped portion. The step portion also serves as a reflection portion that reflects the light source on the lower surface of the substrate overhanging portion, and the light source is mounted on the overhanging portion other than the surface that is fixed in contact with the stepped portion on the lower surface of the substrate. Despite being mounted on both sides, the light source substrate can be easily and firmly fixed to the stepped portion, and the stepped portion also serves as the reflecting portion, thereby providing a reflecting portion directly under the substrate. Therefore, the above light distribution can be realized.

  The illumination device 100 according to the present embodiment is characterized in that the tapered surface of the tapered step portion is a curved surface. Therefore, according to the illumination device 100 according to the present embodiment, it is possible to distribute more light in the planar direction by reflecting light by forming the tapered stepped portion into a curved surface.

  The illumination device 100 according to the present embodiment is characterized in that the step portion is made of a member that reflects light. Therefore, according to the illuminating device 100 of this Embodiment, when the taper surface of a taper-shaped level | step-difference part reflects light, it distributes more light to the base part direction of the translucent glove, and the said plane direction. I can do it.

  The illumination device 100 according to the present embodiment is characterized in that the step portion is made of a member that diffuses light. Therefore, according to the illumination device 100 of the present embodiment, the tapered surface of the tapered step portion diffuses light, thereby distributing more light in the base direction of the translucent globe and the plane direction. I can do it.

  The illumination device 100 according to the present embodiment is characterized in that the stepped portion is made of metal that polishes the surface and reflects light. Therefore, according to the illumination device 100 of the present embodiment, the stepped portion is made of metal that reflects light by polishing the surface, thereby distributing more light in the base direction of the translucent globe and the plane direction. Can shine.

  The illumination device 100 according to the present embodiment is characterized in that the step portion also serves as a heat radiator that cools the light source. Therefore, according to the illuminating device 100 of this Embodiment, the level | step-difference part can also thermally radiate a more efficient light source by serving as the heat radiator which cools a light source. Further, in the case of the same heat dissipation effect, the amount of the heat dissipation member can be reduced.

  The lighting device 100 according to the present embodiment is characterized in that the light source is disposed on both surfaces of the substrate by aligning the bottom surfaces of the two substrates in which the light source is disposed on one surface of each substrate. Therefore, according to the illumination device 100 of the present embodiment, the substrates can arrange the light sources on both sides of the metallic substrate by matching the bottom surfaces of the two substrates in which the light sources are arranged on one side of each substrate.

Embodiment 2. FIG.
(2) Second embodiment (FIGS. 4 and 5)
FIG. 4 is a structural diagram of the illumination device 100c according to the present embodiment. FIG. 5 is a schematic diagram of an optical path of the illumination device 100c according to the present embodiment.

  In the present embodiment, points different from the first embodiment will be mainly described below. The difference between the lighting device 100c according to the present embodiment and the lighting device 100 according to the first embodiment is mainly the shape of the concave curved surface portion 41c of the stepped portion 40c and the shape of the translucent globe 10c. Other identical components are denoted by the same reference numerals and description thereof is omitted.

  The translucent glove 10c of the present embodiment is hemispherical. The translucent glove 10 c does not have the glove overhanging portion 11 (see FIG. 1) that projects outward from the diameter of the main body flat plate 51.

  LED board 3 (3a, 3b) is provided in the center of the line x which connects the center position of the main body plane board 51 of the illuminating device 100c, and the top part of the translucent glove 10c, or center vicinity.

  The stepped portion 40c is made of aluminum, and also serves as an aluminum radiator that cools the LED elements 8a and 8b. The step portion 40 c forms a concave curved surface when viewed from any direction of 360 degrees in the z direction of the main body flat plate 51. The stepped portion 40c has a trumpet shape and a Mt. Fuji shape, and has a gentle skirt.

  The concave curved surface portion 41c forming the concave curved surface of the stepped portion 40c has a reflective surface 43c having a mirror-like surface by polishing so as to reflect light. The concave curved surface portion 41c of the step 40c portion functions as a concave mirror.

  The initial angle θ3 formed by the concave curved surface portion 41c of the stepped portion 40c and the main body plane plate 51 (z direction) is 0 to 10 degrees. The initial angle θ4 formed by the concave curved surface portion 41c of the stepped portion 40c and the LED substrate 3 (3a, 3b) (z direction) is 90 degrees to 100 degrees. The angle formed by the concave curved surface portion 41c of the stepped portion 40c and the main body flat plate 51 (z direction) gradually increases from θ3, and then becomes a steep slope to form the concave curved surface portion 41c of the stepped portion 40c and the LED substrate 3. The angle θ4 formed by (3a, 3b) (z direction) is obtained.

  The translucent globe 10c is made of polycarbonate resin, and a light diffusing agent is added. The translucent glove 10c may be the same as the translucent glove 10 described in the first embodiment.

  FIG. 5 shows a schematic diagram of an optical path by the LED elements 8 (8a, 8b) arranged on each surface of the LED substrate 3 (3a, 3b) according to the present embodiment.

  The light L4 emitted from the LED element 8a directly reaches the translucent globe 10c, is diffused by the light diffusing action of the translucent globe 10, and is irradiated to the outside.

  The light L5 emitted from the LED element 8b reaches the concave curved surface portion 41c of the stepped portion 40c, is reflected by the concave mirror action, and takes the optical path of L51. L51 reaches the translucent globe 10c, is diffused by the light diffusing action of the translucent globe 10c, and is irradiated to the outside.

  The light L6 emitted from the LED element 8b reaches the concave curved surface portion 41c of the stepped portion 40c, is reflected by the concave mirror action, and takes the optical path of L61. L61 reaches the translucent globe 10c, is diffused by the light diffusing action of the translucent globe 10c, and is irradiated to the outside.

  LED elements 8a disposed on both sides of the LED substrate 3 (3a, 3b) by a resin-made globe (translucent globe 10c) to which a light diffusing agent is added and a tapered step portion 40c having a curved surface (concave surface). , 8b has an optical path as shown in FIG. 5, and a light distribution of 180 ° or more can be realized, and more light can be distributed in the z direction.

  The illumination device 100c according to the present embodiment is characterized in that the tapered surface of the tapered step portion is a curved surface. Therefore, according to the illumination device 100c according to the present embodiment, it is possible to distribute more light in the planar direction by reflecting light with a tapered stepped portion as a curved surface (concave surface).

  The illumination device 100c according to the present embodiment is characterized in that the stepped portion is made of metal that polishes the surface and reflects light. Therefore, according to the illuminating device 100c which concerns on this Embodiment, a level | step-difference part grind | polishes the surface, and makes it metal from the light reflection, Therefore, more light is transmitted to the base direction of a translucent glove, and the said plane direction. Can distribute light.

  Although Embodiments 1 and 2 have been described above, these two embodiments may be combined. Alternatively, one of these embodiments may be partially implemented. Alternatively, these two embodiments may be partially combined.

  In the above-described form, a substrate having a front surface and a back surface, a mounting surface that is smaller than the area of the back surface, a facing surface that faces the mounting surface and is larger than the area of the mounting surface, and the mounting surface A side surface that widens from the periphery of the counter surface toward the periphery of the facing surface, and includes a substrate mounting base that attaches the substrate by contacting the mounting surface to the back surface, An example of a lighting device in which a light source is mounted in a region where the mounting surface is not in contact has been described.

  Moreover, the said mounting surface contact | abutted to the center area | region of the area | regions of the said back surface, and demonstrated the example of the illuminating device mounted so that the said light source might surround the said center area | region.

  The substrate mounting table includes a translucent globe that covers the substrate mounting table and the substrate mounted on the substrate mounting table, and the side surface of the substrate mounting table reflects the light emitted from the light source and passes through the globe. An example of a lighting device that is a reflecting surface to be performed has been described.

  In addition, the globe has an annular cross section by a plane parallel to the mounting surface, and the substrate is an example of a lighting device that is mounted on the same plane as the maximum diameter cross section having the maximum diameter among the cross sections of the globe. Explained.

  Moreover, the side surface of the said board | substrate mounting base demonstrated an example of the illuminating device which is a taper shape.

  Moreover, the said board | substrate mounting base demonstrated an example of the illuminating device whose angle of the said opposing surface and the said side surface is 40 to 60 degree | times.

  Moreover, the example of the illuminating device whose side surface of the said board | substrate mounting base is a concave curved surface was demonstrated.

  In addition, the mounting surface, the facing surface, and the substrate are circular, and the radius of the substrate is 1/2 to 3/4 of the radius of the facing surface, An example of a lighting device in which the radius is 1/2 to 3/4 the radius of the substrate has been described.

  2 light diffusion film, 3, 3a, 3b LED substrate, 7 base part, 8, 8a, 8b LED element, 10, 10c translucent globe, 11 globe overhang, 31 light emitting surface, 32 non-light emitting surface, 35 substrate Overhang part, 40, 40c Step part, 41 Tapered surface, 41c Concave surface part, 42 Reflecting surface, 43 Light diffusion film, 43c Reflecting surface, 44 Substrate mounting surface, 45 Bottom part, 50 Illuminating device main body, 51 Main body flat plate, 60 outer part, 61 radiator, 100, 100c lighting device.

Claims (7)

A double-sided mounting type substrate in which a first light source is mounted on a first light-emitting surface as a front surface and a second light source is mounted on a second light-emitting surface as a back surface;
A mounting surface that is smaller than the area of the back surface, a facing surface that faces the mounting surface and is larger than the area of the mounting surface, and a side surface that extends from the periphery of the mounting surface toward the periphery of the facing surface. A board mounting table on which the back surface and the mounting surface are in contact with each other and the board is mounted;
With
The substrate is
The lighting device in which the second light source is mounted in a region outside the region in which the first light source is mounted in a region of the back surface that does not contact the mounting surface. The mounting surface is in contact with a central region of the back surface region,
The lighting device according to claim 1, wherein the second light source is mounted so as to surround the central region. The lighting device includes a light-transmitting glove that covers the substrate mounting base and the substrate attached to the substrate mounting base.
The lighting device according to claim 1, wherein the side surface of the substrate mounting base is a reflecting surface that reflects light emitted from the light source toward the globe. The globe has a ring-shaped cross section by a plane parallel to the mounting surface,
The lighting device according to claim 3, wherein the substrate is attached to the same plane as a maximum diameter section having a maximum diameter among the sections of the globe.   The lighting device according to claim 1, wherein the side surface is tapered.   The lighting device according to claim 1, wherein the side surface is a concave curved surface. The mounting surface, the facing surface and the substrate are circular,
The globe is joined to the periphery of the facing surface,
5. The lighting device according to claim 3, wherein a peripheral edge of the facing surface has a radius larger than that of the substrate and the mounting surface.

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