JP2009266780A - Luminous body and luminaire - Google Patents

Abstract

A light-emitting body and a lighting fixture that are less likely to be dazzled are provided.
A light emitting element comprising a semiconductor; a light diffusing means provided in a region including the light emitting portion of the light emitting element; and a light which is provided around the light emitting element and does not pass through the light diffusing means. The light-emitting body 10 which comprises the reflector 13 which mainly reflects ;; is comprised.
[Selection] Figure 1

Description

  The present invention relates to a light emitter and a lighting fixture using a semiconductor such as a light emitting diode as a light source.

  This type of lighting fixture using a light emitting diode as a light source consumes less power and is used for downlights, spotlights, and the like from the viewpoint of energy saving. In addition to these indoor lighting fixtures, in recent years, those used as light sources for outdoor lighting fixtures such as crime prevention lights and street lights have been proposed (for example, Patent Literature 1 and Patent Literature 2).

Patent Document 1 discloses a plurality of white light emitting diodes arranged in a polygonal shape so that the white light emitting diodes are directed to the lower surface side of a plurality of planar printed circuit boards to which a plurality of white light emitting diodes are attached, and are directed in multiple directions. It is an outdoor lighting fixture. Patent Document 2 discloses an outdoor / indoor environment in which a plate-like heat conduction plate on which a plurality of light-emitting diodes are placed on one side and a thin plate-like diffuse transmission layer disposed apart from one side of the heat conduction plate are provided. A surface-emitting light source that is optimal for general lighting fixtures and signboards is shown.
JP 2004-200102 A JP 2000-30521 A

  Light emitting diodes have higher brightness than incandescent bulbs and fluorescent lamps, and as shown in Patent Document 1, when many light emitting diodes are used and arranged, a person looks at a lighting fixture in the lighting space. In such a case, the illumination is easy to feel glare. In particular, in the case of outdoor lighting, since the surroundings are dark and the back luminance is low, there is a risk that dwellers such as neighboring houses may feel dazzling. In addition, in order to compensate for the lack of light emission efficiency of light emitting diodes, particularly in outdoor lighting fixtures and the like, if the LED rated full power is applied to cope with it, further glare will occur.

  Further, in Patent Document 2, a thin plate-like diffuse transmission layer is provided apart from one surface of a heat conducting plate on which a light emitting diode is placed, and the light emitted from a plurality of light emitting diodes is averaged to obtain a surface light emission such as a signboard. The brightness of the light source is made uniform. This makes it possible to reduce glare, but because it is a surface emitting light source such as a signboard, perform light distribution control to adapt it to various lighting environments such as outdoor crime prevention lights and street lights. I can't. Moreover, since the light radiated from the light emitting diode is blocked by the diffusive transmission layer, there is a problem that light loss occurs and the efficiency of the appliance is lowered.

  For this reason, in this type of luminaire using a semiconductor such as a light-emitting diode as a light source, it can satisfactorily perform indoor lighting in a house, office, store, etc., and outdoor space lighting in a park, road, etc. There is a strong demand for realizing a light-emitting body and a lighting fixture that do not feel dazzling when viewed.

  The present invention aims to solve the above-described problems and problems, and provides a light-emitting body and a lighting fixture that are less susceptible to glare.

  The light-emitting element according to claim 1 is a light-emitting element made of a semiconductor; a light diffusing unit provided in a region including the light emitting part immediately above the light-emitting element; and provided around the light-emitting element and passing through the light diffusing unit. A reflector that mainly reflects light that has not been reflected.

  According to the present invention, the light diffusing means provided in the region including the portion directly above the light emitting portion of the light emitting element can diffuse the light emitted from the light emitting element and can constitute a light emitting body that is less susceptible to glare. . By providing the light diffusing means in a region including the portion directly above the light emitting portion of the light emitting element, it is possible to minimize the portion that blocks light and minimize light loss. Light that is emitted from the light-emitting part of the light-emitting element that is the light-emitting source by the reflector and light that is slightly diffused by other diffusing means can be mainly controlled, and desired light distribution can be efficiently performed. Can be obtained.

  In the present invention, a light emitting element made of a semiconductor, such as a light emitting diode or a semiconductor laser, is preferably used. The light emitting device may be configured as a single unit, or may be configured as a module in which a plurality of light emitting devices are arranged in a straight line or a curve, or a plurality of light emitting devices may be arranged in a matrix. Furthermore, the light emitting elements may be arranged in a circular shape, an elliptical shape, an oval shape, or the like by using a plurality of light emitting elements. The plurality of light emitting elements preferably have the same function and performance, but may be composed of light emitting elements having different functions and performance.

  The light diffusing means may be provided only directly above the light emitting part, or may be provided in an area including the periphery immediately above and immediately above the light emitting part, and all means provided in the area including immediately above the light emitting part of the light emitting element are allowed. . Furthermore, at least the portion of the light emitting element facing directly above the light emitting portion may be configured to have a greater light diffusion effect than the other portions, and the portion that blocks the light emitted from the light emitting element is reduced as much as possible. Any means capable of minimizing losses is acceptable.

  The light diffusing means is preferably configured by performing a light diffusing process on the translucent member. Light diffusion treatment is performed by mixing diffusion beads into the translucent member, frosting or forming irregularities on the surface of the translucent member, and adjusting the thickness of the translucent member by kneading the diffusing material, etc. It may be configured. Further, for example, the region including the portion directly above the light-emitting portion of the light-emitting element may be configured with a member having low translucency, or a member that does not have translucency in part, and configured to diffuse light.

  The light diffusing means may have a light control function by a prism or the like in accordance with the diffusion function. The light diffusing means is preferably a colorless transparent body, but may be composed of a colored translucent material in which a translucent member is colored, or a colored diffusing bead or diffusing material is mixed.

  The light diffusing means may be constituted by a cover member or a cap member provided in a region including the portion directly above the light emitting portion of the light emitting element, or may be constituted by a coating treatment with a paint or the like or a molding with a synthetic resin, a heat shrinkable tube or the like You may comprise by covering.

  The light diffusing means may be provided over the entire light emitting elements or a single light emitting element may be provided for each of the light emitting elements provided in plurality. The light diffusing means may have a performance common to all of the plurality of light emitting elements, or may be configured to have different performance corresponding to the light emitting elements.

  The reflector is preferably provided around the light-emitting element such as both sides so that the direct light emitted from the light-emitting element and the light slightly diffused by other light diffusion means can be effectively controlled. All the configurations and means for efficiently obtaining a desired light distribution by controlling the light emitted from the light emitting part of the light emitting element as the light emitting source are allowed. The

  The reflector may be made of a metal such as stainless steel or aluminum, or may be made of a white synthetic resin such as PBT (polybutylene terephthalate), and the synthetic resin or metal may be further mirror-finished or semi-mirror-finished. It may be formed. The reflector may be formed integrally with the support that supports the light emitter, or may be configured separately from the support.

  According to a second aspect of the present invention, in the light emitter according to the first aspect, the light diffusing means is provided so as to cover the light emitting element with a translucent member, and at least a portion facing directly above the light emitting portion of the light emitting element, It is characterized in that the light diffusing action is larger than that of the other parts.

  In the present invention, the translucent member may be translucent synthetic resin such as silicone resin, acrylic resin, and epoxy resin, and glass. The translucent member adjusts the particle size and mixing density of the diffusing beads, adjusts the roughness by forming the frosting process and unevenness, and adjusts the thickness of the translucent member incorporating the diffusing material, etc. Thus, it is allowed that at least a portion of the light emitting element facing the light emitting portion is configured to have a greater light diffusion effect than the other portions.

  According to a third aspect of the present invention, there is provided a lighting device according to the first or second aspect; a light-emitting body according to claim 1; a light-control body provided so as to cover the light-emitting body; and a light-emitting body and an apparatus body that supports the light-control body. It is characterized by comprising.

  In the present invention, the luminaire is an indoor lighting device that illuminates indoor rooms, corridors, passages, and the like, even outdoor lighting devices such as crime prevention lights, street lights, floodlights, and garden lights used for lighting roads, parks, etc. It may be a lighting fixture. The light control body provided so as to cover the light emitting body may be formed of a transparent member such as glass or acrylic resin forming a globe, or may be formed of a translucent material such as milky white. The instrument body that supports the light emitter and the light control body is allowed to be made of, for example, a metal made of aluminum die casting or the like, or a synthetic resin that does not transmit light.

  According to the first aspect of the present invention, it is possible to provide a light-emitting body that can diffuse light emitted from the light-emitting element and hardly feel dazzling, and to suppress light loss to a minimum and to achieve a desired arrangement. Light can be obtained efficiently.

  According to the invention of claim 2, the light diffusing means is provided so as to cover the light emitting element with the translucent member, and at least the part facing the light emitting part of the light emitting element has a larger light diffusing action than the other part. With this configuration, it is possible to provide a light-emitting body that is difficult to feel glare with a simple configuration.

  According to the third aspect of the present invention, it is possible to provide a lighting apparatus that can diffuse light emitted from the light emitting element and hardly feel dazzling, and can suppress light loss to a minimum and can achieve a desired arrangement. Light can be obtained efficiently.

  Hereinafter, the configuration of a light emitter using a light emitting diode as a light source and a lighting fixture using the light emitter will be described with reference to FIGS.

  First, the configuration of the light emitter 10 will be described. The light-emitting body 10 includes a light-emitting element 11 made of a semiconductor, a light diffusing unit 12 provided in a region including immediately above the light-emitting portion of the light-emitting element, and a reflector 13 provided around the light-emitting element.

  The light-emitting element 11 includes a light-emitting diode (hereinafter referred to as “LED”) that is a semiconductor light-emitting element. In this embodiment, the light-emitting element 11 includes a blue LED chip and a yellow phosphor excited by the blue LED chip. 11a is configured as a high-luminance, high-output light emitting element that emits white light. The light emitting element 11 mainly emits light in one direction, that is, in the direction of the optical axis oo of the light emitting element. Here, the optical axis oo is substantially perpendicular to the plate surface of the substrate 11b on which the light emitting element 11 is mounted (FIG. 1).

  The light emitting element 11 has a plurality of light emitting portions 11a on the substrate 11b made of a circuit wiring board having an elongated rectangular shape, with four light emitting elements in the present embodiment, the center line x− in the longitudinal direction of the substrate. A light source body 11c as a line module is configured by being arranged and mounted in a substantially straight line at regular intervals along x (FIG. 2C).

  The light source body 11c configured as described above is provided with a light diffusing means in a region including the portion directly above the light emitting portion 11a of each light emitting element 11. That is, as shown in detail in FIG. 1, 12 is a diffusing cover made of a translucent member that constitutes the light diffusing means of the present invention. And it is comprised in the cross-sectional substantially U-shape corresponding to the bottom part of the collar of the reflector 13 mentioned later. Further, the material is constituted by mixing transparent white transparent synthetic resin such as acrylic resin or epoxy resin with white diffusion beads 12a made of glass made of fine particles.

  The diffusion beads 12a are mixed with the beads 12a1 having a small particle diameter so as to increase the density in the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11, and the other portions B are The beads 12a2 having a slightly larger particle diameter are mixed so as to reduce the density. Accordingly, the diffusion cover 12 is configured such that the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11 has a larger diffusing action than the other portion B around the diffusion cover 12.

  The diffusion cover 12 configured as described above is covered so as to cover the entire light source body 11c configured as a line module. At this time, the portion A where the density is increased by mixing beads 12a1 having a small particle diameter is disposed so as to be positioned almost directly above the light emitting portion 11a of the light emitting element 11, and the joining portion between the inner surface of the diffusion cover and the substrate 11b Are fixed with a heat-resistant adhesive such as silicone resin or epoxy resin so as to be airtight.

  With the above configuration, as shown in FIG. 2, the light a having a high luminous flux along the optical axis oo emitted from the light emitting element 11 is efficiently diffused by the beads 12 a 1 mixed in the diffusion cover 12 (FIG. 2). Medium light beam c) and dazzling can be reduced. At the same time, the diffusion beads 12a are configured so that the mixing density of the other part B around the part A where the density of the light emitting part 11a is increased is lowered, so that the diffusion beads 12a go from the light emitting part 11a of the light emitting element 11 to the periphery. The light b emitted is partly diffused by the slightly larger particle size beads 12a2 to reduce glare (light ray d in the figure), and most of the light passes through the gaps between the beads 12a2 where the mixing density is low. It passes through and is emitted without being diffused. Thereby, the optical loss by the diffusion cover 12 is suppressed to the minimum while reducing the glare partially.

  The light source body 11c is further provided with a reflector 13 so as to face the light emitting element 11 and the diffusion cover 12, and the light emitter 10 of the present invention is configured. The reflector 13 is made of a metal plate such as stainless steel or aluminum, and has a bowl-shaped reflecting surface 13a having a substantially V-shaped cross section. The longitudinal center line xx of the substrate 11b of the light emitting element 11 having the above-mentioned linear shape is substantially aligned with the longitudinal center line yy of the reflector at the bottom of the reflector. Position and support (FIG. 2 (c)). That is, the diffusion cover 12 that is bonded and fixed integrally with the light source body 11c is matched with the bottom of the ridge of the reflector 13 and attached with fixing means such as screws or adhesive. Thereby, the light emitter 10 in which the light source 11c and the reflector 13 are integrated is formed. According to this configuration, the support that supports the light emitter 10 is formed integrally with the reflector 13. A plurality of the light emitters 10 configured as described above are prepared, 10 in this embodiment.

  With the above configuration, the reflective surface 13a of the reflector is provided symmetrically on both sides of the linear light emitting element 11 and the diffusion cover 12 so as to be opposite to each other. Light b emitted from the light emitting portion 11a toward the periphery and passing through the gap between the beads 12a2 having a low mixing density, in other words, the light not passing through the beads 12a2 having a low mixing density of the light diffusion means b is reflected mainly toward the optical axis oo of the light emitting element 11, and the lights c and d diffused by the light diffusing means 12 are also reflected by the reflecting surface 13a. As a result, it is possible to efficiently obtain a desired light distribution by controlling the non-diffused light b and the diffused lights c and d emitted from the light emitting element in the immediate vicinity of the light emitting element 11 as the light emitting source. It becomes. At the same time, the reflector 13 is also brightened by reflection of light, and the surroundings of the light emitting element 11 are brightened. For this reason, glare is further reduced compared with the case where the light emitting element which is a point light source exists alone on a dark background. Each reflector 13 is configured by finishing the reflecting surface into a mirror surface.

  In the figure, 11d is an insulating sheet provided between the bottom of the reflector 13 and the substrate 11b of the light source body 11c, and electrically insulates the substrate made of the circuit wiring board from the reflector made of metal. The insulating sheet is made of, for example, a silicone resin having a good thermal conductivity so that electrical insulation is achieved and heat generated from each LED of the light emitting element 11 is transmitted to the reflector 13 via the insulating sheet 11d to be dissipated. It may be.

  Next, the structure of the security light using the light emitter 10 configured as described above will be described. As shown in FIG. 3, reference numeral 20 denotes a security light which is a lighting fixture of the present invention. The light emitter 10 having the above-described configuration, a light control body 21 provided so as to cover the light emitter, a light support body, and a device that supports the light control body. The main body 22 is used.

  The light control body 21 is provided so as to cover the light emitting body 10 and is formed of a synthetic resin such as transparent acrylic, and is formed of a box body having a substantially V-shaped cross section in which the opening 20a is formed on one surface. The light control body 21 matches the opening 21a with the opening 22a of the instrument body 22, and covers the light emitting body 10 supported in the instrument body and the lighting device 30 housed in the narrow space on the left side of the instrument body. Thus, it is attached so that it can be attached and detached with a screw or the like.

  The instrument main body 22 is made of aluminum die casting, and is constituted by a box body having a substantially ship bottom shape with an opening 22a formed on one surface. The light emitter 10 described above is accommodated and supported in the instrument main body facing the opening 22a. To do. That is, in one space part of the instrument body, a wide space part on the right side in FIG. 3, the section made of a plate material such as stainless steel or aluminum and positioned substantially on the center line zz in the longitudinal direction of the instrument body has a substantially V-shaped cross section. A mounting plate 50 is supported.

  The mounting plate 50 constitutes a pair of mounting portions for arranging the plurality of light emitters 10 in the present invention. In other words, the back portions of the V-shaped tips face the opening 22a. A pair of opposing V-shaped sides 50a, 50a are fixed to the bottom of the ship bottom shape so as to be tilted while being gradually opened toward the bottom of the instrument body 22 in a symmetrical manner (FIG. 4). In this state, when the instrument body 22 is installed on a column or the like, both sides 50a, 50a of the V-shape are inclined symmetrically while gradually opening upward, and the plate surfaces of both sides of the V-shape are symmetrical. Is located obliquely downward. In addition, the surface of the mounting plate 50 is configured to have a mirror finish to have a function of a reflecting plate.

  As shown in FIG. 3, the ten light emitters 10 to which the reflectors 13 are attached are supported on the mounting plate 50 fixed to the instrument body 22 as described above. That is, on the center line xx (FIG. 2C) in the arrangement direction of the four light emitting elements 11 in each light emitting body 10 with respect to the pair of V-shaped side portions 50a and 50a opposed to each other. It arrange | positions at substantially equal intervals in the substantially orthogonal direction. Specifically, the ten light emitters 10 to which the reflectors 13 are attached are distributed to the left and right sides 50a and 50a of the V-shaped portion of the mounting plate 50, and are fixed so that they are approximately equidistant from each other. Is done. For example, the bottom of the reflector 13 is fixed to the mounting plate 50 by means such as spot welding. As a result, the ten light emitters 10 are distributed into five, and the irradiation directions are arranged so as to be substantially symmetrical with respect to the center line zz of the instrument body 22.

  In FIG. 5, reference numeral 60 denotes a support member made of a mounting bracket attached to one side of the appliance main body 22, that is, the lighting device 30, and the security light 20 configured as described above is supported by the support P or the like by the support member 60. Fix it. The opening 22a of the instrument body 22 and the opening 21a of the light control body 21 are configured to be fitted through a packing made of silicone resin or the like to maintain waterproofness. The light control body 21 is configured such that the light emitter 10 and the lighting device 30 can be inspected and repaired by removing screws.

  Next, the operation when the crime prevention light 20 configured as described above is used by being attached to a column P installed on the sidewalk side of the road as shown in FIGS. 5 (a) and 5 (b) will be described. First, the instrument body 22 is attached to the column P at a height of about 4.5 m by the support member 60. At this time, the instrument main body 22 is installed so that the center line zz is substantially horizontal, and is supported so that the longitudinal direction of the instrument main body is substantially along the transverse direction of the road A. Thus, each of the five light emitters 10 supported by the substantially V-shaped side portions 50a, 50a of the mounting plate 50 is positioned diagonally downward (in the road extending direction) symmetrically.

  When the light emitting elements 11 of the respective light emitters 10 are turned on in the above-described state, the light a along the optical axis oo emitted from each light emitting element 11 has a particle diameter mixed in the diffusion cover 12 closely. Diffused with small beads 12a1. At the same time, the light b radiated from the light emitting part 11a of the light emitting element 11 toward the surroundings is partially mixed with the beads 12a2 having a slightly larger particle diameter to reduce glare, and most of the light is mixed in density. Is transmitted through the gap between the low beads 12a2 without being diffused.

  Further, the light b that has not passed through the gap between the beads 12a2 and has not been diffused, in other words, the light b that has not passed through the beads 12a2 having a low mixing density of the light diffusing means, is provided around the reflector 13 in a symmetrical manner. Is reflected left and right so as to be directed to the optical axis oo of the light emitting element 11. At the same time, the lights c and d diffused by the diffusing cover 12 can also be reflected by the reflecting surface 13a, and the light emitted from each light emitter 10 is obliquely symmetrically left and right along each optical axis oo direction. Radiated downward (FIG. 4). At this time, the reflector 13 is also brightened because the diffused light is reflected.

  Thereby, it radiates | emits equally from the both sides | surfaces of the instrument main body 22 toward the right and left of the support | pillar P (toward the front side and back side in FIG.5 (b)), and the road surface of a sidewalk side and a roadway side is made into the extending direction of the road A. Illuminate and illuminate along. As a result of these actions, as in the light distribution state schematically shown in FIG. 5 (c), as a security light with a desired light distribution over a wide range from the lower region of the column P to the extending direction of the road A on the sidewalk side and the roadway side. Can be illuminated.

  As described above, according to the present embodiment, the diffusion beads 12a of the diffusion cover 12 have a density smaller than that of the beads 12a1 having a small particle diameter in the portion A facing the region immediately above and immediately above the light emitting portion 11a of the light emitting element 11. The other portion B in the periphery is mixed with beads 12a2 having a slightly larger particle diameter so as to have a low density, so that the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11 The portion A that faces the region including the diffusing action is larger than the other portion B around it.

  Thereby, the light a along the optical axis oo emitted from each light emitting element 11 is effectively diffused by the beads 12a1 densely mixed in the diffusion cover 12 (light ray c in the figure). In particular, the light a corresponding to a high luminous flux along the optical axis oo can be diffused efficiently. Thereby, even when a person looks up at a lighting device such as a security light from the bottom and directly looks at it, dazzling is reduced, and dazzling can be reduced for neighboring residents.

  Further, the light b radiated from the light emitting portion 11a of the light emitting element 11 toward the periphery is partially diffused by the beads 12a2 having a slightly larger particle diameter (light ray d in the figure) while reducing glare. The light in the portion is transmitted and emitted without being diffused through the gap between the beads 12a2 having a low mixing density. Thereby, light loss by the diffusion cover 12 is suppressed to a minimum while reducing glare in part, and a predetermined brightness can be maintained without reducing the appliance efficiency of the lighting fixture as much as possible. At the same time, the diffused light rays c and d are also reflected on the reflector 13 and become brighter, and the surroundings of the light emitting element 11 are brightened, so that the glare can be further reduced. Thus, it is possible to provide a light emitting body and a lighting fixture that are less likely to feel glare without reducing the appliance efficiency as much as possible. In particular, the light diffusing means can reduce glare with a simple structure in which diffusion beads are simply mixed in translucent synthetic resin or glass, and the mixing density is changed. And lighting fixtures can be provided.

  Since the reflecting surface 13a of the reflecting body 13 is symmetrically positioned on both sides of the light emitting body 10 so as to face the light emitting element 11 and the diffusion cover 12, the light is diffused through the gaps of the beads 12a2. In other words, the light b not transmitted through the beads 12 a 2 having a low mixing density of the light diffusing means is reflected toward the optical axis oo of the light emitting element 11 and diffused by the diffusion cover 12. The reflected lights c and d can also be reflected by the reflecting surface 13a in a predetermined direction. As a result, it is possible to efficiently obtain a desired light distribution by controlling the non-diffused light b and the diffused lights c and d emitted from the light emitting element in the immediate vicinity of the light emitting element 11 as the light emitting source. In lighting fixtures such as crime prevention lights, lighting can be performed with a wide range of light distribution from the lower area of the pillar P to the extending direction of the road A on the sidewalk side and the roadway side. Desired light distribution control can be performed, and indoor lighting in houses, offices, stores, and the like, and outdoor space lighting in parks, roads, and the like can be favorably performed.

  In particular, since light emitted from the light emitting element can be controlled in the immediate vicinity of the light emitting element 11 as a light emitting source, accurate and reliable light distribution control can be efficiently obtained with a simple configuration. Incidentally, for example, when light is controlled by forming a prism on a light control body (globe) provided so as to cover the entire light source, it is necessary to control the light emitted from the light source and already diffused, and the control area is also large. For example, in order to perform accurate and reliable light distribution control, a considerably large configuration is required.

  Furthermore, since the light emitter 10 is configured by mounting the reflector 13, the light leaking laterally from each light emitting element 11 can be reflected in the direction of the optical axis, so that the light can be effectively used. Illumination with light distribution can be performed, and light loss can be further suppressed.

  As described above, in the present embodiment, the diffusion beads 12a of the diffusion cover 12 are configured by the diffusion beads 12a having the same particle diameter, and the mixing density thereof is in the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a. You may comprise so that it may be made high and the other part B of the circumference | surroundings may be made low. The beads may be unified with a small particle size or may be unified with a large particle size. Further, as the mixing density goes from the part A to the part B, it may be configured so as to gradually decrease so as to form a gradation.

  In addition, as shown in FIG. 6 (a), the diffusion beads 12a may be provided only in a portion facing directly above the light emitting portion 11a. According to this, the light b radiated from the light emitting part 11a of the light emitting element 11 toward the surroundings is transmitted and radiated without being diffused at all other parts B other than immediately above, and the light from the diffusion cover 12 is emitted. Loss can be further suppressed.

  In this embodiment, the diffusion cover 12 is made of a transparent light-transmitting synthetic resin such as acrylic resin or epoxy resin, and mixed with white diffusion beads 12a made of glass. However, the diffusion cover is made of glass. The diffusion beads may be made of a white synthetic resin. Further, both the diffusion cover and the diffusion beads may be made of the same material of glass or synthetic resin. Further, the diffusion beads may be composed of fine metal pieces such as aluminum or metal powder.

  Further, as shown in FIG. 6B, in place of the diffusion beads, a diffusing surface 12a ′ having irregularities may be formed on the inner surface or the outer surface. In this case, by adjusting the roughness of the diffusing surface 12a ′ due to the unevenness, the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11 is formed with unevenness finely, and the other portion B is You may make it form an unevenness | corrugation roughly. Further, in place of the uneven diffusion surface 12a ', the diffusion surface is formed by frost treatment, the density of the frost is adjusted, and the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11 is frosted. May be formed deeply, and the frost may be formed thinly in the other part B around the periphery. In this embodiment, the diffusion cover 12 may be formed in a dome shape as shown in FIG. 6B instead of a substantially U-shaped cross section.

  In this embodiment, the light diffusing means is constituted by the diffusing cover 12, but a transparent or semi-transparent paint mixed with diffusing beads is applied to the light source body 11c composed of the light emitting element 11 and the substrate 11b so as to cover the whole. Also good. That is, as shown in FIGS. 7 (a) and 7 (b), first, a paint in which beads 12a1 having a small particle size are mixed in a high density is applied only to a portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a. Thus, the light diffusion portion 12A is formed. Next, a coating material in which beads 12a2 having a slightly larger particle diameter are mixed so as to have a low density is applied, including the other part B around it and the electrical connection part 70 provided at the end of the substrate 11b.

  According to this, light can be diffused by the light diffusing portion 12A to reduce glare, and the paint has water repellency and functions as a sealing material. 11b, the electrical connection portion 70 can be well insulated, and the portion including the electrical connection portion can be waterproofed, which is suitable for outdoor lighting equipment such as crime prevention light and street light exposed to wind and rain. A light emitter can be constructed.

  In this example, after a transparent coating material that does not contain diffusion beads is applied and solidified on the entire surface, frost treatment or uneven formation is formed on the outer surface of the portion A facing the region directly above and above the light emitting portion 11a of the light emitting element 11. The light diffusion portion may be formed by performing a light diffusion process. Furthermore, a part A that is molded with a transparent or translucent synthetic resin instead of a paint so as to cover the entire light source body 11c, and that faces the region including the periphery immediately above and immediately above the light emitting part 11a of the light emitting element 11 after molding. The light diffusing portion may be formed by performing a light diffusing process on the outer surface of the film by a frost process or an uneven surface formation.

  Moreover, as shown in FIG.7 (c), the light emitting element 11 and the board | substrate 11b which comprise the light source body 11c are covered so that the whole including the electrical connection part (not shown) provided in the edge part may be covered. A heat-shrinkable tube as a sealing material made of a synthetic resin is covered, and heat is applied to shrink it so that it becomes airtight. Further, a light diffusing process 12a3 is applied to the outer surface of the portion A facing the region including the area immediately above and immediately above the light emitting part 11a of the light emitting element 11 to form a diffusion tube 12B by forming a light diffusing process 12a3 by forming irregularities.

  According to this, light can be diffused by the light diffusion treatment 12a3 applied to the diffusion tube 12B to reduce glare, and the heat-shrinkable tube as the sealing material is contracted so as to be airtight. Good electrical insulation can be achieved, and a waterproof effect can be imparted to the portion including the electrical connection portion.

  Further, although the diffusion cover 12 constituting the light diffusing means is configured to have a length dimension that can cover the entire four light emitting elements 11 provided, it may be configured so that one light emitting element is provided individually. That is, as shown in FIG. 8, the inner surface of the bell-shaped (vertically long semi-elliptical spherical shape) translucent member made of translucent synthetic resin such as acrylic resin or epoxy resin, or glass, that is, the light emitting element 11. A diffusion cap 12C is formed by forming a diffusing surface 12a4 with irregularities only in a portion A facing the region including the area immediately above and immediately above the light emitting portion 11a. According to this, it is possible to reduce the glare by diffusing the light by the uneven surface 12a4 formed by the unevenness formed in the central portion of the inner surface of the diffusion cap 12C, and a transparent portion is formed around the diffusion surface 12a4. Lightness is sufficiently maintained, and a prism function can be provided. For this reason, the light b radiated from the light emitting portion 11a of the light emitting element 11 toward the surroundings is not diffused, the light loss is suppressed, the radiation direction is controlled by the prism action, and a desired arrangement is achieved by the reflector 13. Controlled by light.

  Furthermore, as shown in FIG. 9, the inner surface central portion of a light transmitting synthetic resin such as acrylic resin or epoxy resin or a hollow pyramid shaped light transmitting member made of glass, that is, the light emitting portion 11 a of the light emitting element 11. A diffusion cap 12D is formed in which a diffusing surface 12a4 is formed only on the portion A facing the region including the immediately above and immediately above periphery, and the periphery is a thin portion 12a5. According to this, it is possible to reduce the glare by diffusing light by the uneven surface 12a4 formed by the unevenness formed in the central portion of the inner surface of the diffusion cap 12D, and a thin transparent portion is formed around the diffusion surface 12a4. Therefore, the translucency is sufficiently maintained and light loss is suppressed. In the example shown in FIGS. 8 and 9, the diffusion surface 12a4 may be formed by making the frost darker instead of forming the unevenness, or may be formed by mixing a large amount of diffusion beads.

  Furthermore, as shown in FIG. 10, a diffusion cap 12E is formed by kneading a diffusing material into translucent synthetic resin or glass such as acrylic resin or epoxy resin, and the thickness of the central portion of the diffusion cap is increased. The thick portion 12a6 is formed so that the periphery is a thin portion 12a5. According to this, the diffusion effect of the portion A facing the region including the periphery immediately above and immediately above the light emitting portion 11a of the light emitting element 11 is enhanced, and the high luminous flux component of the LED of the light emitting portion can be efficiently diffused and dazzled. The thickness can be reduced. In this example, the diffusion cap formed by kneading the diffusion material is not limited to the cap shape, and may be formed in a cover shape to constitute the diffusion cover 12 as shown in FIGS. In the examples shown in FIGS. 8 to 10, the diffusion caps are individually provided one by one. However, for example, the diffusion caps may be provided so as to cover the two light emitting elements.

  In this embodiment, the reflector 13 is controlled by reflecting the light b not emitted and diffused from the light emitting element and the diffused lights c and d. For example, a thin white diffusion cover is used. Light that is slightly diffused by other diffusing means such as that produced in may also be controlled. Moreover, you may comprise a shape in a mortar shape so that the circumference | surroundings of the light-emitting body 10 may be enclosed as shown in FIGS.

  6 to 10 showing the modified examples, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

1 is a front cross-sectional view showing a light emitter in an embodiment of the present invention. Similarly, a light emitter is shown, (a) is a front sectional view, (b) is a side sectional view, and (c) is a top view. The perspective view of the front view which shows the lighting fixture in the Example of this invention in the state which removed the light control body. The side view which cuts out a part of lighting fixture similarly. Similarly, it shows a state in which the luminaire is installed on the road, (a) is a side view showing the support member of the luminaire, (b) is a view of the installed state as seen from the direction of the road, and (c) is in the lighting state. The figure which shows a light distribution state schematically. The modification of a light-emitting body is similarly shown, (a) is front sectional drawing which shows a 1st modification, (b) is front sectional drawing which shows a 2nd modification. The modification of a light-emitting body is similarly shown, (a) is front sectional drawing which shows a 3rd modification, (b) is sectional drawing of a side, (c) is sectional drawing of the front which shows a 4th modification. Similarly, the 5th modification of a light-emitting body is shown, (a) is front sectional drawing, (b) is sectional drawing of a side surface, (c) Top view. The 6th modification of a light-emitting body is similarly shown, (a) is front sectional drawing, (b) is sectional drawing of a side surface, (c) Top view. The 7th modification of a light-emitting body is similarly shown, (a) is front sectional drawing, (b) is side sectional drawing, (c) Top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light-emitting body 11 Light-emitting element 12 Light-diffusion means 13 Reflector 20 Lighting fixture 21 Light control body 22 Appliance main body

Claims (3)

A light emitting device made of a semiconductor;
Light diffusing means provided in a region including directly above the light emitting portion of the light emitting element;
A reflector that is provided around the light emitting element and mainly reflects light that does not pass through the light diffusing means;
A light emitter characterized by comprising: The light diffusing means is provided so as to cover the light emitting element with a translucent member, and at least a part facing the light emitting part of the light emitting element is configured to have a larger light diffusing action than other parts. The light emitter according to claim 1. A light emitter according to claim 1 or 2;
A light control body provided to cover the light emitter;
An instrument body that supports the light emitter and the light control body;
The lighting fixture characterized by comprising.

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