JP5591971B1 - LED lighting device - Google Patents

Abstract

An LED illumination device capable of attenuating unevenness in color and illuminance unevenness of a surface to be irradiated by the LED illumination device.
An LED illumination device includes an LED unit member serving as a light source, a power supply device for lighting the LED unit member, and a main body to which the LED unit member and the power supply device are attached. A light diffusion surface is formed on at least the peripheral edge 4i of the reflective opening 4d that distributes the LED irradiation light of the LED unit member 42. The light diffusing surface can be formed on the entire surface of the LED unit member excluding the reflective opening 4d. The peripheral edge of the opening of the reflective opening 4d may be polygonal.
[Selection] Figure 8

Description

  The present invention relates to an LED lighting device, and more particularly to an LED lighting device used outdoors such as a parking lot.

  2. Description of the Related Art In recent years, with increasing environmental awareness, LED lighting devices using LED elements with excellent power savings as light sources have been actively used. In particular, recently, there has been a demand for an LED lighting device that can be used as an alternative to a high-intensity discharge lamp (HID lamp) such as a mercury lamp used in parking lot lights, road lights, high ceiling lights, and the like.

  For example, Patent Document 1 discloses a light distribution control of an LED substrate on which an LED is mounted, a lighting device that drives the LED, and light emitted from the LED in a space formed by a housing and an outer lens that covers one end of the housing. An LED illuminating lamp containing a reflector to be disclosed is disclosed.

  According to this LED illuminating lamp, the LED irradiation light is distributed by the reflector, and is transmitted through the outer lens to a distance. There is a case where a phenomenon occurs in which the light is split and colored at the part. For example, in an LED luminous body that emits white light by combining a blue LED and a yellow phosphor, a phenomenon that a yellow light component having a long wavelength develops color at the periphery of the reflector may occur, and the appearance is not good. In addition to being amplified by the outer lens, it also causes uneven color and uneven illumination on the irradiated surface.

JP 2012-248342 A

  This invention is made | formed in view of the said problem, and provides the LED illumination apparatus which can attenuate the color irregularity of the surface to be irradiated by an LED illumination apparatus, and illumination intensity irregularity.

In order to solve the above-mentioned problem, in the invention according to claim 1 , a main body serving as a top cover to which an LED unit composed of a plurality of LED unit members serving as a light source and a power supply device for lighting the LED unit are attached. And
A translucent protective cover that is fixed to the lower part of the main body and covers the LED unit and the power supply device;
The LED unit member is
An LED substrate on which a plurality of LED elements are mounted;
A substrate support that supports the LED substrate and is fixed to the body;
A plurality of concavely curved parabolic curves that are disposed on the front side of the LED substrate, the front portion in the LED irradiation direction is substantially planar, and the LED elements are exposed corresponding to the LED elements of the LED substrate. A reflective member formed with a reflective opening,
A light diffusing surface is formed on the substantially planar front surface portion including the peripheral edge portion of the reflective opening of the reflective member .

Moreover, in the invention which concerns on Claim 2 , the main body used as the upper surface cover to which the LED unit comprised from the several LED unit member used as a light source, and the power supply device which makes it light is attached ,
A translucent protective cover that is fixed to the lower part of the main body and covers the LED unit and the power supply device;
The LED unit member is
An LED substrate on which a plurality of LED elements are mounted;
A substrate support that supports the LED substrate and is fixed to the body;
A plurality of concavely curved parabolic curves that are disposed on the front side of the LED substrate, the front portion in the LED irradiation direction is substantially planar, and the LED elements are exposed corresponding to the LED elements of the LED substrate. A reflective member formed with a reflective opening,
The reflection member has a polygonal peripheral edge, and a light diffusing surface is formed on the substantially planar front surface including the peripheral edge of the reflection opening .

According to the LED illumination device of the invention according to claim 1 and claim 2, even if a part of the light component of the LED irradiation light distributed from the reflection opening is colored at the peripheral edge of the reflection opening, the color development Is diffused or dispersed, so that effects such as illuminance unevenness and color unevenness on the irradiated surface can be attenuated.

It is a whole external appearance perspective view of the LED lighting apparatus which shows embodiment of this invention. It is an assembly exploded perspective view of a LED lighting device. It is an assembly exploded perspective view of the LED unit member of a LED lighting device similarly. It is a perspective view of the LED unit member of LED lighting device similarly. It is a front view of the LED unit member shown in FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is a perspective view of the state where the light diffusion surface was similarly formed in the LED unit member. It is the perspective view of the state which made the reflective opening part of the LED unit member the polygonal shape similarly. It is sectional drawing of a LED illuminating device similarly. It is a perspective view of the state which formed the light-diffusion surface in the protective cover (cover member) of a LED lighting apparatus similarly.

  Hereinafter, the embodiment at the time of applying the LED lighting device concerning the present invention to a parking lot light is described. FIG. 1 is an overall perspective view of an LED lighting device (parking lot light) according to the present invention, and FIG. 2 is an exploded view thereof.

  As shown in FIGS. 1 and 2, an LED lighting device 100 according to the present invention includes a main body 1 serving as a top cover, a protective cover 2 fixed to the lower portion of the main body 1, a main body 1 and a protective cover 2 (cover member). ) And an inner cover 3 for covering a lower end portion (not shown) of the LED unit 4. A power supply device 5 and a lighting control device 6 are provided inside the main body 1. The protective cover 2 is fixed to the main body 1 by screws or the like, and covers the LED unit 4 and the inner cover 3 fixed inside the main body 1 including the power supply device 5 and the lighting control device 6. In addition, the main body 1 is shape | molded by the approximate semi-disc shape using the metal and the synthetic resin.

  The LED unit 4 includes a plurality of LED unit members 41 to 45 disposed along the inner peripheral surface of the side surface portion of the main body 1, and another LED unit member 46 is provided at a substantially central portion inside the main body 1. (For convenience, the LED unit members 41 to 45 are LED units 4 here, but the LED unit member 46 is not excluded from the LED units 4). The LED unit member 41 is disposed at the front position of the main body 1, and the reference numerals are omitted. However, the LED unit member 41 has the same combination as the LED unit members 41 to 45 with the LED unit member 41 as a central plane. They are arranged symmetrically in the circumferential direction (also arranged in the back direction in FIG. 2).

  The basic component configuration of the LED unit members 41 to 46 will be described by taking the LED unit member 43 as an example. As shown in FIG. 3, the LED unit member 43 corresponds to the LED substrate 4b on which the plurality of LED elements 4a are mounted, the substrate support 4c that supports the LED substrate 4b, and the LED elements 4a of the LED substrate 4b. The reflecting member 4e is formed with a plurality of reflecting openings 4d. This reflection opening 4d distributes the irradiation light of the LED element 4a, and has a concave curved surface that exposes the light emitting part of the LED element 4a mounted on the LED substrate 4b. The reflection member 4e is disposed so as to cover the LED substrate 4a, and is closely fixed to the substrate support 4c together with the LED substrate 4a by screwing or the like and integrated. The front surface portion of the reflecting member 4e, that is, the surface in the LED irradiation direction is substantially flat as shown in FIGS. The LED substrate 4b is provided with a wiring connector 4f.

  The reflective member 4e can be integrally molded with a synthetic resin containing a highly reflective additive or integrally molded with a synthetic resin having good heat resistance, and then subjected to a plating process such as aluminum vapor deposition to increase the reflectance. (It is a reflective surface). The substrate support 4c is made of aluminum or the like having a high thermal conductivity, and the lower end portion of the flat plate surface is bent into a substantially “<” shape to form a fixing portion 4g with the main body 1.

  The other LED unit members 41, 42, and 44 to 46 have the same components except for the arrangement of the LED elements 4a of the LED substrate 4b and the arrangement of the reflection openings 4d of the reflection members 4e corresponding thereto.

  In these LED unit members 41 to 46, all or a part of the reflection opening 4d of the reflection member 4e described above is relative to the main optical axis of the LED element 4a (a straight line along an angle indicating the maximum luminous intensity in the light distribution curve). It is a concave curved reflecting surface with a parabolic curve tilted. That is, the reflection opening 4d has a wide-open curved shape in which a small-diameter opening is formed at the lower end and a large-diameter opening is formed at the upper end, and the light-emitting portion of the LED element 4a extends from the small-diameter opening. It is arranged to be exposed.

  When the reflective opening 4d is formed to be inclined with respect to the main optical axis of the LED element 4a, if the inclination angle is 0 to 20 degrees, the irradiation angle is changed while the light distribution angle of the LED element 4a is substantially constant. Therefore, it is possible to form the reflective opening 4d whose irradiation angle is adjusted within this angle range. The tilt direction of the reflection opening 4d is arbitrary, and is adjusted so that the irradiated surface has a predetermined illuminance or more by tilting in the left-right direction or the up-down direction. The LED unit member 41 will be described as a representative example.

  As shown in FIGS. 4 and 5, the reflective member 4e of the LED unit member 41 is formed with three reflective openings 41a to 41c and 41d to 41f in the upper row and the central row, and two in the lower row. Reflective openings 41g to 41h are formed. As shown in FIGS. 5 to 7, LED elements 41 </ b> A to 41 </ b> H are arranged on the LED substrate 4 b at positions corresponding to the reflection openings 41 a to 41 h. The LED elements 41A to 41H are arranged such that the main optical axis X is perpendicular to the upper surface of the LED substrate 4b.

  As shown in FIG. 6, the reflection openings 41g and 41h in the lower row have a parabolic curve curved surface in which one reflection opening 41g is inclined to the left by a predetermined angle with respect to the main optical axis X of the LED element 41G. The other reflection opening 41h is a parabolic concave curved surface inclined at a predetermined angle to the right with respect to the main optical axis X of the LED element 41H.

  Further, as shown in FIG. 7, the upper row of reflective openings 41a to 41c has a parabolic concave curve in which the left reflective opening 41a is inclined to the left by a predetermined angle with respect to the main optical axis X of the LED element 41A. The right reflective opening 41c and the central reflective opening 41b are parabolic curved curved surfaces that are inclined to the right by a predetermined angle with respect to the main optical axis X of the LED elements 41B and 41C. It has become. In addition, as shown in FIG. 5, the three reflective openings 41d to 41f in the central row also have a parabolic curved concave surface inclined by a predetermined angle in the left-right direction with respect to the main optical axis X of the LED elements 41D to 41F. It has become.

  Although the LED unit member 41 has been described above as an example, the reflective opening portions 4d of the other LED unit members 42 to 46 are also formed to be inclined in a predetermined direction. However, the LED unit member 46 disposed in the central portion of the main body 1 mainly irradiates the bottom surface direction of the LED lighting device 100, and when the irradiation unevenness is small, the reflective opening 4d is the main optical axis of the LED element 4a. The concave curved surface of the parabola that coincides with (the inclination angle of the reflection opening 4d with respect to the main optical axis is 0 degree).

  For example, when the odd-numbered rows of reflective openings are formed as in the LED unit member 43, the tilts of the left and right rows of reflective openings may be symmetric with respect to the central row. Specifically, the concave curved surface of the parabolic curve that coincides with the main optical axis of the LED element 4a without tilting the three reflection openings 4d in the central column (the inclination angle of the reflection opening 4d with respect to the main optical axis is 0 degree). ), And one of the three reflective openings 4d in the left and right columns can be inclined to the left by a predetermined angle with respect to the main optical axis, and the other can be inclined to the right. If it does in this way, a wide area can be uniformly irradiated with one LED unit member.

  The inclination angles of the respective reflective openings 4d of the LED unit members 41 to 46 are selected so that the illumination area in which the LED irradiation device 100 is installed has an illuminance equal to or higher than the reference. Incidentally, the parking lot light is mounted on the LED board 4b corresponding to the number and arrangement of the reflective opening portions 4d of the LED unit members 41 to 46 so as to satisfy the illuminance standard of the road 10 lux or more and the parking area 2 lux or more. The number and arrangement of the LED elements 4a are selected, and the inclination angle of each reflective opening 4d is selected.

  The form of the LED unit members 41 to 46 is not limited to that shown in the figure, and in order to increase or decrease the amount of light, the number and arrangement of the LED elements 4a mounted on the LED substrate 4b, and the corresponding reflective openings 4d. The number and sequence can be selected. That is, since the number of the LED elements 4a of each LED unit member is only increased / decreased without increasing / decreasing the number of LED unit members 41-46, the design of the LED lighting device 100 corresponding to the installation location becomes easy. .

  A light diffusion surface is formed on the front surface of the reflection member 4e of the LED unit members 41 to 46 described above. As a representative example, the LED unit member 42 shown in FIG. 8 has a light diffusion surface 4h formed on the front surface thereof. In order to obtain a light diffusing surface, a resin surface at a predetermined position of the protective cover 2 is sandblasted to form fine irregularities (textures), and fine irregularities are formed at predetermined positions on the mold surface of the protective cover 2 Thus, an arbitrary method such as a method of molding the protective cover 2 or a method of adding a light diffusing agent to the translucent resin can be selected. The light diffusing surface 4h only needs to be formed with a predetermined width at least at the opening peripheral edge 4i of the reflecting member 4e. In FIG. 8, the light diffusion surface 4h on the front surface of the reflecting member 4e is indicated by light ink, and the light diffusion surface of the opening peripheral edge 4i is indicated by lighter ink.

  Thus, by forming the light diffusion surface 4h on the front surface portion of the LED unit members 41 to 46, when the irradiation light of the LED element 4a is reflected by the reflection opening 4d and emitted at a predetermined angle, a part of the light diffusion surface 4h is formed. Even if the light component is spectrally separated and colored at its peripheral edge, the colored color is diffused by the light diffusion surface 4h.

  FIG. 9 shows another embodiment of the reflective opening 4d of the LED unit members 41-46. The reflective opening 4d shown in the figure has a polygonal opening. In this case, a polygonal shape close to a circle is preferable. By making the reflective opening 4d into a polygonal shape in this way, when the irradiation light of the LED element 4a is reflected by the reflective opening 4d and emitted at a predetermined angle, the light component is dispersed at the corner, and the reflective opening The color development of some light components at the peripheral edge of 4d is attenuated. When the light diffusing surface 4h is formed at least at the peripheral edge of the polygonal reflective opening 4d, the color attenuation effect is further improved.

  In addition, although the said light-diffusion surface 4h is not shown in the unit members 41-46 shown in FIGS. 1-5, it cannot be overemphasized that the light reflection surface 4h similar to FIG. 8 is formed.

  As shown in FIG. 2, such LED unit members 41 to 45 are fixed to a fixing portion 1 a having a vertical and horizontal rib shape formed in the circumferential direction of the inner surface of the main body 1 by screwing or the like. The LED unit member 46 is fixed to a fixing portion 1b having a vertical and horizontal rib shape formed at a substantially central portion of the inner surface of the main body 1 by screws or the like. The central LED unit member 46 is installed at a predetermined angle toward the lower surface. Although not shown, each of these LED unit members 41 to 46 is electrically connected to the power supply device 5 via a wiring connector 4f by wiring.

  The inner cover 3 has a substantially semi-disc shape corresponding to the shape of the main body 1 and is integrally formed using a synthetic resin. As shown in FIG. 2, the inner cover 3 has a folded portion 3c formed at the lower edge of the peripheral surface portion 3b rising from the bottom surface portion 3a. The bottom surface portion 3a is formed with a plurality of convex fixing portions 3d for fixing inside the main body 1, and the inner cover 3 has a plurality of fixing portions provided inside the main body 1 corresponding to the fixing portions 3d. It is fixed to the boss 1c by screwing or the like.

  An inclined portion 3e facing the LED unit 46 is formed at a substantially central portion of the inner cover 3, and an opening 3f is opened in the inclined portion 3e. The LED unit 46 is irradiated through the opening 3f, and the lower surface in the direction opposite to the attached member 7 such as a column shown in FIG. 1 is irradiated.

  The inner cover 3 covers the power supply device 5 and the lighting control device 6 fixed from the inside of the main body 1 from below, and also includes a wiring connector 4f provided at the lower part of each LED unit member 41 to 46 by a folded portion 3c, Covers the connected wiring. As shown in FIG. 1, the inner cover 3 only covers the lower end of the LED unit 4, and therefore does not hinder the LED irradiation from the LED unit 4.

  The protective cover 2 covers the entire inner cover 3, LED unit 4, power supply device 5, lighting control device 6, and protects these storage components together with the main body 1 serving as a top cover from the external environment such as wind and rain and dust. Yes. As shown in FIG. 2, the protective cover 2 has a substantially semi-cylindrical box shape corresponding to the shape of the main body 1, an upper opening 2 a corresponding to the bottom shape of the main body 1, and the inner cover 3. The side part 2b and the bottom part 2c are deep enough to accommodate interior parts such as the LED unit 4, the power supply device 5, and the lighting control device. This protective cover 2 is made of a translucent resin by integral molding.

  Further, as shown in FIG. 10, the side surface portion 2 b-1 (front surface portion of the protective cover 2) facing the LED unit 4 of the protective cover 2 is on the LED unit 4 side so that the distance from the LED unit 4 is small. It has an inclined shape. Thereby, since the incident angle to the side part 2b-1 of LED irradiation light is right angle or close to right angle, LED irradiation light efficiently reaches a target irradiation surface. Furthermore, since the side surface 2b-1 is an inclined surface, it is possible to expect an effect of removing adhering substances such as water droplets and dust, which are factors that impede translucency.

  A light diffusion surface (light scattering surface) is formed on the entire surface or a part of the protective cover 2. The method for forming the light diffusion surface is the same as the light diffusion surface formed on the LED unit members 41 to 46 described above.

  The protective cover 2 shown in FIG. 11 has a light diffusing surface 20 (indicated by light ink in the drawing) on the entire surface of the side surface portion 2b and the bottom surface portion 2c of the protective cover 2 except for the translucent portion 2d of the LED irradiation light from the LED unit 4. ) Is formed. The translucent part 2d is formed at a position corresponding to the arrangement of the reflective openings 4d of the LED unit members 41 to 45 described above, and the translucent resin material as a material is exposed without being subjected to the light diffusion process. Yes. The translucent part 2d is formed in a circular shape corresponding to the light-emitting side opening shape of the reflective opening 4d. Moreover, in order to improve the translucency of the translucent part 2d, the corresponding | compatible part of the translucent part 2d of a metal mold | die can be polished, and the translucent part 2d can also be mirror-finished. From the translucent part 2d, the LED irradiation light of the LED unit 4 is transmitted and irradiates a far irradiated surface at a predetermined irradiation angle.

  The shape of the light transmitting portion 2d is not particularly limited in the present invention, but is similar to the opening portion of the reflective opening 4d, and the region of the light transmitting portion 2d is more than the opening region of the reflective opening portion 4d. It is also preferable to make it smaller. Specifically, it is preferable that the diameter of the translucent part 2d is a circle having a slightly smaller diameter than the opening diameter of the peripheral part of the reflective opening 4d. As a result, the peripheral edge of the reflective opening 4d is covered with the light diffusing surface 20, and a part of the light component is emitted when the irradiation light of the LED element 4a is reflected by the reflective opening 4d and emitted at a predetermined angle. Even if the light is dispersed and colored near the periphery, the color is diffused and attenuated by the light reflecting surface 20 formed on the protective cover 2.

  For the purpose of color attenuation near the periphery of the reflective opening 4d, it is not necessary to form the light diffusing surface 20 on the entire surface of the protective cover 2, and at least a region that covers the peripheral edge of the reflective opening 4d. The light temporary diffusing surface 20 may be formed on the substrate. Further, this is sufficient as long as only the light diffusing surface 20 of the protective cover 20 can achieve the color attenuation effect. However, at least the peripheral edge of the reflective opening 4d of the LED unit members 41 to 46 as described above is used. A method of forming a diffusing surface and a method of making the reflective opening 4d into a polygonal shape can also be combined.

  Further, by making the entire surface of the protective cover 2 excluding the translucent portion 2d into the light diffusion surface 20, a part of the LED irradiation light from each LED element 4a of the LED unit 4 enters the protective cover 2, and the light The components are diffused over the entire surface of the protective cover 2 by the light diffusion surface 20. For this reason, the irradiation unevenness of the irradiation surface especially in the vicinity of the installation place of the LED irradiation apparatus 100 is eliminated, and the irradiation is performed uniformly. Moreover, since the projection light to the protective cover 2 is diffused, a glare reduction effect can also be obtained.

  In addition, a part of the irradiation light from each LED element 4a arranged in the lower stage of the LED unit 4 also enters the protective cover bottom surface portion 2c and diffuses to the bottom surface portion 2c. When the irradiated surface in the bottom direction of the LED lighting device 100 is uniformly irradiated with an illuminance greater than or equal to the reference, the LED unit member 46 can be omitted. In this case, in order to increase the illuminance of the irradiated surface in the bottom direction, all or a part of each of the reflective openings 4d arranged in the lower stage of the LED unit 4 is set downward at a predetermined angle with respect to the main optical axis of the LED element 4a. The amount of light incident on the bottom surface portion 2c on which the light diffusion surface is formed may be increased.

  The position where the light diffusing surface 20 of the protective cover 2 is formed is not limited to the above-described form, but is formed at a necessary position according to the arrangement of the LED units 4, the arrangement of the reflective openings 4d, the shape of the protective cover 2, and the like. be able to.

  Note that an automatic flashing unit 8 is provided on the back surface of the main body 1 (attached member 7 side) as shown in FIG. 2, and a power supply device is provided according to a sensor output signal provided in the automatic flashing unit 8. The lighting control device 6 connected to 5 cuts off the supplied power and controls the supply, and the LED unit 4 is turned off and turned on.

  As shown in FIG. 1, such an LED lighting device 100 is attached to a member 7 to be attached such as a utility pole or a pole by a mounting arm 8. At this time, the height of the mounting position of the LED lighting device 100 is adjusted so that the illumination area has a predetermined illuminance.

  Since the LED unit members 41 to 46 of the present invention can be manufactured by integrally molding the reflecting member 4e, each of the LED unit members 41 to 46 can be mass-produced at low cost, and as described above, the LED unit. Since the members 42 to 45 are simply fixed to the main body 1 symmetrically about the LED unit member 41, the assemblability is also improved.

  Even if the LED unit members 41 to 46 are tilted with respect to the main optical axis of the LED element 4a, the entire LED unit member may be tilted as necessary, such as when the illuminance of a predetermined area is insufficient. Good. In the above-described embodiment, this can be realized by inclining the substrate support 4c.

  Embodiment mentioned above shows an example of this invention, The whole shape of LED lighting apparatus and a structure of detail can be changed arbitrarily according to a use purpose, an installation place, etc. The LED lighting device of the present invention can be used as an outdoor lamp such as a street lamp and an indoor lamp such as a high ceiling lamp.

DESCRIPTION OF SYMBOLS 1 Main body 2 Protective cover 2b Protective cover side surface part 2c Protective cover bottom face part 2d Translucent part 4d Reflective member 4d Reflective opening part 4h Light diffusing surface 4i Reflecting opening peripheral part 20 Light diffusing surface 41-46 LED unit member

Claims (2)

A main body serving as a top cover to which an LED unit composed of a plurality of LED unit members serving as a light source and a power supply device for lighting the LED unit are attached ;
A translucent protective cover that is fixed to the lower part of the main body and covers the LED unit and the power supply device;
The LED unit member is
An LED substrate on which a plurality of LED elements are mounted;
A substrate support that supports the LED substrate and is fixed to the body;
A plurality of concavely curved parabolic curves that are disposed on the front side of the LED substrate, the front portion in the LED irradiation direction is substantially planar, and the LED elements are exposed corresponding to the LED elements of the LED substrate. A reflective member formed with a reflective opening,
An LED illumination device, wherein a light diffusion surface is formed on the substantially planar front surface portion including a peripheral edge portion of the reflection opening of the reflection member . A main body serving as a top cover to which an LED unit composed of a plurality of LED unit members serving as a light source and a power supply device for lighting the LED unit are attached ;
A translucent protective cover that is fixed to the lower part of the main body and covers the LED unit and the power supply device;
The LED unit member is
An LED substrate on which a plurality of LED elements are mounted;
A substrate support that supports the LED substrate and is fixed to the body;
A plurality of concavely curved parabolic curves that are disposed on the front side of the LED substrate, the front portion in the LED irradiation direction is substantially planar, and the LED elements are exposed corresponding to the LED elements of the LED substrate. A reflective member formed with a reflective opening,
The LED illumination device according to claim 1, wherein a peripheral portion of the reflective opening of the reflective member has a polygonal shape, and a light diffusion surface is formed on the substantially planar front surface including the peripheral portion of the reflective opening .