JP2008243498A - Led lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting device having a cylindrical or circular shape compatible with the specification of a fluorescent lamp lighting system, and capable of securing sufficient illuminance and product life by having sufficient heat radiation efficiency. <P>SOLUTION: In the LED lighting device, the shape of a peripheral edge is a cylindrical shape compatible with a fluorescent lamp lighting device, and a plurality of LEDs are arranged as light emitting sources. The peripheral edge is divided into a first outer surface and a second outer surface, and a heat radiation part constituting the first outer surface has a mounting surface having the LEDs mounted in its inside. A light-permeable part constituting the second outer surface covers the mounting surface for mounting the LEDs thereon. Thereby, since the shape of the peripheral edge of the LED lighting device constitutes the heat radiation part in addition to having a shape compatible with the fluorescent lamp lighting device, sufficient heat radiation performance is secured. Thereby, temperature rise of the LED lighting device can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an illuminating device using a light emitting diode (hereinafter referred to as LED), and is particularly compatible with a fluorescent lamp illuminating device using a fluorescent tube in which a fluorescent material is applied to the inner surface of a glass tube. The present invention relates to an LED lighting device having a certain shape.

  The fluorescent lamp type LED lighting device disclosed in Patent Document 1 includes a transparent or translucent pipe, a support plate provided inside the pipe, and a plurality of LEDs provided on the bottom surface of the support plate. It is configured.

  In addition, the LED lighting device disclosed in Patent Document 2 is a cylindrical glass tube having translucency, a printed circuit board disposed in the glass tube, and a holding means for holding the printed circuit board in the glass tube. A pair of holders and a pair of base caps attached to both ends of the glass tube are provided. The glass tube is formed in a straight tube shape having substantially the same shape and dimensions as a glass tube constituting an existing fluorescent lamp. The length of the printed circuit board is substantially the same as the length of the glass tube, and a plurality of LEDs are arranged on both upper and lower surfaces.

JP 2001-351402 A JP 2004-192833 A

  However, in the above background art, the substrate on which the LED is mounted is configured to be housed inside a pipe or a glass tube, and the heat conduction path to the outside world must be limited.

  The heat conduction path from the inside of the tube to the outside mainly consists of a route through the glass tube through a gas such as air or other gas sealed in the tube, and a route through the wiring material or electrode for energizing the LED. This is because the thermal resistance is not sufficiently low through any path.

  That is, since the gas and the glass tube generally have a low thermal conductivity, the amount of heat released to the outside through the side surface of the glass tube is limited. On the other hand, although metal members such as wiring materials and electrodes have excellent thermal conductivity, the diameter provided for thermal conduction is limited, and the amount of heat released to the outside through this path is also limited. Become. Either path has a large thermal resistance. When the inside of the glass tube generates heat, it is not possible to efficiently dissipate heat, which may increase the internal temperature.

  Here, the LED is one of the semiconductor devices and has temperature characteristics peculiar to the semiconductor device. That is, the light emission efficiency and the device life are temperature dependent. The higher the usage environment, the lower the light emission efficiency, making it impossible to obtain sufficient illuminance, and the device life is shortened.

  The LED lighting device uses less power than the fluorescent lamp even when the illuminance of the lighting device itself is increased by using a large power LED or mounting a large number of LEDs. However, in the configuration of the background art that cannot sufficiently dissipate heat due to the temperature characteristics of the LED, heat radiation is insufficient due to the illuminance and the temperature of the use environment. There is a possibility that sufficient illuminance and product life may not be obtained due to the temperature characteristics of the LED, which is a problem.

  The present invention has been made in view of the background art described above, and has a cylindrical or annular shape that is compatible with the standard of a fluorescent lamp illuminating device, and has sufficient heat dissipation efficiency, so that sufficient illuminance and product life can be obtained. It aims at providing the ensured LED lighting apparatus.

  In order to achieve the above object, an LED illumination device according to the present invention is an LED illumination device having a cylindrical or annular shape whose outer peripheral shape is compatible with a fluorescent lamp illumination device. The first outer surface of the peripheral edge is configured, the heat dissipating part having the LED mounting surface on the inner side, and the second outer surface of the outer peripheral edge excluding the first outer surface are configured to cover the mounting surface. And a light passage portion.

  In the LED illumination device of the present invention, the shape of the outer peripheral edge is a cylinder or an annular shape compatible with the fluorescent lamp illumination device, and a plurality of LEDs are provided as light emission sources. The outer peripheral edge is divided into a first outer surface and a second outer surface. Among these, the thermal radiation part which comprises a 1st outer surface has a mounting surface in which LED is mounted inward. Moreover, the light passage part which comprises a 2nd outer surface has covered the mounting surface in which LED is mounted.

  Thereby, in the LED lighting device, in addition to the outer peripheral shape having a cylindrical or annular shape compatible with the fluorescent lamp lighting device, the portion constituting the first outer surface which is a part of the outer peripheral edge Since the heat dissipating part is configured, sufficient heat dissipating performance is ensured while having a shape compatible with the fluorescent lamp illumination device. The heat generated by the light emission of the LED can be efficiently radiated through the heat radiating portion, and the temperature rise of the LED lighting device can be suppressed.

  According to the LED lighting device of the present invention having sufficient heat dissipation characteristics for an LED having temperature characteristics that the higher the temperature, the lower the luminous efficiency and the sufficient illuminance cannot be obtained and the life of the device is shortened. The temperature rise accompanying the light emission can be suppressed.

  In order to ensure illuminance, sufficient power dissipation is possible even when a large power LED is used and a large number of LEDs are mounted, and the temperature rise of the LED lighting device can be suppressed. Thereby, compared with a fluorescent lamp illumination device, an LED illumination device having sufficient illuminance can be obtained while sufficiently exhibiting low power consumption and long life characteristics.

  According to the present invention, since it has a cylindrical or annular shape that is compatible with the standard of a fluorescent lamp illumination device and has sufficient heat dissipation efficiency, the mounted LED can emit light with sufficient luminous efficiency and device lifetime. Can do. It is possible to provide an LED lighting device having a shape compatible with a fluorescent lamp lighting device and having a sufficient long illuminance and maintenance-free long life.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an LED lighting device according to the present invention will be described in detail based on FIGS. 1 to 18 with reference to the drawings.

  1 to 6 show the LED illumination device according to the first embodiment. The fluorescent lamp illumination device has a shape compatible with a cylindrical fluorescent tube. If the diameter of the cross-sectional circle that is perpendicular to the cylindrical axis and surrounded by the outer peripheral edge is about 28 mm to 30 mm, a lighting device having a cylindrical shape that is substantially the same standard as the fluorescent tube can be obtained.

  1 and 2 are perspective views, FIG. 3 is a plan view, FIG. 4 is a front view, FIG. 5 is a bottom view, and FIG. 6 is orthogonal to the cylindrical axis of the LED lighting device 1 of the first embodiment. Sectional drawing (AA step view shown in FIG. 3) is shown. Among these, the perspective view of FIG. 2 is a view of the state in which the cover (light transmission portion 12) covering the LED is removed from the perspective view of FIG.

  The cylindrical shape of the LED lighting device 1 has a shape that bisects the circular cross section into two substantially along the cylindrical axis direction. In the outer peripheral edge of the cylindrical shape, the portion corresponding to the first outer surface is the heat radiating portion 11 on the lower half surface, and the upper half surface corresponding to the second outer surface is the light passing portion 12.

  The heat radiating portion 11 includes a convex portion 18 (FIG. 6) that extends linearly in the cylindrical axis direction with the outer peripheral edge as a vertex on the outer peripheral edge side of the cylindrical shape, and between the adjacent convex portions 18 is a cylindrical cylinder. A concave portion 19 (FIG. 6) is provided that falls toward the axis and extends linearly in the cylindrical axis direction. The convex part 18 and the concave part 19 are provided with the shape repeated alternately. It is a so-called fin shape, and has a shape in which the surface area is increased to increase the thermal conductivity.

  Furthermore, the convex-shaped part 18 is provided with the notch part 20 in the direction orthogonal to a cylinder axis for every predetermined distance of a cylinder axis direction. Thereby, while the surface area of the thermal radiation part 11 increases further, the movement path | route of the air which moves the surface of the thermal radiation part 11 can be diversified, and thermal radiation efficiency can be improved.

  Moreover, the thermal radiation part 11 is shape | molded with the metal material excellent in heat conductivity, such as an aluminum alloy and a magnesium alloy. These metal materials are easy to shape and have excellent mass productivity. Sometimes, if the convex portion 18 and the concave portion 19 have a shape extending linearly in the cylindrical axis direction, they can be molded by an extrusion molding technique and can be excellent in mass productivity.

  A portion of the heat dissipating part 11 that does not constitute the outer peripheral edge of the cylindrical shape is provided with an LED 13 and a mounting surface 15 for the circuit board 14 on which the LED 13 is mounted. A plurality of LEDs 13 and circuit boards 14 are mounted on the mounting surface 15 along the cylindrical axis direction. At the time of mounting, it is mounted after improving the adhesion between the LED 13 or the circuit board 14 and the heat dissipating part 11 via a heat conductive adhesive or a heat conductive sheet (not shown). The

  The light passage portion 12 is fixed to the heat dissipation portion 11 by covering the LED 13 and the circuit board 14 placed on the placement surface 15. The light emitted from the LED 13 is brought to the outside through the light passage portion 12. The second outer surface of the upper half where the light passage portion 12 is provided is a light emitting region. In this case, as will be described later in the second embodiment (FIGS. 7 to 10), the light passage unit 12 is preferably provided with a lens function for diffusing light emitted from the LED 13. Thereby, the linear and strong light emitted from LED13 can be made into the soft light which spreads.

  The light passing part 12 is fixed between the heat radiating part 11 by screws 16 at a predetermined interval along the cylindrical axis at a junction point with the heat radiating part 11 in the cylindrical shape divided into two along the cylindrical axis direction. The The light passage portion 12 is provided with a concave portion having a shape recessed from the outer peripheral edge at a position where the screw 16 is screwed, and is defined as a screw placement portion 17. Here, the screw 16 is placed and screwed.

  According to the LED illuminating device 1 of the first embodiment, an LED illuminating device having a cylindrical shape compatible with a fluorescent lamp illuminating device and having low power consumption and excellent luminous efficiency as compared with the fluorescent lamp illuminating device. Can be realized.

  In this case, one region obtained by dividing the cylindrical shape along the cylindrical axis into two half the circular cross section can be the heat radiating portion 11. Sufficient heat dissipation performance is ensured, and an illumination device having excellent heat dissipation characteristics can be obtained. The heat generated by the light emission of the LED can be efficiently radiated through the heat radiating portion 11, and the temperature rise of the LED lighting device can be suppressed.

  An LED lighting device that can be used in an environment where the rise in temperature is suppressed and the illuminance and lifetime are sufficiently secured against the temperature characteristics of the LED, where the higher the temperature, the lower the luminous efficiency and the shorter the device life. Can be provided.

  In order to ensure illuminance, sufficient power dissipation is possible even when a large power LED is used and a large number of LEDs are mounted, and the temperature rise of the LED lighting device can be suppressed. Thereby, compared with a fluorescent lamp illumination device, an LED illumination device having sufficient illuminance can be obtained while sufficiently exhibiting low power consumption and long life characteristics.

  In addition, in the LED lighting device 1, there is no light emission from the heat radiating unit 11, and light emission from the LED can be applied only to the light passage unit 12. Thereby, the light emission from LED can be concentrated. As compared with a conventional fluorescent lamp illumination device, it becomes easy to secure sufficient illuminance with a light source with limited brightness. Since the illuminance can be secured efficiently, the same illuminance with low power consumption can be realized as compared with the same illuminance realized in the conventional fluorescent lamp illumination device. In addition, the range and illuminance of the illumination light can be freely selected, and an effect that cannot be achieved by the conventional fluorescent lamp illumination device can be expected.

  Further, it is conceivable that the heat radiating portion 11 uses a metal material as a material having good thermal conductivity. Among these, it is preferable to use an aluminum alloy or a magnesium alloy that is lightweight and easy to shape. In this case, in the cylindrical LED lighting device 1, if the convex portion 18 and the concave portion 19, which are fin shapes of the heat radiating portion 11, are linearly extended in the direction of the cylindrical axis, the heat radiating portion 11 is extruded. It can be easily molded by a molding technique. It can be formed at low cost and can be mass-produced.

  In addition, in the LED lighting device 1 of the first embodiment, electrodes for supplying power to the LEDs are not shown, but various methods for drawing in the electrodes are conceivable. In addition to inserting a wiring material such as a copper wire, it is conceivable to install electrode poles at both ends. In this case, it is preferable to use an electrode pole having a shape and dimensions compatible with the electrode pole of a conventional fluorescent lamp illumination device. In this case, according to the connection method of several LED with which the LED illuminating device 1 is provided, the voltage value to supply electric power and the different orthogonal flow of electric power feeding can be selected. In particular, if a technique disclosed in Japanese Patent Application Laid-Open No. 2004-6582 or a similar technique is used, commercial AC power can be supplied as it is. If this technology is applied, it is possible to replace the fluorescent tube of the conventional fluorescent lamp illumination device with the LED illumination device 1. Of the fluorescent lamp illuminating apparatus, the illuminating apparatus having no ballast can replace the fluorescent tube with the LED illuminating apparatus 1 as it is.

  In the LED lighting device 1, the screw 16 is illustrated as being screwed from the light passing portion 12 toward the heat radiating portion 11, but the present invention is not limited to this. Needless to say, the direction in which the screw 16 is screwed is also possible in other directions. Moreover, it cannot be overemphasized that fixation with the light passage part 12 and the thermal radiation part 11 is not limited to screwing. Other fixing methods such as a configuration in which the light passing portion 12 and / or the heat radiating portion 11 are slid along a guide and a hook in which the light passing portion 12 and the heat radiating portion 11 are engaged with each other are provided. Needless to say, you can.

  7 to 10 show LED lighting devices 2A and 2B according to the second embodiment. The case of a cylindrical shape similar to that of the LED lighting device 1 (first embodiment) will be described as an example of the shape of the LED lighting device. In the LED lighting device 2A or 2B (second embodiment), a configuration in which the light passage unit 12 has a lens function is illustrated.

  In general, the light output from the LED is linear and has high illuminance. It is inconvenient to use such light as it is as a light source of a lighting device, for example, when the space to be illuminated is a spacious space such as indoors. This is because the irradiated light may not be spread uniformly, and there is a possibility that the light and dark may be locally separated. Moreover, since it is light with high illuminance, there is a possibility that it may cause damage to the eyes when viewing directly with the naked eye, which is not preferable. Therefore, the light passing portion 21 or 22 through which light from the LED passes has a lens function for diffusing light. In this case, lens processing can be easily performed by using a resin material such as acrylic or polycarbonate as the material of the light passage portion 21 or 22. Further, like the light passage portion 12, the light passage portion 21 or 22 also has a shape that bisects a cylindrical cross-sectional shape along the cylindrical axis direction, which contributes to facilitating lens processing. Is.

  In the LED lighting device 21 of the first specific example shown in FIG. 7, a slit 23 having a predetermined interval is formed in the light passage portion 21. The direction of the slit 23 is a direction perpendicular to the arrangement direction X of the LEDs 13. Since the arrangement direction X is substantially the same as the cylindrical axis direction of the illumination device, the slits 23 are provided in a cylindrical concentric circle at predetermined intervals.

  Thereby, the output light emitted by using the LED 13 as a point light source is diffused in the cylindrical axis direction through the slit 23 and can be made into linear illumination having a spread in the cylindrical axis direction. The point-like strong light emitted from the LED 13 is converted into linear illumination, and the light intensity is reduced.

  The step angle of the slit 23 is not particularly specified. It is important that the light output from the LED 13 has an angle that diffuses in the cylindrical axis direction. The direction of the fine surface carved by the slit 23 may be a direction in which the perpendicular of the fine surface and the cylindrical axis form one plane.

  Although not shown, if a slit having another angle intersecting with the slit 23 is further carved, the light from the LED 13 is further diffused, and the illumination has a spread and softness. Can do.

  The LED lighting device 22 of the second specific example shown in FIG. 8 is configured to include minute concave small pieces 24A (FIG. 9) and / or convex small pieces 24B (FIG. 10) at a predetermined interval on one surface of the light passage portion 21. is there. Here, a case where the light incident surface from the LED has a concave shape is referred to as a concave small piece 24A, and a case where the light incident surface has a convex shape is referred to as a convex small piece 24B. The concave small piece 24A and the convex small piece 24B function as a concave lens and a convex lens, respectively.

  As shown in FIG. 9, when the light from the LED is incident on the concave piece 24A functioning as a concave lens, the passing light is diffused in all directions and spreads. Further, as shown in FIG. 10, when the light from the LED is incident on the convex piece 24B that functions as a convex lens, the passing light is condensed and then crossed and spreads in all directions. In any case, the light from the LED becomes light that spreads in all directions without having directivity as it goes outward.

  As a result, the output light emitted from the LED as a point light source obtains illumination that spreads in all directions without having directivity via the concave piece 24A (FIG. 9) and / or the convex piece 24B. be able to. The point-like strong light emitted from the LED is converted into a broad illumination, and the light intensity is reduced.

  The lens portions of the concave small piece 24A and the convex small piece 24B can be formed as a polyhedral shape in addition to being formed with a curved surface.

  FIGS. 11 to 14 show LED illumination devices 3A to 3D of the third embodiment. The present invention relates to a configuration of a mounting surface on which an LED is mounted. The shape of the LED illumination device can be similarly applied to an annular illumination device described later in addition to the cylindrical shape shown in the LED illumination device 1 (first embodiment). The first specific example shown in FIG. 11 to the third specific example shown in FIG. 13 show a part of a cross-sectional view taken along a plane orthogonal to the tangent to the cylindrical axis or the annular axis. The fourth specific example of FIG. 14 shows a perspective view of the heat dissipation part. Any of these examples exemplify a case where a plurality of mounting surfaces having a predetermined crossing angle with each other are provided. It is intended to adjust the spread of light and the irradiation angle. In the following description, it is assumed that the irradiation angle of the LEDs 41 and 42 is 120 °.

  In the LED lighting device 3A of the first specific example shown in FIG. 11, the two mounting surfaces 31 and 32 have an intersection angle of 60 ° parallel to the tangent line of the cylindrical axis or the annular axis and the vertex A as the intersection plane. And intersect. Since the irradiation angle of the LEDs 41 and 42 is 120 °, when the LEDs 41 and 42 are mounted on the mounting surfaces 31 and 32, the irradiation light is irradiated in a range where the elevation angle with respect to the mounting surfaces 31 and 32 is 30 ° or more. Will be. That is, irradiation light having an illumination range of 120 ° left and right around a cylinder or an annular axis is obtained with the front direction of the LED illumination device 3A as one end of the irradiation angle. Thereby, LED illumination device 3A becomes possible [the irradiation range of 240 degrees which is twice 120 degrees].

  In the LED lighting device 3B of the second specific example shown in FIG. 12, a heat radiating section 48 is shown. The two mounting surfaces 33 and 34 are parallel to the tangent line of the cylindrical axis or the annular axis, and intersect with each other with an intersection angle of 120 ° with the vertex A as the intersecting surface. The LEDs 41 and 42 are mounted on the mounting surfaces 33 and 34 after being mounted on the circuit boards 46 and 47. The crossing angle of the mounting surfaces 33 and 34 has a wide angle of 60 ° from the crossing angle of 60 ° in the LED lighting device 3A (first specific example). Thereby, in the front direction of the LED illumination device 3B, the irradiation light emitted from each LED 41, 42 intersects at an angle of 60 °, and the illumination range extends 90 ° left and right around the cylinder or the ring axis. Irradiation light is obtained. The LED illumination device 3B is capable of an irradiation range of 180 °, which is twice 90 °.

  In general, the illumination intensity of the LED is the strongest in the direction perpendicular to the light emitting surface (elevation angle of 90 °), and the illuminance generally decreases as the elevation angle decreases. Also when using LED which has such a characteristic, in the front direction of LED lighting apparatus 3B, the irradiation light from two LED41,42 is piled up, and sufficient illumination intensity of irradiation light can be ensured.

  In the LED lighting device 3B, sufficient illuminance is ensured in the front direction in which sufficient illuminance cannot be secured with each LED 41, 42 in addition to a region where sufficient illuminance is obtained with each LED 41, 42. An illuminating device having sufficient illuminance of irradiation light at a wide irradiation angle can be obtained.

  In the LED lighting device 3C of the third specific example shown in FIG. 13, the three mounting surfaces 35, 36, and 37 are parallel to the tangent line of the cylindrical axis or the annular axis, and intersect with each other at an intersection angle of 120 °. It is the structure to do. Since the irradiation angles of the LEDs 43, 44, and 45 are 120 °, both the LEDs 43 and 44 and the LEDs 44 and 45 have the same irradiation range as that of the LED lighting device 3B (second specific example), each of which is 180 °. Is the irradiation range. Here, the LED 44 is common to both. As described above, the irradiation range of the LED lighting device 3C can be an irradiation range of 180 ° × 2−120 ° = 240 °.

  In the LED lighting device 3C, sufficient illuminance is secured not only in a region where sufficient illuminance can be obtained by each LED 43, 44, 45 but also in a boundary region where sufficient illuminance cannot be secured by each LED 43, 44, 45. The An illuminating device having sufficient illuminance of irradiation light at a wide irradiation angle can be obtained.

  The LED lighting device 3D of the fourth specific example shown in FIG. 14 illustrates a lighting device having a cylindrical shape. A heat radiating part 49 provided in the LED lighting device 3D is shown. The two mounting surfaces 38 and 39 have a configuration in which the perpendicular has a predetermined angle with respect to the cylindrical axis, and alternately tilts on one end side and the other end side of the LED lighting device 3D. is there. The two mounting surfaces 38 and 39 intersect each other in a mountain shape. Irradiation light spreading in the direction of the cylindrical axis can be obtained.

  In the LED lighting device 3D (fourth specific example), the mounting surfaces 38 and 39 are configured to be alternately inclined to one end side and the other end side of the LED lighting device 3D. It is also possible to use other configurations for the inclination and the crossing angle between the mounting surfaces. For example, if a mounting surface having inclinations in a plurality of directions is provided, irradiation light having directivity in those directions can be obtained.

  Further, when combined with the first to third specific examples, etc., it is possible to obtain irradiating light having a broadness in the cylindrical axis direction and having directivity.

  The LED illumination devices 4A to 4C and 5 illustrated in FIGS. 15 to 18 are embodiments of other LED illumination devices illustrating the present invention.

  The LED lighting devices 4A to 4C are the fourth embodiment. The LED lighting device 4A as the first specific example has a configuration in which the positional relationship between the light passage portion and the heat dissipation portion of the LED lighting device 1 exemplified as the first embodiment is sequentially changed along the cylindrical axis. The light passing part 51 and the heat radiating part 52 rotate along the cylindrical axis, and have a 90 ° twist between both end parts of the LED lighting device 4A.

  Thereby, the direction of the irradiation light continuously rotates along the cylindrical axis direction, and an LED illumination device 4A that exhibits an illumination effect twisted by 90 ° between both ends can be obtained. A special lighting effect can be obtained.

  In the LED illumination device 4A, the case where the direction of the irradiation light continuously changes along the cylindrical axis is exemplified, but a configuration in which the direction of the irradiation light changes stepwise is also possible. It is also possible to irradiate a plurality of directions with a single lighting device by changing the directions of the light passing portion and the heat radiating portion.

  The configuration of the LED lighting device 4A (first specific example) is possible because the present invention makes the light passing portion and the heat radiating portion different from each other and configures the lighting device by connecting and fixing both. As a skeleton of the LED lighting device, it has a heat dissipating part that makes the positional relationship between the mounting surfaces different for each predetermined length in the cylindrical axis direction, and realized by simple assembly that connects and fixes the light passing part to each mounting surface can do.

  The LED lighting device 4B as the second specific example divides the outer peripheral edge into six by a boundary line parallel to the cylindrical axis. Every other region is a light passage portion 54, 55, 56, and a region sandwiched between the light passage portions 54, 55, 56 is a heat dissipation portion 53. If the division is performed equally, the light passage portions 54, 55, and 56 can be configured as individual illuminations that are partitioned by approximately 120 ° around the cylindrical axis.

  Thereby, the whole circumference (360 degrees) of a cylindrical axis | shaft can be illuminated using one LED lighting apparatus 4B.

  In addition, in LED lighting apparatus 4B, although the structure which a light passage part is divided into 3 around an outer periphery is illustrated, this invention is not limited to this. It is also possible to divide the light passage part into two parts around the outer peripheral edge or to divide it into four minutes or more. Moreover, the width of each light passage part can be set freely, and the illumination intensity of the irradiation light of LED mounted can also be selected freely. While enabling lighting in all directions with a single lighting device, the amount of light in each direction, the directivity of the irradiation light, and the illumination color can be set individually, producing an unprecedented lighting effect. Can do.

  The configuration of the LED illumination device 4B (second specific example) is possible because the present invention configures the illumination device by separately configuring the light passage portion and the heat dissipation portion and connecting and fixing them. As a skeleton of the LED lighting device, it can be realized by providing a heat radiating fin in a plurality of directions and having a heat radiating portion having a mounting surface in a region sandwiched between the heat radiating fins.

  The LED lighting device 4C, which is a third specific example, has a configuration in which heat radiating portions 58 and 59 are provided at both ends of the cylindrical shaft, and a light passage portion 60 is provided in a central portion sandwiched between the heat radiating portions 58 and 59. The light passage portion 60 has a cylindrical shape and includes a connection portion (not shown) for connecting the heat dissipation portions 58 and 59 therein. If both surfaces of the connecting portion are used as LED mounting surfaces, all directions around the cylindrical axis can be illuminated.

  As a result, the LED has a shape compatible with the conventional fluorescent lamp illumination device, and has excellent heat radiation characteristics while having omnidirectional irradiation light spreading in all directions similar to the conventional fluorescent lamp illumination device. The lighting device 4C can be obtained.

  In addition, in LED lighting apparatus 4C, although the case where the thermal radiation part was provided in the both ends of the cylindrical axial direction was illustrated, this invention is not limited to this. A configuration in which the heat dissipating part is in the middle or central part in the cylindrical axis direction is also possible. Moreover, it can also be set as the structure provided with three or more places which heat-radiating part spaces apart.

  In addition to being able to freely set the shape and size of each lighting area, adjusting the specifications of the irradiation light of each lighting area, the illumination intensity, light spread, lighting color, etc. of each area Production effects can be adjusted freely.

  Also in the case of the LED lighting device 4C (third specific example), the present invention is possible because the light passing portion and the heat radiating portion are separately configured and the lighting device is configured by connecting and fixing the two. This can be realized by providing a heat dissipating part including a part constituting the heat radiating fin and a part constituting the mounting surface as a skeleton of the LED lighting device.

  The LED lighting device 5 is a fifth embodiment. It has an annular shape. This shape is compatible with an annular fluorescent lamp illumination device used for home use. It can be set as the structure similar to the structure of 1st thru | or 4th Embodiment demonstrated about the cylindrical LED illuminating device.

  As described above in detail, according to the LED lighting device according to the present embodiment, the outer peripheral shape of the LED lighting devices 1, 2A to 2B, 3A to 3D, and 4A to 4C is compatible with the fluorescent lamp lighting device. The LED lighting device 5 has a certain cylindrical shape, and the outer peripheral edge shape of the LED lighting device 5 has an annular shape compatible with the fluorescent lamp lighting device. In addition, a part of the outer peripheral edge of the cylindrical and annular shape, which corresponds to the first outer surface, is provided with a fin structure of the heat radiating portions 11, 48, 49, 52, 53, 58, 59.

  Thereby, it is a shape compatible with a fluorescent lamp illumination device, and sufficient heat dissipation performance is ensured. The heat generated by the light emission of the LED is efficiently radiated through the heat radiating portions 11, 48, 49, 52, 53, 58, 59, and the LED lighting devices 1, 2A-2B, 3A-3D, 4A-4C, 5 Temperature rise can be suppressed.

  According to the LED lighting device of the present invention having sufficient heat dissipation characteristics for an LED having temperature characteristics that the higher the temperature, the lower the luminous efficiency and the sufficient illuminance cannot be obtained and the life of the device is shortened. The temperature rise accompanying the light emission can be suppressed.

  In order to secure the illuminance, even when a high-power LED is used and a large number of LEDs are mounted, sufficient heat dissipation is possible, and the temperature rise of the LED lighting device can be suppressed. Thereby, compared with a fluorescent lamp illumination device, an LED illumination device having sufficient illuminance can be obtained while sufficiently exhibiting low power consumption and long life characteristics.

  In addition, in an environment where the lighting device is always lit, such as an underground facility such as an underground parking lot, a conventional fluorescent lamp lighting device can be easily replaced, and power consumption can be reduced. In this case, if a LED capable of supplying commercial AC power as it is using the technology disclosed in Japanese Patent Application Laid-Open No. 2004-6582 or a similar technology, a conventional fluorescent lamp illumination device is used as it is and a fluorescent tube is used. It can be turned on by replacing the LED lighting device of the present invention.

  In addition, many fluorescent lamp illumination devices are used in showcases for displaying and selling products in stores. This fluorescent lamp illumination device can be replaced by the LED illumination device of the present invention. In this case, the illuminance, the directivity of the illumination, the illumination color, etc. can be freely adjusted according to the display method of the exhibited product. Furthermore, it is also possible to individually illuminate by changing the lighting effect for each exhibition product in the showcase with one LED lighting device. By using various colored LEDs, illumination with a high CRI index (rendering performance) can be realized.

  In addition, according to the LED illumination device of the present invention, the lens function of the light passage portion can be configured in various ways, the LED mounting surface can be configured in various ways, and the heat radiation portion and the light passage portion can be freely shaped and arranged. Various configurations such as being able to be configured in combination are possible, and the CRI index (rendering performance) of the lighting device can be further enhanced.

The present invention is not limited to the above-described embodiment, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the present invention.
For example, in 1st thru | or 5th embodiment, LED illuminating device 1, 2A-2B, 3A-3D, 4A-4C, 5 is disclosed, and a cylindrical shape is substantially 2 with the heat radiating part 11 and the light passage part 12, respectively. Divided configuration (first embodiment), configuration (second embodiment) having a lens function in the light passage portions 2A and 2B, configuration (third embodiment) having a plurality of mounting surfaces, heat radiation portion and light passage The configuration related to the arrangement relationship with the parts (fourth embodiment) and the configuration having the annular shape (fifth embodiment) have been described individually.
However, in the present application, the first to fifth embodiments are not limited to being implemented individually. In the case of having a cylindrical shape, the case of having an annular shape can be realized by freely combining the first to fourth embodiments.
By appropriately combining according to the specification of illumination, it is possible to realize an illumination device that exhibits various illumination effects.

It is a perspective view of the LED lighting apparatus of 1st Embodiment. In the LED illuminating device of 1st Embodiment, it is a perspective view of the state which excluded the light passage part. It is a top view of the LED lighting apparatus of 1st Embodiment. It is a front view of the LED lighting apparatus of 1st Embodiment. It is a bottom view of the LED lighting apparatus of 1st Embodiment. It is AA sectional drawing of the LED lighting apparatus of 1st Embodiment. It is a figure which shows the light passage part with which the LED lighting apparatus of the 1st specific example of 2nd Embodiment is equipped. It is a figure which shows the light passage part with which the LED lighting apparatus of the 2nd specific example of 2nd Embodiment is equipped. It is a figure which shows the detail (1) of the light passage part of the 2nd specific example of 2nd Embodiment. It is a figure which shows the detail (2) of the light passage part of the 2nd specific example of 2nd Embodiment. It is a figure which shows the mounting surface of LED of the 1st specific example of 3rd Embodiment. It is a figure which shows the mounting surface of LED of the 2nd specific example of 3rd Embodiment. It is a figure which shows the mounting surface of LED of the 3rd specific example of 3rd Embodiment. It is a figure which shows the mounting surface of LED of the 4th specific example of 3rd Embodiment. It is a perspective view which shows the LED lighting apparatus of the 1st specific example of 4th Embodiment. It is a perspective view which shows the LED lighting apparatus of the 2nd example of 4th Embodiment. It is a perspective view which shows the LED lighting apparatus of the 3rd specific example of 4th Embodiment. It is a perspective view which shows the LED lighting apparatus of 5th Embodiment.

Explanation of symbols

1, 2A, 2B, 3A to 3D, 4A to 4C, 5 LED illuminators 11, 48, 49, 52, 53, 58, 59 Radiating parts 12, 51, 54 to 56, 60 Light transmitting parts 13, 41 to 45 LED
14, 46, 47 Circuit boards 15, 31 to 39 Placement surface 16 Screw 17 Screw placement part 18 Convex part 19 Concave part 20 Notch part 21, 22 Light passing part 23 Slit 24A Concave piece 24B Convex piece

Claims (11)

An LED lighting device having a cylindrical or annular shape whose outer peripheral shape is compatible with a fluorescent lamp lighting device,
A plurality of LEDs;
While constituting the first outer surface of the outer periphery, the heat dissipating part having the LED mounting surface inward,
An LED illumination device comprising: a light passing portion that forms a second outer surface excluding the first outer surface of the outer peripheral edge and covers the mounting surface.     The LED illuminating apparatus according to claim 1, wherein the heat radiating portion includes a concavo-convex structure having the outer peripheral edge as a vertex.   The LED lighting device according to claim 2, wherein the convex portion and / or the concave portion in the concavo-convex structure are configured to run in parallel with the cylindrical or annular axis.   The LED lighting device according to claim 2, wherein the convex portion in the concavo-convex structure includes a notch portion or / and an opening penetrating the convex portion for each predetermined length. The heat dissipating part includes a plurality of mounting surfaces having a predetermined crossing angle with each other,
The LED lighting device according to claim 1, wherein the LED is placed on each of the placement surfaces.   6. The LED lighting device according to claim 5, wherein the placement surface is parallel to a tangent to the cylindrical axis or the annular axis. The predetermined intersection angle is:
180 °-(illumination angle of the LED)
The LED illumination device according to claim 6, wherein the angle is equal to or greater than that.   The LED illumination device according to claim 1, wherein the light passage portion includes a fine surface having an angle different from that of the outer peripheral edge.   The LED illumination device according to claim 8, wherein the fine surface is disposed in a first direction intersecting an arrangement direction line connecting the LEDs.   The LED illumination device according to claim 9, wherein the fine surface is further disposed in at least one direction intersecting the first direction. 11. The LED lighting device according to claim 8, wherein the light passage portion includes a fine convex portion or / and a fine concave portion on a surface thereof.