JP2013143397A - Led light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED light source device having a simple structure, high versatility, and a high degree of freedom of design when being applied to an illuminating device.SOLUTION: An LED light source device comprises a polyhedron 3 including a plurality of surfaces 4 each having one or more LED chips 1 disposed thereon via an insulator, and vertical direction axes R of the respective surfaces 4 each having the LED chip 1 disposed thereon crossing each other at one intersection C in an inner center portion of the polyhedron 3. The device radially illuminates light using the intersection C as a center when the LED chips 1 illuminate light toward the outside of the polyhedron 3 along directions of the vertical direction axes R. The device may include heat dissipation means 5 for transmitting heat from the intersection of the vertical direction axes R of the respective surfaces 4 to the outside of the polyhedron 3O to dissipate the heat. One end of the heat dissipation means is provided in the inside of the polyhedron 3, and the other end thereof is led out to the outside of the polyhedron 3.

Description

  The present invention relates to an LED light source device formed using an LED (light emitting diode).

  Conventionally, as a lamp light source, a light source having a light irradiation angle range of 360 degrees with respect to a lamp center (illumination center) such as an incandescent lamp is used. In recent years, LEDs have attracted attention as light sources (see, for example, Patent Documents 1 and 2).

  The LED is used as an LED chip 1 in which p-type and n-type semiconductors 13 and an active layer 14 are formed on, for example, a sapphire substrate 2 as shown in FIG. The light is irradiated by passing an electric current from. Although the size of the LED chip 1 is various, for example, a small one of 0.3 mm to 1 mm is generally used, and the irradiation direction of light emitted from the LED chip 1 is as shown by an arrow A in the figure A vertical axis with respect to the substrate 2.

  As a light source device using the LED chip 1, for example, as shown in FIG. 4B, a configuration in which the LED chip 1 is provided in a package including a resin cap 15 to control the light irradiation direction is generally used. ing. The light irradiation area of the light source device is centered on the vertical axis with respect to the substrate 2, and the irradiation angle is widened by controlling the light irradiation angle with the resin cap 15.

JP 2005-239354 A JP 2009-187773 A

  By the way, at present, as illumination in industrial fields such as parking lots and sports stadiums such as baseball and soccer, lighting devices with high illuminance using mercury lamps, sodium lamps, etc. are used. Since each light quantity is not large, it is necessary to dispose a large number of LED light source devices in order to use the lighting device in the industrial field as described above.

  However, the irradiation angle based on the lamp center of the LED light source device as shown in FIG. 4B is 180 degrees at most, and the irradiation angle range of the general illumination is 360 degrees, but is narrow at about half. . Therefore, when a conventional LED light source device is provided with a plurality of LED light source devices to form an illuminating device in the industrial field, there is a problem that the degree of freedom of design is reduced and the LED light source device cannot be used effectively.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a wide illumination angle range, uniformly illuminate the range, high versatility as a lighting fixture, and an industrial lighting device. Another object of the present invention is to provide an LED light source device that can increase the degree of freedom in design even when used in the above.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, according to the first aspect of the present invention, one or more LED chips are disposed on the surfaces of a plurality of surfaces forming a polyhedron, and the vertical axis of each surface on which the LED chips are disposed is the interior of the polyhedron. It is formed in an aspect where it intersects at one intersection in the central part, and radiates light radially around the intersection by irradiating light from the LED chip toward the outside of the polyhedron along the vertical axis. It is a means to solve the problem with the configuration of irradiation.

  Further, in the second invention, in addition to the configuration of the first invention, one end side of a heat radiation means for dissipating heat by transferring heat from the intersection of the vertical axes of each surface to the outside of the polyhedron is provided inside the polyhedron. The other end side of the heat dissipating means is drawn out of the polyhedron.

  Further, the third invention is characterized in that, in addition to the configuration of the second invention, a current supply path to the LED chip is provided in a portion drawn out from the polyhedron of the heat radiating means.

  Further, in the fourth invention, in addition to the configuration of the second or third invention, the other end side of the heat radiating means is connected to an external holding member that holds the polyhedron, and is pulled out from the polyhedron of the heat radiating means. The region that is also used as a connection support portion to the holding member of the polyhedron is characterized in that

  Further, according to a fifth invention, in addition to the configuration of any one of the first to fourth inventions, the polyhedron is formed in a spherical shape, and the outer diameter of the spherical polyhedron is formed to be 80 mm or less. It is characterized by.

  According to the present invention, one or more LED chips are disposed on the surfaces of a plurality of surfaces forming a polyhedron, and the vertical axis of each surface on which the LED chips are disposed is located at the inner central portion of the polyhedron. Formed to intersect at one intersection, and irradiate light radially around the intersection by irradiating light from the LED chip toward the outside of the polyhedron along the vertical axis The light irradiation angle range with reference to the center of the light source can be 360 degrees (can be regarded as a virtual point light source). Further, the LEDs can be highly integrated, and sufficient illuminance can be easily ensured.

  As described above, the LED light source device of the present invention has a wide irradiation angle range, can uniformly irradiate the range, and is highly versatile as a lighting fixture with a simple configuration, and can be used for lighting devices in the industrial field. Since the degree of freedom of design can be increased and the illuminance can be secured by high integration of LEDs, the LED light source device of the present invention can be used as an alternative light source for industrial lighting devices such as conventional mercury lamps. Thus, it is possible to form an illumination device in an industrial field that can save energy using an LED chip.

  Further, since heat is generated when light is emitted from the LED chip, for example, in a conventionally used light bulb type LED light source device, a heat dissipation structure is provided such as providing unevenness on the outer peripheral side of the support portion on the LED substrate side. However, in the present invention, one end side of the heat dissipating means is provided inside the polyhedron, and the other end side of the heat dissipating means is drawn out of the polyhedron, and the portion of the polyhedron that becomes hot at the intersection of the vertical axes of each surface and the vicinity The heat can be efficiently radiated to the outside by transferring the heat to the outside of the polyhedron. Therefore, it can suppress that a LED chip deteriorates with a heat | fever, can also improve the light conversion efficiency of the electric power supplied to a LED chip, and can set it as a long-life LED light source device.

  Further, in the configuration in which the heat radiating means is provided, by providing a current supply path to the LED chip in the part drawn from the polyhedron of the heat radiating means, the configuration can be simplified and the LED light source device having a good appearance can be obtained. it can.

  Furthermore, by connecting the other end side of the heat dissipation means to an external holding member that holds the polyhedron, the part drawn out from the polyhedron of the heat dissipation means also serves as a connection support part to the holding member of the polyhedron. The LED light source device in which the polyhedron is connected and held to the holding member can be easily formed with a simple configuration.

  Furthermore, by forming the polyhedron in a spherical shape and forming the outer diameter of the spherical polyhedron to be 80 mm or less, the irradiation direction of the light from the LED can be made uniform, for example, HID ( A high-luminance discharge) lamp can be used for a lighting fixture, and a highly versatile LED light source device can be obtained.

It is the typical perspective view (a) and typical sectional view (b) which show the 1st example of the LED light source device concerning the present invention. It is a typical perspective view which shows 2nd Example of the LED light source device which concerns on this invention. It is explanatory drawing which shows the other example of the polyhedron applied to the LED light source device which concerns on this invention. It is typical sectional explanatory drawing (a) for demonstrating an LED chip, and sectional explanatory drawing (b) which shows the example of the conventional light source device using an LED chip.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 (a) schematically shows a first embodiment of the LED light source device according to the present invention. As shown in the figure, the LED light source device of the first embodiment has a polyhedron 3 formed in a spherical soccer ball shape. The polyhedron 3 is formed by disposing an aluminum substrate around a copper block, and has a spherical shape of 30 by combining 20 regular hexagonal surfaces 4 and 12 regular pentagonal surfaces 4. It is a dihedron. The outer diameter of the spherical polyhedron 3 is formed to an appropriate value of 80 mm or less (for example, about 30 mm).

  One LED chip 1 is disposed on each of the surfaces 4 forming the polyhedron 3 via an insulating layer (not shown). As shown in FIG. Is formed in such a manner that the vertical axis R of each surface on which the is arranged intersects at one intersection C in the inner central portion of the polyhedron 3. In this embodiment, light is irradiated in the direction along the vertical axis R from the LED chip 1 toward the outside of the polyhedron 3, with the intersection C as the center, as shown in FIG. It is characterized by irradiating light radially.

  In addition, on each surface 4 of the aluminum substrate forming the polyhedron 3 applied to the present embodiment, all LED chips 1 provided in the polyhedron 3 are connected by connecting adjacent LED chips 1 adjacent to each other. A printed wiring (not shown) for connecting the LED chips 1 in series is formed, and by mounting the LED chips 1 on each surface 4, an LED chip series connection circuit in which the LED chips 1 are connected in series is formed.

  Further, as shown in FIG. 1B, the polyhedron 3 is formed with a passage-shaped insertion portion 6 having an opening on one end side, and one end side of the heat dissipating means 5 is inserted into the insertion portion 6. The heat dissipating means 5 is a means for dissipating heat by transferring heat from the intersection C of the vertical axis R of each surface 4 of the polyhedron 3 to the outside of the polyhedron 3, and is formed with a copper heat pipe having an outer diameter of 4 mmφ. ing. The other end side of the heat dissipating means 5 is drawn to the outside of the polyhedron 3, and the LED chip 1 is placed on all (31) faces 4 except for one face 4 on which the lead portion of the heat dissipating means 5 is formed. Is provided. The portion of the heat dissipating means 5 inserted into the insertion portion 6 is formed by applying pressure to the fluid in the heat pipe with the heat dissipating means 5 of the heat pipe inserted into the insertion portion 6 when the LED light source device is manufactured. The surface of the heat radiating means 5 is in close contact with the insertion portion 6. In addition, you may provide an adhesive agent with high heat conductivity between the surface of the thermal radiation means 5 and the inner wall of the insertion part 6 as needed.

  In this embodiment, one LED chip 1 is provided on each of the 31 surfaces 4 of the polyhedron 3, and when the output of each LED chip 1 is 1 W, the light source has a total output of 31 W, and the LED chip 1 About 60% of this total output becomes heat, but by using the heat dissipating means 5 of the copper heat pipe, the heat emitted from the LED chip 1 is absorbed so that the heat can be efficiently transferred to the outside. Can be discharged.

  In addition, an electrical wiring 9 is provided in a portion of the heat dissipation means 5 drawn from the polyhedron 3, and the electrical wiring 9 supplies each LED chip 1 by supplying current to the series circuit of the plurality of LED chips 1. It functions as a current supply path for supplying current to. The other end side of the heat dissipating means 5 is connected to an external holding member 7 that holds the polyhedron 3, and a portion drawn out from the polyhedron 3 of the heat dissipating means 5 is a connection support portion for the holding member 7 of the polyhedron 3. Also serves as 8.

  In this embodiment, as shown in FIG. 1, the LED light source device has a configuration in which one holding member 7 is provided with one polyhedron 3, but a plurality of polyhedrons 3 are provided on one holding member 7, and a connection support portion is provided. It is also possible to form a lighting device by connecting with the heat radiating means 5 which also serves as 8, and in this way, it can also be used as lighting in industrial fields such as parking lots and sports stadiums such as baseball and soccer. it can.

  FIG. 2 schematically shows a second embodiment of the LED light source device according to the present invention. In the description of the second embodiment, the same reference numerals are assigned to the same name portions as those in the first embodiment, and the duplicate description is omitted or simplified.

  The second embodiment is configured in substantially the same manner as the first embodiment. The second embodiment is different from the first embodiment in that the holding member 7 is formed by the reflecting mirror 10. That is. As described above, in the second embodiment, the holding member 7 is formed by the reflecting mirror 10 so that the light irradiation angle is given as the direction indicated by the arrow in the drawing.

  In the second embodiment as well, a lighting device can be formed by providing one polyhedron 3, or a lighting device can be formed by providing a plurality of polyhedrons 3, which has a plurality of polyhedrons 3. Thus, as in the first embodiment, it can also be used as industrial lighting.

  In addition, this invention can take various embodiment, without being limited to the said Example. For example, in each of the above-described embodiments, one LED chip 1 is provided on almost all the surfaces 4 of the polyhedron 3 (the surfaces 4 other than the surface on which the radiating means 5 is added). For example, when the number of the surfaces 4 that form the polyhedron 3 is large, a plurality of surfaces 4 that are not provided with the LED chips 1 may be provided, or the LED chips 1 may be provided on all the surfaces 4. Moreover, you may arrange | position the several LED chip 1 in the one surface 4, and the arrangement | positioning aspect and the number of arrangement | positioning of the LED chip 1 are set suitably.

  In each of the above-described embodiments, the outer diameter of the polyhedron 3 is set to 30 mm. However, the size of the polyhedron 3 is not particularly limited and is appropriately set.

  Furthermore, in each of the above-described embodiments, the polyhedron 3 is a thirty-two-hedron, but the number of the surfaces 4 forming the polyhedron 3 is appropriately set. In addition, since the polyhedron 3 can be approximated more spherical (spherical) by increasing the number of the surfaces 4, it is preferable.

  As an example of the polyhedron 3, FIG. 3 shows an example of a regular polyhedron among the polyhedrons 3 applied to the LED lighting device of the present invention, and FIG. 3 (a) shows a regular dodecahedron. FIG. 3B shows a regular icosahedron, FIG. 3C shows a regular octahedron, FIG. 3D shows a regular hexahedron, and FIG. 3E shows a regular tetrahedron. In the present invention, various polyhedrons 3 including such a regular polyhedron can be applied for disposing the LED chip 1. However, as described above, the polyhedron 3 is preferably formed in a spherical shape. The icosahedron of FIG. 3A and the icosahedron of FIG. 3B are preferable.

  Furthermore, in each said Example, although the polyhedron 3 was set as the structure which provided the board made from aluminum on the surface of a copper block, it is formed only with the board made from aluminum, for example, and the LED chip 1 is formed in the polyhedron 3 with a hollow inside. May be provided. In this case, it is desirable to provide a heat conducting member such as a spacer between the aluminum plate and the heat radiating member 5 so that the LED chip 1 and the heat radiating member 5 are thermally connected. In addition, the material of the polyhedron 3 is not particularly limited and may be set as appropriate, but the polyhedron 3 is formed of a material having good heat conduction so that the heat radiating member 5 can radiate heat well. It is preferable to do.

  Furthermore, in each said Example, although the heat radiating member 5 was formed with the heat pipe, the heat radiating member 5 is not restricted to a heat pipe, Metal members, such as aluminum and copper, Metals, such as aluminum and copper, and a carbon nanotube, You may form with the highly heat conductive composite member comprised with carbon materials, such as a graphite.

  Furthermore, in each said Example, the thermal radiation means 5 is connected to the external holding member 7 holding the polyhedron 3, and it is used as the connection support part of the polyhedron 3, and for the current supply to the LED chip 1 to the thermal radiation means 5 Although the electrical wiring 9 is provided, a connection support portion other than the heat dissipation means 5 may be provided, or the electrical wiring 9 may be provided in a connection support portion other than the heat dissipation means 5.

  The LED light source device of the present invention can make the light irradiation angle range with reference to the center of the light source substantially 360 degrees, and it is easy to highly integrate LEDs and ensure sufficient illuminance. It can also be used as a lighting device in the field.

DESCRIPTION OF SYMBOLS 1 LED chip 2 Board | substrate 3 Polyhedron 4 surface 5 Thermal radiation means 6 Insertion part 7 Holding member 8 Connection support part 9 Electric wiring 10 Reflector

Claims (5)

  One or more LED chips are disposed on the surfaces of a plurality of surfaces forming the polyhedron, and the vertical axes of the surfaces on which the LED chips are disposed intersect at one intersection at the inner central portion of the polyhedron. LED which is formed in an aspect and irradiates light radially around the intersection by irradiating light from the LED chip toward the outside of the polyhedron in a direction along the vertical axis Light source device.   Inside the polyhedron is provided one end side of a heat radiating means for radiating heat by transferring heat from the intersection of the vertical axes of each surface to the outside of the polyhedron, and the other end side of the heat radiating means is drawn out of the polyhedron. The LED light source device according to claim 1.   The LED light source device according to claim 2, wherein a current supply path to the LED chip is provided at a portion drawn out from the polyhedron of the heat dissipating means.   The other end side of the heat dissipating means is connected to an external holding member that holds the polyhedron, and a portion drawn out from the polyhedron of the heat dissipating means also serves as a connection support part of the polyhedron to the holding member. The LED light source device according to claim 2 or 3.   5. The LED light source device according to claim 1, wherein the polyhedron is formed in a spherical shape, and the outer diameter of the spherical polyhedron is 80 mm or less.

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