JP2007059220A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system allowing solid-state light emitting elements to be arranged at high density and capable of suppressing irregularity of light distribution. <P>SOLUTION: In a spotlight 1 of this embodiment, a second heat radiation means 40 for transmitting heat of a first heat radiation means 30 thereto through a heat transfer part 34 is formed in its outside. Accordingly, even if a plurality of LEDs 13 are arranged on a board 12a in a planar and dense form, the heat of the LEDs 13 can efficiently be radiated, whereby an LED arrangement part 12 can be miniaturized. Since the spotlight is so structured as to radiate the heat of the plurality of LEDs 13 through the first and second heat radiation means 30 and 40 of common heat radiation means, light emitted from the LEDs 13 can be set nearly at a design value as compared with a structure where a heat radiation means is formed for each LED because there is no dispersion in the heat radiation means. Thereby, the dispersion of light distribution can be suppressed and the spotlight 1 allowing a user to easily handle it can be provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lighting device using a plurality of solid state light emitting elements such as LEDs.

  In general, halogen light bulbs and discharge lamps are widely used as light sources for spotlights used for lighting in theaters and television studios. However, in recent years, spotlights have become increasingly bright due to the increase in light intensity of solid state light emitting devices such as light emitting diodes. Attention has been focused on the use of these elements as light sources for lights.

  This type of solid state light emitting device can obtain a light amount of relatively high output with respect to the substantial size of the light emitting region, and since the light emitting region is small, it is easy to control the light distribution and is combined with a resin lens or the like. Thus, there is an advantage that the directivity of light can be easily determined. For this reason, it is suitable for light irradiation only in a desired region, and it is expected that effective light conversion efficiency is expected to increase as much as unnecessary light leakage does not occur.

  In LED spotlights using light emitting diodes (LEDs), taking advantage of this advantage, a large number of directional LEDs are arranged as light sources, and the irradiation beam of each LED is condensed at one point to create a virtual single point light source unit The illuminance and illuminance distribution of the irradiated surface are changed by changing the positional relationship between the light source unit and the lens.

Then, the present applicants have arranged a plurality of light emitting diodes of different emission colors each capable of controlling the amount of light as a light source, and by mixing the emitted light of these light emitting diodes, the LED type that can change the color tone of the irradiation light A spotlight was developed (see, for example, Patent Document 1).
JP 2005-158699 A

  In such a conventional technique, in order to use a plurality of LEDs, heat dissipation must be sufficiently taken into consideration. That is, since the optical characteristics of the LED change as the temperature rises, it is necessary to promote the heat dissipation of the LED as much as possible in order to obtain a desired illuminance.

  On the other hand, the present applicant discloses a configuration in which a plurality of LEDs are arranged on a curved surface, and the LEDs are arranged in a single radiator while being divided into separate members having a heat dissipation effect. is doing. Thereby, the improvement effect of the heat dissipation effect is obtained.

  On the other hand, in the case of the above conventional configuration, since the LEDs are provided on different members and arranged on a curved surface, there is a problem that the LED array portion itself becomes large. That is, since a mounting space for disposing the heat dissipating member provided with each LED on the substrate is required, the LED array portion may be enlarged, and the lighting device is large in order to obtain a desired illuminance. It may become.

  Further, in the above-described conventional configuration, each LED is disposed on an independent heat dissipation member. Therefore, if the thermal conductivity varies for each heat dissipation member, the temperature of each LED at the time of lighting also varies. There is also a risk that it may be difficult to set the illuminance.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an illumination device that can dispose solid light-emitting elements with high density and can suppress unevenness in light distribution. To do.

  The lighting device according to claim 1 is an element array portion in which a plurality of solid state light emitting elements arranged in a planar shape are mounted on the same substrate; first heat radiation means provided directly on the substrate of the element array portion A heat transfer means provided so as to project from the first heat dissipating means; a second heat dissipating means connected to the first heat dissipating means via the heat transfer means; An instrument main body provided to mix the light emitted from the unit and project it in a predetermined direction.

  In the present invention and each of the following inventions, each configuration is as follows unless otherwise specified.

  Solid-state light emitting devices typically include light emitting diode devices, semiconductor lasers, or carbon

This applies to solid-state light-emitting devices using nanotubes.

Regardless, different types can be used as needed.

  The element array section arranges the plurality of LEDs side by side in a plane so that the light beams from the plurality of solid state light emitting elements are directed to predetermined positions on a substrate formed in a plate shape with an insulating material, for example. Configured.

  The board | substrate used for an element arrangement | sequence part should just be comprised with the member with high heat conductivity, and a material, a shape, etc. are not specifically limited. For example, some can be deformed, and some can be made of metal.

  The first heat dissipating means is provided directly with the substrate of the element array part, for example, in such a configuration that heat generated from the solid light emitting element is directly conducted to the first heat dissipating means through the substrate of the element array part. . In other words, any structure or the like may be used as long as the substrate on which the solid light emitting element is disposed is in close contact with the first heat radiation unit.

  The heat transfer means is not particularly limited as long as it is composed of a member having high thermal conductivity.

  The second heat radiating means may be provided inside the instrument body or may be provided outside the instrument body. Note that it is preferable to provide the second heat dissipating means outside the instrument body and exposed to the outside, since the heat dissipating efficiency is further improved.

  The second heat radiating means radiates heat generated from the solid light emitting element together with the first heat radiating means. That is, the element array portion is provided with a plurality of solid state light emitting elements. However, if only the first heat radiating means is provided, the first heat radiating element has a large amount of heat generated by the plurality of solid state light emitting elements. The means must be increased in size, and even if the element arrangement portion can be reduced in size, the instrument body does not contribute to downsizing. On the other hand, by providing the second heat dissipating means, it is possible to suppress the increase in size of the instrument body.

  The illuminating device according to claim 2 is the illuminating device according to claim 1, wherein the fixture main body includes an aperture portion having an aperture that is irradiated with the radiated light from each solid-state light emitting element of the element array portion to become a pseudo light source portion. And a lens that collects the light that has passed through the aperture and emits the light to the outside, and the second heat radiating means is disposed in the instrument body in the region between the outermost solid light emitting element and the aperture section of the element array section. It is stored.

  The aperture part has an aperture at a predetermined position, and the plurality of solid state light emitting elements of the element array part are attached toward the aperture part aperture, so that most of the light from the plurality of solid state light emitting elements is apertured. A light beam is irradiated toward the aperture of the part. Accordingly, the aperture of the aperture unit becomes a pseudo light source unit, and the pseudo light source unit emits light toward, for example, a spotlight lens.

  The lens is provided at a distance from the aperture of the aperture part, collects the emitted light emitted from the aperture of the aperture part, and includes a spherical lens and a flat lens. It also includes the case of having a two-group lens using one or two or more lenses.

  The outermost outline of the element arrangement portion is a solid-state light emitting element arranged at a position farthest from the aperture. Therefore, the shape of the element array part is not particularly limited, but it is a condition that the outer dimension of the element array part is larger than the aperture of the aperture part.

  The region between the outermost solid light-emitting element and the aperture portion of the element array portion includes a beam axis on which the outermost solid light-emitting element irradiates a light beam toward the aperture of the aperture portion, and an outermost solid light-emitting element. This is a region surrounded by the light emitting element and the aperture portion. It is preferable that partition means for partitioning the region from the element placement portion and the aperture of the aperture portion is used, and the partition means also serves as a shielding means for shielding heat. This prevents the heat radiation from the second heat radiating means from thermally affecting each solid light emitting element of the element arrangement portion. Therefore, the efficiency of the solid light emitting element can be achieved even if the second heat radiating means is disposed in the region. There is no reduction.

  According to the first aspect of the present invention, since a plurality of solid-state light emitting elements can be arranged in density, the element arrangement portion can be reduced in size, and the instrument main body that houses the element arrangement portion can be reduced in size. . In addition, since the plurality of solid state light emitting elements are disposed in the common heat radiating means, the difference in efficiency of the solid state light emitting elements due to variation in the heat radiation action can be suppressed, and stable illuminance can be ensured.

  According to the second aspect of the present invention, since the second heat dissipating means is disposed using the region in the instrument main body that is not optically used, the special region for disposing the second heat dissipating means is defined as the instrument. It is not provided on the main body. Therefore, even when the second heat dissipating means is disposed in the instrument body, it is possible to prevent the instrument body from becoming large.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a spotlight 1 according to the first embodiment of the present invention.

  A plurality of LEDs 13 are attached as solid-state light emitting elements to the LED array section 12 which is an element array section, and in addition to a white LED for a main beam that emits a specific light color, a complementary color LED having a light color different from that of white Is attached. Here, the LED 13 can be a bullet type or a high output power LED having a relatively large light output. Further, as the complementary color LED, for example, red, green, blue, etc. Colored LEDs can be used alone or in appropriate combination.

  The plurality of LEDs 13 of the LED array unit 12 are arranged in a plane on a plate-like substrate 12a, and the apertures 16 are mixed so that emitted light is mixed in a region where the apertures 16 are located. It is arranged so that the beam is emitted toward the center.

  Further, on the back side of the substrate 12a, a heat radiating plate (not shown) mainly made of aluminum having high thermal conductivity is disposed so as to be integrated. And the 1st heat radiating means 30 is directly arrange | positioned at the said heat sink.

  The first heat radiating means 30 is mainly formed of aluminum having a high thermal conductivity, and is formed of a base portion 31 and a heat radiating portion 32 provided directly on the substrate 12a. The base portion 31 is fixed so as to be in contact with the heat radiating plate of the substrate 12a, and the heat radiating portion 32 is formed with a plurality of heat radiating fins 33.

  Further, a heat transfer section 34 that is a heat transfer means mainly made of aluminum is extended between the base 31 of the first heat dissipation means 30 and the heat dissipation section 32. Since the heat transfer section 34 is arranged thermally continuously with the first heat radiating means 30, the heat of the LED 13 is transferred through the heat radiating plate and the base 31. A plurality of heat transfer sections 34 can be provided.

  The second heat radiating means 40 is formed with the same structure as that of the first heat radiating means 30, and includes a base portion 41 and a heat radiating portion 42. The second heat radiating means 40 is provided with one end of the heat transfer section 34 extending from the first heat radiating means 30. That is, it is in a state where it is connected to the first heat radiating means 30 via the heat transfer section 34.

  The second heat radiating means 40 is disposed on the upper side of the spotlight body 19. That is, the second heat radiation means 40 is disposed in a state where it is directly exposed to the outside air.

  The aperture unit 15 blocks the turbulent light outside the area of the aperture 16 among the radiated light of the plurality of LEDs 13 attached to the LED array unit 12, and, for example, the condensing lens of the spotlight 1 through the aperture 16. The radiated light of the LED 13 is allowed to pass toward 17.

  Thus, since the aperture portion 15 is provided so that the aperture 16 is positioned at a predetermined position where the light beams of the plurality of LEDs 13 attached to the LED array portion 12 are condensed, the aperture 16 is a pseudo light source. Can be considered.

  The condensing lens 17 is disposed in a spotlight body 19 to be described later apart from the aperture portion 15, and condenses the emitted light emitted from the LED array portion 12 and the aperture 16. The condensing lens 17 can be composed of a spherical lens or a flat lens. In this embodiment, the case where one Fresnel lens is used is shown.

  In addition, a diffusing plate 18 is provided as a translucent portion between the aperture 16 of the aperture portion 15 and the condensing lens 17 and is formed of a material such as resin. It is formed so as to have a desired light distribution.

  The spotlight main body 19 is formed of, for example, a metal box, and houses the LED array portion 12, the aperture portion 15, the condenser lens 17, and the like.

  A known moving mechanism 20 is provided so that the distance between the condenser lens 17 and the aperture 16 can be made relatively variable. The moving mechanism 20 includes a light source focus handle 20a, and the moving mechanism 20 relatively varies the separation distance between the LED array unit 12 and the condenser lens 17 so that the light irradiation area on the irradiated surface is reduced. It changes so that the amount of light changes.

  Further, the spotlight body 19 on the condenser lens 17 side is provided with a bander 21, and by adjusting the opening / closing angle of the bander 21, the irradiation range of light from the spotlight 1 is blocked and adjusted as desired. .

  A lighting device (not shown) that supplies lighting power suitable for the LED 13 is housed in a lighting device housing portion 19 a located below the spotlight body 19. This lighting device converts the commercial power supplied to a low wattage direct current adapted to the LED, and in response to a dimming signal such as a DMX signal output from the outside, for the white LED and the complementary color LED of the main beam The lighting power can be adjusted independently.

  According to the spotlight 1 as described above, the second heat radiating means 40 can radiate the heat generated from the LED 13 together with the first heat radiating means 30. That is, the LED array unit 12 is provided with a plurality of LEDs 13. However, if only the first heat radiating means 30 is provided, the first heat radiating means 30 may be used when the heat generation amount of the plurality of LEDs 13 is large. Therefore, the spotlight body 19 may be enlarged. On the other hand, by providing the second heat radiating means 40 that is also thermally continuous with the first heat radiating means 30 via the heat transfer section 34, the spotlight body 19 can be prevented from being enlarged. Moreover, since the 2nd thermal radiation means 40 is arrange | positioned outside the spotlight main body 19, it can improve the thermal radiation effect.

  Furthermore, by providing the second heat dissipating means 40 as described above, the plurality of LEDs 13 are planar on the substrate 12a and can be arranged in density. That is, in consideration of downsizing of the LED array portion 12, it is preferable to arrange the plurality of LEDs 13 in a plane and closely arrange them (hereinafter referred to as “density arrangement”). However, if the LEDs 13 are simply arranged at a high density, the heat generated from the individual LEDs 13 promotes the high temperature of the LEDs 13 and the LED array part 12 and the high temperature in the storage part for storing the LED array part 12, The light emission efficiency of LED13 will fall. On the other hand, according to the present embodiment, by providing the second heat radiating means 40 in a region different from the first heat radiating means 30, the amount of heat that cannot be radiated only by the first heat radiating means 30 is given by the second heat radiating means. Since heat radiation is realized using 40, the temperature rise of the LED 13 can be efficiently suppressed. Therefore, the LED array part 12 itself can be miniaturized, and the spotlight body 19 can be prevented from being enlarged.

  Furthermore, since the heat generated from the plurality of LEDs 13 is directly transferred to the first heat radiating means 30 and the second heat radiating means 40 which are common heat radiating means, the heat radiating means is provided for each LED. Compared to the configuration, since there is no variation in the heat radiation means, the irradiation light from the LED 13 can be adjusted substantially as designed, so even if a plurality of LEDs 13 are used, the user can easily handle them. The spotlight 1 can be obtained.

  Next, a second embodiment will be described with reference to FIG. FIG. 2 is a schematic configuration diagram of the spotlight 1 according to the embodiment of the present invention. Note that the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  A major difference from the first embodiment is that a plurality of second heat radiation means 40 are provided in the spotlight body 19. That is, the second heat dissipating means 40, 40 (formed slightly smaller than the first embodiment) is between the outermost LED 13A and the aperture portion 15 of the LED array portion 12, and the LED array portion 12 and the aperture. 16 is housed in a housing portion 51 that is partitioned by a shielding light source 50 that is partitioned from a pseudo light source portion.

  That is, the second heat dissipating means 40, 40 is characterized in that the housing part 51 is provided with the heat dissipating means using the regions 53, 53 that would normally be dead spaces. In the configuration of the pseudo light source as in the present embodiment, the outer regions 53 and 53 of the light axis in which the outermost LED 13A of the LED array unit 12 irradiates the light beam toward the aperture 16 of the aperture unit 15 are: It has little effect on the function of the pseudo light source. Therefore, the regions 53 and 53 are partitioned by the shielding plate 50, and the storage portions 51 and 51 are provided so that the two second heat radiation means 40 and 40 can be disposed.

  The shielding plate 50 has a high effect of shielding heat. Thereby, the heat radiation from the second heat radiation part 40 is prevented from being transmitted to the aperture 16 and the LED array part 12 side. The spotlight body 19 is made of a metal material, and is formed of a member having a relatively high thermal conductivity. Therefore, the heat radiation from the second heat radiation portion 40 is radiated to the outside through the spotlight body 19.

  According to the present embodiment, in addition to the operation of the first embodiment, a new area for disposing the second heat radiating means 40, 40 may not be provided in the spotlight body 19. , 40 are accommodated in the accommodating portions 51, 51 in the spotlight body 19, so that the spotlight 1 does not increase in size even if a plurality of heat dissipating means are provided.

  In addition, since the two second heat radiating means 40 and 40 are housed in different areas 51 and 51, respectively, it is possible to obtain an efficient heat radiating effect without being affected by each other's heat.

Schematic block diagram showing the spotlight of the first embodiment Schematic configuration diagram showing the spotlight of the second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Spotlight, 12 ... LED arrangement part which is an element arrangement | positioning part, 15 ... Aperture part, 17 ... Lens, 19 ... Spotlight main body which is an instrument main body, 30 ... No. 1 heat dissipation means, 34... Heat transfer means, 40.

Claims (2)

An element array portion in which a plurality of solid state light emitting elements arranged in a plane are mounted on the same substrate;
First heat dissipating means provided directly on the substrate of the element array portion;
A heat transfer means provided projecting from the first heat dissipation means;
A second heat dissipating means connected to the first heat dissipating means via the heat transfer means;
An instrument body provided to house the element array part, mix the radiated light from the element array part and project it in a predetermined direction;
A lighting device comprising: The instrument body includes an aperture portion having an aperture that is irradiated with the radiated light from each solid-state light emitting element of the element array portion and serves as a pseudo light source portion, and a lens that collects the light that has passed through the aperture and emits the light to the outside. Have
The lighting device according to claim 1, wherein the second heat radiating means is housed in a fixture main body in a region between the outermost solid light emitting element and the aperture portion of the element arrangement portion.

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