JP5769307B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device, and more particularly, to an illuminating device including a heat radiating unit that suppresses a temperature rise of a light emitting element.

  A device that includes a light-emitting element and performs illumination with visible light emitted from the light-emitting element is referred to as a lighting device. In general, a light-emitting element refers to a solid-state light-emitting element such as a light-emitting diode (LED), but in this specification, refers to all devices that convert electrical energy into visible light and emit it. Therefore, in the present specification, an incandescent lamp and a fluorescent lamp are also included in the light emitting element. Moreover, the place where the lighting device according to the present invention is used and the lighting target are not limited.

  As defined above, a light emitting device is a device that converts electrical energy into visible light, but its conversion efficiency is not 100%. When the light emitting element is energized, a non-negligible proportion of electrical energy is converted into heat, and the temperature of the light emitting element rises. A light-emitting diode is a light-emitting element with high conversion efficiency, but still generates a non-negligible amount of heat. Further, when the temperature of the light emitting element rises, the performance and life of the light emitting element are reduced.

  In order to solve this problem, there is known an illumination device that includes a heat-dissipating member such as a heat sink and cools the light-emitting element.

  For example, in Patent Document 1, an LED light emitting unit is attached to one surface of a cooling panel, a hollow portion is provided on the other surface of the cooling panel, and a water pipe is inserted into the hollow portion to cool the LED light emitting unit. A lighting device is disclosed.

  Patent Document 2 discloses a lighting device that includes a heat storage unit that contacts an LED light source and stores heat generated by the LED light source, and a heat sink that dissipates heat stored in the heat storage unit. The heat storage part and the heat sink of this lighting device are aluminum flat plates, and the heat sink is erected on the opposite surface of the heat storage part to which the LED light source is attached.

JP 2011-54529 A JP 2011-29205 A

  Since the lighting devices disclosed in Patent Literature 1 and Patent Literature 2 cool the light emitting element with water or air, the light emitting element can be prevented from being damaged or performance deteriorated. Further, high luminance light emission is possible. In other words, a high illumination device can be realized.

  However, the lighting device of Patent Document 1 has a problem that it takes time and cost to install the cooling water through the water pipe. In addition, when cooling water is poured, that is, when the cooling water heated by absorbing heat generated by the light emitting element is discarded as it is, there is a problem that the amount of consumption of the cooling water is large. However, if the cooling water is circulated with a device (for example, a radiator) that releases the heat absorbed by the cooling water to the environment, the consumption of the cooling water can be reduced. The problem of being bulky arises.

  On the other hand, since the illumination device of Patent Document 2 includes a heat sink and cools the light emitting element with air, the above-described problem does not occur. However, since the heat generated by the light emitting element is transported to the heat sink by heat conduction in the solid, the heat transfer performance is limited. Further, since no special consideration is given to the air flow around the heat sink, the heat dissipation performance is limited. Therefore, if a desired cooling capacity is obtained, there arises a problem that the outer shape of the cooling means becomes large.

  Moreover, since the external dimension of the illuminating device including the cooling means is limited by the conditions of the installation location, it cannot be increased without limitation. Eventually, the brightness of the lighting device is limited by the conditions of the installation location. In other words, the conventional technique disclosed in Patent Document 1 or Patent Document 2 has a problem that a lighting device capable of emitting light with high luminance cannot be installed in a narrow place.

  The present invention has been made in view of the background as described above, and an object thereof is to provide a small and lightweight lighting device capable of emitting light with high luminance.

In order to achieve the above object, the lighting device of the present invention includes a light emitting element, a heat diffusion member that thermally contacts the light emitting element and diffuses heat transferred from the light emitting element, and one of the heat diffusion members is the heat. A heat transport member that is in heat transfer contact with the diffusion member and transports heat from the one side to the other, and a heat transfer member that is in heat transfer contact with the other side of the heat transport member and heat transferred from the heat transport member. And a heat releasing member for releasing to the environment. The heat releasing member is disposed with a gap with respect to the heat diffusing member, and air that has flowed into the lower portion of the heat releasing member through the gap passes through the heat releasing member to pass through the heat. A plurality of cooling fin rows each having a plurality of cooling fins arranged at intervals are provided so as to flow out above the discharge member, and the plurality of cooling fin rows are stacked in a vertical direction. When the plurality of cooling fin rows are viewed from above, the cooling fins of one of the two adjacent cooling fin rows are arranged so as to intersect with the cooling fins of the other cooling fin row. Is done.

The lighting device of the present invention includes a light emitting element, a heat diffusion member that thermally contacts the light emitting element and diffuses heat transferred from the light emitting element, and one of the heat diffusion members thermally transfers to the heat diffusion member. A heat transport member that contacts and transports heat from the one to the other; and a heat release member that thermally contacts the other of the heat transport members and releases heat transferred from the heat transport member to the environment. With. The heat releasing member is disposed with a gap with respect to the heat diffusing member, and air that has flowed into the lower portion of the heat releasing member through the gap passes through the heat releasing member to pass through the heat. A plurality of cooling fin rows in which a plurality of cooling fins are arranged at intervals are provided so as to flow out above the discharge member. The cooling fin includes a notch in at least one side edge, and the notch of the cooling fin of one cooling fin row and the cooling fin of the other cooling fin row of the adjacent cooling fin row. The notch fits.

The heat diffusion member has a central portion facing the light emitting element, and a peripheral portion surrounding a part or all of the central portion, and the heat transport member transfers heat to the heat diffusion member at the peripheral portion. You may make it contact.

  Further, in the plurality of cooling fin rows, the arrangement axis of one cooling fin row of two adjacent cooling fin rows is in a “twisted” relationship with the arrangement axis of the other cooling fin row. It may be arranged.

  Alternatively, the arrangement axes of the two adjacent cooling fin rows may be arranged so as to be orthogonal to each other.

  Furthermore, the adjacent cooling fins may have different areas.

  The light emitting element may be mounted on a substrate, and the substrate may be in surface contact with the heat diffusing member.

  Moreover, while providing the base | substrate which surface-contacts to the said heat-diffusion member, the one end of the said heat transport member may be couple | bonded with the said base | substrate.

  Further, a plurality of any of the lighting devices described above may be combined.

  According to the present invention, the lighting device includes the heat diffusing member, the heat transporting member, and the heat releasing unit, and the heat generated in the light emitting element is efficiently released to the environment. Therefore, the lighting device can be reduced in size and weight. Can do. In addition, the illumination device can emit light with high brightness. Therefore, it is possible to install a lighting device that can emit light with high luminance even in a narrow place.

It is an external view of the illuminating device which shows embodiment of this invention, (a) is a perspective view, (b) is the arrow line view seen from the B direction in (a). It is a perspective view which shows the external shape of a light emission unit. It is a perspective view which shows the external shape of a base. It is a perspective view which shows the external shape of a heat pipe. It is a perspective view which shows the external shape of a lower cooling fin row and an upper cooling fin row. It is a figure which shows the positional relationship of a light emission unit, a heat spreader, and a base, (a) is a top view, (b) is sectional drawing cut | disconnected by the BB 'line | wire in (a). It is a figure which shows the flow of the cooling air around an illuminating device. It is a perspective view which shows the modification of an illuminating device. It is a perspective view which shows another modification of an illuminating device. FIG. 10 is a perspective view showing a state in which the cooling fins are removed from a set of heat radiation units of the lighting device shown in FIG. 9.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a lighting device 1 showing an embodiment of the present invention. The illumination device 1 is configured by mounting a cooling unit 3 on a light emitting unit 2. The light emitting unit 2 includes a light emitting element and emits illumination light. The cooling unit 3 is a unit that thermally contacts the light emitting unit 2 to cool the light emitting unit 2. In the present specification, when “A and B are in heat transfer contact”, A and B are in direct or indirect contact and heat transfer between A and B is possible. Point to. Therefore, the case where a substance or a device that transports heat is interposed between A and B corresponds to “heat transfer contact”.

  As shown in FIG. 2, the light emitting unit 2 has a plurality of light emitting diodes (LEDs) 5 mounted on one surface of the substrate 4. Further, the other surface of the substrate 4, that is, the surface on which the light emitting diode 5 is not mounted physically contacts the cooling unit 3 (see FIG. 1B). A material having thermal conductivity is selected as the material of the substrate 4. Therefore, the heat generated in the light emitting diode 5 flows to the cooling unit 3 through the substrate 4. That is, the light emitting diode 5 is in heat transfer contact with the cooling unit 3.

  As shown in FIG. 1, the cooling unit 3 includes a heat spreader 6 and a heat radiating unit 7, and the heat radiating unit 7 includes a base 8, a heat pipe 9, a lower cooling fin row 10, and an upper cooling fin row 11.

  The heat spreader 6 is a kind of flat plate heat pipe, and includes a refrigerant flow path from the central part to the peripheral part of the case inside a copper case, and a fluid ( For example, water, ethanol, methanol, acetone, etc.) are enclosed. In addition, since the specific structure of the heat spreader 6 is already well-known, detailed description is abbreviate | omitted. If necessary, see, for example, Japanese Patent No. 4047918.

  As shown in FIG. 3, the base body 8 is a solid metal part having a substantially “B” -shaped planar shape, and has a hole 8 a for mounting the heat pipe 9.

  As shown in FIG. 4, the cooling unit 3 includes eight heat pipes 9. The heat pipe 9 has an “L” shape as a whole, one end 9a is mounted in the hole 8a (see FIG. 3) of the base 8, rises vertically, and is bent at a substantially right angle in the middle to cool down the lower part. The fin row 10 or the upper cooling fin row 11 is inserted (see FIG. 1B), and is in heat transfer contact with the lower cooling fin row 10 or the upper cooling fin row 11. That is, the heat pipe 9 is inserted into each of the cooling fins 10a or 11a (see FIG. 5) constituting the lower cooling fin row 10 or the upper cooling fin row 11, and is in heat transfer contact at the insertion portion. Since it is configured in this way, heat can be transported from the base 8 to the lower cooling fin row 10 or the upper cooling fin row 11 by the heat pipe 9.

  The heat pipe 9 is a pipe-shaped heat transport member, and its operating principle is the same as that of the heat spreader 6. That is, the heat pipe 6 encloses a refrigerant such as water, ethanol, methanol, acetone, etc. in a pipe made of a material having high thermal conductivity such as copper, and the refrigerant vapor is contained inside the pipe. And a liquid flow path through which the liquefied refrigerant flows. The liquid channel may be a simple channel or a channel utilizing capillary action. If the capillary phenomenon can be used, the liquid can be moved regardless of the posture of the heat pipe 9. For example, the liquid can be moved against gravity (from bottom to top). The heat pipe 9 is a well-known device and can be obtained in the market, and therefore a detailed description of the structure and configuration of the heat pipe 9 is omitted.

  As shown in FIG. 5, the lower cooling fin row 10 and the upper cooling fin row 11 are heat diffusion members configured by arranging a plurality of cooling fins 10 a and 11 a at intervals in parallel to each other. The lower cooling fin row 10 and the upper cooling fin row 11 are stacked one above the other, and the arrangement axis X of the lower cooling fin row 10 (the axis connecting the geometric centers of the cooling fins constituting the cooling fin row) and the upper cooling fin row. 11 arrangement axes Y are orthogonal to each other. Therefore, the array axis X and the array axis Y are in a “twisted” relationship. The material of the cooling fins 10a and 11a is an aluminum flat plate, but any material having thermal conductivity (for example, metal material, high thermal conductivity plastic, engineering plastic, graphite, etc.) may be used. Further, as shown in FIG. 1B, the lower cooling fin row 10 is arranged away from the base 8. The lower cooling fin row 10 and the upper cooling fin row 11 are each provided with twelve cooling fins 10a and 11a, but in order to avoid inconvenience, only one of them is given a reference numeral in FIG. Yes.

  The light emitting unit 2, the heat spreader 6, and the base 8 are coupled as shown in FIG. That is, the light emitting unit 2 is mounted on one surface of the heat spreader 6 so that the light emitting diode 5 is positioned near the center of the heat spreader 6. Hereinafter, for convenience of explanation, a portion of the heat spreader 6 that contacts the light emitting unit 2 is referred to as a “contact portion”. The base 8 is on the other surface of the heat spreader 6 and is attached in direct contact with the periphery of the heat spreader 6. Hereinafter, for convenience of explanation, a portion in contact with the base 8 of the heat spreader 6 is referred to as a “diffusion part”. When the heat spreader 6 is viewed in plan, the diffusing portion is disposed so as to surround the contact portion.

  Since it is configured in this way, the heat flowing from the light emitting unit 2 through the contact portion and flowing into the heat spreader 6 is transported to the diffusion portion and flows to the base 8. Therefore, the temperature rise at the contact portion is suppressed. In other words, the contact portion does not reach a high temperature (no hot spot occurs). Therefore, the thermal resistance between the light emitting unit 2 and the heat spreader 6 decreases.

  The heat flowing into the base 8 passes through the heat pipe 9 and is transported to the lower cooling fin row 10 and the upper cooling fin row 11 (hereinafter referred to as “cooling fin row” when both are collectively referred to). Diffused release. At this time, air (cooling air) flows as shown in FIG. That is, the cooling air flows from the “gap” between the base 8 and the lower cooling fin row 10 and enters the cooling fin row, and the cooling air that absorbs heat (that is, rises in temperature) in the cooling fin row has a density. Therefore, the temperature rises in the cooling fin row and is discharged from the upper surface of the upper cooling fin row 11. Thus, the flow of cooling air is generated by the heat released from the cooling fin row.

  Thus, the cooling air flows into the lower part of the lower cooling fin row 10 and rises between the cooling fins 10a while taking heat from the cooling fins 10a. In the meantime, the cooling air between the cooling fins 10a has a temperature boundary. The layer develops. That is, the temperature boundary layer becomes thick. When the temperature boundary layer is thick, heat becomes difficult to be transmitted to the relatively low-temperature cooling air outside the temperature boundary layer, so that the efficiency of heat radiation by the cooling fins 10a is reduced. However, since the arrangement axis Y of the upper cooling fin row 11 is orthogonal to the arrangement axis X of the lower cooling fin row 10, the cooling air that has escaped from the lower cooling fin row 10 (cooling fin 10a) 11, the relatively cool air outside the temperature boundary layer in the lower cooling fin row 10 directly contacts the cooling fins 11 a. Therefore, the cooling fin 11a radiates heat efficiently.

  Thus, the illuminating device 1 can efficiently cool the light emitting diode 5 by efficiently releasing the heat generated by the light emitting diode 5 to the environment. Therefore, the light emitting diode 5 can emit light with high brightness. If the luminance is equivalent to that of the conventional product, the lighting device 1 can be configured to be small and light.

  In addition, said embodiment shows an example of the aspect of this invention, Comprising: The technical scope of this invention is not limited by said embodiment. The present invention can be freely applied, modified or improved within the scope of the technical idea described in the claims.

  For example, the shape and dimensions of the lighting device 1 are examples, and are not limited to those shown in the drawings. The planar shape of the heat spreader 6 may be a polygon other than a rectangle or a circle. The planar shape of the cooling fins 10a and 11a is not limited to a rectangle.

  Moreover, the board | substrate 4 and the base 8 are arbitrary components, Comprising: These may be omitted. For example, the light emitting diode 5 may be directly mounted on the heat spreader 6. Further, the heat pipe 9 may be directly attached to the heat spreader 6.

  Moreover, the structure which is not illustrated by said embodiment may be added to the illuminating device 1. FIG. For example, a housing, a globe, a lens, a reflector, and the like may be provided. Further, a power supply circuit and a control circuit for lighting the light emitting diode 5 may be incorporated.

  In the above embodiment, the heat spreader 6 is illustrated as a specific example of the heat diffusing member, but the heat diffusing member is not limited to the heat spreader 6. That is, it is not limited to the heat diffusion member that utilizes the phase change of the refrigerant sealed in the container. What uses solid heat conduction, for example, a copper or aluminum plate or lump, may be used. However, if the heat spreader 6 is provided as a heat diffusion member, it goes without saying that the cooling capacity of the lighting device 1 is improved as compared with the case where a copper or aluminum plate or lump is provided as the heat diffusion member.

  In the above-described embodiment, the example in which the diffusion portion arranged at the peripheral portion of the heat spreader 6 surrounds the contact portion arranged at the center portion of the heat spreader 6 in a “B” shape is shown. It suffices if it is at the peripheral edge, and its planar shape is not limited to the “B” shape. For example, there may be a part where the diffusion part is not disposed in a part of the peripheral part of the heat spreader 6. That is, the planar shape of the diffusion portion may be a “U” shape or a “D” shape.

  In the above embodiment, the lower cooling fin row 10 and the upper cooling fin row 11 are shown as specific examples of the heat release member, but the shape and shape of the heat release member are not limited to these. For example, only one cooling fin row may be provided, or three or more steps may be provided. Alternatively, three or more stages of cooling fin arrays may be stacked by alternately changing the direction of the arrangement axis.

  For example, as shown in FIG. 8, four sets of heat radiation units 7 are arranged in a “field” shape, and each heat radiation unit 7 is connected to a light emitting unit 2 (not shown in FIG. 8) via a heat spreader 6. The lighting device 1 (not shown in FIG. 8) may be configured by attaching a not-shown in FIG. Further, in each heat radiation unit 7, the cooling fin rows 12 to 15 are stacked in four stages, and the directions of the arrangement axis of the cooling fin rows 12 and 14 and the arrangement axis of the cooling fin rows 13 and 15 are perpendicular to each other. None, adjacent array axes are in a “twisted” relationship.

  In the embodiment of FIG. 1, for example, two pairs of heat pipes 9 that are bent so as to face each other are provided for one cooling fin row 10, that is, a total of four heat pipes 9 are provided. In the embodiment of FIG. 8, a pair of heat pipes 9 bent to face each other with respect to one cooling fin row 12 is provided, that is, a total of two. Similarly, one set of heat pipes 9, that is, a total of two heat pipes 9 are provided for each cooling fin row 13, 14, 15. Thus, the heat radiation unit 7 arranged by stacking the cooling fin rows 12, 13, 14, 15 in four stages includes a total of eight heat pipes 9.

  Moreover, as shown in FIG. 9, you may arrange | position a part of cooling fin row | line | columns 12-15 mutually overlapping. That is, the cooling fins constituting the cooling fin row may be provided with cuts, and other adjacent cooling fin rows may be inserted into the cuts to reduce the height of the heat radiation unit 7.

  The heat pipe 9 described in the embodiment of FIGS. 1 and 8 has an “L” shape as a whole, but in the embodiment of FIG. 9, as shown in FIG. Straight tubular heat pipes 9 are arranged in a vertical direction and a horizontal direction with respect to the base 8. The two heat pipes 9 are connected using a joint member 9b to form a connected heat pipe extending in the vertical direction and the horizontal direction. FIG. 10 is a perspective view showing a state in which the cooling fins are removed from the set of heat radiation units 7 of the lighting device shown in FIG.

  Further, the heat radiating unit 7 shown in FIG. 10 is in thermal contact with the base material 8, the four heat pipes 9 that are in thermal contact with the base material 8 and extend in the vertical direction, and the cooling fin row. The four heat pipes extending in the horizontal direction and four joint members 9b that connect the heat pipes 9 to each other are formed. The number of the heat pipes 9 and the joint members 9b is It is not limited. In short, the base 8 and the cooling fin rows 10 to 15 may be connected in a heat transfer manner through the heat pipe.

  9 and 10, the heat pipe 9 is fixed in a state of being sandwiched by a fixing member 8 c from the outside in a recess 8 b formed on the side wall of the base 8, but at least the heat pipe 9 and the base 8 are As long as it is thermally connected, it may be connected by any method.

  Further, the cooling fin rows 12 to 15 shown in FIGS. 8 and 9 have different areas of adjacent cooling fins. Specifically, the area of the cooling fins 12a adjacent to each other in the cooling fin row 12 of the heat dissipating unit 7 shown in FIGS. 8 and 9 gradually decreases along the arrangement axis of the cooling fins. Thereby, as shown in FIG. 8, when four sets of heat radiation modules 7 are arranged, the entire shape of the lighting device 1 is formed in a columnar shape, and as a result, the lighting device can be reduced in size and weight. . As shown in FIGS. 8 and 9, the other cooling fin rows 13 to 15 are configured similarly to the cooling fin row 12.

  Further, in the above embodiment, the example in which the arrangement axis X of the lower cooling fin row 10 and the arrangement axis Y of the upper cooling fin row 11 are orthogonal to each other is shown, but the arrangement axis X and the arrangement axis Y are “twisted”. Since it is sufficient if there is a relationship, it may intersect at other angles. In short, it is only necessary that the air outside the temperature boundary layer generated while flowing through the lower cooling fin row 10 hits the upper cooling fin row 11.

  In the above embodiment, the light emitting diode 5 is illustrated as a specific example of the light emitting element. However, the technical scope of the present invention is not limited to the lighting device using the light emitting diode as a light source. Another solid light emitting element, for example, an EL (Electroluminescence) element may be used as the light source. An incandescent bulb or a discharge (fluorescent) lamp may be used as the light source. That is, the light emitting element may be an incandescent bulb or a discharge (fluorescent) lamp. Further, a new light source that will appear in the future may be used as the light emitting element.

  In the first place, the present invention aims at enabling high-intensity light emission and reducing the size and weight of an illumination device including a light-emitting diode, etc. The same applies to an illumination device that uses a light bulb or a discharge (fluorescent) lamp as a light source. Therefore, it is meaningful to apply the present invention to such a lighting device.

  Further, in the description of the above embodiment, no particular mention is made of means for connecting the constituent elements, but various known means such as caulking, welding, brazing, and screwing can be used. Further, for joining the heat pipe and the fin, for example, means such as press fitting, adhesion, soldering, welding, and welding can be used.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Light emitting unit 3 Cooling unit 4 Board | substrate 5 Light emitting diode 6 Heat spreader 7 Heat dissipation unit 8 Base | substrate 9 Heat pipe 9b Joint member 10 Lower cooling fin row 11 Upper cooling fin row 12-15 Cooling fin row

Claims (9)

A light emitting element;
A heat diffusion member that thermally contacts the light emitting element and diffuses heat transferred from the light emitting element;
A heat transport member that is in heat transfer contact with the heat diffusing member and transports heat from the one to the other;
A heat release member that is in heat transfer contact with the other of the heat transport members and releases heat transferred from the heat transport member to the environment ;
The heat releasing member is disposed with a gap with respect to the heat diffusing member, and air that has flowed into the lower portion of the heat releasing member through the gap passes through the heat releasing member to pass through the heat. A plurality of cooling fin rows in which a plurality of cooling fins are arranged at intervals so as to flow out above the discharge member,
The plurality of cooling fin rows are stacked one above the other, and when the plurality of cooling fin rows are viewed from above, the cooling fin row of one of the two adjacent cooling fin rows is the other. The illuminating device arrange | positioned so that it may cross | intersect the cooling fin of a cooling fin row | line | column . A light emitting element;
  A heat diffusion member that thermally contacts the light emitting element and diffuses heat transferred from the light emitting element;
  A heat transport member that is in heat transfer contact with the heat diffusing member and transports heat from the one to the other;
  A heat release member that is in heat transfer contact with the other of the heat transport members and releases heat transferred from the heat transport member to the environment;
  The heat releasing member is disposed with a gap with respect to the heat diffusing member, and air that has flowed into the lower portion of the heat releasing member through the gap passes through the heat releasing member to pass through the heat. A plurality of cooling fin rows in which a plurality of cooling fins are arranged at intervals so as to flow out above the discharge member,
  The cooling fin comprises a cutout in at least one side edge;
  The notches of the cooling fins of one cooling fin row and the notches of the cooling fins of the other cooling fin row of the adjacent cooling fin rows fit with each other.
  Lighting device. The thermal diffusion member has a central portion facing the light emitting element, and a peripheral portion surrounding a part or all of the central portion,
In the heat transport member the periphery, the illumination device according to claim 1 or claim 2, characterized in that heat conductive contact with said heat diffusion member. The plurality of cooling fin rows are arranged so that the arrangement axis of one cooling fin row of two adjacent cooling fin rows is in a “twisted” relationship with the arrangement axis of the other cooling fin row. The lighting device according to any one of claims 1 to 3, wherein the lighting device is characterized in that: The lighting device according to any one of claims 1 to 3, wherein the arrangement axes of the two adjacent cooling fin rows are arranged to be orthogonal to each other. The lighting device according to claim 1 , wherein the adjacent cooling fins have different areas. The lighting device according to any one of claims 1 to 6 , wherein the light emitting element is mounted on a substrate, and the substrate is in surface contact with the heat diffusing member. Provided with a substrate in surface contact with the thermal diffusion member, one end of the heat transport member illumination device according to any one of claims 1 to claim 7, characterized in that it is coupled to the substrate . A lighting device comprising a combination of a plurality of lighting devices according to any one of claims 1 to 8 .

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