JP2008130232A - Vehicular led lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular LED lamp capable of securing a predetermined quantity of irradiation light by suppressing temperature rise of an LED light source by enhancing heat radiation capability against self-heating of the LED light source, and thereby reducing deterioration of emission efficiency of the LED light source, in a vehicular LED lamp using LEDs for a light source. <P>SOLUTION: In a lamp unit 5 supported in a lamp chamber formed with a front lens and a housing, a mount plate 7 with a mounting board of the LED light source 6 mounted thereon, a reflector 8 connected to the mount plate 7, and a heat sink 12 similarly fixed to the mount plate 7 are each formed of a material having high thermal conductivity, and the reflector 8 is provided with a radiation fin 15 formed of a material having high thermal conductivity. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle LED lamp using an LED as a light source.

  The LED has a characteristic that the light emission efficiency decreases as the temperature rises. Possible causes of LED temperature rise include self-heating during lighting and exposure to a high temperature environment.

  On the other hand, LEDs generally have advantages such as small size, low power consumption, and long life compared to various lamps. Conventionally, LEDs have been used to make high-mount stop lamps, stop-and-tail lamps, turn signals, etc. In recent years, a vehicle headlamp using an LED as a light source has been proposed.

  In general, a vehicular lamp has a lamp chamber formed by a front lens and a housing, and an LED serving as a light source is supported in the lamp chamber. When the LED is turned on, the temperature of the LED itself rises due to the self-heating of the LED, and as a result, the light emission efficiency of the LED decreases and the amount of irradiation light of the lamp decreases, and in the extreme case due to the deterioration of the light distribution performance There is also a possibility that the light distribution standard required for the lamp will not be satisfied.

  Therefore, proposals have been made for vehicle headlamps that prevent the occurrence of the above problems. As shown in FIG. 13, the vehicle head includes a transparent cover 51, a lamp body 52, a support bracket 56 in which a vertical panel portion 53, a unit support portion 54 and a heat sink portion 55 are integrated, and a socket cover 57. A lamp chamber 58 of the lamp 50 is formed, and the vertical panel portion 53 and the unit support portion 54 of the support bracket 56 are located in the lamp chamber 58 of the headlamp 50, and the heat sink portion 55 is a lamp chamber 58 of the headlamp 50. It extends outside.

  A semiconductor light emitting element 59, a reflector 60, and a light control member 61 are fixed to the unit support portion 54 of the support bracket 56 located in the lamp chamber 58 of the headlamp 50. The light control member 61 includes a projection lens 62. I support it.

In the vehicle headlamp 50 having the above-described configuration using the semiconductor light emitting element 59 as a light source, self-heating when the semiconductor light emitting element 59 is turned on is a unit support portion 54 of a support bracket 56 formed of a material that is a good conductor of heat. Then, the heat is transferred from the heat sink portion 55 to the heat sink portion 55, and is dissipated outside the lamp chamber 58 by the heat sink portion 55. Thereby, the temperature rise of the semiconductor light emitting element 59 itself when the semiconductor light emitting element 59 is turned on is suppressed (see, for example, Patent Document 1).
JP-A-2005-141917

  In the conventional vehicle headlamp 50, most of the heat generated in the semiconductor light emitting device 59 is conducted from the unit support portion 54 of the support bracket 56 on which the semiconductor light emitting device 59 is mounted to the heat sink portion 55 to be heat sink. The light is dissipated outside the lamp chamber 58 at the section 55.

  By the way, the heat sink portion 55 has a higher heat dissipation efficiency and a better heat dissipation effect as the heat dissipation area of the entire surface of the heat sink portion 55 in contact with the outside air (air) is larger. In other words, the size of the heat sink portion 55 is related to the heat dissipation efficiency. However, when the heat sink portion 55 is increased, the entire vehicle headlamp 50 is increased and the weight is also increased. For this reason, it is conceivable that the degree of freedom in designing the dimensions of the heat sink portion 50 cannot be ensured due to the mounting space and weight restrictions of the vehicle headlamp 50, and sufficient heat dissipation efficiency cannot be obtained.

  Therefore, the present invention was devised in view of the above problems, and the object of the present invention is to increase the heat dissipation of self-heating of the LED while maintaining the small size and light weight in the vehicle LED lamp using the LED as a light source. Accordingly, an object of the present invention is to provide a vehicular LED lamp that suppresses the temperature rise of the LED, thereby suppressing a decrease in the light emission efficiency of the LED and ensuring a predetermined amount of irradiation light.

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present invention is characterized in that at least an LED light source and light emitted from the LED light source are provided in a lamp chamber formed by at least a front lens and a housing. A vehicle LED lamp comprising: a reflector having a light reflecting surface that reflects in the direction of the front lens; and a lamp unit including a heat radiating member that radiates heat generated by the LED light source, wherein the reflector is made of Al, It is made of any one of Al alloy, Cu, and Cu alloy.

  Moreover, the invention described in claim 2 of the present invention is characterized in that, in claim 1, either one of a heat radiating fin and a heat radiating pin is provided on the reflector.

  Further, in the invention described in claim 3 of the present invention, in any one of claim 1 or 2, the reflector and the heat radiating member are either a thermal conductive sheet or a thermal conductive compound oil. -It is characterized by being connected via an interface material).

  Further, according to a fourth aspect of the present invention, in any one of the second or third aspect, any one of the radiating fin and the radiating pin is joined to the reflector by brazing or caulking. It is characterized by this.

  The invention described in claim 5 of the present invention is characterized in that, in any one of claims 1 to 4, the reflector and the heat radiating member are connected by a heat pipe.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a vent hole penetrating the reflector is formed in at least a part of the optically non-acting portion of the reflector. It is characterized by being provided.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, at least a part of a surface of the reflector opposite to the light reflecting surface is subjected to alumite treatment. It is characterized by being.

  According to an eighth aspect of the present invention, in any one of the first to sixth aspects, a ceramic coating is applied to at least a part of a surface of the reflector opposite to the light reflecting surface. It is characterized by being.

  The invention described in claim 9 of the present invention is the lamp unit according to any one of claims 1 to 8, wherein the lamp unit is a TIM (thermal interface) of any one of a heat conductive sheet and a heat conductive compound oil. A material) is attached to a bracket made of any metal of Al, Al alloy, Cu, and Cu alloy, and the lamp unit is supported in the lamp chamber via the bracket. It is what.

  The invention described in claim 10 of the present invention is characterized in that, in claim 9, the bracket has any one of a radiation fin and a radiation pin.

  The invention described in claim 11 of the present invention is characterized in that, in any one of claims 9 and 10, at least a part of the surface of the bracket is subjected to alumite treatment. is there.

  The invention described in claim 12 of the present invention is characterized in that, in any one of claims 9 and 10, ceramic coating is applied to at least a part of the surface of the bracket. is there.

  The invention described in claim 13 of the present invention is characterized in that, in any one of claims 9 to 12, the lamp unit and the bracket are connected by a heat pipe.

  According to a fourteenth aspect of the present invention, in any one of the ninth to thirteenth aspects, the lamp unit is rotatably supported inside the lamp chamber via the bracket. It is characterized by this.

  In the vehicular LED lamp according to the present invention, most of the constituent members of the lamp unit housed in the lamp chamber are formed of a material having high thermal conductivity, and the constituent members are further provided with radiating fins or radiating pins.

  For this reason, the heat radiation area of the lamp unit as a whole is increased, and the heat dissipation of the lamp unit is improved. As a result, since the temperature rise of the LED light source is suppressed, a decrease in the light emission efficiency of the LED light source is reduced, and a predetermined irradiation light amount can be secured.

  In addition, since a part of the heat radiation that the heat sink conventionally carried can be shared with other structural members other than the heat sink, the lamp unit even if the heat sink is made smaller than the conventional heat sink and the heat radiation from the heat sink is reduced. As a whole, it is possible to ensure sufficient heat dissipation.

  Therefore, it is possible to reduce the size of the vehicle LED lamp by reducing the size of the heat sink, and particularly to reduce the depth in the vehicle front-rear direction when mounted on the vehicle, and to reduce the weight of the vehicle LED lamp. Can do.

  Therefore, it is possible to reduce the size of the heat sink while ensuring the heat dissipation efficiency of the entire lamp, and to ensure the degree of design freedom while maintaining the heat dissipation performance even if there is a restriction on the installation space of the lamp Is possible.

  A vehicle that suppresses a temperature rise of the LED by increasing the heat dissipation of the LED's self-heating while maintaining a small size and light weight, thereby suppressing a decrease in the light emission efficiency of the LED and ensuring a predetermined irradiation light amount. The purpose of realizing an LED lamp for use is to form many of the constituent members of the lamp unit housed in the lamp chamber with a material having high thermal conductivity, and to further provide heat radiating fins or heat radiating pins to the constituent members. Realized.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 12 (the same parts are given the same reference numerals). In addition, since the Example described below is a suitable specific example of this invention, various technically preferable restrictions are attached | subjected, The range of this invention limits this invention especially in the following description. As long as there is no description of that, it is not restricted to these Examples.

  FIG. 1 is a cross-sectional view of Example 1 according to the vehicle LED lamp of the present invention. In the vehicular LED lamp 1, a lamp chamber 4 is formed by a front lens 2 and a housing 3, and a lamp unit 5 is supported in the lamp chamber 4.

  The lamp unit 5 includes an optical system and a heat dissipation system. The optical system is connected to the LED light source 6, the mount plate 7 on which the mounting substrate of the LED light source 6 is placed, the reflector 8 connected to the mount plate 7, and the reflector 8. The lens holder 9, the shield 10 extending upward from the inner bottom surface of the lens holder 9, and the projection lens 11 supported by the lens holder 9 form a projector lamp.

  On the other hand, the heat dissipation system includes a mount plate 7 on which a mounting substrate of the LED light source 6 is placed, a heat sink 12 fixed to the mount plate 7, and a reflector connected to a heat dissipation member 13 in which the mount plate 7 and the heat sink 12 are integrated. 8 is configured.

  Note that each of the mount plate 7, the heat sink 12, and the reflector 8 is made of any one of Al, Al alloy, Cu, and Cu alloy.

  Next, light in the optical system will be described. In the optical system of the lamp unit 5 of this embodiment, as shown in FIG. 2, when the LED light source 6 is turned on and emits light, the light from the LED light source 6 toward the light reflecting surface 14 of the reflector 8 is reflected by the light reflecting surface 14. Then, the optical path is blocked by the shield 10 in a part toward the front projection lens 11. On the other hand, of the light reflected by the light reflecting surface 14 of the reflector 8, the light that is not blocked by the shield 10 is guided through the lens holder 9 to the projection lens 11, and a desired light distribution is achieved by the projection lens 11. To the front of the vehicle LED lamp 1 via the front lens 2.

  As for heat in the heat dissipation system, as shown in FIG. 3, when the LED light source 6 is turned on, the LED light source 6 emits light and also generates heat. Therefore, the heat (self-heating) generated by the LED light source 6 moves to a substrate (not shown) on which the LED light source 6 is mounted, and is conducted through the LED light source 6 mounting substrate to mount the substrate 7 on which the substrate is placed. Move to.

  A part of the heat transferred to the mount plate 7 is transferred to the heat sink 12 which is conducted through the mount plate 7 and fixed to the mount plate 7. Similarly, a part of the heat is transferred to the mount plate 7 and the heat sink 12. It moves to the reflector 8 connected to the heat radiating member 13 through a TIM (thermal interface material) such as a heat conductive sheet or a heat conductive compound oil.

  The heat transferred to the heat sink 12 and conducted through the heat sink 12 to reach the surface of the heat sink 12 is transferred by heat to the air in the vicinity of the surface of the heat sink 12, and is dissipated outside the heat sink 12 using air as a medium.

  Further, the heat transferred to the reflector 8 and conducted inside the reflector 8 to reach the surface of the reflector 8 is transferred to the air in the vicinity of the surface and transferred, and is dissipated out of the reflector 8 using air as a medium.

  As a result, the heat generated when the LED light source 6 is turned on is dissipated by many members (the LED light source 6, the mount plate 7, the heat sink 12, and the reflector 8) constituting the lamp unit. High heat dissipation.

  4 and 5 are sectional views of the lamp unit according to the second embodiment. FIG. 4 shows a state in which heat dissipating fins 15 made of any one of Al, Al alloy, Cu, and Cu alloy are provided on the side opposite to the light reflecting surface 14 of the reflector 8 of the lamp unit 5 of the first embodiment. Similarly, FIG. 5 similarly shows a heat radiation pin 16 made of any one of Al, Al alloy, Cu, and Cu alloy on the side opposite to the light reflecting surface 14 of the reflector 8 of the lamp unit 5 of the first embodiment. It is provided.

  Note that both the radiation fins 15 and the radiation pins 16 are joined to the reflector 8 by brazing or caulking, respectively. In this case, the caulking of the radiating fin 15 has a structure in which a concave slit is provided on the opposite side of the light reflecting surface 14 of the reflector 8 and the radiating fin 15 made of a plate material is press-fitted into the slit to be fitted. The pin 16 has a structure in which a concave hole is formed on the opposite side of the light reflecting surface 14 of the reflector 8 and a heat radiating pin 16 made of a bar material is press-fitted into the hole.

  In this embodiment, a part of the heat generated in the LED light source 6 and moved to the reflector 8 is moved to the radiating fins 15 or the radiating pins 16, and is conducted through the radiating fins 15 or the radiating pins 16. The heat that has reached is transferred to the air in the vicinity of the surface and moved, and is dissipated out of the radiation fins 15 or the radiation pins 16 using the air as a medium.

  As a result, since the number of members related to heat dissipation (radiation fins or pins) is increased in this example compared to Example 1, the heat dissipation is improved by that amount, and the effect of suppressing the temperature rise of the LED light source is also achieved. It is growing.

  FIG. 6 is a cross-sectional view of the lamp unit according to the third embodiment. This embodiment has a structure in which a heat radiating fin 15 and a heat radiating member 13 joined to the reflector 8 of the lamp unit 5 of the second embodiment are connected by a heat pipe 17.

  In this case, there are two heat conduction paths for the heat generated in the LED light source 6 to move to the radiation fins 15, one of which is the radiation fins from the LED light source 6 through the heat radiation member 13 and the reflector 8. The other is a path from the LED light source 6 to the heat radiation fin 15 through the heat radiation member 13 and the heat pipe 17. In particular, the heat conduction path from the heat pipe 17 to the heat radiation fin 15 has a high heat transfer efficiency because the heat conductivity of the heat pipe 17 is as high as several hundred times that of copper of the same shape and size. The heat dissipation from the radiation fins 15 is greatly promoted.

  The other connection destination of the heat pipe 17, one of which is connected to the heat radiating member 13, may be the reflector 8 instead of the heat radiating fin 15. In this case, the heat generated by the LED light source 6 is efficiently conducted to the reflector 8, and the dissipation of heat from the reflector 8 is promoted. Further, if the reflector 8 connected to the heat pipe 17 is provided with a heat radiating fin or a heat radiating pin, the heat conducted by the heat pipe 17 is dissipated to the outside by any of the reflector 8 and the heat radiating fin or the heat radiating pin. Thus, a high heat dissipation effect can be obtained.

  FIG. 7 is a sectional view of a lamp unit according to the fourth embodiment. In this embodiment, the reflector 8 is provided with a vent hole 18 penetrating the reflector 8. The vent hole 18 plays a role of releasing heat to the outer side 20 of the reflector 8 so that the heat dissipated from the reflector 8 to the inner side 19 (the light reflecting surface 14 side) of the reflector 8 does not reach the inner side 19 of the reflector 8. ing.

  The vent hole 18 is provided in a portion of the reflector 8 that does not act optically, and consideration is given so as not to affect the optical system. And by providing this air hole 18, the heat dissipation effect from the light reflecting surface side of the reflector 8 can be expected.

  In addition, the structure which provides the vent hole 18 in the said reflector 8 is applicable with respect to all the Examples concerning this invention.

  FIG. 8 is a cross-sectional view of Example 5 according to the vehicle LED lamp of the present invention. In addition, the Example shown below including a present Example becomes the structure by which the lamp unit 5 concerning the said Examples 1-4 was attached to the bracket 21. FIG. Details will be described below.

  The bracket 21 is made of any one of Al, Al alloy, Cu, and Cu alloy, and has a substantially U-shape. Each of the pair of opposing surfaces of the U-shape extends outward from the outer surface. A shaft portion 22 is provided. The two shaft portions 22 are located at positions sharing the respective central axes Y.

  The lamp unit 5 is attached to the bracket 21 via a TIM such as a heat conductive sheet or heat conductive compound oil, and the optical axis X of the lamp unit 5 is a common central axis Y of the two shaft portions 22 of the bracket 21. It faces in a direction substantially perpendicular to.

  Therefore, the lamp unit 5 attached to the bracket is housed in the lamp chamber 4 via the bracket 21 and the shaft portion 22 of the bracket 21 is rotated, whereby the common central axis Y of the shaft portion 22 is set as the rotation center. Aiming is performed in a direction perpendicular to the common central axis Y. In addition, if the shaft part 22 is supported so as to be rotatable and tiltable, aiming in not only one direction but also in multiple directions is possible.

  Of the heat generated by the LED light source 6 when the LED light source 6 is turned on, the heat conducted to the heat radiating member 13 in which the mount plate 7 and the heat sink 12 are integrated is transmitted through a TIM such as a heat conductive sheet or heat conductive compound oil. To the connected bracket 21.

  The heat transferred to the bracket 21 is conducted through the bracket 21 to reach the surface of the bracket 21, is transferred by heat transfer to the air near the surface, and is dissipated out of the bracket 21 using air as a medium.

  As a result, the heat generated when the LED light source 6 is turned on is dissipated by many members (the LED light source 6, the mount plate 7, the heat sink 12, the reflector 8, and the bracket 21) constituting the lamp unit. 5 becomes a thing with high heat dissipation.

  9 and 10 are sectional views according to the sixth embodiment. FIG. 9 is a view in which a radiation fin 15 made of any one of Al, Al alloy, Cu, and Cu alloy is provided on the side opposite to the surface of the bracket 21 of Example 5 where the lamp unit 5 is attached. Similarly, in FIG. 10, the heat radiation pin 16 made of any one of Al, Al alloy, Cu, and Cu alloy is provided on the opposite side of the surface of the bracket 21 of Example 5 to which the lamp unit 5 is attached. It is provided.

  Note that both the radiation fins 15 and the radiation pins 16 are joined to the reflector 8 by brazing or caulking, respectively. In this case, the caulking of the radiating fin 15 has a structure in which a concave slit is provided on the opposite side of the surface of the bracket 21 to which the lamp unit 5 is attached, and the radiating fin 15 made of a plate material is press-fitted into the slit. The radiating pin 16 has a structure in which a concave hole is provided on the opposite side of the surface of the bracket 21 to which the lamp unit 5 is attached, and the radiating pin 16 made of a bar is press-fitted into the hole. It has become.

  In the present embodiment, a part of the heat generated in the LED light source 6 and moved to the bracket 21 is moved to the radiation fins 15 or the radiation pins 16, and is conducted through the radiation fins 15 or the radiation pins 16. The heat that has reached is transferred to the air in the vicinity of the surface and moved, and is dissipated out of the radiation fins 15 or the radiation pins 16 using the air as a medium.

  As a result, since the number of members (heat radiating fins or heat radiating pins) related to heat radiation is increased in this embodiment compared to the fifth embodiment, the heat radiation performance is improved by that amount, and the effect of suppressing the temperature rise of the LED light source is also achieved. It is growing.

  FIG. 11 is a sectional view of a lamp unit according to the seventh embodiment. This embodiment has a structure in which the lamp unit 5 and the bracket 21 of Embodiment 6 are connected by a heat pipe 17.

  Then, the heat generated in the LED light source 6 and moved to the bracket 21 through the heat pipe 17 is conducted through the bracket 21 and moves to the radiation fin 15 or the radiation pin 16 (not shown), and the radiation fin 15 or the radiation pin. The heat that has been conducted through 16 and reaches the respective surfaces is transferred to the air in the vicinity of the surface and moved, and is dissipated out of the radiating fins 15 or the radiating pins 16 using air as a medium.

  In this case, as described above, the heat conductivity of the heat pipe 17 is as high as several hundred times that of copper having the same shape and size, so that the heat transport efficiency is high, and the heat dissipation from the radiating fins 15 is remarkably high. It is possible to obtain a high heat dissipation effect.

  In the first to seventh embodiments, the heat dissipation of the reflector can be enhanced by applying any one of alumite treatment and ceramic coating to the surface opposite to the light reflecting surface of the reflector constituting the lamp unit. For example, when the reflector material is aluminum, the emissivity of the substrate is about 0.4 to 0.6, and on the mirror surface is about 0.05 to 0.01, but by applying alumite treatment or ceramic coating The emissivity can be improved to about 0.9 to 0.98. This value is an emissivity that is close to that of black body radiation, and therefore the temperature of the LED light source can be lowered by about 5 ° C. to 10 ° C.

  Similarly, in the said Examples 5-7, the heat dissipation of a bracket can be improved by giving the surface of a bracket any one of alumite processing and ceramic coating.

  Next, the result of having verified the relationship between the structure of the LED lamp for vehicles of this invention and the thermal radiation effect by thermal simulation is shown below.

As a simulation condition, it is assumed that the volume of the lamp chamber formed by the front lens and the housing is 0.01 m ² and that five lamp units including an LED light source serving as a 9 W heat source are accommodated in the lamp chamber. Then, as shown in FIG. 12, the ambient temperature of the vehicular LED lamp was set separately for the front lens side and the housing side.

Table 1 shows the simulation results.

  From the above simulation results, it can be seen that the heat sink reduces the Tj (junction temperature) of the LED by 115 ° C. to 130 ° C., and the temperature of the lamp as a whole is reduced by 130 ° C. to 140 ° C. In other words, the heat sink located below the LED light source greatly reduces the Tj of the LED, and at the same time, the lamp unit component is made of a material having high thermal conductivity such as Al, Al alloy, Cu, Cu alloy, etc. It was verified that a lower temperature could be expected.

  As described above, the vehicular LED lamp according to the present invention includes the mount plate 7 on which the LED light source mounting substrate is mounted, the reflector 8 connected to the mount plate 7, and the mount plate 7. It is composed of a fixed heat sink 12 and a bracket 21 connected to a heat radiating member 13 in which the mount plate 7 and the heat sink 12 are integrated, each of which has a thermal conductivity of Al, Al alloy, Cu, Cu alloy or the like. Made of high material.

  Furthermore, each of the reflector 8 and the bracket 21 is provided with a radiation fin or a radiation pin formed of a material having high thermal conductivity such as Al, Al alloy, Cu, Cu alloy or the like.

  Therefore, the heat generated from the LED light source when the LED light source is turned on is dissipated to the outside through the respective constituent members constituting the heat dissipation system. As a result, the heat dissipation of the lamp unit having the LED light source becomes extremely excellent, and the decrease in the luminous efficiency of the LED light source can be reduced by suppressing the temperature rise of the LED light source, and a predetermined irradiation light amount can be secured. It becomes.

  In addition, since a part of the heat radiation that the heat sink conventionally carried can be shared with other structural members other than the heat sink, the lamp unit even if the heat sink is made smaller than the conventional heat sink and the heat radiation from the heat sink is reduced. As a whole, it is possible to ensure sufficient heat dissipation.

  Therefore, it is possible to reduce the size of the vehicle LED lamp by reducing the size of the heat sink, and to reduce the weight of the vehicle LED lamp.

  Therefore, it is possible to reduce the size and weight while ensuring the heat radiation efficiency of the entire lamp, and it is possible to ensure a degree of design freedom even if restrictions are imposed on the installation space and weight of the lamp.

  The LED light source may be an LED bare chip (LED chip) or an LED device in which the LED chip is mounted on a package.

It is sectional drawing of Example 1 concerning this invention. It is sectional drawing of the lamp unit of Example 1 concerning this invention. Similarly, it is sectional drawing of the lamp unit of Example 1 concerning this invention. It is sectional drawing of Example 2 concerning this invention. Similarly, it is sectional drawing of Example 2 concerning this invention. It is sectional drawing of the lamp unit of Example 3 concerning this invention. It is sectional drawing of Example 4 concerning this invention. It is sectional drawing of Example 5 concerning this invention. It is sectional drawing of the lamp unit of Example 6 concerning this invention. Similarly, it is sectional drawing of the lamp unit of Example 6 concerning this invention. Similarly, it is sectional drawing of the lamp unit of Example 7 concerning this invention. It is explanatory drawing showing the conditions of the thermal simulation concerning this invention. It is sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle LED lamp 2 Front lens 3 Housing 4 Lamp chamber 5 Lamp unit 6 LED light source 7 Mount plate 8 Reflector 9 Lens holder 10 Shield 11 Projection lens 12 Heat sink 13 Heat radiating member 14 Light reflecting surface 15 Heat radiating fin 16 Heat radiating pin 17 Heat Pipe 18 Vent 19 Inside 20 Outside 21 Bracket 22 Shaft

Claims (14)

  At least inside the lamp chamber formed by the front lens and the housing, at least an LED light source, a reflector having a light reflecting surface for reflecting light emitted from the LED light source toward the front lens, and the LED light source An LED lamp for a vehicle, in which a lamp unit including a heat dissipation member that dissipates heat is supported, wherein the reflector is made of any one of Al, Al alloy, Cu, and Cu alloy. LED lighting for vehicles.   The vehicle LED lamp according to claim 1, wherein either one of a heat radiating fin and a heat radiating pin is provided on the reflector.   The said reflector and the said heat radiating member are connected via either TIM (thermal interface material) among a heat conductive sheet and a heat conductive compound oil, The any one of Claim 1 or 2 characterized by the above-mentioned. The LED lamp for vehicles as described in.   4. The vehicular LED lamp according to claim 2, wherein one of the heat radiating fin and the heat radiating pin is joined to the reflector by brazing or caulking. 5.   5. The vehicular LED lamp according to claim 1, wherein the reflector and the heat dissipation member are connected by a heat pipe.   6. The vehicular LED lamp according to claim 1, wherein a vent hole penetrating the reflector is provided in at least a part of a portion of the reflector that does not act optically. 6.   The vehicular LED lamp according to any one of claims 1 to 6, wherein an alumite treatment is applied to at least a part of a surface of the reflector opposite to the light reflecting surface.   The vehicular LED lamp according to any one of claims 1 to 6, wherein a ceramic coating is applied to at least a part of a surface of the reflector opposite to the light reflecting surface.   The lamp unit is attached to a bracket made of any metal of Al, Al alloy, Cu, and Cu alloy via TIM (thermal interface material) of any one of a heat conductive sheet and a heat conductive compound oil. The vehicular LED lamp according to any one of claims 1 to 8, wherein the vehicular LED lamp is attached and the lamp unit is supported in the lamp chamber via the bracket.   The vehicle LED lamp according to claim 9, wherein the bracket includes any one of a heat radiating fin and a heat radiating pin.   11. The vehicular LED lamp according to claim 9, wherein an alumite treatment is applied to at least a part of a surface of the bracket.   11. The vehicle LED lamp according to claim 9, wherein ceramic coating is applied to at least a part of a surface of the bracket.   The vehicular LED lamp according to any one of claims 9 to 12, wherein the lamp unit and the bracket are connected by a heat pipe.   14. The vehicular LED lamp according to claim 9, wherein the lamp unit is rotatably supported inside the lamp chamber via the bracket.

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