KR101880879B1 - Flexible LED module for car - Google Patents

Abstract

The present invention relates to an LED module used in vehicles, which is easily applied to various non-planar configurations. A flexible LED module for a vehicle includes: a plurality of LED packages having an LED chip, two or more leads extending from the LED chip corresponding to respective polarities; and a plurality of connection frames provided between the LED packages to electrically connect and support two adjacent LED packages. Each of the connection frames includes: a first connection part formed with a first cutout part into which a first polarity lead of one of the adjacent LED packages is inserted and fixed; a second connection part formed with a second cutout part into which a second polarity lead of a remaining LED package is inserted and fixed; and a connection part provided between the first connection part and the second connection part to electrically connect and support the first connection part and the second connection part, wherein the first and second connection parts are provided with a heat dissipation sheet. The heat dissipation sheet includes: a graphite sheet having a thickness of 0.05 mm to 0.7 mm; and a thermally-conductive adhesive layer formed on one or both surfaces of the graphite sheet, containing carbon nanotubes having an average diameter of 5 to 7 nm, and having a thickness of 0.1 mm to 0.3 mm.

Description

[0001] The present invention relates to a flexible LED module for a car,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a flexible LED module for a vehicle, and more particularly, to a flexible LED module for a vehicle which can realize various non-planar structures such as curves and is easy to replace an LED package.

A light emitting diode (LED) is a junction between a p-type and an n-type semiconductor, and when the voltage is applied, it is a type of photoelectric device that emits energy corresponding to a band gap of a semiconductor by combining electrons and holes . Since the mid-1990s, blue LEDs have been developed, enabling full-color displays.

The light emitting diode (LED) light source is a light source with a small heat loss, which is very small in power consumption compared to an incandescent lamp, and can exhibit energy saving, excellent in life and maintenance, and is environmentally friendly. ) Is widely used for general lighting, building decoration, mood lighting, traffic signal, indoor and outdoor signs, guidance lights, warning lights, light sources for various security devices, and light sources for sterilization or disinfection. Particularly, in recent years, there is a tendency to use a high-intensity LED lamp having a long service life and excellent impact resistance in indoor and outdoor lighting of automobiles.

The lamp attached to the front of the vehicle includes a signal lamp that operates in the left and right flickering operation and a daytime running lamp that lights in the daytime in addition to the night light, and the lamp attached to the rear of the vehicle is a stop lamp , A signal lamp that operates when the left and right flashing operation is performed, and a backup lamp that operates when the reverse gear is operated. Currently, these lamps are implemented as LEDs. However, it is often the case that each of these lamps is manufactured as a separate module.

In the case of an automotive LED lamp, it is necessary to implement various non-planar shapes such as a curved shape as necessary. In general, a printed circuit board is generally used for mounting a semiconductor device such as an LED. Since a printed circuit board is made of a material having low ductility, such as epoxy or bakelite resin, which is restricted by bending, It is prone to breakage. Therefore, when the LED is mounted on a printed circuit board, it is impossible to implement the LED in the same shape as the curve described above. In addition, soldering is mostly used in the case of mounting an LED, which is disadvantageous in that it may have a detrimental effect on people or the environment when manufacturing or disposing such a substrate.

For this purpose, conventionally, two buses corresponding to the polarities of the LEDs are provided, and each lead of the LEDs is melted by using a laser device on each bus line to join them together, (US Pat. No. 5,404,282), or a method of forming a hook on a lead or a bus bar and fixing the other by forcibly inserting it (Korean Patent Registration No. 0558454) is used by a clinching operation .

However, in case of the first method, it is very difficult to separate the combined LEDs again. Therefore, if some LEDs are broken, the entire LED module must be replaced, and the cost of the module configuration is increased because the laser device is expensive. In case of the second method, since the clining operation can not be reworked, there is a disadvantage that other methods such as the laser welding described above must be used when replacing some LEDs. In the case of the third method, since the hook is formed on the LED side lead, it is generally not applicable. In addition, when the coupling is engaged, the other one must be forcedly pushed into the hook, and the capacity of the hook is proportional to the clamping force of the LED. Inevitably, the capacity of the hook is inevitably increased. In this case, It can not be accommodated by bending. On the contrary, when the housing is low, it is difficult to securely fix the LED after the reception.

It is impossible to form various non-planar structures because it is possible to bend in only one direction by supporting the two elements in parallel in the above-described respective methods.

An object of the present invention is to provide an automotive flexible LED module which is flexibly implemented and is easy to apply to various non-planar shapes.

Another object of the present invention is to provide a flexible LED module for a vehicle that can flex in one direction or in a multi-sided direction, and can realize various non-planar structures such as curved lines when sequentially fixing a plurality of LED packages.

Another object of the present invention is to provide an automotive flexible LED module that can be omitted from soldering or the like and is easy to replace when a damaged LED is replaced and is environmentally friendly.

According to an aspect of the present invention, there is provided an LED module for use in an automobile, the LED module including: an LED chip; a plurality of LED packages having two or more leads extended from the LED chip in correspondence with respective polarities; ; And a plurality of connection frames provided between the LED packages to electrically connect and support two neighboring LED packages, wherein each of the connection frames includes a first polarity lead of any one of the neighboring LED packages, A first connecting portion formed with a first incision portion to be fixed; A second connection portion having a second cutout portion in which the second polarity lead of the other LED package is inserted and fixed; And a connection portion provided between the first connection portion and the second connection portion to electrically connect and support the first and second connection portions, wherein the first and second connection portions are provided with a heat radiation sheet, and the heat radiation sheet has a thickness of 0.05 mm to 0.7 mm Graphite sheet; And a thermally conductive adhesive layer formed on one side or both sides of the graphite sheet and containing carbon nanotubes having an average diameter of 5 to 7 nm and having a thickness of 0.1 mm to 0.3 mm, A carbon nanotube dispersion liquid in which nanotubes are mixed with a solvent and dispersed by ultrasonic waves, and an acrylate polymer, and the solvent is a flexible LED module for automobiles such as isopropyl alcohol, toluene, ethyl acetate, or methyl ethyl ketone do.

When the LED package is fixed on the upper portion of each of the connecting portions, the respective leads push the respective cut-out portions and then are bent together with the cut-out portions and can be pressed and fixed to the lower portions of the respective connecting portions.

Wherein the connection part comprises first and second wires respectively extended from the first and second connection parts and a spring part connecting the first and second wires, And can be fastened with the spring by screwing.

Wherein a side surface of each of the first and second connecting portions is provided with an annular fixing portion having elasticity and each of the side surfaces of the first and second connecting portions is provided with a recessed portion inwardly recessed in a portion corresponding to the fixing portion, The heat sink is fixed to the base, and the heat sink includes a support plate made of aluminum, a plurality of radiating fins provided in a wave form on the support plate, and an L-shaped protrusion protruding from one end of the support plate, It can be made of fixed hooks.

Wherein the heat sink is inserted and fixed by pulling the fixing portion so that the hook portion of the heat sink is seated in the groove portion and fixed by the fixing portion, and the hook portion is vertically extended from the supporting plate, And a horizontal portion extending parallel to the support plate in the vertical portion and in contact with a lower end of the first and second connection portions. The upper surface of the horizontal portion is in contact with the lower surface of the first and second connection portions A pressure sensitive adhesive may be provided.

The pressure-sensitive adhesive is composed of a mixture of an acrylic copolymer, a crosslinking agent and inorganic particles, and the acrylic copolymer has a weight average molecular weight of 100,000 to 3,000,000, and the inorganic particles are contained in an amount of 10 to 40 parts by weight based on 100 parts by weight of the acrylic copolymer And the inorganic particles may be one or a mixture of two or more selected from the group consisting of nitrides, hydroxides, oxides, carbides, carbonates, metalates and metals having a particle diameter of 5 to 8 탆.

Wherein the radiating fin comprises 65 to 85 parts by weight of a metal powder, 10 to 30 parts by weight of a carbon composite material, and 5 to 10 parts by weight of a polymeric material, wherein the carbon composite material is a single-walled carbon nanotube (SWCNT) , A double-walled carbon nanotube (DWCNT), a multi-walled carbon nanotube (MWCNT), and a rope carbon nanotube, Aluminum, and the polymer resin may be polyethylene glycol.

According to the present invention as described above, it is possible to provide a flexible LED module for a vehicle which is flexibly implemented and is easy to apply to various non-planar shapes.

In addition, according to the present invention, it is possible to provide flexible flexible LED module for automobiles that can be flexibly formed in one direction or in a multifaceted direction, thereby variously implementing a non-planar structure such as a curve when sequentially fixing a plurality of LED packages.

In addition, according to the present invention, it is possible to provide a flexible LED module for a vehicle which can be omitted from soldering or the like and is easy to replace when a damaged LED is replaced and is environmentally friendly.

1 is an exploded perspective view of a flexible LED module for a vehicle according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along the line AA of Fig.
FIG. 3 is a cross-sectional view showing a main part of a flexible LED module according to an embodiment of the present invention, illustrating a process of inserting and fixing a lead and a cut portion.
4 is a plan view showing the manufacture and connection of the flexible LED module according to an embodiment of the present invention.
5 is a perspective view of a connection frame according to another embodiment of the present invention.
6 is a perspective view of a connection frame according to another embodiment of the present invention.
FIG. 7 is a view schematically showing a heat sink provided in the connection frame of FIG. 6. FIG.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also includes a case in which other media are connected to each other in the middle. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

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

1 is an exploded perspective view of a flexible LED module for a vehicle according to an embodiment of the present invention. 2 is a cross-sectional view taken along line A-A in Fig. FIG. 3 is a cross-sectional view showing a main part of a flexible LED module according to an embodiment of the present invention, illustrating a process of inserting and fixing a lead and a cut portion. 4 is a plan view showing the manufacture and connection of the flexible LED module according to an embodiment of the present invention.

The Flexible LED module for an automobile according to the embodiment of the present invention includes an LED 101 and two LEDs 101 extending from the LED chip 101 corresponding to polarities A plurality of LED packages (100) having leads (102a, 102b); And a plurality of connection frames (20) provided between the LED packages (100) to electrically connect and support two adjacent LED packages (100).

Each of the connection frames 20 includes a first connection portion 31 having a first cutout portion 36 into which one of the first polarity leads 102b of the neighboring LED packages 100 is inserted and fixed; A second connection part (32) having a second cutout (37) into which the second polar lead (102a) of the other LED package (100) is inserted and fixed; And a connection part 35 provided between the first connection part 31 and the second connection part 32 to electrically connect and support each other.

The leads 102a and 102b are conductors for electrically connecting the LED package 100, for example, copper or aluminum. The leads 102a and 102b may be variously provided as needed, for example, two leads may be provided corresponding to the positive electrode and the negative electrode, or four lead wires may be provided for each of the two leads.

The first connecting portion 31 and the second connecting portion 32 fix the respective LED packages 100 by inserting the leads 102a and 102b of the neighboring LED package 100, respectively. A first cutout portion 36 in which one of the first polarity leads 102b of the neighboring LED packages 100 is inserted and fixed is formed in the first connection portion 31 and a second cutout portion 36 is formed in the second connection portion 32, The second cutout portion 37 in which the second polar lead 102a of the LED package 100 is inserted and fixed is formed.

The first incision 36 and the second incision 37 may be rectangular, triangular, circular, and polygonal, preferably pentagonal.

When the LED package 100 is fixed on the first connection part 31 and the second connection part 32, the leads 102a and 102b are electrically connected to the respective first cutouts 36 and second The first cutout portion 37 and the second cutout portion 37 are bent together and then bent together with the first cutout portion 36 and the second cutout portion 37, And can be pressed and fixed to the lower portion.

When the lead 102b is inserted downward from the upper portion of the connecting frame 30, the second cutout portion 37 is pushed downward by the lead 102b. Thereafter, as shown in FIG. 2 (c), it is folded again with the lead 102b through the bending process and is fixed by pressing on the lower surface of the connection frame 30.

Here, each cutout portion 36, 37 may be formed in the shape of a hole in the connecting portions 31, 32 without a portion to be bent. In this case as well, the lead 102b is bent after passing through the cutout portion 37, and is pressed and fixed under the second connection portion 32. However, the portion to be bent by the cutout portions 36 and 37 as in the above- The lead 102b is pressed and fixed between the second connection portion 32 and the second cutout portion 37 so that the reliability of the compression bonding and the reliability of the electrical connection can be further improved.

Bending of the lead 102b and the second cutout 37 may be performed in various ways. For example, after inserting the leads 102b, they may be bent by using separate equipment such as a hammer, or by inserting a support between the inserted leads 102b and the connection frame 30 to fix the spacing distance It may be pressed downward on a die provided with a shape to be bent and bent together.

4, when the connection frame 30 is molded from the disk coil through a press operation, the connection frame 30 is still fixed to the scrap 200 or the like, A plurality of concave bent portions for bending may be formed on the lower mold corresponding to the positions of the cut portions 36 and 37 at different bending angles and then sequentially pressed and bended by passing through the bent portions.

In this case, the scrap 200 can be formed into various shapes as shown in FIG. 4 (c) or (d) by cutting the connection frame 30 and the LED package 100 after they are fixed to each other. The above method is advantageous in that mass production can be performed because the connection frame 30 and the fixing operation with the LED package 100 are sequentially performed through a press operation.

On the other hand, as shown in FIG. 3 (d), a stopper 105 may be further provided on each of the leads 102a and 102b. This is because when the respective LED packages 100 are fixed to the connection frame 30 by making the insertion depths of the leads 102a and 102b inserted into the respective cutouts 36 and 37 the same, So that they are spaced the same distance from the frame 30 and fixed.

The stopper 105 may be provided in various shapes and positions. For example, as shown in FIG. 3 (d), the front and rear sides of the leads 102a and 102b Longitudinal direction), or may be provided on the side as shown in Fig.

The connection frame 30 is provided between the respective LED packages 100 to electrically connect and support the adjacent two LED packages 100. The connection frame 30 includes electrically conductive plates 31a, 35 and 32a and heat radiating sheets 31b and 32b provided on the plates 31a, 35 and 32a. The plates 31a, 35 and 32a may be formed of a first connection part 31, a connection part 35 and a second connection part 32 in one direction, and the heat radiation sheets 31b and 32b may be formed of the first connection part 31 And the second connection part 32 to efficiently dissipate the heat generated in the LED package 100. FIG.

The connection portion 35 is provided between the first connection portion 31 and the second connection portion 32 and is electrically connected to and supported by each other. The connection part 35 physically or electrically supports the first connection part 31 and the second connection part 32 and is made of a flexible material so that the LED module can be flexibly bent in a predetermined direction.

Since the flexible LED module according to the present invention has the connection frames 30 spaced apart from each other, it is possible to warp by the spacing structure, and also to warp in the connection frame 30 itself.

The flexible LED module according to the embodiment of the present invention is provided with the connection frame 30 for physically and electrically supporting the two neighboring LED packages 100 between the connection frames 30 or between the connection frames 30 The LED package 100 can be flexed in one direction or in a multi-lateral direction, so that various shapes such as a curve can be realized when the plurality of LED packages 100 are sequentially fixed. In addition, since the connection frame 30 and the LED package 100 can be manufactured sequentially, it is advantageous in mass production and workability.

Heat-radiating sheets 31b and 32b are respectively provided on the first and second connecting parts 31 and 23 and the heat-radiating sheets 31b and 32b are graphite sheets having a thickness of 0.05 mm to 0.7 mm. And a thermally conductive adhesive layer formed on one or both surfaces of the graphite sheet and containing carbon nanotubes having an average diameter of 5 to 7 nm and having a thickness of 0.1 mm to 0.3 mm.

The thermally conductive adhesive layer may be composed of a carbon nanotube dispersion liquid and an acrylate polymer in which the carbon nanotubes are mixed with a solvent and dispersed by ultrasonic waves, and the solvent may be isopropyl alcohol, toluene, ethyl acetate, or methyl ethyl ketone .

In the case where the thickness of the graphite sheet is less than 0.05 mm, the graphite sheet can be used in the process of providing the thermally conductive adhesive layer. If the thickness is more than 0.1 mm, the total volume of the heat-radiating sheets 31b and 32b is unnecessarily increased. When the thickness of the thermally conductive adhesive layer is less than 0.1 mm, the adhesive force for fixing the LED package 100 is insufficient and it is difficult to fix the carbon nanotube uniformly dispersed in the thermally conductive adhesive layer. When the thickness is 0.3 mm, the carbon nanotubes can be uniformly dispersed and fixed, and sufficient adhesion can be provided. If the thickness exceeds 0.3 mm, unnecessary production costs are increased.

Hereinafter, another embodiment of the present invention will be described with reference to Figs. 5 to 7. Fig. Except for the contents to be described later, the contents similar to those described in the embodiments described with reference to Figs. 1 to 4 will not be described in detail.

5 is a perspective view of a connection frame according to another embodiment of the present invention.

Referring to FIG. 5, in the Flexible LED module for automobile according to the present embodiment, the LED package may be mounted on the connection frame 300 and electrically connected between neighboring LED packages. The connection frame 300 includes a first connection part 310 having a first cutout part 360 to which a lead of one of the neighboring LED packages is connected and a second connection part 310 having a lead A second connection part 320 provided with two cutouts 370 and a connection part 350 connecting the first connection part 310 and the second connection part 320 to each other.

The connection part 350 includes first and second wires 351 extending from the first and second connection parts 310 and 320 and a spring part 352 connecting the first and second wires 351 ). The ends of the first and second wires 351 and 351 may have a threaded coupling portion 351a and may be screwed into the spring portion 352.

In the connection frame 300 according to the present embodiment, the connection part 350 is provided in a wire shape so that the connection of the neighboring LED package can be flexibly controlled. In addition, The interval between the LED packages can be easily controlled by the light emitting diode driver 352. In addition, since the spring portion 352 is reversibly attached and detached between the first and second wires 351 constituting the connection portion 350, assembly of the connection frame 300 can be facilitated.

6 is a perspective view of a connection frame according to another embodiment of the present invention. FIG. 7 is a view schematically showing a heat sink provided in the connection frame of FIG. 6. FIG.

6 and 7, the connection frame 400 may be provided with an annular fixing part 480 having elasticity on the side surfaces of the first connection part 410 and the second connection part 420 . The first connection part 410 and the second connection part 420 may have a groove part 481 recessed inwardly at a portion corresponding to the fixing part 480.

The heat sink 490 is fixed to the fixing portion 480 so that the heat sink 490 is fixed to the groove portion 481 and the heat sink 492 is fixed to the fixing portion 480. [ And may be fixed to the first connection part 410 and the second connection part 420 by the fixing part 480.

The heat sink 490 includes a support plate 491 made of aluminum, a plurality of heat dissipation fins 493 formed in a wave form on the support plate 491, And a hook portion 492 which is inserted and fixed to the fixing portion 480.

The heat dissipation fins 493 are provided in the form of corrugations so that the flow of heat can be easily controlled to further improve the heat dissipation effect. The radiating fin 493 is composed of 65 to 85 parts by weight of a metal powder, 10 to 30 parts by weight of a carbon composite material, and 5 to 10 parts by weight of a polymeric material, and the carbon composite material is a single wall carbon nanotube (SWCNT) walled carbon nanotubes (DWCNTs), multi-walled carbon nanotubes (MWCNTs), and rope carbon nanotubes (MWCNTs) , The metal powder is aluminum, and the polymer resin may be polyethylene glycol. In the heat sink 490, the support plate 491 may be made of the same aluminum as the metal powder. By providing the support plate 491 with the same metal as the radiating fin 493, the manufacturing efficiency of the heat sink 490 can be improved and the flow of heat can be more efficiently controlled and the heat radiating effect can be improved.

The metal powder is less than 65 parts by weight in the radiating fins 493 to lower the strength of the radiating fins 490. When the amount of the metal powder is more than 85 parts by weight, If the amount of the carbon composite material is less than 10 parts by weight, improvement in the heat radiation effect is insufficient. If the amount is more than 30 parts by weight, the mechanical strength of the radiating fin 493 may be lowered. When the amount of the metal powder is less than 5 parts by weight, the bonding strength between the metal powder and the carbon composite material is lowered, and when the amount is more than 10 parts by weight, the metal powder and the carbon composite material may bind. The overall heat dissipation performance of the heat sink is deteriorated.

The heat sink 490 pulls the fixing portion 480 to be inserted and fixed so that the fixing portion 492 of the heat sink 490 is seated in the groove portion 481 and fixed by the fixing portion 480 .

The hooking portion 492 includes a vertical portion 492a vertically extending from the support plate 491 and engaged with the fixing portion 480 and a vertical portion 492b parallel to the support plate 491 in the vertical portion 492a And a horizontal portion 492b extending from the lower end of the first connection portion 410 and contacting the lower ends of the first and second connection portions 410 and 420.

The horizontal part 492b is in contact with the lower surfaces of the first connection part 410 and the second connection part 420 and is connected to the first connection part 410 and the second connection part 420 at the horizontal part 492b. An adhesive 492b2 may be provided on the upper surface to be in contact. For example, the vertical part 492a is made of aluminum, while the horizontal part 492b is connected to the vertical part 492a to further include an aluminum part 492b1 and an adhesive 492b2 provided thereon .

The pressure-sensitive adhesive may be composed of a mixture of an acrylic copolymer, a crosslinking agent and an inorganic particle. Wherein the acrylic copolymer has a weight average molecular weight of 100,000 to 3,000,000 and the inorganic particles contain 30 to 40 parts by weight based on 100 parts by weight of the acrylic copolymer and the inorganic particles have a particle diameter of 5 to 8 占 퐉, , An oxide, a carbide, a carbonate, a metal salt and a metal,

Specifically, based on the total weight of the monomers constituting the acrylic copolymer, 85 to 99% by weight of a monomer having no cross-linkable functional group and 1 to 15% by weight of a monomer having a cross-linkable functional group are copolymerized. When the amount of the monomer having no functional group in the acrylic copolymer is less than 85% by weight, the problem of the storage stability of the pressure-sensitive adhesive due to the relatively large number of functional groups and the deterioration of the cohesive force of the pressure- On the other hand, when it exceeds 99% by weight, the reactivity of the functional group is remarkably lowered, so that the reaction may not be performed well and the cohesion is deteriorated due to the decrease of the degree of crosslinking.

The acrylic copolymer preferably has a weight average molecular weight of 100,000 to 3,000,000, more preferably 40,000 to 1,000,000. When the weight-average molecular weight is less than 100,000, cohesive failure may occur. On the other hand, when the weight average molecular weight exceeds 3,000,000, viscosity may be increased and workability may be deteriorated.

The cross-linking agent may be added to enhance the durability of the acrylate-based copolymer. The crosslinking agent is characterized in that 100 parts by weight of the acrylate-based copolymer contains 1 to 10 parts by weight of an epoxy crosslinking agent or a polyfunctional isocyanate crosslinking agent. If the crosslinking agent is contained in an amount of less than 1 part by weight, the reaction with the functional group contained in the acrylic copolymer can not be performed well and the cohesive force of the adhesive can not be strengthened. On the other hand, when the cross-linking agent exceeds 10 parts by weight, the pressure-sensitive adhesive layer undergoes a change during processing due to the increase in reactivity, so that the applied pressure-sensitive adhesive layer can not exhibit constant physical properties and additionally a retarding agent This is not appropriate because it involves additional management.

Examples of the epoxy crosslinking agent include epoxy resin of the bisphenol A-epichlorohydrin type, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, And the like can be used. Examples of the polyfunctional isocyanate crosslinking agent include toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, trimethylol propane adduct of toluene diisocyanate, and mixtures thereof.

The inorganic particles may be provided to impart thermal conductivity, and may have a particle diameter of 5 to 8 탆. When the particle size of the inorganic particles is less than 5 탆, the particles may become difficult to disperse and aggregation may occur between the particles, resulting in deterioration of thermal conductivity and adhesiveness. On the other hand, when the particle size is larger than 8 탆, So that the adhesion area and adhesion may be deteriorated.

The inorganic particles are preferably contained in the pressure-sensitive adhesive composition for a heat-radiating sheet in an amount of 10 to 40 parts by weight based on 100 parts by weight of the acrylic copolymer. When the content of the inorganic particles is less than 10 parts by weight, the filling density of the particles is low, and it is difficult to exhibit excellent thermal conductivity. On the other hand, when the content of the inorganic particles exceeds 40 parts by weight, the filling density is high, And the surface of the adhesive layer is not smooth, so that it is difficult to sufficiently adhere to the adherend.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

30: connection frame 31: first connection
32: second connection part 35: connection part
36: first incision part 37: second incision part
100: LED package 101: LED chip
102a, 102b: lead 105: stopper

Claims (7)

As an LED module used in automobiles,
A plurality of LED packages each having at least two leads extended from the LED chip in correspondence to the respective polarities;
And a plurality of connection frames provided between the LED packages to electrically connect and support two neighboring LED packages,
The connection frame includes:
A first connection portion having a first cutout portion in which any one of the neighboring LED packages is inserted and fixed;
A second connection portion having a second cutout portion in which the second polarity lead of the other LED package is inserted and fixed;
And a connection portion provided between the first connection portion and the second connection portion to electrically connect and support the first connection portion and the second connection portion,
Wherein the first and second connection portions are provided with a heat radiation sheet,
The heat-
A graphite sheet having a thickness of 0.05 mm to 0.7 mm; And
And a thermally conductive adhesive layer formed on one side or both sides of the graphite sheet and containing carbon nanotubes having an average diameter of 5 to 7 nm and a thickness of 0.1 mm to 0.3 mm,
Wherein the thermally conductive adhesive layer is composed of a carbon nanotube dispersion liquid and an acrylate polymer in which the carbon nanotubes are mixed with a solvent and dispersed by ultrasonic waves, and the solvent is at least one selected from the group consisting of isopropyl alcohol, toluene, ethyl acetate, Flexible LED module. The method according to claim 1,
Wherein the first connection portion and the second connection portion are formed such that when the LED package is fixed on the upper portion, the first polarity lead and the second polarity lead push the first and second cut portions, And the second incision portion, and is press-fitted to the lower portion of each of the connection portions. 3. The method of claim 2,
The connection portion includes first and second wires respectively extended from the first and second connection portions and a spring portion connecting the first and second wires,
Wherein the first and second wires and the distal end of the flexible module have a threaded coupling portion and are screwed into the spring portion. 3. The method of claim 2,
The first connecting portion and the second connecting portion are each provided with a ring-shaped fixing portion having elasticity, and a side surface of the first connecting portion and the second connecting portion is provided with a recessed portion inwardly recessed in a portion corresponding to the fixing portion A heat sink is fixed to the fixing portion,
The heat sink includes a support plate made of aluminum, a plurality of radiating fins provided in a wave form on the support plate, and a flexible member for a vehicle, which is protruded in an L shape at one end of the support plate, (Flexible) LED module. 5. The method of claim 4,
The heat sink is inserted and fixed by pulling the fixing portion so that the hook portion of the heat sink is seated in the groove portion and fixed by the fixing portion,
Wherein the hook portion includes a vertical portion extending vertically from the support plate and coupled with the fixing portion and a horizontal portion extending parallel to the support plate in the vertical portion and contacting the lower ends of the first and second connection portions,
Wherein a pressure-sensitive adhesive is provided on a surface of the upper surface of the horizontal portion that is in contact with a lower end of the first connection portion and the second connection portion. 6. The method of claim 5,
The pressure-sensitive adhesive comprises a mixture of an acrylic copolymer, a crosslinking agent and inorganic particles,
Wherein the acrylic copolymer has a weight average molecular weight of 100,000 to 3,000,000 and the inorganic particles contain 10 to 40 parts by weight based on 100 parts by weight of the acrylic copolymer and the inorganic particles have a particle diameter of 5 to 8 占 퐉, , A mixture of one or more selected from the group consisting of oxides, carbides, carbonates, metal salts and metals. 5. The method of claim 4,
Wherein the radiating fin comprises 65 to 85 parts by weight of a metal powder, 10 to 30 parts by weight of a carbon composite material and 5 to 10 parts by weight of a polymer resin,
The carbon composite material may be a single-walled carbon nanotube (SWCNT), a double-walled carbon nanotube (DWCNT), a multi-walled carbon nanotube (MWCNT) Wherein the metal powder is aluminum, and the polymer resin is polyethylene glycol. 2. The flexible LED module according to claim 1, wherein the carbon nanotubes are carbon nanotubes.

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