KR101129346B1 - Light emitting diode lamp - Google Patents

Abstract

PURPOSE: A light emitting diode lamp is provided to diffuse light in left and right sides from a single light emitting diode lamp, thereby increasing light distribution uniformity between lamps. CONSTITUTION: A cover member is comprised of a support cover(20) and a socket cover(10) which includes a socket(15). A plurality of frames(30) is fixed to the socket cover and the support cover. A plurality of heat dissipation fins(40) is installed between the socket cover and the support cover. A heat sink(60) is combined with the edge of the heat dissipation fin. A plurality of LED devices(72) is arranged on the surface of an LED substrate(70).

Description

Light Emitting Diode Lamp

The present invention relates to a light emitting diode lamp.

In general, a light emitting diode lamp is a lamp using an LED as a light source, and is known to be relatively low power consumption, long life, and suitable for environmental protection, compared to conventional lamps such as incandescent lamps, mercury lamps, halogen lamps, or metal halide lamps.

The problem is that when the LED is turned on, it heats up at high temperatures, which adversely affects the LED semiconductor chip and shortens the life of the LED.

In order to solve this problem, a cooling plate is installed to radiate heat generated from the light emitting diode lamp to the outside quickly and radiated by convection, or a cooling fan is installed to force air cooling.

However, when the cooling plate or the cooling fan is installed, there is a disadvantage in that the volume and weight of the light emitting diode lamp itself are increased, and in particular, there is a problem that it cannot be applied to an existing luminaire having a predetermined size.

In addition, in the conventional LED lamps, the LED elements are arranged in a double row, and since the light is emitted with the same illuminance from each LED element, for example, when the lamp is applied to a street lamp, a relatively uniform part immediately under one street lamp is relatively uniform. Although the illuminance may be shown, the illuminance in the middle part between the street lamps is significantly reduced. Accordingly, there is a problem in that it causes problems in the safe driving of the car.

It is therefore an object of the present invention to provide a light emitting diode lamp which makes the distribution of light distribution between the lamps uniform.

Another object of the present invention is to provide a light emitting diode lamp having excellent cooling efficiency, simple mechanical configuration, and light weight.

The above object is a cover member comprising a socket cover having a socket to which power is supplied, and a support cover spaced apart from the socket cover; A plurality of frames fixed at both ends to the socket cover and the support cover; A plurality of heat dissipation fins supported by the frame and spaced apart between the socket cover and the support cover; A heat sink coupled to an edge of the heat dissipation fins; A plurality of heat pipes having a first contact portion fitted into a receiving groove of the heat sink and a second contact portion penetrating and contacting the heat dissipation fins; An LED substrate having a back surface coupled to the heat sink and having a plurality of LED elements arranged on a surface thereof; And a transmissive lens plate coupled to the surface of the LED substrate and having a convex lens corresponding to the LED element.

Preferably, the heat dissipation fins may be embossed to form a plurality of protrusions.

In addition, the front surface of the heat dissipation fin may be a coating coating.

Preferably, the translucent lens plate is divided into three equal parts in the width direction, the left side includes a left convex lens deflected to the left side, the right side includes a right convex lens deflected to the right side, and the center has both convex lenses deflected to the left and right sides. can do.

Preferably, the light transmissive lens plate may include both convex lenses biased to the left and right sides thereof on the front surface thereof.

Preferably, a thermally conductive grease or a thermally conductive compound may be interposed between the heat sink and the LED substrate and between the heat sink and the heat pipe.

Preferably, the first contact portion of the heat pipe may be in surface contact with the rear surface of the LED substrate, for example, the horizontal cross-sectional shape of the first contact portion of the heat pipe may be semicircular.

Preferably, a heat sink accommodating portion is formed at an edge of the heat dissipation fin that is coupled to the heat sink, engaging grooves are formed at both sides of the heat sink accommodating portion, and ribs are formed to protrude from portions other than the both sides, and correspond to the engaging grooves. Therefore, the locking jaw may be formed in the heat sink.

Preferably, reflecting plates may be installed at upper and lower ends of the heat sink, respectively.

Preferably, the rear surface of the LED substrate may be bonded to the thermal conductive metal plate via a thermally conductive and electrically insulating adhesive film or resin.

Preferably, the middle portion of the width direction in the transmissive lens plate is cut in the height direction so that the divided transmissive lens plates may each protrude at a predetermined angle.

According to the above structure, there is an advantage that the cooling efficiency is excellent, the mechanical configuration is simple and the weight is light.

In addition, since light is deflected to the left and right around a single light emitting diode lamp, the light distribution between the lamps is uniform.

1 is an external view illustrating a light emitting diode lamp according to an exemplary embodiment of the present invention.
2 is an exploded perspective view showing a light emitting diode lamp according to an embodiment of the present invention.
3 shows a laminated structure of the heat dissipation fin of the present invention.
4 shows the coupling structure of the heat pipe, the heat sink and the heat dissipation fin in detail.
5 shows light distribution by the light transmitting lens plate.

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

1 is an external view illustrating a light emitting diode lamp according to an exemplary embodiment of the present invention.

Referring to the light emitting diode lamp 100 of FIG. 1, the heat dissipation fins 40 are stacked between the socket cover 10 and the cover 20 on which the sockets 15 are formed while maintaining a gap, and the edges are formed by the frame 30. It is supported, it is installed so that the light transmitting lens plate 80 is exposed on either side of the heat dissipation fin 40 stack.

Here, since the socket 15 is provided in the same standard as the socket installed in the conventional luminaire, the socket 15 can be used as it is without replacing the luminaire even when mounting the light emitting diode lamp of the present invention to the conventional luminaire.

On the other hand, each of the convex lenses 82 arranged on the translucent lens plate 80 constitutes both convex lenses, or the left convex lens, the right convex lens, or both convex lenses may be arranged according to the arrangement position of the convex lens 82. Can be. This will be described later.

According to this structure, the distribution of light distribution between the lamps is made uniform by the convex lens arranged on the light transmitting lens plate 80.

2 is an exploded perspective view showing a light emitting diode lamp according to an embodiment of the present invention, Figure 3 shows a laminated structure of the heat dissipation fin of the present invention, Figure 4 shows a detailed coupling structure of the heat pipe and the heat sink and the heat dissipation fins. .

As shown, the light emitting diode lamp of the present invention includes a cover member (10, 20), a frame (30), a plurality of heat radiation fins (40), a plurality of heat fights (50), LED substrate (60), and light projection It consists of a cover 70.

Cover member 10, 20 and frame 30

The cover members 10 and 20 may include a socket cover 10 having a socket 15 to which power is supplied, and a support cover 20 spaced apart from the socket cover 10.

2, screw holes 12 and 22 are formed along the edges of the socket cover 10 and the support cover 20, and both ends of the bar-shaped frame 30 are screw holes 12, respectively. It is fixed to the socket cover 10 and the support cover 20 by screws 32 fitted to the 22. To this end, for example, screw holes may be formed at both ends of the frame 30 to couple the screws 32.

Although the number of the frames 30 is not particularly limited, it is preferable to provide three or more, and four frames are applied in this embodiment.

In this way, the basic cover constituting the light emitting diode lamp 100 by the socket cover 10 and the support cover 20 and the frame 30 to keep them spaced apart.

Heat dissipation fins (40)

Referring to FIG. 2, a plurality of heat dissipation fins 40 are vertically overlapped in a state where they are spaced at a predetermined gap so that air is convexed between the gaps so that heat is released from the heat dissipation fins 40.

The heat dissipation fin 40 has a sheet shape made of a thermally conductive material, and the protrusions 44 protrude from the front surface by embossing on the front surface. The heat dissipation fin 40 may protrude from either the surface or the rear surface, and may protrude on both sides. According to such a structure, the surface area of the heat dissipation fin 40 is substantially increased by the projections 44, thereby ensuring the maximum air contact area. As a result, the operating temperature of the LED lamp can be lowered to extend the life and reduce the power consumption.

Preferably, the surface and the back surface of the heat dissipation fin 40 may be a corrosion-resistant coating. For example, the heat dissipation fin 40 uses aluminum having excellent thermal conductivity and inexpensive manufacturing cost. When the heat dissipation fin 40 directly contacts the outside air as in the present invention, oxidation and corrosion may occur by the outside air. Corrosive coatings can prevent this oxidation and corrosion.

In order to maintain the gap between the heat dissipation fins 40, a plurality of spacers 42 protrude from the surface of the heat dissipation fins 40. The spacer 42 can be formed, for example, by cutting the heat dissipation fin 40 itself.

In addition, a through hole 45 through which the second contact portion 53 of the heat pipe 50 to be described later passes is formed, and the number of the frames 30 along the edge of the pocket 41 for accommodating the frame 30 is formed. It is formed to fit.

Meanwhile, referring to FIG. 4, a heat sink accommodating portion 46 is formed at an edge contacting the heat sink 60, which will be described later, and the heat sink accommodating portion 46 of the heat sink accommodating portion 46 is enlarged to widen the contact area with the heat sink 60. Ribs 47 protrude from the edges.

In addition, as shown in FIG. 4, a locking portion 46a may be formed at both sides of the heat sink receiving portion 46.

Heatsink (60)

As described above, the heat sink accommodating portion 46 accommodates a single body heat sink 60. Preferably, the locking jaw (60a) of the shape corresponding to the locking portion 46a of the heat sink receiving portion 46 is formed can be fitted to the heat sink receiving portion 46 to be coupled. However, the coupling structure is not limited to this.

Referring to FIG. 4, in the heat sink 60, accommodation grooves 62 in which the heat pipe 50 is accommodated are formed in a number corresponding to the number of the heat pipes 50.

Meanwhile, referring to FIG. 2, reflecting plates 64 and 66 are mounted at upper and lower ends of the heat sink 60, respectively, to reflect light emitted from the LED elements 72 arranged on the LED substrate 70. The loss can be prevented.

Heat pipe (50)

2 and 4, the heat pipe 50 is formed in contact with the heat dissipation fin 40 while passing through the first contact portion 51 and the heat dissipation fin 40 that contact the heat sink 60 in a U shape as a whole. 2 contact portion 53, and the connection portion 52 for connecting the first and second contact portions (51, 53).

Preferably, the portion in contact with the LED substrate 70 in the first contact portion 51 of the heat pipe 50 is planar to increase the contact area. In other words, the first contact portion 51 of the heat pipe 50 and the LED substrate 70 make a surface contact.

In this embodiment, the horizontal cross section of the first contact portion 51 of the heat pipe 50 forms a semi-circular shape so that the portion contacting the LED substrate 70 is a flat surface, but is not limited thereto. . In particular, in order to enlarge the contact area of the 1st contact part 51, a cross-sectional shape can be made semi-elliptical.

As is well known, a wick is installed inside the heat pipe 50 and a heat transfer medium is accommodated so that when heat is applied to one end, heat transfer is rapidly transferred to the other end while the heat transfer medium is vaporized by a capillary phenomenon caused by the wick. .

Therefore, the heat transferred from the LED substrate 70 to the first contact portion 51 of the heat pipe 50 is quickly transferred to the second contact portion 53 inside the heat pipe 50 to the second contact portion 53. It is transmitted to the outside through the heat dissipation fin 40 in contact with the.

According to this structure, the heat discharged from the LED substrate 70 includes the first path consisting of the heat sink 60-the heat dissipation fin 40, and the first contact part 51-second contact part of the heat pipe 50. (53)-Since the heat is transmitted through the double path of the second path made of the heat dissipation fins 40, there is an advantage that the heat transfer is made quickly and efficiently.

Preferably, a thermally conductive grease or a thermally conductive pad may be interposed between the first contact portion 51 of the heat pipe 50 and the heat sink 60. Accordingly, even a minute gap is not allowed between the first contact portion 51 and the heat sink 60 of the heat pipe 50, so that heat transfer may be more efficiently performed.

LED Board (70)

A plurality of LED elements 72 are arranged on the surface of the LED substrate 70, and the power supplied to the socket 15 is applied to the LED elements 72 through conductive wires (not shown).

Referring to FIG. 2, the LED elements 72 are designed in such a way that the LED elements 72 are configured in series and in parallel so as not to significantly affect the overall brightness and performance even if about 50% is defective. In this embodiment, ten LED elements 72 are arranged in six rows in the width direction in the height direction.

Preferably, the rear surface of the LED substrate 70 can be integrated by bonding a thermally conductive metal plate through a thermally conductive and electrically insulating adhesive film or resin. Here, the thermally conductive metal plate may be an insulating heat dissipation coating.

According to this structure, heat can be conducted more quickly from the LED substrate 70 through the thermally conductive metal plate.

Floodlight Plate (80)

5 shows light distribution by the light transmitting lens plate 80.

2 and 5, convex lenses 82 protruding from the translucent lens plate 80 are formed corresponding to the LED elements 72 arranged on the LED substrate 70.

The back surface of the translucent lens plate 80 is melt-bonded by a thermally conductive and electrically insulating adhesive film to be bonded to the LED substrate 70 to have a thermal conductivity effect and an electrical insulation effect.

When viewed from above, the light distribution lens can be uniformly distributed by dividing the transmissive lens plate 80 into three equal parts in the width direction to change the shape of the convex lens 82 provided on the left, right, and middle sides.

Specifically, the convex lens provided on the left side is composed of the left convex lens 82a, the convex lens installed on the right side is composed of the right convex lens 82b, and the convex lens installed on the center is composed of both convex lenses 82c. .

According to this configuration, as shown in Fig. 5, the light is diffused by the left convex lens 82a provided on the left side and diffused, and the light is deflected to the right by the right convex lens 82b provided on the right side. The light is diffused, and the light is diffused by being deflected in both the left and right directions by both convex lenses 82c disposed at the center.

As a result, the light is deflected to the left and right around the light emitting diode lamp and diffuses, so that the illuminance between the lamps is uniform.

Looking at the experimental results by the present inventors are as follows. Experimental conditions, the conventional metal halide lamp and the light emitting diode lamp according to the present invention was applied to the street lamp, the height of the street lamp is 8m, the distance between the street lamp is 40m, the measured illuminance is a height of 1m from the ground.

Kinds Street light Mid-illuminance between street lights Metal halide lamp 50 to 60 lux 5 to 10 lux LED lamp 30lux 20-25lux

As can be seen from this result, in the case of the light emitting diode lamp of the present invention, the illuminance of the middle part between the illuminance under the street lamp and the street lamp does not show a large difference.

On the other hand, in the case of applying the conventional metal halide lamp, it can be seen that the roughness of the middle portion between the street lamps is greatly reduced compared to the illuminance directly under the street lamp.

In this embodiment, the case in which the LED arrays disposed on the left and right are the left convex lens and the right convex lens, respectively, is exemplified. However, the present invention is not limited thereto, and all of the LED arrays may be arranged as both convex lenses. In this case, while obtaining the same effect as above, there is an advantage in that the illuminance directly under the street lamp in which the light emitting diode lamp is installed can be further increased.

In addition, the light transmitting lens plate 80 may be cut in the middle of the width direction in the height direction so that the divided light transmitting lens plates 80 may protrude at a predetermined angle. According to such a structure, the uniform spreadability of the light emitted from the LED element 72 can be improved.

In the above embodiment, the cover members 10 and 20 may be made of, for example, synthetic resin, and the frame 30, the heat dissipation fin 40, the heat sink 60, and the LED substrate 70 may be made of light metal such as aluminum or magnesium. The overall weight can be reduced by applying.

In the above, the present invention has been described based on the preferred embodiment, but the present invention is not limited to the above-described embodiment. Therefore, the scope of the present invention should not be construed as being limited to the above embodiments but should be interpreted by the claims described below.

10: socket cover
15: socket
20: support cover
30: frame
40: heat dissipation fin
41: Pocket
42: spacer
44: turning
46: heat sink receptacle
47: rib
50: heat pipe
51: first contact portion
52: connection
53: second contact portion
60: heatsink
62: acceptance home
70: LED substrate
72: LED device
80: light transmitting lens plate
82, 82a, 82b, 82c: convex lens

Claims (12)

A cover member comprising a socket cover having a socket to which power is supplied, and a support cover spaced apart from the socket cover;
A plurality of frames fixed at both ends to the socket cover and the support cover;
A plurality of heat dissipation fins supported by the frame and spaced apart between the socket cover and the support cover;
A heat sink coupled to an edge of the heat dissipation fins;
A plurality of heat pipes having a first contact portion fitted into a receiving groove of the heat sink and a second contact portion penetrating and contacting the heat dissipation fins;
An LED substrate having a back surface coupled to the heat sink and having a plurality of LED elements arranged on a surface thereof; And
And a transmissive lens plate coupled to a surface of the LED substrate and having a convex lens corresponding to the LED element. The method according to claim 1,
The heat dissipation fins are embossed so that a plurality of protrusions are formed. The method according to claim 1 or 2,
A light emitting diode lamp, characterized in that the front surface of the heat dissipation fin has been coated with a corrosion. The method according to claim 1,
The translucent lens plate is divided into three equal parts in the width direction, the left side includes a left convex lens deflected to the left side, the right side includes a right convex lens deflected to the right side, and the center includes both convex lenses deflected to the left and right sides. Light emitting diode lamp. The method according to claim 1,
The transmissive lens plate has a convex lens that is biased in both the left and right sides on the front surface. The method according to claim 1,
And a thermally conductive grease or a thermally conductive compound is interposed between the heat sink and the LED substrate and between the heat sink and the heat pipe. The method according to claim 1,
And a first contact portion of the heat pipe is in surface contact with a rear surface of the LED substrate. The method according to claim 7,
The horizontal cross-sectional shape of the first contact portion of the heat pipe is a semi-circular light emitting diode lamp. The method according to claim 1,
A heat sink accommodating portion is formed at an edge of the heat dissipation fin that is coupled to the heat sink, engaging grooves are formed at both sides of the heat sink accommodating portion, and ribs protrude from portions except the both sides.
A light emitting diode lamp, characterized in that the locking jaw is formed in the heat sink corresponding to the locking groove. The method according to claim 1,
Light emitting diode lamps, characterized in that the reflector is installed on the top and bottom of the heat sink, respectively. The method according to claim 1,
The back surface of the LED substrate is a light-emitting diode lamp, characterized in that the thermally conductive metal plate is bonded via a thermally conductive and electrically insulating adhesive film or resin. The method according to claim 1,
The light emitting diode lamp of claim 4, wherein the light transmissive lens plate is formed by cutting a middle portion of the transverse lens plate in a height direction and protruding at a predetermined angle.

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