Lamp using LED

Provided is a lamp using LED which has a heat sink and an air-flowing part formed in a body and is equipped with a heat pipe to make higher a heat-conductive efficiency and thereby to make higher a heat-generation performance considerably so that the light emitting diode can be applied to a high-output illumination device to increase a life-time.

CROSS-REFERENCE(S) TO RELATED APPLICATIONS

The present invention claims priority of Korean Patent Application No. 10-2010-0026143, filed on Mar. 24, 2010, which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a lamp using LED; and, more particularly, to a lamp using LED which has a heat sink and an air-flowing part formed in a body and is equipped with a heat pipe to make higher a heat-conductive efficiency and thereby to make higher a heat-generation performance considerably so that the light emitting diode can be applied to a high-output illumination device to increase a life-time.

2. Description of Related Art

The light emitting diode (LED) is an optoelectronic element having a junction structure of P-type and N-type semiconductor to discharge the light of energy corresponding to bandgap of the semiconductor if electrons and holes combine when the power is applied, and it is spotlighted as the lighting means of a high efficiency since a response time is higher compared with the general bulb and the consumed power is lower by 20% compared with the general bulb even when the illuminance is higher.

In a case of using a high-output light emitting diode as a lighting lamp, since a large amount of heat is generated from the light emitting diode module, the heat generated from the light emitting diode module having the junction structure of the semiconductor can reduce the illumination efficiency. Therefore, there is needed a means for discharging the heat generated from the light emitting diode module.

FIG. 1shows a general light emitting diode illumination device10, which includes a substrate1; a light emitting diode module2provided in one side of the substrate1; a heat sink3provided in the other side of the substrate1for discharging the heat generated from the light emitting diode module2.

In addition, the prior light emitting diode illumination device10includes a sealing means4such as a lens which keeps an air-tight seal on the light emitting diode module2of the substrate1to protect an internal structure while transmitting the light and it can be further equipped with a heat pipe to improve a heat-dissipation efficiency of the heat sink3.

However, in the prior light emitting diode illumination device having the heat-dissipation structure mentioned-above, a sufficient heat-dissipation performance can not be obtained, which leads to a major cause of decreasing the life time of the light emitting diode module.

The prior light emitting diode illumination device can not transfer the heat effectively since the heat generated from the light emitting diode module is transferred to the heat sink through the substrate, and particularly it has a problem that the heat-transfer efficiency is low since the insulating layer is formed on a top side of the substrate.

Further, since the top side of the substrate is sealed by the sealing means to cause it to be interrupted from the outside air, the heat-dissipation performance is lowered.

Subsequently, in the high-output illumination device such as the lamp, there is needed a scheme for dissipating the heat generated from the light emitting diode module effectively and improving a durability and a life-time higher.

SUMMARY OF THE INVENTION

The present invention is contemplated to resolve the problems mentioned-above, and an object of the present invention is directed to providing a lamp using LED which has an air-flowing part formed in a body and is equipped with a heat pipe to make higher a heat-conductive efficiency and thereby to make higher a heat-generation performance considerably so that the light emitting diode can be applied to a high-output illumination device to increase a life-time.

One embodiment of the present invention is directed to providing a lamp using LED, comprising a substrate in which a plurality of light emitting diodes110is disposed at a predetermined distance and which has at least one first hollow-part formed by hollowing a predetermined region so that an air flows through it; a body200which has a heat sink210provided in one side of the substrate100to cause a heat generated from the light emitting diode110to be transferred and an air-flowing part220hollowed to correspond to the first hollow-part; and a protecting means300which is attached to the body200in the other side of the substrate100to protect the substrate100and has a second hollow-part301hollowed to correspond to the first hollow-part and the air-flowing part.

Preferably, the lamp using LED1000is formed with a holding means400which holds the body200to cause the air-flowing part220to be communicated upward and downward.

Preferably, the air-flowing part220is formed with a plurality of hollow holes221.

Further, the lamp using LED1000is formed with a heat pipe500which is provided between the body200and the substrate100.

Preferably, the body200has a concave-type setting part230into which the heat pipe500is set.

Preferably, the heat pipe500is formed adjacent to the air-flowing part220.

Preferably, a predetermined area of the heat pipe500is located in the air-flowing part220.

DESCRIPTION OF SPECIFIC EMBODIMENTS

The advantages, features and aspects of the invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, which is set forth hereinafter.

The lamp using LED1000according to the present invention will be described specifically referring to accompanying drawings.

The lamp using LED1000according to the present invention includes a substrate100, a body200and a protecting means300.

The substrate100has the light emitting diodes110disposed at a predetermined distance, and can be used with a metal substrate or a printed circuit board which has a pattern for providing a power source to an insulating layer and the light emitting diode formed on a parent metal.

The body200is provided on one side of the substrate100(a side opposite to the side in which the light emitting diode110is provided to radiate the heat), and is formed with a heat sink210to which the heat generated from the light emitting diode110is transferred to dissipate the heat while supporting the substrate100at one side.

For the purpose of it, the body200has at least one air-flowing part220formed by hollowing a predetermined region so that the air flows through it.

In other words, the air-flowing part220is not formed in such a way that an outer peripheral surface of the body200is partially changed, but formed in the inside region of the body200. And the air-flowing part of the air-flowing part220has a closed cross-section.

The air-flowing part220is to allow the air inside the body200to flow through it and to allow the heat generated from the light emitting diode110to be dissipated smoothly.

At this time, the air-flowing part220can be formed at least one, and one air-flowing part220includes a plurality of hollow-holes221.

Further, the hollow-holes221can be formed with a honey-type (octagonal cross-section) to make the air flow easy and make the heat-dissipation performance higher, and formed with polygonal, round, ellipse and the like in addition to it.

The substrate100is formed with a first hollow-part101having a shape corresponding to a shape of the air-flowing part220to make the air flow smooth at the air-flowing part220of the body200.

The protecting means300is attached to the body200at the other side of the substrate100to protect the substrate100and the protecting means300must be made from transmission-type material to protect the inside structure while passing the light radiated from the light emitting diode110.

The protecting means300is formed with a second hollow-part301having a shape corresponding to a shape of the air-flowing part220to enable the air to flow through the air-flowing part220of the body200.

The protecting means300is preferably provided such that the inside of the body200may be kept air-tight at a periphery of the second hollow-part301and a periphery of the protecting means300.

The protecting means300for protecting the light emitting diode110can conventionally function as an element of reducing the heat-dissipation performance by interrupting the outside air, whereas the lamp using LED1000according to the present invention can be applied to high-output illuminating device without a reduction of the heat-dissipation performance since the air-flowing part220is formed in the body200and the second hollow-part301having a shape corresponding to the shape of the air flowing-part220is formed in the protecting means300.

The lamp using LED1000according to the present invention has a holding means400for holding the body200in order to irradiate the light downwardly from a predetermined height.

The holding system400can be formed with various materials and various shapes in order to hold the body200while enabling the light emitting diode110to irradiate the light in a predetermined direction.

At this time, the holding means400preferably holds the body200to cause the air-flowing part220to be communicated in both downward and upward directions.

To allow the air flowing part220to be communicated in both downward and upward directions is for the purpose of flowing the air smoothly via the air-flowing part220thereby maximizing the cooling performance.

Subsequently, the lamp using LED1000according to the present invention has an advantage that the heat generated from the light emitting diode110can be dissipated to the outside by causing the air to flow thorough the air-flowing part220of the lamp using LED1000during upward and downward movement of the air due to the air temperature change.

FIGS. 3 to 6show that the body200is round-shaped and five air-flowing portions220are formed with a circular sector (a shape a vertex of the circular sector and a part adjacent to it are omitted) and have a plurality of hollow-holes221.

FIG. 7is a drawing showing various shapes of the body200.FIG. 7(a) shows an example that the body is round-shaped and the air-flowing part220is formed in a center portion to allow the heat in the center part to be cooled, in a case that the body200of large area is formed.

FIGS. 7(b) and7(c) show examples that the body200is approximately rectangular-shaped, in whichFIG. 7(b) shows an example that the air-flowing part220is formed in one region of the center andFIG. 7(c) shows an example that the air-flowing portions220are formed respectively in four regions.

Besides the examples shown in the Figures, the lamp using LED1000according to the present invention can be structured such that a region in which the air-flowing part220is formed, and the shape and the number of the hollow-hole221are variously changed, considering the environment in which the lamp using LED1000is equipped and an amount of heat-dissipation of the light emitting diode110.

The lamp using LED1000according to the present invention can further include a heat pipe500between the body200and the substrate100to improve the heat-dissipation performance.

Particularly, the heat pipe500is enabled to make the total temperature distribution even and improve the heat-dissipation performance by enabling the heat of the center to be transferred in a lateral direction, in a case that the body200of large area is formed.

The heat pipe500can be equipped in various shapes andFIGS. 3 to 5show an example that the heat pipe500is extended from the center part of the body200into the lateral direction so that it may be adjacent to the air-flowing part220.

FIG. 6shows an example that a predetermined area of the heat pipe500is located in the air-flowing part220. It is shown that the heat pipe500is located to cause the air-flowing part220to be separated into two groups as shown. The lamp using LED1000according to the present invention includes, but not limited to this example, all examples of such a type that the predetermined area of the heat pipe500is located in the air-flowing part220.

Since the air-flowing part220is located in the predetermined area of the heat pipe500, the heat pipe500can be directly cooled by the air flowing through the air-flowing part220and therefore the temperature of the working fluid is lowered to enable the cooling performance to be improved.

Preferably, the body200has a setting part230of concave type formed to cause the heat pipe500to be set easily.

The body200is structured such that one side thereof is faced to the substrate100, the setting part230is formed to set the heat pipe500on the one side of the body200faced to the substrate100and the heat sink210is formed on the other side to dissipate the heat easily.

If the heat pipe500is provided as shown inFIG. 6, the hollow-holes221composing the air-flowing part220are separated into two groups so that the heat pipe500may be easily set between two groups.

Subsequently, since the lamp using LED1000according to the present invention has the heat sink210and the air-flowing part220formed in the body200and further has the heat pipe500, there are advantages that it is possible to ensure sufficient heat-dissipation performance, radiate the light stably by applying the light emitting diode110to the illuminating device of large scale and high output, and ensure even cooling throughout the lamp using LED1000to improve the durability.

Particularly, since the plurality of light emitting diodes110is provided in wide flat-type substrate, there is an advantage that applied to the high-output lamp using LED1000.

According to the present invention, it is possible to provide a lamp using LED1000which has an air-flowing part formed in a body200and is equipped with a heat pipe500to make higher a heat-conductive efficiency and thereby to make higher a heat-generation performance considerably so that the light emitting diode110can be applied to a high-output illumination device to increase a life-time.