WO2011025235A2

WO2011025235A2 - Led fluorescent lamp

Info

Publication number: WO2011025235A2
Application number: PCT/KR2010/005658
Authority: WO
Inventors: 윤인숙; 성정화
Original assignee: Yoon In Suk; Sung Jung Hwa
Priority date: 2009-08-27
Filing date: 2010-08-24
Publication date: 2011-03-03
Also published as: KR100963083B1; WO2011025235A3; JP2013503434A

Abstract

Provided is an LED fluorescent lamp. The LED fluorescent lamp comprises: a heatsink which has a set length and has a semicircular shape formed with attachment recessed parts at both ends; a diffusion tube which has a set length and has a semicircular shape of which both ends couple by hooking onto the attachment recessed parts; and an LED substrate which has a set length, and of which the two side parts are inserted and secured in securing recessed parts formed on the insides at both ends of the heatsink, and in a plurality of positions on the upper surface of which LEDs are mounted in such a way as to be exposed to the diffusion tube. Consequently, the present invention allows easy hooking attachment and detachment of the heatsink body and the diffusion tube having a set length and having a semicircular shape, and, in addition, the light emanating from the LEDs can be uniformly diffused, and the heat generated from the substrate which has a set length and from the LEDs mounted on the substrate can be rapidly discharged to the outside.

Description

LED Fluorescent Tube

The present invention relates to a heat sink, and more particularly, a semicircular diffusion tube having a predetermined length and a heat sink body can be easily detachably hooked, and also uniformly diffuse the light emitted from the LED, The present invention relates to a LED fluorescent lamp capable of rapidly dissipating heat generated from a substrate having a predetermined length and LEDs mounted on the substrate to the outside.

Most commonly used luminaires use fluorescent lamps, and the conventional fluorescent lamps are driven using a frequency of 60 Hz, so that the user may experience a lot of eye fatigue when using the lamp for a long time due to flickering 60 times per second. It causes a high power loss by increasing the ambient temperature due to the heat generated by itself during long time use, there is a disadvantage that the fluorescent lamp is easily broken when overheated. As a result, conventional lighting fixtures such as fluorescent lamps have a problem in that the service life is shortened due to the temperature rise and the high power loss, and the replacement parts are expensive due to the large number of parts used.

In addition, in recent years, a compact lamp having a length of 1/2 to 1/3 compared to a general fluorescent lamp is used. The compact fluorescent lamp has the same brightness as that of the fluorescent lamp but reduces power consumption. Excellent color reproduction characteristics.

LED, which is used as a replacement for fluorescent lamps and fluorescent lamps, has an excellent efficiency of converting electric power into light, and has a high efficiency of light per unit power compared to incandescent lamps, fluorescent lamps, and compact fluorescent lamps, which are currently used. This is excellent, and the amount of light as desired can be obtained even at low voltage, so the stability is excellent, so the use for lighting is gradually increasing.

However, the LED has a high efficiency of converting power to light, but the light emitting part is composed of semiconductor elements, so it is relatively weak to heat compared to light emitting devices such as incandescent lamps using filaments or fluorescent lamps or fluorescent lamps using cathode rays. have. In other words, the LED is easily degraded due to thermal stress caused by self-heat generated from the light emitting device when the LED is used for a long time, thereby degrading its performance.

Therefore, in recent years, in order to send a large amount of current to the LED, a heat dissipation structure for effectively dissipating heat generated therefrom is required.

In addition, in order to replace a light source such as an LED in the conventional fluorescent lamp, there is also a problem that it is difficult to easily perform the airborne operation such as replacing the light source in a narrow space coupled to the sliding type.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to easily remove the semi-circular-shaped diffusion tube and heat sink body having a predetermined length by hook type, and to have a substrate having a predetermined length and The present invention provides an LED fluorescent lamp that can quickly release heat generated from LEDs mounted on a substrate to the outside.

Another object of the present invention is to provide an LED fluorescent lamp that can dissipate heat of the substrate itself to the outside by fixing half of the fluorescent lamp as a heat sink and fixing a substrate made of a metal to the heat sink.

It is still another object of the present invention to thermally dissipate internal heat primarily by using a second heat dissipation member formed inside an LED fluorescent lamp having a predetermined length, and to dissipate the heat secondly by using a first heat dissipation member formed externally. To provide an LED fluorescent lamp that can be.

Still another object of the present invention is to provide an LED fluorescent lamp which can uniformly diffuse light emitted from the LEDs to the outside through the diffusion tube.

The present invention, LED fluorescent lamp for solving the above problems has a predetermined length, semi-circular heat sink is formed in the groove grooves at both ends; A semicircular diffusion tube having a predetermined length and having both ends hooked to the engaging groove; And an LED substrate having a predetermined length and having both sides fitted into and fixed to a fixing groove formed at both ends of the heat sink, and having LEDs mounted at a plurality of positions on the upper surface to be exposed to the diffusion tube.

The heat sink may include a semi-circular heat sink body, first heat dissipation protrusions protruding at a predetermined interval on an outer circumference of the heat sink body, and protruding at a predetermined interval on an inner circumference of the heat sink body. It is preferable to have two heat radiating protrusions.

The length of the first heat dissipation protrusions may be longer than a length of the second heat dissipation protrusions.

In addition, the first heat dissipation protrusions and the second heat dissipation protrusions may be positioned to be offset from each other.

In addition, at least one of an outer circumference and an inner circumference of the heat sink body may further include embossed first protrusions, and further embossed second protrusions may be formed on an outer surface of the first heat dissipation protrusion and the second heat dissipation protrusion. It is desirable to be.

In addition, the heat sink may be made of foamed aluminum, and an outer surface of the heat sink may be sanded.

On the other hand, the thickness of the diffusion tube is preferably formed to gradually increase from the edge portion along the center portion.

Here, the diffusion tube is preferably further provided with embossed diffusion protrusions.

The diffusion protrusions may be formed on at least one of an outer surface and an inner surface of the diffusion tube.

In addition, the diffusion protrusions are preferably formed to gradually increase in size from the edge of the diffusion tube along the center portion.

In addition, the LED substrate is preferably made of any one of metal, clad metal and FR4.

In addition, the outer surface of the LED substrate and the outer surface of the heat sink is preferably further coated with a cooling paint using a white PSR.

In addition, it is preferable that the inclined surface which guides the both ends of the diffusion tube to be slip-fitted is further formed in the locking groove portion.

The present invention has the effect of quickly dissipating heat generated from the substrate having a predetermined length and the LEDs mounted on the substrate to the outside.

In addition, the present invention has the effect of dissipating heat of the substrate itself to the outside by using a half of a fluorescent lamp as a heat sink and fixing a substrate made of metal to the heat sink.

In addition, the present invention can primarily heat the internal heat by using the second heat radiation member formed inside the LED fluorescent lamp having a predetermined length, and the heat can be secondarily radiated using the first heat radiation member formed on the outside. Has the effect.

In addition, the present invention has an effect that can uniformly diffuse the light emitted from the LEDs to the outside through the diffusion tube.

1 is a perspective view showing the LED fluorescent lamp of the present invention.

Figure 2 is an exploded perspective view showing the LED fluorescent lamp of the present invention.

Figure 3 is a front view showing the LED fluorescent lamp of the present invention.

4 is a cross-sectional view showing the LED fluorescent lamp of the present invention.

5A through 5E are partial cross-sectional views illustrating the LED substrate of FIG. 2 and are cross-sectional views illustrating a mounting process of the LED.

6 is a partial cross-sectional view showing that the LED according to the present invention is mounted in the LED mounting groove by wire bonding.

7 is a cross-sectional view illustrating a state before coupling of the heat sink and the diffusion member of FIG. 2.

8 is a cross-sectional view illustrating a state after coupling of the heat sink and the diffusion member of FIG. 7.

9 is a cross-sectional view showing a diffusion member in which a diffusion protrusion according to the present invention is formed.

Hereinafter, the LED fluorescent lamp of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing the LED fluorescent lamp of the present invention. Figure 2 is an exploded perspective view showing the LED fluorescent lamp of the present invention. Figure 3 is a front view showing the LED fluorescent lamp of the present invention. 4 is a cross-sectional view showing the LED fluorescent lamp of the present invention. 5A through 5E are partial cross-sectional views illustrating the LED substrate of FIG. 2 and are cross-sectional views illustrating a mounting process of the LED. 6 is a partial cross-sectional view showing that the LED according to the present invention is mounted in the LED mounting groove by wire bonding. 7 is a cross-sectional view illustrating a state before coupling of the heat sink and the diffusion member of FIG. 2. 8 is a cross-sectional view illustrating a state after coupling of the heat sink and the diffusion member of FIG. 7. 9 is a cross-sectional view showing a diffusion member in which a diffusion protrusion according to the present invention is formed.

1 to 4, the LED fluorescent lamp of the present invention has a semicircular heat sink 100 having a predetermined length and a diffusion tube coupled to the heat sink 100 and having a predetermined length and forming a semicircular shape ( 200 and an LED substrate 400 having a predetermined length and mounted with LEDs (not shown) and fixed to the heat sink 100.

The heat sink 100 includes a semicircular heat sink body 110, first heat dissipation protrusions 120 protruding at a predetermined interval on an outer circumference of the heat sink body 110, and the heat sink body ( The second heat dissipation protrusions 130 are formed to protrude at a predetermined interval on the inner circumference of the 110.

Here, the both ends of the heat sink body 110 has a locking groove 112 to protrude to the outside. The locking groove 112 is a groove to which both ends of the diffusion tube 200 are hooked.

And, both ends of the diffusion tube 200 may be formed with a locking projection 210 protruding outward. The locking protrusion 210 is a protrusion that is hooked into the locking groove 112 and a predetermined curvature may be formed on an outer surface thereof. At this time, both ends of the diffusion tube 200 is formed with a coupling hole 210a adjacent to the locking protrusion 210. The coupling hole 210a is a hole into which the protrusion 112a formed at the upper end of the locking groove 112 is fitted.

In addition, the locking groove 112 may be formed with an inclined surface 112a for guiding the locking protrusion 210 to be fitted therein.

Therefore, the diffusion tube 200 may be coupled to the locking groove 112 of the heat sink 100 at both ends of the diffusion tube 200 at a position facing the heat sink 100. .

In the heat sink 100, the length of the first heat dissipation protrusions 120 may be longer than a length of the second heat dissipation protrusions 130. That is, the lengths of the first heat dissipation protrusions 120 and the second heat dissipation protrusions 130 may be different from each other.

Of course, when the position where the heat is concentrated locally on a predetermined portion of the heat sink body 110 is confirmed in advance, the first heat dissipation protrusion 120 or the second heat dissipation protrusion 130 at a position corresponding to the heat concentration portion is confirmed. ) May be longer than a certain length.

In addition, the corner portions of the first heat dissipation protrusions 120 and the second heat dissipation protrusions 130 may be formed to be rounded.

Accordingly, an area of contact with air outside the heat sink body 110 may be increased by the first heat dissipation protrusions 120, and the heat sink body (the heat sink body) may be increased by the second heat dissipation protrusions 130. The area of contact with air in the interior of 110 may be increased.

In addition, fixing grooves 113 are formed at both ends of the heat sink body 110, and both ends of the LED substrate 400 on which the LEDs 40 are mounted may be fixed to the fixing groove 113. . In addition, the substrate 400 may be made of any one of metal, clad metal, and FR4. In addition, although not shown in the drawings, a predetermined shape, preferably radial projections may be further formed on the upper surface of the substrate 400 for heat dissipation.

Accordingly, since the LED substrate 400 may be in physical contact with the heat sink body 110, even when a predetermined amount of heat is generated in the substrate 400 when the LEDs 40 emit light, the heat is generated. The heat sink body 110 can be easily transferred and radiated.

In addition, an upper surface of the LED substrate 400 may form substantially the same line as a portion where the engaging protrusion 210 of the diffusion tube 200 is formed.

In addition, the first heat dissipation protrusions 120 and the second heat dissipation protrusions 130 may be positioned to be offset from each other. Accordingly, the area of the heat sink body 110 which is in contact with the air in the inside and outside of the heat sink may be increased and the heat may be complemented with each other.

In addition, at least one of the outer circumference and the inner circumference of the heat sink body 110 may further include embossed first protrusions a. Here, the first protrusions (a) may be formed only on the outer circumference or only the inner circumference of the heat sink body 110, or may be formed on both the outer circumference and the inner circumference. In addition, although not shown in the drawings, the shapes of the first protrusions (a) may be formed of polygonal protrusions in addition to the embossing shape.

The embossed

second protrusions

111 and 114 may be further formed on the outer surfaces of the first heat dissipation protrusion 120 and the second heat dissipation protrusion 130. The

second protrusions

111 and 114 may include protrusions 114 formed on the outer surface of the first heat dissipation protrusion 120 and protrusions 111 formed on the outer surface of the second heat dissipation protrusion 130. Can be.

This is to maximize the contact area between the outer periphery of the heat sink body 110 and the air therein. That is, the heat inside the heat sink body 110 can be easily radiated from the inner surface and the outer surface of the heat sink body 110.

In the present invention, the following method may be proposed as a method for maximizing the contact area with the air of the heat sink 100.

First, the heat sink 100 is made of foamed aluminum, and second, the outer surface of the heat sink 100 is sanded (or etched). Therefore, since the porous aluminum is used in the case of using foamed aluminum, the contact area with air in the heat sink body 110 itself can be increased, and in addition, by etching or sanding the outer surface of the heat sink 100. Roughness may be formed on the outer surface to further increase the contact area with air.

Meanwhile, referring to FIGS. 7 and 8, the diffusion tube 200 hooked with the heat sink body 110 has a predetermined length, and a cross-sectional shape thereof is formed in a semicircular shape. Then, both ends of the diffusion tube 200 is formed with a locking projection 210 as mentioned above, the locking projection 210 is formed in the locking groove 112 formed at both ends of the heat sink body 110. It is hooked and fixed.

In addition, referring to FIG. 9, the thickness of the diffusion tube 200 may be formed to gradually increase from the edge to the center when viewed in the shape of a cross section.

Thus, the amount of light emitted from the LEDs 40 is controlled to be much less outside the center portion outside the center portion, so that the amount of light emitted outside the diffusion tube 200 as a whole can be evenly distributed.

In addition, the diffusion tube 200 may further include diffusion protrusions 220 having an embossed shape.

The diffusion protrusions 220 may be formed on at least one of an outer surface and an inner surface of the diffusion tube 200. Preferably it is formed on the inner surface of the diffusion tube 200 as shown in FIG.

Therefore, the light emitted from the LEDs 40 may be uniformly diffused to the outside of the diffusion tube 200.

In addition, as mentioned above, in FIG. 9, the diffusion protrusions 220 may be formed to gradually increase in size from the edge of the diffusion tube 200 along the center portion. This is because the amount of light delivered to the center portion and the amount of light delivered to the edge portion are different from each other, and thus, the degree of diffusion of light diffused to the outside of the diffusion tube 200 may be uniform.

In addition, the radiation angle of the light emitted from the LEDs 40 due to the diffusion protrusions 220 formed in the diffusion tube 200 may be increased to about 280 degrees with respect to the center of the LED substrate 400.

In addition, by manufacturing the thickness of the diffusion tube 200 as mentioned above, it is also possible to reduce the weight of the diffusion tube 200 itself.

The LED substrate 400 according to the present invention may generate more than a predetermined heat due to the light emitted from the LEDs 40, which may be cooled by a cooling paint.

That is, this may be achieved by further applying a cooling paint using white PSR to the outer surface of the LED substrate 400 and the outer surface of the heat sink 100.

In addition, by applying the cooling paint to the outer surface of the LED substrate 400 and the heat sink 100 can reduce the noise generated in the LED substrate 400. Therefore, the light emitted from the LEDs 40 may emit stable light to the outside because noise is reduced to some extent.

Also, referring to FIGS. 5A to 5E, the LEDs 40 mounted on the LED substrate 400 may be inserted into the LED substrate 400 to be mounted.

That is, the LED installation grooves 420 are formed by routers at a plurality of positions of the substrate body 410 of the LED substrate 400. The electrode 30 is formed on the bottom surface 4222 of the LED installation groove 420. In addition, the LEDs 40 may be located in the LED installation grooves 420 and may be mounted by any one of the ball grid array 42 and the wire bonding 43.

Subsequently, the LED installation groove 420 may be filled with a filler 430 in which silicon and phosphors are mixed at a predetermined ratio. The top surface of the filler 430 may form the same line as the top surface of the LED substrate 400.

This may easily reduce the thickness of the LED substrate 400 and may safely protect the LEDs 40 from the external environment.

In addition, when the LED substrate 400 has a dimming circuit, the LED substrate 400 may adjust the amount of light of the LEDs 40 to a predetermined value.

In addition, radially annular protrusions (not shown) may be further formed on an outer surface of the opposite LED substrate 400 on which the LEDs 40 are mounted. This serves to dissipate heat generated from the LED substrate 400 itself.

Here, reference numeral 421 denotes both side walls of the LED installation groove 420. '430' is a filler in which silicon and phosphors are mixed at a predetermined ratio.

In addition, although not shown in the drawing, a plurality of annular protrusions (not shown) may be further formed on the upper surface of the LED substrate 400. Here, the annular protrusions are made of the same material as that of the LED substrate 400 as well as being integral with the LED substrate 400. In particular, in the present invention, the LED substrate 400 is preferably made of a clad metal.

The above-mentioned clad metal will be described as follows.

The clad metal refers to a material in which two or more layers of metals or nonmetals are bonded together, that is, a heterojunction metal. This has the advantage that it can be adapted to the special needs by supplementing various properties which cannot be obtained with a single metal.

For example, the example which carried out heterojunction with copper-aluminum-copper, copper-stainless-copper etc. is mentioned.

As described above, in the detailed description of the present invention has been described with respect to preferred embodiments of the present invention, those skilled in the art to which the present invention pertains various modifications can be made without departing from the scope of the invention Of course.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

The present invention can be used in the field of manufacturing LED fluorescent lamps.

Claims

A semicircular heat sink having a predetermined length and having locking grooves at both ends thereof;

A semicircular diffusion tube having a predetermined length and having both ends hooked to the engaging groove; And

An LED fluorescent lamp having an LED substrate having a predetermined length and having both sides fitted into and fixed to a fixing groove formed inside both ends of the heat sink, and having LEDs mounted at a plurality of positions on the upper surface to be exposed to the diffusion tube.
The method of claim 1,

The heat sink has a semicircular heat sink body, first heat dissipation protrusions protruding at a predetermined interval on an outer circumference of the heat sink body, and second heat dissipation protruding at a predetermined interval on an inner circumference of the heat sink body. LED fluorescent lamp comprising projections.
The method of claim 2,

LED fluorescent lamp, characterized in that the length of the first heat radiation projections are formed longer than the length of the second heat radiation projections.
The method of claim 2,

And the first heat dissipation protrusions and the second heat dissipation protrusions are positioned to be offset from each other.
The method of claim 2,

Embossed first protrusions are further formed on at least one of an outer circumference and an inner circumference of the heat sink body,

LED fluorescent lamp, characterized in that the embossed second projections are further formed on the outer surface of the first heat dissipation protrusion and the second heat dissipation protrusion.
The method of claim 1,

The heat sink is made of foamed aluminum,

LED fluorescent lamp, characterized in that the outer surface of the heat sink is sanded.
The method of claim 1,

The thickness of the diffusion tube LED fluorescent lamp characterized in that it is formed to increase gradually from the edge portion along the center portion.
The method of claim 1,

The diffusion tube further comprises an embossed diffusion projections LED fluorescent lamp.
The method of claim 8,

LED diffuser is formed on at least one of the outer surface and the inner surface of the diffusion tube.
The method of claim 8,

And the diffusion protrusions are formed to gradually increase in size from an edge portion of the diffusion tube along a center portion thereof.
The method of claim 1,

The LED substrate is an LED fluorescent lamp, characterized in that made of any one of metal, clad metal and FR4.
The method of claim 1,

The LED fluorescent lamp further comprises a cooling paint using a white PSR on the outer surface of the LED substrate and the outer surface of the heat sink.
The method of claim 1,

LED hangers, characterized in that the inclined surface is further formed to guide so that both ends of the diffusion tube is slipped and fitted.