CN201038186Y - A high power LED - Google Patents

Abstract

The utility model is a high-power LED, which includes a transparent cover, a chip, a base, an electrode sheet and a heat sink. In the hole, it is characterized in that the inner wall of the through hole and the heat sink form a lamp cup, the chip is located in the lamp cup and is closely attached to the heat sink, and one end of the electrode sheet of each polarity has at least two electrode sheets, Heat is dissipated through both the heat sink and the electrode pads. The utility model is characterized in that cheap materials are used, and at the same time, the thermal resistance of the heat dissipation system is reduced, which not only achieves the purpose of heat dissipation but also saves costs.

Description

A high power LED

technical field

The utility model belongs to the field of lighting fixtures, in particular to a high-power LED.

Background technique

Light-emitting diodes (LEDs) have been widely used as lighting fixtures. In order to pursue more ideal lighting effects, increasing the power of light-emitting diodes is the most common and economical method. However, as the power of the light-emitting diode increases, its heat generation becomes more serious. The heating of light-emitting diodes has a very negative impact on its luminous efficiency and service life. Therefore, at this stage, people have made many different attempts to dissipate heat from light-emitting diodes. The existing solutions basically use metals with good heat dissipation performance to dissipate heat for LEDs, such as using all-metal lamp holders, and adding heat dissipation blocks, etc. Although there are certain effects, such methods are too costly and have many heat dissipation media. And very troublesome for the processing production technology of metal, be not suitable for mass production. For the heat dissipation of LEDs, the thermal resistance of the heat dissipation system is a key point, and reducing the heat dissipation medium has an obvious effect on reducing the thermal resistance. Therefore, only using materials with good thermal conductivity is not the most effective and economical method, but reducing the thermal resistance of the heat dissipation system is the most effective means.

Contents of the invention

The purpose of the utility model is to provide a high-power LED with low thermal resistance, good heat dissipation effect, simple production process and low cost, so as to solve the above-mentioned existing technical problems.

The utility model is a high-power LED, which includes a transparent cover, a chip, a base, an electrode sheet and a heat sink. In the hole, it is characterized in that: the inner wall of the circular through hole and the heat sink form a lamp cup, the chip is located in the lamp cup and is closely attached to the heat sink, and one end of the electrode sheet of each polarity has at least two Divided electrodes.

The chip is located on the axis of the circular through hole forming the lamp cup.

A reflective layer is provided on the inner wall of the circular through hole constituting the lamp cup.

The electrode sheets are divided into two polarities, positive and negative, and are connected to both sides of the base according to their polarities, and are in the same plane as the heat sink.

The electrode sheets of the same polarity in the electrode sheets have two sub-electrode sheets at one end, that is, the entire electrode sheet has four sub-electrode sheets.

A wire is connected between the chip and each sub-electrode sheet according to its polarity.

There is a concave hole on the side wall of the base, and an annular lug is arranged on the side wall of the transparent cover, and the annular lug is matched with the above concave hole.

There is a boss inside the base, and the top surface of the boss is flush with the bottom surface of the above-mentioned concave hole.

The chip in the lamp cup is covered with a mixture of fluorescent powder and silica gel.

After the utility model adopts the above-mentioned scheme, its structure is very simple, and both the transparent cover and the base can be made directly in the mould, using relatively cheap plastic materials, so the production process is also simple, the cost is low, and it is suitable for mass production; more The important point is that after adopting the above-mentioned LED structure, it has less heat dissipation medium and small thermal resistance. After testing, its thermal resistance is below 10K/W (K/W), so its heat dissipation effect is good. The utility model is characterized in that cheap materials are used, and at the same time, the thermal resistance of the heat dissipation system is reduced, which not only achieves the purpose of heat dissipation, but also saves costs.

Description of drawings

Fig. 1 is the exterior view of the utility model;

Fig. 2 is the exploded schematic view of the utility model;

Fig. 3 is the schematic diagram of base in the utility model;

Fig. 4 is A-A sectional view among Fig. 1;

Fig. 5 is a top view of the electrode sheet and the heat sink of the present invention.

Detailed ways

As shown in FIGS. 1 and 2 , the utility model includes a transparent cover 1 , a base 2 , a chip 3 , electrode sheets 4 and cooling fins 5 . As shown in Figure 2 and Figure 4, the transparent cover 1 is a hemispherical shape with a certain radian inside, so that it can refract light at a certain angle, and there are annular lugs 11 on the two side walls; as shown in Figure 2 and Figure 3 As shown in , the base 2 is in the shape of a cup and bowl as a whole, with a circular through hole 23 at its center, two concave holes 21 on the side wall, and four bosses 22 near the side wall in the base; as shown in Figure 5 As shown, the electrode sheet 4 located at one end of the base 2 is divided into two sub-electrode sheets, the heat sink 5 has a circular part 51 in the middle, and a square part 52 extending on both sides.

Both the transparent cover 1 and the base 2 are made of plastic, and are molded at one time through a special mold. While the base 2 is being formed, the electrode sheet 4 and the heat sink 5 are placed in the mold. After the base 2 is formed, the electrode sheet 4 and the heat sink 5 are all embedded in the base 2, as shown in Fig. 1 and Fig. 2 structure shown. The radius of the circular part 51 in the middle of the heat sink 5 is consistent with the radius of the circular through hole 23 on the base 2, the circular part 51 of the heat sink 5 is stuck in the circular through hole 23, and its square part 52 runs through On the inner wall of the circular through hole 23, the heat sink 5 and the inner wall of the circular through hole 23 form a lamp cup, and the chip 3 is located in the lamp cup and closely attached to the heat sink 5, as shown in FIG. 2 . The transparent cover 1 is covered on the base 2, and the lugs 11 on both sides of the transparent cover 1 are covered in the concave holes 21 matched with the lugs 11 on the base 2, and the remaining edges are covered by the four holes in the base 2. On the boss 22, in order to make the transparent cover 1 cover on the base 2 smoothly, so when making the base 2, ensure that the bottom surface of the concave hole 21 and the top surfaces of the four bosses 22 are in the same plane.

The utility model has two main and auxiliary heat dissipation paths. The main way is to transfer heat to the outside through the heat sink 5 , and the secondary way is to dissipate heat through the electrode piece 4 . In the first way, the heat-generating chip 3 is closely attached to the heat sink 5, and the heat sink 5 can be attached to other supports with good heat conduction to conduct heat; in the second way, the electrode sheets on both sides of the base 2 are separated It is two sub-electrodes, and the sub-electrodes and the heat sink 5 are located in the same plane, as shown in Figure 5, and then the chip 3 and the electrode 4 are connected according to the polarity with a wire 6 with good thermal conductivity, and the chip 3 generates The heat is conducted to the electrode sheet 4 through the wire 6, and then dissipated by the electrode sheet 4. The electrode sheet 4 is divided into two sub-electrode sheets to increase the heat dissipation area. In addition, for a better heat conduction effect, the sub-electrode sheets at one end are connected to the corresponding poles on the chip 3 by multiple wires 6. One sub-electrode sheet of the utility model The electrode sheets are respectively connected to the chip 3 using two wires 6 , that is, a total of four wires are used to connect to enhance the heat transfer effect. The above structure makes the utility model have excellent heat dissipation effect, and the thermal resistance of the heat dissipation system of the utility model can reach below 10K/W (K/W) after testing.

In order to achieve a better light effect, the utility model also takes a series of corresponding measures. Firstly, the transparent cover 1 has a certain radian, so that the light is refracted at a certain angle and then emerges; secondly, the utility model is also electroplated with a reflective layer 231 on the inner wall of the circular through hole 23, so that a part of the light emitted to the side can be reflected. to the transparent cover 1; moreover, in order to make the light effect better, the utility model sets the chip 3 at the center of the heat sink 5, that is, on the axis of the circular through hole 23; finally, the chip 3 is also covered with A mixture of phosphor powder and silicone for added glow and diffused light.

The utility model has simple production process and low cost, and also reduces the thermal resistance of the heat dissipation system, which not only achieves the purpose of heat dissipation but also saves costs, and is suitable for mass production.

Claims (8)

1. great power LED, comprise translucent cover, chip, pedestal, electrode slice and fin, it is bowl-shape that said base is cup, there is a manhole in its centre, and above-mentioned fin is characterized in that in described through hole: described manhole inwall and fin are formed a Lamp cup, chip is positioned at this Lamp cup and is close on the fin, and electrode slice one end of described each polarity has at least two sub-electrode sheets.

2. great power LED according to claim 1 is characterized in that: described chip is positioned on the axis of the manhole that constitutes above-mentioned Lamp cup.

3. great power LED according to claim 1 is characterized in that: have reflector layer on the manhole inwall of the above-mentioned Lamp cup of described formation.

4. great power LED according to claim 1 is characterized in that: described electrode slice is divided into positive and negative two polarity, and is connected the both sides of pedestal by its polarity, and with fin in same plane.

5. great power LED according to claim 4 is characterized in that: electrode slice one end of same polarity has two sub-electrode sheets in the described electrode slice, and promptly the entire electrode sheet has four sub-electrode sheets.

6. great power LED according to claim 5 is characterized in that: all have a lead to be connected by its polarity between described chip and each sheet sub-electrode sheet.

7. great power LED according to claim 1 is characterized in that: on the sidewall of described pedestal shrinkage pool is arranged, on the sidewall of translucent cover annular ledge is arranged, this annular ledge and above-mentioned shrinkage pool are complementary.

8. great power LED according to claim 7 is characterized in that: in the described pedestal boss is arranged, the end face of this boss is concordant with the bottom surface of above-mentioned shrinkage pool.

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