CN201992446U - High-efficiency LED bulbs - Google Patents

Abstract

The utility model relates to a LED lamps and lanterns technique especially relates to a high light efficiency LED bulb, and it is including lamp holder, lamp shade, power, and the joint has heat dissipation metal casing between lamp holder and the lamp shade, and heat dissipation metal casing's top is located the lamp shade, and heat dissipation metal casing's top joint is fixed with the heat dissipation base plate, and the heat dissipation base plate is pegged graft and is fixed with the LED luminous column, the even interval arrangement of LED luminous column, and the LED luminous column is for the rotatory placement in heat dissipation base plate center. Because the utility model discloses the LED luminous column is placed for the rotation of radiating basal plate center, consequently, can avoid most light between the LED luminous column to offset each other, makes the light that the LED luminous column sent obtain abundant utilization to improve the luminance of whole LED bulb, realize high light efficiency LED bulb.

Description

High-efficiency LED bulbs

technical field

The utility model relates to the technology of LED lamps, in particular to an LED light bulb with high light efficiency.

Background technique

Because LED (Light Emitting Diode, light-emitting diode) has the characteristics of long service life, low energy consumption, and remarkable energy saving, LED has been widely used as a light source in daily life, such as cup lights, spotlights, car lights, LED Light bulbs and other LED lighting fixtures.

At present, LED light bulbs generally include a lamp cap, a lampshade installed on the top of the lamp cap, and a power supply located in the lamp cap. An LED light-emitting column is arranged in the lampshade. The LED light-emitting column is electrically connected to the power supply in the lamp cap, and the LED light-emitting column is fixed on the heat dissipation substrate. When the LED light-emitting column is energized to emit light, the light emitted by it can be irradiated through the lampshade to achieve the purpose of lighting or decoration.

However, as shown in FIG. 1 , most of the LED luminous columns 101 of LED bulbs in the prior art are perpendicular to the connecting line 103 between its center line and the center of the heat dissipation substrate 102 , that is, the angle between the connecting line 103 and the LED luminous column 101 is 90°. The arrangement of the LED luminous columns 101 of this LED light bulb on the heat dissipation substrate 102 makes the LED luminous columns 101 face the center of the heat dissipation substrate 102. As shown in FIG. 2, when the LED luminous columns 101 emit light, their direction Most of the light rays in the center of the heat dissipation substrate 102 will cancel each other, thereby reducing the brightness of the entire LED bulb, that is, the light efficiency of the LED bulb is not high.

Contents of the invention

The purpose of the utility model is to provide a high-luminous-efficiency LED light bulb with improved brightness by rotating and placing the LED light-emitting column relative to the center of the heat-dissipating substrate to address the shortcomings of the prior art.

The purpose of this utility model is achieved through the following technical measures: a high-luminous-efficiency LED light bulb, which includes a lamp cap, a lampshade, and a power supply. A heat-dissipating metal shell is clamped between the lamp cap and the lampshade. The top of the metal shell is clamped and fixed with a heat dissipation substrate, and the heat dissipation substrate is plugged and fixed with LED luminous columns, the LED luminous columns are arranged at even intervals, and the LED luminous columns are rotated relative to the center of the heat dissipation substrate.

The angle between the center line of the LED luminous column and the center of the heat dissipation substrate is an acute angle with the LED luminous column.

The included angle is 45 degrees.

The angle at which the LED luminous column is inclined relative to the vertical direction is 15 degrees.

The heat dissipation substrate is circular.

The LED luminous column includes two PCB (printed circuit board) substrates, LED chips are packaged on the front of the two PCB substrates, the LED chips are electrically connected to the PCB substrate, the PCB substrate is electrically connected to the power supply, and the backs of the two PCB substrates are connected to each other. Closely fixed, and a heat dissipation metal sheet is sandwiched between the backs of the two PCB substrates.

The heat dissipation metal sheet is a copper sheet, the area of the side of the heat dissipation metal sheet is greater than the area of the back of the PCB substrate, and the heights of the LED chips of the two PCB substrates are equal; wherein, the heat dissipation substrate and the PCB substrate are both heat dissipation aluminum substrates , The bottom of the PCB substrate is provided with a socket, and the two PCB substrates and the heat dissipation metal sheet of the LED luminous column are fixed by rivets.

There are two or more LED light columns.

There are four LED luminous columns.

There are five LED luminous columns.

The beneficial effect of the utility model is that: the utility model includes a lamp holder, a lampshade, and a power supply. A heat dissipation metal shell is clamped between the lamp holder and the lampshade. The substrate and the heat dissipation substrate are plugged and fixed with LED light-emitting columns, the LED light-emitting columns are arranged at even intervals, and the LED light-emitting columns are rotated relative to the center of the heat-dissipating substrate. Since the LED light-emitting columns of the utility model are placed in rotation relative to the center of the heat-dissipating substrate, most of the light between the LED light-emitting columns can be avoided from canceling each other, so that the light emitted by the LED light-emitting columns can be fully utilized, thereby improving the brightness of the entire LED bulb , to achieve high-efficiency LED bulbs.

Description of drawings

FIG. 1 is a structural schematic diagram of an LED luminous column and a heat dissipation substrate of an existing LED light bulb.

FIG. 2 is a schematic diagram of the direction of light toward the center of the heat dissipation substrate in FIG. 1 .

Fig. 3 is a schematic structural view of Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

Fig. 4 is an exploded schematic view of Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

Fig. 5 is a schematic structural view of the hidden lampshade of Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

FIG. 6 is a top view of FIG. 5 .

FIG. 7 is a schematic diagram of the direction of light toward the center of the heat dissipation substrate in FIG. 6 .

FIG. 8 is a side view of FIG. 5 .

Fig. 9 is a schematic structural view of an LED light-emitting column in Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

Fig. 10 is a side view of the LED luminous column of Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

Fig. 11 is an exploded schematic view of the LED luminous column of Embodiment 1 of a high-luminous-efficiency LED light bulb of the present invention.

Fig. 12 is a structural schematic diagram of the heat dissipation metal shell, the heat dissipation substrate and the LED luminous column of Embodiment 2 of a high-luminous-efficiency LED light bulb of the present invention.

In Fig. 3-12 include:

1——lamp holder 2——lampshade

3——Power supply 4——Heat dissipation metal shell

5——Heat Dissipation Substrate 6——LED Lighting Column

61——PCB substrate 611——socket part

612——Rivet 62——LED chip

63——radiating metal sheet 7——central line

8 - Connection.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1

A high-efficiency LED light bulb of the present utility model, as shown in Figures 3 to 11, includes a lamp base 1, a lampshade 2, and a power supply 3. The lamp cap 1 is electrically connected so that the power supply 3 can be externally connected to an alternating current through the lamp cap 1, wherein a heat-dissipating metal shell 4 is clamped between the lamp cap 1 and the lampshade 2, and the top of the heat-dissipating metal shell 4 is located in the lampshade 2, and the top of the heat-dissipating metal shell 4 The heat dissipation substrate 5 is clamped and fixed, and the heat dissipation substrate 5 is plugged and fixed with LED light-emitting columns 6. The heat generated by the LED light-emitting columns 6 can be transferred to the heat-dissipating metal shell 4 through the heat-dissipating substrate 5. The LED light-emitting columns 6 are evenly spaced, so that The distributed photometric characteristic of the whole LED light bulb is better, and the LED luminous columns 6 are rotated relative to the center of the heat dissipation substrate 5 to form a whirlwind arrangement with the center of the heat dissipation substrate 5 as the midpoint. The whirlwind arrangement at a certain angle can effectively prevent most of the light rays between the LED luminous columns 6 from canceling each other, so that the light emitted by the LED luminous columns 6 can be fully utilized.

More specifically, the angle (a) between the center line 7 of the LED luminous column 6 and the center of the heat dissipation substrate 5 (that is, the connection line 8 ) and the LED luminous column 6 is an acute angle, that is, the LED luminous column 6 is not perpendicular to line 8. In this embodiment, it is preferable that the angle (a) between the connection line 8 and the LED luminous column 6 is 45 degrees. According to the test, the LED luminous column 6 arranged in this way is better than the LED luminous column 6 arranged in the prior art. , the brightness of the entire LED light bulb can be increased by about 28%, so that the light efficiency of the entire LED light bulb is higher; moreover, because the LED light emitting columns 6 in this arrangement make full use of the light emitted by the LED light emitting columns 6, therefore, The LED luminous columns 6 arranged in this way can also improve the light distribution curve and distribution luminosity characteristics of the LED bulb. Of course, the angle between the connecting line 8 and the LED light emitting column 6 can also be other angles, not limited to 45 degrees selected in this embodiment, as long as it can improve the brightness of the LED light bulb.

The inclined angle (b) of the LED luminous column 6 relative to the vertical direction is 15 degrees, which can expand the lighting range of the LED luminous column 6 and further improve the light distribution curve and distribution photometric characteristics of the LED bulb. Of course, the angle of inclination of the LED luminous column 6 relative to the vertical direction can also be other angles, not limited to the 15 degrees selected in this embodiment, as long as it can improve the light distribution curve and distribution photometric characteristics of the LED bulb.

The heat dissipation substrate 5 is circular, so that the installation and arrangement of the LED luminous columns 6 are convenient, and the installation of parts such as the lampshade 2 and the like is coordinated. Of course, the heat dissipation substrate 5 can also be in other shapes, such as rectangle, ellipse, etc., not only It is limited to the circle selected in this embodiment.

The LED luminous column 6 includes two PCB substrates 61, and the fronts of the two PCB substrates 61 are packaged with LED chips 62, that is, the LED chips 62 are directly packaged on the PCB substrate 61, so as to reduce the volume and weight of the LED luminous column 6. The chip 62 is electrically connected to the PCB substrate 61, and the PCB substrate 61 is electrically connected to the power supply 3, so that the power supply 3 can convert AC power into DC power, and supply power to the LED chip 62 through the PCB substrate 61, and the backs of the two PCB substrates 61 are closely attached to each other and fixed , so that both sides of the LED luminous column 6 have LED chips 62, when the LED chip 62 emits light, radial light can be realized, and the light coverage is large (up to 360 degrees); wherein, the two PCBs of the LED luminous column 6 A heat dissipation metal sheet 63 is sandwiched between the back surfaces of the substrate 61. When the LED chip 62 works and emits light, a large amount of heat will be generated and accumulated on the PCB substrate 61. Therefore, the heat dissipation metal sheet 63 can dissipate the heat accumulated on the PCB substrate 61. The heat is transmitted to the heat dissipation substrate 5, and then quickly dissipated by the heat dissipation substrate 5 through the heat dissipation metal casing 4.

In this embodiment, it is preferable that the heat dissipation metal sheet 63 is a copper sheet, because the copper sheet has advantages such as high thermal conductivity, and can quickly conduct away the heat accumulated on the PCB substrate 61 , that is, the heat dissipation speed is relatively fast. Of course, the heat dissipation metal sheet 63 can also be made of other heat dissipation materials, as long as it has the advantages of high thermal conductivity; Protrude from the PCB substrate 61 to increase heat dissipation and heat conduction area; the heights of the LED chips 62 of the two PCB substrates 61 of the LED luminous column 6 are equal, so that the LED chips 62 on both sides of the LED luminous column 6 can maintain the same height to emit light, forming Point light source; the heat dissipation substrate 5 and the PCB substrate 61 are heat dissipation aluminum substrates, and the heat dissipation aluminum substrate has a good heat dissipation effect; the bottom of the PCB substrate 61 of the LED luminous column 6 is provided with a plug-in part 611, so that the LED luminous column 6 can be plugged fixed on the heat dissipation substrate 5; the two PCB substrates 61 and the heat dissipation metal sheet 63 of the LED luminous column 6 are fixed by rivets 612, more specifically, the rivets 612 pass through the two PCB substrates 61 and the heat dissipation metal sheet 63, thereby The two PCB substrates 61 and the heat dissipation metal sheet 63 are locked and fixed, so that the heat dissipation metal sheet 63 and the back of the two PCB substrates 61 are closely attached together, thereby increasing the heat dissipation area, and the utility model can increase the heat dissipation by 8-10% speed. Of course, the two PCB substrates 61 of the LED luminous column 6 can also be fixed in other ways, such as fastening and sticking, as long as the fixing effect is good.

Wherein, there are two or more LED light-emitting columns 6 , and in this embodiment, there are four LED light-emitting columns 6 to realize light emission in multiple directions.

Example 2

Embodiment 2 of a high-luminous-efficiency LED light bulb of the present utility model is shown in FIG. Columns 6 can also be other numbers such as three, six, etc., as long as they are rotated relative to the center of the heat dissipation substrate 5 to form a whirlwind arrangement with the center of the heat dissipation substrate 5 as the midpoint, and can increase the brightness of the LED bulb. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (10)

1. A high-efficiency LED light bulb, which includes a lamp cap, a lampshade, and a power supply. A heat-dissipating metal shell is clamped between the lamp cap and the lampshade. The substrate and the heat dissipation substrate are plugged and fixed with LED light-emitting columns, which are characterized in that: the LED light-emitting columns are arranged at even intervals, and the LED light-emitting columns are rotated relative to the center of the heat-dissipating substrate. 2. The high-efficiency LED light bulb according to claim 1, wherein the angle between the center line of the LED light-emitting column and the center of the heat-dissipating substrate is an acute angle with the LED light-emitting column. 3. The high-efficiency LED light bulb according to claim 2, wherein the included angle is 45 degrees. 4. The high-luminous-efficiency LED light bulb according to claim 2, characterized in that: the angle of inclination of the LED light-emitting column relative to the vertical direction is 15 degrees. 5. The high-luminous-efficiency LED light bulb according to claim 2, wherein the heat dissipation substrate is circular. 6. The high-efficiency LED light bulb according to any one of claims 1 to 5, characterized in that: the LED luminous column includes two PCB substrates, the fronts of the two PCB substrates are packaged with LED chips, and the LED chips and the PCB The substrates are electrically connected, the PCB substrates are electrically connected to the power supply, the backs of the two PCB substrates are closely attached to each other and fixed, and a heat dissipation metal sheet is interposed between the backs of the two PCB substrates. 7. The high-efficiency LED light bulb according to claim 6, characterized in that: the heat dissipation metal sheet is a copper sheet, the area of the side of the heat dissipation metal sheet is larger than the area of the back of the PCB substrate, and the LED chips of the two PCB substrates The heights are equal; wherein, the heat dissipation substrate and the PCB substrate are all heat dissipation aluminum substrates, the bottom of the PCB substrate is provided with a plug-in part, and the two PCB substrates and the heat dissipation metal sheet of the LED luminous column are fixed by rivets. 8. The high-luminous-efficiency LED light bulb according to claim 7, wherein there are two or more LED light-emitting columns. 9. The high-luminous-efficiency LED light bulb according to claim 8, wherein there are four LED light-emitting columns. 10. The high-luminous-efficiency LED light bulb according to claim 8, wherein there are five LED light-emitting columns.

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