CN206093556U - LED (Light emitting diode) light source device - Google Patents

Abstract

The utility model provides an LED light source device, comprising: a sheet-shaped substrate body; a plurality of through grooves arranged at intervals between the outer peripheral edge of the substrate body and the center of the substrate body in the direction of the line connecting the center of the substrate body. For dividing the substrate body into a plurality of interconnected substrate units, wherein the length of the through groove is smaller than the distance between the outer peripheral edge of the substrate body and the center of the substrate body, the substrate unit has a first A surface; a plurality of LED light source positions arranged at the first surface of the plurality of substrate units, for placing LED light sources; wherein, the LED light sources are LED patch light sources; wherein, each of the The substrate unit is configured to be bendable arbitrarily, so that the illuminated surface irradiated by all the LED light sources together is not lower than a preset maximum illuminated surface. The scheme of the utility model not only solves the problem of lighting dead angle and heat dissipation through the through-slot and division technology, but also improves the stability of the circuit.

Description

A kind of LED light source device

technical field

The utility model relates to the technical field of lighting devices, in particular to an LED light source device.

Background technique

The new national standard for elevators requires the lighting of shafts, pits, and car tops to reach 20LUX in most areas of the shaft. Since the elevator shaft is a vertical structure, the illuminance in the shaft should reach all directions as far as possible, especially the illumination in the vertical direction, so as to achieve the lowest number of lights to cover the entire shaft.

However, the existing LED lights generally adopt LED flat panel light sources. Since the maximum emission angle of the LED patch is generally 150°, the side light, especially the side light greater than 150°, cannot reach the front of the vertical plane. Therefore, the LED flat panel light source has problems such as lighting blind spots. In order to solve the problem of lighting dead angles, a method of increasing the number of LED lamp beads is generally adopted in the prior art. This method can reduce the range of dead angles to a certain extent, but it also brings other problems, such as increased cost, poor heat dissipation effect and short service life. In order to solve the above-mentioned heat dissipation problem, in the prior art, additional heat dissipation components are generally added, such as adding a heat dissipation plate in the lamp housing or using heat pipe technology to improve heat dissipation efficiency. However, adding additional heat dissipation components will not only increase the cost, but also increase the weight of the lamp body, and the heat dissipation efficiency has not been significantly improved.

Utility model content

The inventors of the present application found that none of the above-mentioned methods to solve the problems of lighting blind spots and heat dissipation can completely improve the lighting and heat dissipation performance of LED lamps.

One purpose of the utility model is to provide an LED light source device to solve the problems of lighting dead angle and heat dissipation.

An LED light source device of the present invention comprises:

A sheet-shaped substrate body;

A plurality of through grooves arranged at intervals in the line direction between the outer periphery of the substrate body and the center of the substrate body are used to divide the substrate body into a plurality of interconnected substrate units, wherein the substrate the unit has a first surface;

a plurality of LED light source sites arranged at the first surface of the plurality of substrate units, for placing LED light sources;

Wherein, the length of the through groove is smaller than the distance between the outer periphery of the substrate body and the center of the substrate body;

Wherein, each of the substrate units is configured to be able to be bent arbitrarily, so that the illuminated surface irradiated by all the LED light sources together is not lower than a predetermined maximum illuminated surface.

Further, the area of the through groove accounts for 20-50% of the area of the substrate body.

Further, each of the substrate units includes:

a first end, the first end being an end close to the outer periphery of the substrate unit; and

a second end opposite the first end;

Wherein, the substrate unit is configured to be bendable from the first surface of the substrate unit toward a second surface opposite to the first surface, so that the first end of the substrate unit is There is a height difference between the second ends;

Wherein, the substrate unit is shaped as a curved surface or a plane.

Further, the substrate body also includes:

a connecting portion configured to be integrally formed with the substrate unit and formed at a central position of the substrate body, for connecting a plurality of the substrate units;

Wherein, the connecting portion is connected to the second end portion of the substrate unit.

Further, the first surface of each substrate unit is bent toward the second surface to form an arc-shaped surface;

Wherein, the surface jointly formed by all the substrate units and the connection part is basically a discontinuous hemispherical surface or a semi-ellipsoidal surface.

Further, the first surface of each substrate unit is bent toward the second surface to form a slope;

Wherein, the surface jointly formed by all the substrate units and the connection part is basically a discontinuous frustum or cone.

Further, the first surface of each substrate unit is bent toward the second surface to form multiple slopes with multiple different inclinations;

Optionally, the first surface of each substrate unit is bent toward the second surface to form multiple curved surfaces with multiple different curvatures;

Optionally, the first surface of each substrate unit is bent toward the second surface to form a surface composed of an inclined surface and an arc surface.

Further, the connecting part is a curved surface or a plane.

Further, multiple LED light sources located at the same substrate unit are connected in series, and multiple LED light sources located at different substrate units are connected in parallel;

Optionally, the multiple LED light sources at all the substrate units are connected in parallel

Further, the substrate body is a metal-based copper-clad laminate.

Further, the metal-based copper-clad laminate is an aluminum-based copper-clad laminate or a copper-based copper-clad laminate.

The solution of the utility model greatly improves the heat dissipation performance of the substrate body by arranging a plurality of through slots. Through multiple tests, it is found that the area of the through groove has a significant impact on the heat dissipation performance of the substrate body, and only when the area of the through groove accounts for 20-50% of the area of the substrate body, the heat dissipation effect will be significantly improved. The substrate body generally includes a copper foil layer. However, the ductility and tensile strength of the copper foil are relatively low. Once the surface tension of the substrate body is high, the copper foil will crack, thereby affecting the service life of the LED lamp. Moreover, circuits will be etched on the copper foil layer during use. Once the copper foil is cracked, its conductivity will definitely be affected, thereby affecting the quality of the LED lamp. According to the solution of the present invention, by dividing the substrate body into multiple substrate units, the surface tension on the substrate body is greatly reduced, thereby slowing down the cracking of the copper foil, enhancing the stability of the circuit, and prolonging the service life of the LED lamp.

In addition, since each substrate unit can be bent arbitrarily, it is ensured that the illuminated surface irradiated by the LED light source can not be lower than the maximum preset illuminated surface. Therefore, the light source substrate of the present invention can realize omni-directional illumination and avoid blind lighting angles. According to the solution of the utility model, due to the ingenious use of the through groove, not only the problem of heat dissipation is solved, but also the cracking of the copper foil is avoided, and the stability of the circuit is ensured. Moreover, since the divided substrate unit can be bent arbitrarily, it has freedom and avoids dead angles of lighting. In other words, the utility model can not only solve the above-mentioned technical problems, but also bring the maximum beneficial effect through the skillful use of through-groove and splitting technology. That is, no additional cooling device is added, no LED lamp is added, and the cost is minimized. Moreover, the arrangement of the through groove reduces the weight of the substrate, and indirectly realizes the weight reduction of the LED lamp.

According to the following detailed description of specific embodiments of the utility model in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objectives, advantages and features of the utility model.

Description of drawings

Hereinafter, some specific embodiments of the present utility model will be described in detail in an exemplary rather than restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

FIG. 1 is a schematic structural view of a substrate body according to an embodiment of the present invention;

2 is a schematic perspective view of an LED light source device according to a first embodiment of the present invention;

Fig. 3 is a schematic side view of the LED light source device shown in Fig. 2;

Fig. 4 is a schematic top view of the LED light source device shown in Fig. 2;

Fig. 5 is a schematic bottom view of the LED light source device shown in Fig. 2;

6 is a schematic perspective view of an LED light source device according to a second embodiment of the present invention;

Fig. 7 is a schematic side view of the LED light source device shown in Fig. 6;

Fig. 8 is a schematic structural view of a substrate unit according to a third embodiment of the present invention.

detailed description

Fig. 1 is a schematic perspective view of an LED light source device 100 according to a first embodiment of the present invention. The LED light source device 100 may include a substrate body 110 . The substrate body 110 may be shaped in a sheet shape. FIG. 1 shows a schematic structural diagram of a substrate body 110 according to an embodiment. As shown in FIG. 1 , the substrate body 110 may generally include a metal base layer 13 , an insulation and heat conduction layer 14 and a copper foil layer 15 . Wherein, the metal base layer 13 may be aluminum base or copper base. In other embodiments, the metal base layer 13 may also be other metal bases with good thermal conductivity. It can be understood that when the metal base layer 13 is aluminum-based or copper-based, the substrate body 110 is correspondingly an aluminum-based copper-clad laminate or a copper-based copper-clad laminate.

2 to 5 respectively show a schematic perspective view, a side view, a top view and a bottom view of the LED light source device 100 according to the first embodiment of the present invention. In order to solve the problems of lighting blind spots and heat dissipation, as shown in FIG. 2 to FIG. The groove 120 is used to divide the substrate body 110 into a plurality of interconnected substrate units 11 . Wherein, the length of the through groove 120 is smaller than the distance between the outer periphery of the substrate body 110 and the center of the substrate body 110 . In one embodiment, the plurality of through grooves 120 and the plurality of substrate units 11 are alternately and equally spaced. For example, a through slot 120 may be spaced between every two substrate units 11 . The area of the through groove 120 can be selected to account for any percentage of 20-50% of the area of the substrate body 110 . Wherein, the size and shape of each substrate unit 11 are the same. Thus, the substrate body 110 may include a plurality of substrate units 11 and a connection part 12 for connecting the plurality of substrate units 11 . The connecting portion 12 is configured to be integrally formed with the substrate unit 11 and is formed at the center of the substrate body 110 . It can be understood that: the manufacturing process of the substrate body 110 is: the sheet substrate body 110 is provided with a plurality of through grooves 120 at equal intervals along the direction of the line connecting the outer peripheral edge of the substrate body 110 and the center of the substrate body 110, and then placed on the Extruded in a mold to produce the desired shape. During the extrusion molding process, the portion where multiple substrate units 11 are connected naturally becomes the connection portion 12 .

As shown in FIGS. 2 to 5 , the substrate unit 11 may include a first end portion 3 , a second end portion 4 , a first surface 1 and a second surface 2 . The first end portion 3 is an end close to the outer peripheral edge of the substrate unit 11 . The second end portion 4 is an end opposite to the first end portion 3 , which is connected with the connecting portion 12 and integrally formed. A plurality of LED light source sites 130 for placing LED light sources 140 are arranged on the first surface 1 , and the LED light source sites 130 can be reasonably arranged according to the angle principle of the utility model. The arrangement of the LED light source sites 130 follows the following principles: multiple LED light sources 140 located at the same substrate unit 11 are connected in series, and multiple LED light sources 140 located at different substrate units 11 are connected in parallel. In other embodiments, the arrangement of the LED light source sites 130 may also follow the following principle: multiple LED light sources 140 at all substrate units 11 are connected in parallel. The second surface 2 is another surface opposite to the first surface 1 . The substrate unit 11 is configured to be bent from the first surface 1 toward the second surface 2 of the substrate unit 11 so that there is a height difference between the first end 3 and the second end 4 of the substrate unit 11 . Thus, the illuminated surface illuminated by all the LED light sources 140 together may not be lower than a preset maximum illuminated surface. That is, the bending angle and shape of the bending can be adjusted according to the size of the maximum preset illumination surface. According to the first embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form an arc-shaped surface. The shapes and sizes of all substrate units 11 are consistent. Wherein, the surface jointly formed by all the substrate units 11 and the connecting portion 12 is basically a discontinuous semi-ellipsoid. In another embodiment, the surface jointly formed by all the substrate units 11 and the connecting portion 12 may also be basically a hemispherical surface.

Table 1 shows that by analyzing and comparing the data that the area of the through groove 120 occupies the area of the substrate body 110 , various values of the illumination area and heat dissipation efficiency can be obtained. When the area of the through groove 120 accounts for 20%, 30%, 40% and 50% of the area of the substrate body 110, respectively, analyze the steady-state temperature values, and calculate the heat dissipation efficiency. The data values are shown in Table 1 below.

Table 1

Area occupied by slot 120 (%) Maximum lighting area (%) Heat dissipation efficiency (%) 20 90 88 30 95 98 40 98 95 50 100 90

It can be seen from Table 1 that when the area of the through groove 120 accounts for 20%, 30%, 40% and 50% of the area of the substrate body 110, the problems of lighting blind spots and heat dissipation can basically be solved. When the area of the through groove 120 accounts for 30-40% of the area of the substrate body 110, the overall performance is the best.

In the solution of the embodiment of the present invention, the heat dissipation performance of the substrate body 110 is greatly improved due to the arrangement of a plurality of through grooves 120 . Through multiple tests, it is found that the area of the through groove 120 has a significant impact on the heat dissipation performance of the substrate body 110, and only when the area of the through groove 120 accounts for 20-50% of the area of the substrate body 110, the heat dissipation effect will be significantly improved. The substrate body 110 generally includes a copper foil layer 15. However, the ductility and tensile strength of the copper foil are relatively low. Once the surface tension of the substrate body 110 is high, the copper foil will crack, thereby affecting the service life of the LED lamp. . Moreover, circuits will be etched on the copper foil layer 15 during use. Once the copper foil is cracked, its conductivity will be affected, thereby affecting the quality of the LED lamp. According to the solution of the present utility model, by dividing the substrate body 110 into a plurality of substrate units 11, the surface tension on the substrate body 110 is greatly reduced, thereby slowing down the cracking of the copper foil, so that the stability of the circuit is enhanced, and the service life of the LED lamp is improved. extend.

In addition, since each substrate unit 11 can be bent arbitrarily, it is ensured that the illuminated surface irradiated by the LED light source 140 can not be lower than the maximum preset illuminated surface. Therefore, the light source substrate of the present invention can realize omni-directional illumination and avoid blind lighting angles. According to the solution of the utility model, due to the ingenious use of the through groove 120, not only the problem of heat dissipation is solved, but also the cracking of the copper foil is avoided, and the stability of the circuit is ensured. In addition, since the divided substrate unit 11 can be bent arbitrarily, it has freedom and avoids lighting blind spots. In other words, the utility model can not only solve the above-mentioned technical problems, but also bring the maximum beneficial effect through clever use of the through groove 120 and the division technology. That is, no additional cooling device is added, no LED lamp is added, and the cost is minimized. Moreover, the arrangement of the through groove 120 reduces the weight of the substrate, and indirectly realizes the weight reduction of the LED lamp.

Fig. 6 and Fig. 7 respectively show a schematic perspective view and a side view of an LED light source device 100 according to a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that, as shown in Fig. 6 and Fig. 7, the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form an inclined plane, and the connecting portion 12 is a circle Shaped structure, at least one LED light source site 130 can be arranged at the connecting portion 12 . Therefore, in this embodiment, the surface jointly formed by all the substrate units 11 and the connecting portion 12 is basically a discontinuous circular frustum. In another embodiment, the connecting portion 12 is circular, and its area is smaller than that of the substrate unit 11 , which is basically negligible. Wherein, the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form a slope, and the connecting portion 12 is a circular structure, and at most one LED light source site 130 can be arranged at the connecting portion 12 . Therefore, in this embodiment, the surface jointly formed by all the substrate units 11 and the connecting portion 12 is basically a discontinuous cone. Certainly, this kind of structure is not as good as the structure of the circular frustum in terms of structural stability.

FIG. 8 is a schematic structural diagram of a substrate unit 11 according to a third embodiment of the present invention. The difference from Embodiment 1 is that, as shown in FIG. 8 , the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form three slopes with three different inclinations. At least one LED light source site 130 is arranged on each slope, so that the illuminated surface is not lower than the maximum preset value.

In other embodiments, the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form multiple curved surfaces with multiple different curvatures. Or optionally, the first surface 1 of each substrate unit 11 is bent toward the second surface 2 to form a surface composed of an inclined surface and an arc surface.

So far, those skilled in the art should recognize that although a number of exemplary embodiments of the present invention have been shown and described in detail herein, they can still be used according to the present invention without departing from the spirit and scope of the present invention. Many other variations or modifications that conform to the principles of the utility model are directly determined or derived from the disclosed content of the new model. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. An LED light source device, comprising: A sheet-shaped substrate body; A plurality of through grooves arranged at intervals in the line direction between the outer periphery of the substrate body and the center of the substrate body are used to divide the substrate body into a plurality of interconnected substrate units, wherein the through grooves The length of the groove is less than the distance between the outer periphery of the substrate body and the center of the substrate body, and the substrate unit has a first surface; a plurality of LED light source sites arranged at the first surface of the plurality of substrate units, for placing LED light sources; Wherein, the LED light source is an LED patch light source; Wherein, each of the substrate units is configured to be able to be bent arbitrarily, so that the illuminated surface irradiated by all the LED light sources together is not lower than a predetermined maximum illuminated surface. 2. The LED light source device according to claim 1, wherein the area of the through groove accounts for 20-50% of the area of the substrate body. 3. The LED light source device according to claim 1 or 2, wherein each said substrate unit comprises: a first end, the first end being an end close to the outer periphery of the substrate unit; and a second end opposite the first end; Wherein, the substrate unit is configured to be bendable from the first surface of the substrate unit toward a second surface opposite to the first surface, so that the first end of the substrate unit is There is a height difference between the second ends; Wherein, the substrate unit is shaped as a curved surface or a plane. 4. The LED light source device according to claim 3, wherein the substrate body further comprises: a connecting portion configured to be integrally formed with the substrate unit and formed at a central position of the substrate body, for connecting a plurality of the substrate units; Wherein, the connection part is connected to the second end part of the substrate unit, and the connection part is a curved surface or a plane. 5. The LED light source device according to claim 4, wherein the first surface of each substrate unit is bent toward the second surface to form an arc-shaped surface; Wherein, the surface jointly formed by all the substrate units and the connection part is basically a discontinuous hemispherical surface or a semi-ellipsoidal surface. 6. The LED light source device according to claim 4, wherein the first surface of each substrate unit is bent toward the second surface to form a slope; Wherein, the surface jointly formed by all the substrate units and the connection part is basically a discontinuous frustum or cone. 7. The LED light source device according to claim 4, wherein the first surface of each substrate unit is bent toward the second surface to form a plurality of slopes with a plurality of different inclinations; Optionally, the first surface of each substrate unit is bent toward the second surface to form multiple curved surfaces with multiple different curvatures; Optionally, the first surface of each substrate unit is bent toward the second surface to form a surface composed of an inclined surface and an arc surface. 8. The LED light source device according to any one of claims 4-7, wherein a plurality of LED light sources located at the same substrate unit are connected in series, and a plurality of LED light sources located at different substrate units The LED light sources are connected in parallel; Optionally, the multiple LED light sources at all the substrate units are connected in parallel. 9. The LED light source device according to claim 8, wherein the substrate body is a metal-based copper clad laminate. 10. The LED light source device according to claim 9, wherein the metal-based copper-clad laminate is an aluminum-based copper-clad laminate or a copper-based copper-clad laminate.