WO2010002156A2

WO2010002156A2 - Printed circuit board for led light capable of being easily changed into polyhedral and polygonal shapes

Info

Publication number: WO2010002156A2
Application number: PCT/KR2009/003509
Authority: WO
Inventors: 박창수; 공배
Original assignee: Park Chang Soo; Kong Bae
Priority date: 2008-06-30
Filing date: 2009-06-29
Publication date: 2010-01-07
Also published as: WO2010002156A3

Abstract

The present invention relates to a printed circuit board for an LED light. More particularly, the present invention proposes a printed circuit board for an LED light capable of being easily changed into polyhedral and polygonal shapes, wherein a base plate with a bending portion for forming polyhedral and polygonal shapes is introduced, and the bend angle of the base plate is freely adjustable to form the base plate into a variety of polyhedral and polygonal forms or shapes with ease in accordance with an object to be used or a position, and wherein a flexible PCB with a circuit pattern is compressed onto the base plate to form the flexible PCB integrally with the base plate, or a connection element for electrical connection at a bent part is introduced in place of the flexible PCB to the automation of bending work, thereby shortening the time taken for assembling, reducing production costs, improving productivity, and being economically advantageous.

Description

Printed circuit board for LED lighting, easy to realize multi-sided polygonal shape

The present invention introduces a base plate formed with a bent portion for implementing a multi-sided polygonal shape, and forms a unitary body by pressing a flexible PCB having a circuit pattern formed thereon or a flexible device for electrical connection at the bent portion instead of the flexible PCB. By introducing the freely adjustable bending angle, the base plate can be easily realized in various shapes or shapes according to the object or position to be used, and the assembly time can be shortened by the automation of the bending work. This paper proposes a printed circuit board for LED lighting that can realize a multi-sided shape that can improve productivity and economy by reducing production costs.

LEDs (light emitting diodes), which are widely used at present, have a high illuminance, a small amount of heat, and a relatively wide range of shapes depending on the shape of the printed circuit board.

Thus, by introducing a method for implementing a multi-sided polygonal shape using a conventional printed circuit board, and looking at the limitations and problems,

In the first method, the printed circuit board may be arbitrarily bent to implement a desired shape, which causes a problem that the printed circuit board is broken or a circuit pattern formed on the printed circuit board is disconnected.

The second method is to use a printed circuit board with a polygonal or polyhedral structure completed in the form required by the product, which is a manual process depending on the structural constraints of the printed circuit board in which a process for mounting a plurality of LEDs is specified. By doing so will cause a problem of poor work efficiency.

In the third method, each printed circuit board mounted with LEDs is connected with pins or wires to implement a desired shape. This is difficult to form a natural angle, and in particular, it is only possible to work by hand, thus introducing an automated process. The problem arises that the assembly time is increased, thus reducing the work efficiency and increasing the production cost.

Looking at the conventional techniques using the flexibility of the flexible PC itself in recognition of the problems described above, Japanese Patent Application Laid-open No. Hei 17-166426 (published on June 23, 2005) (hereinafter referred to as 'cited invention 1') " Lighting device and its manufacturing method "and Republic of Korea Utility Model No. 0274146 (registered on May 06, 2002) (hereinafter referred to as 'quoting invention 2')" Lighting device and manufacturing method using flexible LED " have.

Therefore, in the case of the cited inventions 1 and 2, its value is recognized in that it can be flexibly adjusted to a specific shape by using the flexibility of the flexible PC itself or to flexibly correspond to the place characteristic where the lighting device is installed.

However, in the case of the cited inventions 1 and 2, only the flexibility of the flexible PCB itself is used, and the work time is reduced through the automation of the bending operation of the printed circuit board and other LED mounting processes to realize the multi-sided polygonal shape as in the present application. In the aspect of enhancing the economics of reducing the production cost through the present invention, Cited Invention 1 and 2 are somewhat different in their purpose from the present invention in that they stand at different starting points from the present application.

In addition, the cited inventions 1 and 2 do not have a heat dissipation structure for discharging heat emitted by a plurality of LEDs mounted on the flexible PC, there is a problem that the fire resistance is poor.

The present invention has been made to solve the above problems, by introducing a base plate formed with a bent portion for implementing a multi-sided polygonal shape and formed by integrally compressing the flexible PCB with a circuit pattern formed on the base plate or instead of the flexible PC By introducing a connecting element for the electrical connection in the bent portion to be able to freely adjust the bending angle to facilitate the implementation of the multi-faceted polygonal shape of the base plate in various forms or shapes according to the object or position used,

In addition, the object of the present invention is to provide a printed circuit board for LED lighting, which is easy to implement a multi-faceted shape, which can shorten the assembly time and reduce the production cost through the automation of the bending work, thereby improving productivity and economy.

In addition, the bent portion according to the present invention is formed by cutting a portion of the upper or lower surface, or both of the base plate to form a cut groove and a long hole, furthermore, the bent portion is formed on both sides or one side of the bent portion of the base plate, It is an object of the present invention to provide a printed circuit board for LED lighting that is easy to implement a multi-faceted polygon to prevent the interference between the bending surfaces to facilitate the bending operation more easily and further improve the efficiency of the automation process.

In addition, the auxiliary circuit pattern is formed to ensure the electrical connection when the circuit pattern of the flexible PCB according to the present invention can be improved to improve the reliability of the product, and the base plate is a material capable of heat dissipation can extend the heat dissipation area It is another object of the present invention to provide a printed circuit board for LED lighting, which is easy to implement a multi-faceted shape, which is formed of a structure, and at the same time, the power board is made of a heat dissipable material to improve fire resistance. do.

In addition, the power board according to the present invention forms an insertion groove electrically connected to the flexible PCB so that the flexible PC end is inserted through the insertion groove and then electrically connected to the upper surface of the power substrate to ensure stable electrical connection between the flexible PCB and the power board. It is yet another object of the present invention to provide a printed circuit board for LED lighting, which is easy to implement a polygonal polygon, which is economically superior to existing products requiring double-sided formation, since a circuit pattern of a flexible PC can be formed on only one surface.

Furthermore, the base plate according to the present invention is further provided with a socket for connecting to the power board provided in the external object to facilitate the coupling with the power board, thereby reducing the assembly time, it can be implemented in various forms The purpose of the present invention is to provide a PCB for LEDs that can easily implement a multi-directional angle with improved usability.

According to the present invention, an LED lighting printed circuit board having a multi-sided shape can be easily implemented, and includes: a flexible PCB having a light emitting diode mounted thereon and a circuit pattern for transmitting power and control signals to the light emitting diode; And a base plate arranged on the bottom of the flexible PCB to support the implementation shape of the flexible PCB, and having a bent part for implementing a multi-sided polygonal shape, and being integrally formed by being crimped with the flexible PCB.

In addition, the LED lighting printed circuit board easy to implement a multi-sided polygonal shape according to the present invention is one or more light emitting diodes are mounted, a base plate capable of implementing a polyhedron is formed bent for implementing the angle in the desired direction; And a connection element provided at the bent portion of the base plate and ensuring electrical connection to each surface of the base plate bent for implementing an angle.

The bent portion according to the present invention is a cutout groove formed in the upper or lower surface or both of the base plate, and the bent portion is characterized in that the long hole is formed.

In addition, the base plate according to the invention is characterized in that made of a metal or ceramic material for heat dissipation. The flexible PC according to the present invention may further include an auxiliary circuit pattern for ensuring an electrical connection when the circuit pattern is disconnected at the bent portion.

Furthermore, the circuit pattern of the flexible PCB according to the present invention is formed on only one surface, and an insertion groove for inserting an end of the flexible PC ratio into the power substrate electrically connected to the flexible PC ratio to enable an electrical connection to the upper surface of the power substrate. It is characterized by being provided. In addition, the power substrate according to the invention is characterized in that made of a metal or ceramic material to maximize the heat dissipation efficiency.

On the other hand, the base plate according to the present invention is further provided with a socket for connection with the power board, the power board is provided with a corresponding pin is a socket of the base plate is uniformly fastened to the corresponding pin is characterized in that the power connection is made. It is done.

Finally, both sides or one side of the bent portion of the base plate according to the present invention is characterized in that the curved portion for further preventing the interference between the bent surface of the base plate during the bending operation.

The LED lighting lamp printed circuit board according to the present invention introduces a base plate formed with a bent portion for implementing a multi-sided polygonal shape and formed by integrally compressing the flexible PCB with a circuit pattern formed on the base plate or bent portion instead of the flexible PC By adopting the connecting element for electrical connection in the Easily adjustable bending angle, it is easy to implement a multi-sided polygonal shape of the base plate in various forms or shapes according to the object or position to be used, and also to automate the bending work By doing so, it is possible to shorten the assembly time and thereby reduce the production cost, thereby improving productivity and economy.

In addition, the bent portion according to the present invention is formed by cutting a portion of the upper surface or the lower surface of the base plate, or both of them, and furthermore, a bent portion is formed on both sides or one side of the bent portion of the base plate, so that the bending surface of the base plate at the time of bending work By preventing interference between each other, the bending work is easier and easier to further improve the efficiency of the automated process.

In addition, the auxiliary circuit pattern is formed to ensure the electrical connection when the circuit pattern of the flexible PCB according to the present invention can be improved to improve the reliability of the product, and the base plate is a material capable of heat dissipation can extend the heat dissipation area It is formed of a structure, and at the same time, the power supply board is also made of a material that can radiate heat, thereby improving fire resistance and providing a safer product.

In addition, the power board according to the present invention forms an insertion groove electrically connected to the flexible PCB so that the flexible PC end is inserted through the insertion groove and then electrically connected to the upper surface of the power substrate to ensure stable electrical connection between the flexible PCB and the power board. It is possible to form a flexible PCB circuit pattern on only one surface, which is economically superior to existing products requiring double-sided formation.

Furthermore, the base plate according to the present invention is further provided with a socket for connecting to the power board provided in the external object to facilitate the coupling with the power board, thereby reducing the assembly time, it can be implemented in various forms It will be possible to increase the utilization.

1 is a perspective view showing a printed circuit board for LED lighting according to the present invention,

2 is an exploded perspective view showing a flexible PC and a base plate according to the present invention;

3 is an operation diagram showing an operating state of the bent portion of the base plate according to the present invention,

4 is a cross-sectional view showing a heat radiation structure of the base plate according to the present invention;

5 is a perspective view showing the electrical connection between the end of the flexible PC according to the present invention and the power board;

6 is a perspective view showing the bent portion and the long hole of the base plate according to the present invention,

7 and 8 are perspective views showing another embodiment of the modified LED printed circuit board according to the present invention.

100: printed circuit board

L: Light emitting diode

1: Power board 1a: Fixing groove

1b: power supply unit 2: corresponding pin

5: Insertion groove

10: base plate 10a: fixing pin

11 bend 12 socket

13: uneven portion 14: incision groove

15: longevity

20: Flexible PCB 20a: Flexible PCB End

21: circuit pattern 23: curved portion

25: auxiliary circuit pattern 27: power supply terminal

30: connecting element 31: flexible part

32: crimping portion

Hereinafter, with reference to the accompanying drawings, a printed circuit board for LED lighting easy to implement a multi-sided polygonal shape according to the present invention,

1 to 6 illustrate an embodiment of a printed circuit board for LED lighting according to the present invention, and FIGS. 7 and 8 illustrate another modified embodiment of the printed circuit board for LED lighting according to the present invention. .

1 to 6, a printed circuit board for LED lighting lamps according to the present invention includes a light emitting diode L mounted thereon, and a circuit pattern 21 for transmitting power and control signals to the light emitting diode L. Flexible PCB (20) is formed; And arranged on the bottom of the flexible PC 20 to support the implementation shape of the flexible PC 20, the bent portion 11 for the multi-sided polygonal shape is formed, and is compressed with the flexible PC 20 It comprises a base plate 10 formed integrally.

1 and 2, in the LED lighting printed circuit board according to the present invention, the flexible PC 20 is a method of manufacturing a copper foil or the material of the copper foil laminate laminated on the copper foil, such as soft rubber or plastic It is based on general materials and can be manufactured in various shapes to realize a multi-sided polygonal shape.

In particular, in the polygonal polygonal shape to be implemented, the flexible PC 20 may be manufactured in a so-called starfish shape having a plurality of feet extending from each side of the hexagon on the center surface of the hexagon as shown in the accompanying drawings. Therefore, by increasing the angle of the center plane and increasing the number of feet, it is possible to realize a multi-sided polygonal shape close to a spherical shape, and to adopt a shape such as a center plane or a foot to realize the shape required by the product. Considering the shape and ease of implementation, it can be reasonably determined during the design work.

In addition, a light emitting diode L is mounted on the flexible PC 20, and the number and size of the light emitting diodes L may be selected in consideration of the shape of the product and the brightness required at the installation location. In the flexible PC 20, a circuit pattern 21 for transmitting a power source and a control signal to the light emitting diode L is formed, and the circuit pattern 21 is formed on the upper or lower surface of the flexible PC 20, or these. It is possible to be formed on both, in the case of the flexible PC 20 of the present invention is formed integrally by the thermal compression or deposition method on the base plate 10, the circuit only on the upper surface of one side of the flexible PC 20 It is preferable that the pattern 21 is formed.

As shown in FIG. 5, a power substrate 1 is electrically connected to a lower portion of the printed circuit board 100 of the present invention in order to supply power to the flexible PC 20, and an edge of the power substrate 1 is provided. An insertion groove 5 through which the flexible PCB end 20a having the circuit pattern 21 formed therein is radially formed on the surface thereof, and the flexible PC end 20a is inserted through the insertion groove 5. The flexible PCB end portion 20a is rolled up in the outward direction of the power supply board 1 and electrically connected to the upper portion of the power supply board 1.

That is, a power supply terminal 27 connected to the circuit pattern 21 is formed at the flexible PCB end 20a, and the power supply terminal 27 of the flexible PC 20 is electrically connected to the power substrate 1. A power supply unit 1b connected to the power supply unit 1b is formed, and thus, the power supply unit 1b formed on the power supply board 1 is formed on the power supply terminal 27 formed at the flexible PC end 20a through the connection method as described above. Electrical connection to the device allows for a more stable and reliable electrical connection.

This is because the circuit pattern 21 can be formed only on one surface of the flexible PC 20 by forming the fastening structure in the above manner. In particular, since the bottom of the flexible PC 20 of the present invention is integrally coupled with the base plate 10 for heat dissipation by a crimping method, the circuit pattern 21 is inevitably formed on the upper surface of the flexible PC 20, If the power supply terminal 27 is formed on the upper end portion 20a of the flexible PCB connected to the power supply board 1 due to the fastening method using the aforementioned insertion groove 5 when the power supply board 1 is fastened. Because.

Furthermore, as illustrated in 'A' of FIG. 1 and FIG. 2, the flexible PC 20 according to the present invention includes an auxiliary circuit for ensuring electrical connection when the circuit pattern 21 according to the multi-sided polygonal shape is disconnected. A pattern 25 is formed, and when the auxiliary circuit pattern 25 is bent in the bent portion 11 of the base plate 10 to implement a polygonal shape, disconnection of the circuit pattern 21 is formed in the bent portion 11. This may occur, in this case to prevent the electrical connection to the light emitting diode (L) of the location is broken to reduce the reliability of the product.

That is, the circuit patterns 21 on both sides of the bent portion 11 are connected to the bent portion 11 of the base plate 10 so that even when the circuit pattern 21 is disconnected, the auxiliary circuit patterns 25 It can ensure a reliable connection.

1 to 6, in the LED lighting printed circuit board according to the present invention, the base plate 10 is arranged on the bottom of the flexible PC 20 to support the implementation shape of the flexible PC 20 In addition, it comprises a bent portion 11 formed to facilitate and facilitate the implementation of the polygonal polygon.

The base plate 10 corresponds to the shape of the flexible PC 20 and the shape thereof is determined. As shown in FIG. 5, the end of the base plate 10 has fixing pins 10a at one side or both sides thereof. Protrudingly formed, the power supply substrate 1 has a fixing groove (1a) corresponding to the fixing pin (10a) is formed so that the fixing pin (10a) is inserted into the fixing groove (1a), in this case the power substrate (1) The base plate 10 and the power supply board 1 are fixedly connected by bending the end of the fixing pin 10a protruding from the bottom or by soldering or the like.

As shown in FIG. 2, the base plate 10 and the flexible PC 20 are integrally formed by heat compression (or deposition), which is a manual process for implementing a multi-faceted polygonal shape of a conventional LED lamp. This is to improve the inefficiency of connecting the printed circuit board by using wires or pins.

Therefore, by forming the base plate 10 and the flexible PC 20 integrally, it is possible to fully automate the bending work to realize the multi-faceted polygonal shape, and also to flatten a plurality of LEDs in the LED mounting process before the bending work. Since the necessary part of the unfolded printed circuit board can be easily mounted through an automated process, mass production is possible by lowering assembly time and production cost.

In particular, the automation of the bending operation is a number of bent portions 11 formed on the base plate 10, rather than manually connecting each surface for the multi-sided polygonal formation or bending individually to implement a multi-sided polygonal shape ) Simultaneously pressurizing or adsorbing in the desired direction to finally form the desired polygonal polygon.

In addition, as shown in Figures 1 to 6 (especially see also the operating state shown in Figure 3) the bent portion 11 formed on the base plate 10 is a bent portion for implementing a multi-sided polygonal shape (in the accompanying drawings Formed by a hidden line.) And the ease of bending work, and the bent portion 11 is a cutout groove 14 formed in the upper or lower surface of the base plate 10, or both of the base plate ( Part 10 is to be dug up, and in this case, the depth of digging the cutting groove 14 is preferably determined in consideration of the ease of bending work and the prevention of breakage of the base plate (10).

In addition, as shown in FIG. 6, the bent part 11 of the base plate 10 is formed with a long hole 15 formed by drilling a part of the bent part 11 in addition to the cutout groove 14. The bending work of the plate 10 can be made easier, and the long hole 15 also has a side effect of reducing material costs by simultaneously performing a role for weight loss of the base plate 10.

In addition, as shown in FIG. 6, the curved portion 23 is further formed on both sides or one side of the bent portion 11 of the base plate 10 to prevent interference between the bent surfaces of the base plate 10 during the bending operation. As described above, the bending surfaces of the bending portions 11 abut each other and overlap each other when the bending operation of the base plate 10 is overlapped, or the opposite surfaces of the bending portions 11 are expanded by pushing each other when the bending surfaces overlap each other. This is to prevent the phenomenon that the circuit pattern 21 is broken.

Therefore, the curved portion 23 is formed at the bent portion to minimize the contact area between the bent surfaces so that the circuit pattern 21 of the flexible PC 20 can be prevented from being disconnected at the bent portion, and the base plate ( It is possible to ensure the ease of bending by making the bending work of 10) easier.

Furthermore, the base plate 10 may be made of a metal or ceramic material such as aluminum to dissipate heat generated by the light emitting diode L to the outside for radiating heat, and to release heat in addition to the above materials. By adopting a variety of materials to discharge the heat to the outside can improve the fire resistance performance of the product.

In addition, as shown in FIG. 4, the upper or lower surface of the base plate 10 or both have a heat dissipation structure for increasing heat dissipation efficiency by expanding a heat dissipation area. It is preferable that the concave-convex portion 13 is formed.

However, the uneven portion 13 may be formed on the top or bottom surface, or both of the base plate 10 as described above, but considering the adhesiveness of the base plate 10 and the flexible PC 20 base plate ( 10) It is preferably formed only on the lower surface.

In addition, in order to maximize the heat dissipation efficiency, the power substrate 1 may be formed of a metal or ceramic material such as aluminum, or may adopt various materials capable of dissipating heat in addition to the above materials. Although not yet, it is preferable that the concave-convex portion as described above is formed on the lower surface of the power substrate so as to expand the heat dissipation area to further increase heat dissipation efficiency.

Hereinafter, another exemplary embodiment of the LED lighting printed circuit board according to the present invention will be introduced. In this case, the configuration using the same name and reference numeral as the configuration as described above has the same function and effect. The description thereof will be omitted for clarity.

As shown in FIGS. 7 and 8, one or more light emitting diodes L are mounted as another embodiment of the LED lighting printed circuit board, which is easy to implement a multi-sided polygonal shape according to the present invention, and implements an angle in a desired direction. A base plate 10 having a bent portion 11 formed therein for implementing a polyhedron; And a connection element 30 provided at the bent portion 11 of the base plate 10 and ensuring electrical connection to each surface of the base plate 10 that is bent to implement an angle.

First, the embodiment is not provided with the flexible PC as described above, the light emitting diode (L) is mounted on the base plate 10, the circuit pattern for transmitting power and control signals to the light emitting diode (L) ( 21 is formed on the base plate 10,

However, in this case, the bent part 11 for implementing the polygonal polygonal shape of the base plate 10 is provided in the form of the cutout groove 14 and / or the long hole 15 as described above. Electrical connection by the circuit pattern 21 cannot be guaranteed.

Therefore, the connection element 30 is electrically connected to the circuit pattern 21 formed on each surface of the base plate 10 with the bent portion 11 therebetween to enable stable supply of the printed circuit board 100. Product reliability can be increased.

In addition, the connection element 30 is made of a flexible portion 31 made of a flexible material and the pressing portion 32 formed on both ends of the flexible portion 31, the flexible portion 31 of the base plate 10 It ensures flexibility when bending, that is, a function that can make the bending operation easier and easier, as well as the crimping portion 32 connected to both ends of the flexible portion 31 is the circuit pattern 21 of the base plate 10 It is preferable to ensure the firm fixing force of the connection element 30 by being connected through the compression (or deposition) method by the overheat.

In addition, the flexible part 31 may be extended by a predetermined length or more so that a smooth angle may be realized when the base plate 10 is bent, and a part of the flexible part 31 may be formed in a bellows shape when needed to bend. It is preferable to comprise so that it may respond to an extended length.

Furthermore, the base plate 10 according to the present invention is further provided with a socket 12 for connection with the power board 1 provided in the external object, so that the coupling with the power board 1 is easy and easy. It is possible to shorten the assembly time due to the various forms, and to increase its utility.

In order to securely connect the base plate 10 and the power board 1, the power supply board 1 is provided with a corresponding pin 2, and the socket 12 of the base board 10 is provided with a corresponding pin 2. By being uniformly fastened to the power supply, all of the base plate 10 and the other base plate 10 connected to the base plate 10 and the other base plate 10 connected to each other in one coupling have an advantage of easy assembly. As illustrated in the drawing, only one socket 12 is formed on the base plate 10, but the socket 12 may be formed in a desired shape on each base plate 10 as needed.

In the description of the LED lighting printed circuit board that is easy to implement a multi-sided polygon of the present invention with reference to the accompanying drawings, the present invention has been described with a particular shape and direction, the present invention can be variously modified and changed by those skilled in the art, such Modifications and variations should be construed as being included in the scope of the present invention.

Claims

A flexible PCB having a light emitting diode mounted thereon and a circuit pattern for transmitting power and control signals to the light emitting diode; And

A base plate which is arranged on the bottom of the flexible PC to support the implementation shape of the flexible PC, and has a bent part for realizing a multi-sided polygonal shape and is formed integrally by being compressed and integrally formed with the flexible PC. Easy to implement printed circuit board for LED lighting.
A base plate having one or more light emitting diodes mounted thereon, and having a bent portion formed to implement an angle in a desired direction; And

LED lighting printed circuit board that is easy to implement a multi-sided polygon comprising a; connecting element provided in the bent portion of the base plate and ensures electrical connection to each side of the base plate bent for the implementation of the angle.
The method according to claim 1 or 2,

The bent portion is a printed circuit board for easy implementation of a multi-sided polygon, characterized in that the incision groove formed on the top or bottom, or both of the base plate.
The method according to claim 1 or 2,

The printed circuit board for LED lighting easy to implement a multi-sided polygonal shape, characterized in that the bent portion is formed in the bent portion.
The method according to claim 1 or 2,

The base plate is an LED lighting printed circuit board that is easy to implement a multi-sided polygonal, characterized in that made of a metal or ceramic material for heat dissipation.
The method according to claim 1 or 2,

The flexible PCB is a LED lighting printed circuit board that is easy to implement a polygonal polygon, characterized in that the auxiliary circuit pattern is further provided to ensure an electrical connection when the circuit pattern is disconnected at the bent portion.
The method of claim 1,

The circuit pattern of the flexible PC is formed only on one surface,

The LED substrate is electrically connected to the flexible PCB, and the flexible PCB end is inserted through the insertion groove for inserting the electrical connection to the upper surface of the power substrate to enable electrical connection. Circuit board.
The method of claim 7, wherein

The power board is a LED lighting printed circuit board that is easy to implement a multi-faceted polygonal, characterized in that made of a metal or ceramic material to maximize the heat dissipation efficiency.
The method of claim 2,

The base plate is further provided with a socket for connection with the power board,

The power board is provided with a corresponding pin, the socket of the base plate is fastened to the corresponding pin uniformly, the LED lighting printed circuit board easy to implement a multi-sided polygonal, characterized in that the connection.
The method according to claim 1 or 2,

Both sides or one side of the bent portion of the base plate is a multiple-sided polygonal LED printed circuit board easy to implement, characterized in that the curved portion for preventing the interference between the bending surface of the base plate during the bending operation.