Light source substrate with branch layout structure

Abstract

To provide a light source substrate with a branch layout structure.SOLUTION: A light source substrate which has a branch layout structure includes a circuit board, a first copper foil, a plurality of second copper foils, and a plurality of light sources. The first copper foil is installed on the circuit board. The second copper foils are installed on the circuit board, and each have a branch structure. The plurality of light sources are installed on the circuit board, and electrically connected to the first copper foil and the plurality of second copper foils. Branch structures of the respective second copper foils and branch structure of adjacent second copper foils are arranged alternately. Two adjacent branch parts therefore form one capacitor to equivalently connect each light source to a plurality of capacitors in parallel, and can thereby increase dispersed capacity of each light source to provide buffer effect, thereby preventing the light source from being damaged.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a light source substrate, and more particularly to a light source substrate having a branched layout structure. [Background technology]

[0002] Conventional lighting devices use a metal case to improve heat dissipation and connect the metal case to a ground point to meet safety requirements. This creates a parasitic capacitance between the copper foil on the light source board and the metal case. When the switch is turned on, an AC voltage is applied to the light source (connected to the copper foil) on the light source board. When the AC voltage is applied, the parasitic capacitance becomes conductive, causing the light source on the light source board to be subjected to a constant reverse voltage. If this reverse voltage is applied to the light source for a long period of time, it can damage the light source.

[0003] To solve the above problems, lighting device manufacturers have proposed several solutions. One common solution is to add a Zener diode to the lighting device circuit, but this solution increases costs and reduces light efficiency.

[0004] Another common solution is to add a separate power supply to the lighting device circuit, but this solution also adds cost and reduces power efficiency.

[0005] Yet another common solution is to add a resistor (or capacitor) to the lighting device circuit and connect the resistor in parallel with the light source, but this solution also increases cost and reduces light efficiency. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a light source substrate having a branched layout structure. [Means for solving the problem]

[0007] According to one embodiment of the present invention, there is provided a light source substrate having a branched layout structure including a circuit board, a first copper foil, a plurality of second copper foils, and a plurality of light sources. The first copper foil is disposed on the circuit board. The plurality of second copper foils are disposed on the circuit board, each having a branched structure. The plurality of light sources are disposed on the circuit board and electrically connected to the first copper foil and the plurality of second copper foils. The branched structure of each second copper foil is arranged alternately with the branched structure of an adjacent second copper foil.

[0008] In one embodiment, the branching structure of each second copper foil is tree-shaped.

[0009] In one embodiment, the structure of each second copper foil has a main extension portion and a plurality of branch portions, the main extension portion being connected to the second copper foil, and the plurality of branch portions being connected to the main extension portion.

[0010] In one embodiment, each branch portion of the branch structure of each second copper foil is adjacent to at least one branch portion of the branch structure of an adjacent second copper foil, or is located between two branch portions of the branch structure of an adjacent second copper foil.

[0011] In one embodiment, the extension direction of the main extension portion and the extension direction of the plurality of branch portions are perpendicular to each other.

[0012] In one embodiment, an angle is formed between the extension direction of the main extension portion and the extension direction of the plurality of branch portions, and the angle is greater than or less than 90 degrees.

[0013] In one embodiment, each light source is electrically connected to a first copper foil and one second copper foil via a positive pad and a negative pad, or to two of the second copper foils via a positive pad and a negative pad.

[0014] In one embodiment, the plurality of light sources are light emitting diodes.

[0015] In one embodiment, the first copper foil and the plurality of second copper foils are electrically connected to a power source.

[0016] In one embodiment, the circuit board is a rigid circuit board or a flexible circuit board. [Effects of the Invention]

[0017] Based on the above, a light source substrate with a branched layout structure according to an embodiment of the present invention may have one or more of the following advantages.

[0018] (1) In one embodiment of the present invention, a light source substrate includes a circuit board, a first copper foil, a plurality of second copper foils, and a plurality of light sources. The first copper foil is disposed on the circuit board. The plurality of second copper foils are disposed on the circuit board, each having a branch structure. The plurality of light sources are disposed on the circuit board and electrically connected to the first copper foil and the plurality of second copper foils. The branch structure of each second copper foil is staggered with the branch structure of an adjacent second copper foil. Furthermore, each branch portion of the branch structure of each second copper foil is adjacent to at least one branch portion of the branch structure of an adjacent second copper foil. Therefore, two adjacent branch portions can form a capacitor, making each light source equivalent to being connected in parallel with multiple capacitors, and increasing the distributed capacitance of each light source. Therefore, when a reverse voltage is applied to each light source, the distributed capacitance provides a buffering effect and prevents damage to the light source. As can be seen from the above, the special branch layout structure can significantly improve the reliability of the light source substrate and extend the service life of the light source substrate.

[0019] (2) In one embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacity of each light source without using Zener diodes or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high light efficiency can be achieved. This allows the light source board to be used in a wider range of applications and better meet the requirements of actual applications.

[0020] (3) In one embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacity of each light source without requiring an independent power supply or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high power efficiency can be achieved. This allows the light source board to be used in a wider range of applications and better meet the requirements of actual applications.

[0021] (4) In one embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacitance of each light source without using additional resistors, capacitors, or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source panel can be significantly reduced and high light efficiency can be achieved. This allows the light source board to be used in a wider range of applications and better meets the requirements of actual applications.

[0022] (5) In one embodiment of the present invention, the light source board has a branched layout structure, which can significantly increase the distribution capacity of each light source. Therefore, when the light source board is connected to a power source and the input voltage of the power source is applied to the light source board, the distribution capacity can suppress momentary high voltages, preventing the light sources of the light source board from being damaged by momentary high voltages. This further improves the reliability of the light source board and better adapts to future development trends.

[0023] (6) In one embodiment of the present invention, the branched layout structure of the light source substrate can not only improve the light efficiency of the lighting device, but also improve the power efficiency of the lighting device, thereby effectively improving the overall performance of the lighting device and meeting different user requirements.

[0024] (7) In one embodiment of the present invention, the light source substrate is designed simply and can achieve the desired effect while keeping costs down, thereby achieving high practicality and providing greater flexibility in the use of the light source substrate, and meeting the requirements of different applications. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a top view of a structure of a light source substrate having a branched layout structure according to an embodiment of the present invention; [Figure 2] FIG. 10 is a top view of a light source substrate having a branched layout structure according to another embodiment of the present invention. [Figure 3] 10 is a flowchart of a method for manufacturing a light source substrate according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings of this specification allow those skilled in the art to easily understand the objectives and advantages of the present invention.

[0027] Hereinafter, embodiments of a light source substrate having a branched layout structure of the present invention will be described with reference to the related drawings. For clarity and ease of description in the drawings, the dimensions and proportions of each component in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is described as being "connected" or "coupled" to another component, this may be directly connected or coupled to the other component, or an intermediary component may be present. When a component is described as being "directly connected" or "directly coupled" to another component, this does not mean that an intermediary component is present, and other terms describing the relationship between components or layers should be interpreted similarly. For ease of understanding, the same components in the following embodiments will be denoted and described with the same reference numerals.

[0028] 1 is a top view of a light source substrate structure having a branched layout structure according to one embodiment of the present invention. As shown in the figure, the light source substrate 1 includes a circuit board 11, a first copper foil 12A, a plurality of second copper foils 12B, a plurality of light sources 13, a plurality of positive electrode pads P+, and a plurality of negative electrode pads P-. Although only a few light sources 13 and a few second copper foils 12B are shown in FIG. 1, the number of the above components can be adjusted according to actual needs.

[0029] The first copper foil 12A is placed on the circuit board 11. In one embodiment, the circuit board 11 may be a rigid circuit board or a flexible circuit board.

[0030] The plurality of second copper foils 12B are disposed on the circuit board 11. Each of the second copper foils 12B has two branch structures BS, which are disposed on both sides of the second copper foil 12B and are disposed opposite each other. Each branch structure BS of each second copper foil 12B is alternately arranged with one of the branch structures BS of the adjacent second copper foil 12B. The first copper foil 12A and the plurality of second copper foils 12B are electrically connected to a power source (not shown). In this embodiment, the branch structure BS of each second copper foil 12B is tree-shaped. In other embodiments, the branch structure BS of each second copper foil 12B may have other similar shapes.

[0031] The plurality of positive electrode pads P+ and the plurality of negative electrode pads P− are disposed on a circuit board 11.

[0032] The plurality of light sources 13 are electrically connected to the first copper foil 12A and the plurality of second copper foils 12B. A positive electrode pad P+ is provided on the first copper foil 12A, and a negative electrode pad P- is provided on one end of each of the second copper foils 12B, and a positive electrode pad P+ is provided on the other end. The first light source 13 is disposed between the first copper foil 12A and the second copper foil 12B adjacent to the first copper foil 12A, and is welded to the positive electrode pad P+ and the negative electrode pad P-. Each of the other light sources 13 is disposed between adjacent second copper foils 12B, and is welded to the positive electrode pad P+ of one of the second copper foils 12B and the negative electrode pad P- of the other second copper foil 12B. In this manner, the plurality of light sources 13 can be electrically connected to the circuit board 11, the first copper foil 12A, and the plurality of second copper foils 12B. The plurality of light sources 13 may be light-emitting diodes.

[0033] In this embodiment, the branch structure BS of each second copper foil 12B has a main extension BS1 and multiple branch portions BS2 (the main extension BS1 and multiple branch portions BS2 are also copper foils). The main extension BS1 is connected to the second copper foil 12B, and the multiple branch portions BS2 are connected to the main extension BS1. The multiple branch portions BS2 may be provided on one or both sides of the main extension BS1. The extension direction of the main extension BS1 and the extension direction of the multiple branch portions BS2 are perpendicular to each other.

[0034] As described above, each branch structure BS of each second copper foil 12B and one branch structure BS of an adjacent second copper foil 12B are arranged alternately. Therefore, each branch portion BS2 of the branch structure BS of each second copper foil 12B is adjacent to at least one branch portion BS2 of the branch structure BS of the adjacent second copper foil 12B, or is located between two branch portions BS2 of the branch structures BS of the adjacent second copper foils 12B.

[0035] In another embodiment, an angle is formed between the extension direction of the main extension portion BS1 and the extension direction of the plurality of branch portions BS2, and the angle is greater than 90 degrees. In another embodiment, an angle is formed between the extension direction of the main extension portion BS1 and the extension direction of the plurality of branch portions BS2, and the angle is smaller than 90 degrees.

[0036] The above-described branch layout structure increases the plate area of ​​the positive electrode pad P+ and the negative electrode pad P- of each light source 13. Furthermore, two adjacent branch sections BS2 form a capacitor. The capacitance formed by the multiple branch sections BS2 is connected in parallel with the distributed capacitance of the positive electrode pad P+ and the negative electrode pad P- themselves. The above technical effect is equivalent to increasing the capacitance value of the distributed capacitance of the positive electrode pad P+ and the negative electrode pad P- themselves. The larger the capacitance value of the capacitor, the smaller the capacitive reactance.

[0037] Therefore, when a reverse voltage is applied to each light source 3, most of the reverse voltage is distributed to the distributed capacitance, reducing the voltage received by the light source 13. As can be seen from the above, when a reverse voltage is applied to each light source 13, the distributed capacitance provides a buffering effect, preventing damage to the light source 13. As can be seen from the above, the special branching layout structure significantly improves the reliability of the light source 13 and extends the service life of the light source substrate 1.

[0038] In this embodiment, the branched layout structure increases the distributed capacitance of each light source 13 without using Zener diodes, resistors, capacitors, or other circuit components, thereby improving the reliability of the light source board 1. In this way, the cost of the light source board can be significantly reduced and high light efficiency can be achieved. This allows the light source board to be applied in a wider range and better meet the requirements of actual applications.

[0039] Furthermore, in this embodiment, the branched layout structure described above can increase the distribution capacity of each light source 13 without using an independent power supply or other circuit components, thereby improving the reliability of the light source substrate 1. In this way, high power efficiency can be achieved while significantly reducing the cost of the light source substrate 1. This allows the light source substrate 1 to be applied in a wider range of applications, better meeting the requirements of actual applications.

[0040] Furthermore, in this embodiment, the aforementioned branch layout structure can significantly increase the distribution capacitance of each light source 13. Therefore, when the light source board 1 is connected to a power supply and the input voltage of the power supply is applied to the light source board 1, the distribution capacitance can provide an effect of suppressing momentary high voltage, thereby preventing the light sources 13 of the light source board 1 from being damaged by momentary high voltage. This can further improve the reliability of the light source board 1 and better adapt to future development trends.

[0041] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the light source substrate having the branched layout structure of this embodiment should still fall within the scope of protection of the present invention.

[0042] 2 is a top view of a light source substrate having a branched layout structure according to another embodiment of the present invention. As shown in the figure, the light source substrate 1 includes a circuit board 11, a first copper foil 12A, a plurality of second copper foils 12B, a plurality of light sources 13, a plurality of positive electrode pads P+, and a plurality of negative electrode pads P-. Although only a few light sources 13 and a few second copper foils 12B are shown in FIG. 2, the number of the above structural components can be adjusted according to actual needs.

[0043] The first copper foil 12A is placed on the circuit board 11. In one embodiment, the circuit board 11 may be a rigid circuit board or a flexible circuit board.

[0044] The plurality of second copper foils 12B are disposed on the circuit board 11. The plurality of positive electrode pads P+ and the plurality of negative electrode pads P- are disposed on the circuit board 11. The plurality of light sources 13 are electrically connected to the first copper foil 12A and the plurality of second copper foils 12B. The first copper foil 12A is provided with one positive electrode pad P+. Each second copper foil 12B is provided with one negative electrode pad P- at one end and one positive electrode pad P+ at the other end. The first light source 13 is disposed between the first copper foil 12A and the second copper foil 12B adjacent to the first copper foil 12A and is welded to the positive electrode pad P+ and the negative electrode pad P-. Each of the other light sources 13 is disposed between two adjacent second copper foils 12B and is welded to the positive electrode pad P+ of one of the second copper foils 12B and the negative electrode pad P- of the other second copper foil 12B. In this way, the plurality of light sources 13 can be electrically connected to the circuit board 11, the first copper foil 12A, and the plurality of second copper foils 12B.

[0045] The above components are similar to those in the previous embodiment and will not be described in detail here. Unlike the previous embodiment, in this embodiment, each second copper foil 12B has only one branch structure BS provided on one side of the second copper foil 12B.

[0046] Similarly, the branch structure BS of each second copper foil 12B and the branch structure BS of the adjacent second copper foil 12B are arranged alternately. The first copper foil 12A and the plurality of second copper foils 12B are electrically connected to a power source (not shown). The branch structure BS of each second copper foil 12B is tree-shaped. The branch structure BS of each second copper foil 12B has a main extension BS1 and a plurality of branch portions BS2 (the main extension BS1 and the plurality of branch portions BS2 are also copper foils). The main extension BS1 is connected to the second copper foil 12B, and the plurality of branch portions BS2 are connected to the main extension BS1. The plurality of branch portions BS2 may be provided on one or both sides of the main extension BS1. The extension direction of the main extension BS1 and the extension direction of the plurality of branch portions BS2 are perpendicular to each other.

[0047] The above-described branch layout structure increases the plate area of ​​the positive electrode pad P+ and the negative electrode pad P- of each light source 13. Furthermore, two adjacent branch sections BS2 form a capacitor. The capacitance formed by the multiple branch sections BS2 is connected in parallel with the distributed capacitance of the positive electrode pad P+ and the negative electrode pad P-. The above technical effect is equivalent to increasing the capacitance value of the distributed capacitance of the positive electrode pad P+ and the negative electrode pad P- themselves. The larger the capacitance value of the capacitor, the smaller the capacitive reactance.

[0048] Therefore, when a reverse voltage is applied to each light source 3, most of the reverse voltage is distributed to the distributed capacitance, reducing the voltage received by the light source 13. As can be seen from the above, when a reverse voltage is applied to each light source 13, the distributed capacitance provides a buffering effect, preventing damage to the light source 13. As can be seen from the above, the special branch layout structure can significantly improve the reliability of the light source 13 and extend the service life of the light source substrate 1.

[0049] Similarly, in this embodiment, the branched layout structure increases the distributed capacitance of each light source 13 without using Zener diodes, resistors, capacitors, or other circuit components, thereby improving the reliability of the light source board 1. In this way, the cost of the light source board can be significantly reduced and high light efficiency can be achieved. This allows the light source board to be applied in a wider range and better meet the requirements of actual applications.

[0050] Furthermore, in this embodiment, the branched layout structure described above can increase the distribution capacity of each light source 13 without using an independent power supply or other circuit components, thereby improving the reliability of the light source substrate 1. In this way, high power efficiency can be achieved while significantly reducing the cost of the light source substrate 1. This allows the light source substrate 1 to be applied in a wider range of applications, better meeting the requirements of actual applications.

[0051] Furthermore, in this embodiment, the aforementioned branch layout structure can significantly increase the distribution capacitance of each light source 13. Therefore, when the light source board 1 is connected to a power supply and the input voltage of the power supply is applied to the light source board 1, the distribution capacitance can provide an effect of suppressing momentary high voltage, thereby preventing the light sources 13 of the light source board 1 from being damaged by momentary high voltage. This can further improve the reliability of the light source board 1 and better adapt to future development trends.

[0052] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the light source substrate having the branched layout structure of this embodiment should still fall within the scope of protection of the present invention.

[0053] Conventional lighting devices use a metal case to improve heat dissipation and connect the metal case to a ground point to meet safety requirements. This creates a parasitic capacitance between the copper foil on the light source board and the metal case. When the switch is turned on, an AC voltage is applied to the light source (connected to the copper foil) on the light source board. When the AC voltage is applied, the parasitic capacitance becomes conductive, causing the light source on the light source board to receive a certain reverse voltage.

[0054] If this reverse voltage is applied to the light source for a long period of time, it can damage the light source. To solve this problem, lighting device manufacturers have proposed several solutions. One common solution is to add a Zener diode to the lighting device circuit, but this solution increases costs and reduces light efficiency. Another common solution is to add an independent power supply to the lighting device circuit, but this solution also increases costs and reduces power efficiency.

[0055] Another common solution is to add a resistor (or capacitor) to the lighting device circuit and connect the resistor in parallel with the light source, but this solution also increases costs and reduces light efficiency. In contrast, according to an embodiment of the present invention, a light source substrate includes a circuit board, a first copper foil, multiple second copper foils, and multiple light sources. The first copper foil is mounted on the circuit board. The multiple second copper foils are mounted on the circuit board, each having a branched structure.

[0056] The plurality of light sources are mounted on a circuit board and electrically connected to the first copper foil and the plurality of second copper foils. The branch structure of each second copper foil is arranged alternately with the branch structure of an adjacent second copper foil. Furthermore, each branch portion of the branch structure of each second copper foil is adjacent to at least one branch portion of the branch structure of an adjacent second copper foil.

[0057] Therefore, two adjacent branches can form a capacitor, which is equivalent to connecting each light source in parallel with multiple capacitors, thereby increasing the distributed capacitance of each light source. Therefore, when a reverse voltage is applied to each light source, the distributed capacitance provides a buffering effect and prevents the light source from being damaged. As can be seen from the above, the special branch layout structure can greatly improve the reliability of the light source board and extend the service life of the light source board.

[0058] According to an embodiment of the present invention, the light source board has a branched layout structure, and the distributed capacitance of each light source is increased without using Zener diodes or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high light efficiency can be achieved, thereby broadening the application of the light source board and better meeting the requirements of actual applications.

[0059] According to an embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacity of each light source without requiring an independent power supply or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high power efficiency can be achieved, thereby broadening the application of the light source board and better meeting the requirements of actual applications.

[0060] Furthermore, according to the embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacitance of each light source without using additional resistors, capacitors, or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source panel can be significantly reduced and high light efficiency can be achieved. Therefore, the application of the light source board can be broadened and the requirements of actual applications can be better met.

[0061] Furthermore, according to the embodiment of the present invention, the light source board has a branched layout structure, which can greatly increase the distribution capacity of each light source. Therefore, when the light source board is connected to a power source and the input voltage of the power source is applied to the light source board, the distribution capacity can suppress momentary high voltage, preventing the light sources of the light source board from being damaged by momentary high voltage. This further improves the reliability of the light source board and better adapts to future development trends.

[0062] Furthermore, according to the embodiment of the present invention, the branched layout structure of the light source substrate can not only improve the light efficiency of the lighting device, but also improve the power efficiency of the lighting device, thereby effectively improving the overall performance of the lighting device and meeting the requirements of different users.

[0063] Furthermore, according to the embodiment of the present invention, the design of the light source substrate is simple, and the desired effect can be achieved while keeping costs down. Therefore, the light source substrate achieves high practicality, and the use of the light source substrate is more flexible, and the requirements of different applications can be met. From the above, it can be seen that the light source substrate with a branched layout structure according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0064] 3 is a flowchart showing a method for manufacturing a light source substrate according to still another embodiment of the present invention. As shown in the figure, the manufacturing method of this embodiment includes the following steps:

[0065] Step S31: Provide a circuit board. Step S32: A first copper foil is formed on the circuit board. Step S33: Form a plurality of second copper foils on the circuit board, each having a branched structure, and the branched structure of each second copper foil is arranged differently from the branched structure of an adjacent second copper foil. The branched structure of each second copper foil is tree-shaped. The branched structure of each second copper foil has a main extension and a plurality of branched portions. The main extension is connected to the second copper foil, and the plurality of branches are connected to the main extension. Step S34: A plurality of positive electrode pads and a plurality of negative electrode pads are formed on the first copper foil and the plurality of second copper foils. Step S35: Weld a plurality of light sources to the plurality of positive electrode pads and the plurality of negative electrode pads, respectively, to electrically connect the plurality of light sources, the first copper foils, the plurality of second copper foils and the circuit board.

[0066] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the manufacturing method of the light source substrate of this embodiment should still fall within the scope of protection of the present invention.

[0067] Although the steps of the methods described herein are shown and described in a particular order, the order of operations of each method may be changed, some steps may be performed in reverse order or simultaneously with other steps, and in other embodiments, different steps may be performed intermittently and / or alternately.

[0068] In summary, according to an embodiment of the present invention, a light source substrate includes a circuit board, a first copper foil, a plurality of second copper foils, and a plurality of light sources. The first copper foil is disposed on the circuit board. The plurality of second copper foils are disposed on the circuit board, each having a branched structure.

[0069] The plurality of light sources are mounted on a circuit board and electrically connected to the first copper foil and the plurality of second copper foils. The branch structure of each second copper foil is arranged alternately with the branch structure of an adjacent second copper foil. Furthermore, each branch portion of the branch structure of each second copper foil is adjacent to at least one branch portion of the branch structure of an adjacent second copper foil.

[0070] Therefore, two adjacent branches can form a capacitor, which is equivalent to connecting each light source in parallel with multiple capacitors, thereby increasing the distributed capacitance of each light source. Therefore, when a reverse voltage is applied to each light source, the distributed capacitance provides a buffering effect and prevents the light source from being damaged. As can be seen from the above, the special branch layout structure can greatly improve the reliability of the light source board and extend the service life of the light source board.

[0071] According to an embodiment of the present invention, the light source board has a branched layout structure, and the distributed capacitance of each light source is increased without using Zener diodes or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high light efficiency can be achieved, thereby broadening the application of the light source board and better meeting the requirements of actual applications.

[0072] According to an embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacity of each light source without requiring an independent power supply or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source board can be significantly reduced and high power efficiency can be achieved, thereby broadening the application of the light source board and better meeting the requirements of actual applications.

[0073] Furthermore, according to the embodiment of the present invention, the light source board has a branched layout structure, which increases the distribution capacitance of each light source without using additional resistors, capacitors, or other circuit components, thereby improving the reliability of the light source board. In this way, the cost of the light source panel can be significantly reduced and high light efficiency can be achieved. Therefore, the application of the light source board can be broadened and the requirements of actual applications can be better met.

[0074] Furthermore, according to the embodiment of the present invention, the light source board has a branched layout structure, which can greatly increase the distribution capacity of each light source. Therefore, when the light source board is connected to a power source and the input voltage of the power source is applied to the light source board, the distribution capacity can suppress momentary high voltage, preventing the light sources of the light source board from being damaged by momentary high voltage. This further improves the reliability of the light source board and better adapts to future development trends.

[0075] Furthermore, according to the embodiment of the present invention, the branched layout structure of the light source substrate can not only improve the light efficiency of the lighting device, but also improve the power efficiency of the lighting device, thereby effectively improving the overall performance of the lighting device and meeting the requirements of different users.

[0076] Furthermore, according to the embodiment of the present invention, the light source substrate can be designed simply and with reduced cost while still achieving the desired effect, thereby achieving high practicality and providing greater flexibility in the use of the light source substrate, and meeting the requirements of different applications.

[0077] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, or the direct or indirect application of the above technical solutions to other related technical fields, are all within the scope of the claims of the present invention. [Explanation of symbols]

[0078] 1 Light source board 11 Circuit Board 12A No. 1 copper foil 12B Multiple Secondary Copper Foil 13 Light source P+ positive pad P- negative electrode pad BS branch structure BS1 Main extension section BS2 branch point S31 Step S32 Step S33 Step S34 Step S35 Step

Claims

1. A circuit board; a first copper foil disposed on the circuit board; a plurality of second copper foils disposed on the circuit board, each having a branched structure; a plurality of light sources disposed on the circuit board and electrically connected to the first copper foil and the plurality of second copper foils; A light source substrate having a branched layout structure, characterized in that the branched structure of each of the second copper foils and the branched structure of an adjacent second copper foil are arranged alternately.

2. The light source substrate having a branched layout structure according to claim 1 , wherein the branched structure of each of the second copper foils is tree-shaped.

3. A light source substrate having a branched layout structure as described in claim 1, characterized in that the branched structure of each of the second copper foils has a main extension portion and multiple branch portions, the main extension portion is connected to the second copper foil, and the multiple branch portions are connected to the main extension portion.

4. 4. A light source substrate having a branched layout structure as described in claim 3, characterized in that each branch portion of the branched structure of each of the second copper foils is adjacent to at least one branch portion of the branched structure of an adjacent second copper foil, or is located between two branch portions of the branched structure of an adjacent second copper foil.

5. 5. The light source substrate having a branched layout structure according to claim 4, wherein the extending direction of the main extending portion and the extending direction of the plurality of branch portions are perpendicular to each other.

6. 5. The light source substrate with a branch layout structure according to claim 4, wherein an angle is formed between the extension direction of the main extension portion and the extension direction of the plurality of branch portions, and the angle is greater than or less than 90 degrees.

7. 2. The light source substrate having a branched layout structure according to claim 1, wherein each of the light sources is electrically connected to the first copper foil and one of the second copper foils via a positive electrode pad and a negative electrode pad, or is electrically connected to two of the plurality of second copper foils via the positive electrode pad and a negative electrode pad.

8. The light source substrate having a branched layout structure according to claim 1 , wherein the plurality of light sources are light-emitting diodes.

9. The light source substrate having a branched layout structure according to claim 1 , wherein the first copper foil and the plurality of second copper foils are electrically connected to a power source.

10. The circuit board is characterized in that it is a rigid circuit board or a flexible circuit board. A light source substrate having the branched layout structure according to claim 1 .

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