Highly compatible direct current light source board

Abstract

A high compatibility direct current light source board includes a board body, a first direct current conductor, a second direct current conductor, a first light source conductor, a second light source conductor and a plurality of light sources. The first direct current conductor is arranged on the board body and connected with a positive pole of a rectifier circuit of a driving power source. The second direct current conductor is arranged on the board body and connected with a negative pole of the rectifier circuit. The first light source conductor is arranged on the board body and connected with a positive pole of a constant current circuit of the driving power source. The second light source conductor is arranged on the board body and connected with a negative pole of the constant current circuit of the driving power source. The plurality of light sources are arranged on the board body and connected with the first light source conductor and the second light source conductor.

Description

Technical Field

[0001] This invention relates to a light source board, and more particularly to a highly compatible DC light source board. Background Technology

[0002] The design of commercially available lighting fixtures (such as fluorescent tubes) compatible with electronic ballasts requires a thorough safety assessment in case of malfunctions during ballast operation. Since most existing lighting fixtures use printed circuit boards (PCBs) or flexible printed circuit boards (FPCBs) for their light source boards, and these boards carry AC signals, the copper-clad conductors on these boards are prone to open circuits or sparks from scratches, potentially leading to fires. Therefore, the safety of existing circuit boards needs improvement.

[0003] To address these issues, some lighting fixtures utilize flame-retardant metal printed circuit boards or double-sided flexible metal printed circuit boards. While these boards can alleviate the problems to some extent, they also significantly increase the cost of the lighting fixtures. Summary of the Invention

[0004] According to an embodiment of the present invention, a highly compatible DC light source board is provided, comprising a board body, a first DC conductor, a second DC conductor, a first light source conductor, a second light source conductor, and multiple light sources. The first DC conductor is disposed on the board body and connected to the positive terminal of the rectifier circuit of the driving power supply. The second DC conductor is disposed on the board body and connected to the negative terminal of the rectifier circuit. The first light source conductor is disposed on the board body and connected to the positive terminal of the constant current circuit of the driving power supply. The second light source conductor is disposed on the board body and connected to the negative terminal of the constant current circuit of the driving power supply. Multiple light sources are disposed on the board body and connected to the first light source conductor and the second light source conductor.

[0005] In one embodiment, the first light source conductor and the second light source conductor are disposed between the first DC conductor and the second DC conductor.

[0006] In one embodiment, the first DC conductor has a first groove. The first groove extends in a direction away from the centerline of the plate.

[0007] In one embodiment, the second DC conductor has a second groove. The second groove extends in a direction away from the centerline of the plate.

[0008] In one embodiment, the first light source conductor has a first protrusion. The first protrusion extends in a direction away from the centerline of the plate.

[0009] In one embodiment, the second light source conductor has a second protrusion. The second protrusion extends in a direction away from the centerline of the plate.

[0010] In one embodiment, a plurality of isolation regions are provided between the first light source conductor and the second light source conductor. The plurality of isolation regions are distributed on both sides of the plurality of light sources.

[0011] In one embodiment, the plate is a flexible plate or a rigid plate.

[0012] In one embodiment, the plurality of light sources are light-emitting diodes.

[0013] As described above, the highly compatible DC light source board according to embodiments of the present invention may have one or more of the following advantages:

[0014] (1) In one embodiment of the present invention, the DC light source board includes a board body, a first DC conductor, a second DC conductor, a first light source conductor, a second light source conductor, and multiple light sources. The first DC conductor is disposed on the board body and connected to the positive terminal of the rectifier circuit of the driving power supply. The second DC conductor is disposed on the board body and connected to the negative terminal of the rectifier circuit. The first light source conductor is disposed on the board body and connected to the positive terminal of the constant current circuit of the driving power supply. The second light source conductor is disposed on the board body and connected to the negative terminal of the constant current circuit of the driving power supply. Multiple light sources are disposed on the board body and connected to the first light source conductor and the second light source conductor. As can be seen from the above, the first DC conductor, the second DC conductor, the first light source conductor, and the second light source conductor of the DC light source board all carry DC signals. Therefore, when the DC light source board is broken or scratched due to various reasons, the DC light source board can be transformed from a single conductor into two equivalent capacitors formed by two electrodes carrying DC signals. After being fully charged, the two equivalent capacitors will block the DC signal to prevent fire caused by temperature rise. Therefore, the safety of the DC light source board can be effectively improved without increasing the cost of the DC light source board. In addition, the DC light source board is compatible with electronic ballasts.

[0015] (2) In one embodiment of the present invention, a first light source conductor and a second light source conductor are disposed between a first DC conductor and a second DC conductor. The first DC conductor has a first groove that extends away from the center line of the plate. The second DC conductor has a second groove that extends away from the center line of the plate. The first light source conductor has a first protrusion that extends away from the center line of the plate. The second light source conductor has a second protrusion that extends away from the center line of the plate. This special conductor structure design optimizes the capacitance effect and effectively prevents sparks by destroying the integrity of the scratch when it occurs. Therefore, the safety of the DC light source board can be further improved.

[0016] (3) In one embodiment of the present invention, a plurality of isolation regions are provided between the first light source conductor and the second light source conductor, and the plurality of isolation regions are distributed on both sides of the plurality of light sources. The above-mentioned special isolation region structure design can provide a certain barrier effect to reduce the impact of open circuits or scratches on the plurality of light sources, and improve the impedance of the plurality of light sources to surrounding conductors when abnormal conditions occur. In addition, the above-mentioned special isolation region structure design can also make scratches discontinuous to prevent spark generation and improve the effect of blocking DC signals. Therefore, the safety of the DC light source board can be further improved.

[0017] (4) In one embodiment of the present invention, the board body of the DC light source board can be a flexible printed circuit board (FPCB) or a rigid printed circuit board (PCB). Therefore, users can choose a suitable material according to the actual application requirements. Thus, the DC light source board can be applied to a variety of different lighting devices, making it more flexible in use and more widely applicable.

[0018] (5) In one embodiment of the present invention, the DC light source board has a simple design, thus achieving the desired effect without increasing costs. Furthermore, the DC light source board offers high compatibility (compatible with electronic ballasts). Therefore, the DC light source board is highly practical and can meet the needs of various applications. Attached Figure Description

[0019] Figure 1 This is a first schematic diagram of the structure of a highly compatible DC light source board according to an embodiment of the present invention.

[0020] Figure 2 This is a second schematic diagram of the structure of a highly compatible DC light source board according to an embodiment of the present invention.

[0021] Figure 3 This is a third schematic diagram of the structure of a highly compatible DC light source board according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-DC light source board; 11-Board body; 12-First DC conductor; 13-Second DC conductor; 14-First light source conductor; 15-Second light source conductor; 16-Light source; S1-First groove; S2-Second groove; P1-First protrusion; P2-Second protrusion; BA-Isolation area; ML-Center line of the board body.

[0024] The following detailed description of the features and advantages of the present invention is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the content disclosed in this specification, the claims and drawings, anyone skilled in the art can easily understand the purpose and advantages of this creation. Detailed Implementation

[0025] The following description, with reference to the accompanying drawings, illustrates embodiments of the highly compatible DC light source board according to the present invention. For clarity and ease of illustration, the dimensions and proportions of the components in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is referred to as "connected" or "coupled" to another component, it may be directly connected or coupled to that other component or there may be an intervening component; when a component is referred to as "directly connected" or "directly coupled" to another component, there is no intervening component. Other terms used to describe the relationship between components or layers should be interpreted in the same manner. For ease of understanding, the same components in the following embodiments are indicated by the same symbols.

[0026] Please see Figure 1 This is a first schematic diagram of the structure of a highly compatible DC light source board according to an embodiment of the present invention. As shown in the figure, the DC light source board 1 includes a board body 11, a first DC conductor 12, a second DC conductor 13, a first light source conductor 14, a second light source conductor 15, and a plurality of light sources 16.

[0027] A first DC conductor 12 is disposed on the board 11 and connected to the positive terminal of the rectifier circuit of the driving power supply. One end of the first DC conductor 12 can be connected to the positive output terminal of the rectifier circuit of the driving power supply, and the other end of the first DC conductor 12 can be connected to the positive input terminal of the rectifier circuit of the driving power supply. In one embodiment, the board 11 can be a rigid board. In another embodiment, the board 11 can be a flexible board.

[0028] The second DC conductor 13 is disposed on the plate 11 and connected to the negative terminal of the rectifier circuit. One end of the second DC conductor 13 can be connected to the negative output terminal of the rectifier circuit of the drive power supply, and the other end of the second DC conductor 13 can be connected to the negative input terminal of the rectifier circuit of the drive power supply.

[0029] The first light source conductor 14 is disposed on the plate 11 and connected to the positive terminal of the constant current circuit of the driving power supply. The first light source conductor 14 is disposed between the first DC conductor 12 and the second DC conductor 13.

[0030] The second light source conductor 15 is disposed on the plate 11 and connected to the negative terminal of the constant current circuit of the driving power supply. The second light source conductor 15 is disposed between the first DC conductor 12 and the second DC conductor 13, and is adjacent to the first light source conductor 14. The first DC conductor 12, the second DC conductor 13, the first light source conductor 14, and the second light source conductor 15 can all be copper-clad conductors or other metal conductors.

[0031] The aforementioned plurality of light sources 16 are disposed on the plate 11 and connected to the first light source conductor 14 and the second light source conductor 15. The aforementioned plurality of light sources 16 may be light-emitting diodes (LEDs).

[0032] As described above, the DC light source board 1 includes a board body 11, a first DC conductor 12, a second DC conductor 13, a first light source conductor 14, a second light source conductor 15, and multiple light sources 16. The first DC conductor 12 and the second DC conductor 13 are connected to the rectifier circuit of the drive power supply, while the first light source conductor 14 and the second light source conductor 15 are connected to the constant current circuit of the drive power supply. Thus, the DC light source board 1 is compatible with electronic ballasts. Furthermore, the first DC conductor 12, the second DC conductor 13, the first light source conductor 14, and the second light source conductor 15 of the DC light source board 1 all carry DC signals. Therefore, if the DC light source board 1 experiences an open circuit or scratches due to various reasons, the DC light source board 1 can be transformed from a single conductor into two equivalent capacitors. These two equivalent capacitors, when fully charged, will block the DC signal to prevent fires caused by temperature increases. Therefore, the safety of the DC light source board 1 can be effectively improved without increasing its cost.

[0033] When the existing light source board is damaged by an open circuit or scratch, the AC signal will flow through the copper-clad conductor, turning the original single conductor into two electrodes with AC voltage. Due to the inherent capacitive effect of the AC signal, the open location of the copper-clad conductor creates two electrodes and a gap between them, forming an equivalent standard capacitor. The AC signal can pass between the two electrodes, and the current is determined by the capacitive reactance. The capacitive reactance can be expressed by the following equation (1):

[0034] Xc=1 / (2πfC)…………(1)

[0035] Where Xc represents capacitive reactance; f represents the frequency of the AC signal; and C represents the capacitance of the capacitor.

[0036] As shown in equation (1), capacitive reactance is inversely proportional to the frequency of the AC signal and the capacitance of the capacitor. During the coupling process, due to the very close distance between the two electrodes, the capacitor initially exhibits low withstand voltage. When the voltage across the electrodes is sufficiently high, visible arcing occurs. As the arcing continues, the gap material between the electrodes is carbonized at high temperature. After carbonization, the original gap between the electrodes is filled with carbonized material, and the capacitance of the equivalent capacitor increases. According to equation (1), with the AC signal frequency remaining constant, the larger the capacitance, the smaller the capacitive reactance, and thus the current coupled through the equivalent capacitance increases. Therefore, the temperature between the two electrodes continues to rise, further enhancing the carbonization reaction, and thus the capacitance of the capacitor continues to increase, forming positive feedback. As the carbonization area continues to increase until the distance between the two electrodes is sufficiently large, the equivalent capacitance withstand voltage continues to increase, the capacitance gradually decreases, the current coupled through the capacitor decreases, and the heat generated gradually decreases until the temperature is no longer high enough to produce an open flame or the carrier glass of the light source board burns through and cracks due to the inability to withstand the high temperature, thus interrupting the entire positive feedback process.

[0037] In contrast, in this embodiment, the first DC conductor 12, the second DC conductor 13, the first light source conductor 14, and the second light source conductor 15 of the DC light source board 1 all carry DC signals. Therefore, when the DC light source board 1 experiences an open circuit or scratches due to various reasons, the DC light source board 1 can be transformed from a single conductor into two equivalent capacitors formed by two electrodes carrying DC signals. These two equivalent capacitors, once fully charged, will block the DC signal to prevent fires caused by temperature increases. Therefore, the safety of the DC light source board 1 can be effectively improved without increasing its cost.

[0038] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the high-compatibility DC light source board 1 according to this embodiment should still be included within the patent scope of the invention.

[0039] Please see Figure 2 This is a second schematic diagram of the structure of a highly compatible DC light source board according to an embodiment of the present invention. As shown, the first DC conductor 12 has a first groove S1, and the first groove S1 extends in a direction away from the center line ML of the board body 11. The second DC conductor 13 has a second groove S2, and the second groove S2 extends in a direction away from the center line ML of the board body 11. The first light source conductor 14 has a first protrusion P1, and the first protrusion P1 extends in a direction away from the center line ML of the board body 11. The second light source conductor 15 has a second protrusion P2, and the second protrusion P2 extends in a direction away from the center line ML of the board body.

[0040] The aforementioned special conductor structure design optimizes the capacitance effect and effectively disrupts the integrity of the scratch when it occurs, preventing spark generation. Therefore, the safety of the DC light source board 1 can be further improved.

[0041] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the high-compatibility DC light source board 1 according to this embodiment should still be included within the patent scope of the invention.

[0042] In another embodiment, there are multiple isolation zones between the first light source conductor 14 and the second light source conductor 15.

[0043] It is worth mentioning that, since most existing lighting devices use printed circuit boards (PCBs) or flexible printed circuit boards (FPCBs) for their light source boards, and AC signals flow through these boards, the wires (copper-clad wires) on these two types of circuit boards are prone to breakage or sparks due to scratches, ultimately leading to fires. Therefore, the safety of existing circuit boards needs to be improved. To solve the above problems, some lighting devices use metal printed circuit boards with flame-retardant properties or double-sided metal flexible printed circuit boards. While these circuit boards can solve the above problems to some extent, they also significantly increase the cost of the lighting device. In contrast, according to an embodiment of the present invention, the DC light source board 1 includes a board body 11, a first DC conductor 12, a second DC conductor 13, a first light source conductor 14, a second light source conductor 15, and a plurality of light sources 16. The first DC conductor 12 is disposed on the board body 11 and connected to the positive terminal of the rectifier circuit of the driving power supply. The second DC conductor 13 is disposed on the board body 11 and connected to the negative terminal of the rectifier circuit. The first light source conductor 12 is disposed on the board body 11 and connected to the positive terminal of the constant current circuit of the driving power supply. The second light source conductor 15 is disposed on the plate 11 and connected to the negative terminal of the constant current circuit of the driving power supply. Multiple light sources 16 are disposed on the plate 11 and connected to the first light source conductor 12 and the second light source conductor 15. As can be seen from the above, the first DC conductor 12, the second DC conductor 13, the first light source conductor 14, and the second light source conductor 15 of the DC light source board 1 all carry DC signals. Therefore, when the DC light source board 1 experiences an open circuit or scratches due to various reasons, the DC light source board 1 can be transformed from a single conductor into two equivalent capacitors formed by two electrodes carrying DC signals. These two equivalent capacitors, after being fully charged, will block the DC signal to prevent fires caused by temperature increases. Therefore, the safety of the DC light source board 1 can be effectively improved without increasing its cost. Furthermore, the DC light source board 1 is compatible with electronic ballasts.

[0044] Furthermore, according to an embodiment of the present invention, a first light source conductor 14 and a second light source conductor 15 are disposed between a first DC conductor 12 and a second DC conductor 13. The first DC conductor 12 has a first groove S1 extending in a direction away from the center line ML of the plate. The second DC conductor has a second groove S2 extending in a direction away from the center line ML of the plate. The first light source conductor 14 has a first protrusion P1 extending in a direction away from the center line ML of the plate. The second light source conductor 14 has a second protrusion P2 extending in a direction away from the center line ML of the plate. This special conductor structure design optimizes the aforementioned capacitance effect and effectively prevents sparks by disrupting the integrity of the scratch when it occurs. Therefore, the safety of the DC light source board 1 can be further improved.

[0045] Furthermore, according to an embodiment of the present invention, a plurality of isolation regions BA are provided between the first light source conductor 14 and the second light source conductor 15, and the plurality of isolation regions BA are distributed on both sides of the plurality of light sources 16. This special isolation region BA structure design can provide a certain degree of barrier effect, reducing the impact on the plurality of light sources 16 when open circuits or scratches occur, and improving the impedance of the plurality of light sources 16 to surrounding conductors when abnormal conditions occur. In addition, the special isolation region BA structure design can also make scratches discontinuous to prevent spark generation and improve the effect of blocking DC signals. Therefore, the safety of the DC light source board 1 can be further improved.

[0046] Furthermore, according to embodiments of the present invention, the board body 11 of the DC light source board 1 can be a flexible printed circuit board (FPCB) or a rigid printed circuit board (PCB). Therefore, users can select suitable materials according to the needs of their actual applications. Thus, the DC light source board 1 can be applied to various lighting devices, offering greater flexibility and wider applicability.

[0047] Furthermore, according to embodiments of the present invention, the DC light source board 1 has a simple design, thus achieving the desired effect without increasing costs. In addition, the DC light source board 1 achieves high compatibility (compatible with electronic ballasts). Therefore, the DC light source board 1 achieves high practicality and can meet the needs of different applications. As can be seen from the above, the highly compatible DC light source board according to embodiments of the present invention can indeed achieve excellent technical results.

[0048] Please see Figure 3 This is a third schematic diagram of the structure of a high-compatibility DC light source board according to an embodiment of the present invention. As shown in the figure, there are multiple isolation regions BA between the first light source conductor 14 and the second light source conductor 15, and the multiple isolation regions BA are distributed on both sides of the multiple light sources 1.

[0049] As described above, in this embodiment, the first light source conductor 14 and the second light source conductor 15 are provided with the aforementioned multiple isolation regions BA, and these multiple isolation regions are distributed on both sides of the multiple light sources 16. This special isolation region structure design can provide a certain degree of barrier effect, reducing the impact of open circuits or scratches on the multiple light sources 16, and increasing the impedance of the multiple light sources 16 to surrounding conductors when abnormal conditions occur. Furthermore, the special isolation region BA structure design can also make scratches discontinuous to prevent spark generation and improve the effect of blocking DC signals. Therefore, the safety of the DC light source board 1 can be further improved.

[0050] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the high-compatibility DC light source board 1 according to this embodiment should still be included within the patent scope of the invention.

[0051] In summary, according to an embodiment of the present invention, the DC light source board 1 includes a board body 11, a first DC conductor 12, a second DC conductor 13, a first light source conductor 14, a second light source conductor 15, and a plurality of light sources 16. The first DC conductor 12 is disposed on the board body 11 and connected to the positive terminal of the rectifier circuit of the driving power supply. The second DC conductor 13 is disposed on the board body 11 and connected to the negative terminal of the rectifier circuit. The first light source conductor 12 is disposed on the board body 11 and connected to the positive terminal of the constant current circuit of the driving power supply. The second light source conductor 15 is disposed on the board body 11 and connected to the negative terminal of the constant current circuit of the driving power supply. The plurality of light sources 16 are disposed on the board body 11 and connected to the first light source conductor 12 and the second light source conductor 15. As can be seen from the above, the first DC conductor 12, the second DC conductor 13, the first light source conductor 14, and the second light source conductor 15 of the DC light source board 1 all carry DC signals. Therefore, when the DC light source board 1 experiences an open circuit or scratches due to various reasons, it can be transformed from a single conductor into two equivalent capacitors formed by two electrodes carrying DC current. These two equivalent capacitors, once fully charged, will block the DC signal to prevent fires caused by temperature increases. Thus, the safety of the DC light source board 1 can be effectively improved without increasing its cost. Furthermore, the DC light source board 1 is compatible with electronic ballasts.

[0052] Furthermore, according to an embodiment of the present invention, a first light source conductor 14 and a second light source conductor 15 are disposed between a first DC conductor 12 and a second DC conductor 13. The first DC conductor 12 has a first groove S1 extending in a direction away from the center line ML of the plate. The second DC conductor has a second groove S2 extending in a direction away from the center line ML of the plate. The first light source conductor 14 has a first protrusion P1 extending in a direction away from the center line ML of the plate. The second light source conductor 14 has a second protrusion P2 extending in a direction away from the center line ML of the plate. This special conductor structure design optimizes the aforementioned capacitance effect and effectively prevents sparks by disrupting the integrity of the scratch when it occurs. Therefore, the safety of the DC light source board 1 can be further improved.

[0053] Furthermore, according to an embodiment of the present invention, a plurality of isolation regions BA are provided between the first light source conductor 14 and the second light source conductor 15, and the plurality of isolation regions BA are distributed on both sides of the plurality of light sources 16. This special isolation region BA structure design can provide a certain degree of barrier effect, reducing the impact on the plurality of light sources 16 when open circuits or scratches occur, and improving the impedance of the plurality of light sources 16 to surrounding conductors when abnormal conditions occur. In addition, the special isolation region BA structure design can also make scratches discontinuous to prevent spark generation and improve the effect of blocking DC signals. Therefore, the safety of the DC light source board can be further improved.

[0054] Furthermore, according to embodiments of the present invention, the board body 11 of the DC light source board 1 can be a flexible printed circuit board (FPCB) or a rigid printed circuit board (PCB). Therefore, users can select suitable materials according to the needs of their actual applications. Thus, the DC light source board 1 can be applied to various lighting devices, offering greater flexibility and wider applicability.

[0055] Furthermore, according to embodiments of the present invention, the DC light source board 1 has a simple design, thus achieving the desired effect without increasing costs. In addition, the DC light source board 1 achieves high compatibility (compatible with electronic ballasts). Therefore, the DC light source board 1 achieves high practicality and can meet the needs of various applications.

[0056] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A highly compatible DC light source board, characterized in that, include: plate body; A first DC conductor is disposed on the plate and connected to the positive terminal of the rectifier circuit of the driving power supply. The first DC conductor has a first groove that extends in a direction away from the center line of the plate. A second DC conductor is disposed on the plate and connected to the negative terminal of the rectifier circuit. The second DC conductor has a second groove that extends in a direction away from the center line of the plate. A first light source conductor is disposed on the plate and connected to the positive terminal of the constant current circuit of the driving power supply. The first light source conductor has a first protrusion that extends in a direction away from the center line of the plate. A second light source conductor is disposed on the plate and connected to the negative terminal of the constant current circuit of the driving power supply. The second light source conductor has a second protrusion that extends away from the center line of the plate. as well as Multiple light sources are disposed on the plate and connected to the first light source conductor and the second light source conductor.

2. The high-compatibility DC light source board as described in claim 1, characterized in that, The first light source conductor and the second light source conductor are disposed between the first DC conductor and the second DC conductor.

3. The high-compatibility DC light source board as described in claim 1, characterized in that, There are multiple isolation regions between the first light source conductor and the second light source conductor, and the multiple isolation regions are distributed on both sides of the multiple light sources.

4. The high-compatibility DC light source board as described in claim 1, characterized in that, The board is a flexible board.

5. The high-compatibility DC light source board as described in claim 1, characterized in that, The plate is a rigid plate.

6. The high-compatibility DC light source board as described in claim 1, characterized in that, The multiple light sources are light-emitting diodes (LEDs).

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