Light source driver board, light source module and electronic equipment

Abstract

The present application discloses a light source driving board, a light source module and an electronic device, and relates to the field of circuit design technology, wherein the light source driving board includes a substrate, a signal terminal and an electrostatic protection component: a circuit module is arranged on the substrate; the signal terminal is arranged on the substrate, and the signal terminal is electrically connected to the circuit module; the electrostatic protection component is arranged on the substrate, and the electrostatic protection component is electrically connected to the signal terminal; the electrostatic protection component includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern arranged on the substrate. The light source driving board provided by the present application is intended to improve the working stability of the light source driving board in the optical module.

Description

Technical Field

[0001] The present application relates to the technical field of circuit design, and in particular to a light source driving board, a light source module and an electronic device. Background Art

[0002] The optical module in the prior art includes a lighting device and a light source driver board that drives the lighting device. Among them, since the light source driver board is responsible for controlling the operation of the lighting device, the stability of the light source driver board is directly related to whether the lighting device can work stably. This also puts higher requirements on the design of the light source driver board. Summary of the invention

[0003] The main purpose of the present application is to propose a light source driving board, a light source module and an electronic device, aiming to improve the working stability of the light source driving board in the optical module.

[0004] To achieve the above-mentioned purpose, the light source driving board proposed in the present application is applied to the light source module, and the light source driving board includes: A substrate, on which a circuit module is arranged; A signal terminal, the signal terminal being disposed on the substrate and electrically connected to the circuit module; An electrostatic protection component, the electrostatic protection component is disposed on the substrate, and the electrostatic protection component is electrically connected to the signal terminal; The electrostatic protection component includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern disposed on the substrate.

[0005] In one embodiment, the signal terminal includes at least one of a power terminal and a plug-in device port.

[0006] In one embodiment, the electrostatic protection component includes an electrostatic protection circuit; the signal terminal includes a power terminal; The power supply end includes a positive power supply end and a ground end, and the positive power supply end is connected to the power supply end of the circuit module; the electrostatic protection circuit includes: an electrostatic protection diode, a first end of the electrostatic protection diode is arranged in a path between the positive power supply end and the power supply end of the circuit module, and a second end of the electrostatic protection diode is connected to the ground end of the power supply end.

[0007] In one embodiment, the light source driving board also includes: a fuse and a first diode; the first end of the fuse is connected to the positive terminal of the power supply, the second end of the fuse is connected to the anode of the first diode, and the first end of the electrostatic protection diode is connected to the path between the fuse and the first diode.

[0008] In one embodiment, the substrate has a first side and a second side that are arranged opposite to each other; the electrostatic protection diode, the fuse and the first diode are all arranged on the first side or the second side; Alternatively, the electrostatic protection diode, the fuse and the first diode are respectively arranged on the first side and the second side.

[0009] In one embodiment, on the substrate, the second end of the fuse, the first end of the electrostatic protection diode, and the anode of the first diode are electrically connected in sequence.

[0010] In one embodiment, on the substrate, the second end of the fuse, the first end of the electrostatic protection diode and the anode of the first diode are arranged side by side in the same direction.

[0011] In one embodiment, on the substrate, a copper-clad area electrically connected to the first end of the fuse and a copper-clad area electrically connected to the anode of the first diode are isolated from each other.

[0012] In one embodiment, the signal terminal includes a power terminal, and the power terminal has a positive power wiring area and a negative power wiring area arranged on the substrate; A first pointed window is provided in the positive wiring area of ​​the power supply, and a second pointed window is provided in the negative wiring area of ​​the power supply; Wherein, the tip of the first tip window and the tip of the second tip window are arranged toward each other and aligned.

[0013] In one embodiment, a distance between the tips of the first apical fenestration and the second apical fenestration is less than 0.3 mm.

[0014] In one embodiment, a distance between the tips of the first tip fenestration and the second tip fenestration is greater than twice a minimum wiring distance.

[0015] In one embodiment, the tip of the first apical window and the tip of the second apical window are acute angles.

[0016] In one embodiment, an angle between the tip of the first apex window and the tip of the second apex window is not less than 30 degrees and not more than 60 degrees.

[0017] In one embodiment, the shapes of the first tip window and the second tip window are specifically triangular or teardrop-shaped.

[0018] In one embodiment, when the first tip window and the second tip window are triangles, the triangles are isosceles triangles, and the length of the base of the triangle is greater than 0.2 mm.

[0019] In one embodiment, the first tip window and the second tip window are configured as a tip window group; and a plurality of the tip window groups are arranged side by side on the substrate.

[0020] In one embodiment, the circuit module has a plurality of current branches; On the substrate, the grounding ends of the plurality of current branches are electrically connected to each other through the copper coating on the substrate, and the plurality of grounding ends are arranged close to each other on the substrate.

[0021] In one embodiment, the circuit module has at least one heating device, and on the substrate, the copper-clad area connected to the overcurrent pin in the heating device is the overcurrent copper-clad area; Among them, the width of the overcurrent copper clad area is greater than or equal to twice the preset current-carrying width; the preset current-carrying width is a rated width that meets the current requirement flowing through the overcurrent pin.

[0022] In one embodiment, the substrate has a first side and a second side that are arranged opposite to each other, the overcurrent copper clad area is arranged on one of the first side and the second side of the substrate, and a window portion is arranged on the other side at a position corresponding to the overcurrent copper clad area; The window portion is provided with at least one through hole penetrating the first side and the second side.

[0023] In one embodiment, the via hole is filled with a metal heat dissipation material.

[0024] The present application also provides a light source module, which includes: a light source driving board as described in any one of the above items; and a lighting device, wherein the light source driving board is drivingly connected to the lighting device.

[0025] The present application also provides an electronic device, comprising: a light source driving board as described in any one of the above, or a light source module as described in the above.

[0026] The present application provides a light source driving board, which includes a substrate, a circuit module arranged on the substrate, and a signal terminal, wherein the signal terminal is connected to an electrostatic protection component. The electrostatic protection component includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern arranged on the substrate, thereby effectively improving the electrostatic protection capability of the light source driving board, thereby improving the working stability of the light source driving board.

[0027] At the same time, it is understandable that when the electrostatic protection component includes an electrostatic protection copper-clad pattern, it can replace the electrostatic protection device in the electrostatic protection circuit to achieve the release of part of the static electricity in the light source driving board. In this way, the number of electrostatic protection devices on the light source driving board is reduced, the volume of the light source driving board is reduced, and a certain cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of a first embodiment of a light source driving board provided in the present application; Figure 2 A schematic structural diagram of a second embodiment of a light source driving board provided in the present application; Figure 3 A schematic structural diagram of a third embodiment of a light source driving board provided in the present application; Figure 4 A schematic structural diagram of a fourth embodiment of a light source driving board provided in the present application; Figure 5 A schematic structural diagram of a fifth embodiment of a light source driving board provided in the present application; Figure 6 This is a structural schematic diagram of the sixth embodiment of the light source driving board provided in the present application.

[0030] Description of Figure Numbers: The light source driving board 10 , the substrate 100 , the circuit module 110 , the signal terminal 200 , the electrostatic protection component 300 , the positive power wiring area 410 , the first tip window 411 , the negative power wiring area 420 , and the second tip window 421 .

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] The optical module in the prior art includes a lighting device and a light source driver board that drives the lighting device. Among them, since the light source driver board is responsible for controlling the operation of the lighting device, the stability of the light source driver board is directly related to whether the lighting device can work stably. This also puts higher requirements on the design of the light source driver board.

[0036] In order to improve the working stability of the light source driver board in the optical module, such as Figure 1 As shown, the light source driving board 10 proposed in the present application is applied to the light source module, and the light source driving board 10 includes a substrate 100, a signal terminal 200 and an electrostatic protection component 300. A circuit module 110 is arranged on the substrate 100. The signal terminal 200 is arranged on the substrate 100, and the signal terminal 200 is electrically connected to the circuit module 110. The electrostatic protection component 300 is arranged on the substrate 100, and the electrostatic protection component 300 is electrically connected to the signal terminal 200. Among them, the electrostatic protection component 300 includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern arranged on the substrate 100.

[0037] In this embodiment, the substrate 100 is the basic structure of the light source driving board 10, providing physical support and electrical connection platform. The substrate 100 can be implemented by glass fiber board, metal substrate, ceramic substrate, etc. In this application, the substrate 100 not only carries all electronic components, but also integrates the electrostatic protection copper cladding pattern, which is conducive to improving the antistatic ability of the light source driving board 10.

[0038] In this embodiment, the signal terminal 200 refers to an interface or pin located on the substrate 100, which is used to receive command signals from an external controller and transmit these signals to the circuit module 110 on the light source driving board 10, or to access a power supply, or to directly access an external device, etc. In the present application, the signal terminal 200 is connected to the electrostatic protection component 300, thereby effectively improving the anti-static ability of the signal terminal to reduce the impact of static electricity on the circuit module 110 electrically connected thereto.

[0039] Optionally, the electrostatic protection component 300 includes an electrostatic protection circuit. In some examples, the electrostatic protection circuit may include various types of electrostatic protection devices, such as TVS diodes, Zener diodes, gas discharge tubes, and electrostatic protection diodes D2. It is understandable that the electrostatic protection device in the electrostatic protection circuit can release the static electricity of the light source driving board 10 to a certain extent, thereby reducing the impact of static electricity on the light source driving board 10 and improving the working stability of the light source driving board 10. Optionally, the electrostatic protection component 300 includes an electrostatic protection copper-clad pattern arranged on the substrate 100 to release static electricity to play an electrostatic protection role. In some examples, a special copper foil layout designed on the substrate 100 acts like a large ground plane, but has a specific geometric shape and position arrangement, which can be specifically referred to in subsequent embodiments. It is understandable that the electrostatic copper-clad pattern can be a window pattern on the copper clad. By designing the shape of the window, such as a sharp angle, the flow of static electricity can be effectively guided and static electricity can be released from the light source driving board 10. In this way, the static electricity of the light source driving board 10 can be released to a certain extent, thereby reducing the influence of static electricity on the light source driving board 10 and improving the working stability of the light source driving board 10. At the same time, the number of circuit components on the light source driving board 10 can also be reduced, for example, no static electricity protection components need to be provided, and the volume of the light source driving board 10 can be effectively reduced to achieve a miniaturized design.

[0040] In summary, the present application provides a light source driving board, which includes a substrate, a circuit module disposed on the substrate, and a signal terminal, wherein the signal terminal is connected to an electrostatic protection component. The electrostatic protection component includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern disposed on the substrate, thereby effectively improving the electrostatic protection capability of the light source driving board, and further improving the working stability of the light source driving board.

[0041] Optionally, there may be multiple signal terminals on the light source driver board, and the signal terminal 200 includes at least one of a power terminal and a plug-in device port. It is understandable that the signal terminal 200 may include a power terminal for providing voltage input, and may also include a plug-in device port that allows the user to easily insert or unplug external devices, such as connecting expansion modules such as sensors or controllers, thereby increasing the flexibility and scalability of the system, and may also be a power interface for accessing an external power supply device. It should be noted that both the power terminal and the plug-in device port are connected to the electrostatic protection component 300, so that when performing power connection or plug-in and unplug operations of external devices, timely and effective electrostatic protection can be provided, thereby ensuring the stability of the operation of the subsequent circuit module.

[0042] In one embodiment, if Figure 2 As shown, the electrostatic protection component 300 includes an electrostatic protection circuit; the signal terminal 200 includes a power supply terminal; the power supply terminal includes a positive power supply terminal and a ground terminal, and the positive power supply terminal is connected to the power supply terminal of the circuit module 110; the electrostatic protection circuit includes: an electrostatic protection diode D2, a first end of the electrostatic protection diode D2 is arranged in a path between the positive power supply terminal and the power supply terminal of the circuit module 110, and a second end of the electrostatic protection diode D2 is connected to the ground terminal of the power supply terminal.

[0043] In this embodiment, the light source driving board 10 also includes: a fuse F1 and a first diode D1; the first end of the fuse F1 is connected to the positive end of the power supply, the second end of the fuse F1 is connected to the anode of the first diode D1, and the first end of the electrostatic protection diode D2 is connected to the path between the fuse F1 and the first diode D1.

[0044] In this embodiment, the light source driving board 10 integrates an electrostatic protection diode D2, a fuse F1 and a first diode D1 to enhance the stability and safety of its power supply terminal. The signal terminal 200 includes a power supply terminal, which is further subdivided into a positive power supply terminal and a ground terminal, wherein the positive power supply terminal is directly connected to the power supply terminal of the circuit module 110. In order to provide electrostatic protection, the electrostatic protection diode D2, whose first end is located on the path between the positive power supply terminal and the power supply terminal of the circuit module 110, and the second end is connected to the ground terminal of the power supply terminal, thereby forming a fast-response discharge path, which can quickly guide the electrostatic energy to the ground line when an abnormally high voltage is detected, protect the sensitive circuit from damage, and improve the working stability of the light source driving board 10. In addition, in order to further improve the reliability of the system, the light source driving board 10 also integrates a fuse F1 and a first diode D1: the first end of the fuse F1 is connected to the positive power supply terminal, the second end is connected to the anode of the first diode D1, and the first end of the electrostatic protection diode D2 is connected to the path between the fuse F1 and the first diode D1. In this way, it is ensured that in the case of current overload or short circuit, the fuse F1 can be melted in time to cut off the current to prevent more serious hardware damage, and at the same time the first diode D1 prevents the inflow of reverse current to ensure the safe operation of the entire circuit. In summary, this embodiment not only improves the ability of the light source driving board 10 to resist static electricity, but also enhances its overall stability and reliability.

[0045] In one embodiment, if Figure 3 As shown, the substrate 100 has a first side and a second side that are arranged opposite to each other; the electrostatic protection diode D2, the fuse F1 and the first diode D1 are all arranged on the first side or the second side; or (not shown in the figure) the electrostatic protection diode D2, the fuse F1 and the first diode D1 are respectively arranged on the first side and the second side.

[0046] It can be understood that the substrate 100 of the light source driving board 10 optimizes space utilization and component layout to adapt to different circuit board sizes and design requirements. The substrate 100 has a first side and a second side that are relatively arranged. The electrostatic protection diode D2, the fuse F1 and the first diode D1 can all be arranged on the same side (i.e., the first side or the second side) to achieve a same-side layout; the same-side layout simplifies the manufacturing process and facilitates maintenance, and is suitable for situations where there is ample space on the circuit board. On the other hand, when the space on the circuit board is relatively tight, these components can also be arranged on the first side and the second side of the substrate 100 to form a non-planar layout. In this way, the double-sided space of the substrate 100 is effectively utilized, thereby reducing the space occupied by the light source driving board in the optical module.

[0047] It should be noted that by flexibly selecting the same-surface or different-surface settings, this embodiment can flexibly respond to space limitations and technical requirements in different application scenarios while ensuring electrostatic protection function and system safety, thereby improving the overall design flexibility and practicality of the light source driving board 10.

[0048] In one embodiment, if Figure 3 As shown, on the substrate 100 , the second end of the fuse F1 , the first end of the electrostatic protection diode D2 , and the anode of the first diode D1 are electrically connected in sequence.

[0049] It can be understood that in this embodiment, the design of the substrate 100 of the light source driving board 10 ensures that the electrical connection between the various components follows a clear and irreversible order: the second end of the fuse F1, the first end of the electrostatic protection diode D2 and the anode of the first diode D1 are electrically connected in sequence. Whether a jumper, a bonding wire or a copper-clad routing method is used on the substrate 100, this connection order must remain unchanged to ensure the stability of the circuit. Further, the current first passes through the fuse F1, and its second end is connected to the first end of the electrostatic protection diode D2; then, it continues to flow from the first end of the electrostatic protection diode D2 to the anode of the first diode D1. Such a design ensures that in any case, the fuse F1 can serve as the first line of defense, quickly melts when the current is overloaded or short-circuited, cuts off the current path, and prevents further damage. Next, the electrostatic protection diode D2 provides instant electrostatic discharge protection, quickly directs any abnormally high voltage to the ground wire, and protects subsequent circuits from electrostatic shock. Finally, the first diode D1 ensures that the current can only flow in one direction to prevent reverse current from posing a potential threat to the circuit. In this way, by strictly following this connection sequence, the stability of the light source driving board 10 is enhanced.

[0050] In one embodiment, on the substrate 100, the second end of the fuse F1, the first end of the electrostatic protection diode D2 and the anode of the first diode D1 are arranged side by side in the same direction. It can be understood that by arranging these three components side by side in order, the electrical connection path between them is ensured to be the shortest and most direct, reducing the complexity of the routing and potential signal interference. In addition, this layout method facilitates compact and orderly wiring. Whether using jumpers, bonding wires or copper-clad routing, it is easy to achieve the fixed order that the second end of the fuse F1 is first connected to the first end of the electrostatic protection diode D2 and then connected to the anode of the first diode D1. In this way, not only the safety and stability of the current path are guaranteed, but also the space of the substrate 100 is effectively utilized, adapting to the development trend of miniaturization and high-density integration of circuit boards.

[0051] In one embodiment, on the substrate 100, the copper-clad area electrically connected to the first end of the fuse F1 and the copper-clad area electrically connected to the anode of the first diode D1 are isolated from each other. The isolation may include: arranging the copper-clad areas of the two at a certain safety distance, or arranging an isolator between the copper-clad areas of the two, such as a metal isolator arranged on the substrate, a mechanical groove on the substrate, and a ground copper-clad area on the substrate. In this way, the risk of the fuse F1 being directly connected to the first diode D1 after the copper-clad area, which may cause the electrostatic protection component 300 to fail, can be reduced.

[0052] Optionally, the electrostatic protection component includes an electrostatic protection copper-clad pattern disposed on the substrate. Figure 4 As shown, the signal terminal 200 includes a power terminal, and the power terminal has a positive power wiring area 410 and a negative power wiring area 420 arranged on the substrate 100; a first pointed window 411 is arranged in the positive power wiring area 410, and a second pointed window 421 is arranged in the negative power wiring area 420; wherein the tip of the first pointed window 411 and the tip of the second pointed window 421 are arranged to face each other and are aligned.

[0053] It is understandable that the design of the first tip window 411 and the second tip window 421 utilizes the electric field concentration effect to promote static discharge. When there are protruding sharp parts on a conductor, the radius of curvature of these places is small, resulting in more dense distribution of charges in these areas, that is, the electric field concentration effect. When static charge accumulates in the positive power wiring area 410 and the negative power wiring area 420, the electric field strength in these areas will increase significantly due to the relative and aligned arrangement of the tips of the first tip window 411 and the second tip window 421. At this time, the charge tends to concentrate on the part with a larger curvature of the conductor, that is, the sharp edge or tip. Therefore, at the tip position of these window openings, the electric field becomes extremely strong, enough to overcome the insulating properties of the air and induce the tip discharge phenomenon. This discharge process provides a low impedance path for static electricity, allowing the charge to be quickly released to the ground through the shortest distance between the two points, thereby effectively preventing the damage that may be caused by static electricity accumulation. In this way, static electricity is released through the first tip window 411 and the second tip window 421, which simplifies the design of the circuit board and does not require the addition of a special static protection diode D2, which saves space and reduces costs, and contributes to the miniaturization and lightweight design of the product. Secondly, static electricity protection is carried out through physical structure rather than additional components, which reduces the risk caused by component failure and improves the overall reliability of the system.

[0054] In this embodiment, the positive power wiring area 410 and the negative power wiring area 420 are respectively paved with copper foils, and the first tip opening 411 and the second tip opening 421 can be respectively provided on the corresponding copper foils.

[0055] In one embodiment, the distance between the tips of the first tip window 411 and the second tip window 421 is less than 0.3 mm. It is understandable that the short distance design ensures effective electrostatic discharge even at a lower voltage, provides a low impedance path, and enables static charge to be quickly released to the ground through the shortest path, avoiding the problem of poor electrostatic discharge effect caused by excessive distance. Therefore, the distance setting of less than 0.3 mm improves the efficiency and reliability of electrostatic protection.

[0056] In one embodiment, the distance between the tips of the first tip window 411 and the second tip window 421 is greater than twice the minimum wiring distance. It is understandable that in order to avoid problems caused by repeated electrostatic discharge events at the two tip corners during long-term use. Each electrostatic discharge may leave a trace amount of conductive medium residue at these contact points. Over time, these residues gradually accumulate and may eventually form a permanent conductive path, causing circuit short circuits and system failures. Therefore, setting the distance between the tips to be greater than twice the minimum wiring distance can effectively reduce the possibility of the above problems, because the larger spacing reduces the possibility of conductive residues accumulating to a level sufficient to cause a short circuit.

[0057] In one embodiment, if Figure 4 As shown, the tip of the first pointed window 411 and the tip of the second pointed window 421 are acute angles.

[0058] It is understandable that by designing the tips of the first tip window 411 and the second tip window 421 as acute angles, the electric field concentration effect can be fully utilized, that is, the charge tends to concentrate at the part with larger curvature of the conductor, and a stronger electric field strength can be generated at the acute angle, thereby more effectively inducing the tip discharge phenomenon. In this way, the design of the acute angle reduces the breakdown voltage required for electrostatic discharge, and also promotes the rapid transfer of charge, so that static electricity can be quickly and reliably released to the ground through a low impedance path. On the other hand, the design of the acute angle helps to reduce the required space, which is beneficial to the miniaturization design of the light source driving board 10 while maintaining efficient electrostatic protection performance.

[0059] In one embodiment, an angle between the tip of the first tip window 411 and the tip of the second tip window 421 is not less than 30 degrees and not more than 60 degrees.

[0060] It is understandable that the tip angle of the first tip window 411 and the second tip window 421 should be no less than 30 degrees and no more than 60 degrees, so as to balance the effectiveness of electrostatic discharge and the reliability of long-term use. Too small an angle may lead to excessive concentration of the electric field, increase the risk of damage to the tip material or formation of conductive residues, and may cause short circuit failure; while too large an angle will weaken the electric field concentration effect and reduce the efficiency of electrostatic discharge. By setting the tip angle between 30 and 60 degrees, sufficient electric field strength is guaranteed to promote effective electrostatic discharge, while avoiding potential problems caused by too small an angle.

[0061] In one embodiment, the first tip window 411 and the second tip window 421 are specifically shaped as a triangle or a teardrop. It is understandable that, in addition to the triangle or teardrop shape, any other shape with a tip can also be used. The specific shape is not limited here, as long as the electric field concentration effect can be achieved.

[0062] In addition, the shapes of the first pointed window 411 and the second pointed window 421 can be the same or different, as long as both have a pointed portion. Figure 4 As shown, the first tip window 411 and the second tip window 421 are of the same shape and size, because the tip windows of the same shape and size can ensure the symmetry of the electric field distribution, which helps to maintain the uniformity and consistency of the electrostatic discharge path on the circuit board. In addition, the symmetrical design can also reduce the potential electromagnetic interference caused by the asymmetric electric field, thereby improving the electromagnetic compatibility performance of the entire system.

[0063] In this embodiment, if Figure 4 As shown, the first tip window 411 and the second tip window 421 are triangles, the triangles are isosceles triangles, and the length of the base of the triangle is greater than 0.2 mm. It can be understood that the design of the isosceles triangle ensures that the two tips have the same electric field concentration effect, promotes symmetrical and uniform charge distribution, and thus improves the consistency and efficiency of electrostatic discharge. At the same time, the provision that the base length is greater than 0.2 mm not only ensures sufficient space to form an effective electric field strength, but also avoids manufacturing difficulties or material defects that may be caused by too small a size. In this way, it helps to maintain the compactness of the circuit board layout, supports miniaturization design requirements, and can also improve the stability of the light source driving circuit.

[0064] In one embodiment, if Figure 4 As shown, the first tip window 411 and the second tip window 421 are arranged as a tip window group; a plurality of the tip window groups are arranged side by side on the substrate 100 .

[0065] It is understandable that the arrangement of multiple groups of the pointed window groups side by side on the substrate 100 not only optimizes the electrostatic discharge path, but also improves the electrostatic protection capability of the entire circuit board. By arranging multiple pointed window groups, multiple low-impedance discharge channels can be formed between the positive power wiring area 410 and the negative power wiring area 420, ensuring that static electricity can be quickly and evenly released to the ground. Even if a group of windows fails for some reason, other groups can continue to provide effective electrostatic protection.

[0066] like Figure 5 As shown, in one embodiment, the circuit module 110 has a plurality of current branches; on the substrate 100, the grounding terminals of the plurality of current branches are electrically connected to each other through the copper coating on the substrate 100, and the plurality of grounding terminals are arranged close to each other on the substrate 100. It can be understood that the circuit module 110 of the light source driving board 10 is designed to include a plurality of current branches to support different functional requirements or to achieve load distribution. In order to optimize performance and space utilization, the grounding terminals of these current branches are electrically connected to each other through the copper coating on the substrate 100, and the grounding terminals are arranged close to each other on the substrate 100. In this way, the signal quality can be improved and electromagnetic interference can be reduced. In addition, the centralized arrangement of the plurality of grounding terminals can promote better heat conduction, help heat dissipation, and further improve the reliability and stability of the entire circuit module 110.

[0067] In one embodiment, the circuit module 110 has at least one heating device, and on the substrate 100, the copper clad area connected to the overcurrent pin in the heating device is the overcurrent copper clad area; wherein the width of the overcurrent copper clad area is greater than or equal to twice the preset current-carrying width; the preset current-carrying width is the rated width that meets the current requirement of the overcurrent pin.

[0068] It is understandable that in order to effectively manage heat generation and ensure the reliability of current transmission, the copper-clad area on the substrate 100 connected to the overcurrent pin in the heat generating device is specially designed as an overcurrent copper-clad area. Figure 6 As shown, the heating device can be a transistor, and the overcurrent pins can be the two conducting ends of the transistor. Figure 6 In the circuit, the second pin and the third pin are the overcurrent pins of the transistor, and the first pin is the control pin. Therefore, copper plating at the second pin and the third pin can effectively enhance the heat dissipation performance of the overcurrent pin. The width of the copper plating area is set to be greater than or equal to twice the preset current-carrying width, where the preset current-carrying width refers to the rated width that meets the current requirements of the overcurrent pin. By increasing the width of the overcurrent copper plating area, not only can the resistance be significantly reduced and the heat generation caused by excessive current be reduced, but also the heat dissipation effect can be enhanced to prevent the impact of local overheating on device performance and life.

[0069] It should be noted that the rated width may be determined according to actual application conditions, and may be determined according to the specific size of the required current. Normally, the greater the current requirement, the greater the rated width.

[0070] In one embodiment, the substrate has a first side and a second side that are arranged opposite to each other, the overcurrent copper clad area is arranged on one of the first side and the second side of the substrate 100, and a window portion is arranged at a position corresponding to the overcurrent copper clad area on the other side; the window portion is provided with at least one via hole that passes through the first side and the second side.

[0071] Optionally, the via hole is filled with metal heat dissipation material.

[0072] It is understandable that the substrate 100 has a first side and a second side that are arranged opposite to each other, wherein the overcurrent copper clad area is arranged on one of the first side or the second side, and a window portion is arranged at a corresponding position on the other side. The window portion not only reduces the weight of the substrate 100, but also provides a direct path for heat dissipation, thereby improving the heat dissipation efficiency. Furthermore, at least one via hole that passes through the first side and the second side is arranged on the window portion, and these via holes can be filled with metal heat dissipation materials (such as thermal grease, copper pillars or other high thermal conductivity materials) to enhance the thermal conductivity performance.

[0073] The present application also provides a light source module, the light source module includes a light source driving board 10 and a lighting device, the light source driving board 10 is drivingly connected to the lighting device. It should be noted that the specific structure of the light source driving board 10 refers to the above embodiment, and since the present light source module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0074] Optionally, in some examples, the light source module can be applied to any device that utilizes a light source, such as a smart wearable device, such as AR glasses / headsets, VR glasses / headsets, smart bracelets, smart rings, etc. In some examples, the light source module can also be applied to industrial processing equipment, medical instruments, optical communication systems, laser printers, barcode scanners, or any application device that requires a light source.

[0075] It can be understood that the light source driving board 10 is connected to the lighting device driving device. Since the light source driving board 10 has the characteristic of high stability, after the light source driving board 10 is applied to the light source module, the light source module also has the characteristic of high stability.

[0076] The present application also provides an electronic device, which includes a light source driving board 10 or a light source module. It should be noted that the specific structures of the light source driving board 10 and the light source module refer to the above embodiments. Since the electronic device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0077] In this embodiment, optionally, the electronic device includes a smart wearable device, such as AR glasses / head-mounted display, VR glasses / head-mounted display, MR glasses / head-mounted display and XR glasses / head-mounted display, smart bracelets, smart watches, smart rings, etc. In some examples, the light source driver board 10 or the light source module can be arranged in the optical-mechanical module of the smart wearable device to improve the working stability of the optical-mechanical module. Optionally, the electronic device may also include other projection devices, such as a projector, etc. In some examples, the light source driver board 10 or the light source module can be arranged in the projection module in the above-mentioned projection device to improve the stability of the projection device.

[0078] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A light source driving board, characterized in that: Applied to the light source module, the light source driving board includes: A substrate, on which a circuit module is arranged; A signal terminal, the signal terminal being disposed on the substrate and electrically connected to the circuit module; An electrostatic protection component, the electrostatic protection component is disposed on the substrate, and the electrostatic protection component is electrically connected to the signal terminal; The electrostatic protection component includes at least one of an electrostatic protection circuit and an electrostatic protection copper-clad pattern disposed on the substrate.

2. The light source driving board according to claim 1, characterized in that: The signal terminal includes at least one of a power terminal and a plug-in device port.

3. The light source driving board according to claim 2, characterized in that: The electrostatic protection component includes an electrostatic protection circuit; the signal terminal includes a power supply terminal; The power supply end includes a positive power supply end and a ground end, and the positive power supply end is connected to the power supply end of the circuit module; The electrostatic protection circuit includes: an electrostatic protection diode, a first end of the electrostatic protection diode is arranged in a path between the positive end of the power supply and the power end of the circuit module, and a second end of the electrostatic protection diode is connected to a ground end of the power end.

4. The light source driving board according to claim 3, characterized in that: The light source driving board also includes: a fuse and a first diode; the first end of the fuse is connected to the positive terminal of the power supply, the second end of the fuse is connected to the anode of the first diode, and the first end of the electrostatic protection diode is connected to the path between the fuse and the first diode.

5. The light source driving board according to claim 4, characterized in that: The substrate has a first side and a second side arranged opposite to each other; the electrostatic protection diode, the fuse and the first diode are all arranged on the first side or the second side; Alternatively, the electrostatic protection diode, the fuse and the first diode are respectively arranged on the first side and the second side.

6. The light source driving board according to claim 4, characterized in that: On the substrate, the second end of the fuse, the first end of the electrostatic protection diode and the anode of the first diode are electrically connected in sequence.

7. The light source driving board according to claim 6, characterized in that: On the substrate, the second end of the fuse, the first end of the electrostatic protection diode and the anode of the first diode are arranged side by side in the same direction.

8. The light source driving board according to claim 4, characterized in that: On the substrate, a copper-clad area electrically connected to the first end of the fuse and a copper-clad area electrically connected to the anode of the first diode are isolated from each other.

9. The light source driving board according to claim 2, characterized in that: The signal terminal includes a power supply terminal, and the power supply terminal has a positive power supply wiring area and a negative power supply wiring area arranged on the substrate; A first pointed window is provided in the positive wiring area of ​​the power supply, and a second pointed window is provided in the negative wiring area of ​​the power supply; Wherein, the tip of the first tip window and the tip of the second tip window are arranged toward each other and aligned.

10. The light source driving board according to claim 9, characterized in that: The distance between the tips of the first apical fenestration and the second apical fenestration is less than 0.3 mm.

11. The light source driving board according to claim 10, characterized in that: A distance between the tips of the first tip fenestration and the second tip fenestration is greater than twice a minimum wiring distance.

12. The light source driving board according to claim 9, characterized in that: The tip of the first apex window and the tip of the second apex window are acute angles.

13. The light source driving board according to claim 12, characterized in that: The angle between the tip of the first pointed window and the tip of the second pointed window is not less than 30 degrees and not more than 60 degrees.

14. The light source driving board according to claim 9, characterized in that: The shapes of the first tip window and the second tip window are specifically triangular or teardrop-shaped.

15. The light source driving board according to claim 14, characterized in that: When the first tip window and the second tip window are triangles, the triangles are isosceles triangles, and the length of the base of the triangle is greater than 0.2 mm.

16. The light source driving board according to claim 9, characterized in that: The first tip window and the second tip window are configured as a tip window group; and a plurality of the tip window groups are arranged side by side on the substrate.

17. The light source driving board according to any one of claims 1 to 16, characterized in that: The circuit module has a plurality of current branches; On the substrate, the grounding ends of the plurality of current branches are electrically connected to each other through copper coating on the substrate, and the plurality of grounding ends are arranged close to each other on the substrate.

18. The light source driving board according to any one of claims 1 to 16, characterized in that: The circuit module has at least one heating device, and on the substrate, the copper-clad area connected to the overcurrent pin in the heating device is the overcurrent copper-clad area; Among them, the width of the overcurrent copper clad area is greater than or equal to twice the preset current-carrying width; the preset current-carrying width is a rated width that meets the current requirement flowing through the overcurrent pin.

19. The light source driving board according to claim 18, characterized in that: The substrate has a first side and a second side that are arranged opposite to each other, the overcurrent copper clad area is arranged on one of the first side and the second side of the substrate, and a window portion is arranged on the other side at a position corresponding to the overcurrent copper clad area; The window portion is provided with at least one through hole penetrating the first side and the second side.

20. The light source driving board according to claim 19, characterized in that: The via hole is filled with metal heat dissipation material.

21. A light source module, characterized in that: The light source module comprises a lighting device and a light source driving board as described in any one of claims 1 to 20, and the light source driving board is drivingly connected to the lighting device.

22. An electronic device, characterized in that: The electronic device comprises: The light source driving board according to any one of claims 1 to 20, or The light source module as claimed in claim 21.

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