High-compatibility multifunctional lighting device

Abstract

A high-compatibility multifunctional lighting device comprises a first rectifier module, a signal isolation module, an electromagnetic compatibility module, a post-stage constant current module, a second rectifier module and a load. The first rectification module is connected with a first live line input end and a first neutral line input end of an external power supply. The signal isolation module is connected with the first rectification module. The electromagnetic compatibility module is connected with the signal isolation module. And the post-stage constant current module is connected with the electromagnetic compatibility module. The second rectification module is connected with a second live wire input end and a second neutral line input end of the external power supply, is connected with the post-stage constant current module, and is connected in parallel with the first rectification module. And the load is connected with the post-stage constant current module.

Description

Technical Field

[0001] The invention relates to a lighting device, in particular to a high-compatibility multifunctional lighting device. Background Art

[0002] Fluorescent tubes are a common lighting device. However, some applications require lighting devices with dimmable functions and emergency functions, which require complex ballast circuit design. Therefore, light-emitting diode lamps that can replace fluorescent tubes have also been developed to solve the above problems.

[0003] However, the existing LED lamps still have many disadvantages that need to be further improved. For example, the existing LED lamps lack a proper dimming circuit design, and thus still cannot achieve a good dimming function.

[0004] In addition, existing LED lamps also lack an appropriate anti-electric shock mechanism, so their safety still needs to be improved.

[0005] Therefore, the existing LED lamps still cannot meet the requirements of practical applications. Summary of the invention

[0006] According to one embodiment of the present invention, a highly compatible multifunctional lighting device is provided, which includes a first rectifier module, a signal isolation module, an electromagnetic compatibility module, a post-stage constant current module, a second rectifier module and a load. The first rectifier module is connected to a first live wire input terminal and a first neutral wire input terminal of an external power supply. The signal isolation module is connected to the first rectifier module. The electromagnetic compatibility module is connected to the signal isolation module. The post-stage constant current module is connected to the electromagnetic compatibility module. The second rectifier module is connected to a second live wire input terminal and a second neutral wire input terminal of the external power supply, and is connected to the post-stage constant current module, and is connected in parallel with the first rectifier module. The load is connected to the post-stage constant current module.

[0007] In one embodiment, the signal isolation circuit is a diode.

[0008] In one embodiment, the lighting device further comprises a leakage detection module, which is disposed between the electromagnetic compatibility module and the subsequent constant current module and is connected to the electromagnetic compatibility module and the subsequent constant current module.

[0009] In one embodiment, the lighting device further comprises a surge absorption module, and the surge absorption module is connected to the leakage detection module.

[0010] In one embodiment, the surge absorption module is a transient voltage suppression diode.

[0011] In one embodiment, the leakage detection module further includes a first dummy load. The first dummy load is disposed between the signal isolation module and the first rectifier module, and is connected to the signal isolation module and the first rectifier module.

[0012] In one embodiment, the subsequent constant current module further includes a second dummy load, which is disposed between the subsequent constant current module and the load and connected to the subsequent constant current module and the load.

[0013] In one embodiment, the lighting device further comprises a series resonant filter module, which is disposed between the second dummy load, the subsequent constant current module, and a common point between the first rectifier module and the second rectifier module, and is connected to the second dummy load, the subsequent constant current module, the first rectifier module, and the second rectifier module.

[0014] In one embodiment, the first rectifier module includes a first rectifier, a first fuse and a second fuse. The first rectifier is connected to a first live line input terminal and a first neutral line input terminal through the first fuse and the second fuse respectively.

[0015] In one embodiment, the second rectifier module includes a second rectifier and a third fuse. The second rectifier is connected to the second live wire input terminal through the third fuse.

[0016] As described above, the highly compatible multifunctional lighting device according to the embodiments of the present invention may have one or more of the following advantages:

[0017] (1) In one embodiment of the present invention, the lighting device includes a first rectifier module, a signal isolation module, an electromagnetic compatibility module, a subsequent constant current module, a second rectifier module and a load. The first rectifier module is connected to the first live wire input terminal and the first neutral wire input terminal of the external power supply. The signal isolation module is connected to the first rectifier module. The electromagnetic compatibility module is connected to the signal isolation module. The subsequent constant current module is connected to the electromagnetic compatibility module. The second rectifier module is connected to the second live wire input terminal and the second neutral wire input terminal of the external power supply, and is connected to the subsequent constant current module, and is connected in parallel with the first rectifier module. The load is connected to the subsequent constant current module. As can be seen from the above, the circuit structure of the lighting device integrates the signal isolation module, which can effectively prevent the interference signal generated by the electromagnetic compatibility module, so that the signal judgment unit of the subsequent constant current module can effectively detect the state of the input signal. Therefore, the performance of the lighting device can be greatly optimized.

[0018] (2) In one embodiment of the present invention, the lighting device further includes a leakage detection module. The leakage detection module is disposed between the electromagnetic compatibility module and the subsequent constant current module, and is connected to the electromagnetic compatibility module and the subsequent constant current module. The leakage detection module can trigger an anti-electric shock mechanism. By integrating the circuit design of the leakage detection module and the signal isolation module, the lighting device can effectively realize the leakage detection function and the signal isolation function, so the performance of the lighting device can be further optimized to meet the needs of practical applications.

[0019] (3) In one embodiment of the present invention, the control unit of the rear constant current module of the lighting device has a special dimming control mechanism, which can effectively be compatible with both front-cut dimming and rear-cut dimming, and does not require changing the original dimmer. Therefore, the lighting device can meet the needs of different applications.

[0020] (4) In one embodiment of the present invention, the control unit of the subsequent constant current module of the lighting device has a special memory function, which can store the current working mode as the target working mode when detecting that the number of switching times within a preset time is greater than a preset value. Then, the control unit can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device.

[0021] (5) In one embodiment of the present invention, the lighting device has an electromagnetic compatibility module, which can prevent the operating frequency from exceeding a preset upper limit value, so that the lighting device can meet safety standards. Therefore, the lighting device can be more widely used and more flexible in use.

[0022] (6) In one embodiment of the present invention, the first rectifier module of the lighting device includes a first rectifier, a first fuse and a second fuse. The first rectifier is connected to the first live wire input terminal and the first neutral wire input terminal through the first fuse and the second fuse respectively. The second rectifier module of the lighting device includes a second rectifier and a third fuse. The second rectifier is connected to the second live wire input terminal through the third fuse. The above-mentioned multiple fuses can provide an effective overcurrent protection function, thereby greatly improving the safety of the lighting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 4 is a block diagram of the circuit structure of the high-compatibility multifunctional lighting device according to the first embodiment of the present invention.

[0024] Figure 2 FIG. 4 is a block diagram of the circuit structure of a high-compatibility multifunctional lighting device according to a second embodiment of the present invention.

[0025] Figure 3 FIG. 4 is a circuit diagram of a high-compatibility multifunctional lighting device according to a third embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-lighting device; 11-first rectifier module; 12-signal isolation module; 13-electromagnetic compatibility module; 14-post-stage constant current module; 141-signal judgment unit; 142-control unit; 143-constant current unit; 15-second rectifier module; 16-load; 17-leakage detection module; 18-surge absorption module; 19-series resonant filter module; 20-first dummy load; 21-second dummy load; BD1-first rectifier; BD2-second rectifier; F1-first fuse; F2-second fuse; F3-third fuse; D1-first diode; D2-second diode; L1-first inductor; L2-second inductor; L3- The third inductor; R1-the first resistor; R2-the second resistor; R3-the third resistor; R4-the fourth resistor; R5-the fifth resistor; R6-the sixth resistor; R7-the seventh resistor; R8-the eighth resistor; R9-the ninth resistor; R10-the tenth resistor; R11-the eleventh resistor; C1-the first capacitor; C2-the second capacitor; C3-the third capacitor; C4-the fourth capacitor; EC1-electrolytic capacitor; U1-controller; TVS-transient voltage suppression diode; LD-light emitting diode; Lt1-the first live wire input terminal; Nt1-the first neutral wire input terminal; Lt2-the second live wire input terminal; Nt2-the second neutral wire input terminal; GND-grounding point.

[0028] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Moreover, according to the contents, claims and drawings disclosed in this specification, any person skilled in the relevant art can easily understand the purposes and advantages of the present creation. DETAILED DESCRIPTION

[0029] The following will refer to the relevant drawings to illustrate the embodiments of the highly compatible multifunctional lighting device according to the present invention. For the sake of clarity and convenience of the drawings, the components in the drawings may be exaggerated or reduced in size and proportion. In the following description and / or claims, when it is mentioned that a component is "connected" or "coupled" to another component, it may be directly connected or coupled to the other component or there may be an intervening component; and when it is mentioned that a component is "directly connected" or "directly coupled" to another component, there is no intervening component, and other words used to describe the relationship between components or layers should be interpreted in the same way. For ease of understanding, the same components in the following embodiments are illustrated with the same symbols.

[0030] See also Figure 1 , which is a block diagram of the circuit structure of the high-compatibility multifunctional lighting device of the first embodiment of the present invention. As shown in the figure, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15 and a load 16.

[0031] The first rectifier module 11 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 of the external power source. The external power source may be a lamp holder connected to the mains. In one embodiment, the first rectifier module 11 may be a rectifier bridge. In another embodiment, the first rectifier module 11 may also be various full-wave rectifiers or half-wave rectifiers.

[0032] The signal isolation module 12 is connected to the first rectifier module 11. In one embodiment, the signal isolation module 12 may be a diode. In another embodiment, the signal isolation module 12 may also be various components with a signal isolation function.

[0033] The electromagnetic compatibility module 13 is connected to the signal isolation module 12. In one embodiment, the electromagnetic compatibility module 13 may be a type II filter. In another embodiment, the electromagnetic compatibility module 13 may also be other circuits with electromagnetic compatibility functions. The electromagnetic compatibility module 12 can prevent the operating frequency from exceeding a preset upper limit value, so that the lighting device 1 can meet safety standards.

[0034] The rear constant current module 14 is connected to the electromagnetic compatibility module 13. The rear constant current module 14 includes a signal judgment unit 141, a control unit 142 and a constant current unit 143. The signal judgment unit 141 is connected to the electromagnetic compatibility module 13, the control unit 142 and the constant current unit 143. The control unit 142 is connected to the signal judgment unit 141 and the constant current unit 143. In one embodiment, the signal judgment unit 141 may be a circuit including a plurality of resistors. The constant current unit 143 may provide a constant current function. In one embodiment, the control unit 142 may be a microcontroller (MCU). In another embodiment, the control unit 142 may be a central processing unit (CPU), an application-specific integrated circuit chip (ASIC), a field programmable gate array (FPGA) or other similar components. The control unit 142 has a special dimming control mechanism, which can effectively be compatible with front-cut dimming and rear-cut dimming, and does not require the original dimmer to be changed. Therefore, the lighting device 1 can meet the needs of different applications. In addition, the control unit 142 has a special memory function, which can store the current working mode as the target working mode when detecting that the number of switching times within a preset time is greater than a preset value. Then, the control unit 142 can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device 1.

[0035] The second rectifier module 15 is connected to the second live line input terminal Lt2 and the second neutral line input terminal Nt2 of the external power supply, and is connected to the subsequent constant current module 14 (constant current unit 143), and is connected in parallel with the first rectifier module 11. In one embodiment, the second rectifier module 15 can be a rectifier bridge. In another embodiment, the second rectifier module 15 can also be various full-wave rectifiers or half-wave rectifiers.

[0036] The load 16 is connected to the subsequent constant current module 14 (constant current unit 143). In one embodiment, the load 16 may be a plurality of light emitting diodes LD connected in series. In one embodiment, the load 16 may also be a plurality of light emitting diodes LD based on a serial circuit and / or a parallel circuit.

[0037] As can be seen from the above, in this embodiment, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15 and a load 16. The first rectifier module 11 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 of the external power supply. The signal isolation module 12 is connected to the first rectifier module 11. The electromagnetic compatibility module 13 is connected to the signal isolation module 12. The post-stage constant current module 14 is connected to the electromagnetic compatibility module 13. The second rectifier module 16 is connected to the second live line input terminal Lt2 and the second neutral line input terminal Nt2 of the external power supply, and is connected to the post-stage constant current module 14, and is connected in parallel with the first rectifier module 11. The load 16 is connected to the post-stage constant current module 14. The circuit structure of the lighting device 1 integrates the signal isolation module 12, which can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal judgment unit 141 of the post-stage constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized.

[0038] Of course, this embodiment is only used for illustration rather than to limit the scope of the present invention, and equivalent modifications or changes made to the high-compatibility multifunctional lighting device 1 according to this embodiment should still be included in the patent scope of the present invention.

[0039] See also Figure 2 , which is a block diagram of the circuit structure of a highly compatible multifunctional lighting device according to the second embodiment of the present invention. As shown in the figure, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15 and a load 16. The post-stage constant current module 14 includes a signal determination unit 141, a control unit 142 and a constant current unit 143.

[0040] The above components are similar to the above embodiments, so they are not described in detail here. Different from the above embodiments, the lighting device 1 further includes a leakage detection module 17 , a surge absorption module 18 , a series resonant filter module 19 , a first dummy load 20 and a second dummy load 21 .

[0041] The leakage detection module 17 is disposed between the electromagnetic compatibility module 13 and the subsequent constant current module 14, and is connected to the electromagnetic compatibility module 13 and the subsequent constant current module 14 (signal determination unit 141 and control unit 142). In one embodiment, the leakage detection module 17 may be a circuit including a plurality of resistors.

[0042] The surge absorption module 18 is connected to the leakage detection module 17. In one embodiment, the surge absorption module 18 can be a transient voltage suppression diode TVS (Transient Voltage Suppressor). In another embodiment, the surge absorption module 18 can be various circuits with surge absorption function.

[0043] The first dummy load 20 is disposed between the signal isolation module 12 and the first rectifier module 11, and is connected to the signal isolation module 12 and the first rectifier module 11. In one embodiment, the first dummy load 20 may be a resistor. In one embodiment, the first dummy load 20 may also be a serial circuit including a plurality of resistors. The first dummy load 20 is a dummy load of the leakage detection module 17, which adopts a separate design (not directly connected to the leakage detection module 17), which can more effectively improve the performance of the leakage detection module 17.

[0044] The second dummy load 21 is disposed between the subsequent constant current module 14 and the load 16, and is connected to the subsequent constant current module 14 (constant current unit 143) and the load 16. In one embodiment, the second dummy load 21 may be a resistor. In one embodiment, the second dummy load 21 may also be a serial circuit including a plurality of resistors.

[0045] The series resonant filter module 19 is disposed at the common point (i.e., the second dummy load 21, the subsequent constant current module 14, and the first rectifier module 11 and the second rectifier module 15) Figure 3 The first rectifier module 11 is connected to the ground point GND of the first rectifier module 15, and is connected to the second dummy load 21, the post-stage constant current module 14 (constant current unit 143), the first rectifier module 11, and the second rectifier module 15. In one embodiment, the series resonant filter module 19 may be a circuit including an inductor. In one embodiment, the series resonant filter module 19 may be a circuit including a capacitor or a circuit including both an inductor and a capacitor.

[0046] Similarly, in this embodiment, the circuit structure of the lighting device 1 integrates the signal isolation module 12, which can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal determination unit 141 of the subsequent constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized.

[0047] In addition, in this embodiment, the lighting device 1 further includes a leakage detection module 17. The leakage detection module 17 can trigger an anti-electric shock mechanism. By integrating the circuit design of the leakage detection module 17 and the signal isolation module 12, the lighting device 1 can effectively realize the leakage detection function and the signal isolation function, so the performance of the lighting device 1 can be further optimized to meet the needs of practical applications.

[0048] Of course, this embodiment is only used for illustration rather than to limit the scope of the present invention, and equivalent modifications or changes made to the high-compatibility multifunctional lighting device 1 according to this embodiment should still be included in the patent scope of the present invention.

[0049] It is worth mentioning that the existing light-emitting diode lamp tubes still have many shortcomings that need to be further improved. For example, the existing light-emitting diode lamp tubes lack appropriate dimming circuit design, so they still cannot achieve a good dimming function. In addition, the existing light-emitting diode lamp tubes also lack appropriate anti-electric shock mechanisms, so their safety still needs to be improved. Therefore, the existing light-emitting diode lamp tubes still cannot meet the needs of practical applications. In contrast, according to an embodiment of the present invention, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15 and a load 16. The first rectifier module 11 is connected to the first live wire input terminal Lt1 and the first neutral wire input terminal Nt1 of the external power supply. The signal isolation module 12 is connected to the first rectifier module 11. The electromagnetic compatibility module 13 is connected to the signal isolation module 12. The post-stage constant current module 14 is connected to the electromagnetic compatibility module 13. The second rectifier module 15 is connected to the second live line input terminal Lt2 and the second neutral line input terminal Nt2 of the external power source, and is connected to the subsequent constant current module 14, and is connected in parallel with the first rectifier module 11. The load 16 is connected to the subsequent constant current module 14. As can be seen from the above, the circuit structure of the lighting device 1 integrates the signal isolation module 12, which can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal judgment unit 141 of the subsequent constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized.

[0050] Furthermore, according to an embodiment of the present invention, the lighting device 1 further includes a leakage detection module 17. The leakage detection module 17 is disposed between the electromagnetic compatibility module 13 and the subsequent constant current module 14, and is connected to the electromagnetic compatibility module 13 and the subsequent constant current module 14. The leakage detection module 17 can trigger an anti-electric shock mechanism. By integrating the circuit design of the leakage detection module 17 and the signal isolation module 12, the lighting device 1 can effectively realize the leakage detection function and the signal isolation function, so the performance of the lighting device 1 can be further optimized to meet the needs of practical applications.

[0051] In addition, according to the embodiment of the present invention, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special dimming control mechanism, which can effectively be compatible with the front-cut dimming and the rear-cut dimming, and does not need to change the original dimmer. Therefore, the lighting device 1 can meet the needs of different applications.

[0052] In addition, according to an embodiment of the present invention, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special memory function, which can store the current working mode as the target working mode when detecting that the number of switching times within a preset time is greater than a preset value. Then, the control unit 142 can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device 1.

[0053] Furthermore, according to the embodiment of the present invention, the lighting device 1 has an electromagnetic compatibility module 13, which can prevent the operating frequency from exceeding the preset upper limit value, so that the lighting device 1 can meet the safety standards. Therefore, the lighting device 1 can be more widely used and more flexible in use. From the above, it can be seen that the high-compatibility multifunctional lighting device according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0054] See also Figure 3 , which is a circuit diagram of a highly compatible multifunctional lighting device according to the third embodiment of the present invention. This embodiment illustrates one of the circuit structures of the lighting device 1. As shown in the figure, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15, a load 16, a leakage detection module 17, a surge absorption module 18, a series resonant filter module 19, a first dummy load 20 and a second dummy load 21 (GND represents a grounding point). The connection relationship between the above modules is the same as Figure 2 The same, so I won't elaborate on it here.

[0055] The first rectifier module 11 includes a first rectifier BD1, a first fuse F1 and a second fuse F2. The first rectifier BD1 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 through the first fuse F1 and the second fuse F2 respectively.

[0056] The signal isolation module 12 includes a first diode D1 .

[0057] The electromagnetic compatibility module 13 includes a first inductor L1 , a third resistor R3 , a first capacitor C1 , a second capacitor C2 , and a third capacitor C3 .

[0058] The post-stage constant current module 14 includes a signal determination unit 141, a control unit 142 and a constant current unit 143. The signal determination unit 141 includes a fourth resistor R4 and a fifth resistor R5. The control unit 142 includes a controller U1. The constant current unit 143 includes an electrolytic capacitor EC1, a second diode D2, a second inductor L2, a sixth resistor R6 and a seventh resistor R7.

[0059] The second rectifier module 15 includes a second rectifier BD2 and a third fuse F3. The second rectifier BD2 is connected to the second live line input terminal Lt2 of the external power source through the third fuse F3, and is directly connected to the second neutral line input terminal Nt2 of the external power source.

[0060] The load 16 includes a plurality of light emitting diodes LD connected in series.

[0061] The leakage detection module 17 includes an eighth resistor R8 , a ninth resistor R9 and a tenth resistor R10 .

[0062] The surge absorption module 18 includes a transient voltage suppressor diode TVS.

[0063] The series resonant filter module 19 includes a fourth capacitor C4 and a third inductor L3.

[0064] The first dummy load 20 includes a first resistor R1 and a second resistor R2 .

[0065] The second dummy load 21 includes an eleventh resistor R11 .

[0066] The first rectifier module 11 includes a first rectifier BD1, a first fuse F1 and a second fuse F2. The first rectifier BD1 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 through the first fuse F1 and the second fuse F2 respectively. The second rectifier module 15 includes a second rectifier BD2 and a third fuse F3. The second rectifier BD2 is connected to the second live line input terminal Lt2 of the external power supply through the third fuse F3, and is directly connected to the second neutral line input terminal Nt2 of the external power supply. The second rectifier module 15 is also connected to the subsequent constant current module 14 (constant current unit 143) and is connected in parallel with the first rectifier module 11. The above three fuses ensure that at least one fuse is connected in series to the circuit to ensure the safety of the circuit. The above multiple fuses can provide an effective overcurrent protection function, which greatly improves the safety of the lighting device 1.

[0067] The AC input current is rectified by the first rectifier BD1 and the second rectifier BD2 to form a DC current, and this DC current enters the controller U1 after passing through the eighth resistor R8 and the ninth resistor R9. The controller U1 performs a zero-crossing check to determine whether the AC input current is a signal of the mains. If not, the controller turns off the subsequent constant current module 14. At the same time, the controller U1 monitors the voltage of the tenth resistor R10. For example, the ratio of the tenth resistor R10 to the human body resistance is 1:10 (the above ratio can be adjusted according to actual needs), so when the voltage of the tenth resistor R10 increases by more than 10 times, the controller U1 determines that there may be a risk of leakage; therefore, the controller U1 turns off the subsequent constant current module 14 to prevent electric shock.

[0068] The signal isolation module 12 converts the rectified DC current into a unidirectional current. Various currents or voltages generated by the subsequent circuit cannot flow back through the signal isolation module 12. The signal isolation module 12 can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal judgment unit 141 of the subsequent constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized. Therefore, the controller U1 can accurately perform the leakage detection function through the leakage detection module 17 and perform various necessary operations.

[0069] The electromagnetic compatibility module 13 can prevent the operating frequency from exceeding a preset upper limit value, so that the lighting device 1 can meet safety standards. Therefore, the lighting device 1 can be more widely used and more flexible in use.

[0070] The controller U1 cannot detect a complete half-sine wave voltage from the eighth resistor R8 and the ninth resistor R1, and the controller U1 compares the voltage V4 detected by the fourth resistor R4 with the voltage V5 detected by the fifth resistor R5. If the voltage V5 is greater than the voltage V4, the controller U1 determines that the leading phase dimmer is connected, so it switches to the leading phase working mode. If the voltage V5 is less than the voltage V4, the controller U1 determines that the trailing phase dimmer is connected, so it switches to the trailing phase working mode. If the voltage V5 is equal to the voltage V4, the controller U1 determines that the DC voltage source is connected, so it switches to the DC working mode.

[0071] The controller U1 can also perform a memory function, which can store the current working mode as the target working mode when it detects that the number of switching times within a preset time (such as 8 seconds, 10 seconds, 15 seconds...) is greater than a preset value (5 times, 6 times, 7 times...). Then, the controller U1 can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device 1.

[0072] As can be seen from the above, in this embodiment, the circuit structure of the lighting device 1 integrates the signal isolation module 12, which can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal determination unit 141 of the subsequent constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized.

[0073] In addition, in this embodiment, the lighting device 1 includes a leakage detection module 17. The leakage detection module 17 can trigger an anti-electric shock mechanism. By integrating the circuit design of the leakage detection module 17 and the signal isolation module 12, the lighting device 1 can effectively realize the leakage detection function and the signal isolation function, so the performance of the lighting device 1 can be further optimized to meet the needs of practical applications.

[0074] In addition, in this embodiment, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special dimming control mechanism, which can effectively be compatible with front-end dimming and rear-end dimming without changing the original dimmer. Therefore, the lighting device 1 can meet the needs of different applications.

[0075] Furthermore, in this embodiment, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special memory function, which can store the current working mode as the target working mode when detecting that the number of switching times within a preset time is greater than a preset value. Then, the control unit 142 can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device 1.

[0076] Of course, this embodiment is only used for illustration rather than to limit the scope of the present invention, and equivalent modifications or changes made to the high-compatibility multifunctional lighting device 1 according to this embodiment should still be included in the patent scope of the present invention.

[0077] In summary, according to an embodiment of the present invention, the lighting device 1 includes a first rectifier module 11, a signal isolation module 12, an electromagnetic compatibility module 13, a post-stage constant current module 14, a second rectifier module 15 and a load 16. The first rectifier module 11 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 of the external power supply. The signal isolation module 12 is connected to the first rectifier module 11. The electromagnetic compatibility module 13 is connected to the signal isolation module 12. The post-stage constant current module 14 is connected to the electromagnetic compatibility module 13. The second rectifier module 15 is connected to the second live line input terminal Lt2 and the second neutral line input terminal Nt2 of the external power supply, and is connected to the post-stage constant current module 14, and is connected in parallel with the first rectifier module 11. The load 16 is connected to the post-stage constant current module 14. As can be seen from the above, the circuit structure of the lighting device 1 integrates the signal isolation module 12, which can effectively prevent the interference signal generated by the electromagnetic compatibility module 13, so that the signal judgment unit 141 of the post-stage constant current module 14 can effectively detect the state of the input signal. Therefore, the performance of the lighting device 1 can be greatly optimized.

[0078] According to an embodiment of the present invention, the lighting device 1 further includes a leakage detection module 17. The leakage detection module 17 is disposed between the electromagnetic compatibility module 13 and the subsequent constant current module 14, and is connected to the electromagnetic compatibility module 13 and the subsequent constant current module 14. The leakage detection module 17 can trigger an anti-electric shock mechanism. By integrating the circuit design of the leakage detection module 17 and the signal isolation module 12, the lighting device 1 can effectively realize the leakage detection function and the signal isolation function, so the performance of the lighting device 1 can be further optimized to meet the needs of practical applications.

[0079] Furthermore, according to the embodiment of the present invention, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special dimming control mechanism, which can effectively be compatible with the front-cut dimming and the rear-cut dimming, and does not need to change the original dimmer. Therefore, the lighting device 1 can meet the needs of different applications.

[0080] In addition, according to an embodiment of the present invention, the control unit 142 of the rear constant current module 14 of the lighting device 1 has a special memory function, which can store the current working mode as the target working mode when detecting that the number of switching times within a preset time is greater than a preset value. Then, the control unit 142 can directly operate in the target working mode when entering the startup state next time. The above-mentioned memory function can greatly improve the working efficiency of the lighting device 1.

[0081] In addition, according to the embodiment of the present invention, the lighting device 1 has an electromagnetic compatibility module 13, which can prevent the operating frequency from exceeding a preset upper limit value, so that the lighting device 1 can meet safety standards. Therefore, the lighting device 1 can be more widely used and more flexible in use.

[0082] Furthermore, according to an embodiment of the present invention, the first rectifier module 11 of the lighting device 1 includes a first rectifier BD1, a first fuse F1 and a second fuse F2. The first rectifier BD1 is connected to the first live line input terminal Lt1 and the first neutral line input terminal Nt1 through the first fuse F1 and the second fuse F2, respectively. The second rectifier module 15 of the lighting device 1 includes a second rectifier BD2 and a third fuse F3. The second rectifier BD2 is connected to the second live line input terminal Nt2 through the third fuse F3. The above-mentioned multiple fuses can provide an effective overcurrent protection function, which greatly improves the safety of the lighting device 1.

[0083] It should be noted that, although the above embodiments have been described in this article, the scope of patent protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the patent of the present invention.

Claims

1. A highly compatible multifunctional lighting device, characterized in that: include: A first rectifier module is connected to a first live line input terminal and a first neutral line input terminal of an external power source; A signal isolation module connected to the first rectifier module; An electromagnetic compatibility module, connected to the signal isolation module; A rear constant current module connected to the electromagnetic compatibility module; a second rectifier module connected to the second live line input terminal and the second neutral line input terminal of the external power supply, connected to the subsequent constant current module, and connected in parallel with the first rectifier module; and A load is connected to the subsequent constant current module.

2. The highly compatible multifunctional lighting device according to claim 1, characterized in that: The signal isolation circuit is a diode.

3. The highly compatible multifunctional lighting device according to claim 1, characterized in that: It also includes a leakage detection module, which is arranged between the electromagnetic compatibility module and the subsequent constant current module and connected to the electromagnetic compatibility module and the subsequent constant current module.

4. The highly compatible multifunctional lighting device according to claim 3, characterized in that: It also includes a surge absorption module, which is connected to the leakage detection module.

5. The highly compatible multifunctional lighting device according to claim 4, characterized in that: The surge absorption module is a transient voltage suppression diode.

6. The highly compatible multifunctional lighting device according to claim 3, characterized in that: The leakage detection module further includes a first dummy load, which is disposed between the signal isolation module and the first rectifier module and connected to the signal isolation module and the first rectifier module.

7. The highly compatible multifunctional lighting device according to claim 1, characterized in that: The latter constant current module further includes a second dummy load, which is disposed between the latter constant current module and the load and connected to the latter constant current module and the load.

8. The highly compatible multifunctional lighting device according to claim 7, characterized in that: It also includes a series resonant filter module, which is arranged between the second dummy load, the subsequent constant current module and the common point of the first rectifier module and the second rectifier module, and is connected to the second dummy load, the subsequent constant current module, the first rectifier module and the second rectifier module.

9. The highly compatible multifunctional lighting device according to claim 1, characterized in that: The first rectifier module includes a first rectifier, a first fuse and a second fuse. The first rectifier is connected to the first live line input terminal and the first neutral line input terminal through the first fuse and the second fuse respectively.

10. The highly compatible multifunctional lighting device according to claim 1, characterized in that: The second rectifier module includes a second rectifier and a third fuse, and the second rectifier is connected to the second live wire input terminal through the third fuse.

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