High-voltage lamp strip

Abstract

The utility model provides a high-voltage lamp strip. The high-voltage lamp strip comprises a power-in protection module and at least one lamp group, each lamp group comprises a lamp string, an anti-stroboscopic circuit and a TVS (Transient Voltage Suppressor) tube; the positive electrode end of the lamp string is connected to the output end of the power-in protection module; the input end of the anti-stroboscopic circuit is connected to the negative electrode end of the lamp string, and the output end of the anti-stroboscopic circuit is used for being connected with a grounding end; the negative electrode of the TVS tube is connected to the input end of the anti-stroboscopic circuit, and the positive electrode of the TVS tube is connected to the output end of the anti-stroboscopic circuit. The high-voltage lamp strip is used for solving the problem of insufficient electrical safety in a circuit in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting devices, in particular to a high-voltage light strip. Background Art

[0002] With the rapid development of LED lighting technology, high-voltage light strips, as efficient and energy-saving linear lighting devices, have been widely used in architectural decoration, commercial displays, and home lighting. However, traditional high-voltage light strips still have the following technical defects during long-term use: slow response speed of protection circuits, and transient overvoltages that can easily damage electronic circuits. Utility Model Content

[0003] In view of this, the present invention provides a high-voltage light strip, which is used to solve the problem of insufficient electrical safety in circuits in the prior art.

[0004] To achieve one, part, or all of the above objectives or other objectives, the present invention provides a high-voltage light strip, comprising an inrush protection module and at least one light group;

[0005] Each of the lamp groups includes: a lamp string, a lightning protection circuit, and a TVS tube;

[0006] The positive terminal of the light string is connected to the output terminal of the power-in protection module;

[0007] The input end of the anti-flash circuit is connected to the negative terminal of the light string, and the output end of the anti-flash circuit is used to connect to the ground terminal;

[0008] The cathode of the TVS tube is connected to the input end of the anti-flash circuit, and the anode of the TVS tube is connected to the output end of the anti-flash circuit.

[0009] Furthermore, the anti-flash circuit includes: an anti-flash chip and an adjustment resistor;

[0010] The input pin of the anti-stroboscopic chip is connected to the negative terminal of the light string and the negative electrode of the TVS tube, and the output pin of the anti-stroboscopic chip is connected to the positive electrode of the TVS tube;

[0011] One end of the regulating resistor is connected to the input pin of the anti-stroboscopic chip, and the other end of the regulating resistor is connected to the control pin of the anti-stroboscopic chip.

[0012] Furthermore, the anti-stroboscopic circuit includes: an adjustment capacitor; one end of the adjustment capacitor is connected to the control pin of the anti-stroboscopic chip, and the other end of the adjustment capacitor is connected to the output pin of the anti-stroboscopic chip.

[0013] Furthermore, there is one lamp group; the high-voltage lamp strip also includes a harmonic processing circuit, the input end of the harmonic processing circuit is connected to the output end of the anti-flash circuit, and the output end of the harmonic processing circuit is used to connect to the ground end.

[0014] Furthermore, the number of the lamp groups is more than two; the high-voltage lamp strip further includes a harmonic processing circuit, and the harmonic processing circuit includes a harmonic processing chip;

[0015] The output ends of the anti-flash circuits of the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence, and the positive ends of the lamp strings from the second lamp group in the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence; the output pins of the harmonic processing chip are used to connect to the ground end.

[0016] Furthermore, the harmonic processing circuit further includes a voltage protection module; the voltage protection module includes: a first protection diode and a first varistor;

[0017] The cathode of the first protection diode is connected to the output end of the anti-flash circuit of the last lamp group, and the anode of the first protection diode is used to connect to the ground end;

[0018] One end of the first varistor is connected to the output end of the anti-flash circuit of the last lamp group, and the other end of the first varistor is used to connect to the ground end.

[0019] Furthermore, the high-voltage light strip also includes a bus capacitor; one end of the bus capacitor is connected to the output end of the power input protection module and the positive end of the light string of the first light group; the other end of the bus capacitor is used to connect to the ground end.

[0020] Furthermore, each of the lamp groups also includes a second protection diode; the positive pole of the second protection diode of the first lamp group among the multiple lamp groups is connected to the output end of the power input protection module, and the positive poles of the second protection diodes from the second lamp group among the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence; the negative pole of the second protection diode is connected to the positive end of the lamp string corresponding to the lamp group.

[0021] Furthermore, the anti-flash circuit further includes: an electrolytic capacitor and a first protection resistor;

[0022] The positive electrode of the electrolytic capacitor is connected to the negative electrode of the second protection diode and the positive terminal of the light string, and the negative electrode of the electrolytic capacitor is connected to the output pin of the anti-strobe chip;

[0023] One end of the first protection resistor is connected to the positive electrode of the electrolytic capacitor, and the other end of the first protection resistor is connected to the negative electrode of the electrolytic capacitor.

[0024] Furthermore, the harmonic processing circuit further includes: a harmonic processing resistor and a harmonic processing capacitor;

[0025] One end of the harmonic processing resistor is connected to the constant current sampling pin of the harmonic processing chip, and the other end of the harmonic processing resistor is used to connect to the ground end;

[0026] One end of the harmonic processing capacitor is connected to the constant power compensation pin of the harmonic processing chip, and the other end of the harmonic processing capacitor is used to connect to the ground end.

[0027] The implementation of the present invention will have the following beneficial effects:

[0028] The high-voltage light strip proposed in this utility model uses an in-rush protection module to provide preliminary protection for the input current, thereby preliminarily improving the electrical safety of the high-voltage light strip circuit. The anti-flash circuit then eliminates current ripple in the circuit, preventing the light string from flickering, thereby avoiding electrical safety issues caused by flicker. Finally, a TVS diode reduces the chance of multiple lamps within the light string lighting up one after another, preventing partial lighting. The TVS diode also limits the maximum power of the anti-flash circuit, preventing electrical safety issues caused by excessive power in the anti-flash circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] in:

[0031] Figure 1 This is a circuit connection diagram of a high-voltage light strip connection method in one embodiment of the present invention;

[0032] Figure 2 This is a circuit connection diagram of the power-in protection module and bus capacitor of a high-voltage light strip in one embodiment of the present invention;

[0033] Figure 3 This is a circuit connection diagram of the power-in protection module and bus capacitor of a high-voltage light strip in another embodiment of the present invention;

[0034] Figure 4This is a circuit connection diagram of a single lamp group of a high-voltage lamp strip in one embodiment of the present utility model;

[0035] Figure 5 This is a functional block diagram of the internal structure of the anti-stroboscopic chip of the high-voltage light strip in one embodiment of the present invention;

[0036] Figure 6 This is a functional block diagram of the internal structure of the harmonic processing chip of the high-voltage light strip in one embodiment of the present invention.

[0037] Reference numerals:

[0038] 10. Inrush protection module; 11. Inrush protection resistor circuit; 20. Lamp assembly; 21. Light string; 22. Anti-flash circuit; 221. Control module; 222. DRAIN pin; 223. VCC pin; 224. GND pin; 23. TVS diode; 30. Harmonic processing circuit; 31. Voltage protection module; 321. Drive logic module; 322. Power supply module; 323. Power compensation module; 324. Detection module; 325. Parameter calibration module; 40. Power supply;

[0039] L, live wire; N, neutral wire; RF1, fuse; MOV1, first input varistor; MOV2, second input varistor; DB, rectifier circuit; D11, first diode; D12, second diode; D13, third diode; D14, fourth diode; U1, anti-strobe chip; MOS1, first transistor; R21, first chip internal resistor; R22, second chip internal resistor; R23, third chip internal resistor; R1, adjustment resistor; C1, adjustment capacitor; CE1, electrolytic capacitor; R2, first protection resistor; D21, second protection diode; U2, harmonic processing chip; D31, first protection diode; MOV3, first varistor; RS, harmonic processing resistor; C2, harmonic processing capacitor; MOS2, second transistor; MOS3, third transistor; MOS4, fourth transistor; C3, bus capacitor. DETAILED DESCRIPTION

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this invention; the terms "including" and "having" and any variations thereof in the specification and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this invention or the accompanying drawings are used to distinguish different objects rather than to describe a specific order. The cold water mentioned in the specification and claims of this invention includes water at room temperature.

[0041] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0043] Reference Figures 1 to 6 The first embodiment of the present application provides a high-voltage light strip, which includes: an inrush protection module 10, at least one light group 20;

[0044] Each of the lamp groups 20 includes: a lamp string 21, a flash protection circuit 22, and a TVS tube 23;

[0045] The positive terminal of the light string 21 is connected to the output terminal of the power inlet protection module 10;

[0046] The input end of the anti-flash circuit 22 is connected to the negative terminal of the light string 21, and the output end of the anti-flash circuit 22 is used to connect to the ground terminal;

[0047] The cathode of the TVS tube 23 is connected to the input end of the anti-flash circuit 22 , and the anode of the TVS tube 23 is connected to the output end of the anti-flash circuit 22 .

[0048] In this embodiment, the input current is initially protected by the power-in protection module 10, monitoring the current and voltage in the circuit to prevent overcurrent and overvoltage conditions, thereby preliminarily improving the electrical safety of the high-voltage light strip circuit. The anti-flash circuit 22 then eliminates current ripple in the circuit, preventing flickering in the light string 21 and thus avoiding electrical safety issues caused by flickering. Finally, the TVS diode 23 reduces the occurrence of multiple lamps in the light string 21 lighting up one after another. The TVS diode 23 also limits the maximum power of the anti-flash circuit 22, preventing electrical safety issues caused by excessive power in the anti-flash circuit 22.

[0049] Reference Figures 1 to 3Specifically, the power inlet protection module 10 includes a fuse RF1, a power inlet protection resistor circuit 11 and a rectifier circuit DB; the input end of the fuse RF1 is connected to the output end of the power supply 40, the output end of the fuse RF1 is connected to the input end of the power inlet protection resistor circuit 11, the output end of the power inlet protection resistor circuit 11 is connected to the input end of the rectifier circuit DB, and the output end of the rectifier circuit DB is connected to the positive terminal of the light string 21.

[0050] In this embodiment, when the input current exceeds the rated current of the fuse RF1 or a short circuit occurs in the circuit, the fuse RF1 melts to cut off the circuit, preventing the circuit behind the fuse RF1 from operating in an abnormally high voltage environment, ensuring that the electronic components in the circuit are protected from damage, thereby improving the electrical safety of the circuit.

[0051] Current passing through fuse RF1 enters power-in protection resistor circuit 11, which limits and divides the current, protecting the circuit from abnormal current and voltage. Furthermore, after fuse RF1 blows, power-in protection resistor circuit 11 protects the circuit from the abnormal current and voltage generated by the instantaneous blowing of fuse RF1.

[0052] The current passing through the power-in protection resistor circuit 11 flows into the rectifier circuit DB, which rectifies the incoming AC power to provide a stable power supply for the circuits behind the rectifier circuit DB, further improving the electrical safety of the circuit.

[0053] Reference Figures 1 to 2 In some embodiments, the power-on protection resistor circuit 11 includes a first input voltage-sensitive resistor MOV1; one end of the first input voltage-sensitive resistor MOV1 is respectively connected to the output end of the fuse RF1 and the input end of the rectifier circuit DB, and the other end of the first input voltage-sensitive resistor MOV1 is used to connect to the ground end.

[0054] In another embodiment, the power-on protection resistor circuit 11 includes a second input voltage-sensitive resistor MOV2 ; one end of the second input voltage-sensitive resistor MOV2 is connected to the output end of the fuse RF1 , and the other end of the second input voltage-sensitive resistor MOV2 is connected to the input end of the rectifier circuit DB.

[0055] Reference Figure 3In other embodiments, the power-on protection resistor circuit 11 includes a first input voltage-sensitive resistor MOV1 and a second input voltage-sensitive resistor MOV2; one end of the first input voltage-sensitive resistor MOV1 is respectively connected to the output end of the fuse RF1 and the input end of the rectifier circuit DB, and the other end of the first input voltage-sensitive resistor MOV1 is used to connect to the ground end; one end of the second input voltage-sensitive resistor MOV2 is connected to the output end of the fuse RF1, and the other end of the second input voltage-sensitive resistor MOV2 is connected to the input end of the rectifier circuit DB.

[0056] During operation, if the voltage is too high, the first input voltage-sensitive resistor MOV1 conducts. Excess energy supplied from the live line L of the power supply 40 flows through the first input voltage-sensitive resistor MOV1 to the neutral line N of the power supply 40, discharging the excess energy to ground and protecting the circuitry downstream of the input protection resistor circuit 11 from overvoltage damage. The first input voltage-sensitive resistor MOV1 works in conjunction with the fuse RF1: before the fuse RF1 blows, the first input voltage-sensitive resistor MOV1 conducts, discharging part of the energy supplied from the live line L of the power supply 40 to the neutral line N of the power supply 40. The remaining energy flows to the downstream circuitry through the rectifier circuit DB. After the fuse RF1 blows, the first input voltage-sensitive resistor MOV1 conducts, discharging all of the energy supplied from the live line L of the power supply 40 to the neutral line N of the power supply 40.

[0057] The second input varistor MOV2 limits the outflow current, preventing overcurrent and thus damage to the electronic components within the rectifier circuit DB and those downstream of the rectifier circuit DB. When the second input varistor MOV2 works in conjunction with the fuse RF1: before the fuse RF1 blows, the second input varistor MOV2 acts as a current limiter. After the fuse RF1 blows, the resistance of the second input varistor MOV2 increases, cutting off the current flowing to the rectifier circuit DB and the circuits downstream of the rectifier circuit DB.

[0058] Reference Figures 1 to 3 Specifically, the rectifier circuit DB includes a first diode D11, a second diode D12, a third diode D13 and a fourth diode D14;

[0059] The connection point between the cathode of the first diode D11 and the cathode of the second diode D12 is the first end of the rectifier circuit DB, and the first end of the rectifier circuit DB is connected to the positive end of the light string 21;

[0060] The connection point between the cathode of the fourth diode D14 and the anode of the first diode D11 is the second end of the rectifier circuit DB, and the second end of the rectifier circuit DB is connected to the output end of the fuse RF1 and one end of the first input voltage sensitive resistor MOV1;

[0061] The connection point between the anode of the second diode D12 and the cathode of the third diode D13 is the third end of the rectifier circuit DB, and the third end of the rectifier circuit DB is used to connect to the neutral line N of the power supply 40;

[0062] The connection point between the anode of the third diode D13 and the anode of the fourth diode D14 is the fourth end of the rectifier circuit DB. The fourth end of the rectifier circuit DB is connected to the output end of the anti-flash circuit 22 in the lamp group 20 to form a loop.

[0063] The other end of the first input voltage sensitive resistor MOV1 is connected in parallel between the third end of the rectifier circuit DB and the neutral line N of the power supply 40. The second input voltage sensitive resistor MOV2 is connected in series between the output end of the fuse RF1 and the second end of the rectifier circuit DB.

[0064] Reference Figures 1 to 3 In this embodiment, the first diode D11, the second diode D12, the third diode D13, and the fourth diode D14 are interconnected to form a bridge rectifier stack, which rectifies the AC power supplied from the mains power source. The first end of the rectifier circuit DB is connected to pin 1 of the bridge rectifier stack, the second end of the rectifier circuit DB is connected to pin 2 of the bridge rectifier stack, the third end of the rectifier circuit DB is connected to pin 3 of the bridge rectifier stack, and the fourth end of the rectifier circuit DB is connected to pin 4 of the bridge rectifier stack.

[0065] During operation, the second end of the rectifier circuit DB is connected to the live wire L of the AC power supply to supply current, which then flows into the lamp group 20 through the first end of the rectifier circuit DB, then flows from the negative end of the lamp group 20 to the fourth end of the rectifier circuit DB, and finally flows from the third end of the rectifier circuit DB to the neutral wire N of the AC power supply, thereby forming a current loop.

[0066] Specifically, the power supply 40 is a mains power supply, and the voltage range of the mains power supply is 220V-240V.

[0067] Reference Figure 1 、 Figure 4 and Figure 5 The anti-flash circuit 22 includes: an anti-flash chip U1 and an adjusting resistor R1;

[0068] The input pin of the anti-stroboscopic chip U1 is connected to the negative terminal of the light string 21 and the negative terminal of the TVS tube 23, and the output pin of the anti-stroboscopic chip U1 is connected to the positive terminal of the TVS tube 23;

[0069] One end of the regulating resistor R1 is connected to the input pin of the anti-stroboscopic chip U1 , and the other end of the regulating resistor R1 is connected to the control pin of the anti-stroboscopic chip U1 .

[0070] In this embodiment, the current output from the light string 21 is input to the input pin of the anti-stroboscopic chip U1, and the internal algorithm of the anti-stroboscopic chip U1 is used to achieve the ripple removal function. The regulating resistor R1 is used to sample the ripple voltage and perform current fine-tuning.

[0071] Reference Figure 5 Furthermore, the anti-stroboscopic chip U1 is RM06R20 and packaged in a SOT23-3. The anti-stroboscopic chip U1 includes a control module 221, a first transistor MOS1, a first on-chip resistor R21, a second on-chip resistor R22, a third on-chip resistor R23, a DRAIN pin 222, a VCC pin 223, and a GND pin 224.

[0072] One end of the control module 221 is connected to the gate of the first transistor MOS1, and the other end of the control module 221 is connected to the VCC pin 223; the drain of the first transistor MOS1 is connected to the DRAIN pin 222, and the source of the first transistor MOS1 is connected to the GND pin 224; one end of the first on-chip resistor R21 is connected in parallel between the control module 221 and the gate of the first transistor MOS1, and the other end of the first on-chip resistor R21 is connected in parallel between the drain of the first transistor MOS1 and the DRAIN pin 222; the two ends of the second on-chip resistor R22 are respectively connected to the source of the first transistor MOS1 and the GND pin 224; one end of the third on-chip resistor R23 is connected in parallel between the control module 221 and the gate of the first transistor MOS1, and the other end of the third on-chip resistor R23 is connected in parallel between the second on-chip resistor R22 and the GND pin 224.

[0073] See Figure 4 and Figure 5 , the DRAIN pin 222 corresponds to the input pin of the anti-strobe chip U1, the VCC pin 223 corresponds to the control pin of the anti-strobe chip U1, and the GND pin 224 corresponds to the output pin of the anti-strobe chip U1.

[0074] See Figure 4 and Figure 5 The input pin of the anti-strobe chip U1 is pin 2 of the anti-strobe chip U1, the control pin of the anti-strobe chip U1 is pin 1 of the anti-strobe chip U1, and the output pin of the anti-strobe chip U1 is pin 3 of the anti-strobe chip U1.

[0075] Specifically, the adaptive current ripple suppression range of the anti-stroboscopic chip U1 is 100Hz-120Hz. The anti-stroboscopic chip U1 is compatible with the thyristor dimming function through the control module 221, the first transistor MOS1, the first chip internal resistor R21, the second chip internal resistor R22, and the third chip internal resistor R23.

[0076] Specifically, the first transistor MOS1 is an N-channel MOS transistor.

[0077] Reference Figure 1 、 Figure 4 and Figure 5 The anti-flash circuit 22 includes: an adjustment capacitor C1; one end of the adjustment capacitor C1 is connected to the control pin of the anti-flash chip U1, and the other end of the adjustment capacitor C1 is connected to the output pin of the anti-flash chip U1.

[0078] In this embodiment, the regulating capacitor C1 is used to perform filtering and compensation. The anti-stroboscopic chip U1 is combined with the regulating capacitor C1 to control the current of the light string 21 through a negative feedback mechanism.

[0079] Reference Figure 1 、 Figure 4 and Figure 5 , the lamp group 20 is one; the high-voltage lamp strip further includes a harmonic processing circuit 30, the input end of the harmonic processing circuit 30 is connected to the output end of the anti-flash circuit 22, and the output end of the harmonic processing circuit 30 is used to connect to the ground end.

[0080] In this embodiment, the harmonic processing circuit 30 is used to reduce the influence of harmonics in the circuit, thereby ensuring the stable operation of the circuit and the safety of electronic components in the circuit.

[0081] Reference Figure 1 、 Figure 4 and Figure 5 , the number of the lamp groups 20 is more than two; the high-voltage lamp strip further includes a harmonic processing circuit 30, and the harmonic processing circuit 30 includes a harmonic processing chip U2;

[0082] The output ends of the anti-flash circuit 22 of the multiple lamp groups 20 are connected to the connection pins of the harmonic processing chip U2 in sequence, and the positive ends of the lamp strings 21 of the second lamp group 20 in the multiple lamp groups 20 are connected to the connection pins of the harmonic processing chip U2 in sequence; the output pins of the harmonic processing chip U2 are used to connect to the ground end.

[0083] When the number of lamp groups 20 is three:

[0084] The positive terminal of the light string 21 in the first light group 20 is connected to the output terminal of the power inlet protection module 10, and the output terminal of the anti-flash circuit 22 in the first light group 20 is connected to the first connection pin of the harmonic processing chip U2;

[0085] The positive terminal of the light string 21 in the second light group 20 is connected to the first connection pin of the harmonic processing chip U2, and the output end of the anti-flash circuit 22 in the second light group 20 is connected to the second connection pin of the harmonic processing chip U2;

[0086] The positive terminal of the light string 21 in the third light group 20 is connected to the second connection pin of the harmonic processing chip U2, and the output end of the anti-flash circuit 22 in the third light group 20 is connected to the third connection pin of the harmonic processing chip U2.

[0087] Specifically, the positive terminal of the light string 21 in the first light group 20 is connected to the output end of the power inlet protection module 10, that is: the positive terminal of the light string 21 in the first light group 20 is connected to the output end of the rectifier circuit DB.

[0088] In this embodiment, the harmonic processing circuit 30 implements multi-stage driving and performs power compensation for the corresponding lamp groups 20 within a certain input voltage range, that is, the lamp voltage of different lamp groups 20 is flexibly set to adapt to the voltage in different areas, thereby improving the utilization rate and total output lumens of the high-voltage lamp strip.

[0089] Specifically, the model of the harmonic processing chip U2 is RM9001DF, and its package type is ESOP-8.

[0090] See Figure 6 , the internal structure of the harmonic processing chip U2 includes a driving logic module 321, a power supply module 322, a power compensation module 323, a detection module 324, a parameter calibration module 325, a second transistor MOS2, a third transistor MOS3 and a fourth transistor MOS4;

[0091] The gates of the second transistor MOS2, the third transistor MOS3, and the fourth transistor MOS4 are all connected to the driving logic module 321, and the sources of the second transistor MOS2, the third transistor MOS3, and the fourth transistor MOS4 are all connected to the detection module 324. The sources of the second transistor MOS2, the third transistor MOS3, and the fourth transistor MOS4 are also connected to the CS pin of the harmonic processing chip U2; the drain of the second transistor MOS2 is connected to the D1 pin of the harmonic processing chip U2, the drain of the third transistor MOS3 is connected to the D2 pin of the harmonic processing chip U2, and the drain of the fourth transistor MOS4 is connected to the D3 pin of the harmonic processing chip U2;

[0092] The input end of the power supply module 322 is connected to the D1 pin of the harmonic processing chip U2, the output end of the power supply module 322 is connected to the drive logic module 321, the parameter calibration module 325 is connected to the drive logic module 321, the power compensation module 323 is respectively connected to the detection module 324, the drive logic module 321, and the CP pin of the harmonic processing chip U2, and the input end of the detection module 324 is connected to the CS pin of the harmonic processing chip U2.

[0093] The detection module 324 is used to implement over-temperature detection and over-voltage detection. The parameter calibration module 325 is used to calibrate the parameters of the harmonic processing chip U2.

[0094] The GND pin of the harmonic processing chip U2 is connected to the fourth terminal of the rectifier circuit DB. The output pin of the harmonic processing chip U2 is the GND pin of the harmonic processing chip U2.

[0095] Specifically, the second transistor MOS2, the third transistor MOS3 and the fourth transistor MOS4 are all N-channel MOS transistors.

[0096] The harmonic processing chip U2 is internally provided with an over-temperature control function and a power compensation function, so that the power remains stable within the input voltage range; the harmonic processing chip U2 is also provided with an overvoltage protection function, so that the high-voltage light strip is suitable for high-power surge situations.

[0097] Reference Figure 1 , the harmonic processing circuit 30 further includes a voltage protection module 31; the voltage protection module 31 includes: a first protection diode D31, a first varistor MOV3;

[0098] The cathode of the first protection diode D31 is connected to the output end of the anti-flash circuit 22 of the last lamp group 20, and the anode of the first protection diode D31 is connected to the ground end;

[0099] One end of the first varistor MOV3 is connected to the output end of the anti-flash circuit 22 of the last lamp group 20 , and the other end of the first varistor MOV3 is connected to the ground end.

[0100] In this embodiment, the first varistor MOV3 is used for surge protection to absorb energy of bidirectional overvoltage, and the first protection diode D31 is used for clamping protection against forward overvoltage.

[0101] When the first protection diode D31 is operating normally, it is in a reverse cutoff state and has no effect on the circuit. When a forward voltage spike appears at the output of the anti-flash circuit 22, the first protection diode D31 quickly breaks down and conducts, limiting the voltage to a safe range and preventing damage to the back-end circuit.

[0102] When the voltage at the output of the lightning protection circuit 22 is normal, the first varistor MOV3 is in a high-impedance state and has no load effect on the circuit. When the voltage exceeds its varistor voltage threshold, the resistance of the first varistor MOV3 drops sharply, absorbing the surge energy and suppressing the voltage increase.

[0103] When the first varistor MOV3 and the first protection diode D31 work together, the first varistor MOV3 is used to absorb low-frequency high-energy surges, and the first protection diode D31 is used to quickly respond to high-frequency spikes, thereby expanding the protection range.

[0104] Reference Figures 1 to 3 The high-voltage light strip also includes a bus capacitor C3; one end of the bus capacitor C3 is connected to the output end of the power inlet protection module 10 and the positive end of the light string 21 of the first light group 20; the other end of the bus capacitor C3 is used to connect to the ground end.

[0105] In this embodiment, the bus capacitor C3 is used to perform low-pass filtering on the voltage output by the rectifier circuit DB. This removes the high-frequency ripple generated by the rectifier circuit DB and reduces the voltage fluctuation amplitude, making the DC voltage supplied to the lamp group 20 more stable.

[0106] Reference Figure 4 Each of the lamp groups 20 further includes a second protection diode D21; the anode of the second protection diode D21 of the first lamp group 20 among the multiple lamp groups 20 is connected to the output end of the power inlet protection module 10, and the anodes of the second protection diodes D21 of the multiple lamp groups 20 are connected to the connection pins of the harmonic processing chip U2 in sequence starting from the anode of the second lamp group 20; the cathode of the second protection diode D21 is connected to the positive end of the lamp string 21 of the corresponding lamp group 20.

[0107] In this embodiment, a second protection diode D21 is used to prevent reverse voltage from occurring at the positive electrode of the light string 21. When a negative pulse is generated at the input end of the light group 20 due to a fault or interference, the second protection diode D21 is immediately turned on to clamp the voltage, thereby preventing the light string 21 from being damaged due to reverse breakdown, thereby improving the anti-interference ability and reliability of the high-voltage light strip.

[0108] Reference Figure 4 , the anti-flash circuit 22 further includes: an electrolytic capacitor CE1 and a first protection resistor R2;

[0109] The positive electrode of the electrolytic capacitor CE1 is connected to the negative electrode of the second protection diode D21 and the positive terminal of the light string 21, and the negative electrode of the electrolytic capacitor CE1 is connected to the output pin of the anti-strobe chip U1;

[0110] One end of the first protection resistor R2 is connected to the positive electrode of the electrolytic capacitor CE1 , and the other end of the first protection resistor R2 is connected to the negative electrode of the electrolytic capacitor CE1 .

[0111] In this embodiment, the charge and discharge characteristics of the electrolytic capacitor CE1 are used to smooth current fluctuations, preventing dimming of the light string 21. The first protective resistor R2 is used to protect the electrolytic capacitor CE1 and the light string 21, thereby improving the light quality and reliability of the light string 21.

[0112] Reference Figure 1 , the harmonic processing circuit 30 further includes: a harmonic processing resistor RS, a harmonic processing capacitor C2;

[0113] One end of the harmonic processing resistor RS is connected to the constant current sampling pin of the harmonic processing chip U2, and the other end of the harmonic processing resistor RS is used to connect to the ground end;

[0114] One end of the harmonic processing capacitor C2 is connected to the constant power compensation pin of the harmonic processing chip U2, and the other end of the harmonic processing capacitor C2 is used to connect to the ground end.

[0115] In this embodiment, harmonic processing resistor RS acts as a sampling resistor, processing the harmonic current in the circuit for real-time monitoring and analysis by harmonic processing chip U2. Adjusting the resistance of harmonic processing resistor RS precisely sets the operating current of the MOS transistor within harmonic processing chip U2. Harmonic processing capacitor C2, in conjunction with the circuitry within harmonic processing chip U2, performs phase compensation on the detected harmonics, aligning the input current and voltage, improving the power factor, and maintaining the negative voltage of light string 21.

[0116] The connection pins of the harmonic processing chip U2 include D1 pin, D2 pin, D3 pin, etc. The number of the connection pins is adjusted according to the number of lamp groups 20 set.

[0117] The constant current sampling pin of the harmonic processing chip U2 is the CS pin of the harmonic processing chip U2.

[0118] The constant power compensation pin of the harmonic processing chip U2 is the CP pin of the harmonic processing chip U2.

[0119] In some embodiments, the lamp group 20 is provided with three, and correspondingly, the connection pins of the harmonic processing chip U2 include pins D1, D2, and D3.

[0120] The output end of the anti-flash circuit 22 in the first light group 20 is connected to the D1 pin of the harmonic processing chip U2. The positive end of the light string 21 in the second light group 20 is connected to the D1 pin of the harmonic processing chip U2, and the output end of the anti-flash circuit 22 in the second light group 20 is connected to the D2 pin of the harmonic processing chip U2. The positive end of the light string 21 in the third light group 20 is connected to the D2 pin of the harmonic processing chip U2, and the output end of the anti-flash circuit 22 in the third light group 20 is connected to the D3 pin of the harmonic processing chip U2.

[0121] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. A high-voltage light strip, including a power-in protection module, characterized in that: The high-voltage light strip further comprises: at least one light group; Each of the lamp groups comprises: A light string, wherein the positive terminal of the light string is connected to the output terminal of the power inlet protection module; an anti-flash circuit, wherein the input end of the anti-flash circuit is connected to the negative terminal of the light string, and the output end of the anti-flash circuit is used to connect to the ground terminal; A TVS tube, wherein the cathode of the TVS tube is connected to the input end of the anti-flash circuit, and the anode of the TVS tube is connected to the output end of the anti-flash circuit.

2. The high-voltage light strip according to claim 1, characterized in that: The anti-flash circuit comprises: An anti-stroboscopic chip, wherein the input pin of the anti-stroboscopic chip is connected to the negative terminal of the light string and the negative electrode of the TVS tube, and the output pin of the anti-stroboscopic chip is connected to the positive electrode of the TVS tube; An adjusting resistor, one end of which is connected to the input pin of the anti-stroboscopic chip, and the other end of which is connected to the control pin of the anti-stroboscopic chip.

3. The high-voltage light strip according to claim 2, characterized in that: The anti-stroboscopic circuit includes: an adjustment capacitor; one end of the adjustment capacitor is connected to the control pin of the anti-stroboscopic chip, and the other end of the adjustment capacitor is connected to the output pin of the anti-stroboscopic chip.

4. The high-voltage light strip according to claim 1, characterized in that: There is one lamp group; the high-voltage lamp strip further includes a harmonic processing circuit, the input end of the harmonic processing circuit is connected to the output end of the anti-flash circuit, and the output end of the harmonic processing circuit is used to connect to the ground end.

5. The high-voltage light strip according to claim 2, characterized in that: There are more than two lamp groups; the high-voltage lamp strip further includes a harmonic processing circuit, and the harmonic processing circuit includes a harmonic processing chip; The output ends of the anti-flash circuits of the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence, and the positive ends of the lamp strings from the second lamp group in the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence; the output pins of the harmonic processing chip are used to connect to the ground end.

6. The high-voltage light strip according to claim 5, characterized in that: The harmonic processing circuit also includes a voltage protection module; The voltage protection module includes: a first protection diode, wherein the cathode of the first protection diode is connected to the output end of the anti-flash circuit of the last lamp group, and the anode of the first protection diode is connected to the ground end; A first varistor, one end of the first varistor is connected to the output end of the anti-flash circuit of the last lamp group, and the other end of the first varistor is used to connect to the ground end.

7. The high-voltage light strip according to claim 5, characterized in that: The high-voltage light strip also includes a bus capacitor; one end of the bus capacitor is connected to the output end of the power-in protection module and the positive end of the light string of the first light group; the other end of the bus capacitor is used to connect to the ground end.

8. The high-voltage light strip according to claim 5, characterized in that: Each of the lamp groups also includes a second protection diode; the positive pole of the second protection diode of the first lamp group among the multiple lamp groups is connected to the output end of the power input protection module, and the positive poles of the second protection diodes from the second lamp group among the multiple lamp groups are connected to the connection pins of the harmonic processing chip in sequence; the negative pole of the second protection diode is connected to the positive end of the lamp string corresponding to the lamp group.

9. The high-voltage light strip according to claim 8, characterized in that: The anti-flash circuit also includes: an electrolytic capacitor, wherein the positive electrode of the electrolytic capacitor is connected to the negative electrode of the second protection diode and the positive terminal of the light string, and the negative electrode of the electrolytic capacitor is connected to the output pin of the anti-strobe chip; A first protective resistor, one end of the first protective resistor is connected to the positive electrode of the electrolytic capacitor, and the other end of the first protective resistor is connected to the negative electrode of the electrolytic capacitor.

10. The high-voltage light strip according to any one of claims 5 to 9, characterized in that: The harmonic processing circuit further includes: A harmonic processing resistor, one end of which is connected to the constant current sampling pin of the harmonic processing chip, and the other end of which is connected to the ground terminal; A harmonic processing capacitor, one end of which is connected to the constant power compensation pin of the harmonic processing chip, and the other end of which is used to connect to the ground end.

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