Drive circuit of LED lighting device and LED lighting device

Abstract

The utility model belongs to the technical field of lighting, and discloses a drive circuit of an LED lighting device and the LED lighting device, and the drive circuit of the LED lighting device comprises a lighting circuit, an AC / DC conversion circuit and an emergency circuit. The AC-DC conversion circuit is connected with an external AC power supply and is used for driving the lighting circuit; the lighting circuit comprises a first lighting circuit, the emergency circuit comprises an emergency power supply, a first resistance matching network and a first driving chip, and when the alternating current and direct current conversion circuit loses power, the emergency power supply is started through the first driving chip and supplies power to the first lighting circuit. The LED lighting device can continue to be used after a power grid loses power, inconvenience and safety risks of people in the dark are reduced, the adaptability to sudden power failure is improved, and production and life losses caused by power interruption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a driving circuit of an LED lighting device and an LED lighting device. Background Art

[0002] In modern society, with the continuous development of science and technology, LED energy-saving bulbs have emerged one after another, and various functions have been increasing. However, in daily life, the problems of energy shortage and regional power outages are serious, resulting in these products being unable to work when the power grid is out of power. During a power outage, the lack of lighting increases the risk of accidents such as tripping or other safety problems for people in homes and public places. And in order to use these bulbs during a power outage, an additional backup power supply system such as a generator may be required, increasing the cost and complexity. Summary of the Utility Model

[0003] The main purpose of this application is to provide a driving circuit of an LED lighting device and an LED lighting device, aiming to solve the technical problem that existing lighting devices cannot continue to be used after the power grid loses power.

[0004] To achieve the above purpose, the utility model proposes a driving circuit of an LED lighting device, including a lighting circuit, an AC-DC conversion circuit, and an emergency circuit;

[0005] The AC-DC conversion circuit is connected to an external AC power supply and is used to drive the lighting circuit;

[0006] The lighting circuit includes a first lighting circuit. The emergency circuit includes an emergency power supply, a first resistor matching network, and a first driving chip. The positive terminal of the emergency power supply is connected to the BATP terminal of the first driving chip. One end of the negative terminal of the emergency power supply connected to the GND terminal of the first driving chip is grounded. One end of the first resistor matching network is connected to the EN terminal of the first driving chip, and the other end is connected to the positive terminal of the first lighting circuit. The negative terminal of the first lighting circuit is grounded. The VL terminal of the first driving chip is connected to the positive terminal of the AC-DC conversion circuit. The VN terminal of the first driving chip is connected to the negative terminal of the AC-DC conversion circuit and is grounded, and is used to collect the signals of the positive terminal and the negative terminal of the AC-DC conversion circuit. When the AC-DC conversion circuit loses power, the emergency power supply is started through the first driving chip and supplies power to the first lighting circuit.

[0007] Further, the lighting circuit further includes a second lighting circuit. The AC-DC conversion circuit includes a rectifier bridge, a first capacitor matching network, a second driving chip, and a second resistor matching network. The signal input pins of the rectifier bridge are connected to the external AC power supply. One end of the first capacitor matching network is connected to the signal output pin of the rectifier bridge, and the other end is connected to one end of the second driving chip. The other end of the second driving chip is connected to one end of the second resistor matching network and is connected to the positive terminal of the second lighting circuit. The positive terminal of the first lighting circuit is connected to the negative terminal of the second lighting circuit. The other end of the second resistor matching network is grounded.

[0008] Further, the signal input pins of the rectifier bridge include a first signal input pin and a second signal input pin. The first signal input pin is connected to the L terminal of the external AC power supply, and the second signal input pin is connected to the N terminal of the external AC power supply. A fuse is connected between the L terminal of the external AC power supply and the first signal input pin.

[0009] Further, the signal output pins of the rectifier bridge include a first signal output pin and a second signal output pin. The first capacitor matching network includes a first inductor, and a first capacitor and a second capacitor connected in parallel. One end of the first capacitor is connected to the first signal output pin, and the other end is connected to the second signal output pin. One end of the second capacitor is connected to one end of the first capacitor and is connected to the VIN terminal of the second driving chip, and the other end is connected to the other end of the first capacitor and is connected to the GND terminal of the second driving chip. The first inductor is connected between one end of the first capacitor and one end of the second capacitor.

[0010] Further, the second resistor matching network includes a second inductor, a first resistor unit, and a third capacitor. One end of the second inductor is connected to the DRAIN terminal of the second driving chip, and the other end is grounded. One end of the first resistor unit is connected to the CS terminal of the second driving chip, and the other end is connected to the line connecting the GND terminal of the second driving chip and the ground. One end of the third capacitor is connected to the other end of the first resistor unit, and the other end is connected to the other end of the second inductor and is grounded.

[0011] Further, the first resistor unit includes a first resistor and a second resistor connected in parallel. One end of the first resistor is connected to the CS terminal of the second driving chip, and the other end is connected to the line connecting the GND terminal of the second driving chip and one end of the third capacitor. One end of the second resistor is connected to one end of the first resistor, and the other end is connected to the line between the other end of the first resistor and one end of the third capacitor.

[0012] Further, the first resistor matching network includes a third resistor and a fourth resistor connected in parallel. One end of the third resistor and the fourth resistor is connected to the EN terminal of the first driving chip, and the other end of the third resistor and the fourth resistor is connected to the positive terminal of the first lighting circuit.

[0013] Further, the emergency circuit further includes a fourth capacitor and a control diode. One end of the fourth capacitor is connected to the line connecting the positive terminal of the emergency power supply and the BATP terminal of the first driving chip, and the other end is connected to the line connecting the negative terminal of the emergency power supply and the GND terminal of the first driving chip. The positive terminal of the control diode is connected to the line connecting the positive terminal of the second lighting circuit and the negative terminal of the first lighting circuit, and the negative terminal is connected to the VDD terminal of the first driving chip.

[0014] Further, the first lighting circuit includes at least one first light-emitting diode and a plurality of second light-emitting diodes connected in series with the first light-emitting diode, and the plurality of second light-emitting diodes are connected in parallel; the second lighting circuit includes a plurality of third light-emitting diodes connected in series.

[0015] The present utility model further provides an LED lighting device, which includes the driving circuit of the LED lighting device according to any one of the above embodiments, and further includes a lamp head, a lamp cup, a circuit board, and a lamp shade;

[0016] The lamp head is arranged at the bottom of the lamp cup and forms a receiving cavity for placing the circuit board in the lamp cup. The lamp shade is arranged at one end of the lamp cup away from the lamp head, and a plurality of heat dissipation holes are arranged on the lamp cup.

[0017] Beneficial effects:

[0018] The lighting circuit of the present utility model includes a first lighting circuit. The emergency circuit includes an emergency power supply, a first resistor matching network, and a first driving chip. The positive terminal of the emergency power supply is connected to the BATP terminal of the first driving chip. One end of the negative terminal of the emergency power supply connected to the GND terminal of the first driving chip is grounded. One end of the first resistor matching network is connected to the EN terminal of the first driving chip, and the other end is connected to the positive terminal of the first lighting circuit. The negative terminal of the first lighting circuit is grounded. The VL terminal of the first driving chip is connected to the positive terminal of the AC-DC conversion circuit, and the VN terminal of the first driving chip is connected to the negative terminal of the AC-DC conversion circuit and grounded, for collecting signals of the positive terminal and the negative terminal of the AC-DC conversion circuit. When the AC-DC conversion circuit loses power, the emergency power supply is started through the first driving chip and supplies power to the first lighting circuit. Therefore, by setting the emergency circuit, the LED lighting device can continue to be used after the power grid loses power, which can ensure sufficient lighting in the indoor or outdoor environment, reduce the inconvenience and safety risks of people in the dark, extend the service life of the LED bulb, contribute to coping with emergencies or long-term power outages before power restoration, and make the building or place more prepared for emergencies, improve the adaptability to sudden power outages, and help reduce production and life losses caused by power interruptions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the driving circuit of the LED lighting device according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of the lighting circuit according to an embodiment of the present utility model;

[0021] Figure 3 is a schematic diagram of the AC-DC conversion circuit according to an embodiment of the present utility model;

[0022] Figure 4 is a schematic diagram of the emergency circuit according to an embodiment of the present utility model;

[0023] Figure 5 is a schematic diagram of the first driving chip according to an embodiment of the present utility model;

[0024] Figure 6 is a schematic diagram of the second driving chip according to an embodiment of the present utility model;

[0025] Figure 7 is a schematic diagram of the overall LED lighting device according to an embodiment of the present utility model.

[0026] Wherein:

[0027] 1. Lighting circuit; 2. AC / DC conversion circuit; 3. Emergency circuit; 4. Lamp holder; 5. Lamp cup; 6. Lamp shade; 7. Heat dissipation holes;

[0028] 10. First lighting circuit; 11. Second lighting circuit;

[0029] 101. First light-emitting diode; 102. Second light-emitting diode;

[0030] 110. Third light-emitting diode;

[0031] DB1. Rectifier bridge; 20. First capacitor matching network; U1. Second driver chip; 21. Second resistor matching network; FR. Fuse;

[0032] LD1. First inductor; CE1. First capacitor; CE2. Second capacitor;

[0033] LD2. Second inductor; 210. First resistor unit; CY1. Third capacitor; C3. Fifth capacitor; C4. Sixth capacitor; C1. Seventh capacitor;

[0034] RS1. First resistor; RS2. Second resistor;

[0035] BT1. Emergency power supply; 30. First resistor matching network; U2. First driver chip; C2. Fourth capacitor; D1. Control diode;

[0036] R1. Third resistor; R2. Fourth resistor.

[0037] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0038] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0042] Refer to Figures 1 - 6 , a driving circuit of an LED lighting device, comprising a lighting circuit 1, an AC-DC conversion circuit 2, and an emergency circuit 3;

[0043] The AC-DC conversion circuit 2 is connected to an external AC power supply and is used to drive the lighting circuit 1;

[0044] The lighting circuit 1 includes a first lighting circuit 10. The emergency circuit 3 includes an emergency power supply BT1 and a first resistor matching network 30, as well as a first driving chip U2 connected to the external AC power supply. The positive terminal of the emergency power supply BT1 is connected to the BATP terminal of the first driving chip U2. One end of the negative terminal of the emergency power supply BT1 connected to the GND terminal of the first driving chip U2 is grounded. One end of the first resistor matching network 30 is connected to the EN terminal of the first driving chip U2, and the other end is connected to the positive terminal of the first lighting circuit 10. The negative terminal of the first lighting circuit 10 is grounded. The VL terminal of the first driving chip U2 is connected to the positive terminal of the AC-DC conversion circuit 2, and the VN terminal of the first driving chip U2 is connected to the negative terminal of the AC-DC conversion circuit 2 and grounded, for collecting signals of the positive terminal and the negative terminal of the AC-DC conversion circuit 2. When the AC-DC conversion circuit 2 loses power, the emergency power supply BT1 is started through the first driving chip U2 and supplies power to the first lighting circuit 10.

[0045] In the above embodiments, the drive circuit of the LED lighting device includes a lighting circuit 1, an AC-DC conversion circuit 2, and an emergency circuit 3. One end of the AC-DC conversion circuit 2 is connected to an external AC power supply, and the other end is connected to the lighting circuit 1, so that the AC-DC conversion circuit 2 converts the external AC power supply into a DC power supply suitable for driving the LED to supply the lighting circuit 1 for use. The external AC power supply is preferably an AC power supply of 120-240V and a frequency of 50 or 60Hz; the lighting circuit 1 includes a first lighting circuit 10 for driving a part of the LED light strips or LED devices. The emergency circuit 3 includes a first drive chip U2, an emergency power supply BT1, and a first resistor matching network 30. The first drive chip U2 is preferably an integrated circuit of model QW2889F, and the emergency power supply BT1 is preferably a plurality of 3.7V cylindrical lithium batteries. One end of the first resistor matching network 30 is connected to the EN end of the first drive chip U2, and the other end is connected to the positive terminal of the first lighting circuit 10. The BATP end of the first drive chip U2 is connected to the positive terminal of the emergency power supply BT1, the GND end of the first drive chip U2 is grounded, the negative terminal of the emergency power supply BT1 is connected to the line between the GND end of the first drive chip U2 and the ground. One end of the first resistor matching network 30 is connected to the EN end of the first drive chip U2, the other end of the first resistor matching network 30 is connected to the positive terminal of the first lighting circuit 10, the negative terminal of the first lighting circuit 10 is grounded, the VL end of the first drive chip U2 is preferably directly connected to the L end of the external AC power supply, and the VN end of the first drive chip U2 is preferably directly connected to the N end of the external AC power supply, which is used to charge the emergency power supply BT1 in the emergency circuit 3 when the power grid is working normally, and is also used to collect the signals of the positive terminal and the negative terminal of the AC-DC conversion circuit 2; when the AC-DC conversion circuit 2 fails, the emergency power supply BT1 automatically takes over. After the first drive chip U2 senses the failure of the main power supply, it receives the power support of the emergency power supply BT1 through the BATP end. The first resistor matching network 30 ensures that the first drive chip U2 can correctly activate the first lighting circuit 10, ensuring that the LEDs corresponding to the first lighting circuit 10 continue to provide lighting in case of emergency. Therefore, by setting the emergency circuit 3, the LED lighting device can continue to be used after the power grid loses power, which can ensure that there is sufficient lighting in the indoor or outdoor environment, reduce the inconvenience and safety risks of people in the dark, extend the service life of the LED bulb, help to cope with emergencies or long-term power outages before the power is restored, and make the building or place more prepared for emergencies, improve the adaptability to sudden power outages, and help to reduce the production and life losses caused by power outages.

[0046] Refer to Figures 1 - 3 and Figure 6, in one embodiment, the lighting circuit 1 further includes a second lighting circuit 11. The AC-DC conversion circuit 2 includes a rectifier bridge DB1, a first capacitor matching network 20, a second driving chip U1, and a second resistor matching network 21. The signal input pin of the rectifier bridge DB1 is connected to the external AC power supply. One end of the first capacitor matching network 20 is connected to the signal output pin of the rectifier bridge DB1, and the other end is connected to one end of the second driving chip U1. The other end of the second driving chip U1 is connected to one end of the second resistor matching network 21 and is connected to the positive terminal of the second lighting circuit 11. The positive terminal of the first lighting circuit 10 is connected to the negative terminal of the second lighting circuit 11. The other end of the second resistor matching network 21 is grounded.

[0047] In the above embodiment, the lighting circuit 1 further includes a second lighting circuit 11. The second lighting circuit 11 is connected in series with the first lighting circuit 10. The second lighting circuit 11 is used to drive another part of the LED strip or LED device. The AC-DC conversion circuit 2 includes a rectifier bridge DB1, a first capacitor matching network 20, a second driving chip U1, and a second resistor matching network 21. The signal input pin of the rectifier bridge DB1 is connected to the external AC power supply. Four diodes are connected inside the rectifier bridge DB1 to form a bridge rectifier diode. The second driving chip U1 is preferably an integrated circuit of model JW19925M to convert the AC power supply into a DC power supply. One end of the first capacitor matching network 20 is connected to the signal output pin of the rectifier bridge DB1, and the other end of the first capacitor matching network 20 is connected to one end of the second driving chip U1 to ensure that the converted DC power supply can be received. The other end of the second driving chip U1 is connected to one end of the second resistor matching network 21. The other end of the second resistor matching network 21 is connected to the positive terminal of the second lighting circuit 11. The positive terminal of the first lighting circuit 10 is connected to the negative terminal of the second lighting circuit 11 to supply power to the LED lighting device and make it work normally. The other end of the second resistor matching network 21 is grounded to ensure the safety and stability of the circuit, effectively convert the external AC power supply into a DC power supply suitable for driving the LED lighting device, and ensure stability and safety during operation.

[0048] Referring to Figures 1 - 3 and Figure 6 , in one embodiment, the signal input pins of the rectifier bridge DB1 include a first signal input pin and a second signal input pin. The first signal input pin is connected to the L terminal of the external AC power supply, and the second signal input pin is connected to the N terminal of the external AC power supply. A fuse FR is connected between the L terminal of the external AC power supply and the first signal input pin.

[0049] In the above embodiment, the signal input pins of the rectifier bridge DB1 include a first signal input pin and a second signal input pin. The first signal input pin is connected to the L terminal (i.e., the phase line) of the external AC power supply to obtain electrical energy from the AC power supply for subsequent rectification and power conversion processes. The second signal input pin is connected to the N terminal (i.e., the neutral line) of the external AC power supply to provide a return path for the current, ensuring that the rectifier bridge DB1 can operate normally during the power conversion process. Additionally, a fuse FR is connected between the L terminal (phase line) of the external AC power supply and the first signal input pin. Preferably, the fuse FR has a rated current of 10A and a power of 1W, which is used to blow when the current exceeds the safety rated value to prevent the devices or components in the circuit from being damaged due to overload or causing safety risks. The fuse FR protects the rectifier bridge DB1 and its subsequent circuits from the harm of current overload here. Additionally, a fifth capacitor C3 can be connected between the L terminal of the external AC power supply and the grounded line, or a sixth capacitor C4 can be connected between the N terminal of the external AC power supply and the grounded line, which can absorb and filter high-frequency noise or electromagnetic interference, making the output of the power line cleaner and more stable, and contributing to improving the working efficiency and signal quality of the entire circuit.

[0050] Referring to Figures 1 - 3 and Figure 6 In an embodiment, the signal output pins of the rectifier bridge DB1 include a first signal output pin and a second signal output pin. The first capacitor matching network 20 includes a first inductor LD1, and a first capacitor CE1 and a second capacitor CE2 connected in parallel. One end of the first capacitor CE1 is connected to the first signal output pin, and the other end is connected to the second signal output pin. One end of the second capacitor CE2 is connected to one end of the first capacitor CE1 and to the VIN terminal of the second driver chip U1, and the other end is connected to the other end of the first capacitor CE1 and to the GND terminal of the second driver chip U1. The first inductor LD1 is connected between one end of the first capacitor CE1 and one end of the second capacitor CE2.

[0051] In the above embodiments, the signal output pins of the rectifier bridge DB1 include a first signal output pin and a second signal output pin. The first capacitor matching network 20 includes a first inductor LD1, a first capacitor CE1, and a second capacitor CE2. The first capacitor CE1 and the second capacitor CE2 are connected in parallel. One end of the first capacitor CE1 is connected to the first signal output pin, and the other end of the first capacitor CE1 is connected to the second signal output pin. One end of the second capacitor CE2 is connected to one end of the first capacitor CE1, and at the same time, one end of the second capacitor CE2 is connected to the VIN terminal of the second driving chip U1. The other end of the second capacitor CE2 is connected to the other end of the first capacitor CE1, and at the same time, the other end of the second capacitor CE2 is connected to the GND terminal of the second driving chip U1. The first capacitor CE1 and the second capacitor CE2 are preferably polarized capacitors with a capacitance value of 3.3 microfarads and a rated voltage of 400 volts. By connecting the polarized capacitors to different signal output pins, noise or interference of a specific frequency can be filtered out, thereby improving the quality and stability of the signal. In addition, one end of the first inductor LD1 is connected to one end of the first capacitor CE1, and the other end of the first inductor LD1 is connected to one end of the second capacitor CE2, so that the first inductor LD1 is connected between one end of the first capacitor CE1 and one end of the second capacitor CE2. The first inductor LD1 is preferably an inductor with an inductance value of 3.3 millihenries, which reduces the electromagnetic interference transmitted between the first capacitor CE1 and the second capacitor CE2, thereby improving the signal quality and system stability and ensuring the effective propagation of the signal in the entire circuit.

[0052] Referring to Figures 1 - 3 and Figure 6 , in one embodiment, the second resistor matching network 21 includes a second inductor LD2, a first resistor unit 210, and a third capacitor CY1. One end of the second inductor LD2 is connected to the DRAIN terminal of the second driving chip U1, and the other end is grounded. One end of the first resistor unit 210 is connected to the CS terminal of the second driving chip U1, and the other end is connected to the line connecting the GND terminal of the second driving chip U1 and the ground. One end of the third capacitor CY1 is connected to the other end of the first resistor unit 210, and the other end is connected to the other end of the second inductor LD2 and grounded.

[0053] In the above embodiment, the second resistor matching network 21 includes a second inductor LD2, a first resistor unit 210, and a third capacitor CY1. One end of the second inductor LD2 is connected to the DRAIN terminal of the second driving chip U1, establishing an electrical connection between the second inductor LD2 and the driving chip. The other end of the second inductor LD2 is connected to ground. At the same time, the positive terminal of the first lighting line is connected to the line between the other end of the second inductor LD2 and ground. Additionally, a seventh capacitor C1 can be connected between the positive terminal of the first lighting line and the other end of the second inductor LD2. And the second inductor LD2 is preferably an inductor with an inductance value of 2.5 mH. One end of the first resistor unit 210 is connected to the CS terminal of the second driving chip U1, establishing a connection between the first resistor unit 210 and the CS terminal of the driving chip. The other end of the first resistor unit 210 is connected to a line that is connected to the GND terminal of the second driving chip U1 and finally connected to ground. The first resistor unit 210 is connected to ground through the line and the GND terminal of the second driving chip U1. One end of the third capacitor CY1 is connected to the other end to which the first resistor unit 210 is connected. The other end of the third capacitor CY1 is connected to the other end of the second inductor LD2 and grounded. The third capacitor CY1 is preferably a capacitor with a capacitance value of 1 nF and a rated voltage of 500 V. By appropriately selecting the inductor and capacitor, a filtering effect for a specific frequency range can be achieved. The combination of the second inductor LD2, the first resistor unit 210, and the third capacitor CY1 may be used to suppress or enhance the signal components of a specific frequency to meet the requirements of the circuit and ensure the transmission efficiency and quality of the signal in the circuit.

[0054] Referring to Figures 1 - 3 and Figure 6 , in one embodiment, the first resistor unit 210 includes a first resistor RS1 and a second resistor RS2 connected in parallel. One end of the first resistor RS1 is connected to the CS terminal of the second driving chip U1, and the other end is connected to the line between the GND terminal of the second driving chip U1 and one end of the third capacitor CY1. One end of the second resistor RS2 is connected to one end of the first resistor RS1, and the other end is connected to the line between the other end of the first resistor RS1 and one end of the third capacitor CY1.

[0055] In the above embodiment, the first resistor unit 210 includes a first resistor RS1 and a second resistor RS2, and the first resistor RS1 and the second resistor RS2 are connected in parallel. One end of the first resistor RS1 is connected to the CS terminal of the second driving chip U1, and the other end of the first resistor RS1 is connected to the line where one end of the third capacitor CY1 is connected to the GND terminal of the second driving chip U1. The first resistor RS1 is preferably a resistor with a resistance value of 9.1 ohms, which is used to limit the current from the second driving chip U1 to the third capacitor CY1. By limiting the current, the second driving chip U1 and the third capacitor CY1 can be protected from overcurrent damage, and at the same time, the stable operation of the circuit can be ensured. One end of the second resistor RS2 is connected to one end of the first resistor RS1, and the other end of the second resistor RS2 is connected to the line between the other end of the first resistor RS1 and one end of the third capacitor CY1. The second resistor RS2 is preferably a resistor with a resistance value of 3.0 ohms. In a parallel circuit, the second resistor RS2 helps to share the current load from the second driving chip U1. By being connected in parallel with the first resistor RS1, it can disperse the current, thereby reducing the current density on each resistor and reducing the heat generation and current stress of the first resistor RS1 and the second resistor RS2.

[0056] Referring to Figures 1 - 2 , Figure 4 , Figure 5 , in one embodiment, the first resistor matching network 30 includes a third resistor R1 and a fourth resistor R2 connected in parallel. One end of the third resistor R1 and the fourth resistor R2 is connected to the EN terminal of the first driving chip U2, and the other end of the third resistor R1 and the fourth resistor R2 is connected to the positive terminal of the first lighting circuit 10.

[0057] In the above embodiment, the first resistor matching network 30 includes a third resistor R1 and a fourth resistor R2, and the third resistor R1 and the fourth resistor R2 are connected in parallel. One end of the third resistor R1 is connected to the EN terminal of the first driving chip U2, one end of the fourth resistor R2 is connected to the line where one end of the third resistor R1 is connected to the EN terminal of the first driving chip U2. One end where the other end of the third resistor R1 is connected to the other end of the fourth resistor R2 is connected to the positive terminal of the first lighting circuit 10. The third resistor R1 and the fourth resistor R2 are preferably resistors with a resistance value of 3.6 ohms each. Being connected in parallel means that the third resistor R1 and the fourth resistor R2 share the same voltage but can share different current loads, which helps to prevent damage to the first driving chip U2 or other circuit elements and improve the reliability and long-term stability of the entire emergency circuit 3.

[0058] Referring to Figures 1 - 2 , Figure 4 , Figure 5, in one embodiment, the emergency circuit 3 further includes a fourth capacitor C2 and a control diode D1. One end of the fourth capacitor C2 is connected to the line connecting the positive terminal of the emergency power supply BT1 and the BATP terminal of the first driving chip U2, and the other end is connected to the line connecting the negative terminal of the emergency power supply BT1 and the GND terminal of the first driving chip U2. The positive terminal of the control diode D1 is connected to the line connecting the positive terminal of the second lighting circuit 11 and the negative terminal of the first lighting circuit 10, and the negative terminal is connected to the VDD terminal of the first driving chip U2.

[0059] In the above embodiment, the emergency circuit 3 further includes a fourth capacitor C2, and the fourth capacitor C2 is preferably a capacitor with a capacitance value of 2.2 microfarads and a rated voltage of 10 volts. One end of the fourth capacitor C2 is connected to the line connecting the positive terminal of the emergency power supply BT1 and the BATP terminal of the first driving chip U2, and the other end of the fourth capacitor C2 is connected to the line connecting the negative terminal of the emergency power supply BT1 and the GND terminal of the first driving chip U2, and is used to provide a stable power supply to the first driving chip U2 (connected to the BATP terminal and the GND terminal) when the emergency power supply BT1 takes over the circuit power supply, which helps to smooth the power input, reduce voltage noise and fluctuations, and ensure the stable operation of the driving chip; the emergency circuit 3 further includes a control diode D1. The positive terminal of the control diode D1 is connected to the line connecting the positive terminal of the second lighting circuit 11 and the negative terminal of the first lighting circuit 10, and the negative terminal of the control diode D1 is connected to the VDD terminal of the first driving chip U2. When the main power supply is normally powered, the emergency circuit 3 is in a standby state. At this time, the fourth capacitor C2 will be connected to the positive terminal of the main power supply through the positive electrode, and the other end will be connected to the negative terminal of the main power supply through the negative electrode and connected to the corresponding ports (BATP and GND) of the first driving chip U2. The positive terminal of the control diode D1 is connected to the positive terminal of the second lighting circuit 11, and the negative terminal is connected to the negative terminal of the first lighting circuit 10 and the VDD terminal of the first driving chip U2. At this time, the circuit basically maintains the normal operation of the lighting. When the main power supply is interrupted, the emergency power supply takes over the circuit power supply. The function of the fourth capacitor C2 is to provide necessary power stability for the first driving chip U2 to prevent voltage fluctuations or short-term power outages from affecting its function. The control diode D1 plays a switching role in this case, enabling the circuit to work correctly under the emergency power supply, ensuring that the lights continue to operate, and ensuring safety and continuity.

[0060] Refer to Figures 1 - 2 , Figure 4 , Figure 5, in one embodiment, the first lighting circuit 10 includes at least one first light-emitting diode 101 and a plurality of second light-emitting diodes 102 connected in series with the first light-emitting diode 101, and the plurality of second light-emitting diodes 102 are connected in parallel; the second lighting circuit 11 includes a plurality of third light-emitting diodes 110 connected in series.

[0061] In the above embodiment, the first lighting circuit 10 includes at least one first light-emitting diode 101 and a plurality of second light-emitting diodes 102. The plurality of second light-emitting diodes 102 are connected in parallel and connected in series to the first light-emitting diode 101 to provide greater light intensity and coverage. The second lighting circuit 110 is composed of a plurality of third light-emitting diodes 110 connected in series. When the main power supply is normally powered, the first light-emitting diode 101 and the plurality of second light-emitting diodes 102 in the first lighting circuit 10 and the plurality of third light-emitting diodes 110 in the second lighting circuit 11 will receive current from the main power supply and emit corresponding light. Among them, the first light-emitting diode 101 and the second light-emitting diode 102 are preferably light-emitting diodes with a rated operating voltage of 3 volts, and the third light-emitting diode 110 is preferably a light-emitting diode with a rated operating voltage of 6 volts. If the main power supply suddenly interrupts, the emergency circuit 3 will be immediately activated. In the case of the failure of the main power supply, the emergency power supply takes over the power supply. At this time, the fourth capacitor C2 and the control diode D1 ensure that the first drive chip U2 continues to operate, so that the first lighting circuit 10 continues to work. The first light-emitting diode 101 and the parallel-connected second light-emitting diodes 102 in the first lighting circuit 10 will continue to be powered by the emergency power supply to provide sufficient light intensity to ensure that the lighting system can continue to operate effectively in the event of a power outage or other emergencies to provide necessary lighting and safety protection.

[0062] Referring to Figure 7 , the present invention also proposes an LED lighting device, which includes the drive circuit of the LED lighting device described in any one of the above embodiments, and further includes a lamp head 4, a lamp cup 5, a circuit board, and a lampshade 6;

[0063] The lamp head 4 is disposed at the bottom of the lamp cup 5 and forms a receiving cavity for placing the circuit board in the lamp cup 5. The lampshade 6 is disposed at one end of the lamp cup 5 away from the lamp head 4, and a plurality of heat dissipation holes 7 are provided on the lamp cup 5.

[0064] In the above embodiment, the driving circuit of the LED lighting device further includes a lamp cap 4, a lamp cup 5, a circuit board, and a lamp shade 6. The driving circuit is disposed on the circuit board. The lamp cap 4 is connected to the bottom of the lamp cup 5, and the connection manner includes but is not limited to screw connection or snap connection. And a receiving cavity is formed through the connection of the lamp cap 4 and the lamp body, so that the circuit board is disposed in the receiving cavity. A connecting portion with external threads is formed at the top end of the lamp cup 5, and the lamp shade 6 is screwed to the end of the lamp cup 5 away from the lamp cap 4. In addition, a plurality of heat dissipation holes 7 are provided at the end of the lamp cup 5 close to the lamp cap 4, and the plurality of heat dissipation holes 7 extend along the entire circumferential direction of the lamp cup 5, allowing air to flow freely, effectively reducing the working temperature of the LED lamp, improving the heat dissipation efficiency, and helping to extend the service life of the LED lamp.

[0065] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A driving circuit for an LED lighting device, characterized in that: Including lighting circuit, AC / DC conversion circuit, emergency circuit; The AC / DC conversion circuit is connected to an external AC power source and is used to drive the lighting circuit; The lighting circuit includes a first lighting circuit, and the emergency circuit includes an emergency power supply, a first resistance matching network and a first driver chip. The positive terminal of the emergency power supply is connected to the BATP terminal of the first driver chip, and one end of the negative terminal of the emergency power supply is connected to the GND terminal of the first driver chip and is grounded. One end of the first resistance matching network is connected to the EN terminal of the first driver chip, and the other end is connected to the positive terminal of the first lighting circuit, and the negative terminal of the first lighting circuit is grounded; the VL terminal of the first driver chip is connected to the positive terminal of the AC-DC conversion circuit, and the VN terminal of the first driver chip is connected to the negative terminal of the AC-DC conversion circuit and is grounded, and is used to collect signals from the positive terminal of the AC-DC conversion circuit and the negative terminal of the AC-DC conversion circuit. When the AC-DC conversion circuit loses power, the emergency power supply is started through the first driver chip, and power is supplied to the first lighting circuit.

2. The driving circuit of the LED lighting device according to claim 1, characterized in that: The lighting circuit also includes a second lighting circuit, and the AC-DC conversion circuit includes a rectifier bridge, a first capacitor matching network, a second driver chip and a second resistor matching network. The signal input pin of the rectifier bridge is connected to the external AC power supply, one end of the first capacitor matching network is connected to the signal output pin of the rectifier bridge, and the other end is connected to one end of the second driver chip, the other end of the second driver chip is connected to one end of the second resistor matching network and connected to the positive end of the second lighting circuit, the positive end of the first lighting circuit is connected to the negative end of the second lighting circuit, and the other end of the second resistor matching network is grounded.

3. The driving circuit of the LED lighting device according to claim 2, characterized in that: The signal input pins of the rectifier bridge include a first signal input pin and a second signal input pin, the first signal input pin is connected to the L end of the external AC power supply, the second signal input pin is connected to the N end of the external AC power supply, and a fuse is connected between the L end of the external AC power supply and the first signal input pin.

4. The driving circuit of the LED lighting device according to claim 2, characterized in that: The signal output pins of the rectifier bridge include a first signal output pin and a second signal output pin, the first capacitor matching network includes a first inductor, and a first capacitor and a second capacitor connected in parallel, one end of the first capacitor is connected to the first signal output pin, and the other end is connected to the second signal output pin, one end of the second capacitor is connected to one end of the first capacitor and connected to the VIN end of the second driver chip, and the other end is connected to the other end of the first capacitor and connected to the GND end of the second driver chip, and the first inductor is connected between one end of the first capacitor and one end of the second capacitor.

5. The driving circuit of the LED lighting device according to claim 2, characterized in that: The second resistance matching network includes a second inductor, a first resistance unit and a third capacitor, one end of the second inductor is connected to the DRAIN end of the second driving chip, and the other end is grounded, one end of the first resistance unit is connected to the CS end of the second driving chip, and the other end is connected to the line connecting the GND end of the second driving chip and the ground, one end of the third capacitor is connected to the other end of the first resistance unit, and the other end is connected to the other end of the second inductor and grounded.

6. The driving circuit of the LED lighting device according to claim 5, characterized in that: The first resistance unit includes a first resistor and a second resistor connected in parallel, one end of the first resistor is connected to the CS end of the second driving chip, and the other end is connected to the line connecting the GND end of the second driving chip and one end of the third capacitor, one end of the second resistor is connected to one end of the first resistor, and the other end is connected to the line between the other end of the first resistor and one end of the third capacitor.

7. The driving circuit of the LED lighting device according to claim 1, characterized in that: The first resistor matching network includes a third resistor and a fourth resistor connected in parallel, one end of the third resistor and the fourth resistor are connected to the EN terminal of the first driver chip, and the other end of the third resistor and the fourth resistor are connected to the positive terminal of the first lighting circuit.

8. The driving circuit of the LED lighting device according to claim 2, characterized in that: The emergency circuit also includes a fourth capacitor and a control diode, one end of the fourth capacitor is connected to the line connecting the positive end of the emergency power supply and the BATP end of the first driver chip, and the other end is connected to the line connecting the negative end of the emergency power supply and the GND end of the first driver chip, the positive end of the control diode is connected to the line connecting the positive end of the second lighting circuit and the negative end of the first lighting circuit, and the negative end is connected to the VDD end of the first driver chip.

9. The driving circuit of the LED lighting device according to claim 2, characterized in that: The first lighting circuit includes at least one first light emitting diode, and a plurality of second light emitting diodes connected in series with the first light emitting diode, and the plurality of second light emitting diodes are connected in parallel; the second lighting circuit includes a plurality of third light emitting diodes connected in series.

10. An LED lighting device, characterized in that: A driving circuit comprising the LED lighting device according to any one of claims 1 to 9, further comprising a lamp holder, a lamp cup, a circuit board, and a lampshade; The lamp holder is arranged at the bottom of the lamp cup, and a receiving cavity for placing the circuit board is formed in the lamp cup. The lampshade is arranged at one end of the lamp cup away from the lamp holder, and a plurality of heat dissipation holes are arranged on the lamp cup.

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