Lighting device with reverse voltage clamping release mechanism

Abstract

A lighting device with a reverse voltage clamping discharge mechanism includes a current limiting diode, a plurality of light emitting diodes, a rectifier, and a power input. The plurality of light emitting diodes are connected in series to form a series circuit, and the series circuit is connected in parallel with the current limiting diode. Each light emitting diode has a parasitic capacitance. The rectifier is connected to the plurality of light emitting diodes. The power input is connected to an external power source and the rectifier. The current limiting diode forms a discharge circuit, and a discharge current generated by discharging the parasitic capacitance of each light emitting diode is discharged through the discharge circuit.

Description

Technical Field

[0001] This invention relates to a lighting device, and more particularly to a lighting device having a reverse voltage clamping release mechanism. Background Technology

[0002] Existing lighting fixtures generally use metal casings for better heat dissipation, and these casings are grounded to meet safety regulations. Therefore, parasitic capacitance is formed between the light source board and the metal casing. Typically, users turn the lighting fixture on or off by switching either the live wire input or the neutral wire input. This creates an AC voltage difference between the light source board and the metal casing. Due to the characteristic of capacitors to pass AC but block DC, the parasitic capacitance continues to charge and discharge even after the lighting fixture is turned off. Therefore, the reverse voltage generated by the parasitic capacitance is applied to each light source on the light source board, making the lighting fixture prone to damage after a period of use.

[0003] Lighting fixture manufacturers have proposed several solutions to address these issues. The first solution is to add a Zener diode to the light source, but this increases cost and reduces luminous efficacy. The second solution is to use an isolated power supply, but this reduces power efficiency and increases cost. The third solution is to connect a resistor or capacitor in parallel with the light source, but this also increases cost and reduces luminous efficacy. The fourth solution is to optimize the circuit board layout to alter parasitic capacitance, but this requires more sophisticated manufacturing processes. Summary of the Invention

[0004] According to an embodiment of the present invention, a lighting device with a reverse voltage clamping release mechanism is provided, comprising a current-limiting diode, a plurality of light-emitting diodes (LEDs), a rectifier, and a power input terminal. The plurality of LEDs are connected in series to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode. Each LED has a parasitic capacitance. The rectifier is connected to the plurality of LEDs. The power input terminal is connected to an external power supply and the rectifier. The current-limiting diode forms a discharge circuit, and the discharge current generated by the discharge of the parasitic capacitance of each LED is released through the discharge circuit.

[0005] In one embodiment, the lighting device further includes a converter and an energy storage capacitor. A rectifier is connected to the converter. The converter is connected to the energy storage capacitor and a ground point. The energy storage capacitor is connected to the plurality of light-emitting diodes.

[0006] In one embodiment, the discharge current of each light-emitting diode enters the grounding point through a current-limiting diode, an energy storage capacitor, and a converter.

[0007] In one embodiment, each light-emitting diode has a junction capacitance connected in parallel with the light-emitting diode.

[0008] In one embodiment, the lighting device further includes a filter capacitor. The rectifier is connected to the converter via the filter capacitor.

[0009] In one embodiment, the converter is a boost converter, a buck converter, or a boost / buck converter.

[0010] In one embodiment, the power input terminal includes a live wire input terminal and a neutral wire input terminal.

[0011] In one embodiment, the rectifier is a full-wave rectifier.

[0012] In one embodiment, the rectifier is a half-wave rectifier.

[0013] In one embodiment, the external power source is AC mains power.

[0014] As described above, the lighting device with a reverse voltage clamping release mechanism according to embodiments of the present invention may have one or more of the following advantages:

[0015] (1) In one embodiment of the present invention, the lighting device includes a current-limiting diode, a plurality of light-emitting diodes (LEDs), a rectifier, and a power input terminal. The plurality of LEDs are connected in series to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode. Each LED has a parasitic capacitance. The rectifier is connected to the plurality of LEDs. The power input terminal is connected to an external power supply and the rectifier. The current-limiting diode forms a discharge circuit, and the discharge current generated by the discharge of the parasitic capacitance of each LED is released through the discharge circuit to realize a reverse voltage clamping release mechanism. Through the above-mentioned reverse voltage clamping release mechanism, the plurality of LEDs will not be damaged by reverse voltage, thereby improving the reliability of the lighting device.

[0016] (2) In one embodiment of the present invention, the current-limiting diode of the lighting device has a junction capacitance. When the lighting device is turned on, a momentary high voltage may be applied to the plurality of light-emitting diodes. At this time, the junction capacitance of the current-limiting diode can effectively achieve a buffering effect. The above mechanism can prevent the plurality of light-emitting diodes from being damaged by momentary high voltage. Therefore, the reliability of the lighting device can be further improved to meet the needs of practical applications.

[0017] (3) In one embodiment of the present invention, the circuit design and operation mechanism of the lighting device can effectively realize a special reverse voltage clamping release mechanism, thereby effectively improving the reliability of the lighting device. Furthermore, since the aforementioned reverse voltage clamping release mechanism is implemented through a discharge circuit, it does not reduce the luminous efficacy of the lighting device. Therefore, the lighting device can be more widely applied and more flexible in its use.

[0018] (4) In one embodiment of the present invention, the reliability of the lighting device is improved by the above-mentioned special reverse voltage clamping release mechanism, which eliminates the need for an isolated power supply and complex manufacturing processes. Therefore, the circuit loss of the lighting device can be effectively reduced, and the energy efficiency of the lighting device can be significantly improved, in line with future development trends.

[0019] (5) In one embodiment of the present invention, the reliability of the lighting device can be improved by the above-mentioned special reverse voltage clamping release mechanism, and the above-mentioned mechanism will not reduce the heat dissipation efficiency of the lighting device. Therefore, the lighting device can still achieve excellent heat dissipation effect to prevent the lighting device from malfunctioning or reducing its service life due to overheating.

[0020] (6) In one embodiment of the present invention, the circuit design of the lighting device is simple and can realize an effective reverse voltage clamping release mechanism to improve the reliability of the lighting device. Therefore, the practicality of the lighting device can be greatly improved to meet the needs of different applications. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of a lighting device with a reverse voltage clamping release mechanism according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram illustrating the operating state of a lighting device with a reverse voltage clamping release mechanism according to an embodiment of the present invention.

[0023] Figure 3 This is a circuit diagram of a lighting device with a reverse voltage clamping release mechanism, according to another embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Lighting device; Lt-Live wire input terminal; Nt-Neutral wire input terminal; RT-Rectifier; FC-Filter capacitor; CT-Converter; Lx-Inductor; SW-Switch; Dx-Diode; EC-Storage capacitor; D1-Current limiting diode; LED1~LENn-Light emitting diode; PS-External power supply; C1~Cn+1-Parasitic capacitance; Cd1~Cdn-Junction capacitance; GND-Ground point; A1-Arrow.

[0026] The following detailed description of the features and advantages of the present invention is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the content disclosed in this specification, the claims and drawings, anyone skilled in the art can easily understand the purpose and advantages of this creation. Detailed Implementation

[0027] The following description, with reference to the accompanying drawings, illustrates embodiments of a lighting device with a reverse voltage clamping release mechanism according to the present invention. For clarity and ease of illustration, the dimensions and proportions of the components in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is referred to as "connected" or "coupled" to another component, it may be directly connected or coupled to that other component or there may be an intervening component; when a component is referred to as "directly connected" or "directly coupled" to another component, there is no intervening component. Other terms used to describe the relationship between components or layers should be interpreted in the same manner. For ease of understanding, the same components in the following embodiments are indicated by the same symbols.

[0028] Please see Figure 1 This is a circuit diagram of a lighting device with a reverse voltage clamping release mechanism according to an embodiment of the present invention. As shown in the figure, the lighting device 1 includes a power input terminal, a rectifier RT, a filter capacitor FC, a converter CT, an energy storage capacitor EC, multiple current-limiting diodes D1, and multiple light-emitting diodes LED1~LENn. The lighting device 1 also includes a fuse and an electromagnetic compatibility filtering module, but these components are well known to those skilled in the art and are therefore not shown in the figure.

[0029] The power input terminal includes a live wire input terminal Lt and a neutral wire input terminal Nt. The power input terminal is connected to an external power supply PS and a rectifier RT. In one embodiment, the external power supply PS is AC mains power. In another embodiment, the external power supply PS is a generator or other AC power source.

[0030] The rectifier RT is connected to the filter capacitor FC and the ground point GND. In one embodiment, the rectifier RT is a full-wave rectifier. In another embodiment, the rectifier RT is a half-wave rectifier.

[0031] The filter capacitor FC is connected to the converter CT, which in turn is connected to ground GND and the energy storage capacitor EC. In this embodiment, the converter CT is a boost converter, which includes an inductor Lx, a switch SW, and a diode Dx; the circuit structure of the converter CT is well known to those skilled in the art and will not be described in detail here. In another embodiment, the converter CT is a buck converter or a buck-boost converter.

[0032] The energy storage capacitor EC is connected to the aforementioned multiple light-emitting diodes LED1~LENn.

[0033] The aforementioned LEDs LED1~LENn can be divided into multiple groups. For example, in this embodiment, LEDs LED1~LEN3 form one group. LEDs LED4~LEN6 form another group, and so on, with LEDs LEDn-2~LENn forming yet another group. The LEDs in each group are connected in series to form a series circuit, which is connected in parallel with a current-limiting diode D1. For example, LEDs LED1~LEN3 form a series circuit, which is connected in parallel with a current-limiting diode D1. Similarly, LEDs LEDn-2~LENn form a series circuit, which is connected in parallel with a current-limiting diode D1.

[0034] Each light-emitting diode (LED1~LENn) has parasitic capacitance and junction capacitance (the parasitic capacitance and junction capacitance are formed inside each light-emitting diode). Figure 1 The circuit is an equivalent circuit including these parasitic capacitances and junction capacitances. For example, LED1 has a parasitic capacitance C1 and a junction capacitance Cd1, with Cd1 connected in parallel with LED1. LED2 has a parasitic capacitance C2 and a junction capacitance Cd2, with Cd2 connected in parallel with LED2. LED3 has a parasitic capacitance C3 and a junction capacitance Cd3, with Cd3 connected in parallel with LED3. LEDn-2 has a parasitic capacitance Cn-2 and a junction capacitance Cdn-2, with Cdn-2 connected in parallel with LEDn-2. LEDn-1 has a parasitic capacitance Cn-1 and a junction capacitance Cdn-1, with Cdn-1 connected in parallel with LEDn-1. LEDn has a parasitic capacitance Cn and a junction capacitance Cdn, with Cdn connected in parallel with LEDn. The parasitic capacitance Cn+1 is the parasitic capacitance between the metal casing of the lighting device 1 and the light source board (the aforementioned plurality of light-emitting diodes LED1~LENn are disposed on the light source board).

[0035] When the user turns off the lighting device 1 via either the live wire input terminal Lt or the neutral wire input terminal Nt, an AC voltage difference is generated between the plurality of light-emitting diodes (LEDs) 1 to LENn and the metal casing of the lighting device 1. Therefore, the parasitic capacitances C1 to Cn of the LEDs 1 to LENn are continuously charged and discharged. This process generates a reverse voltage, which is applied to the LEDs 1 to LENn (for example, the voltage at the negative terminal of LED 1 is greater than the voltage at the positive terminal of LED 1). Each current-limiting diode D1 can form a discharge circuit, through which the discharge current generated by the parasitic capacitances C1 to Cn of each LED 1 to LENn can be released. For example, a current-limiting diode D1 connected in parallel with the series circuit formed by LEDs 1 to LEN3 can form a discharge circuit, through which the discharge current generated by the parasitic capacitances C1 to C3 of LEDs 1 to LEN3 can be released. Because the voltage drop formed after the current-limiting diode D1 is turned on is much smaller than the reverse voltage that LEDs LED1~LEN3 can withstand, the impact of the reverse voltage on the negative terminals of LEDs LED1~LEN3 can be reduced. Therefore, the current-limiting diode D1 can achieve a reverse voltage clamping and release mechanism to reduce the reverse voltage. In addition, the junction capacitance of the current-limiting diode D1 can stabilize the voltage difference across the series circuit formed by LEDs LED1~LEN3 when the lighting device 1 is turned on, thereby reducing the impact on LEDs LED1~LEN3. Similarly, the current-limiting diode D1 connected in parallel with the series circuit formed by LEDs LEDn-2~LENn can form a discharge circuit, and the discharge current generated by the parasitic capacitances Cn-2~Cn of LEDs LEDn-2~LENn can be released through this discharge circuit. The junction capacitances Cd1~Cdn of LEDs LED1~LENn can also reduce the reverse voltage to a certain extent.

[0036] As described above, each current-limiting diode D1 can form a discharge circuit, and the discharge current generated by the parasitic capacitances C1 to Cn of each LED1~LENn is released through the discharge circuit to achieve the reverse voltage clamping release mechanism. Through the above-mentioned reverse voltage clamping release mechanism, the above-mentioned LED1~LENn will not be damaged due to reverse voltage, thus improving the reliability of the lighting device 1.

[0037] In this embodiment, the current-limiting diode D1 of the lighting device 1 also has a junction capacitance. When the lighting device 1 is turned on, a momentary high voltage may be applied to the plurality of light-emitting diodes LED1~LENn. At this time, the junction capacitance of the current-limiting diode D1 can effectively achieve a buffering effect. The above mechanism can prevent the plurality of light-emitting diodes LED1~LENn from being damaged by momentary high voltage. Therefore, the reliability of the lighting device 1 can be further improved to meet the needs of practical applications.

[0038] Furthermore, in this embodiment, the circuit design and operation mechanism of the lighting device 1 can effectively implement a special reverse voltage clamping release mechanism, thereby effectively improving the reliability of the lighting device 1. Additionally, since the aforementioned reverse voltage clamping release mechanism is implemented through a discharge circuit, it does not reduce the luminous efficiency of the lighting device 1. Therefore, the lighting device 1 not only has a wider range of applications but also greater flexibility in use.

[0039] Furthermore, in this embodiment, the reliability of the lighting device 1 is improved through the aforementioned special reverse voltage clamping release mechanism, eliminating the need for an isolated power supply and complex manufacturing processes. Therefore, the circuit losses of the lighting device 1 can be effectively reduced, significantly improving its energy efficiency and aligning with future development trends.

[0040] Furthermore, in this embodiment, the reliability of the lighting device 1 can be improved through the aforementioned special reverse voltage clamping release mechanism, and this mechanism does not reduce the heat dissipation efficiency of the lighting device 1. Therefore, the lighting device 1 can still achieve excellent heat dissipation, preventing the lighting device 1 from malfunctioning due to overheating or reducing its service life.

[0041] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the lighting device with reverse voltage clamping release mechanism according to this embodiment should still be included within the patent scope of the invention.

[0042] Please see Figure 2 This is a schematic diagram illustrating the operation of a lighting device with a reverse voltage clamping release mechanism according to an embodiment of the present invention. As shown, the current-limiting diode D1 connected in parallel with the series circuit formed by LEDs LED1 to LEN3 forms a discharge loop, through which the discharge current generated by the parasitic capacitances C1 to C3 of LEDs LED1 to LEN3 is released. The discharge current of LEDs LED1 to LEN3 enters the ground point GND through the current-limiting diode D1, the energy storage capacitor EC, and the converter RT, as shown by arrow A1 in the figure. Similarly, the discharge loops formed by the other current-limiting diodes D1 also perform the same mechanism.

[0043] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the lighting device with reverse voltage clamping release mechanism according to this embodiment should still be included within the patent scope of the invention.

[0044] It is worth mentioning that the reverse voltage generated by the parasitic capacitance of existing lighting devices is applied to each light source on the light source board of the lighting device, so the lighting device is prone to damage after a period of use. Lighting device manufacturers have proposed several solutions to address this problem. The first solution is to add a Zener diode to the light source, but this increases cost and reduces luminous efficiency. The second solution is to use an isolated power supply, but this reduces power efficiency and increases cost. The third solution is to connect a resistor or capacitor in parallel with the light source, but this increases cost and reduces luminous efficiency. The fourth solution is to optimize the circuit board layout to change the parasitic capacitance, but this requires more advanced manufacturing processes. In contrast, according to an embodiment of the present invention, the lighting device includes a current-limiting diode, multiple light-emitting diodes (LEDs), a rectifier, and a power input terminal. The multiple LEDs are connected in series to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode. Each LED has parasitic capacitance. The rectifier is connected to the multiple LEDs. The power input terminal is connected to an external power supply and the rectifier. The current-limiting diode forms a discharge circuit, and the discharge current generated by the parasitic capacitance of each LED is released through the discharge circuit to achieve a reverse voltage clamping release mechanism. Through this reverse voltage clamping release mechanism, the multiple LEDs will not be damaged by reverse voltage, thus improving the reliability of the lighting device.

[0045] According to an embodiment of the present invention, the current-limiting diode of the lighting device has a junction capacitance. When the lighting device is turned on, a momentary high voltage may be applied to the plurality of light-emitting diodes. At this time, the junction capacitance of the current-limiting diode can effectively achieve a buffering effect. The above mechanism can prevent the plurality of light-emitting diodes from being damaged by momentary high voltage. Therefore, the reliability of the lighting device can be further improved to meet the needs of practical applications.

[0046] Furthermore, according to embodiments of the present invention, the circuit design and operation mechanism of the lighting device can effectively implement a special reverse voltage clamping release mechanism, thereby effectively improving the reliability of the lighting device. In addition, since the aforementioned reverse voltage clamping release mechanism is implemented through a discharge circuit, it does not reduce the luminous efficacy of the lighting device. Therefore, the lighting device can be applied more widely and used more flexibly.

[0047] Furthermore, according to embodiments of the present invention, the reliability of the lighting device is improved through the aforementioned special reverse voltage clamping release mechanism, eliminating the need for isolated power supplies and complex manufacturing processes. Therefore, circuit losses in the lighting device can be effectively reduced, significantly improving its energy efficiency and aligning with future development trends.

[0048] Furthermore, according to embodiments of the present invention, the reliability of the lighting device can be improved through the aforementioned special reverse voltage clamping release mechanism, and the mechanism does not reduce the heat dissipation efficiency of the lighting device. Therefore, the lighting device can still achieve excellent heat dissipation to prevent malfunctions or reduced lifespan due to overheating.

[0049] Furthermore, according to embodiments of the present invention, the circuit design of the lighting device is simple and can achieve an effective reverse voltage clamping release mechanism, thereby improving the reliability of the lighting device. Therefore, the practicality of the lighting device can be greatly improved to meet the needs of different applications. As can be seen from the above, the lighting device with a reverse voltage clamping release mechanism according to embodiments of the present invention can indeed achieve excellent technical results.

[0050] Please see Figure 3 The figure shows a circuit diagram of a lighting device with a reverse voltage clamping release mechanism according to another embodiment of the present invention. As shown, the lighting device 1 includes a power input terminal, a rectifier RT, a filter capacitor FC, a converter CT, an energy storage capacitor EC, multiple current-limiting diodes D1, and multiple light-emitting diodes LED1~LENn. The lighting device 1 also includes a fuse and an electromagnetic compatibility filter module, but these components are well known to those skilled in the art and are therefore not shown in the figure.

[0051] The power input terminals include a live wire input terminal (Lt) and a neutral wire input terminal (Nt). The power input terminals are connected to the external power supply (PS) and the rectifier (RT). The rectifier (RT) is connected to the filter capacitor (FC) and the ground point (GND). The filter capacitor (FC) is connected to the converter (CT), and the converter (CT) is connected to the ground point (GND) and the energy storage capacitor (EC). The energy storage capacitor (EC) is connected to the aforementioned LEDs (LED1~LENn).

[0052] The aforementioned LEDs LED1~LENn can be divided into multiple groups. Unlike the previous embodiment, in this embodiment, LEDs LED1~LEN4 form one group; LEDs LED5~LEN8 form another group; and so on, LEDs LEDn-3~LENn form yet another group. The LEDs in each group are connected in series to form a series circuit, which is then connected in parallel with a current-limiting diode D1. For example, LEDs LED1~LEN4 form a series circuit, which is connected in parallel with a current-limiting diode D1. Similarly, LEDs LEDn-3~LENn form a series circuit, which is connected in parallel with a current-limiting diode D1.

[0053] As can be seen from the above, the number of LEDs in each series circuit can be adjusted according to actual needs to optimize the reverse voltage clamping release mechanism and enable the lighting device 1 to achieve higher reliability.

[0054] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the lighting device with reverse voltage clamping release mechanism according to this embodiment should still be included within the patent scope of the invention.

[0055] In summary, according to embodiments of the present invention, the lighting device includes a current-limiting diode, a plurality of light-emitting diodes (LEDs), a rectifier, and a power input terminal. The plurality of LEDs are connected in series to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode. Each LED has parasitic capacitance. The rectifier is connected to the plurality of LEDs. The power input terminal is connected to an external power supply and the rectifier. The current-limiting diode forms a discharge circuit, and the discharge current generated by the discharge of the parasitic capacitance of each LED is released through the discharge circuit to achieve a reverse voltage clamping release mechanism. Through the above-described reverse voltage clamping release mechanism, the plurality of LEDs will not be damaged by reverse voltage, thus improving the reliability of the lighting device.

[0056] According to an embodiment of the present invention, the current-limiting diode of the lighting device has a junction capacitance. When the lighting device is turned on, a momentary high voltage may be applied to the plurality of light-emitting diodes. At this time, the junction capacitance of the current-limiting diode can effectively achieve a buffering effect. The above mechanism can prevent the plurality of light-emitting diodes from being damaged by momentary high voltage. Therefore, the reliability of the lighting device can be further improved to meet the needs of practical applications.

[0057] Furthermore, according to embodiments of the present invention, the circuit design and operation mechanism of the lighting device can effectively implement a special reverse voltage clamping release mechanism, thereby effectively improving the reliability of the lighting device. In addition, since the aforementioned reverse voltage clamping release mechanism is implemented through a discharge circuit, it does not reduce the luminous efficacy of the lighting device. Therefore, the lighting device can be applied more widely and used more flexibly.

[0058] Furthermore, according to embodiments of the present invention, the reliability of the lighting device is improved through the aforementioned special reverse voltage clamping release mechanism, eliminating the need for isolated power supplies and complex manufacturing processes. Therefore, circuit losses in the lighting device can be effectively reduced, significantly improving its energy efficiency and aligning with future development trends.

[0059] Furthermore, according to embodiments of the present invention, the reliability of the lighting device can be improved through the aforementioned special reverse voltage clamping release mechanism, and the mechanism does not reduce the heat dissipation efficiency of the lighting device. Therefore, the lighting device can still achieve excellent heat dissipation to prevent malfunctions or reduced lifespan due to overheating.

[0060] Furthermore, according to embodiments of the present invention, the circuit design of the lighting device is simple and can achieve an effective reverse voltage clamping release mechanism to improve the reliability of the lighting device. Therefore, the practicality of the lighting device can be greatly improved to meet the needs of different applications.

[0061] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A lighting device with a reverse voltage clamping release mechanism, characterized in that, include: Current-limiting diode; Multiple light-emitting diodes are connected in series to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode. Each light-emitting diode has a parasitic capacitance. A rectifier, connected to the plurality of light-emitting diodes; The power input terminal is connected to an external power supply and the rectifier. An energy storage capacitor is connected to the plurality of light-emitting diodes; as well as The converter is connected to the rectifier, the energy storage capacitor, and the grounding point; The current-limiting diode forms a discharge circuit. When the connection between the power input terminal and the external power supply is cut off, the parasitic capacitance of each of the light-emitting diodes is continuously charged and discharged. The discharge current generated by the discharge of the parasitic capacitance of each of the light-emitting diodes is released through the discharge circuit, so that the discharge current enters the ground point through the current-limiting diode, the energy storage capacitor and the converter. This makes the voltage drop formed by the conduction of the current-limiting diode less than the reverse voltage that the series circuit can withstand, so as to achieve the reverse voltage clamping release mechanism.

2. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The discharge current of each of the light-emitting diodes enters the grounding point through the current-limiting diode, the energy storage capacitor, and the converter.

3. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, Each of the light-emitting diodes has a junction capacitance, which is connected in parallel with the light-emitting diode.

4. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, It also includes a filter capacitor, through which the rectifier is connected to the converter.

5. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The converter is a boost converter, a buck converter, or a boost / buck converter.

6. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The power input terminal includes a live wire input terminal and a neutral wire input terminal.

7. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The rectifier is a full-wave rectifier.

8. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The rectifier is a half-wave rectifier.

9. The lighting device with a reverse voltage clamping release mechanism as described in claim 1, characterized in that, The external power source is AC mains power.

Images