Lighting device with reverse voltage clamp release mechanism

Abstract

To provide a lighting device with a reverse voltage clamp release mechanism.SOLUTION: A lighting device with reverse voltage clamp release mechanism includes a current limiting diode, a plurality of light-emitting diodes, a rectifier, and a power supply input terminal. 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 supply input terminal is connected to an external power supply and the rectifier. The current limiting diode forms a discharge loop, and a discharge current generated by discharging the parasitic capacitance of each light-emitting diode is released through the discharge loop.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lighting device, and more particularly to a lighting device with a reverse voltage clamp release mechanism. [Background technology]

[0002] Conventional lighting devices typically use metal housings to enhance heat dissipation and are grounded to meet safety requirements. This creates parasitic capacitance between the lighting device's light source board and the metal housing. Typically, users turn a lighting device on or off by disconnecting either the live or neutral input terminals via a switch. This creates an AC voltage difference between the light source panel and the metal housing. Because capacitors allow AC to pass and block DC, the parasitic capacitance continues to charge and discharge even after the lighting device 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 device vulnerable to damage after a certain period of use.

[0003] Lighting device manufacturers have also proposed several solutions to solve the above problems. The first solution is to add a Zener diode to the light source, but this solution increases costs and reduces light efficiency. The second solution is to use a separate power supply, but this solution decreases power efficiency and increases costs. The third solution is to connect a resistor or capacitor to the light source, but this solution increases costs and reduces light efficiency. The fourth solution is to optimize the layout of the circuit board to change the parasitic capacitance, but this solution requires a more advanced manufacturing process. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide a lighting device with a reverse voltage clamp release mechanism. [Means for solving the problem]

[0005] According to one embodiment of the present invention, there is provided a lighting device having a reverse voltage clamp release mechanism, including a current limiting diode, a plurality of light emitting diodes, a rectifier, and a power supply input terminal. 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 supply input terminal is connected to an external power supply and the rectifier. The current limiting diode forms a discharge loop, and a discharge current generated by discharging the parasitic capacitance of each light emitting diode is released through the discharge loop.

[0006] In one embodiment, the lighting device further comprises a converter and an energy storage capacitor, the rectifier is connected to the converter, the converter is connected to the energy storage capacitor and ground, and the energy storage capacitor is connected to the plurality of light emitting diodes.

[0007] In one embodiment, the discharge current of each light emitting diode passes through a current limiting diode, an energy storage capacitor, and a converter to ground.

[0008] In one embodiment, each light emitting diode has a junction capacitor connected in parallel with the light emitting diode.

[0009] In one embodiment, the lighting device further comprises a filter capacitor. The rectifier is connected to the converter via the filter capacitor.

[0010] In one embodiment, the converter is a boost converter, a buck converter, or a boost / buck converter.

[0011] In one embodiment, the power supply input terminals include a live input terminal and a neutral input terminal.

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

[0013] In one embodiment, the rectifier is a half-wave rectifier.

[0014] In one embodiment, the external power source is a mains power source. [Effects of the Invention]

[0015] Based on the above, a lighting device with a reverse voltage clamp release mechanism according to an embodiment of the present invention may have one or more of the following advantages. (1) In one embodiment of the present invention, a lighting device includes a current-limiting diode, a plurality of light-emitting diodes, a rectifier, and a power input terminal. 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 terminal is connected to an external power source and the rectifier. The current-limiting diode forms a discharge loop, and a discharge current generated by discharging the parasitic capacitance of each light-emitting diode is released through the discharge loop, thereby realizing a reverse voltage clamp release mechanism. The reverse voltage clamp release mechanism prevents the plurality of light-emitting diodes from being damaged by reverse voltage, improving the reliability of the lighting device. (2) In one embodiment of the present invention, the current limiting diode of the lighting device includes a junction capacitor. When the lighting device is turned on, a transient high voltage may be applied to the plurality of light-emitting diodes. In this case, the junction capacitor of the current limiting diode can effectively achieve a buffering effect. This mechanism can prevent the plurality of light-emitting diodes from being damaged by the momentary high voltage. Therefore, the reliability of the lighting device can be further improved and the requirements of practical applications can be met. (3) In one embodiment of the present invention, the circuit design and operating mechanism of the lighting device effectively realize a special reverse voltage clamp release mechanism, which effectively improves the reliability of the lighting device. Furthermore, because the reverse voltage clamp release mechanism is realized via a discharge circuit, the light efficiency of the lighting device is not reduced. This allows the lighting device to be applied in a wider range of applications and is more flexible in use. (4) In one embodiment of the present invention, the lighting device uses the special reverse voltage clamp release mechanism to improve the reliability of the lighting device, and does not require an independent power supply or complex manufacturing processes, thereby effectively reducing the circuit loss of the lighting device, significantly improving the energy efficiency of the lighting device, and meeting future development trends. (5) In one embodiment of the present invention, the reliability of the lighting device can be improved by the special reverse voltage clamp release mechanism, and the heat dissipation efficiency of the lighting device is not reduced by the mechanism, so that the lighting device can still achieve excellent heat dissipation effect and prevent the lighting device from breaking down or shortening its service life due to overheating. (6) In one embodiment of the present invention, the circuit design of the lighting device is simple, an effective reverse voltage clamp release mechanism can be realized, and the reliability of the lighting device can be improved, thereby greatly improving the practicality of the lighting device and meeting the requirements of various applications. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a circuit diagram of a lighting device equipped with a reverse voltage clamp release mechanism according to an embodiment of the present invention. [Figure 2] 1 is an explanatory diagram showing an operating state of a lighting device equipped with a reverse voltage clamp release mechanism according to an embodiment of the present invention. [Figure 3] FIG. 10 is a circuit diagram of a lighting device equipped with a reverse voltage clamp release mechanism according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings of this specification allow those skilled in the art to easily understand the objectives and advantages of the present invention.

[0018] Hereinafter, embodiments of a lighting device equipped with a reverse voltage clamp release mechanism of the present invention will be described with reference to the associated drawings. However, for clarity and ease of description in the drawings, the dimensions and proportions of each component in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is described as being "connected" or "coupled" to another component, this may be directly connected or coupled to the other component, or an intervening component may be present. When a component is described as being "directly connected" or "directly coupled" to another component, this does not mean that an intervening component is present, and other terms used to describe the relationship between components or layers should be interpreted similarly. For ease of understanding, the same components in the following embodiments will be denoted and described with the same reference numerals.

[0019] 1 is a circuit diagram of a lighting device equipped with a reverse voltage clamp release mechanism according to one embodiment of the present invention. As shown in the figure, lighting device 1 includes a power input terminal, a rectifier RT, a filter capacitor FC, a converter CT, an energy storage capacitor EC, a plurality of current-limiting diodes D1, and a plurality of light-emitting diodes LED1 through LEDn. Lighting device 1 further includes a fuse and an electromagnetic compatibility filter module, but these components are not shown in the figure because they are well known to those skilled in the art.

[0020] The power supply input terminals include a live input terminal Lt and a neutral input terminal Nt. The power supply input terminals are connected to an external power supply PS and a rectifier RT. In one embodiment, the external power supply PS is a utility power supply. In another embodiment, the external power supply PS is a generator or other AC power source.

[0021] The rectifier RT is connected to the filter capacitor FC and to ground GND. In one embodiment, the rectifier RT is a full-wave rectifier. In another embodiment, the rectifier RT is a half-wave rectifier.

[0022] The filter capacitor FC is connected to the converter CT, which is connected to a ground point GND and an energy storage capacitor EC. In this embodiment, the converter CT is a boost converter including 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. The energy storage capacitor EC is connected to a plurality of light-emitting diodes LED1 to LEDn.

[0023] The plurality of light-emitting diodes LED1 to LENn can be divided into a plurality of groups. For example, in this embodiment, the light-emitting diodes LED1 to LEN3 form one group. The light-emitting diodes LED4 to LEN6 form one group, and the light-emitting diodes LEDn-2 to LENn form one group. The light-emitting diodes in each group are connected in series to form a series circuit, and the series circuit is connected in parallel with a current-limiting diode D1. For example, the light-emitting diodes LED1 to LEN3 form a series circuit, and this series circuit is connected in parallel with the current-limiting diode D1. For example, the light-emitting diodes LEDn-2 to LENn form a series circuit, and this series circuit is connected in parallel with the current-limiting diode D1.

[0024] Each of the light-emitting diodes LED1 to LENn has a parasitic capacitance and a junction capacitor (the parasitic capacitance and junction capacitor are formed inside each light-emitting diode. The circuit in FIG. 1 is an equivalent circuit including these parasitic capacitances and junction capacitors). For example, the light-emitting diode LED1 has a parasitic capacitance C1 and a junction capacitor Cd1, and the junction capacitor Cd1 is connected in parallel with the light-emitting diode LED1. The light-emitting diode LED2 has a parasitic capacitance C2 and a junction capacitor Cd2, and the junction capacitor Cd2 is connected in parallel with the light-emitting diode LED2. The light-emitting diode LED3 has a parasitic capacitance C3 and a junction capacitor Cd3, and the junction capacitor Cd3 is connected in parallel with the light-emitting diode LED3. The light-emitting diode LEDn-2 has a parasitic capacitance Cn-2 and a junction capacitor Cdn-2, and the junction capacitor Cdn-2 is connected in parallel with the light-emitting diode LEDn-2. The light emitting diode LEDn-1 has a parasitic capacitance Cn-1 and a junction capacitor Cdn-1, and the junction capacitor Cdn-1 is connected in parallel with the light emitting diode LEDn-1. The light emitting diode LEDn has a parasitic capacitance Cn and a junction capacitor Cdn, and the junction capacitor Cdn is connected in parallel with the light emitting diode LEDn. The parasitic capacitance Cn1 is a parasitic capacitance between the metal housing of the lighting device 1 and a light source substrate (the plurality of light emitting diodes LED1 to LEDn are arranged on the light source substrate).

[0025] When a user disconnects either the live line input terminal Lt or the neutral line input terminal Nt to turn off the lighting device 1, an AC voltage difference occurs between the light-emitting diodes LED1 to LENn and the metal housing of the lighting device 1, causing the parasitic capacitances C1 to Cn of the light-emitting diodes LED1 to LENn to be continuously charged and discharged. The above process generates a reverse voltage that is applied to the light-emitting diodes LED1 to LENn (e.g., the voltage at the negative electrode of the light-emitting diode LED1 is greater than the voltage at the positive electrode of the light-emitting diode LED1). Each of the current-limiting diodes D1 can form a discharge loop, and the discharge current generated by the discharge of the parasitic capacitances C1 to Cn of the light-emitting diodes LED1 to LENn is released through this discharge loop. For example, the current-limiting diode D1 connected in parallel to the series circuit formed by the light-emitting diodes LED1 to LEN3 forms a discharge loop, and the discharge current generated in the parasitic capacitances C1 to C3 of the light-emitting diodes LED1 to LEN3 is released through this discharge loop. The voltage drop formed after the current-limiting diode D1 is turned on and the voltage drop formed by the current-limiting diode D1 are much smaller than the reverse voltage that the light-emitting diodes LED1 to LEN3 can withstand, thereby reducing the impact of reverse voltage on the negative electrodes of the light-emitting diodes LED1 to LEN3. Therefore, the current-limiting diode D1 realizes a reverse voltage clamp release mechanism and achieves the effect of reducing reverse voltage. The current-limiting diode D1 also has a junction capacitor that stabilizes the voltage difference across the series circuit formed by the light-emitting diodes LED1 to LEN3 when the lighting device 1 is turned on, thereby reducing the impact on the light-emitting diodes LED1 to LEN3. Similarly, the current-limiting diode D1 connected in parallel with the series circuit formed by the light-emitting diodes LEDn-2 to LENn forms a discharge loop, and the discharge current generated by the parasitic capacitances Cn-2 to Cn of the light-emitting diodes LEDn-2 to LENn is released through this discharge loop. The junction capacitors Cd1 to Cdn of the light-emitting diodes LED1 to LENn also have the effect of reducing reverse voltage to a certain extent.

[0026] As can be seen from the above, each current-limiting diode D1 can form a discharge loop, and the discharge current generated by discharging the parasitic capacitances C1 to Cn of each light-emitting diode LED1 to LENn is released through the discharge loop, thereby realizing a reverse voltage clamp release mechanism. The above reverse voltage clamp release mechanism prevents the light-emitting diodes LED1 to LENn from being damaged by reverse voltage, improving the reliability of the lighting device 1.

[0027] In this embodiment, the current-limiting diode D1 of the lighting device 1 also includes a junction capacitor. When the lighting device 1 is turned on, a high voltage may be momentarily applied to the plurality of light-emitting diodes LED1-LENn. At this time, the junction capacitor of the current-limiting diode D1 can effectively achieve a buffering effect. This mechanism can prevent the plurality of light-emitting diodes LED1-LENn from being damaged by the momentary high voltage. This further improves the reliability of the lighting device 1 and meets the requirements of practical applications.

[0028] Furthermore, in this embodiment, the circuit design and operating mechanism of the lighting device 1 can effectively realize a special reverse voltage clamp release mechanism, thereby effectively improving the reliability of the lighting device 1. Furthermore, because the reverse voltage clamp release mechanism is realized via a discharge circuit, the light efficiency of the lighting device 1 is not reduced. Therefore, the lighting device 1 can be applied in a wider range of applications and has greater flexibility in use.

[0029] Furthermore, in this embodiment, the lighting device 1 has the above-mentioned special reverse voltage clamp release mechanism, which improves reliability and does not require an independent power supply or complicated manufacturing processes, thereby effectively reducing the circuit loss of the lighting device 1, significantly improving the energy efficiency of the lighting device 1, and enabling it to keep up with future development trends.

[0030] Furthermore, in the present invention, the lighting device 1 can improve the reliability of the lighting device 1 by using the special reverse voltage clamp release mechanism, and the mechanism does not reduce the heat dissipation efficiency of the lighting device 1. Therefore, the lighting device 1 can achieve excellent heat dissipation effect, and can prevent the lighting device 1 from breaking down or the service life of the lighting device 1 from being reduced due to overheating.

[0031] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device equipped with the reverse voltage clamp release mechanism of this embodiment should still fall within the scope of protection of the present invention.

[0032] FIG. 2 is an explanatory diagram showing the operating state of a lighting device equipped with a reverse voltage clamp release mechanism according to one embodiment of the present invention. As shown in the figure, a current-limiting diode D1 in parallel with the series circuit formed by light-emitting diodes LED1 to LEN3 forms a discharge loop, and the discharge current generated in the parasitic capacitances C1 to C3 of light-emitting diodes LED1 to LEN3 is released through this discharge loop. As indicated by arrow A1 in the figure, the discharge current of light-emitting diodes LED1 to LEN3 passes through current-limiting diode D1, energy storage capacitor EC, and converter CT and enters ground GND. Similarly, the discharge loops formed by the other current-limiting diodes D1 also implement the same mechanism.

[0033] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device equipped with the reverse voltage clamp release mechanism of this embodiment should still fall within the scope of protection of the present invention.

[0034] In addition, in conventional lighting devices, a reverse voltage generated by parasitic capacitance is applied to each light source on the light source board of the lighting device, making the lighting device prone to damage after a certain period of use. Lighting device manufacturers have proposed several solutions to solve the above problems. The first solution is to add a Zener diode to the light source, but this solution increases costs and reduces light efficiency. The second solution is to use a separate power supply, but this solution reduces power efficiency and increases costs. The second solution is to connect a resistor or capacitor to the light source, but this solution increases costs and reduces light efficiency. The fourth solution is to modify the parasitic capacitance by optimizing the layout of the circuit board, but this solution requires a more advanced manufacturing process. In contrast, according to an embodiment of the present invention, a lighting device includes a current-limiting diode, multiple light-emitting diodes, a rectifier, and a power input terminal. The 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 is connected to the multiple light-emitting diodes. The power input terminal is connected to an external power source and the rectifier. The current limiting diode forms a discharge loop through which the discharge current generated by the discharge of the parasitic capacitance of each light emitting diode is released, thereby realizing a reverse voltage clamp release mechanism, which prevents the light emitting diodes from being damaged by reverse voltage and improves the reliability of the lighting device.

[0035] According to an embodiment of the present invention, the current limiting diode of the lighting device includes a junction capacitor. When the lighting device is turned on, a transient high voltage may be applied to the plurality of light-emitting diodes. In this case, the junction capacitor of the current limiting diode can effectively achieve a buffering effect. This mechanism can prevent the plurality of light-emitting diodes from being damaged by the momentary high voltage. Therefore, the reliability of the lighting device can be further improved and the requirements of practical applications can be met.

[0036] Furthermore, according to the embodiment of the present invention, a special reverse voltage clamp release mechanism can be effectively realized through the circuit design and operating mechanism of the lighting device, thereby effectively improving the reliability of the lighting device. Furthermore, since the reverse voltage clamp release mechanism is realized through a discharge circuit, the light efficiency of the lighting device is not reduced. Therefore, the lighting device can be applied in a wider range of applications and has greater flexibility in use.

[0037] Furthermore, according to the embodiment of the present invention, the lighting device improves the reliability of the lighting device by using the special reverse voltage clamp release mechanism, does not require an independent power supply, and does not require complex manufacturing processes, thereby effectively reducing the circuit loss of the lighting device, greatly improving the energy efficiency of the lighting device, and meeting future development trends.

[0038] Furthermore, according to the embodiment of the present invention, the reliability of the lighting device can be improved by the special reverse voltage clamp release mechanism, and the heat dissipation efficiency of the lighting device is not reduced by the mechanism, so that the lighting device can still achieve excellent heat dissipation effect and prevent the lighting device from breaking down or shortening its service life due to overheating.

[0039] Furthermore, according to the embodiment of the present invention, the circuit design of the lighting device is simple, an effective reverse voltage clamp release mechanism can be realized, and the reliability of the lighting device can be improved. Therefore, the practicality of the lighting device is greatly improved and the requirements of various applications can be met. From the above, it can be seen that the lighting device equipped with the reverse voltage clamp release mechanism according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0040] 3 is a circuit diagram of a lighting device equipped with a reverse voltage clamp release mechanism according to another embodiment of the present invention. As shown in the figure, lighting device 1 includes a power input terminal, a rectifier RT, a filter capacitor FC, a converter CT, an energy storage capacitor EC, a plurality of current-limiting diodes D1, and a plurality of light-emitting diodes LED1 through LEDn. Lighting device 1 further includes a fuse and an electromagnetic compatibility filter module, but these components are not shown in the figure because they are well known to those skilled in the art.

[0041] The power supply input terminals include a live line input terminal Lt and a neutral line input terminal Nt. The power supply input terminals are connected to an external power supply PS and a rectifier RT. The rectifier RT is connected to a filter capacitor FC and a ground point GND. The filter capacitor FC is connected to a converter CT, which is connected to the ground point GND and an energy storage capacitor EC. The energy storage capacitor EC is connected to a plurality of light emitting diodes LED1 to LEDn.

[0042] The plurality of light-emitting diodes LED1 to LENn can be divided into a plurality of groups. Unlike the previous embodiment, in this embodiment, the light-emitting diodes LED1 to LEN4 form one group, the light-emitting diodes LED5 to LEN8 form one group, and the light-emitting diodes LEDn-3 to LENn form one group. The light-emitting diodes in each group are connected in series to each other to form a series circuit, and the series circuit is connected in parallel with the current-limiting diode D1. For example, the light-emitting diodes LED1 to LEN4 form a series circuit, and this series circuit is connected in parallel with the current-limiting diode D1. For example, the light-emitting diodes LEDn-3 to LENn form a series circuit, and this series circuit is connected in parallel with the current-limiting diode D1.

[0043] From the above, it can be seen that the number of light emitting diodes in each series circuit can be adjusted according to actual needs, and the reverse voltage clamp release mechanism can be optimized so that the lighting device 1 can achieve higher reliability.

[0044] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the lighting device equipped with the reverse voltage clamp release mechanism of this embodiment should still fall within the scope of protection of the present invention.

[0045] In summary, according to an embodiment of the present invention, a lighting device includes a current-limiting diode, a plurality of light-emitting diodes, a rectifier, and a power input terminal. 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 terminal is connected to an external power source and the rectifier. The current-limiting diode forms a discharge loop, and a discharge current generated by discharging the parasitic capacitance of each light-emitting diode is released through the discharge loop, thereby realizing a reverse voltage clamp release mechanism. The reverse voltage clamp release mechanism prevents the plurality of light-emitting diodes from being damaged by reverse voltage, improving the reliability of the lighting device.

[0046] According to an embodiment of the present invention, the current limiting diode of the lighting device includes a junction capacitor. When the lighting device is turned on, a transient high voltage may be applied to the plurality of light-emitting diodes. In this case, the junction capacitor of the current limiting diode can effectively achieve a buffering effect. This mechanism can prevent the plurality of light-emitting diodes from being damaged by the momentary high voltage. Therefore, the reliability of the lighting device can be further improved and the requirements of practical applications can be met.

[0047] Furthermore, according to the embodiment of the present invention, a special reverse voltage clamp release mechanism can be effectively realized through the circuit design and operating mechanism of the lighting device, thereby effectively improving the reliability of the lighting device. Furthermore, since the reverse voltage clamp release mechanism is realized through a discharge circuit, the light efficiency of the lighting device is not reduced. Therefore, the lighting device can be applied in a wider range of applications and has greater flexibility in use.

[0048] Furthermore, according to the embodiment of the present invention, the lighting device improves the reliability of the lighting device by using the special reverse voltage clamp release mechanism, does not require an independent power supply, and does not require complex manufacturing processes, thereby effectively reducing the circuit loss of the lighting device, greatly improving the energy efficiency of the lighting device, and meeting future development trends.

[0049] Furthermore, according to the embodiment of the present invention, the reliability of the lighting device can be improved by the special reverse voltage clamp release mechanism, and the heat dissipation efficiency of the lighting device is not reduced by the mechanism, so that the lighting device can still achieve excellent heat dissipation effect and prevent the lighting device from breaking down or shortening its service life due to overheating.

[0050] Furthermore, the embodiment of the present invention simplifies the circuit design of the lighting device, realizes an effective reverse voltage clamp release mechanism, and improves the reliability of the lighting device, thereby greatly improving the practicality of the lighting device and meeting the requirements of different applications.

[0051] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, or the direct or indirect application of the above technical solutions to other related technical fields, are all within the scope of the claims of the present invention. [Explanation of symbols]

[0052] 1. Lighting equipment Lt Live line input terminal Nt Neutral wire input terminal RT rectifier FC filter capacitor CT converter Lx inductance SW switch DX Diode EC Energy Storage Capacitor D1 Current limiting diode LED1~LENn Light Emitting Diodes PS external power supply C1~Cn1 Parasitic capacitance Cd1~Cdn junction capacitors GND grounding point A1 Arrow

Claims

1. a current limiting diode; a plurality of light emitting diodes each having a parasitic capacitance and connected in series to form a series circuit, the series circuit being connected in parallel with the current limiting diode; a rectifier connected to the plurality of light emitting diodes; a power supply input terminal connected to an external power supply and the rectifier; Including, The current limiting diode forms a discharge loop, and a discharge current generated by discharging the parasitic capacitance of each of the light-emitting diodes is released through the discharge loop.

2. 2. The lighting device with a reverse voltage clamp release mechanism of claim 1, further comprising a converter and an energy storage capacitor, wherein the rectifier is connected to the converter, the converter is connected to the energy storage capacitor and to ground, and the energy storage capacitor is connected to the plurality of light-emitting diodes.

3. 3. The lighting device with a reverse voltage clamp release mechanism according to claim 2, wherein the discharge current of each of the light-emitting diodes flows into the ground via the current limiting diode, the energy storage capacitor, and the converter.

4. 3. The lighting device with a reverse voltage clamp release mechanism according to claim 2, wherein each of the light emitting diodes has a junction capacitor, the junction capacitor being connected in parallel with the light emitting diode.

5. 3. The lighting device with a reverse voltage clamp release mechanism according to claim 2, further comprising a filter capacitor, the rectifier being connected to the converter via the filter capacitor.

6. 3. The lighting device equipped with a reverse voltage clamp release mechanism according to claim 2, wherein the converter is a step-up converter, a step-down converter, or a step-up / step-down converter.

7. 2. The lighting device equipped with a reverse voltage clamp release mechanism according to claim 1, wherein the power supply input terminals include a live line input terminal and a neutral line input terminal.

8. 2. The lighting device equipped with a reverse voltage clamp release mechanism according to claim 1, wherein the rectifier is a full-wave rectifier.

9. 2. The lighting device equipped with a reverse voltage clamp release mechanism according to claim 1, wherein the rectifier is a half-wave rectifier.

10. 2. The lighting device equipped with a reverse voltage clamp release mechanism according to claim 1, wherein the external power source is a commercial power source.

Images