Circuit and method for removing intelligent drive lamp turn-off residual light

Abstract

The circuit comprises a first residual light elimination unit, a second residual light elimination unit and a third residual light elimination unit, the first residual light elimination unit is an elimination assembly connected to an intelligent drive constant current output end in parallel, and the second residual light elimination unit is a capacitor connected to the intelligent drive constant current output end in parallel. The third residual light elimination unit comprises a first capacitor and a second capacitor which are respectively connected in parallel with the positive electrode and the negative electrode of the intelligent driving constant voltage output, and a grounding line for connecting the non-connecting ends of the first capacitor and the second capacitor to the ground, and the common mode inductor or the capacitor can be selectively connected in parallel for the intelligent driving of the constant current output. For intelligent driving with constant-voltage output, induced electricity is processed from different angles by adopting a mode of respectively connecting capacitors in parallel with positive and negative electrodes and grounding, the energy of the induced electricity can be effectively consumed and stored or the induced electricity is released, residual light is prevented from being generated in a lamp loop, the use experience of the lamp is greatly improved, and energy waste is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lamp lighting, and particularly relates to a circuit and method for removing the afterglow when the intelligent drive turns off the light. Background Art

[0002] In the modern lighting field, intelligent drive lamps are gradually replacing traditional lamps with their advantages of energy saving, dimming, intelligent control, etc., and are widely used in many scenarios such as home, commercial, and industrial. As the core component of the lamp, the intelligent drive is responsible for converting the power input into electrical energy suitable for the operation of the lamp's light-emitting elements (such as LEDs);

[0003] However, in the actual use of intelligent drive lamps, the problem of afterglow appears after turning off the light, which is widespread. This phenomenon not only affects the user experience, but also means a waste of energy. Currently, for the problem of afterglow when the intelligent drive turns off the light, some products consume the induced electricity by simply increasing the resistance, but this method has limited effect, cannot completely eliminate the afterglow, and will additionally increase the circuit loss and reduce the power efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit and method for removing the afterglow when the intelligent drive turns off the light, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A circuit for removing the afterglow when the intelligent drive turns off the light, comprising:

[0006] The first afterglow elimination unit, the first afterglow elimination unit is an elimination component connected in parallel to the constant current output end of the intelligent drive, and the elimination component is a common mode inductor;

[0007] The second afterglow elimination unit, the second afterglow elimination unit is a capacitor connected in parallel to the constant current output end of the intelligent drive;

[0008] The third afterglow elimination unit, the third afterglow elimination unit includes a first capacitor and a second capacitor respectively connected in parallel to the positive and negative poles of the constant voltage output of the intelligent drive, and a grounding line for connecting the non-connected ends of the first capacitor and the second capacitor to the ground.

[0009] Preferably, the inductance value of the common mode inductor is selected according to the output current, output frequency of the intelligent drive and the load characteristics of the LED lamp, and the rated current of the common mode inductor is greater than the maximum output current of the intelligent drive.

[0010] Preferably, the grounding resistance of the grounding line is less than a preset safe resistance value.

[0011] A method for removing the afterglow when the intelligent drive turns off the light includes the following steps:

[0012] S1. The common-mode inductor is used to consume the induced electrical energy, so that the induced electricity output to the lamp cannot form a current sufficient to light up the lamp, thereby eliminating the afterglow.

[0013] S2. When the intelligent driver is in the constant-current output mode, a capacitor is connected in parallel at its output terminal. The capacitor is used to store the charge of the induced electricity, avoid the formation of a continuous current of the induced electricity in the lamp circuit, and thus eliminate the afterglow.

[0014] S3. When the intelligent driver is in the constant-voltage output mode, a first capacitor and a second capacitor are respectively connected in parallel at the positive and negative terminals of its output terminal, and the non-connected ends of the first capacitor and the second capacitor are connected to the ground, so that no voltage difference is generated across the lamp due to the induced electricity, thereby eliminating the afterglow generated by the driving induced electricity.

[0015] Preferably, in step S2, when connecting the capacitor in parallel, first calculate the capacitance value of the capacitor according to the output voltage, current, equivalent resistance of the LED lamp and the duration of the induced electricity of the intelligent driver, and then select a capacitor with a suitable withstand voltage value.

[0016] Preferably, in step S3, the first capacitor and the second capacitor have the same parameter specifications.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) The present invention provides three methods for eliminating afterglow. For an intelligent driver with constant-current output, it is possible to choose to connect a common-mode inductor or a capacitor in parallel. For an intelligent driver with constant-voltage output, a method of connecting capacitors in parallel at the positive and negative terminals and grounding is adopted. The induced electricity is processed from different angles, and it can effectively consume, store the induced electrical energy or release the induced electricity, avoid the generation of afterglow in the lamp circuit, greatly improve the lamp usage experience, and reduce energy waste.

[0019] (2) Through two common intelligent driver output modes of constant current and constant voltage, no matter what type of intelligent driver lamp it is, a corresponding afterglow elimination solution can be found, which has wide applicability and can meet the needs of different users and scenarios for intelligent driver lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the circuit diagram of eliminating afterglow of constant-current output based on common-mode inductor of the present invention;

[0021] Figure 2 is the circuit diagram of eliminating afterglow of constant-current output based on capacitor of the present invention;

[0022] Figure 3 is the circuit diagram of eliminating afterglow of constant-voltage output based on capacitor grounding of the present invention.

[0023] In the figure: 1. DC-DC constant current module; 2. Common mode inductor; 3. LED lamp; 4. Ground; 5. First capacitor; 6. Second capacitor. Detailed implementation

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] The present invention provides a Figures 1-3 kind of circuit for removing the afterglow when the intelligent drive turns off the light as shown in

[0026] The first afterglow elimination unit, the first afterglow elimination unit is an elimination component connected in parallel to the constant current output end of the intelligent drive, and the elimination component is the common mode inductor 2;

[0027] The second afterglow elimination unit, the second afterglow elimination unit is a capacitor connected in parallel to the constant current output end of the intelligent drive;

[0028] The third afterglow elimination unit, the third afterglow elimination unit includes a first capacitor and a second capacitor respectively connected in parallel to the positive and negative poles of the constant voltage output of the intelligent drive, and a grounding line for connecting the non-connected ends of the first capacitor and the second capacitor to the ground 4.

[0029] The inductance value of the common mode inductor 2 is selected according to the output current, output frequency of the intelligent drive and the load characteristics of the LED lamp 3. The rated current of the common mode inductor 2 is greater than the maximum output current of the intelligent drive. The rated current being greater than the maximum output current of the intelligent drive is to ensure the safety and stability of the common mode inductor 2 in the circuit.

[0030] The grounding resistance of the grounding line is less than a preset safety resistance value. When the intelligent drive with constant voltage output turns off the light and generates induced electricity, if the grounding resistance is less than the preset safety value, it can ensure that the induced electricity can be smoothly released to the ground through the grounding line. Otherwise, the induced electricity may not be effectively released, resulting in the lamp housing or surrounding objects being charged, increasing the risk of electric shock to personnel.

[0031] A method for removing the afterglow when the intelligent drive turns off the light specifically includes the following steps:

[0032] S1. The common mode inductor 2 is used to consume the energy of the induced electricity, so that the induced electricity output to the lamp cannot form a current sufficient to light the lamp, thereby eliminating the afterglow;

[0033] S2. When the intelligent driver is in the constant current output mode, a capacitor is connected in parallel at its output terminal. The capacitor is used to store the charge of the induced electricity, prevent the induced electricity from forming a continuous current in the lamp circuit, and thus eliminate the afterglow.

[0034] S3. When the intelligent driver is in the constant voltage output mode, a first capacitor and a second capacitor are respectively connected in parallel to the positive and negative terminals of its output terminal, and the non-connected ends of the first capacitor and the second capacitor are connected to the ground 4, so that no voltage difference is generated at both ends of the lamp due to the induced electricity, thereby eliminating the afterglow generated by the driving induced electricity.

[0035] In step S2, when connecting the capacitor in parallel, first calculate the capacitance value of the capacitor according to the output voltage, current, equivalent resistance of the LED lamp 3 and the duration of the induced electricity of the intelligent driver, and then select a capacitor with a suitable withstand voltage value.

[0036] In step S3, the parameter specifications of the first capacitor and the second capacitor are the same, which helps to balance the circuit and stably eliminate the afterglow.

[0037] The method for removing the afterglow of the intelligent driver when turning off the light, as Figure 1 shown, based on the common mode inductor for eliminating the afterglow of the constant current output: In the intelligent driver circuit with constant current output, the DC-DC constant current module 1 performs chopping processing on the input DC voltage through the rapid conduction and cut-off of the internal power switch tube, and then passes through energy storage components such as inductors and capacitors for filtering and energy conversion to convert it into a DC voltage suitable for the load. When the light is turned off, there may be induced electricity in the circuit, and these induced electricity will form a current in the lamp circuit, causing the LED lamp 3 to have afterglow. The common mode inductor 2 is connected in parallel at the constant current output terminal of the intelligent driver. Its working principle is based on electromagnetic induction. When the common mode current generated by the induced electricity passes through the common mode inductor 2, due to the characteristic of the inductor to impede the change of current, the common mode inductor 2 will consume the energy of the induced electricity. According to the law of electromagnetic induction, the change of current will generate an induced electromotive force in the common mode inductor 2, and this induced electromotive force is opposite to the direction of the current change, thus impeding the change of current, so that the induced electricity output to the LED lamp 3 cannot form a current sufficient to light the lamp, and thus the afterglow is eliminated. In this process, "W-" is the negative terminal connection of the LED lamp 3. When the induced electricity tries to pass through the LED lamp 3 circuit, the common mode inductor 2 impedes the change of current, reduces the induced electricity current flowing to "W-", and prevents the LED lamp 3 from emitting light due to the induced electricity, and "Y-" is the sensor connected for monitoring current anomalies;

[0038] As Figure 2As shown, the capacitor-based constant current output afterglow elimination: Similarly, in the constant current output mode, the capacitor can also be used as an afterglow elimination component. When the intelligent drive circuit is in constant current output and the light is turned off, when the induced electricity is generated, the capacitor is connected in parallel to the constant current output terminal of the intelligent drive. The capacitor has the characteristic of storing charge, and it can quickly store the charge generated by the induced electricity, avoiding the formation of a continuous current in the lamp circuit. For example, when the induced electricity causes the voltage across the capacitor to rise, the capacitor starts to charge, converting the electrical energy of the induced electricity into the electric field energy of the capacitor and storing it, thus preventing the induced electricity from continuing to flow in the LED lamp 3 circuit. And "W-" is the negative terminal connection of the LED lamp 3. After the capacitor stores the induced electricity charge, the current flowing to "W-" is reduced, thereby preventing the LED lamp 3 from having an afterglow and achieving the purpose of eliminating the afterglow;

[0039] When selecting the capacitor, it is necessary to calculate the capacitance value of the capacitor according to the output voltage, current, equivalent resistance of the LED lamp 3, and the duration of the induced electricity of the intelligent drive, and then select a capacitor with a suitable withstand voltage value to ensure its effective operation;

[0040] As Figure 3 shown, the constant voltage output afterglow elimination based on capacitor grounding: For the intelligent drive with constant voltage output, a first capacitor 5 and a second capacitor 6 are respectively connected in parallel to the positive and negative terminals of its output (connected between the positive and negative constant voltage outputs and the ground 4), and the non-connected ends of these two capacitors are connected to the ground 4. When the drive generates induced electricity after the light is turned off, the first capacitor 5 and the second capacitor 6 will respectively store the induced electricity at the positive and negative poles. Since the other end of the capacitor is grounded, the induced electricity can be released to the ground through the grounding line, so that no voltage difference is generated across the LED lamp 3 due to the induced electricity. And "W-" is the negative terminal connection of the LED lamp 3. Under the combined action of the capacitor and the grounding line, the induced electricity is guided to the ground and no voltage difference sufficient to light the lamp is formed between "W-" and the positive pole of the LED lamp 3. Without these two capacitors grounded, the induced electricity accumulates at both ends of the lamp, resulting in a voltage difference and causing the LED lamp to have an afterglow. Thus, in this way, the afterglow after the intelligent drive with constant voltage output is turned off can be effectively eliminated. At the same time, the grounding resistance of the grounding line is less than the preset safety resistance value to ensure that the induced electricity can be smoothly released and guarantee electrical safety. And the parameter specifications of the first capacitor 5 and the second capacitor 6 are the same, which helps to balance the circuit and stably eliminate the afterglow.

[0041] Finally, it should be noted that: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit for removing the afterglow of intelligent drive to turn off the light, characterized in that, Including: A first afterglow elimination unit, where the first afterglow elimination unit is an elimination component connected in parallel to the intelligent drive constant current output terminal, and the elimination component is a common mode inductor; A second afterglow elimination unit, where the second afterglow elimination unit is a capacitor connected in parallel to the intelligent drive constant current output terminal; A third afterglow elimination unit, where the third afterglow elimination unit includes a first capacitor and a second capacitor respectively connected in parallel to the positive and negative poles of the intelligent drive constant voltage output, and a grounding line for connecting the non-connected ends of the first capacitor and the second capacitor to the ground.

2. The circuit for removing residual light when the light is turned off by intelligent driving according to claim 1, characterized in that: The inductance value of the common mode inductor is selected according to the output current, output frequency of the intelligent drive, and the load characteristics of the LED lamp.

3. The circuit for eliminating residual light when the light is turned off by intelligent driving according to claim 1, characterized in that: The grounding resistance of the grounding line is less than a preset safety resistance value.

4. A method for removing the afterglow of intelligent drive to turn off the light, characterized in that, The method is applied to the intelligent drive off-state afterglow removal circuit as described in any one of claims 1-3, and the method includes the following steps: S1. The common mode inductor is used to consume the induced electrical energy, so that the induced electricity output to the lamp cannot form a current sufficient to light the lamp, thereby eliminating the afterglow; S2. When the intelligent drive is in the constant current output mode, a capacitor is connected in parallel at its output terminal. The capacitor is used to store the charge of the induced electricity, avoiding the formation of a continuous current in the lamp circuit by the induced electricity, and thus eliminating the afterglow; S3. When the intelligent drive is in the constant voltage output mode, a first capacitor and a second capacitor are respectively connected in parallel to the positive and negative poles of its output terminal, and the non-connected ends of the first capacitor and the second capacitor are connected to the ground, so that no voltage difference is generated across the lamp due to the induced electricity, thereby eliminating the afterglow generated by the drive induced electricity.

5. A circuit for removing the afterglow of intelligent drive to turn off the light according to claim 4, characterized in that: In step S2, when connecting the capacitor in parallel, first calculate the capacitance value of the capacitor according to the output voltage, current of the intelligent drive, the equivalent resistance of the LED lamp, and the duration of the induced electricity, and then select a capacitor with a suitable withstand voltage value.

6. The circuit for removing residual light when the light is turned off by intelligent driving according to claim 4, characterized in that: In step S3, the parameter specifications of the first capacitor and the second capacitor are the same.

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