Lamp control circuit, circuit board and electronic equipment

Abstract

The utility model discloses a lamp control circuit, a control method and a computer readable storage medium, and relates to the technical field of electronic circuits. When the lamp needs to be turned on, the lamp and the live wire are conducted through the first intelligent control module, so that a loop is formed among the zero line, the lamp and the live wire, the mains supply can supply power to the lamp, and the lamp is turned on. When the lamp needs to be turned off, the lamp and the live wire are cut off through the first intelligent control module, so that the mains supply cannot supply power to the lamp, the lamp is turned off, the first switch unit is turned on, the mains supply voltage rectifies alternating current of the mains supply into direct current through the rectification effect of the first rectifier bridge, and the direct current is input to the first switch unit; and at the moment, the lamp is equivalently short-circuited by the first rectifier bridge and the first switch unit, so that the voltage at the two ends of the lamp is close to zero, and the condition that the lamp is slightly bright or flashes can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuits, and particularly relates to a lamp control circuit, a circuit board and an electronic device. BACKGROUND

[0002] In related technologies, in a single-hot circuit, a smart control module is generally directly connected in series in a hot line of the single-hot circuit, so that there is no zero line for the smart control module, which causes a power supply problem for the smart control module, and only the leakage current when the lamp is turned off or a capacitor added on the circuit can be used to realize small-current power supply. However, due to different types and different powers of different lamps on the market, the lamps are prone to be slightly bright or flicker when turned off. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a lamp control circuit, a circuit board and an electronic device, which can supply power to a first smart control module by using the mains voltage of a hot line, and can avoid the problem of slightly bright or flicker of the lamp when turned off.

[0004] The lamp control circuit according to the first aspect of the present application comprises:

[0005] A lamp, a first end of the lamp being configured to be connected to a zero line;

[0006] A conduction module, a second end of the lamp being connected to the conduction module, and the conduction module being configured to be connected to a hot line;

[0007] A first switch unit;

[0008] A first rectifier bridge, a first alternating current input end of the first rectifier bridge being configured to be connected to the zero line, and a second alternating current input end of the first rectifier bridge being connected to the second end of the lamp; a positive output end of the first rectifier bridge being connected to a negative output end of the first rectifier bridge through the first switch unit, and the negative output end of the first rectifier bridge being grounded;

[0009] A first smart control module, a voltage input end of the first smart control module being connected to the second end of the lamp, and the first smart control module being connected to the conduction module, and the first smart control module being configured to drive the conduction module to conduct or cut off between the lamp and the hot line.

[0010] According to the lamp control circuit provided in the embodiments of the present application, at least the following beneficial effects are achieved: when the lamp is to be turned on, the first intelligent control module is used to make the lamp and the live wire conductive, so that a loop is formed between the neutral wire, the lamp and the live wire, and the power supply can supply power to the lamp, and the lamp is turned on. Since the voltage input end of the first intelligent control module is connected to the second end of the lamp, the power supply can supply power to the first intelligent control module. When the lamp is to be turned off, the first intelligent control module is used to make the lamp and the live wire cut off, so that the power supply cannot supply power to the lamp, and the lamp is turned off. When the lamp is turned off, the first switch unit is made conductive, so that the alternating current of the power supply is rectified into direct current by the first rectifier bridge, and the direct current is input to the first switch unit. At this time, the lamp is equivalent to being short-circuited by the first rectifier bridge and the first switch unit, and thus the voltage across the lamp is close to 0, and the situation of the lamp being slightly bright or flickering can be avoided. Since the voltage input end of the first intelligent control module is connected to the second end of the lamp, the power supply can supply power to the first intelligent control module. In this way, the first intelligent control module can be supplied with power when the lamp is in the off state, and the situation of the lamp being slightly bright or flickering can be avoided.

[0011] According to some embodiments of the first aspect of the present application, the lamp control circuit further comprises a second intelligent control module, a first resistor and a second resistor. The voltage input end of the second intelligent control module is connected to the positive output end of the first rectifier bridge. One end of the first resistor is connected to the first end of the lamp, and the other end is connected to the second end of the lamp through the second resistor. The first voltage detection end of the second intelligent control module is connected between the first resistor and the second resistor. The second intelligent control module is connected to the first switch unit, and the second intelligent control module is used to make the first switch unit conductive or cut off.

[0012] According to some embodiments of the first aspect of the present application, the lamp control circuit further comprises a third resistor. The first switch unit is connected to the negative output end of the first rectifier bridge through the third resistor. The second voltage detection end of the second intelligent control module is connected between the first switch unit and the third resistor.

[0013] According to some embodiments of the first aspect of the present application, the conductive module comprises a second switch unit and a second rectifier bridge. The first alternating current input end of the second rectifier bridge is connected to the second end of the lamp. The second alternating current input end of the second rectifier bridge is used to be connected to the live wire. The positive output end of the second rectifier bridge is connected to the ground through the second switch unit. The negative output end of the second rectifier bridge is connected to the ground. The first intelligent control module is connected to the second switch unit, and the first intelligent control module is used to make the second switch unit conductive or cut off.

[0014] According to some embodiments of the first aspect of the present application, the first switch unit is a first field effect transistor, the drain of the first field effect transistor is connected with the positive output terminal of the first rectifier bridge, the gate of the first field effect transistor is connected with the second intelligent control module, and the source of the first field effect transistor is connected with the third resistor.

[0015] According to some embodiments of the first aspect of the present application, the second switch unit is a second field effect transistor, the drain of the second field effect transistor is connected with the positive output terminal of the second rectifier bridge, the gate of the second field effect transistor is connected with the first intelligent control module, and the source of the second field effect transistor is grounded.

[0016] According to some embodiments of the first aspect of the present application, the lamp control circuit further comprises a first diode and a first capacitor, the voltage input terminal of the first intelligent control module is connected with the positive output terminal of the second rectifier bridge through the first diode, and the voltage input terminal of the first intelligent control module and the output terminal of the first diode are grounded through the first capacitor.

[0017] According to some embodiments of the first aspect of the present application, the conduction module comprises a third field effect transistor, a fourth field effect transistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, the drain of the third field effect transistor is connected with the second terminal of the lamp, the gate of the third field effect transistor is connected with the first intelligent control module through the sixth resistor, and the gate of the third field effect transistor is grounded through the fourth resistor; the source of the third field effect transistor and the source of the fourth field effect transistor are grounded.

[0018] The drain of the fourth field effect transistor is connected with a live wire, the gate of the fourth field effect transistor is connected with the first intelligent control module through the seventh resistor, and the gate of the fourth field effect transistor is grounded through the fifth resistor.

[0019] The second aspect of the present application provides a circuit board comprising the lamp control circuit according to any one of the first aspect of the present application.

[0020] The third aspect of the present application provides an electronic device comprising the circuit board according to the second aspect of the present application.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0023] Figure 1 FIG. 1 is a circuit structure schematic diagram of a lamp control circuit according to an embodiment of the present application.

[0024] Figure 2 Signal waveform schematic diagram of the lamp control circuit of the embodiment of the present application;

[0025] Figure 3 Circuit structure schematic diagram of the conduction module of another embodiment of the present application.

[0026] Reference signs:

[0027] First rectifier bridge 100; second rectifier bridge 200; second intelligent control module 300; first intelligent control module 400. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation to the present application.

[0029] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0030] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If it is described as first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0031] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0032] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0033] The first aspect embodiment of the present application provides a lamp control circuit. Referring to Figure 1 , Figure 1 is a schematic diagram of the circuit structure of the lamp control circuit of the present application. The lamp control circuit comprises a lamp, a conduction module, a first switch unit, a first rectifier bridge 100 and a first intelligent control module 400. The first end of the lamp is used for connecting with the neutral line; the second end of the lamp is connected with the conduction module, and the conduction module is used for connecting with the live line; the first alternating current input end of the first rectifier bridge 100 is used for connecting with the neutral line, and the second alternating current input end of the first rectifier bridge 100 is connected with the second end of the lamp; the output positive pole of the first rectifier bridge 100 is connected with the output negative pole of the first rectifier bridge 100 through the first switch unit, and the output negative pole of the first rectifier bridge 100 is grounded; the voltage input end of the first intelligent control module 400 is connected with the second end of the lamp, the first intelligent control module 400 is connected with the conduction module, and the first intelligent control module 400 is used for driving the conduction module to make the lamp conductive or cut off between the live line.

[0034] According to the lamp control circuit, the following beneficial effects are achieved: when the lamp is to be turned on, the first intelligent control module 400 is used to make the lamp and the live wire conductive, so that a loop is formed between the neutral wire, the lamp and the live wire, and the power supply can supply power to the lamp, and the lamp is turned on. The voltage input end of the first intelligent control module 400 is connected to the second end of the lamp, so that the power supply can supply power to the first intelligent control module 400. When the lamp is to be turned off, the first intelligent control module 400 is used to make the lamp and the live wire cut off, so that the power supply cannot supply power to the lamp, and the lamp is turned off. When the lamp is turned off, the first switch unit is made to conduct, so that the alternating current of the power supply is rectified into direct current by the first rectifier bridge 100, and the direct current is input to the first switch unit. At this time, the lamp is equivalent to being short-circuited by the first rectifier bridge 100 and the first switch unit, so the voltage between the two ends of the lamp is close to 0, and the situation of the lamp being slightly bright or flickering can be avoided. The voltage input end of the first intelligent control module 400 is connected to the second end of the lamp, so that the power supply can supply power to the first intelligent control module 400. In this way, the first intelligent control module 400 can be supplied with power when the lamp is in the off state, and the situation of the lamp being slightly bright or flickering can be avoided.

[0035] It should be noted that when the lamp is turned on, the first switch unit needs to be cut off to avoid the lamp being short-circuited.

[0036] In an embodiment, the first intelligent control module 400 is provided with a touch button (not shown in the figure). When the touch button is triggered by the user to be turned on, the first intelligent control module 400 drives the conduction module to make the lamp and the live wire conductive. When the touch button is triggered by the user to be turned off, the first intelligent control module 400 drives the conduction module to make the lamp and the live wire cut off.

[0037] It should be noted that, with reference to Figure 1 The first rectifier bridge 100 is composed of a diode D1, a diode D2, a diode D3 and a diode D4. The output end of the diode D1 and the input end of the diode D2 form the first alternating current input end of the first rectifier bridge 100, and the output end of the diode D3 and the input end of the diode D4 form the second alternating current input end of the first rectifier bridge 100. The output end of the diode D2 and the output end of the diode D4 form the positive output end of the first rectifier bridge 100, and the input end of the diode D1 and the input end of the diode D2 form the negative output end of the first rectifier bridge 100.

[0038] In an embodiment, with reference to Figure 1The lamp control circuit further comprises a second intelligent control module 300, a first resistor R3 and a second resistor R2. The voltage input end of the second intelligent control module 300 is connected to the positive output end of the first rectifier bridge 100. One end of the first resistor R3 is connected to the first end of the lamp, and the other end of the first resistor R3 is connected to the second end of the lamp through the second resistor R2. The first voltage detection end of the second intelligent control module 300 is connected between the first resistor R3 and the second resistor R2. The second intelligent control module 300 is connected to the first switch unit, and the second intelligent control module 300 is configured to turn on or turn off the first switch unit.

[0039] It should be noted that the first intelligent control module 400 and the second intelligent control module 300 are modules capable of realizing intelligent control. The specific structure of the first intelligent control module 400 and the second intelligent control module 300 is not limited in the present application. For example, the first intelligent control module 400 and the second intelligent control module 300 can be a single-chip microcomputer or a microprocessor.

[0040] In an embodiment, the lamp control circuit further comprises a third resistor R1. The first switch unit is connected to the negative output end of the first rectifier bridge 100 through the third resistor R1. The second voltage detection end of the second intelligent control module 300 is connected between the first switch unit and the third resistor R1.

[0041] Specifically, Figure 1 In the embodiment, the signal AC_SIGNAL is the voltage of the first voltage detection end. The second intelligent control module 300 detects the voltage between the first resistor R3 and the second resistor R2 through the first voltage detection end. When it is detected that the voltage of the first voltage detection end is greater than a first preset threshold value and the voltage of the second voltage detection end is greater than a second preset threshold value, it indicates that the lamp is in a light-on state. Therefore, the second intelligent control module 300 turns off the first switch unit. When it is detected that the voltage of the first voltage detection end is less than the first preset threshold value and the voltage of the second voltage detection end is less than the second preset threshold value, it indicates that the lamp is in a light-off state. Therefore, the second intelligent control module 300 turns on the first switch unit. In this way, the second intelligent control module 300 can determine whether the lamp is in a light-on state or a light-off state through the first voltage detection end. It should be noted that the first preset threshold value is not limited in the present application. The first preset threshold value can be set according to actual conditions by those skilled in the art.

[0042] Specifically, Figure 1 In the embodiment, the signal CURRENT_SIGNAL is the voltage of the second voltage detection end. When the first switch unit is turned on, if it is detected that the voltage of the second voltage detection end is greater than the second preset threshold value, it indicates that an abnormality occurs in the circuit. Therefore, the second intelligent control module 300 turns off the first switch unit, thereby protecting the circuit.

[0043] In an embodiment, the conducting module comprises a second switch unit and a second rectifier bridge 200, a first alternating current input end of the second rectifier bridge 200 is connected with the second end of the lamp, a second alternating current input end of the second rectifier bridge 200 is used for being connected with the firewire, the output end positive pole of the second rectifier bridge 200 is grounded through the second switch unit; the output end negative pole of the second rectifier bridge 200 is grounded; the first intelligent control module 400 is connected with the second switch unit, and the first intelligent control module 400 is used for making the second switch unit conduct or cut off.

[0044] Specifically, the second rectifier bridge 200 is composed of a diode D5, a diode D6, a diode D7 and a diode D8, the first alternating current input end of the second rectifier bridge 200 is between the output end of the diode D5 and the input end of the diode D6; the second alternating current input end of the second rectifier bridge 200 is between the output end of the diode D7 and the input end of the diode D8; the output end positive pole of the second rectifier bridge 200 is between the output end of the diode D6 and the output end of the diode D8; the output end negative pole of the second rectifier bridge 200 is between the input end of the diode D5 and the input end of the diode D7. And the voltage input end of the first intelligent control module 400 is connected with the second end of the lamp through the second rectifier bridge 200, and specifically connected as follows: the voltage input end of the first intelligent control module 400 is connected with the output end positive pole of the second rectifier bridge 200. Referring to Figure 1 , the voltage input end of the first intelligent control module 400 is connected with the power end.

[0045] When the lamp needs to be turned on, the first intelligent control module 400 makes the second switch unit conduct, so that the zero line, the lamp and the firewire are conducted, thus the lamp can be turned on, and at this time, part of the alternating current of the commercial power is converted into direct current through the rectification of the second rectifier bridge 200, which is used for supplying power to the first intelligent control module 400. When the lamp needs to be turned off, the first intelligent control module 400 makes the second switch unit cut off, so that the zero line, the lamp and the firewire are cut off, and the lamp cannot be turned on, at this time, the first switch unit is made to conduct, so that the lamp is short-circuited, and the commercial power can still supply power to the first intelligent control module 400 under the action of the first switch unit, and the alternating current of the commercial power is converted into direct current through the rectification of the second rectifier bridge 200, which is used for supplying power to the first intelligent control module 400.

[0046] In an embodiment, referring to Figure 1 , the first switch unit is a first field effect tube, the drain of the first field effect tube is connected with the output end positive pole of the first rectifier bridge 100, the gate of the first field effect tube is connected with the second intelligent control module 300, and the source of the first field effect tube is connected with the third resistor R1. When the second intelligent control module 300 sends a high-level signal to the gate of the first field effect tube, the first field effect tube conducts. When the second intelligent control module 300 stops sending the high-level signal to the gate of the first field effect tube, the first field effect tube cuts off.

[0047] In one embodiment, referring to Figure 1 The second switching unit is a second field-effect transistor (FET). The drain of the second FET is connected to the positive output terminal of the second rectifier bridge 200, and the gate of the second FET is connected to the first intelligent control module 400. The source of the second FET is grounded. When the first intelligent control module 400 sends a high-level signal to the gate of the second FET, the second FET turns on. When the first intelligent control module 400 stops sending a high-level signal to the gate of the second FET, the second FET turns off.

[0048] In one embodiment, referring to Figure 1 The lamp control circuit further includes a first diode and a first capacitor. The voltage input terminal of the first intelligent control module 400 is connected to the positive electrode of the output terminal of the second rectifier bridge 200 through the first diode, and the voltage input terminal of the first intelligent control module 400 and the output terminal of the first diode are grounded through the first capacitor. Figure 1 In FIG, the first diode is diode D9, and the first capacitor is capacitor C1. The first capacitor is used to store voltage, and the first diode enables the first capacitor to transfer the stored voltage to power the first intelligent control module 400. The lamp is L1, the first field effect transistor is Q3, and the second field effect transistor is Q1.

[0049] In one embodiment, referring to Figure 1 The lamp control circuit also includes a second diode and a second capacitor. The voltage input end of the second intelligent control module 300 is connected to the positive pole of the output end of the first rectifier bridge 100 through the second diode, and the voltage input end of the second intelligent control module 300 and the output end of the second diode are grounded through the second capacitor. Figure 1 In FIG, the second diode is diode D10 and the second capacitor is capacitor C2. The second capacitor is used to store voltage, and the second diode enables the second capacitor to supply the stored voltage to the second intelligent control module 300.

[0050] In one embodiment, the input end of the second diode is connected to the positive electrode of the output end of the first rectifier bridge 100 through the resistor R4. The output end of the second diode is grounded through the TVS diode. Figure 1 The TVS diode is diode D11. Specifically, the input end of the TVS diode is grounded, and the output end of the TVS diode is connected to the output end of the second diode.

[0051] In one embodiment, referring to Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of the conduction module of another embodiment of the present application. Figure 3In the specific embodiment, the conduction module comprises a third field effect transistor, a fourth field effect transistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, the drain of the third field effect transistor is connected with the second end of the lamp, the gate of the third field effect transistor is connected with the first intelligent control module through the sixth resistor, and the gate of the third field effect transistor is grounded through the fourth resistor; the source of the third field effect transistor and the source of the fourth field effect transistor are grounded; the drain of the fourth field effect transistor is connected with the live wire, the gate of the fourth field effect transistor is connected with the first intelligent control module through the seventh resistor, and the gate of the fourth field effect transistor is grounded through the fifth resistor.

[0052] In the specific embodiment, the third field effect transistor is Q8, the fourth field effect transistor is Q9, the fourth resistor is R14, the fifth resistor is R12, the sixth resistor is R15, and the seventh resistor is R17. When the ON_OFF signal is a high-level signal, the third field effect transistor and the fourth field effect transistor are turned on; when the ON_OFF signal is a low-level signal, the third field effect transistor and the fourth field effect transistor are turned off.

[0053] One embodiment of the present application provides a control method of a lamp control circuit, applied to the lamp control circuit of the first aspect of the present application. The control method comprises the following steps:

[0054] In step S210, in the case where the first intelligent control module obtains a light-on instruction, in response to detecting a zero-crossing signal of the mains voltage, the first intelligent control module is controlled to output a high-level signal to the gate of the second field effect transistor, so that the lamp is in a light-on state, and the second intelligent control module is controlled to output a low-level signal to the gate of the first field effect transistor;

[0055] In step S220, after a first time length, the first intelligent control module is controlled to output a low-level signal to the gate of the second field effect transistor, at this time, the second intelligent control module detects that the lamp is in a light-off state through the first voltage detection end and the second voltage detection end, the second intelligent control module is controlled to output a high-level signal to the gate of the first field effect transistor until the next zero-crossing signal of the mains voltage is detected; wherein the first time length is less than 0.5x, and x is the period of the mains voltage;

[0056] In step S230, in the case where the first intelligent control module obtains a light-off instruction, in response to detecting a zero-crossing signal of the mains voltage, the first intelligent control module is controlled to output a low-level signal to the gate of the second field effect transistor, so that the lamp is in a light-off state, at this time, the second intelligent control module detects that the lamp is in a light-off state through the first voltage detection end and the second voltage detection end, and the second intelligent control module is controlled to output a high-level signal to the gate of the first field effect transistor.

[0057] In an embodiment, the first intelligent control module 400 and the second intelligent control module 300 are respectively provided with a zero-crossing detection unit, which is configured to detect a waveform of the mains power and generate a zero-crossing signal when the waveform of the mains power is detected to cross zero.

[0058] Specifically, referring to Figure 2 , Figure 2 is a signal waveform diagram of the lamp control circuit according to an embodiment of the present application. The first intelligent control module 400 is provided with a touch button (not shown in the figure). When the touch button is triggered to be turned on by a user, an ON command is generated, so that the first intelligent control module 400 outputs a high signal to the gate of the second field effect tube, i.e., the ON OFF signal in Figure 2 , so that the second field effect tube is turned on to form a loop between the zero line, the lamp, and the live line, so that the mains power can supply power to the lamp, and the lamp is turned on, and the lamp is in the ON state. Since the voltage input end of the first intelligent control module 400 is connected to the second end of the lamp, the mains power can supply power to the first intelligent control module 400. At this time, the second field effect tube is in an off state.

[0059] Specifically, when the touch button is triggered to be turned off by a user, an OFF command is generated. At this time, the first intelligent control module 400 stops outputting a high signal to the gate of the second field effect tube, so that the lamp is in the OFF state.

[0060] Specifically, the second intelligent control module 300 determines whether the lamp is in the OFF state by detecting the voltage at the first voltage detection end and the voltage at the second voltage detection end, i.e., the signal AC SIGNAL. When the signal AC SIGNAL is less than a first preset threshold and the signal CURRENT SIGNAL is less than a second preset threshold, it indicates that the lamp is in the OFF state. When the zero-crossing signal is detected, the second intelligent control module 300 is controlled to output a high signal to the gate of the first field effect tube, i.e., the EN B signal, so that the first field effect tube is turned on, so that the mains voltage is rectified by the first rectifier bridge 100 to direct current, and the direct current is input to the first switching unit. At this time, the lamp is equivalent to being short-circuited by the first rectifier bridge 100 and the first switching unit, so the voltage across the lamp is close to 0, which can avoid the situation that the lamp is slightly bright or flashes, and since the voltage input end of the first intelligent control module 400 is connected to the second end of the lamp, the mains power can supply power to the first intelligent control module 400. It should be noted that, in Figure 2 , the EN B signal is slightly delayed because the second intelligent control module 300 is controlled after the zero-crossing signal is detected.

[0061] Specifically, when the signal AC_SIGNAL is greater than a first preset threshold and the signal CURRENT_SIGNAL is greater than a second preset threshold, it indicates that the lamp is in the on state. When the zero-crossing signal is detected, the second intelligent control module 300 is first controlled to stop outputting a high-level signal to the first field effect tube to avoid short-circuiting of the lamp. Then, after a first time period, the first intelligent control module 400 is controlled to stop outputting a high-level signal to the gate of the second field effect tube, and the second intelligent control module 300 is controlled to output a high-level signal to the gate of the first field effect tube. At this time, since the second field effect tube is cut off and the first field effect tube is turned on, the lamp is equivalent to being short-circuited by the first rectifier bridge 100 and the first switching unit during the first time period and the period from the next zero-crossing signal. Therefore, the power supply can supply power to the first intelligent control module 400, and since the first time period is less than x, x is the period of the power supply voltage, the period of 50 Hz alternating current is 20 ms, and the period of direct current after rectification is 10 ms. Therefore, the total time period from the first time period to the period from the next zero-crossing signal is less than 10 ms. Moreover, since the lamp has a capacitor, the total time period from the first time period to the period from the next zero-crossing signal is short, and the capacitor inside the lamp can supply power to the lamp. Therefore, the lamp can still emit light normally during the period from the first time period to the period from the next zero-crossing signal.

[0062] In an embodiment, the first intelligent control module 400 further includes an AC-DC unit, a first intelligent control unit, a wireless communication unit, and a display control unit. The first intelligent control unit is a master control chip, which can be a single-chip microcomputer or a microprocessor, for example, and is configured to output an ON_OFF signal based on the zero-crossing signal. The wireless communication unit can be a wifi unit or a Bluetooth unit, and is configured to realize communication connection with an external device. The display control unit is a combination of a display screen and a button and an LED indicator, and is configured to display the state of the lamp and control the lamp. The AC-DC unit is configured to convert high-voltage alternating current into low-voltage direct current for circuit operation.

[0063] In an embodiment, the second intelligent control module 300 further includes a second intelligent control unit, which is a master control chip, for example, a microprocessor, and is configured to output an EN_B signal based on the zero-crossing signal.

[0064] In an embodiment, the first switching unit and the second switching unit can also be other power switches such as thyristors or IGBT tubes.

[0065] The second aspect embodiment of the present application provides a circuit board, which includes the lamp control circuit of the first aspect embodiment.

[0066] Since the circuit board comprises the lamp control circuit of the first aspect, the corresponding content of the lamp control circuit in the first aspect embodiment can be applied to the circuit board of the second aspect, and has the same implementation principle and technical effects. To avoid redundant description of the description, it will not be described in detail here.

[0067] The third aspect embodiment of the present application provides an electronic device comprising the circuit board of the second aspect embodiment.

[0068] Since the electronic device comprises the circuit board of the second aspect, the corresponding content of the lamp control circuit in the first aspect embodiment can be applied to the electronic device of the third aspect, and has the same implementation principle and technical effects. To avoid redundant description of the description, it will not be described in detail here.

[0069] The embodiments described in the embodiments of the present application are for more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0070] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than the figures shown, or combine certain steps, or different steps.

[0071] The device embodiments described above are only schematic, and the units illustrated as separate components can or can not be physically separated, that is, they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0072] Those skilled in the art can understand that all or some steps in the above disclosed method, the function modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.

[0073] The terms "first", "second", "third", "fourth", and the like in the description and in the claims of this application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of orderly or chronological mundane operation, reverse order operation, based on circuitry availability, based on stated preference or the like, and that "default" or other orderings are thus permissible. Further, the terms "comprise", "comprising", "include", "including", and the like, are specifically intended to be open-ended. That is, references to individual steps and the like do not suhstantially exclude the presence of two or more of a recited step or its integral sub-steps or additional steps whether or not readily ascertainable from the description or the like. Further, the words "a" or "an", as used herein in the disclosure and elsewhere, are used indiscriminately and are to be interpreted in the same way, i.e. as meaning "one or more".

[0074] It should be understood that, in this application, "at least one" means one or more, "multiple" means two or more. "And / or" is used to describe the relationship between associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are only A, only B, and A and B at the same time. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0075] In several embodiments provided in the present application, it should be understood that the disclosed system and method can be implemented in other ways. For example, the above-described system embodiments are only illustrative, for example, the division of the above-mentioned units is only a logical functional division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other form.

[0076] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment according to actual needs.

[0077] In addition, each of the functional units in the embodiments of the present application can be integrated in one processing unit, or each unit can exist alone physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0078] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially, or the part that contributes to the prior art, or all or a part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes multiple instructions used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various other media that can store programs.

[0079] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and are not intended to limit the scope of the embodiments of the present application. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the embodiments of the present application.

Claims

1. A lamp control circuit, characterized in that: include: a lamp, wherein a first end of the lamp is used to be connected to a neutral wire; A conduction module, the second end of the lamp is connected to the conduction module, and the conduction module is used to connect to the live wire; a first switching unit; a first rectifier bridge, wherein a first AC input terminal of the first rectifier bridge is connected to a neutral line, and a second AC input terminal of the first rectifier bridge is connected to the second terminal of the lamp; a positive electrode of an output terminal of the first rectifier bridge is connected to a negative electrode of an output terminal of the first rectifier bridge via the first switch unit, and the negative electrode of the output terminal of the first rectifier bridge is grounded; A first intelligent control module, wherein the voltage input end of the first intelligent control module is connected to the second end of the lamp, the first intelligent control module is connected to the conduction module, and the first intelligent control module is used to drive the conduction module to connect or cut off the lamp and the live wire.

2. The lamp control circuit according to claim 1, characterized in that: It also includes a second intelligent control module, a first resistor, and a second resistor. The voltage input end of the second intelligent control module is connected to the positive pole of the output end of the first rectifier bridge; one end of the first resistor is connected to the first end of the lamp, and the other end is connected to the second end of the lamp through the second resistor; the first voltage detection end of the second intelligent control module is connected between the first resistor and the second resistor; the second intelligent control module is connected to the first switch unit, and the second intelligent control module is used to turn on or off the first switch unit.

3. The lamp control circuit according to claim 2, characterized in that: It also includes a third resistor, the first switch unit is connected to the negative output terminal of the first rectifier bridge through the third resistor, and the second voltage detection terminal of the second intelligent control module is connected between the first switch unit and the third resistor.

4. The lamp control circuit according to claim 3, characterized in that: The conduction module includes a second switch unit and a second rectifier bridge. The first AC input end of the second rectifier bridge is connected to the second end of the lamp, and the second AC input end of the second rectifier bridge is used to be connected to the live wire. The positive pole of the output end of the second rectifier bridge is grounded through the second switch unit; the negative pole of the output end of the second rectifier bridge is grounded; the first intelligent control module is connected to the second switch unit, and the first intelligent control module is used to turn on or off the second switch unit.

5. The lamp control circuit according to claim 4, characterized in that: The first switching unit is a first field effect transistor, the drain of the first field effect transistor is connected to the positive output terminal of the first rectifier bridge, the gate of the first field effect transistor is connected to the second intelligent control module, and the source of the first field effect transistor is connected to the third resistor.

6. The lamp control circuit according to claim 5, characterized in that: The second switch unit is a second field effect transistor, the drain of the second field effect transistor is connected to the positive output terminal of the second rectifier bridge, the gate of the second field effect transistor is connected to the first intelligent control module; the source of the second field effect transistor is grounded.

7. The lamp control circuit according to claim 6, characterized in that: It also includes a first diode and a first capacitor. The voltage input end of the first intelligent control module is connected to the positive pole of the output end of the second rectifier bridge through the first diode, and the voltage input end of the first intelligent control module and the output end of the first diode are grounded through the first capacitor.

8. The lamp control circuit according to claim 1, characterized in that: The conduction module includes a third field-effect transistor, a fourth field-effect transistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor. The drain of the third field-effect transistor is connected to the second end of the lamp, the gate of the third field-effect transistor is connected to the first intelligent control module via the sixth resistor, and the gate of the third field-effect transistor is grounded via the fourth resistor; the source of the third field-effect transistor and the source of the fourth field-effect transistor are grounded. The drain of the fourth field effect tube is connected to the live wire, the gate of the fourth field effect tube is connected to the first intelligent control module through the seventh resistor, and the gate of the fourth field effect tube is grounded through the fifth resistor.

9. A circuit board, characterized in that: The lamp control circuit comprises the lamp control circuit according to any one of claims 1 to 8.

10. An electronic device, characterized in that: Comprising the circuit board as claimed in claim 9.

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