Control circuit of double-light-source light supplement lamp module

Abstract

The utility model discloses a control circuit for a double-light-source light supplement lamp module. The control circuit comprises a light supplement control module and an interface module, the light supplementing control module comprises a control chip U1, an RC module, a first voltage dividing module, a second voltage dividing module, a first light supplementing module and a second light supplementing module. The control chip U1 is provided with a first pin to an eighth pin; one end of the RC module is connected with a working voltage end of the interface module, and the other end of the RC module is connected with a first pin of the control chip U1; one end of the first voltage dividing module is connected with a W-EN end of the interface module, and the other end of the first voltage dividing module is connected with a second pin of the control chip U1; one end of the second voltage dividing module is connected with the IR-EN end of the interface module, and the other end of the second voltage dividing module is connected with a third pin of the control chip U1; one end of the first light supplementing module is connected with an eighth pin of the control chip U1; the other end is connected with the working voltage end of the interface module; one end of the second light supplementing module is connected with the seventh pin of the control chip U1, and the other end of the second light supplementing module is connected with the working voltage end of the interface module.

Description

Technical Field

[0001] This utility model relates to the technical field of dual-source fill light modules, specifically to a control circuit for a dual-source fill light module. Background Technology

[0002] A supplementary lighting module is a component of a surveillance camera, used to provide additional light to the camera and ensure clear images. Supplementary lighting modules typically include infrared and white light groups, which can be switched to meet different lighting needs.

[0003] Currently, the control circuits for supplementary lighting modules in surveillance cameras typically employ two methods. The first is a transistor control circuit. This type of circuit is susceptible to the LED's current-voltage characteristics and temperature coefficient, leading to significant differences in light radiation intensity between modules under the same circuit control. The second method uses a buck constant current control circuit. This circuit employs continuous inductor current mode constant current control, effectively ensuring consistent light radiation intensity between modules under the same circuit control. However, this type of control circuit has a larger number of components and higher cost.

[0004] Both types of supplementary lighting module control circuits consist of two sets of control circuits: one set controls the infrared lamp group, and the other controls the white light lamp group. This results in a large number of discrete components in the supplementary lighting control circuit, as well as a complex circuit structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, a control circuit for a dual-source fill light module is provided.

[0006] To achieve the above objectives, this utility model provides a dual-source fill light module control circuit, including a fill light control module and an interface module; the interface module has a W-EN terminal, an IR-EN terminal, an ADC terminal, and a working voltage terminal; the fill light control module includes a control chip U1, an RC module, a first voltage divider module, a second voltage divider module, a first fill light module, and a second fill light module; the control chip U1 has a first pin to an eighth pin; one end of the RC module is connected to the working voltage terminal of the interface module, and the other end is connected to the first pin of the control chip U1; one end of the first voltage divider module is connected to the W-EN terminal of the interface module, and the other end is connected to the second pin of the control chip U1; one end of the second voltage divider module is connected to the IR-EN terminal of the interface module, and the other end is connected to the third pin of the control chip U1; one end of the first fill light module is connected to the eighth pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module; one end of the second fill light module is connected to the seventh pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module.

[0007] According to one embodiment of the present invention, the light sensing module further includes a voltage input terminal and a control signal terminal; the voltage input terminal is connected to the working voltage terminal of the interface module; and the control signal terminal is connected to the ADC terminal of the interface module.

[0008] According to one embodiment of the present invention, the RC module includes a filtering unit and a first current limiting unit. One end of the first current limiting unit is connected to the first pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module. One end of the filtering unit is connected to the working voltage terminal of the interface module and the first current limiting unit, and the other end is grounded.

[0009] According to one embodiment of the present invention, the first voltage divider module includes a first voltage divider unit and a first pull-down unit; one end of the first voltage divider is connected to the second pin of the control chip U1, and the other end is connected to the W-EN terminal of the interface module; one end of the first pull-down unit is connected to the first voltage divider unit and the second pin of the control chip U1 respectively, and the other end is grounded.

[0010] According to one embodiment of the present invention, the first supplementary lighting module includes a plurality of first light-emitting units, which are connected in parallel with each other, and the negative terminals of the plurality of first light-emitting units are connected to the eighth pin of the control chip U1; the positive terminals of the plurality of first light-emitting units are connected to one end of the second supplementary lighting module and the working voltage terminal of the interface module.

[0011] According to one embodiment of the present invention, the second supplementary lighting module includes multiple sets of second light-emitting units connected in parallel. One end of each set of second light-emitting units is connected to the seventh pin of the control chip U1, and the other end of each set of second light-emitting units is connected to the working voltage terminal of the first supplementary lighting module and the interface module. Each second light-emitting unit includes multiple light-emitting elements, and the multiple light-emitting elements are connected in series with each other.

[0012] According to one embodiment of this utility model, the photosensitive module includes a photoresistor CDS, a transistor Q1, resistors R13, R12, R10, R9, R4, R11, and a capacitor C2; one end of the photoresistor CDS is connected to the working voltage terminal of the interface module, and the other end is connected to resistor R13; the other end of resistor R13 is connected to the base of transistor Q1, one end of resistor R12, and capacitor C2; one end of resistor R12 is connected to the base of transistor Q1, resistor R13, capacitor C2, and resistor R10, and the other end is grounded; one end of capacitor C2 is connected to the base of transistor Q1, resistor R12, and capacitor C10. C2 and resistor R2 are connected together, with the other end grounded; the emitter of transistor Q1 is grounded; one end of resistor R9 is connected to the ADC terminal of the interface module, and the other end is connected to the collector of transistor Q1, resistor R10, resistor R4, and resistor R11 respectively; the two ends of resistor R10 are connected to the base and collector of transistor Q1 respectively; one end of resistor R4 is connected to the working voltage terminal of the photoresistor CDS and the interface module respectively, and the other end is connected in series with resistor R11; one end of resistor R11 is connected to resistor R4 and the collector of transistor Q1 respectively, and the other end is grounded; the connection point of resistor R4 and resistor R11 is connected to the base of transistor Q1.

[0013] According to one embodiment of the present invention, the first supplementary lighting module includes two first light-emitting units and a first shunt module; the first shunt module includes three first shunt units connected in parallel; one end of the three first shunt units is connected to the sixth pin of the control chip U1, and the other end of the three first shunt units is connected in series with the two first light-emitting units; one end of one first light-emitting unit is connected to the three first shunt units respectively, and its other end is connected to another first light-emitting unit; one end of the other first light-emitting unit is connected to the working voltage terminal of the interface module.

[0014] According to one embodiment of the present invention, the second supplementary lighting module includes a second shunt module and two second light-emitting units; the second shunt module includes four second shunt units connected in parallel; one end of the four second shunt units is connected to the seventh pin of the control chip U1, and the other end of the four second shunt units is connected in series with the two second light-emitting units; one end of one second light-emitting unit is connected to the four second shunt units respectively, and its other end is connected in series with another second light-emitting unit, and the other second light-emitting unit is connected to the working voltage terminal of the interface module.

[0015] According to one embodiment of this utility model, the photosensitive module includes a resistor R21, a photoresistor CDS1, a transistor Q2, resistors R22, R23, R24, R25, and R26, and a Zener diode D9; one end of resistor R21 is connected to the operating voltage terminal of the interface module, and the other end is connected to one end of the photoresistor CDS1, the other end of which is connected to both the transistor Q2 and resistor R22; one end of resistor R22 is connected to both the photoresistor CDS1 and the base of the transistor Q2. One end of resistor R23 is connected to resistor R21, photoresistor CDS1, and Zener diode D9, and the other end is connected to the emitter of transistor Q2 and resistor R24. One end of resistor R24 ​​is connected to resistor R23 and the emitter of transistor Q2, and the other end is connected to ground. One end of resistor R25 is connected to the collector of transistor Q2, and the other end is connected in series with one end of resistor R26. The other end of resistor R26 is connected to ground. The node between resistors R25 and R26 is connected to the ADC terminal of the interface module.

[0016] The beneficial effects of this invention are that the control chip adopts a dual-channel LED linear constant current driver chip, which converts the input working voltage into a constant current output, providing a stable current for the first and second supplementary lighting modules, enabling them to emit light stably. By using the control chip U1 to simultaneously control the first and second supplementary lighting modules, the number of circuit components is effectively reduced, simplifying the circuit structure of the dual-source supplementary lighting module control circuit, thereby reducing manufacturing costs. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is the control circuit diagram of the dual-source fill light module in Example 1;

[0019] Figure 2 This is a circuit diagram of the light sensing module in Embodiment 1;

[0020] Figure 3 This is the control circuit diagram of the dual-source fill light module in Embodiment 2;

[0021] Figure 4 This is a circuit diagram of the light sensing module in Embodiment 2.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Supplemental lighting control module; 2-Interface module; 3-Photosensitive module; 31-Voltage input terminal; 32-Control signal terminal; 11-RC module; 111-Filtering unit; 112-First current limiting unit; 12-First voltage divider module; 121-First voltage divider unit; 122-First pull-down unit; 13-Second voltage divider module; 131-Second voltage divider unit; 132-Second pull-down unit; 14-First supplemental lighting module; 141-First light-emitting unit; 142-First current shunt module; 1421-First current shunt unit; 15-Second supplemental lighting module; 151-Second light-emitting unit; 152-Second current shunt module; 1521-Second current shunt unit; 1511-Light-emitting element; 16-Third voltage divider unit; 17-Fourth voltage divider unit. Detailed Implementation

[0024] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0025] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] Example 1

[0027] Please refer to Figure 1 , Figure 1This example illustrates the control circuit for a dual-source fill light module. The embodiment provides a dual-source fill light module control circuit, comprising a fill light control module 1 and an interface module 2. The interface module 2 connects the dual-source fill light module control circuit to an external MCU chip for signal connection and transmission. The interface module 2 has a W-EN terminal, an IR-EN terminal, an ADC terminal, and a working voltage terminal. The fill light control module 1 includes a control chip U1, an RC module 11, a first voltage divider module 1212, a second voltage divider module 13, a first fill light module 14, and a second fill light module 15. The control chip U1 has pins 1 through 8. One end of the RC module 11 is connected to the working voltage terminal of the interface module 2, and the other end is connected to the first pin of the control chip U1. One end of the first voltage divider module 1212 is connected to the W-EN terminal of the interface module 2, and the other end is connected to the second pin of the control chip U1. One end of the second voltage divider module 13 is connected to the IR-EN terminal of the interface module 2, and the other end is connected to the third pin of the control chip U1. One end of the first supplementary lighting module 14 is connected to the eighth pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module 2 and the second supplementary lighting module 15. One end of the second supplementary lighting module 15 is connected to the seventh pin of the control chip U1, and the other end is connected to the first supplementary lighting module 14.

[0028] In this embodiment, the control chip U1 uses a dual-channel LED linear constant current driver chip, which receives the working voltage provided by the working voltage terminal of the interface module 2 and converts the working voltage into a constant current output. The control chip U1 has pins one through eight. Pin one is VDD, pin two is CN1, pin three is CN2, pin four is GND, pin five is CS2, pin six is ​​CS1, pin seven is LED2, and pin eight is LED1. In this embodiment, the interface module 2 includes interface J1, which is used to connect to an external MCU chip. Interface J1 has pins 1-7, where pin 1 is W-EN; pin 2 is IR-EN; pin 3 is ADC; pin 4 is GND, used for grounding; and pin 5 is the working voltage terminal. In this example, pin 5 of interface J1 is used to connect to a 5V power supply. Pins 6 and 7 are grounded. During actual circuit operation, the 5V working voltage at pin 5 is filtered by the RC module 11 and then input to the control chip U1 to power it. The first voltage divider module 1212 is connected to the second pin of the control chip U1. The second pin of the control chip U1 is connected to the W-EN terminal of the interface J1. One end of the first voltage divider module 1212 is connected to the W-EN terminal of the interface J1, and the other end is connected to the second pin of the control chip U1. One end of the second voltage divider module 13 is connected to the IR-EN terminal of the interface J1, and the other end is connected to the third pin of the control chip U1. One end of the first supplementary lighting module 14 is connected to the eighth pin of the control chip U1, and the other end is connected to a 5V operating voltage. One end of the second supplementary lighting module 15 is connected to the seventh pin of the control chip U1, and the other end is connected to a 5V operating voltage. The control chip U1 is used to precisely control the current, providing a constant current to both the first supplementary lighting module 14 and the second supplementary lighting module 15.

[0029] In practical use, the MCU chip is connected to the dual-control light source supplementary lighting module control circuit through interface J1. When the MCU chip sends a high-level signal to the W-EN terminal of interface J1, the high-level signal is divided by the first voltage divider chip and then input to the second pin of the control chip U1, avoiding direct input of electrical signals to the control chip U1 and preventing damage to the control chip U1. When the second pin of the control chip U1 receives the high-level signal, the eighth pin of the control chip U1 outputs a constant current to power the first supplementary lighting module 14, causing the first supplementary lighting module 14 to light up.

[0030] When the MCU chip sends a high-level signal to the IR-EN terminal of interface J1, the high-level signal is input to the second voltage divider module 13. The second voltage divider module 13 divides the high-level signal at the IR-EN terminal and inputs the divided high-level signal to the control chip U1. When the third pin of the control chip U1 receives the high-level signal, the seventh pin of the control chip U1 outputs a constant current to power the second supplementary lighting module 15, enabling the second supplementary lighting module 15 to emit light evenly. In this way, by using the control chip U1 to control the first supplementary lighting module 14 and the second supplementary lighting module 15 respectively, providing a constant current to the first supplementary lighting module 14 and the second supplementary lighting module 15, the first supplementary lighting module 14 and the second supplementary lighting module 15 emit light evenly. This achieves the driving control of the first supplementary lighting module 14 and the second supplementary lighting module 15 through a set of control circuits, effectively reducing the number of circuit components, greatly simplifying the circuit structure, and facilitating the processing and production of the dual-source supplementary lighting module control circuit.

[0031] Please refer to Figure 1 and Figure 2 , Figure 2 This is the circuit diagram of the light-sensing module in this example. Furthermore, the dual-source supplementary lighting module control circuit also includes a light-sensing module 3. The light-sensing module 3 senses changes in ambient light and generates control signals based on these changes. The light-sensing module 3 has a voltage input terminal 31 and a control signal terminal 32. The voltage input terminal 31 is connected to the operating voltage terminal of the interface module 2, and the control signal terminal 32 is connected to the ADC terminal of the interface module 2. In use, the interface module 2 is connected to an external MCU chip. The light-sensing module 3 generates a high-level signal or a low-level signal based on changes in ambient light intensity and outputs it to the ADC terminal of the interface module 2. The MCU chip outputs a W-EN signal or an IR-EN signal based on the received high-level or low-level signal. When the light-sensing module 3 is in daylight or a bright environment, its control signal terminal 32 outputs a low-level signal to the ADC terminal of the interface module 2. The external MCU chip receives the low-level signal through the interface module 2 and outputs a W-EN signal, causing the first supplementary lighting module 14 to light up. When the light sensor module 3 is in a dark or nighttime environment, its control signal terminal 32 outputs a high level to the ADC terminal of the interface module 2. The external MCU chip receives the high-level signal through the interface module 2 and outputs an IR-EN signal, causing the second supplementary light module 15 to light up.

[0032] Specifically, in this example, the photosensitive module 3 includes a photoresistor CDS, a transistor Q1, resistors R13, R12, R10, R9, R4, R11, and a capacitor C2. One end of the photoresistor CDS is connected to the operating voltage terminal of the interface module 2, and the other end is connected to resistor R13. The other end of resistor R13 is connected to the base 2 of transistor Q1, one end of resistor R12, and capacitor C2, respectively. Resistor R13 is used for current limiting. One end of resistor R12 is connected to resistor R13 and transistor Q1, and the other end is grounded. Resistor R12 is a pull-down resistor for the base of transistor Q1. One end of capacitor C2 is connected to resistor R13 and the base 2 of transistor Q1, and the other end is grounded. Capacitor C2 is used for filtering. The emitter 1 of transistor Q1 is grounded, and the collector 3 of transistor Q1 is connected to resistors R9, R10, R4, and R11, respectively. One end of resistor R9 is connected to the collector 3 of transistor Q1, and the other end is connected to the ADC terminal of interface module 2. The two ends of resistor R10 are connected to the base 2 and collector 3 of transistor Q1, respectively; resistor R10 is used for current limiting. One end of resistor R4 is connected to the operating voltage terminal of both the photoresistor CDS and interface module 2; the other end is connected in series with resistor R11, and the other end of resistor R11 is grounded. The connection point between resistors R4 and R11 is connected to the base 3 of transistor Q1; resistors R4 and R11 are used for voltage division.

[0033] The photoresistor CDS is used to sense changes in the environment. When the photoresistor CDS is in daylight or a bright environment, its resistance decreases and its current increases. In this example, transistor Q1 is an NPN transistor. The current output from the photoresistor CDS is limited by resistor R13 and then input to the base 2 of transistor Q1, at which point the base 2 of transistor Q1 is at a high level. Transistor Q1 is turned on, and its collector 3 is at a low level, resulting in a low-level signal output from the ADC terminal of interface module 2. When the photoresistor CDS is in darkness or a low-light environment, its resistance increases and its current decreases. At this time, the base 2 of transistor Q1 is at a low level, transistor Q1 is in the off state, and its collector 3 is at a high level, resulting in a high-level signal output from the ADC terminal of interface module 2. In practical applications, the ADC terminal of interface module 2 is connected to an external MCU chip. The MCU chip switches the first supplementary light module 14 or the second supplementary light module 15 to light up based on the high or low level signal output by the light sensing module 3.

[0034] Furthermore, the RC module 11 includes a filter unit 111 and a first current limiting unit 112. One end of the first current limiting unit 112 is connected to the first pin of the control chip U1, and the other end is connected to the operating voltage terminal of the interface module 2. One end of the filter unit 111 is connected to both the operating voltage terminal of the interface module 2 and the first current limiting unit 112, and the other end is grounded.

[0035] In this embodiment, the first current limiting unit 112 includes a resistor R3, which is used for current limiting. The filtering unit 111 includes a capacitor C1, which is used for filtering. One end of the resistor R3 is connected to the operating voltage terminal of the interface module 2, and the other end is connected to the first pin of the control chip U1. One end of the capacitor C1 is connected to both the operating voltage terminal of the interface module 2 and one end of the resistor R3, and the other end is grounded. The 5V operating voltage provided by the operating voltage terminal of the interface module 2 is input to the RC module 11, filtered by the capacitor C1 and current-limited by the resistor R3, and then input to the first pin of the control chip U1, providing a stable voltage for the control chip U1.

[0036] The first voltage divider module 1212 includes a first voltage divider unit 121 and a first pull-down unit 122. One end of the first voltage divider unit 121 is connected to the second pin of the control chip U1, and the other end is connected to the W-EN terminal. One end of the first pull-down unit 122 is connected to both the first voltage divider unit 121 and the second pin of the control chip U1, and the other end is grounded.

[0037] In this example, the first voltage divider unit 121 includes a resistor R5, and the first pull-down unit 122 includes a resistor R6. One end of resistor R5 is connected to the second pin of the control chip U1, and the other end is connected to the W-EN terminal. One end of resistor R6 is connected to both resistor R5 and the second pin of the control chip U1, and the other end is grounded. Resistor R5 is used for current limiting, and resistor R6 is a pull-down resistor. When there is no high-level W-EN signal input at the W-EN terminal, resistor R6 keeps the second pin of the control chip U1 at a low level to prevent possible high-level signals from interfering with the control chip U1.

[0038] The second voltage divider module 13 includes a second voltage divider unit 131 and a second pull-down unit 132. One end of the second voltage divider unit 131 is connected to the third pin of the control chip U1, and the other end is connected to the IR-EN terminal. One end of the second pull-down unit 132 is connected to both the second voltage divider unit 131 and the third pin of the control chip U1, and the other end is grounded.

[0039] In this example, the second voltage divider unit 131 includes a resistor R7, and the second pull-down unit 132 includes a resistor R8. Resistor R7 is used for current limiting, and resistor R8 serves as a pull-down resistor for the third pin of the control chip U1.

[0040] Furthermore, the first supplementary lighting module includes multiple first light-emitting units 141 connected in parallel. The negative terminals of the multiple first light-emitting units 141 are connected to the eighth pin of the control chip, and the positive terminals of the multiple first light-emitting units 141 are connected to the operating voltage terminals of the second supplementary lighting module and the interface module 2. In this example, there are four first light-emitting units 141, and each first light-emitting unit 141 is a white LED. The negative terminals of the four first light-emitting units 141 are connected to the eighth pin of the control chip U1, and the positive terminals of the four first light-emitting units 141 are connected to the operating voltage terminals of the second supplementary lighting module 15 and the interface module 2.

[0041] The second supplementary lighting module 15 includes multiple sets of second light-emitting units 151 connected in parallel. One end of each set of light-emitting elements 1511 is connected to the seventh pin of the control chip U1, and the other end is connected to the operating voltage terminal of the interface module 2. Each set of second light-emitting units 151 includes multiple light-emitting elements 1511, and these multiple light-emitting elements 1511 are connected in series. In this example, the second supplementary lighting module 15 includes two sets of second light-emitting units 151 connected in series, and each set of second light-emitting units 151 includes two light-emitting elements 1511 connected in series. Preferably, the light-emitting elements 1511 are infrared light-emitting diodes.

[0042] The dual-source lighting module also includes a third voltage divider unit 16. One end of the third voltage divider unit 16 is connected to the sixth pin of the control chip U1, and the other end is grounded. The third voltage divider unit 16 is used to protect the control chip U1. If the control chip U1 experiences internal breakdown, the third voltage divider unit 16 can act as a voltage divider to prevent the voltage from being directly pulled to ground, thereby protecting the control chip U1. In this example, the third voltage divider unit 16 includes a resistor R2. One end of the resistor R2 is connected to the current pin of the control chip U1, and the other end is grounded.

[0043] The dual-source lighting module also includes a fourth voltage divider unit 17. One end of the fourth voltage divider unit 17 is connected to the fifth pin of the control chip U1, and the other end is grounded. The fourth voltage divider unit 17 is used to protect the control chip U1, and its function is the same as that of the third voltage divider unit 16, which will not be described in detail here. In this example, the fourth voltage divider unit 17 includes a resistor R1. One end of the resistor R1 is connected to the fifth pin of the control chip U1, and the other end is grounded.

[0044] Example 2

[0045] Please refer to Figures 3-4 , Figure 3 This is the control circuit diagram for the dual-source fill light module in this example. Figure 4This is the circuit diagram of the photosensing module in this example. In this embodiment, interface module 2 includes interface J2, which has pins 1-7. Pin 1 is the operating voltage terminal, used to connect to the power supply voltage; in this example, the power supply voltage is 12V. Pin 2 is the ground terminal, used for grounding. Pin 3 is the ADC terminal, pin 4 is the W-EN terminal, and pin 5 is the IR-EN terminal.

[0046] In this example, the first supplementary lighting module 14 includes a set of first shunt modules 142 and two first light-emitting units 141. The first shunt modules 142 include three first shunt units 1421 connected in parallel. One end of each of the three first shunt units 1421 is connected to the sixth pin of the control chip U1, and the other end of each first shunt unit 1421 is connected in series with the two first light-emitting units 141. Furthermore, the negative terminal of one of the first light-emitting units 141 is connected to all three first shunt units 1421, its positive terminal is connected to the negative terminal of another first light-emitting unit 141, and the positive terminal of the other first light-emitting unit 141 is connected to pin 1 of J2.

[0047] In this embodiment, the second supplementary lighting module 15 includes a set of second shunt modules 152 and two light-emitting units. The second shunt module 152 includes four second shunt units 1521 connected in parallel. One end of each second shunt unit 1521 is connected to the seventh pin of the control chip U1, and the other end is connected in series with two second light-emitting units 151. The negative terminal of one second light-emitting unit 151 is connected to the four second shunt units 1521, its positive terminal is connected to the negative terminal of another second light-emitting unit 151, and the positive terminal of the other second light-emitting unit 151 is connected to pin 1 of interface J2.

[0048] In this embodiment, the photosensitive module 3 includes a photoresistor CDS1, a transistor Q2, resistors R21, R22, R23, R24, R25, and R26, and a Zener diode D9. One end of resistor R21 is connected to a 12V operating voltage, and the other end is connected to the photoresistor CDS1; resistor R21 is used for current limiting. One end of the photoresistor CDS1 is connected to resistor R21, the cathode of the Zener diode D9, and resistor R23, and the other end is connected to the base 1 of transistor Q2 and resistor R22. One end of resistor R22 is connected to the photoresistor CDS1 and the base 1 of transistor Q2, and the other end is grounded; resistor R22 acts as a pull-down resistor for the base 1 of transistor Q2. One end of resistor R25 is connected to the collector 2 of transistor Q2, and the other end is connected in series with resistor R26. The other end of resistor R26 is grounded, and the connection point between resistors R25 and R26 is connected to the ADC terminal of interface module 2. Resistors R25 and R26 are used for voltage division. One end of resistor R23 is connected to the cathode of resistor R21, photoresistor CDS1, and Zener diode D9, respectively. The other end of resistor R23 is connected to the emitter 3 of transistor Q2 and one end of resistor R24, respectively. The other end of resistor R24 ​​is grounded. Resistors R23 and R24 are used for voltage division. One end of Zener diode D9 is connected to resistor R21, photoresistor CDS1, and resistor R23, respectively. The other end of Zener diode D9 is grounded. Zener diode D9 is used for voltage regulation.

[0049] In this example, transistor Q2 is a PNP transistor. The 12V supply voltage is current-limited by resistor R21 and then input to photoresistor CDS1. When photoresistor CDS1 is in daylight or a bright environment, its resistance decreases and its current increases, causing the base (1) of transistor Q2 to be high, turning Q2 off, and the collector (2) of transistor Q2 to be low, resulting in a low-level output from the ADC terminal of interface module 2. When photoresistor CDS1 is in darkness or a dark environment, its resistance increases and its current decreases, causing the base (1) of transistor Q2 to be high, turning Q2 on, and the collector (2) of transistor Q2 to be high, resulting in a high-level output from the ADC terminal of interface module 2.

[0050] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A control circuit for a dual-source supplementary lighting module, characterized in that, include: A supplementary lighting control module (1) and an interface module (2); the interface module (2) has a W-EN terminal, an IR-EN terminal, an ADC terminal, and a working voltage terminal; the supplementary lighting control module (1) includes a control chip U1, an RC module (11), a first voltage divider module (12), a second voltage divider module (13), a first supplementary lighting module (14), and a second supplementary lighting module (15); the control chip U1 has a first pin to an eighth pin; one end of the RC module (11) is connected to the working voltage terminal of the interface module (2), and the other end is connected to the first pin of the control chip U1; the first voltage divider module One end of (12) is connected to the W-EN terminal of the interface module (2), and the other end is connected to the second pin of the control chip U1; one end of the second voltage divider module (13) is connected to the IR-EN terminal of the interface module (2), and the other end is connected to the third pin of the control chip U1; one end of the first supplementary light module (14) is connected to the eighth pin of the control chip U1; the other end is connected to the working voltage terminal of the interface module (2); one end of the second supplementary light module (15) is connected to the seventh pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module (2).

2. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, It also includes a light sensing module (3), which has a voltage input terminal (31) and a control signal terminal (32); the voltage input terminal (31) is connected to the working voltage terminal of the interface module (2); the control signal terminal (32) is connected to the ADC terminal of the interface module (2).

3. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The RC module (11) includes a filter unit (111) and a first current limiting unit (112). One end of the first current limiting unit (112) is connected to the first pin of the control chip U1, and the other end is connected to the working voltage terminal of the interface module (2). One end of the filter unit (111) is connected to the working voltage terminal of the interface module (2) and the first current limiting unit (112), and the other end is grounded.

4. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The first voltage divider module (12) includes a first voltage divider unit (121) and a first pull-down unit (122); one end of the first voltage divider unit (121) is connected to the second pin of the control chip U1, and the other end is connected to the W-EN terminal of the interface module (2); one end of the first pull-down unit (122) is connected to the first voltage divider unit (121) and the second pin of the control chip U1 respectively, and the other end is grounded.

5. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The first supplementary lighting module (14) includes multiple first light-emitting units (141), which are connected in parallel. The negative terminals of the multiple first light-emitting units (141) are connected to the eighth pin of the control chip U1. The positive terminals of the multiple first light-emitting units (141) are connected to one end of the second supplementary lighting module (15) and the working voltage terminal of the interface module (2).

6. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The second supplementary lighting module (15) includes multiple sets of parallel second light-emitting units (151). One end of each set of the second light-emitting units (151) is connected to the seventh pin of the control chip U1, and the other end of each set of the second light-emitting units (151) is connected to the working voltage terminal of the first supplementary lighting module (14) and the interface module (2). Each second light-emitting unit (151) includes multiple light-emitting elements (1511), and the multiple light-emitting elements (1511) are connected in series.

7. The control circuit for the dual-source supplementary lighting module according to claim 2, characterized in that, The photosensitive module (3) includes a photoresistor CDS, a transistor Q1, resistors R13, R12, R10, R9, R4, R11, and a capacitor C2; one end of the photoresistor CDS is connected to the working voltage terminal of the interface module (2), and the other end is connected to the resistor R13; the other end of the resistor R13 is connected to the base of the transistor Q1, one end of the resistor R12, and the capacitor C2; one end of the resistor R12 is connected to the base of the transistor Q1, the resistor R13, the capacitor C2, and the resistor R10, and the other end is grounded; one end of the capacitor C2 is connected to the base of the transistor Q1, the resistor R12, the capacitor C2, and the resistor R2, and its... The other end is grounded; the emitter of the transistor Q1 is grounded; one end of the resistor R9 is connected to the ADC terminal of the interface module (2), and the other end is connected to the collector of the transistor Q1, the resistor R10, the resistor R4 and the resistor R11 respectively; the two ends of the resistor R10 are connected to the base and the collector of the transistor Q1 respectively; one end of the resistor R4 is connected to the working voltage terminal of the photoresistor CDS and the interface module (2) respectively, and the other end is connected in series with the resistor R11; one end of the resistor R11 is connected to the resistor R4 and the collector of the transistor Q1 respectively, and the other end is grounded; the connection node of the resistor R4 and the resistor R11 is connected to the base of the transistor Q1.

8. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The first supplementary lighting module (14) includes two first light-emitting units (141) and a first shunt module (142); the first shunt module (142) includes three first shunt units (1421) connected in parallel; one end of the three first shunt units (1421) is connected to the sixth pin of the control chip U1, and the other end of the three first shunt units (1421) is connected in series with the two first light-emitting units (141); one end of one first light-emitting unit (141) is connected to the three first shunt units (1421) respectively, and its other end is connected to another first light-emitting unit (141); one end of the other first light-emitting unit (141) is connected to the working voltage terminal of the interface module (2).

9. The control circuit for the dual-source supplementary lighting module according to claim 1, characterized in that, The second supplementary lighting module (15) includes a second shunt module (152) and two second light-emitting units (151); the second shunt module (152) includes four second shunt units (1521) connected in parallel; one end of the four second shunt units (1521) is connected to the seventh pin of the control chip U1, and the other end of the four second shunt units (1521) is connected in series with two second light-emitting units (151); one end of one second light-emitting unit (151) is connected to the four second shunt units (1521) respectively, and its other end is connected in series with another second light-emitting unit (151), and the other second light-emitting unit (151) is connected to the working voltage terminal of the interface module (2).

10. The control circuit for the dual-source supplementary lighting module according to claim 2, characterized in that, The photosensitive module (3) includes a resistor R21, a photoresistor CDS1, a transistor Q2, resistors R22, R23, R24, R25, and R26, and a Zener diode D9; one end of the resistor R21 is connected to the operating voltage terminal of the interface module (2), and the other end is connected to one end of the photoresistor CDS1, the other end of which is connected to the transistor Q2 and the resistor R22 respectively; one end of the resistor R22 is connected to the base of the photoresistor CDS1 and the transistor Q2 respectively, and the other end is grounded; the voltage regulator diode D9 is also connected to the photoresistor CDS1 and the photoresistor Q2. One end of resistor R23 is connected to resistor R21, photoresistor CDS1 and Zener diode D9 respectively, and the other end is connected to the emitter of transistor Q2 and resistor R24 ​​respectively; one end of resistor R24 ​​is connected to resistor R23 and emitter of transistor Q2 respectively, and the other end is grounded; one end of resistor R25 is connected to collector of transistor Q2, and the other end is connected in series with one end of resistor R26; the other end of resistor R26 is grounded; the node between resistor R25 and resistor R26 is connected to the ADC terminal of interface module (2).

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