Lamp driving circuit device and control equipment

Abstract

The invention relates to the field of driving circuits, in particular to a lamp driving circuit device and control equipment, the device comprises a dimming signal acquisition module, a sampling module and a signal processing module, the dimming signal acquisition module is composed of a receiving end, a protection circuit, a buffer circuit and an output circuit in sequence, and is responsible for receiving a DIM + dimming signal; instantaneous voltage spikes are suppressed, and ADC1 signals are output after output impedance is adjusted. The sampling module is responsible for acquiring voltage (VO-SENE) and current (IO-SENE) sampling signals of the lamp. The signal processing module integrates a first microprocessor, a second microprocessor and a photoelectric coupler, the second microprocessor receives ADC1 signals for analog-to-digital conversion, and the ADC1 signals are sent to the first microprocessor after being safely isolated through the photoelectric coupler. The first microprocessor comprehensively processes the ADC1 signal and the voltage and current sampling signals, and finally outputs a PWM control signal to adjust the brightness of the lamp. The method can effectively improve the stability of the dimming signal and the accuracy of lamp control, and is suitable for various illumination application scenes.

Description

Technical Field

[0001] The present invention relates to the field of driving circuits, and in particular to a lamp driving circuit device and a control device. Background Art

[0002] In the field of LED lighting system control, circuit design and optimization are particularly important to achieve efficient, safe and flexible dimming control. In traditional LED lamp control circuits, the sampling of lamp voltage and lamp current is often directly related to the dimming signal input unit, which may cause signal interference, electromagnetic compatibility problems and safety hazards. In order to solve these problems, the industry has begun to explore the design of isolating the sampling module from the dimming signal input unit.

[0003] In addition, the voltage range of LED lamps is usually relatively wide. In order to achieve a constant lighting effect, that is, to maintain a constant power output, the control circuit needs to be able to automatically adjust the current according to the actual voltage of the lamp to ensure power stability. This requirement requires the control circuit to have good voltage adaptability and power regulation capabilities.

[0004] At the same time, with the development of intelligence, microprocessors are increasingly used in LED lighting control. By receiving dimming signals and monitoring output status through microprocessors, more accurate and flexible dimming control can be achieved. However, in order to ensure the safety and stability of the system, isolation measures between microprocessors and between microprocessors and high-voltage circuits are also particularly important. Summary of the invention

[0005] Based on the above technical problems, the present invention provides a lamp driving circuit device and a control device to solve the shortcomings of the existing lamp driving device that the lamp needs to use a dimming circuit and a control unit with expensive costs and complex circuits to dim the lamp. The lamp driving circuit device includes:

[0006] A dimming signal acquisition module, the dimming signal acquisition module includes a receiving end, a protection circuit, a buffer circuit and an output circuit connected in sequence, the receiving end receives an external DIM+ dimming signal, suppresses the instantaneous voltage spike of the DIM+ dimming signal through the protection circuit, obtains a pre-processed DIM+ dimming signal, the buffer circuit adjusts the output impedance of the pre-processed DIM+ dimming signal, and outputs an ADC1 signal through the output circuit;

[0007] A sampling module, wherein the sampling module obtains a voltage sampling signal VO-SENE and a current sampling signal IO-SENE of the lamp;

[0008] And a signal processing module, the signal processing module includes a first microprocessor, a second microprocessor and at least one photocoupler, the second microprocessor is connected to the output circuit to receive the ADC1 signal for analog-to-digital conversion processing, the second microprocessor is connected to the first microprocessor through the photocoupler, and sends the ADC1 signal after digital-to-analog conversion to the first microprocessor, the first microprocessor processes the ADC1 signal after digital-to-analog conversion, the voltage sampling signal VO-SENE and the current sampling signal IO-SENE, and outputs a PWM control signal.

[0009] In one embodiment of the present invention, the protection circuit includes a TVS diode D5 and resistors R8 and R9 connected to the receiving end, the other end of the resistor R9 is connected to the input end of the buffer circuit, the first end of the TVS diode D5 is grounded, and the second end thereof is connected to the receiving end.

[0010] In one embodiment of the present invention, the buffer circuit includes an integrated operational amplifier unit U1B, the inverting input terminal of the integrated operational amplifier unit U1B is connected to its output terminal, and the non-inverting input terminal is connected to the resistor R9 to form a voltage follower to buffer the pre-processed DIM+ dimming signal.

[0011] In one embodiment of the present invention, the output circuit includes a capacitor C11, a resistor R10, a resistor R11 and a capacitor C8; wherein the first end of the resistor R10 is connected to the output end of the integrated operational amplifier unit U1B, and the second end thereof is connected to the first end of the resistor R11, and the second end of the resistor R11 is connected to the first end of the TVS diode D5; the capacitor C11 is connected to the first end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5; the first end of the capacitor C8 is connected to the second end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5.

[0012] In one embodiment of the present invention, the sampling module includes a voltage input terminal, a potentiometer R12, a potentiometer R13 and a resistor RCS, the voltage input terminal receives a voltage VOUT+, the voltage input terminal is respectively connected to a first end of the potentiometer R12 and a lamp, the second end of the potentiometer R12 is connected to a first end of the potentiometer R13, the second end of the potentiometer R13 is connected to a first end of the resistor RCS, the second end of the resistor RCS is connected to a negative electrode of the lamp, and the negative electrode of the lamp is connected to a voltage VOUT-;

[0013] The voltage VOUT+ is divided by potentiometers R12 and R13 to obtain a voltage sampling signal VO-SENE, and the output current of the lamp passes through the resistor RCS to collect a current sampling signal IO-SENE at the second end of the resistor RCS.

[0014] In one embodiment of the present invention, the device further comprises a power supply module, the power supply module comprises at least one 5V three-terminal voltage regulator, and the 5V three-terminal voltage regulator supplies power to the photoelectric coupler.

[0015] In one embodiment of the present invention, the optocoupler includes an optocoupler OP1 and an optocoupler OP2, the signal sending pin of the second microprocessor is connected to the signal receiving pin of the first microprocessor through the optocoupler OP1, and the signal sending pin of the first microprocessor is connected to the signal receiving pin of the second microprocessor through the optocoupler OP2.

[0016] In one embodiment of the present invention, the signal processing module further includes a resistor R1, a resistor R2, a resistor R5 and a resistor R6;

[0017] The resistor R1 is arranged on a connection path between the output end of the photocoupler OP1 and the signal receiving pin of the first microprocessor, and the resistor R2 is arranged on a connection path between the input end of the photocoupler OP1 and the power module;

[0018] The resistor R5 is arranged on the connection path between the output end of the photocoupler OP2 and the signal receiving pin of the second microprocessor, and the resistor R5 is connected to the power module; the resistor R6 is arranged on the connection path between the input end of the photocoupler OP2 and the signal sending pin of the first microprocessor.

[0019] In one embodiment of the present invention, the DIM+ dimming signal is a 0-10V analog signal or a PWM signal.

[0020] The present invention also provides a control device, which includes the lamp driving circuit device and a control terminal described in the above technical solution, and the control terminal sends an adjustment instruction to the lamp driving circuit device and adaptively adjusts the power of the lamp through the lamp driving circuit device.

[0021] The above technical solution of the present invention has the following advantages compared with the prior art:

[0022] The present invention reduces the cost of the lamp driving circuit device by simplifying the design of the dimming circuit and the control unit, while improving the stability and reliability of the system, achieving accurate reception and processing of the DIM+ dimming signal, supporting dual dimming modes of 0-10V analog signals and PWM signals, and flexibly meeting the different needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 is a structural schematic diagram of a lamp driving circuit device provided in an embodiment of the present invention;

[0025] Figure 2 is a circuit diagram of a dimming signal acquisition module provided in an embodiment of the present invention;

[0026] Figure 3 is a circuit diagram of a sampling module provided in one embodiment of the present invention;

[0027] Figure 4 is a circuit diagram of a signal processing module provided in an embodiment of the present invention;

[0028] Explanation of the reference numerals in the specification: 10, dimming signal acquisition module; 101, receiving end; 102, protection circuit; 103, buffer circuit; 104, output circuit; 20, sampling module; 30, signal processing module; 40, power supply module; 50, lamp. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0030] Embodiment 1

[0031] like Figure 1 to Figure 4 As shown, the present invention provides a lamp driving circuit device, which includes a dimming signal acquisition module 10, a sampling module 20 and a signal processing module 30;

[0032] The dimming signal acquisition module 10 includes a receiving end 101, a protection circuit 102, a buffer circuit 103 and an output circuit 104 connected in sequence, the receiving end 101 receives an external DIM+ dimming signal, suppresses the instantaneous voltage spike of the DIM+ dimming signal through the protection circuit 102, and obtains a pre-processed DIM+ dimming signal, the buffer circuit 103 adjusts the output impedance of the pre-processed DIM+ dimming signal, and outputs an ADC1 signal through the output circuit 104;

[0033] The sampling module 20 obtains a voltage sampling signal VO-SENE and a current sampling signal IO-SENE of the lamp 50;

[0034] The signal processing module 30 includes a first microprocessor, a second microprocessor and at least one photocoupler. The second microprocessor is connected to the output circuit 104 to receive the ADC1 signal for analog-to-digital conversion. The second microprocessor is connected to the first microprocessor through the photocoupler to send the ADC1 signal after digital-to-analog conversion to the first microprocessor. The first microprocessor processes the ADC1 signal after digital-to-analog conversion, the voltage sampling signal VO-SENE and the current sampling signal IO-SENE, and outputs a PWM control signal.

[0035] It can be seen from the above technical solutions that the protection circuit 101 in the dimming signal acquisition module 10 can effectively suppress the instantaneous voltage spike of the DIM+ dimming signal, thereby protecting the subsequent circuit from damage and ensuring the stability and accuracy of the dimming signal. The adjustment function of the buffer circuit 102 optimizes the output impedance of the pre-processed DIM+ dimming signal, which helps to reduce the loss and interference of the signal during transmission and improve the transmission efficiency and quality of the signal. The sampling module 20 can obtain the voltage and current sampling signals of the lamp in real time, which provides an accurate data basis for subsequent signal processing and helps to achieve accurate monitoring and adjustment of the working state of the lamp. The second microprocessor in the signal processing module 30 is responsible for receiving the ADC1 signal and performing analog-to-digital conversion processing. The converted signal is safely transmitted to the first microprocessor through the photoelectric coupler. The use of the photoelectric coupler realizes electrical isolation during data transmission, enhances the safety and stability of the system, and avoids signal distortion or system failure caused by electrical interference. The entire device adopts a modular design, and the functions of each module are clear and independent of each other, which is convenient for system maintenance, upgrading and expansion.

[0036] In order to ensure that the DIM+ dimming signal can be safely and stably received and processed in a harsh electrical environment, a protection circuit 102 is set in the dimming signal acquisition module 10. The protection circuit 102 includes a TVS diode D5 and resistors R8 and R9 connected to the receiving end. The other end of the resistor R9 is connected to the input end of the buffer circuit 103. The first end of the TVS diode D5 is grounded, and the second end thereof is connected to the receiving end 101.

[0037] By combining TVS diode D5 with receiving terminal 101 and resistors R8 and R9, an effective protection network is formed, wherein TVS diode D5 (transient voltage suppression diode) has extremely fast response speed and high surge absorption capacity. When a transient voltage spike appears in the external DIM+ dimming signal, TVS diode D5 can quickly guide the excess voltage energy to the ground, thereby effectively suppressing the voltage spike and preventing it from damaging subsequent circuits, such as buffer circuit 103 and output circuit 104; resistors R8 and R9 not only play a current limiting role, but also can attenuate the high-frequency noise from the DIM+ dimming signal source to a certain extent, further protecting the circuit from interference.

[0038] During signal transmission, the signal often attenuates due to the presence of line resistance, capacitance and other factors. The buffer circuit 103, as a "buffer" for signal transmission, can effectively shield the influence of external interference signals on the DIM+ dimming signal. Through its high input impedance characteristics, the buffer circuit 103 can reduce the coupling of external noise signals, thereby improving the anti-interference ability of the entire dimming signal acquisition module 10.

[0039] Specifically, Figure 2 As shown, the buffer circuit 103 includes an integrated operational amplifier unit U1B, the inverting input terminal of the integrated operational amplifier unit U1B is connected to its output terminal, and the non-inverting input terminal thereof is connected to the resistor R9 to form a voltage follower, which buffers the pre-processed DIM+ dimming signal, minimizes the signal loss during transmission, and ensures that the DIM+ dimming signal still maintains a high signal-to-noise ratio and accuracy when reaching the output circuit 104. Further, the integrated operational amplifier unit U1B includes at least one operational amplifier.

[0040] In addition, the buffer circuit 103 also plays a role in protecting the subsequent circuits. Since the DIM+ dimming signal may still contain large instantaneous voltage changes, directly acting on the subsequent circuits may cause damage to them. Through the voltage following and impedance matching functions of the buffer circuit 103, these instantaneous voltage changes can be smoothed, thereby protecting the subsequent circuits from damage.

[0041] Specifically, the output circuit 104 includes a capacitor C11, a resistor R10, a resistor R11 and a capacitor C8; wherein the first end of the resistor R10 is connected to the output end of the integrated operational amplifier unit U1B, and the second end thereof is connected to the first end of the resistor R11, and the second end of the resistor R11 is connected to the first end of the TVS diode D5; the capacitor C11 is connected to the first end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5; the first end of the capacitor C8 is connected to the second end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5.

[0042] In the output circuit 104, capacitor C11 and capacitor C8 play a role of smoothing and filtering in the circuit: by absorbing and releasing charges, they effectively reduce high-frequency noise and ripples in the output signal, making the ADC1 signal smoother and more stable. The series connection of resistor R10 and resistor R11 constitutes an impedance matching network of the output circuit, which helps to reduce reflection and loss of the signal during transmission and improve the transmission efficiency and accuracy of the signal. At the same time, by adjusting the resistance value of the resistor, the performance of the output circuit can be further optimized to meet the needs of different application scenarios.

[0043] By real-time monitoring of the voltage and current information of the lamp 50, the sampling module 20 can timely detect abnormal changes in the working state of the lamp, such as voltage fluctuations, current overload, etc. This information can be used by the subsequent signal processing module 30 to adjust the PWM control signal, thereby ensuring the stable operation of the lamp 50 and extending the service life of the lamp 50.

[0044] Furthermore, if Figure 3 As shown, the sampling module 20 includes a voltage input terminal, a potentiometer R12, a potentiometer R13 and a resistor RCS, the voltage input terminal receives a voltage VOUT+, the voltage input terminal is respectively connected to a first end of the potentiometer R12 and a lamp 50, a second end of the potentiometer R12 is connected to a first end of the potentiometer R13, a second end of the potentiometer R13 is connected to a first end of the resistor RCS, a second end of the resistor RCS is connected to a negative electrode of a lamp 50 composed of at least two LED lamps connected in series, and a negative electrode of the lamp 50 is connected to a voltage VOUT-;

[0045] The voltage VOUT+ is divided by potentiometers R12 and R13 to obtain a voltage sampling signal VO-SENE. The output current of the lamp 50 passes through the resistor RCS, and a current sampling signal IO-SENE is collected at the second end of the resistor RCS.

[0046] In the sampling module 20, the actual voltage of the lamp 50 can be obtained through the voltage divider circuit of the potentiometer R12 and the potentiometer R13, which helps to determine whether the working state of the lamp 50 is normal and whether the dimming signal needs to be adjusted to maintain a stable output voltage. The resistor RCS is used as a current sampling resistor, and the output current information of the lamp 50 is obtained by measuring the voltage drop across the resistor RCS. This current sampling method is simple and effective, can accurately reflect the working current of the lamp 50, and provides an important current feedback signal for the signal processing module 30.

[0047] Further on the basis of the above technical solution, the device also includes a power module 40, and the power module 40 includes at least one 5V three-terminal regulator, and the 5V three-terminal regulator supplies power to the photoelectric coupler.

[0048] Among them, Figure 4 As shown, the photocoupler includes a photocoupler OP1 and a photocoupler OP2, the signal sending pin TXD of the second microprocessor is connected to the signal receiving pin RXD of the first microprocessor through the photocoupler OP1, and the signal sending pin TXD of the first microprocessor is connected to the signal receiving pin RXD of the second microprocessor through the photocoupler OP2.

[0049] Further, the signal processing module 30 further includes a resistor R1, a resistor R2, a resistor R5 and a resistor R6; wherein the resistor R1 is arranged on a connection path between the output end of the photocoupler OP1 and the signal receiving pin RXD of the first microprocessor, and the resistor R2 is arranged on a connection path between the input end of the photocoupler OP1 and the power module 40;

[0050] The resistor R5 is arranged on the connection path between the output end of the photocoupler OP2 and the signal receiving pin RXD of the second microprocessor, and the resistor R5 is connected to the power module 40; the resistor R6 is arranged on the connection path between the input end of the photocoupler OP2 and the signal sending pin TXD of the first microprocessor.

[0051] The signal processing module 30 achieves signal isolation between different circuit parts through the photocoupler OP1 and the photocoupler OP2. This isolation mechanism not only effectively curbs the mutual interference between circuits, but also significantly improves the anti-interference performance and stability of the system. At the same time, the photocoupler also protects the microprocessor from high voltage or high current shocks, thereby extending the service life of the microprocessor.

[0052] Resistors R1, R2, R5 and R6 are used in conjunction with the photocoupler to achieve signal conversion and transmission. Resistors R1 and R5 act as pull-up resistors to ensure the stability and reliability of the signal at the output of the photocoupler. Resistors R2 and R6 limit the current at the input of the photocoupler to prevent damage to components caused by excessive current.

[0053] Furthermore, the DIM+ dimming signal is a 0-10V analog signal or a PWM (pulse width modulation) signal. The 0-10V dimming method controls the brightness of the LED lamp by changing the input voltage. The higher the voltage, the brighter the lamp; conversely, the dimmer it is. The PWM dimming method adjusts the brightness of the LED lamp by changing the duty cycle of the pulse signal. The larger the duty cycle, the brighter the lamp; the smaller the duty cycle, the dimmer it is. Both dimming methods can achieve precise power adjustment to meet users' different needs for light output.

[0054] In summary, the lamp driving circuit device proposed in the present invention is suitable for various lamps that require dimming control, especially in occasions with high requirements for dimming accuracy and stability, such as smart home, commercial lighting, stage lighting and other fields.

[0055] Embodiment 2

[0056] The present invention also provides a control device, which includes the lamp driving circuit device and a control terminal described in Example 1, wherein the control terminal sends an adjustment instruction to the lamp driving circuit device and adaptively adjusts the power of the lamp through the lamp driving circuit device.

[0057] Furthermore, the lamp driving circuit device, as a core component, is responsible for receiving instructions from the control terminal and accurately adjusting the working power of the lamp according to these instructions. This process not only ensures that the light source or lamp can adjust the brightness according to actual needs, but also greatly improves the energy utilization efficiency and achieves the goal of green energy saving. At the same time, the control terminal, as a user interaction interface, provides an intuitive and easy-to-use operation method, allowing users to easily remotely control the power of the lamp, further enhancing the practicality and convenience of the device.

[0058] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A lamp driving circuit device, characterized in that: include: A dimming signal acquisition module, the dimming signal acquisition module includes a receiving end, a protection circuit, a buffer circuit and an output circuit connected in sequence, the receiving end receives an external DIM+ dimming signal, suppresses the instantaneous voltage spike of the DIM+ dimming signal through the protection circuit, obtains a pre-processed DIM+ dimming signal, the buffer circuit adjusts the output impedance of the pre-processed DIM+ dimming signal, and outputs an ADC1 signal through the output circuit; A sampling module, wherein the sampling module obtains a voltage sampling signal VO-SENE and a current sampling signal IO-SENE of the lamp; And a signal processing module, the signal processing module includes a first microprocessor, a second microprocessor and at least one photocoupler, the second microprocessor is connected to the output circuit to receive the ADC1 signal for analog-to-digital conversion processing, the second microprocessor is connected to the first microprocessor through the photocoupler, and sends the ADC1 signal after digital-to-analog conversion to the first microprocessor, the first microprocessor processes the ADC1 signal after digital-to-analog conversion, the voltage sampling signal VO-SENE and the current sampling signal IO-SENE, and outputs a PWM control signal.

2. The lamp driving circuit device according to claim 1, characterized in that: The protection circuit includes a TVS diode D5 and resistors R8 and R9 connected to the receiving end. The other end of the resistor R9 is connected to the input end of the buffer circuit. The first end of the TVS diode D5 is grounded, and the second end thereof is connected to the receiving end.

3. The lamp driving circuit device according to claim 2, characterized in that: The buffer circuit includes an integrated operational amplifier unit U1B, the inverting input terminal of the integrated operational amplifier unit U1B is connected to its output terminal, and the non-inverting input terminal of the integrated operational amplifier unit U1B is connected to the resistor R9 to form a voltage follower to buffer the pre-processed DIM+ dimming signal.

4. The lamp driving circuit device according to claim 3, characterized in that: The output circuit includes a capacitor C11, a resistor R10, a resistor R11 and a capacitor C8; wherein the first end of the resistor R10 is connected to the output end of the integrated operational amplifier unit U1B, the second end thereof is connected to the first end of the resistor R11, and the second end of the resistor R11 is connected to the first end of the TVS diode D5; the capacitor C11 is connected to the first end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5; the first end of the capacitor C8 is connected to the second end of the resistor R10, and the second end thereof is connected to the first end of the TVS diode D5.

5. The lamp driving circuit device according to claim 1, characterized in that: The sampling module includes a voltage input terminal, a potentiometer R12, a potentiometer R13 and a resistor RCS, the voltage input terminal receives a voltage VOUT+, the voltage input terminal is respectively connected to a first end of the potentiometer R12 and a lamp, the second end of the potentiometer R12 is connected to a first end of the potentiometer R13, the second end of the potentiometer R13 is connected to a first end of the resistor RCS, the second end of the resistor RCS is connected to a negative electrode of the lamp, and the negative electrode of the lamp is connected to a voltage VOUT-; The voltage VOUT+ is divided by potentiometers R12 and R13 to obtain a voltage sampling signal VO-SENE, and the output current of the lamp passes through the resistor RCS to collect a current sampling signal IO-SENE at the second end of the resistor RCS.

6. The lamp driving circuit device according to claim 1, characterized in that: The device further comprises a power supply module, wherein the power supply module comprises at least one 5V three-terminal voltage regulator, and the 5V three-terminal voltage regulator supplies power to the photoelectric coupler.

7. The lamp driving circuit device according to claim 6, characterized in that: The photocoupler includes a photocoupler OP1 and a photocoupler OP2. The signal sending pin of the second microprocessor is connected to the signal receiving pin of the first microprocessor through the photocoupler OP1. The signal sending pin of the first microprocessor is connected to the signal receiving pin of the second microprocessor through the photocoupler OP2.

8. The lamp driving circuit device according to claim 7, characterized in that: The signal processing module also includes a resistor R1, a resistor R2, a resistor R5 and a resistor R6; The resistor R1 is arranged on a connection path between the output end of the photocoupler OP1 and the signal receiving pin of the first microprocessor, and the resistor R2 is arranged on a connection path between the input end of the photocoupler OP1 and the power module; The resistor R5 is arranged on the connection path between the output end of the photocoupler OP2 and the signal receiving pin of the second microprocessor, and the resistor R5 is connected to the power module; the resistor R6 is arranged on the connection path between the input end of the photocoupler OP2 and the signal sending pin of the first microprocessor.

9. The lamp driving circuit device according to claim 1, characterized in that: The DIM+ dimming signal is a 0-10V analog signal or a PWM signal.

10. A control device, characterized in that: The device comprises a lamp driving circuit device and a control terminal as claimed in any one of claims 1 to 9, wherein the control terminal sends an adjustment instruction to the lamp driving circuit device and adaptively adjusts the power of the lamp through the lamp driving circuit device.

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