A temperature-adjustable stage lamp

Abstract

A temperature-adjustable stage lamp comprises a lamp head, a support frame and a bottom case, the lamp head is installed on the support frame, the bottom of the lamp head is provided with a heat dissipation cavity, the inside of the lamp head is provided with a control panel and a light source, the bottom of the support frame is connected with the bottom case, the stage lamp further comprises a cold and warm switching device, the device is integrated in the control panel, the device comprises a control input module, the control input module reads temperature data through a control signal, judges a mode signal of cooling or heating according to the temperature, sends the mode signal to a cold and warm mode conversion module, and simultaneously outputs working parameters to a driving power output module for processing, the driving power output module outputs corresponding current / voltage to the cold and warm mode conversion module after processing, the cold and warm mode conversion module switches the cold and warm switch according to the mode signal, then a cold and warm loop module is turned on according to the switching of the cold and warm mode conversion module, so that corresponding components are enabled to perform cooling / heating operation, finally, a cooling / heating fin module adjusts the intensity of cooling / heating according to the corresponding current / voltage.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and more specifically, to a stage light with adjustable temperature. Background Technology

[0002] During the use of stage lights, the temperature inside the lamp is a key factor in the normal operation of the lamp. If the temperature is too high, it will damage the internal components of the lamp. Most of the heat inside the lamp comes from the light source. If the light source is too hot, it will easily lead to overheating and damage to the internal components of the lamp body or shorten its service life. Moreover, the luminous flux of the light source itself will gradually decline or overheat and burn out. Therefore, it is necessary to dissipate heat from the light source in a timely manner.

[0003] In addition, in extremely low-temperature regions, the ambient temperature may not reach the normal operating temperature of the light source. If it is forced to start, it will damage the light source and shorten its lifespan. Therefore, it is necessary to provide a heat source to preheat the ambient temperature of the lamp and heat the ambient temperature to the operating conditions before starting the light source.

[0004] However, in existing technologies, the heat dissipation components and preheating components of the light source are handled in two separate modules, making it difficult to achieve miniaturization and weight reduction of the lamp body. Utility Model Content

[0005] The present invention aims to overcome at least one defect (deficiency) of the prior art and provide a stage lamp with adjustable temperature to solve the problems of the prior art where the heat dissipation component and the preheating component of the light source are processed in two separate modules, resulting in a large lamp body size and the inability to achieve lightweight design.

[0006] In the first aspect, the technical solution adopted by this utility model is an adjustable temperature stage lamp, including: a lamp head, a support frame and a base housing. The lamp head is mounted on the support frame, and the bottom of the lamp head is provided with a heat dissipation cavity, and the inside is provided with a control board and a light source. The bottom of the support frame is connected to the base housing.

[0007] The stage light also includes a heating / cooling switching device, which includes: a control input module, a drive power output module, a heating / cooling mode conversion module, a heating / cooling circuit module, and a cooling / heating element module connected in sequence.

[0008] The control input module reads temperature data and, based on a comparison with a preset temperature, determines whether to output a cooling or heating mode signal and sends it to the cooling / heating mode conversion module. Simultaneously, it outputs operating parameters to the drive power output module for processing. The drive power output module outputs corresponding current / voltage to the cooling / heating mode conversion module. The cooling / heating mode conversion module switches between cooling and heating modes based on the mode signal and directs the corresponding current / voltage to the relevant components of the cooling / heating circuit module, thereby adjusting the cooling / heating intensity of the cooling / heating element module to ensure that the temperature inside the stage light cavity remains within the normal operating range.

[0009] This device integrates cooling and heating functions, replacing the existing separate heat dissipation and preheating components, reducing the space occupied by parts, and meeting the requirements of lightweight and miniaturized stage lights. At the same time, by controlling the input module to read the light source temperature in real time and dynamically switch between cooling and heating modes, it can avoid damage to the light source and components, shorten lifespan, or decrease in luminous flux caused by high temperatures, and solve the problem of damage to the light source caused by forced start-up in extremely low temperature environments. It effectively extends the life of the equipment and improves the adaptability, operational stability, and safety of stage lights in complex environments.

[0010] Preferably, the device further includes a temperature sensor for measuring temperature, the temperature sensor transmitting temperature data to the control input module.

[0011] Preferably, the hot / cold mode conversion module includes a second transistor and a relay, wherein the base of the second transistor is connected to the drive power output module, the emitter is grounded, and the collector is connected to the input terminal of the relay, for controlling the relay to switch on and off through the base current; the output terminal of the relay is connected to the input terminal of the hot / cold circuit module.

[0012] This module utilizes a combination of a second transistor and a relay to achieve sensitive response to the cooling / heating mode switching commands from the preceding stage. The transistor's current amplification ensures the relay's proper operation. Simultaneously, the relay, acting as an isolation element, effectively separates the preceding control circuit from the following power circuit, preventing voltage fluctuations or interference from the following stage from negatively impacting the preceding signal. This ensures stable transmission of the mode switching signal, guarantees orderly current / voltage transfer during cooling / heating mode switching, and enhances the safety, stability, and control accuracy of the entire device during mode switching. Ultimately, it ensures that the cooling / heating module accurately executes cooling or heating operations according to commands.

[0013] More preferably, the hot / cold mode conversion module further includes: a fifth diode, a base bias resistor, and a pull-down resistor. The fifth diode is connected in reverse parallel across the coil of the relay to suppress the reverse electromotive force and protect the circuit. The two ends of the base bias resistor are connected to the input interface and the base of the second transistor, respectively. One end of the pull-down resistor is grounded, and the other end is connected to the input interface.

[0014] Adding a fifth diode, a base bias resistor, and a pull-down resistor to the hot / cold mode switching module can further optimize circuit performance, enhance the circuit's anti-interference capability and operational stability, and improve the reliability and accuracy of mode switching, providing a solid guarantee for the accurate operation of the subsequent delay switch module and the cooling / heating module.

[0015] Preferably, the device further includes a time-delay switch module for delaying the current / voltage. The time-delay switch module is connected between the hot / cold mode conversion module and the hot / cold circuit module. The time-delay switch module includes a cooling branch and a heating branch connected to the normally open and normally closed terminals of the hot / cold mode conversion module, respectively. The cooling branch and the heating branch each include an RC time-delay circuit, a transistor switching assembly, and a MOSFET power assembly. The transistor switching assembly and the MOSFET power assembly are connected in series and then in parallel with the RC time-delay circuit. The source of the MOSFET power assembly is connected to the normally open or normally closed terminal of the hot / cold mode conversion module, and the drain of the MOSFET power assembly is connected to the input terminal of the hot / cold circuit module.

[0016] The dual-branch design of the delay switch module separates the cooling and heating delays, avoiding interference and allowing for adjustable parameters. The RC delay circuit provides a precise signal, while the series connection of the transistor and MOSFET enables efficient conversion from low to high voltage. The parallel structure ensures delay accuracy and stability, laying the foundation for switching between semiconductor cooling and heating elements.

[0017] Preferably, the delay switch module further includes an auxiliary resistor assembly, which includes a base pull-down resistor and a gate pull-up resistor for the heating branch, and a base pull-down resistor and a gate pull-up resistor for the cooling branch.

[0018] By setting the above circuit in the time delay switch module, it is possible to effectively prevent the positive current from being completely discharged before being directly connected to the reverse current during the switching process between hot and cold circuits, thus playing an auxiliary role.

[0019] Preferably, the RC delay circuit includes an electrolytic capacitor and a current-limiting voltage divider resistor.

[0020] The RC delay circuit uses a 16V-rated, 47μF electrolytic capacitor in combination with a current-limiting voltage divider resistor. This ensures that the charging and discharging delay meets the required delay duration through appropriate capacitance, while also adapting to the circuit's operating voltage with a 16V rating to avoid overvoltage damage. At the same time, the large capacitance of the electrolytic capacitor and the current-limiting voltage divider effect of the resistor work together to ensure delay accuracy and stability, providing reliable timing control for mode switching.

[0021] Preferably, the hot / cold circuit module includes: two MOS transistor strings, each MOS transistor string including two MOS transistors, and the drain of one MOS transistor and the gate of the other MOS transistor are connected to an electrode connection of the cooling / heating chip module. The unused drains of the two MOS transistor strings are connected to the drive power output module. The unused gates of the two MOS transistor strings are grounded. The gates of the two MOS transistors in each MOS transistor string are respectively connected to the normally open terminal and the normally closed terminal of the hot / cold mode conversion module.

[0022] Precise control of the MOSFET's on / off state is achieved in the hot / cold circuit module, enabling power path switching between hot and cold modes; diodes are connected in parallel to absorb the reverse electromotive force, protecting the MOSFET; the overall design improves the response speed and reliability of mode switching, ensuring efficient and stable operation of the semiconductor cooling / heating chip.

[0023] Preferably, the device further includes a mode control power supply, the mode signal output by the control input module is received by the mode control power supply, the mode control power supply is connected to the base of the second transistor, controls the relay to switch and conduct to the hot and cold circuit module, and the mode control power supply supplies power to the common terminal of the relay.

[0024] Preferably, the heating / cooling switching device is located between the light source and the heat dissipation cavity and is placed in close contact with the light source.

[0025] By placing the heating and cooling switching device in conjunction with the light source, precise control can be achieved, enabling rapid adaptation to changes in the light source's temperature, ensuring temperature control efficiency and stability, and ensuring that the stage lighting equipment can operate stably in different environments, thus extending its overall service life.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] The heating / cooling switching device provided by this utility model adopts a modular design, with each component (such as transistors, relays, MOSFETs, RC delay circuits, and auxiliary resistors) working together to achieve low-voltage control of high-voltage, signal isolation, anti-interference, and stable delay control, ensuring the safety and accuracy of mode switching. At the same time, the integrated heating / cooling function saves space inside the lamp and meets the requirements of lightweight design: it avoids damage, light decay, or shortened lifespan of the light source and components caused by high temperatures through cooling, and can also preheat in low-temperature environments to ensure normal start-up of the light source, accurately adapting to different environmental temperature requirements; ultimately, it significantly improves the adaptability, operational stability, and service life of the stage lamp in complex environments, and broadens its application scenarios. Attached Figure Description

[0028] Figure 1 A schematic diagram of the stage lamp structure provided by this utility model.

[0029] Figure 2 An exploded view of the stage lamp structure provided by this utility model.

[0030] Figure 3 A schematic diagram of the bottom structure of the stage light body provided by this utility model.

[0031] Figure 4 A schematic diagram of the device structure provided by this utility model.

[0032] Figure 5 This is a schematic diagram of the hot / cold mode conversion module provided by this utility model.

[0033] Figure 6 A schematic diagram of the cooling branch of the time delay switch module provided by this utility model.

[0034] Figure 7 A schematic diagram of the heating branch of the time-delay switch module provided by this utility model.

[0035] Figure 8 A schematic diagram of the hot and cold circuit module provided by this utility model.

[0036] Figure descriptions: Second transistor Q2; Relay K5; Fifth diode D5; Base bias resistor R6; Pull-down resistor R7; First base pull-down resistor R4; Second base pull-down resistor R5; First gate pull-up resistor R2; Third base pull-down resistor R11; Fourth base pull-down resistor R12; Second gate pull-up resistor R8; Lamp holder 1; Support frame 2; Base housing 3; Heat dissipation cavity 4; Control board 5; Light source 6; Cooling / heating switching device 7. Detailed Implementation

[0037] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] Example 1

[0039] like Figure 1-3 As shown, this embodiment provides a stage light with adjustable temperature, including: a lamp head 1, a support frame 2 and a base housing 3. The lamp head 1 is mounted on the support frame 2. The bottom of the lamp head 1 is provided with a heat dissipation cavity 4, and the inside is provided with a control board 5 and a light source 6. The bottom of the support frame 2 is connected to the base housing 3.

[0040] The stage lights also include a hot / cold switching device, which is integrated into the control panel 5, such as... Figure 4 As shown, the device includes: a control input module, a drive power output module, a cold / hot mode conversion module, a cold / hot circuit module, and a cooling / heating element module connected in sequence.

[0041] The control input module reads temperature data through control signals and determines whether to output a cooling or heating mode signal based on the temperature level. This signal is then sent to the cooling / heating mode conversion module. Simultaneously, the module outputs operating parameters to the drive power output module for processing. After processing, the drive power output module outputs the corresponding current / voltage to the cooling / heating mode conversion module. The cooling / heating mode conversion module switches between cooling and heating modes based on the mode signal. Then, the cooling / heating circuit module activates the corresponding components based on the switching of the cooling / heating mode conversion module, enabling them to perform cooling / heating operations. Finally, the cooling / heating element module adjusts the intensity of cooling / heating based on the corresponding output current / voltage, thereby ensuring that the temperature inside the stage light cavity remains within the normal operating range.

[0042] By integrating a cooling and heating switching device into the stage lighting fixture, the cooling and heating functions are integrated into one, replacing the existing separate heat dissipation and preheating components. This reduces the space occupied by parts and meets the requirements for lightweight and miniaturized stage lighting. At the same time, by controlling the input module to read the light source temperature in real time and dynamically switch between cooling and heating modes, it can avoid damage to the light source and components, shorten lifespan, or decrease in luminous flux caused by high temperatures. It can also solve the problem of damage to the light source caused by forced start-up in extremely low temperature environments, effectively extending the equipment lifespan and improving the adaptability, operational stability, and safety of the stage lighting in complex environments.

[0043] Preferably, the device further includes a temperature sensor for measuring temperature, the temperature sensor transmitting temperature data to the control input module.

[0044] Preferably, such as Figure 5 As shown, the hot / cold mode conversion module includes a second transistor Q2 and a relay K5. The base of the second transistor Q2 is connected to the control input module, the emitter is grounded, and the collector is connected to the input terminal of the relay K5, which is used to control the relay to open or close through the base current. In this embodiment, it is connected to pin 8 of the relay K5. The normally open and normally closed terminals of the relay K5 are connected to the input terminal of the hot / cold circuit module.

[0045] Preferably, the device further includes a mode control power supply, the mode signal output by the control input module is received by the mode control power supply, the mode control power supply is connected to the base of the second transistor Q2, controls the relay K5 to switch and conduct to the hot and cold circuit module, and the mode control power supply supplies power to the common terminal of the relay K5.

[0046] In this module, by combining the second transistor Q2 with the relay K5, a sensitive response to the cooling / heating mode switching command from the previous stage can be achieved. The current amplification effect of the transistor ensures the normal operation of the relay. At the same time, the relay K5, as an isolation element, can effectively separate the previous stage control circuit from the subsequent stage power circuit, preventing voltage fluctuations or interference from the subsequent stage from affecting the previous stage signal. This ensures stable transmission of the mode switching signal. Furthermore, its output is connected to a delay switch module, which can safely and stably transmit the mode switching signal to the next stage, providing a reliable trigger for subsequent delay control. This ensures the orderly transmission of current / voltage during the cooling / heating mode switching process, improving the safety, stability, and control accuracy of the entire device during mode switching. Ultimately, this ensures that the cooling / heating module accurately executes cooling or heating operations according to the command.

[0047] More preferably, such as Figure 5 As shown, the hot / cold mode conversion module also includes: a fifth diode D5, a base bias resistor R6, and a pull-down resistor R7. The fifth diode D5 is connected in reverse parallel across the coil of the relay K5 to suppress the reverse electromotive force and protect the circuit. The two ends of the base bias resistor R6 are connected to the input interface and the base of the second transistor Q2, respectively. One end of the pull-down resistor R7 is grounded, and the other end is connected to the input interface.

[0048] Adding a fifth diode D5, a base bias resistor R6, and a pull-down resistor R7 to the hot / cold mode switching module can further optimize circuit performance, enhance the circuit's anti-interference capability and operational stability, and improve the reliability and accuracy of mode switching, providing a solid guarantee for the accurate operation of the subsequent delay switch module and the cooling / heating module.

[0049] Specifically, in the hot / cold mode switching module, for the high-level condition (i.e., cooling mode): when the control signal is given at a high level, the second transistor Q2 operates, the relay K5 is activated, 5V and 5V_2 are turned on, and then the signal is given to the delay switch module; for the low-level condition (i.e., heating mode): when the control signal is given at a low level, the second transistor Q2 does not operate, the relay K5 is stopped, 5V and 5V_1 are turned on, and the signal is given to the delay switch module.

[0050] Preferably, such as Figure 4 , Figure 6 and Figure 7 As shown, the device further includes a time-delay switch module for delaying current / voltage. The time-delay switch module is connected between the hot / cold mode conversion module and the hot / cold circuit module. The time-delay switch module includes a cooling branch and a heating branch connected to the normally open and normally closed terminals of the hot / cold mode conversion module, respectively. The cooling branch and the heating branch each include an RC time-delay circuit, a transistor switching assembly, and a MOSFET power assembly. The transistor switching assembly and the MOSFET power assembly are connected in series and then in parallel with the RC time-delay circuit. The source of the MOSFET power assembly is connected to the normally open or normally closed terminal of the hot / cold mode conversion module, and the drain of the MOSFET power assembly is connected to the input terminal of the hot / cold circuit module.

[0051] Preferably, the RC delay circuit includes an electrolytic capacitor and a current-limiting voltage divider resistor, wherein the electrolytic capacitor has a withstand voltage of 16V and a capacitance of 47μF.

[0052] The RC delay circuit uses a 16V-rated, 47μF electrolytic capacitor in combination with a current-limiting voltage divider resistor. This ensures that the charging and discharging delay meets the required delay duration through appropriate capacitance, while also adapting to the circuit's operating voltage with a 16V rating to avoid overvoltage damage. At the same time, the large capacitance of the electrolytic capacitor and the current-limiting voltage divider effect of the resistor work together to ensure delay accuracy and stability, providing reliable timing control for mode switching.

[0053] Specifically, such as Figure 6 As shown, in the cooling branch, resistor R9 and capacitor C2 are connected in series to form a delay circuit. MOSFET Q4 and transistor Q5 are connected in series and then in parallel with the R9C2 delay circuit to form the cooling branch. For the high-level case (i.e., cooling mode): R9 and C2 delay the signal. The delay time is adjusted by the value of R9 and C2. After the delay ends, Q5 and Q4 are turned on, 5_2V and VDD_C are turned on, and then the signal is sent to the next stage of the hot and cold circuit module.

[0054] like Figure 7As shown, in the heating branch, resistor R1 and capacitor C1 are connected in series to form a delay circuit. MOSFET Q1 and transistor Q3 are connected in series and then in parallel with the R1C1 delay circuit to form the heating branch. In the low-level case (i.e. heating mode): R1 and C1 delay the signal. The delay time is adjusted by the value of R1 and C1. After the delay ends, Q3 and Q1 are turned on, 5_1V and VDD_H are turned on, and then the signal is sent to the next stage of the hot and cold circuit module.

[0055] The dual-branch design of the time-delay switch module separates the cooling and heating delays, avoiding interference and allowing for adjustable parameters. The RC delay circuit provides a precise signal, while the series connection of the transistor and MOSFET enables efficient conversion from low-voltage to high-voltage signals. The parallel structure ensures delay accuracy and stability, laying the foundation for the device's cooling and heating control switching.

[0056] Preferably, such as Figure 6 and Figure 7 As shown, the delay switch module also includes an auxiliary resistor assembly, which includes a first base pull-down resistor R4 and a second base pull-down resistor R5, a first gate pull-up resistor R2 for the heating branch, and a third base pull-down resistor R11 and a fourth base pull-down resistor R12, a second gate pull-up resistor R8 for the cooling branch.

[0057] By setting the above circuit in the time delay switch module, it is possible to effectively prevent the positive current from being completely discharged before being directly connected to the reverse current during the switching process between hot and cold circuits, thus playing an auxiliary role.

[0058] Preferably, such as Figure 8 As shown, the hot / cold circuit module includes: two MOS transistor strings, each MOS transistor string including two MOS transistors, and the drain of one MOS transistor and the gate of the other MOS transistor are connected to an electrode connection of the cooling / heating chip module. The unused drains of the two MOS transistor strings are connected to the drive power output module. The unused gates of the two MOS transistor strings are grounded. The gates of the two MOS transistors in each MOS transistor string are respectively connected to the normally open terminal and normally closed terminal of the hot / cold mode conversion module.

[0059] The hot and cold circuit module achieves precise control of the MOSFET's on / off state, enabling power path switching between hot and cold modes; the diodes are connected in parallel to absorb the reverse electromotive force, protecting the MOSFET; the overall design improves the response speed and reliability of mode switching, ensuring efficient and stable operation of the cooling / heating element.

[0060] Preferably, the MOSFET has a rated current of 40A and a withstand voltage of 100V, and is used for on / off control of high-current power paths.

[0061] The MOSFET is selected with a rated current of 40A and a withstand voltage of 100V. It can reliably carry the high current power path switching control when the TEC cooling / heating chip is working, meet the power requirements when switching between cooling and heating modes, and the high withstand voltage can resist voltage fluctuations and spikes in the circuit, ensure stable current / voltage transmission, avoid overcurrent or overvoltage damage, and improve the durability and safety of the module.

[0062] Specifically, in Figure 8 In the diagram, there are four MOSFETs, including Q6, Q7, Q8, and Q9, and four diodes, including D6, D7, D8, and D9. Specifically, D6 and Q6 are connected in parallel, D7 and Q7 are connected in parallel, D8 and Q8 are connected in parallel, and D9 and Q9 are connected in parallel.

[0063] And the cooling / heating module includes a TEC cooling / heating element, such as... Figure 3 As shown, the cooling / heating switching device is located between the light source 6 and the heat dissipation cavity 4 and is placed in close contact with the light source 6, so that the TEC cooling / heating element can precisely control the temperature of the core area of ​​the light source.

[0064] For the high-level condition (i.e., in cooling mode): Q6 and Q9 are turned on. At this time, the power polarity of the TEC cooling / heating element is in the 1+ and 2- state, and the TEC cooling / heating element turns on the cooling mode.

[0065] For low-level conditions (i.e. heating mode): Q7 and Q8 are turned on, and the power polarity of the TEC cooling / heating element is in the 2+ and 1- state, and the TEC cooling / heating element turns on the heating mode;

[0066] This switching method offers rapid response and precise control, quickly adapting to changes in lighting temperature, ensuring temperature control efficiency and stability, guaranteeing stable operation of stage lights in different environments, and extending overall lifespan.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A temperature adjustable stage light, comprising: The lamp head, support frame, and base housing are provided. The lamp head is mounted on the support frame. The bottom of the lamp head is provided with a heat dissipation cavity and contains a control board and a light source. The bottom of the support frame is connected to the base housing. The stage light is characterized in that it further includes a heating / cooling switching device, which includes: a control input module, a drive power output module, a heating / cooling mode conversion module, a heating / cooling circuit module, and a cooling / heating element module connected in sequence. The control input module reads temperature data, compares it with a preset temperature, and outputs a mode signal to control cooling or heating, which is then sent to the cooling / heating mode conversion module. Simultaneously, it outputs operating parameters to the drive power output module for processing. The drive power output module outputs the corresponding current / voltage to the cooling / heating circuit module. The cooling / heating mode conversion module switches between cooling and heating according to the mode signal and conducts the corresponding current / voltage to the corresponding components of the cooling / heating circuit module, thereby adjusting the cooling / heating intensity of the cooling / heating module to ensure that the temperature inside the stage light cavity remains within the normal operating range.

2. The temperature-adjustable stage light according to claim 1, wherein, The device further includes a temperature sensor for measuring temperature, which transmits temperature data to the control input module.

3. A temperature adjustable stage light according to claim 2, wherein, The hot / cold mode switching module includes a second transistor and a relay. The base of the second transistor is connected to the control input module, the emitter is grounded, and the collector is connected to the input terminal of the relay, which is used to control the relay to switch on and off through the base current. The normally open and normally closed terminals of the relay are connected to the input terminal of the hot / cold circuit module.

4. A temperature adjustable stage light according to claim 3, wherein, The hot / cold mode switching module also includes: a fifth diode, a base bias resistor, and a pull-down resistor. The fifth diode is connected in reverse parallel across the coil of the relay to suppress the reverse electromotive force and protect the circuit. The two ends of the base bias resistor are connected to the input interface and the base of the second transistor, respectively. One end of the pull-down resistor is grounded, and the other end is connected to the input interface.

5. The temperature-adjustable stage light according to claim 1, wherein, The device further includes a time-delay switch module for delaying current / voltage. The time-delay switch module is connected between the hot / cold mode conversion module and the hot / cold circuit module. The time-delay switch module includes a cooling branch and a heating branch connected to the normally open and normally closed terminals of the hot / cold mode conversion module, respectively. The cooling branch and the heating branch each include an RC time-delay circuit, a transistor switching assembly, and a MOSFET power assembly. The transistor switching assembly and the MOSFET power assembly are connected in series and then in parallel with the RC time-delay circuit. The source of the MOSFET power assembly is connected to the normally open or normally closed terminal of the hot / cold mode conversion module, and the drain of the MOSFET power assembly is connected to the input terminal of the hot / cold circuit module.

6. A temperature adjustable stage light according to claim 5, wherein, The delay switch module also includes an auxiliary resistor assembly, which includes a base pull-down resistor and a gate pull-up resistor for the heating branch, and a base pull-down resistor and a gate pull-up resistor for the cooling branch.

7. The temperature-adjustable stage light according to claim 5, wherein, The RC delay circuit includes an electrolytic capacitor and a current-limiting voltage divider resistor connected in series.

8. The temperature-adjustable stage light according to claim 1, wherein, The hot / cold circuit module includes two MOS transistor strings, each string containing two MOS transistors. The drain of one MOS transistor and the gate of the other MOS transistor are connected to an electrode of the cooling / heating module. The unused drains of the two MOS transistor strings are connected to the drive power output module. The unused gates of the two MOS transistor strings are grounded. The gates of the two MOS transistors in each string are connected to the normally open and normally closed terminals of the hot / cold mode conversion module, respectively.

9. A stage light with adjustable temperature according to claim 3, characterized in that, The device also includes a mode control power supply. The mode signal output by the control input module is received by the mode control power supply. The mode control power supply is connected to the base of the second transistor, controls the relay to switch and conduct to the hot and cold circuit module, and the mode control power supply supplies power to the common terminal of the relay.

10. The temperature-adjustable stage light according to claim 1, wherein, The heating / cooling switching device is located between the light source and the heat dissipation cavity and is placed in close contact with the light source.

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