Projector heat dissipation control methods, microcontroller unit, storage medium and projector

Abstract

This invention discloses a heat dissipation control method, a microcontroller unit, a storage medium, and a projector. The projector includes a first temperature sensor mounted on an LCD screen, a second temperature sensor mounted on a heat sink fin, a third temperature sensor mounted on an LED backplate, a first fan located outside the optical engine, and a second fan located inside the optical engine. The method includes the steps of: controlling the first, second, and third temperature sensors to detect the temperatures of the LCD screen, the heat sink fins, and the LED backplate, respectively; and dynamically adjusting the speeds of the first and second fans based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal. This invention achieves precise monitoring and control of the temperature of different parts inside the projector, can precisely control the fan speed to achieve optimal heat dissipation, achieve higher heat dissipation efficiency, reduce noise, and has a simple and lower cost.

Description

Technical Field

[0001] This invention relates to the field of projector technology, and more particularly to a heat dissipation control method, microcontroller unit, storage medium, and projector for a projector. Background Technology

[0002] In modern electronic devices, especially high-precision opto-mechatronic products such as projectors, heat dissipation technology is crucial. When a projector is working, its light source, computing chip, graphics processor, and other components generate a lot of heat. If this heat is not dissipated in time, it will seriously affect the projector's performance and lifespan.

[0003] Currently, projectors primarily employ cooling technologies including air cooling, water cooling, and solid-state thermal conductivity. Air cooling uses built-in fans for heat dissipation, but suffers from fan noise and the potential for unusual noises due to dust accumulation over time. Water cooling is rarely used in projectors due to its large size and high maintenance costs. Solid-state thermal conductivity technologies, such as graphite heat dissipation, copper pipe heat dissipation, and finned heat dissipation, are lower in cost but generally less effective. Some high-end projectors utilize specialized cooling designs, such as the PAS ventilation system and dual-channel 3D cooling technology. These technologies improve cooling efficiency by optimizing airflow paths and fan layout. However, these designs are often complex and expensive, making them difficult to adopt across all types of projectors.

[0004] Problems and shortcomings of existing technologies: Insufficient heat dissipation efficiency: Traditional heat dissipation technologies often cannot meet the heat dissipation requirements of high-power projectors, leading to overheating of the equipment and affecting performance and lifespan; Noise problems: The fans in the air-cooled heat dissipation system will generate a lot of noise when running at high speed, affecting the user experience; Cost and complexity: Although special heat dissipation designs are effective, their high cost and complex design limit their application in ordinary consumer-grade projectors.

[0005] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a heat dissipation control method, a microcontroller unit, a storage medium, and a projector for a projector, so as to solve the problems of insufficient heat dissipation efficiency, high noise, high cost, and complex solutions in the existing heat dissipation schemes of projectors.

[0007] The technical solution of the present invention is as follows:

[0008] In a first aspect, the present invention provides a heat dissipation control method for a projector, the projector including a first temperature sensor disposed on an LCD screen, a second temperature sensor disposed on a heat sink fin, a third temperature sensor disposed on an LED backplate, a first fan disposed outside the optical engine, and a second fan disposed inside the optical engine, the method including the following steps:

[0009] The first temperature sensor, the second temperature sensor, and the third temperature sensor are controlled to detect the temperature of the LCD screen, the temperature of the heat sink fins, and the temperature of the LED backplate of the projector, respectively, so as to obtain the LCD screen temperature signal, the heat sink fins temperature signal, and the LED backplate temperature signal.

[0010] The speeds of the first fan and the second fan are dynamically adjusted based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively.

[0011] A further provision of the present invention includes, in particular, the step of dynamically adjusting the speeds of the first fan and the second fan based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively, comprising:

[0012] When any one of the temperature signals of the LCD screen, the heat sink fins, and the LED backplate reaches a preset temperature threshold, the speed of the first fan and the second fan is increased simultaneously.

[0013] When the temperature signals of the LCD screen, the heat sink fins, and the LED backplate all reach the preset temperature threshold, the speeds of the first fan and the second fan are reduced.

[0014] In a further embodiment of the present invention, the entry temperature threshold ranges for the heat dissipation fin temperature signal include 0 degrees, 39 degrees, 41 degrees, 42 degrees, 44 degrees, 46 degrees, 47 degrees, and 50 degrees; the exit temperature threshold ranges for the heat dissipation fin temperature signal include -10 degrees, 34 degrees, 36 degrees, 38 degrees, 41 degrees, 42 degrees, and 45 degrees.

[0015] The entry temperature threshold ranges for the LCD screen temperature signal include 0 degrees, 44 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 49 degrees, 50 degrees, and 55 degrees; the exit temperature threshold ranges for the LCD screen temperature signal include -10 degrees, 39 degrees, 40 degrees, 41 degrees, 44 degrees, 45 degrees, and 47 degrees.

[0016] The entry temperature threshold ranges for the LED backplane temperature signal include 0 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, 66 degrees, and 69 degrees; the exit temperature threshold ranges for the LED backplane temperature signal include -10 degrees, 55 degrees, 56 degrees, 56 degrees, 57 degrees, 58 degrees, and 61 degrees.

[0017] The speed increase of the first fan and the second fan is controlled according to the entry temperature threshold of the LCD screen temperature signal, the heat sink temperature signal and the LED backplate temperature signal;

[0018] The reduction in the rotational speed of the first fan and the second fan is controlled based on the exit temperature threshold of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal.

[0019] In a further embodiment of the present invention, when the entry temperature threshold of any one of the LCD screen temperature signal, the heat sink temperature signal, and the LED backplate temperature signal reaches the upper limit value, the projector is controlled to shut down and a shutdown prompt is displayed.

[0020] In a further embodiment of the present invention, in the step of dynamically adjusting the speed of the first fan and the second fan according to the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplate temperature signal respectively, the speed of the first fan and the second fan is adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

[0021] In a further embodiment of the present invention, the speed control signal gear combinations of the first fan and the second fan include 40%+80%, 45%+90%, 50%+100%, 60%+100%, 70%+100%, 80%+100%, and 90%+100%; the speed control signal gears of the first fan and the second fan increase sequentially as the temperature threshold increases.

[0022] In a further embodiment of the present invention, the first fan is an axial flow fan and the second fan is a circulating fan.

[0023] Secondly, the present invention also provides a microcontroller unit, which includes a memory and a processor, wherein a computer program is disposed on the memory, and the processor is used to implement the heat dissipation control method of the projector as described above when executing the computer program.

[0024] Thirdly, the present invention also provides a storage medium having a computer program stored thereon, which, when executed by a processor, is used to implement the heat dissipation control method for a projector as described above.

[0025] Fourthly, the present invention also provides a projector, which includes an optical engine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED screen, heat sink fins, a first fan, a second fan, and a microcontroller unit; the first temperature sensor is disposed on the LCD screen and connected to the microcontroller unit; the second temperature sensor is disposed on the heat sink fins and connected to the microcontroller unit; the third temperature sensor is disposed on the LED screen and connected to the microcontroller unit; the first fan is disposed outside the optical engine and connected to the microcontroller unit, and the second fan is disposed inside the optical engine and connected to the microcontroller unit; the microcontroller unit is used to dynamically adjust the speed of the first fan and the second fan according to the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively.

[0026] The present invention provides a heat dissipation control method, a microcontroller unit, a storage medium, and a projector. The projector includes a first temperature sensor disposed on an LCD screen, a second temperature sensor disposed on a heat sink fin, a third temperature sensor disposed on an LED backplate, a first fan disposed outside the optical engine, and a second fan disposed inside the optical engine. The method includes the steps of: controlling the first temperature sensor, the second temperature sensor, and the third temperature sensor to detect the temperature of the projector's LCD screen, the temperature of the heat sink fin, and the temperature of the LED backplate respectively to obtain LCD screen temperature signals, heat sink fin temperature signals, and LED backplate temperature signals; and dynamically adjusting the rotational speeds of the first fan and the second fan based on the LCD screen temperature signals, the heat sink fin temperature signals, and the LED backplate temperature signals. This invention employs three temperature sensors to monitor the temperatures of the LCD screen inside the optical engine, the LED screen outside the optical engine, and the heat sink fins in real time. Based on the detected temperature signals of the LCD screen, the heat sink fins, and the LED backplate, the speeds of the first fan outside the optical engine and the second fan inside the optical engine can be dynamically adjusted. This enables precise monitoring and control of the temperature of different parts inside the projector, accurately controlling the fan speed to achieve optimal heat dissipation. Consequently, it achieves higher heat dissipation efficiency, reduces noise, and the solution is simpler and lower in cost than existing technologies. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a flowchart illustrating the heat dissipation control method for the projector in this invention.

[0029] Figure 2 This is a block diagram illustrating the principle of the microcontroller unit, temperature sensor, and fan in this invention.

[0030] Figure 3 This is a circuit diagram of the first temperature sensor, the second temperature sensor, the third temperature sensor, and the microcontroller unit in this invention. Detailed Implementation

[0031] This invention provides a heat dissipation control method for a projector, a microcontroller unit, a storage medium, and a projector. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0032] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of the present invention involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only 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.

[0033] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements present. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any of the units and all combinations thereof of one or more associatedly listed items.

[0034] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0035] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] The inventors discovered that some manufacturers use intelligent cooling systems that automatically increase fan speed to cool the device when the internal temperature is too high, based on temperature monitoring principles. However, these systems cannot precisely control fan speed for optimal cooling. Current technology lacks precise monitoring and control of the temperature in different parts of the projector, resulting in unsatisfactory heat dissipation.

[0037] Please also refer to Figures 1 to 3 The present invention provides a preferred embodiment of a heat dissipation control method for a projector.

[0038] In some embodiments, such as Figure 1 As shown, the present invention provides a heat dissipation control method for a projector. The projector includes a first temperature sensor disposed on an LCD screen, a second temperature sensor disposed on a heat sink fin, a third temperature sensor disposed on an LED backplate, a first fan disposed outside the optical engine, and a second fan disposed inside the optical engine. The method includes the following steps:

[0039] S100: Control the first temperature sensor, the second temperature sensor and the third temperature sensor to detect the temperature of the LCD screen, the temperature of the heat sink fins and the temperature of the LED backplate of the projector respectively to obtain the LCD screen temperature signal, the heat sink fins temperature signal and the LED backplate temperature signal.

[0040] Specifically, please combine 2 with Figure 3 The projector includes an optical engine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED screen, heat sink fins, a first fan, a second fan, and a microcontroller unit. The first temperature sensor is mounted on the LCD screen and connected to the microcontroller unit; the second temperature sensor is mounted on the heat sink fins and connected to the microcontroller unit; the third temperature sensor is mounted on the LED screen and connected to the microcontroller unit; the first fan is located outside the optical engine and connected to the microcontroller unit; and the second fan is located inside the optical engine and connected to the microcontroller unit. The first fan is an axial flow fan, a type of power machinery based on axial flow, mainly used in ventilation, air conditioning, and cooling fields. It generates airflow by converting the fluid dynamics and dynamic pressure energy generated by the impeller into static pressure energy. The second fan is a circulating fan, whose main function is to increase the indoor airflow speed by drawing in air and accelerating its expulsion.

[0041] The LCD screen and the first temperature sensor are located inside the optomechanical system, while the LED backplate is located outside the system. The heat sink fins are used to conduct heat from inside the optomechanical system to the outside. The second and third temperature sensors are also located outside the system. The microcontroller unit can control the operation of the first, second, and third temperature sensors, thereby enabling the detection of the temperatures of the LCD screen, the heat sink fins, and the LED backplate—that is, the detection of temperatures inside the optomechanical system, the heat sink fins, and the outside of the system.

[0042] S200: The speeds of the first fan and the second fan are dynamically adjusted according to the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively.

[0043] Specifically, the microcontroller obtains the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal through the first temperature sensor, the second temperature sensor, and the third temperature sensor. It can then control the speed of the first fan and the second fan based on the temperatures of the LCD screen, the LED screen, and the heat sink fins. For example, when the temperature inside the optical engine is high, the speed of the internal fan (second fan) is increased; when the external ambient temperature is high, the speed of the external fan (first fan) is increased.

[0044] In the above technical solution, this invention, by setting three sets of temperature sensors inside the optical engine, on the heat sink fins, and outside the optical engine, can dynamically adjust the fan speeds inside and outside the optical engine based on the temperature at different locations on the projector and the structure of the optical engine itself. In this way, this invention can accurately monitor the temperature conditions inside and outside the optical engine and precisely adjust the fan speeds accordingly. Compared to existing methods that directly increase fan speed when a temperature rise is detected, this not only improves heat dissipation efficiency (existing fan cooling methods are inefficient under high brightness or high power conditions) and cooling effect, but also reduces noise and the risk of performance degradation and damage to the projector due to overheating. Furthermore, this invention is relatively simple in structural design, low in cost, and applicable to various types of projectors, showing broad application prospects.

[0045] In some embodiments, the step of dynamically adjusting the speeds of the first fan and the second fan based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal specifically includes:

[0046] S210. When any one of the temperature values ​​of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal reaches a preset temperature threshold, the speed of the first fan and the second fan is increased simultaneously.

[0047] Specifically, the entry temperature threshold levels for the LCD screen temperature signal include 0°C, 44°C, 46°C, 47°C, 48°C, 49°C, 50°C, and 55°C; the entry temperature threshold levels for the heat sink fin temperature signal include 0°C, 39°C, 41°C, 42°C, 44°C, 46°C, 47°C, and 50°C; and the entry temperature threshold levels for the LED backplane temperature signal include 0°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, and 69°C. The speed increase of the first fan and the second fan is controlled based on the entry temperature threshold levels of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplane temperature signal.

[0048] When the temperature of any one of the following locations—the LCD screen, the heat sink, or the LED backplate—reaches a preset temperature threshold, the speeds of the first and second fans are increased by one level. For example, when the LCD screen temperature reaches 44 degrees Celsius, the speeds of the first and second fans are increased; similarly, when the heat sink temperature reaches 42 degrees Celsius, the speeds of the first and second fans are increased; and when the LED backplate temperature reaches 61 degrees Celsius, the speeds of the first and second fans are increased. In other words, whenever any of the LCD screen temperature, heat sink temperature, or LED backplate temperature reaches a preset temperature threshold, the speeds of the first and second fans are increased.

[0049] S220. When the temperature signals of the LCD screen, the heat sink fins, and the LED backplate all reach the preset temperature threshold, reduce the speed of the first fan and the second fan.

[0050] Specifically, the exit temperature threshold ranges for the heat sink temperature signal include -10 degrees, 34 degrees, 36 degrees, 38 degrees, 41 degrees, 42 degrees, and 45 degrees; the exit temperature threshold ranges for the LCD screen temperature signal include -10 degrees, 39 degrees, 40 degrees, 41 degrees, 44 degrees, 45 degrees, and 47 degrees; and the exit temperature threshold ranges for the LED backplane temperature signal include -10 degrees, 55 degrees, 56 degrees, 56 degrees, 57 degrees, 58 degrees, and 61 degrees. The speed reduction of the first fan and the second fan is controlled based on the exit temperature thresholds of the LCD screen temperature signal, the heat sink temperature signal, and the LED backplane temperature signal.

[0051] The first and second fans will only reduce their speeds when the temperatures of the LCD screen, heat sink fins, and LED backplate all reach the exit temperature threshold at the same fan speed setting. For example, when the fans are at the third speed setting, the LCD screen temperature might be 46 degrees Celsius, the heat sink temperature might be 41 degrees Celsius, or the LED backplate temperature might be 62 degrees Celsius. In this case, the speed of the first and second fans will only decrease when the LCD screen temperature reaches 40 degrees Celsius, the heat sink temperature reaches 36 degrees Celsius, and the LED backplate temperature reaches 56 degrees Celsius. In other words, as long as the temperature of any one of the LCD screen, heat sink fins, or LED backplate does not reach the exit temperature threshold, the speed of the first and second fans will not decrease, thus ensuring the projector's heat dissipation effect.

[0052] In some embodiments, when the entry temperature threshold of one of the LCD screen temperature signal, the heat sink temperature signal, and the LED backplate temperature signal reaches the upper limit value, the projector is controlled to turn off and a shutdown prompt is issued.

[0053] Specifically, the LCD screen, the heat sink, and the LED backplate have temperature limits because the cooling effect of the first and second fans is limited. Therefore, once the temperature of any one of these components reaches its limit, the projector will issue a shutdown reminder and then shut down to prevent damage from overheating and avoid safety accidents. Additionally, when the entry temperature threshold of the LCD screen, heat sink, and LED backplate reaches its maximum (i.e., when the speed of the first and second fans reaches their maximum), an alarm will be triggered.

[0054] In some embodiments, in the step of dynamically adjusting the speed of the first fan and the second fan according to the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplate temperature signal respectively, the speed of the first fan and the second fan is adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

[0055] Specifically, the speed control signal gear combinations for the first fan and the second fan include 40%+80%, 45%+90%, 50%+100%, 60%+100%, 70%+100%, 80%+100%, and 90%+100%; the speed control signal gears for the first fan and the second fan increase progressively as the temperature threshold increases.

[0056] When the first fan and the second fan are in the first gear, the temperature of the LCD screen, the heat sink, and the LED backplate reaches the temperature threshold of the first gear. For example, the temperature of the heat sink is 0 degrees Celsius, or the temperature of the LED screen is detected as 0 degrees Celsius. At this time, the duty cycle combination of the speed control signals of the first fan and the second fan is 40% + 80%. When the temperature of the LCD screen, the heat sink, and the LED backplate reaches the temperature threshold of the second gear, the duty cycle combination of the speed control signals of the first fan and the second fan is 45% + 90%. As the gear increases, the speed also gradually increases, so as to accurately adjust the speed of the first fan and the second fan according to the internal and external temperatures of the optical engine, thereby improving heat dissipation efficiency and reducing the noise generated by the fan operation.

[0057] In some embodiments, the present invention also provides a microcontroller unit, which includes a memory and a processor, wherein a computer program is disposed on the memory, and the processor is configured to implement the steps of the heat dissipation control method for a projector when executing the computer program:

[0058] S100: Control the first temperature sensor, the second temperature sensor, and the third temperature sensor to detect the temperature of the LCD screen, the temperature of the heat sink fins, and the temperature of the LED backplate of the projector, respectively, to obtain the LCD screen temperature signal, the heat sink fins temperature signal, and the LED backplate temperature signal; as described in an embodiment of a heat dissipation control method for a projector, and will not be repeated here.

[0059] S200: The speeds of the first fan and the second fan are dynamically adjusted according to the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively. This is specifically described in an embodiment of a projector's heat dissipation control method, and will not be repeated here.

[0060] In some embodiments, the present invention also provides a storage medium storing a computer program thereon, which, when executed by a processor, is used to implement the steps in the heat dissipation control method for a projector:

[0061] S100: Control the first temperature sensor, the second temperature sensor, and the third temperature sensor to detect the temperature of the LCD screen, the temperature of the heat sink fins, and the temperature of the LED backplate of the projector, respectively, to obtain the LCD screen temperature signal, the heat sink fins temperature signal, and the LED backplate temperature signal; as described in an embodiment of a heat dissipation control method for a projector, and will not be repeated here.

[0062] S200: The speeds of the first fan and the second fan are dynamically adjusted according to the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively. This is specifically described in an embodiment of a projector's heat dissipation control method, and will not be repeated here.

[0063] In some embodiments, please refer to Figure 2 and Figure 3 The present invention also provides a projector, comprising an optical engine, a first temperature sensor LCD_NTC, a second temperature sensor EVR_NTC, a third temperature sensor LED_NTC, an LCD screen, an LED screen, heat sink fins, a first fan, a second fan, and a microcontroller unit (MCU); the first temperature sensor LCD_NTC is disposed on the LCD screen and connected to the MCU; the second temperature sensor EVR_NTC is disposed on the heat sink fins and connected to the MCU; the third temperature sensor LED_NTC is disposed on the LED screen and connected to the MCU; the first fan is disposed outside the optical engine and connected to the MCU, and the second fan is disposed inside the optical engine and connected to the MCU; the MCU is used to dynamically adjust the speed of the first fan and the second fan according to the LCD screen temperature signal LCD_NTC IC, the heat sink temperature signal EVR_NTC IC, and the LED backplane temperature signal LED_NTC IC, respectively.

[0064] Specifically, the first temperature sensor LCD_NTC is an LCD temperature sensor, the second temperature sensor EVR_NTC is an ambient temperature sensor, and the third temperature sensor LED_NTC is an LED backplane temperature signal sensor. Figure 3 In the diagram, 'a' represents the circuit schematic of the third temperature sensor. Figure 3 In the diagram, 'b' represents the circuit schematic of the second temperature sensor. Figure 3 In the diagram, 'c' represents the circuit schematic of the first temperature sensor. Figure 3 In the diagram, 'd' represents the circuit schematic of the microcontroller unit (MCU). The first temperature sensor (LCD_NTC), the second temperature sensor (EVR_NTC), and the third temperature sensor (LED_NTC) are connected to the MCU via an IIC bus. The first fan is an external axial fan of the optical engine, and the second fan is an internal circulating fan of the optical engine. The first and second fans are connected to the MCU via a UART (Universal Asynchronous Receiver / Transmitter).

[0065] The microcontroller unit (MCU) can control the first temperature sensor LCD_NTC, the second temperature sensor EVR_NTC, and the third temperature sensor LED_NTC to detect the temperature of the projector's LCD screen, the heat sink fins, and the LED backplate, respectively, to obtain the LCD screen temperature signal LCD_NTCIC, the heat sink fin temperature signal EVR_NTCIC, and the LED backplate temperature signal LED_NTCIC. Subsequently, the MCU can dynamically adjust the speeds of the first and second fans based on the LCD screen temperature signal LCD_NTCIC, the heat sink temperature signal EVR_NTCIC, and the LED backplate temperature signal LED_NTCIC, respectively. This allows for precise monitoring of the internal and external temperatures of the optical engine and precise adjustment of the fan speeds. Compared to existing methods that directly increase fan speed when a temperature rise is detected, this not only improves heat dissipation efficiency and effectiveness but also reduces noise and minimizes the risk of performance degradation and damage to the projector due to overheating.

[0066] In summary, the heat dissipation control method, microcontroller unit, storage medium, and projector provided by this invention have the following beneficial effects:

[0067] It can accurately monitor the temperature inside and outside the optical engine and precisely adjust the speed of the fans inside and outside the optical engine. Compared with the existing method of directly increasing the fan speed when the temperature rises, it not only has better heat dissipation efficiency and effect, but also reduces the noise when the fan is running at high speed, and reduces the risk of performance degradation and damage to the projector due to overheating.

[0068] Its structural design is relatively simple and its cost is low. It can be applied to various types of projectors and has a wide range of application prospects.

[0069] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heat dissipation control method for a projector, characterized in that, The projector includes a first temperature sensor mounted on the LCD screen, a second temperature sensor mounted on the heat sink fins, a third temperature sensor mounted on the LED backplate, a first fan mounted outside the optical engine, and a second fan mounted inside the optical engine. The method includes the following steps: The first temperature sensor, the second temperature sensor, and the third temperature sensor are controlled to detect the temperature of the LCD screen, the temperature of the heat sink fins, and the temperature of the LED backplate of the projector, respectively, so as to obtain the LCD screen temperature signal, the heat sink fins temperature signal, and the LED backplate temperature signal. The speeds of the first fan and the second fan are dynamically adjusted based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively. The step of dynamically adjusting the speeds of the first fan and the second fan based on the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal specifically includes: When any one of the temperature signals of the LCD screen, the heat sink fins, and the LED backplate reaches a preset temperature threshold, the speed of the first fan and the second fan is increased simultaneously. When the temperature signals of the LCD screen, the heat sink fins, and the LED backplate all reach the preset temperature threshold, the speed of the first fan and the second fan is reduced. The entry temperature threshold ranges for the heat dissipation fin temperature signal include 0 degrees, 39 degrees, 41 degrees, 42 degrees, 44 degrees, 46 degrees, 47 degrees, and 50 degrees; the exit temperature threshold ranges for the heat dissipation fin temperature signal include -10 degrees, 34 degrees, 36 degrees, 38 degrees, 41 degrees, 42 degrees, and 45 degrees. The entry temperature threshold ranges for the LCD screen temperature signal include 0 degrees, 44 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 49 degrees, 50 degrees, and 55 degrees; the exit temperature threshold ranges for the LCD screen temperature signal include -10 degrees, 39 degrees, 40 degrees, 41 degrees, 44 degrees, 45 degrees, and 47 degrees. The entry temperature threshold ranges for the LED backplane temperature signal include 0 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, 66 degrees, and 69 degrees; the exit temperature threshold ranges for the LED backplane temperature signal include -10 degrees, 55 degrees, 56 degrees, 56 degrees, 57 degrees, 58 degrees, and 61 degrees. The speed increase of the first fan and the second fan is controlled according to the entry temperature threshold of the LCD screen temperature signal, the heat sink temperature signal and the LED backplate temperature signal; The reduction in the rotational speed of the first fan and the second fan is controlled based on the exit temperature threshold of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal.

2. The heat dissipation control method for a projector according to claim 1, characterized in that, When one of the LCD screen temperature signal, the heat sink temperature signal, and the LED backplate temperature signal reaches the upper limit of the temperature threshold, the projector is controlled to turn off and a shutdown prompt is displayed.

3. The heat dissipation control method for a projector according to claim 1, characterized in that, In the step of dynamically adjusting the speed of the first fan and the second fan according to the LCD screen temperature signal, the heat sink temperature signal and the LED backplate temperature signal respectively, the speed of the first fan and the second fan is adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

4. The heat dissipation control method for a projector according to claim 3, characterized in that, The speed control signal gear combinations for the first fan and the second fan include 40%+80%, 45%+90%, 50%+100%, 60%+100%, 70%+100%, 80%+100%, and 90%+100%; the speed control signal gears for the first fan and the second fan increase gradually as the temperature threshold increases.

5. The heat dissipation control method for a projector according to claim 1, characterized in that, The first fan is an axial fan, and the second fan is a circulating fan.

6. A microcontroller unit, characterized in that, The device includes a memory and a processor, wherein the memory is provided with a computer program, and the processor is used to implement the heat dissipation control method of the projector as described in any one of claims 1-5 when executing the computer program.

7. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it is used to implement the heat dissipation control method for the projector as described in any one of claims 1-5.

8. A projector, characterized in that, The device includes an optical engine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED backplate, heat sink fins, a first fan, a second fan, and a microcontroller unit as described in claim 6. The first temperature sensor is disposed on the LCD screen and connected to the microcontroller unit; the second temperature sensor is disposed on the heat sink fins and connected to the microcontroller unit; the third temperature sensor is disposed on the LED backplate and connected to the microcontroller unit; the first fan is disposed outside the optical engine and connected to the microcontroller unit, and the second fan is disposed inside the optical engine and connected to the microcontroller unit; the microcontroller unit is used to dynamically adjust the speeds of the first fan and the second fan according to the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplate temperature signal, respectively.

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