Heat dissipation control method of projector, micro-control unit, storage medium and projector

Abstract

The invention discloses a heat dissipation control method of a projector, a micro-control unit, a storage medium and the projector. The projector comprises a first temperature sensor arranged on the LCD screen, a second temperature sensor arranged on the heat dissipation fins, a third temperature sensor arranged on the LED backboard, a first fan arranged outside the light machine and a second fan arranged inside the light machine. The method comprises the steps that a first temperature sensor, a second temperature sensor and a third temperature sensor are controlled to detect the temperature of an LCD screen, the temperature of heat dissipation fins and the temperature of an LED backboard respectively; and the rotating speed of the first fan and the rotating speed of the second fan are dynamically adjusted according to the LCD screen temperature signal, the cooling fin temperature signal and the LED backboard temperature signal. The temperature of different parts in the projector is accurately monitored and controlled, the rotating speed of the fan can be accurately controlled to achieve the optimal heat dissipation effect, higher heat dissipation efficiency is achieved, noise is reduced, the scheme is simple, and cost is lower.

Description

Technical Field

[0001] The present invention relates to the technical field of projectors, and in particular to a heat dissipation control method of a projector, a micro control unit, a storage medium and a projector. Background Art

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

[0003] At present, the main heat dissipation technologies used in projectors include air cooling, water cooling and solid heat conduction. Air cooling technology achieves heat dissipation through a built-in fan, but there are problems with wind noise and abnormal noise caused by internal dust accumulation after long-term operation; water cooling technology is rarely used in projectors due to its large space occupation and high maintenance cost; solid heat conduction technologies such as graphite heat dissipation, copper tube heat dissipation and fin heat conduction are low in cost but average in effect. Some high-end projectors use special heat dissipation designs, such as the PAS ventilation system and dual-channel three-dimensional heat dissipation technology, which improve heat dissipation efficiency by optimizing air flow paths and fan layouts. However, these designs are often complex and costly, making them difficult to popularize in all types of projectors.

[0004] Problems and shortcomings of existing technologies: Insufficient heat dissipation efficiency: Traditional heat dissipation technology often cannot meet the heat dissipation requirements of high-power projectors, causing equipment overheating, affecting performance and life; Noise problem: The fan in the air-cooled heat dissipation system will generate loud noise when running at high speed, affecting user experience; Cost and complexity: Although the special heat dissipation design is effective, its high cost and complex design limit its application in ordinary consumer-grade projectors.

[0005] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, an object of the present 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 existing in the heat dissipation solutions of the existing projectors, such as insufficient heat dissipation efficiency, high noise, high cost and complex solutions.

[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, wherein the projector comprises a first temperature sensor disposed on an LCD screen, a second temperature sensor disposed on a heat dissipation fin, a third temperature sensor disposed on an LED back panel, a first fan disposed outside an optical machine, and a second fan disposed inside the optical machine, the method comprising the steps of:

[0009] Controlling the first temperature sensor, the second temperature sensor and the third temperature sensor to respectively detect the temperature of the LCD screen, the temperature of the heat sink fins and the temperature of the LED back plate of the projector to obtain an LCD screen temperature signal, a heat sink fin temperature signal and an LED back plate temperature signal;

[0010] The rotation 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 backplane temperature signal.

[0011] In a further configuration of the present invention, the step of dynamically adjusting the rotation speeds of the first fan and the second fan respectively according to the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal specifically comprises:

[0012] When it is detected that any temperature value of the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal reaches a preset temperature threshold, the rotation speeds of the first fan and the second fan are increased synchronously;

[0013] When it is detected that the temperature signal of the LCD screen, the temperature signal of the heat sink fins and the temperature signal of the LED backplane all reach the exit preset temperature threshold, the rotation speeds of the first fan and the second fan are reduced.

[0014] According to a further configuration of the present invention, the entry temperature threshold of the heat sink temperature signal includes 0 degrees, 39 degrees, 41 degrees, 42 degrees, 44 degrees, 46 degrees, 47 degrees, and 50 degrees; the exit temperature threshold of the heat sink temperature signal includes -10 degrees, 34 degrees, 36 degrees, 38 degrees, 41 degrees, 42 degrees, and 45 degrees.

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

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

[0017] The increase in the rotation speed 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 fin temperature signal and the LED backplane temperature signal;

[0018] The decrease in the rotation speed of the first fan and the second fan is controlled according to the exit temperature thresholds of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplane temperature signal.

[0019] According to a further configuration of the present invention, when the temperature threshold of one of the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal reaches an upper limit value, the projector is controlled to shut down and a shutdown prompt is given.

[0020] A further arrangement of the present invention is that in the step of dynamically adjusting the rotational 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 backplane temperature signal, the rotational speeds of the first fan and the second fan are adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

[0021] According to a further configuration of the present invention, the gear combinations of the speed control signals 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 gears of the speed control signals of the first fan and the second fan increase successively as the entry temperature threshold increases.

[0022] According to a further configuration of the present invention, the first fan is an axial flow fan, and the second fan is a circulation fan.

[0023] In a second aspect, the present invention further provides a micro control unit, which 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 above when executing the computer program.

[0024] In a third aspect, the present invention further provides a storage medium having a computer program stored thereon, wherein the computer program is used to implement the heat dissipation control method of the projector as described above when executed by a processor.

[0025] In a fourth aspect, the present invention also provides a projector, which includes an optical machine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED screen, a heat sink fin, a first fan, a second fan and a micro control unit; the first temperature sensor is arranged on the LCD screen and connected to the micro control unit; the second temperature sensor is arranged on the heat sink fin and connected to the micro control unit; the third temperature sensor is arranged on the LED screen and connected to the micro control unit; the first fan is arranged outside the optical machine and connected to the micro control unit, and the second fan is arranged inside the optical machine and connected to the micro control unit; the micro control unit is used to dynamically adjust the rotation 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 backplane temperature signal.

[0026] The present invention provides a heat dissipation control method, a microcontroller unit, a storage medium and a projector for a projector. The projector includes a first temperature sensor arranged on an LCD screen, a second temperature sensor arranged on a heat dissipation fin, a third temperature sensor arranged on an LED back panel, a first fan arranged outside an optical machine and a second fan arranged inside the optical machine. The method includes the steps of: controlling the first temperature sensor, the second temperature sensor and the third temperature sensor to respectively detect the temperature of the LCD screen, the temperature of the heat dissipation fin and the temperature of the LED back panel of the projector to obtain an LCD screen temperature signal, a heat dissipation fin temperature signal and an LED back panel temperature signal; and dynamically adjusting the rotation speeds of the first fan and the second fan according to the LCD screen temperature signal, the heat dissipation fin temperature signal and the LED back panel temperature signal. The present invention adopts three temperature sensors to respectively detect the temperatures of the LCD screen inside the optical machine, the LED screen outside the optical machine and the heat dissipation fins in real time, and can dynamically adjust the rotation speeds of the first fan outside the optical machine and the second fan inside the optical machine according to the detected LCD screen temperature signal, the heat dissipation fin temperature signal and the LED backplane temperature signal, so as to accurately monitor and control the temperatures of different parts inside the projector, accurately control the fan speed to achieve the best heat dissipation effect, and thus achieve more efficient heat dissipation efficiency and reduce noise. The solution is simpler and has lower cost than the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 It is a flow chart of the heat dissipation control method of the projector in the present invention.

[0029] Figure 2 It is a principle block diagram of the micro control unit, the temperature sensor and the fan in the present invention.

[0030] Figure 3 It is a circuit schematic diagram of the first temperature sensor, the second temperature sensor, the third temperature sensor and the micro control unit in the present invention. DETAILED DESCRIPTION

[0031] The present invention provides a heat dissipation control method, a microcontroller unit, a storage medium and a projector for a projector. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In the embodiments and the scope of the patent application, unless the text specifically defines the article, "a", "an", "the" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] It should be further understood that the wording "comprising" used in the specification of the present invention refers to the presence of the 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 said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can also be an intermediate element. In addition, the "connection" or "coupling" used here can include wireless connection or wireless coupling. The wording "and / or" used here includes all or any unit and all combinations of one or more items listed in association.

[0034] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The inventor has found that some manufacturers have adopted an intelligent heat dissipation system. Through the temperature monitoring principle, when the internal temperature is too high, the fan in the machine will automatically increase the speed to cool down. However, this system cannot accurately control the fan speed to achieve the best heat dissipation effect. The existing technology lacks accurate monitoring and control of the temperature of different parts inside the projector, resulting in unsatisfactory heat dissipation effect.

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

[0038] In some embodiments, Figure 1 As shown, the present invention provides a heat dissipation control method for a projector, wherein the projector comprises a first temperature sensor arranged on an LCD screen, a second temperature sensor arranged on a heat dissipation fin, a third temperature sensor arranged on an LED back panel, a first fan arranged outside an optical machine, and a second fan arranged inside the optical machine, and the method comprises the steps of:

[0039] S100, controlling the first temperature sensor, the second temperature sensor, and the third temperature sensor to respectively detect the temperature of the LCD screen, the temperature of the heat sink fins, and the temperature of the LED backplane of the projector to obtain an LCD screen temperature signal, a heat sink fin temperature signal, and an LED backplane temperature signal;

[0040] Specifically, please combine 2 with Figure 3 The projector includes an optical machine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED screen, a heat sink fin, a first fan, a second fan and a micro control unit. The first temperature sensor is arranged on the LCD screen and connected to the micro control unit, the second temperature sensor is arranged on the heat sink fin and connected to the micro control unit, the third temperature sensor is arranged on the LED screen and connected to the micro control unit, the first fan is arranged outside the optical machine and connected to the micro control unit, and the second fan is arranged inside the optical machine and connected to the micro control unit. Among them, the first fan is an axial flow fan, which is a power machine based on axial flow, mainly used in ventilation, air conditioning, cooling and other fields, and the fluid power and dynamic pressure energy generated by the impeller are converted into static pressure energy, thereby generating airflow), and the second fan is a circulation fan, and the main function of the circulation fan is to increase the indoor air flow speed by sucking in air and accelerating it to discharge.

[0041] The LCD screen and the first temperature sensor are located inside the optical engine, the LED backplane is located outside the optical engine, the heat sink fins are used to transfer the heat inside the optical engine to the outside of the optical engine, and the second temperature sensor and the third temperature sensor are located outside the optical engine. The microcontroller unit can control the operation of the first temperature sensor, the second temperature sensor and the third temperature sensor, so as to detect the temperature of the LCD screen, the temperature of the heat sink fins and the temperature of the LED backplane, that is, the temperature inside the optical engine, the heat sink fins and the outside of the optical engine can be detected.

[0042] S200 , dynamically adjusting the rotation 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 backplane temperature signal.

[0043] Specifically, the microcontroller unit obtains the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal through the first temperature sensor, the second temperature sensor and the third temperature sensor, so that the rotation speeds of the first fan and the second fan can be controlled according to the temperatures of the three positions: the LCD screen, the LED screen and the heat sink fins. For example, when the temperature inside the optical machine is high, the rotation speed of the internal fan (the second fan) is increased; when the external ambient temperature is high, the rotation speed of the external fan (the first fan) is increased.

[0044] In the above technical scheme, the present invention sets three groups of temperature sensors inside the optical machine, on the heat sink fins and outside the optical machine, and can dynamically adjust the rotation speed of the fans inside and outside the optical machine in combination with the temperature of different positions of the projector and the structure of the optical machine itself. In this way, the present invention can accurately monitor the temperature conditions inside and outside the optical machine and accurately adjust the rotation speed of the fans inside and outside the optical machine. Compared with the existing method of directly increasing the fan speed when the temperature rise is detected, not only the heat dissipation efficiency (the fan heat dissipation method adopted in the prior art is not efficient enough under high brightness or high power conditions) and heat dissipation effect are better, but also the noise is reduced, and the performance degradation and damage risk of the projector due to overheating are reduced. In addition, the present invention is relatively simple in structural design and low in cost, and can be applied to various types of projectors, with broad application prospects.

[0045] In some embodiments, the step of dynamically adjusting the rotation 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 backplane temperature signal specifically includes:

[0046] S210, when it is detected that any temperature value of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplane temperature signal reaches a preset temperature threshold, synchronously increasing the rotation speeds of the first fan and the second fan;

[0047] Specifically, the temperature threshold of the LCD screen temperature signal includes 0 degrees, 44 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 49 degrees, 50 degrees, and 55 degrees; the temperature threshold of the heat sink fin temperature signal includes 0 degrees, 39 degrees, 41 degrees, 42 degrees, 44 degrees, 46 degrees, 47 degrees, and 50 degrees; the temperature threshold of the LED backplane temperature signal includes 0 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, 66 degrees, and 69 degrees. The increase in the speed of the first fan and the second fan is controlled according to the temperature thresholds of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplane temperature signal.

[0048] When it is detected that the temperature of one of the positions of the LCD screen, the heat sink fins or the LED backplane reaches the preset temperature threshold, the speed of the first fan and the second fan is increased by one gear. For example, when it is detected that the temperature of the LCD screen reaches 44 degrees, the speed of the first fan and the second fan is controlled to increase. Similarly, when it is detected that the temperature of the heat sink fins reaches 42 degrees, the speed of the first fan and the second fan is controlled to increase. When it is detected that the temperature of the LED backplane reaches 61 degrees, the speed of the first fan and the second fan is controlled to increase. In other words, as long as one of the LCD screen temperature, the heat sink fin temperature signal and the LED backplane temperature signal reaches the temperature threshold, the speed of the first fan and the second fan is increased.

[0049] S220: When it is detected that the temperature signal of the LCD screen, the temperature signal of the heat sink fins, and the temperature signal of the LED backplane all reach an exit preset temperature threshold, reduce the rotation speeds of the first fan and the second fan.

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

[0051] When it is detected that the temperature of the LCD screen, the heat sink fin temperature signal and the LED backplane temperature signal at the same fan speed gear have reached the exit temperature threshold, the speed of the first fan and the second fan will be controlled to decrease. For example, when the fan is in the third gear, the temperature of the LCD screen may reach 46 degrees, or the temperature of the heat sink fins may reach 41 degrees, or the temperature of the LED backplane may reach 62 degrees. Then, only when the LCD screen temperature reaches 40 degrees, the heat sink fin temperature signal reaches 36 degrees at the same time, and the LED backplane temperature signal reaches 56 degrees, the gear of the first fan and the second fan will be lowered. In other words, as long as the temperature of one of the LCD screen, the heat sink fins and the LED backplane does not reach the exit temperature threshold, the gear of the first fan and the second fan will not be lowered, that is, the speed will not decrease, so as to ensure the heat dissipation effect of the projector.

[0052] In some embodiments, when the entry temperature threshold of one of the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal reaches an upper limit value, the projector is controlled to shut down and a shutdown prompt is given.

[0053] Specifically, the temperatures of the LCD screen, the heat sink fins, and the LED backplane have upper limits, because the heat dissipation effect of the first fan and the second fan is limited. Therefore, once the temperature value of one of the LCD screen, the heat sink fins, and the LED backplane reaches the upper limit, the projector will issue a shutdown reminder and shut down after the reminder to prevent the projector from being damaged due to overheating and avoid safety accidents. In addition, when the entry temperature threshold of the LCD screen, the heat sink fins, and the LED backplane reaches the highest, that is, the rotation speed of the first fan and the second fan reaches the highest at this time, an alarm will be processed.

[0054] In some embodiments, in the step of dynamically adjusting 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 backplane temperature signal, the speeds of the first fan and the second fan are adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

[0055] Specifically, the gear combinations of the speed control signals 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 gear combinations of the speed control signals of the first fan and the second fan increase successively with the increase of the entry temperature threshold.

[0056] When the first fan and the second fan are in the first gear, the temperatures of the LCD screen, the heat sink fins and the LED backplane reach the temperature entry threshold of the first gear. For example, the temperature of the heat sink fins is 0 degrees, or the temperature of the LED screen is detected to be 0 degrees. At this time, the duty cycle combination of the speed control signals of the first fan and the second fan is 40%+80%. When it is detected that the temperatures of the LCD screen, the heat sink fins and the LED backplane reach the temperature entry 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 speeds of the first fan and the second fan according to the temperatures inside and outside the optical machine, thereby improving the heat dissipation efficiency and reducing the noise generated by the fan operation.

[0057] In some embodiments, the present invention further provides a micro control unit, which includes a memory and a processor, wherein a computer program is provided on the memory, and the processor is used to implement the steps in the heat dissipation control method of the projector when executing the computer program:

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

[0059] S200: Dynamically adjust the rotation 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 backplane temperature signal. The details are as described in an embodiment of a heat dissipation control method for a projector, which will not be described in detail here.

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

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

[0062] S200: Dynamically adjust the rotation 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 backplane temperature signal. The details are as described in an embodiment of a heat dissipation control method for a projector, which will not be described in detail here.

[0063] In some embodiments, see Figure 2 and Figure 3 The present invention also provides a projector, which includes an optical machine, a first temperature sensor LCD_NTC, a second temperature sensor EVR_NTC, a third temperature sensor LED_NTC, an LCD screen, an LED screen, a heat sink fin, a first fan, a second fan and a microcontroller unit MCU; the first temperature sensor LCD_NTC is arranged on the LCD screen and connected to the microcontroller unit MCU; the second temperature sensor EVR_NTC is arranged on the heat sink fin and connected to the microcontroller unit MCU; the third temperature sensor LED_NTC is arranged on the LED screen and connected to the microcontroller unit MCU; the first fan is arranged outside the optical machine and connected to the microcontroller unit MCU, and the second fan is arranged inside the optical machine and connected to the microcontroller unit MCU; the microcontroller unit MCU is used to dynamically adjust the rotation speeds of the first fan and the second fan according to the LCD screen temperature signal LCD_NTC IC, the heat sink fin temperature signal EVR_NTC IC and the LED backplane temperature signal LED_NTC IC.

[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 a in FIG. 1 is the circuit schematic diagram of the third temperature sensor. Figure 3 b in FIG. 1 is the circuit schematic diagram of the second temperature sensor. Figure 3 c in FIG. 1 is the circuit schematic diagram of the first temperature sensor. Figure 3 d in the figure is a circuit schematic diagram of a microcontroller unit. The first temperature sensor LCD_NTC, the second temperature sensor EVR_NTC and the third temperature sensor LED_NTC are connected to the microcontroller unit MCU via an IIC bus. The first fan is an axial flow fan outside the optical machine, and the second fan is a circulation fan inside the optical machine. The first fan and the second fan are connected to the microcontroller unit 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 LCD screen, the temperature of the heat sink fins and the temperature of the LED backplane of the projector respectively to obtain the LCD screen temperature signal LCD_NTCIC, the heat sink fin temperature signal EVR_NTC IC and the LED backplane temperature signal LED_NTC IC. Afterwards, the microcontroller unit MCU can 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 fin temperature signal EVR_NTC IC and the LED backplane temperature signal LED_NTC IC, respectively, and can accurately monitor the temperature conditions inside and outside the optical machine and accurately adjust the speed of the fan inside and outside the optical machine. Compared with the existing method of directly increasing the fan speed when the temperature rise is detected, not only the heat dissipation efficiency and heat dissipation effect are better, but also the noise is reduced, and the performance degradation and damage risk of the projector due to overheating are reduced.

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

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

[0068] The structural design is relatively simple, the cost is low, it can be applied to various types of projectors, and it has broad application prospects.

[0069] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A heat dissipation control method for a projector, characterized in that: The projector includes a first temperature sensor arranged on an LCD screen, a second temperature sensor arranged on a heat sink fin, a third temperature sensor arranged on an LED back panel, a first fan arranged outside an optical machine, and a second fan arranged inside the optical machine. The method includes the steps of: Controlling the first temperature sensor, the second temperature sensor and the third temperature sensor to respectively detect the temperature of the LCD screen, the temperature of the heat sink fins and the temperature of the LED back plate of the projector to obtain an LCD screen temperature signal, a heat sink fin temperature signal and an LED back plate temperature signal; The rotation 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 backplane temperature signal.

2. The heat dissipation control method of a projector according to claim 1, characterized in that: The step of dynamically adjusting the rotation 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 backplane temperature signal specifically includes: When it is detected that any temperature value of the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal reaches a preset temperature threshold, the rotation speeds of the first fan and the second fan are increased synchronously; When it is detected that the temperature signal of the LCD screen, the temperature signal of the heat sink fins and the temperature signal of the LED backplane all reach the exit preset temperature threshold, the rotation speeds of the first fan and the second fan are reduced.

3. The heat dissipation control method of a projector according to claim 2, characterized in that: The entry temperature threshold of the heat sink temperature signal includes 0 degrees, 39 degrees, 41 degrees, 42 degrees, 44 degrees, 46 degrees, 47 degrees, and 50 degrees; the exit temperature threshold of the heat sink temperature signal includes -10 degrees, 34 degrees, 36 degrees, 38 degrees, 41 degrees, 42 degrees, and 45 degrees; The entry temperature threshold of the LCD screen temperature signal includes 0 degrees, 44 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 49 degrees, 50 degrees, and 55 degrees; the exit temperature threshold of the LCD screen temperature signal includes -10 degrees, 39 degrees, 40 degrees, 41 degrees, 44 degrees, 45 degrees, and 47 degrees; The entry temperature threshold of the LED backplane temperature signal includes 0 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, 66 degrees, and 69 degrees; the exit temperature threshold of the LED backplane temperature signal includes -10 degrees, 55 degrees, 56 degrees, 56 degrees, 57 degrees, 58 degrees, and 61 degrees; The increase in the rotation speed 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 fin temperature signal and the LED backplane temperature signal; The decrease in the rotation speed of the first fan and the second fan is controlled according to the exit temperature thresholds of the LCD screen temperature signal, the heat sink fin temperature signal, and the LED backplane temperature signal.

4. The heat dissipation control method of a projector according to claim 3, characterized in that: When the temperature threshold of one of the LCD screen temperature signal, the heat sink fin temperature signal and the LED backplane temperature signal reaches an upper limit value, the projector is controlled to shut down and a shutdown prompt is given.

5. The heat dissipation control method of a projector according to claim 1, characterized in that: In the step of dynamically adjusting the rotational 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 backplane temperature signal, the rotational speeds of the first fan and the second fan are adjusted by adjusting the duty cycle of the speed control signals of the first fan and the second fan.

6. The heat dissipation control method of a projector according to claim 5, characterized in that: The gear combinations of the speed control signals 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 gear combinations of the speed control signals of the first fan and the second fan increase successively with the increase of the entry temperature threshold.

7. The heat dissipation control method of a projector according to claim 1, characterized in that: The first fan is an axial flow fan, and the second fan is a circulation fan.

8. A micro control unit, characterized in that: The method comprises a memory and a processor, wherein the memory is provided with a computer program, and the processor is used for implementing the heat dissipation control method of the projector as claimed in any one of claims 1 to 7 when executing the computer program.

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

10. A projector, characterized in that: It includes an optical machine, a first temperature sensor, a second temperature sensor, a third temperature sensor, an LCD screen, an LED screen, a heat sink fin, a first fan, a second fan and a micro control unit as described in claim 8; the first temperature sensor is arranged on the LCD screen and connected to the micro control unit; the second temperature sensor is arranged on the heat sink fin and connected to the micro control unit; the third temperature sensor is arranged on the LED screen and connected to the micro control unit; the first fan is arranged outside the optical machine and connected to the micro control unit, and the second fan is arranged inside the optical machine and connected to the micro control unit; the micro control unit is used to dynamically adjust the rotation 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 backplane temperature signal.

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