WO2022057869A1 - 激光投影设备、激光投影设备散热方法和散热装置 - Google Patents

激光投影设备、激光投影设备散热方法和散热装置 Download PDF

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WO2022057869A1
WO2022057869A1 PCT/CN2021/118903 CN2021118903W WO2022057869A1 WO 2022057869 A1 WO2022057869 A1 WO 2022057869A1 CN 2021118903 W CN2021118903 W CN 2021118903W WO 2022057869 A1 WO2022057869 A1 WO 2022057869A1
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Prior art keywords
temperature value
laser
temperature
value
projection device
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PCT/CN2021/118903
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English (en)
French (fr)
Inventor
崔雷
邢哲
戴洁
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青岛海信激光显示股份有限公司
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Priority to CN202180064346.6A priority Critical patent/CN116235109A/zh
Publication of WO2022057869A1 publication Critical patent/WO2022057869A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources

Definitions

  • the present application relates to the field of imaging technologies, and in particular, to a laser projection device, a heat dissipation method and a heat dissipation device for the laser projection device.
  • a laser projection device is a device that can generate an image from a laser and project it onto a screen.
  • Laser projection equipment includes a laser, and the laser emits laser light while generating heat, which increases the temperature of the laser.
  • the ambient temperature can also affect the temperature of the laser. When the ambient temperature is high, the temperature of the laser will increase. When the temperature of the laser is too high, the luminous efficiency of the laser will be affected, and the service life of the laser will be shortened. When the laser projection device is running, the luminous efficiency of the laser can be stabilized by cooling the laser projection device.
  • a laser projection device including a laser assembly, a temperature detection assembly, a processing assembly and a heat sink, the laser assembly includes lasers of at least two colors, and the lasers of the at least two colors include a red laser;
  • the temperature detection component is used to obtain the temperature of the red laser when it is running;
  • the processing component is used to control the heat sink to dissipate heat from the red laser, so that the temperature of the red laser is between the first temperature value and the first temperature value.
  • the first temperature value is the highest temperature value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than the specified value
  • the second temperature value is the maximum temperature value.
  • the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging picture of the laser projection device is less than the minimum temperature value of the specified value.
  • a heat dissipation method for a laser projection device which is used for the laser projection device.
  • the laser projection device includes a laser assembly and a heat sink, the laser assembly includes at least two colors of lasers, and the at least two colors of lasers
  • the laser includes a red laser
  • the method includes: acquiring a first temperature value when the red laser is running, where the first temperature value is a color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device. The highest temperature value whose degree of deviation is less than the specified value; the second temperature value when the red laser is running is obtained, and the second temperature value is the deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device. the lowest temperature value less than a specified value; the heat sink is controlled so that the temperature of the red laser lies between the first temperature value and the second temperature value.
  • a heat dissipation device for laser projection equipment which is used for laser projection equipment, the laser projection equipment includes a laser and a heat sink, and the device includes: a first temperature acquisition module for acquiring the operation of the red laser The first temperature value, the first temperature value is the highest temperature value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than the specified value; the second temperature acquisition module, using in acquiring the second temperature value when the red laser is running, the second temperature value is the lowest temperature value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than a specified value; A control module, configured to control the heat sink so that the temperature of the red laser is between the first temperature value and the second temperature value.
  • FIG. 1 is a block diagram of a laser projection apparatus according to some embodiments.
  • FIG. 2 is a structural diagram of a heat sink according to some embodiments.
  • FIG. 3 is a schematic structural diagram of a laser projection apparatus according to some embodiments.
  • FIG. 4 is a flowchart of a heat dissipation method for a laser projection device according to some embodiments
  • FIG. 5 is a flowchart of a heat dissipation method for a laser projection device according to some embodiments
  • FIG. 6 is a schematic structural diagram of a heat dissipation device of a laser projection apparatus according to some embodiments.
  • FIG. 1 is a schematic structural diagram of a laser projection device shown in some embodiments of the present application.
  • the laser projection device 10 includes a laser assembly 11 , a temperature detection assembly 12 , a processing assembly 13 and a heat sink 14 .
  • the laser assembly 11 includes lasers of at least two colors, and the lasers of the at least two colors include a red laser 111 .
  • the temperature detection assembly 12 is configured to obtain the temperature at which the red laser is operating.
  • the processing component 13 is configured to control the heat sink 14 to dissipate heat from the red laser 111 so that the temperature of the red laser 111 is between a first temperature value and a second temperature value, where the red laser light emitted by the red laser 111 is at The deviation degree of the color ratio in the imaging screen of the laser projection device is less than the highest temperature value of the specified value, and the second temperature value is the deviation degree of the color ratio of the red laser emitted by the red laser 111 in the imaging screen of the laser projection device is less than the specified value.
  • Minimum temperature value may include one or more central processing units, or may also include other control circuits, which are not limited in this embodiment of the present application.
  • some embodiments of the present application provide a laser projection device, including a laser component, a temperature detection component, a processing component, and a heat sink, the temperature of the red laser during operation is obtained through the temperature detection component, and the temperature is controlled by the heat sink The temperature of the laser, so that the temperature of the laser can be maintained between the first temperature value and the second temperature value during operation, so as to reduce the degree of color shift of the laser during operation, so that the temperature of the laser projection equipment can be more comprehensively controlled. controlled.
  • the laser emits laser light after power-on operation.
  • the photoelectric conversion efficiency of the laser is usually about 40%, and the rest of the electrical energy is converted into heat energy, that is, the laser will generate heat during operation.
  • the heat causes the laser temperature to be too high, it will cause The laser is unable to maintain a specific luminous rate, resulting in imaging screen display problems, such as color cast problems, for example.
  • the degree of color shift of the laser emitted by the laser is less than the maximum temperature value of the specified value.
  • the maximum temperature value is different according to the specifications of the laser.
  • the specific method of obtaining the first temperature value can be obtained from the laser manufacturer, or the color shift of the imaging screen can be obtained. degree decides.
  • the processing component is configured to: determine an undetermined temperature value; obtain a shift rate between the undetermined temperature value and the first temperature value to the color coordinates of the image of the laser projection device; when the shift rate is less than the target value When the undetermined temperature value is determined as the second temperature value; when the offset rate is not less than the target value, adjust the undetermined temperature value, and execute the acquisition of the undetermined temperature value and the first temperature value to the color coordinates of the imaging screen of the laser projection device Offset rate steps.
  • the undetermined temperature value is the lowest temperature value at which the color cast of the obtained laser emitted by the laser is less than the specified value.
  • color coordinates are a coordinate diagram that quantitatively expresses color by physical methods.
  • the color coordinate represents the color by the values of the x-axis and y-axis.
  • the standard red color coordinate is (0.67, 0.33)
  • the standard green color coordinate is (0.21, 0.71)
  • the standard blue color coordinates are (0.14, 0.08).
  • the color coordinates of pure white light are (0.33, 0.33).
  • the color coordinates of the generated imaging screen are shifted from the color coordinates of the imaging screen generated under normal temperature conditions, that is, the red color.
  • the values of the coordinates, green color coordinates, and blue color coordinates change. Therefore, the color cast degree of the imaged image can be judged by the coordinate value of the color coordinate.
  • a red laser is selected as the monitoring object.
  • the processing component is further configured to: determine, according to a preset formula, a shift rate between the undetermined temperature value and the first temperature value to the color coordinates of the image of the laser projection device, and the preset formula includes:
  • n is the offset rate, when X 2 is the first temperature value, the coordinate value of red on the x-axis of the color coordinate in the imaging picture, and when X 1 is the undetermined temperature value, the coordinate value of red in the imaging picture on the x-axis of the color coordinate .
  • the undetermined temperature value is the lowest temperature value at which the color cast of the obtained laser emitted by the laser is less than the specified value, but the lowest temperature value may not be the most suitable temperature value, so the undetermined temperature value can be checked by a preset formula.
  • the undetermined temperature value is put into the above preset formula, and when the value of the offset rate calculated on the left side of the formula is less than or equal to n, that is, less than or equal to the target value, the undetermined temperature value is determined as the second temperature value.
  • the undetermined temperature value is not optimal Pending temperature value, adjust the pending temperature value.
  • the target value may be 4%.
  • the shift rate is less than the target value, it means that the shift degree of the red light is within an acceptable range, and the overall color rendering of the imaging image is within the normal range, and the undetermined temperature value can be determined as the second temperature value,
  • the second temperature value is the lowest temperature value at which the color shift degree of the laser light emitted by the laser is less than the specified value.
  • the to-be-determined temperature value can be adjusted.
  • the adjusted undetermined temperature value is brought back into the preset formula, and the relationship between the offset rate and the target value is judged again.
  • the above steps can be repeated many times until the offset rate is less than the target value, and the undetermined temperature value is determined as the first. Two temperature values.
  • the heat sink includes a heat sink and two fans located on both sides of the heat sink, and the processing component is further configured to: determine a third temperature value between the first temperature value and the second temperature value; When the temperature of the laser is higher than the third temperature value, the two fans are controlled to run at the same time; when the temperature of the laser is lower than the third temperature value, one of the two fans is controlled to run, and the other fan is turned off.
  • a liquid cooling mode or an air cooling mode can be used to dissipate heat from the laser, and some embodiments of the present application are described by using the air cooling mode as an example.
  • FIG. 2 is a schematic structural diagram of a heat sink according to some embodiments of the present application.
  • the heat sink 30 includes a heat sink 31 and a first fan 32 and a second fan 33 located on both sides of the heat sink 31.
  • the heat sink 30 may also include a heat conduction pipe 34 and a heat conduction plate 35.
  • the heat conduction pipe 34 and the heat conduction plate 35 are used for transferring heat. Therefore, a material with better heat transfer performance can be selected.
  • the heat-conducting pipe 34 and the heat-conducting plate 35 used in some embodiments of the present application are heat-conducting copper pipes and heat-conducting copper plates.
  • the materials of the heat-conducting pipes 34 and the heat-conducting plates 35 are not limited in this application.
  • the heat-conducting copper plate is connected to the heat-conducting copper pipe, and the other end is connected to the heat sink 31.
  • the first fan 32 and the second fan 33 on both sides of the heat sink 31 are arranged opposite to increase the heat dissipation capacity of the heat sink.
  • the heat sink 31 is a heat sink aluminum sheet, or is made of other materials with high heat dissipation effect, which is not limited in this application.
  • the heat-conducting copper plate absorbs and transfers the heat to the heat-conducting copper tube, and the heat-conducting copper tube transfers the heat to the heat-dissipating aluminum sheet through the principle of phase change heat transfer. The heat is dissipated, thereby rapidly reducing the temperature of the laser.
  • the difference between the first temperature value and the third temperature value is smaller than the difference between the third temperature value and the second temperature value.
  • the third temperature value is a value between the first temperature value and the second temperature value, and the third temperature value can be used as a temperature value for judging whether to adjust the current heat dissipation mode of the radiator.
  • the temperature change of the radiator to the laser requires a process. If the radiator is adjusted after the temperature of the laser exceeds the first temperature value and the second temperature value, the temperature of the laser remains at a temperature that can maintain normal luminous efficiency for a period of time. Outside the temperature range, that is, the displayed picture will have a serious color cast for a period of time, which will still reduce the user's viewing experience.
  • the difference between the first temperature value and the third temperature value may also be greater than the difference between the third temperature value and the second temperature value, that is, the third temperature value may be any one between the first temperature value and the second temperature value numerical value. Therefore, the present application further sets a third temperature value between the first temperature value and the second temperature value, and the heat sink can be controlled by whether the laser reaches the third temperature value.
  • the third temperature value is an arbitrary value between the first temperature value and the second temperature value that is closer to the highest temperature value.
  • the temperature of the laser is higher than the third temperature value, the temperature of the laser is closer to the first temperature value, that is, the temperature of the laser is close to the maximum temperature value.
  • the two fans that control the heat sink run at the same time, and the two fans force Convection can cool the laser more quickly.
  • the fan has a first rotational speed and a second rotational speed, the first rotational speed is lower than the second rotational speed
  • the processing component is further configured to: when the temperature of the laser is lower than the third temperature, turn off one of the two fans One fan is controlled to run at the first speed; when the temperature of the laser is higher than the first temperature, the two fans are controlled to run at the second speed.
  • the rotational speeds of the two fans may be set in advance, the fans have a first rotational speed and a second rotational speed, the first rotational speed is smaller than the second rotational speed, and the first rotational speed may be the lowest rotational speed, or may be a relative first rotational speed.
  • the second rotational speed is lower than the first rotational speed.
  • the second rotational speed may be the maximum rotational speed of the fan, or may be a rotational speed higher than the first rotational speed.
  • the specific second rotational speed can be adjusted according to the current temperature.
  • the speed of one of the two fans is set to 0, and the speed of the other fan in the running state is adjusted to the first speed of the fan.
  • Speed when the temperature of the laser is lower than the second temperature, that is, lower than the minimum temperature value where the color cast of the laser emitted by the laser is less than the specified value, one of the two fans is turned off, so that the The speed of one fan is 0, and the speed of the other fan in operation is adjusted to the minimum speed of the fan.
  • the heat dissipation capacity of the heat sink is low, and the laser can be slightly dissipated during operation to prevent the temperature of the laser. Too high produces a color cast.
  • the fan that is turned off is turned on, so that the fan runs at the first rotation speed, and the other fan runs continuously.
  • the laser temperature may exceed the maximum temperature value at which the color shift degree of the laser emitted by the laser is less than the specified value, that is, higher than the first temperature.
  • Both fans are turned on and the wind speed is adjusted to the second speed. The two oppositely arranged fans can quickly cool down the radiator at a higher wind speed, so that the radiator can be maintained between the first temperature and the second temperature value, thereby ensuring imaging. the quality of the picture.
  • FIG. 3 is a schematic structural diagram of another laser projection device according to an embodiment of the present application.
  • the laser projection device 60 includes a processing component (not shown in the figure), a laser 61 and a heat sink, and the processing component is used to control the rotational speed of the fan in the heat sink.
  • the laser projection apparatus 60 also includes an illumination system 62 , an electronic card board 63 and a lens 64 .
  • the laser 61 is used for outputting the laser light to the lighting system 62, imaging through the lighting system 62, and outputting the imaged image through the lens 64
  • the electronic card board 63 is used for providing driving force for other components in the laser projection device 60, and controlling the laser light Input and output of the projection device 60 signal.
  • the heat sink includes a heat sink 31 and a first fan 32 and a second fan 33 located on both sides of the heat sink 31 .
  • the heat sink also includes a fan assembly, the fan assembly includes at least two independent fans, each independent fan is respectively disposed near each component in the laser projection device 60 , the number and size of the fans in the fan assembly can vary with the size of the laser projection device 60 . make changes.
  • the fan assembly in the embodiment of the present application includes three fans 351 , 352 and 353 , and the three fans 351 , 352 and 353 are respectively disposed near the lighting system 62 , the electronic card board 63 and the lens 64 .
  • the lighting system 62 and the electronic card board 63 And the temperature of the lens 64 is relatively stable and changes with the ambient temperature, so it can be continuously cooled by an independent fan.
  • the processing component is located at a preset position in the laser projection device 60, and the processing component controls the first fan 32, the second fan 33 and the fan component at the same time, or two processing components can be used to control the The first fan 32, the second fan 33 and the fan assembly are controlled, and the control method and control quantity of the processing assembly are not limited in this embodiment of the present application.
  • the layout of the laser projection device 60 is set as follows, the first fan 32 and the second fan 33 connected to the heat sink 31 in the heat sink are arranged opposite to each other, and the heat sink 31, The first fan 32 and the second fan 33 are adjacent to the laser 61 , the heat-conducting plate in the heat sink can be in contact with the laser 61 and transfer the heat of the laser 61 to the heat sink 31 through the heat-conducting pipe, and the fan 351 is located on the other side of the laser 61 . On one side, it cooperates with the first fan 32 and the second fan 33 to uniformly dissipate heat for the laser 61 .
  • the fan 352 is located on one side of the electronic card board 63 , and can cool the electronic card board 63 .
  • the fan 353 is arranged opposite to the second fan 33 to cool the lens 64 through convection wind.
  • the first fan 32 is an air inlet
  • the second fan 33 is an air outlet
  • the wind direction is an air path along the F direction. is the air path in the vertical direction along the F direction.
  • some embodiments of the present application provide a laser projection device, including a laser component, a temperature detection component, a processing component, and a heat sink, the temperature of the red laser during operation is obtained through the temperature detection component, and the temperature is controlled by the heat sink The temperature of the laser, so that the temperature of the laser can be maintained between the first temperature value and the second temperature value during operation, so as to reduce the degree of color shift of the laser during operation, so that the temperature of the laser projection equipment can be more comprehensively controlled. controlled.
  • FIG. 4 is a flowchart of a heat dissipation method for a laser projection device shown in some embodiments of the present application, which is used in the laser projection device provided by any of the above embodiments, and includes the following steps:
  • Step 401 Obtain a first temperature value when the red laser is running.
  • the first temperature value is the highest temperature value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than a specified value.
  • Step 402 Obtain the second temperature value when the red laser is running, the second temperature value is the lowest temperature value at which the deviation degree of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than the specified value.
  • Step 403 Control the heat sink so that the temperature of the red laser is between the first temperature value and the second temperature value.
  • some embodiments of the present application provide a heat dissipation method for a laser projection device, which is used in a laser projection device including a laser component, a temperature detection component, a processing component, and a heat sink, and obtains the running time of the red laser through the temperature detection component.
  • the temperature of the laser is controlled by the radiator, so that the temperature of the laser can be maintained between the first temperature value and the second temperature value during operation, thereby reducing the degree of color cast of the laser during operation.
  • the temperature of the laser projection equipment is more comprehensively controlled.
  • FIG. 5 is a flowchart of another heat dissipation method for a laser projection device shown in some embodiments of the present application, which includes the following steps:
  • Step 501 Obtain a first temperature value when the red laser is running, and the first temperature value is the highest temperature value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging screen of the laser projection device is less than a specified value.
  • Step 502 Determine the undetermined temperature value.
  • Step 503 Obtain the shift ratio of the undetermined temperature value and the first temperature value to the color coordinates of the image of the laser projection device.
  • the preset formula includes:
  • n is the offset rate, when X 2 is the first temperature value, the coordinate value of red on the x-axis of the color coordinate in the imaging picture, and when X 1 is the undetermined temperature value, the coordinate value of red in the imaging picture on the x-axis of the color coordinate .
  • Step 504 determine whether the offset rate is less than the target value, when the offset rate is less than the target value, execute step 505 ; when the offset rate is not less than the target value, execute step 506 .
  • Step 505 determine the undetermined temperature value as the second temperature value; go to step 507 .
  • Step 506 adjust the to-be-determined temperature value, and perform step 503 .
  • Step 507 Control the heat sink so that the temperature of the red laser is between the first temperature value and the second temperature value.
  • some embodiments of the present application provide a heat dissipation method for a laser projection device, which is used in a laser projection device including a laser component, a temperature detection component, a processing component, and a heat sink, and obtains the running time of the red laser through the temperature detection component.
  • the temperature of the laser is controlled by the radiator, so that the temperature of the laser can be maintained between the first temperature value and the second temperature value during operation, thereby reducing the degree of color cast of the laser during operation.
  • the temperature of the laser projection equipment is more comprehensively controlled.
  • FIG. 6 is a schematic structural diagram of a heat dissipation device of a laser projection device according to some embodiments of the present application.
  • the device is used in a laser projection device, and the laser projection device includes a laser and a heat sink.
  • the cooling device 20 of the laser projection equipment includes:
  • the first temperature acquisition module 201 is configured to acquire a first temperature value when the red laser is running, and the first temperature value is the highest value that the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging picture of the laser projection device is less than the specified value. temperature value.
  • the second temperature obtaining module 202 is configured to obtain a second temperature value when the red laser is running, where the second temperature value is the lowest value at which the degree of deviation of the color ratio of the red laser emitted by the red laser in the imaging picture of the laser projection device is less than the specified value temperature value.
  • the control module 203 is configured to control the heat sink so that the temperature of the red laser is between the first temperature value and the second temperature value.
  • some embodiments of the present application provide a heat dissipation device for a laser projection device, which is used in a laser projection device including a laser component, a temperature detection component, a processing component, and a heat sink, and obtains the running time of the red laser through the temperature detection component.
  • the temperature of the laser is controlled by the radiator, so that the temperature of the laser can be maintained between the first temperature value and the second temperature value during operation, thereby reducing the degree of color cast of the laser during operation.
  • the temperature of the laser projection equipment is more comprehensively controlled.
  • the heat dissipation method of the laser projection device shown in FIG. 5 is used for the laser projection device 60 shown in FIG. 3 to conduct experiments, and the specific process is as follows:
  • the temperature of the laser can be maintained between 38 and 45°C, that is, the first temperature is 45°C and the second temperature is 38°C.
  • the third temperature value was determined to be 43°C.
  • the ambient temperature is 10°C, if the fan assembly and the first fan 32 and the second fan 33 still operate normally at the lowest speed, the temperature of the laser drops below 38°C, reaching about 30°C, which is lower than the laser's normal luminous efficiency.
  • the minimum temperature value is 38°C.
  • any one of the first fan 32 and the second fan 33 is turned off, and the rotation speed is set to zero, and the The heat dissipation capacity becomes weak, and the temperature of the laser rises to above 38°C.
  • the temperature of the laser will also rise.
  • the temperature of the laser will reach about 43°C (the third temperature value)
  • the fan that has stopped rotating will be started again to make the fan run at the lowest speed.
  • the heat dissipation capacity of the heat sink is improved, and the temperature of the laser is reduced to above 38°C.
  • all fans run normally.
  • the temperature of the laser is higher than 45°C, the rotational speed of the first fan 32 and the second fan 33 is increased, the heat dissipation capacity of the radiator is improved, and the temperature of the laser is lowered to 45°C the following.
  • the temperature of the laser is controlled between 38-45 °C, the three-color laser of the laser maintains a normal luminous rate, and the color rendering of the imaging picture is normal, which improves the quality of the imaging picture and the user's viewing experience, and prolongs the time. Laser lifetime.

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Abstract

本申请公开了一种激光投影设备、激光投影设备散热方法和散热装置，属于成像技术领域。激光投影设备中的温度检测组件用于获取红色激光器运行时的温度；处理组件用于控制散热器对红色激光器进行散热，以使红色激光器的温度位于第一温度值和第二温度值之间。

Description

激光投影设备、激光投影设备散热方法和散热装置
相关申请的交叉引用
本申请要求在2020年09月21日提交的，申请号为202010996454.4的中国专利申请的优先权，它们的全部内容通过引用结合在本申请中。
技术领域
本申请涉及成像技术领域，特别涉及一种激光投影设备、激光投影设备散热方法和散热装置。
背景技术
激光投影设备是一种能够将激光生成影像画面并投射到屏幕上的设备。激光投影设备中包括激光器，激光器在发出激光的同时会产生热量，致使激光器温度升高。另外，环境温度也可以影响激光器的温度，当环境温度较高时，激光器的温度随之升高，激光器的温度过高时会影响激光器的发光效率，同时缩短激光器的使用寿命。在激光投影设备运行时可以通过对激光投影设备进行散热从而稳定激光器的发光效率。
发明内容
一方面，提供一种激光投影设备，包括激光组件、温度检测组件、处理组件以及散热器，所述激光组件包括至少两种颜色的激光器，所述至少两种颜色的激光器中包括红色激光器；所述温度检测组件用于获取所述红色激光器运行时的温度；所述处理组件用于控制所述散热器对所述红色激光器进行散热，以使所述红色激光器的温度位于第一温度值和第二温度值之间，所述第一温度值为所述红色激光器发出的红色激光在激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最高温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最低温度值。
一方面，提供一种激光投影设备的散热方法，用于激光投影设备，所述激光投影设备包括激光组件以及散热器，所述激光组件包括至少两种颜色的激光器，所述至少两种颜色的激光器中包括红色激光器，所述方法包括：获 取所述红色激光器运行时的第一温度值，所述第一温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值；获取所述红色激光器运行时的第二温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值；控制所述散热器，以使所述红色激光器的温度位于所述第一温度值和所述第二温度值之间。
再一方面，提供一种激光投影设备的散热装置，用于激光投影设备，所述激光投影设备包括激光器以及散热器，所述装置包括：第一温度获取模块，用于获取所述红色激光器运行时的第一温度值，所述第一温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值；第二温度获取模块，用于获取所述红色激光器运行时的第二温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值；控制模块，用于控制所述散热器，以使所述红色激光器的温度位于所述第一温度值和所述第二温度值之间。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是根据一些实施例的激光投影设备的结构图；
图2为根据一些实施例的一种散热器的结构图；
图3为根据一些实施例的一种激光投影设备的结构意图；
图4是根据一些实施例的一种激光投影设备的散热方法的流程图；
图5是根据一些实施例的一种激光投影设备的散热方法的流程图；
图6为根据一些实施例的一种激光投影设备的散热装置的结构示意图。
通过上述附图，已示出本申请提供的一些实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
图1是本申请的一些实施例示出的一种激光投影设备的结构示意图。
激光投影设备10包括激光组件11、温度检测组件12、处理组件13以及散热器14，激光组件11包括至少两种颜色的激光器，至少两种颜色的激光器中包括红色激光器111。
温度检测组件12被配置为获取红色激光器运行时的温度。
处理组件13被配置为控制散热器14以对红色激光器111进行散热，使红色激光器111的温度位于第一温度值和第二温度值之间，第一温度值为红色激光器111发出的红色激光在激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最高温度值，第二温度值为红色激光器111发出的红色激光在所激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最低温度值。处理组件13可以包括一个或多个中央处理器，或者也可以包括其他控制电路，本申请实施例对此不进行限制。
综上所述，本申请的一些实施例提供一种激光投影设备，包括激光组件、温度检测组件、处理组件以及散热器，通过温度检测组件获取红色激光器运行时的温度，并通过散热器来调控激光器的温度，以使激光器的温度在运行时能够保持在第一温度值和第二温度值之间，进而可以降低激光器在运行时的偏色程度，如此便较为全面的对激光投影设备的温度进行了控制。
激光器在通电运行后发出激光，然而激光器的光电转换效率通常为40％左右，其余电能转换为热能，也即是激光器在运行过程中会产生热量，当该热量致使激光器温度过高时，会造成激光器无法保持特定的发光率，从而造成成像画面显示问题，示例性的，如画面偏色问题。激光器发出的激光偏色程度小于指定值的最高温度值，根据激光器的规格不同，该最高温度值不同，具体的第一温度值获取方式可以从激光器生产厂商处获取，也可以通过成像画面偏色程度决定。
在一种可能的实施例中，处理组件被配置为：确定待定温度值；获取待定温度值与第一温度值对激光投影设备成像画面的色坐标的偏移率；当偏移率小于目标值时，将待定温度值确定为第二温度值；当偏移率不小于目标值时，对待定温度值进行调整，并执行获取待定温度值与第一温度值对激光投 影设备成像画面的色坐标的偏移率的步骤。
待定温度值为获取的激光器发出的激光偏色程度小于指定值的最低温度值。
由于肉眼判断出的偏色程度不够准确且每个人的判断标准不一致，因此本申请的一些实施例中使用色坐标作为颜色以及颜色偏移度的依据。色坐标是一种用物理方法定量的表达颜色的坐标图，色坐标通过x轴和y轴的数值来表示颜色，示例性的，标准红色色坐标为(0.67，0.33)，标准绿色色坐标为(0.21，0.71)，标准蓝色色坐标为(0.14，0.08)。纯正的白光色坐标为(0.33，0.33)。以成像画面的色坐标图为例，当激光器的温度过高或过低时，产生的成像画面的色坐标相较于正常温度情况下产生的成像画面色坐标发生偏移，也即是红色色坐标、绿色色坐标和蓝色色坐标的数值改变。因此通过色坐标的坐标值可以判断成像画面的偏色程度。
在全色激光器中，由于红色激光对温度的变化更为敏感，当激光器的温度过低时，红色激光的发光效率会大幅度提升，因此红色光在色坐标中的变化幅度更大，可以更为准确的获取成像画面的偏色程度，因此，在本申请的一些实施例中，选择使用红色激光器作为监测对象。
由于色坐标中红色光的变化主要体现在色坐标x轴上，因此本申请实施例中获取的为成像画面中红色在色坐标x轴上的坐标值。
在一种可能的实施方式中，处理组件还被配置为：根据预设公式确定待定温度值与第一温度值对激光投影设备成像画面的色坐标的偏移率，预设公式包括：
Figure PCTCN2021118903-appb-000001
n为偏移率，X 2为第一温度值时，成像画面中红色在色坐标x轴上的坐标值，X 1为待定温度值时，成像画面中红色在色坐标x轴上的坐标值。
待定温度值为获取的激光器发出的激光偏色程度小于指定值的最低温度值，但是该最低温度值，可能并非是最为合适的温度值，因此可以通过预设公式对该待定温度值进行检验。将该待定温度值带入上述预设公式中，当公式左边计算得到的偏移率的值小于等于n，也即是小于等于目标值时，将待定温度值确定为第二温度值。
当公式左边计算得到的偏移率的值大于n时，即表明该红光的偏移程度已经超出可接受的范围，成像画面的整体显色偏色较为明显，则该待定温度 值并非最佳待定温度值，对待定温度值进行调整。在一种可能的实施方式中，目标值可以为4％。
当偏移率小于目标值时，即表明该红光的偏移程度在可接受的范围之内，成像画面的整体显色属于正常范围内，可以将该待定温度值确定为第二温度值，该第二温度值也即是激光器发出的激光的偏色程度小于指定值的最低温度值。
当偏移率不小于目标值时，可以对待定温度值进行调整。将调整后的待定温度值重新带入预设公式中，再次判断偏移率与目标值之间的关系，上述步骤可以重复多次，直至偏移率小于目标值，将待定温度值确定为第二温度值。
在一种可能的实施方式中，散热器包括散热片以及位于散热片两侧的两个风扇，处理组件还被配置为：在第一温度值和第二温度值之间确定第三温度值；当激光器的温度高于第三温度值时，控制两个风扇同时运行；当激光器的温度低于第三温度值时，控制两个风扇中的一个风扇运行，另一个风扇关闭。
对激光器进行散热可以使用液冷散热模式或风冷散热模式，本申请的一些实施例以使用风冷散热模式为例进行说明。
图2为本申请的一些实施例提供的一种散热器的结构示意图。散热器30包括散热片31以及位于散热片31两侧的第一风扇32和第二风扇33，散热器还可以包括导热管34和导热板35，导热管34和导热板35用于传递热量，因此可以选择热传递性能较好地材质，本申请的一些实施例中使用的导热管34和导热板35为导热铜管和导热铜板。导热管34和导热板35的材质本申请在此不作限定。导热铜板的一端与导热铜管连接，另一端与散热片31连接，散热片31两侧的第一风扇32和第二风扇33相对设置，可以增加散热器的散热能力。在一种可能的实施方式中，散热片31为散热铝片，或者为其他散热效果较高的材质制成，本申请在此不作限定。导热铜板将热量吸收传递到导热铜管上，导热铜管通过相变传热原理将热量传递到散热铝片上，通过相对设置的第一风扇32和第二风扇33强制对流作用将可以更加快速的将热量散掉，从而快速降低激光器的温度。
在一种可能的实施方式中，第一温度值与第三温度值的差值，小于第三温度值和第二温度值的差值。第三温度值为第一温度值和第二温度值之间的 一个数值，第三温度值可以作为判断是否调整散热器当前散热模式的一个温度值。
散热器对激光器的温度改变需要一个过程，若当激光器的温度超出第一温度值和第二温度值之后再对散热器进行调整，则激光器仍有一段时间内温度位于可以保持正常发发光率的温度范围之外，也即是呈现画面会出现一段时间偏色严重，仍然会降低用户的观看体验。第一温度值与第三温度值的差值，也可以大于第三温度值和第二温度值的差值，即第三温度值可以为第一温度值和第二温度值之间的任意一个数值。因此本申请在第一温度值和第二温度值之间还设置了第三温度值，可以通过激光器是否到达第三温度值对散热器进行控制。
第三温度值为第一温度值和第二温度值之间更靠近最高温度值的一个任意值。当激光器的温度高于第三温度值时，激光器的温度更靠近第一温度值，也即是激光器的温度已经靠近最高温度值，此时控制散热器的两个风扇同时运行，两个风扇强制对流作用可以更加快速的对激光器进行降温。
在一种可能的实施方式中，风扇具有第一转速和第二转速，第一转速小于第二转速，处理组件还用于：当激光器的温度低于第三温度，关闭两个风扇中的一个风扇，控制另一个风扇以第一转速运行；当激光器的温度高于第一温度，控制两个风扇以第二转速运行。
在本申请的一些实施例中，两个风扇的转速可以提前设定，风扇具有第一转速和第二转速，第一转速小于第二转速，第一转速可以为最低转速，也可以为相对第二转速较低的转速，第二转速大于第一转速，第二转速可以为风扇的最高转速，也可以为相对第一转速较高的转速，具体第二转速可以根据当前温度进行调整。当激光器的温度低于第三温度时，关闭两个风扇中的一个风扇，使两个风扇中的一个风扇的转速为0，将另一个处于运行状态中的风扇的转速调整为风扇的第一转速；当激光器的温度低于第二温度时，也即是低于激光器发出的激光的偏色程度小于指定值的最低温度值时，关闭两个风扇中的一个风扇，使两个风扇中的一个风扇的转速为0，将另一个处于运行状态中的风扇的转速调整为风扇的最低转速，此时散热器的散热能力较低，可以轻微对运行过程中的激光器散热，以阻止激光器的温度过高产生偏色。
当激光器的温度逐渐升高至第三温度时，开启关闭的风扇，使该风扇以第一转速运行，另一风扇持续运行。
当环境温度过高且激光器持续运行时，激光器温度可能会超过激光器发出的激光的偏色程度小于指定值的最高温度值，也即是高于第一温度，此时将散热器中的两个风扇均开启且风速调整至第二转速，两个相对设置的风扇在较高风速下可以迅速对散热器进行降温，从而使散热器保持在第一温度与第二温度值之间，从而保证成像画面的质量。
图3为是本申请实施例示出的另一种激光投影设备的结构示意图。
激光投影设备60包括处理组件(图中未示出)、激光器61以及散热器，处理组件用于控制散热器中风扇的转速。激光投影设备60还包括照明系统62、电子卡板63以及镜头64。激光器61用于将激光输出至照明系统62、经过照明系统62成像，并通过镜头64将该成像画面输出，电子卡板63用于为激光投影设备60中的其他部件提供驱动力，并控制激光投影设备60信号的输入与输出。
在一种可能的实施方式中，散热器包括散热片31以及位于散热片31两侧的第一风扇32和第二风扇33。散热器还包括风扇组件，风扇组件至少包括两个独立的风扇，每个独立的风扇分别设置于激光投影设备60中各个部件附近，风扇组件中风扇的数量和尺寸可以随激光投影设备60的尺寸进行更改。本申请实施例中的风扇组件包括三个风扇351、352和353，三个风扇351、352和353分别设置在照明系统62、电子卡板63以及镜头64附近，照明系统62、电子卡板63以及镜头64的温度较为稳定，随环境温度变化，因此可以通过独立的风扇持续对其进行降温。在一种可能的实施方式中，处理组件位于激光投影设备60中预设的位置，处理组件同时对第一风扇32和第二风扇33以及风扇组件进行控制，也可以使用两个处理组件分别对第一风扇32和第二风扇33和风扇组件控制，处理组件的控制方式及控制数量本申请实施例在此不作限定。
在一种可能的实施例中，如图3所示，激光投影设备60中的布局如下设置，散热器中与散热片31连接的第一风扇32和第二风扇33相对设置，散热片31、第一风扇32和第二风扇33与激光器61相邻，散热器中的导热板可以与激光器61接触，并将激光器61的热量通过导热管传递至散热片31上，风扇351位于激光器61的另一侧，与第一风扇32和第二风扇33共同作用均匀的为激光器61散热。风扇352位于电子卡板63一侧，可以对电子卡板63进行降温，风扇353与第二风扇33相对设置，通过对流风对镜头64降温。本 申请的一些实施例中，第一风扇32为进风口，第二风扇33为出风口，风向为沿F方向的风路，散热器的风路不局限于沿F方向的风路，也可以是沿F方向垂直方向的风路。
综上所述，本申请的一些实施例提供一种激光投影设备，包括激光组件、温度检测组件、处理组件以及散热器，通过温度检测组件获取红色激光器运行时的温度，并通过散热器来调控激光器的温度，以使激光器的温度在运行时能够保持在第一温度值和第二温度值之间，进而可以降低激光器在运行时的偏色程度，如此便较为全面的对激光投影设备的温度进行了控制。
图4为是本申请的一些实施例示出的一种激光投影设备的散热方法的流程图，用于上述任一实施例提供的激光投影设备，包括下面几个步骤：
步骤401、获取红色激光器运行时的第一温度值，第一温度值为红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值。
步骤402、获取红色激光器运行时的第二温度值，第二温度值为红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值。
步骤403、控制散热器，以使红色激光器的温度位于第一温度值和第二温度值之间。
综上所述，本申请的一些实施例提供一种激光投影设备的散热方法，用于包括激光组件、温度检测组件、处理组件以及散热器的激光投影设备，通过温度检测组件获取红色激光器运行时的温度，并通过散热器来调控激光器的温度，以使激光器的温度在运行时能够保持在第一温度值和第二温度值之间，进而可以降低激光器在运行时的偏色程度，如此便较为全面的对激光投影设备的温度进行了控制。
图5为是本申请的一些实施例示出的另一种激光投影设备的散热方法的流程图，包括下面几个步骤：
步骤501、获取红色激光器运行时的第一温度值，第一温度值为红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值。
步骤502、确定待定温度值。
步骤503、获取待定温度值与第一温度值对激光投影设备成像画面的色坐 标的偏移率。
根据预设公式确定待定温度值与第一温度值对激光投影设备成像画面的色坐标的偏移率，预设公式包括：
Figure PCTCN2021118903-appb-000002
n为偏移率，X 2为第一温度值时，成像画面中红色在色坐标x轴上的坐标值，X 1为待定温度值时，成像画面中红色在色坐标x轴上的坐标值。
步骤504、判断偏移率是否小于目标值，当偏移率小于目标值时，执行步骤505；当偏移率不小于目标值时，执行步骤506。
步骤505、将待定温度值确定为第二温度值；执行步骤507。
步骤506、对待定温度值进行调整，并执行步骤503。
步骤507、控制散热器，以使红色激光器的温度位于第一温度值和第二温度值之间。
综上所述，本申请的一些实施例提供一种激光投影设备的散热方法，用于包括激光组件、温度检测组件、处理组件以及散热器的激光投影设备，通过温度检测组件获取红色激光器运行时的温度，并通过散热器来调控激光器的温度，以使激光器的温度在运行时能够保持在第一温度值和第二温度值之间，进而可以降低激光器在运行时的偏色程度，如此便较为全面的对激光投影设备的温度进行了控制。
图6为是本申请的一些实施例示出的一种激光投影设备的散热装置的结构示意图，该装置用于激光投影设备，激光投影设备包括激光器以及散热器。该激光投影设备的散热装置20包括：
第一温度获取模块201，被配置为获取红色激光器运行时的第一温度值，第一温度值为红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值。
第二温度获取模块202，被配置为获取红色激光器运行时的第二温度值，第二温度值为红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值。
控制模块203，被配置为控制散热器，以使红色激光器的温度位于第一温度值和第二温度值之间。
综上所述，本申请的一些实施例提供一种激光投影设备的散热装置，用于包括激光组件、温度检测组件、处理组件以及散热器的激光投影设备，通 过温度检测组件获取红色激光器运行时的温度，并通过散热器来调控激光器的温度，以使激光器的温度在运行时能够保持在第一温度值和第二温度值之间，进而可以降低激光器在运行时的偏色程度，如此便较为全面的对激光投影设备的温度进行了控制。
将图5所示的激光投影设备的散热方法用于图3中所示的激光投影设备60进行实验，具体过程如下：
环境温度为10℃-40℃之间时，激光器的温度可以维持在38-45℃之间，也即是第一温度为45℃，第二温度为38℃，在第一温度与第二温度之间确定第三温度值为43℃。当环境温度为10℃时，如果风扇组件以及第一风扇32和第二风扇33仍然正常以最低转速运行，则激光器的温度降低于38℃，达到30℃左右，低于激光器的保持正常发光率的最低温度值38℃。
使用本申请实施例提供的激光投影设备的散热方法后，当激光器的温度低于38℃时，关闭第一风扇32和第二风扇33中任意一颗风扇，令其转速为零，散热器的散热能力变弱，激光器的温度升高到38℃以上。当环境温度升高，激光器的温度随之升高，当激光器的温度将达到43℃(第三温度值)左右时，将停止转动的风扇再次启动，使该风扇以最低转速运行。此时散热器的散热能力提升，将激光器的温度降低到38℃以上。当环境温度继续升高，所有风扇正常运行，当激光器的温度高于45℃时，提升第一风扇32和第二风扇33的转速，散热器的散热能力提高，将激光器的温度降低到45℃以下。使用以上散热方法，激光器的温度控制在38-45℃之间，激光器的三色激光均保持正常的发光率，成像画面显色正常，提高了成像画面的质量和用户的观看体验，同时延长了激光器的使用寿命。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种激光投影设备，包括激光组件、温度检测组件、处理组件以及散热器，所述激光组件包括至少两种颜色的激光器，所述至少两种颜色的激光器中包括红色激光器；
    所述温度检测组件用于获取所述红色激光器运行时的温度；
    所述处理组件用于控制所述散热器对所述红色激光器进行散热，以使所述红色激光器的温度位于第一温度值和第二温度值之间，所述第一温度值为所述红色激光器发出的红色激光在激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最高温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备的成像画面中颜色比例的偏离程度小于指定值的最低温度值。
  2. 根据权利要求1所述的激光投影设备，其中，所述处理组件用于：
    确定待定温度值；
    获取所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率；
    当所述偏移率小于目标值时，将所述待定温度值确定为所述第二温度值；
    当所述偏移率不小于所述目标值时，对所述待定温度值进行调整，并执行所述获取所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率的步骤。
  3. 根据权利要求2所述的激光投影设备，其中，所述处理组件还用于：根据预设公式确定所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率，所述预设公式包括：
    Figure PCTCN2021118903-appb-100001
    所述n为所述偏移率，所述X 2为所述第一温度值时，所述成像画面中红色在色坐标x轴上的坐标值，所述X 1为所述待定温度值时，所述成像画面中所述红色在所述色坐标x轴上的坐标值。
  4. 根据权利要求1所述的激光投影设备，其中，所述散热器包括散热片 以及位于所述散热片两侧的两个风扇，
    所述处理组件还用于：在所述第一温度值和所述第二温度值之间确定第三温度值；
    当所述激光器的温度高于所述第三温度值时，控制所述两个风扇同时运行；
    当所述激光器的温度低于所述第三温度值时，控制所述两个风扇中的一个风扇运行，另一个风扇关闭。
  5. 根据权利要求4所述的激光投影设备，其中，所述风扇具有第一转速和第二转速，所述第一转速小于所述第二转速，
    所述处理组件还用于：
    当所述激光器的温度低于所述第三温度，关闭所述两个风扇中的一个风扇，控制另一个风扇以所述第一转速运行；
    当所述激光器的温度高于所述第一温度，控制所述两个风扇以所述第二转速运行。
  6. 根据权利要求4所述的激光投影设备，其中，所述第一温度值与所述第三温度值的差值，小于所述第三温度值和所述第二温度值的差值。
  7. 一种激光投影设备的散热方法，用于激光投影设备，所述激光投影设备包括激光组件以及散热器，所述激光组件包括至少两种颜色的激光器，所述至少两种颜色的激光器中包括红色激光器，所述方法包括：
    获取所述红色激光器运行时的第一温度值，所述第一温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值；
    获取所述红色激光器运行时的第二温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值；
    控制所述散热器，以使所述红色激光器的温度位于所述第一温度值和所述第二温度值之间。
  8. 根据权利要求7所述的方法，其中，所述获取所述红色激光器运行时的第二温度值，包括：
    确定待定温度值；
    获取所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率；
    当所述偏移率小于目标值时，将所述待定温度值确定为所述第二温度值；
    当所述偏移率不小于所述目标值时，对所述待定温度值进行调整，并执行所述获取所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率的步骤。
  9. 根据权利要求8所述的方法，其中，所述获取所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率，包括：
    根据预设公式确定所述待定温度值与所述第一温度值对所述激光投影设备成像画面的色坐标的偏移率，所述预设公式包括：
    Figure PCTCN2021118903-appb-100002
    所述n为所述偏移率，所述X 2为所述第一温度值时，所述成像画面中红色在色坐标x轴上的坐标值，所述X 1为所述待定温度值时，所述成像画面中所述红色在所述色坐标x轴上的坐标值。
  10. 一种激光投影设备的散热装置，用于激光投影设备，所述激光投影设备包括激光器以及散热器，所述装置包括：
    第一温度获取模块，用于获取所述红色激光器运行时的第一温度值，所述第一温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最高温度值；
    第二温度获取模块，用于获取所述红色激光器运行时的第二温度值，所述第二温度值为所述红色激光器发出的红色激光在所激光投影设备成像画面中颜色比例的偏离程度小于指定值的最低温度值；
    控制模块，用于控制所述散热器，以使所述红色激光器的温度位于所述第一温度值和所述第二温度值之间。
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