A method and apparatus for testing the heat dissipation performance of a projector

Abstract

This application provides a method and apparatus for testing the heat dissipation performance of a projector. The method includes: acquiring a first temperature parameter at the moment the projector reaches thermal equilibrium in a first scenario; acquiring a second temperature parameter at the moment the projector reaches thermal equilibrium in a second scenario; obtaining heat dissipation characteristic parameters based on the first temperature parameter, the second temperature parameter, and preset rules; and determining that the heat dissipation performance is qualified if the heat dissipation characteristic parameters meet a first condition. This invention has the following advantages: it acquires temperature data of the optical engine light source reaching thermal equilibrium twice under different fan speeds, obtains heat dissipation characteristic parameters from the two sets of temperature data according to preset rules, and finally compares them using preset judgment rules to determine whether the projector's heat dissipation performance is qualified. Because the judgment rules incorporate environmental temperature compensation parameters and system error compensation parameters, it can quickly and accurately detect the projector's heat dissipation performance when the environmental temperature is abnormal, without requiring manual operation.

Description

Technical Field

[0001] This invention relates to the field of projector technology, and more specifically to a method and apparatus for testing the heat dissipation performance of a projector. Background Technology

[0002] A projector is a device that projects digital images onto a screen. With the continuous development of projector technology (mainly in terms of resolution, brightness, and ease of use), people are becoming more and more accepting of projectors, and their application areas are becoming wider and wider. We can see projectors everywhere, from homes to various public places.

[0003] The heat dissipation performance of a projector is a crucial factor affecting its stability and normal operation. During projector manufacturing, heat dissipation performance is tested to prevent substandard products from reaching consumers. Current technology typically tests projector heat dissipation performance by measuring the absolute temperature of key components using thermocouples or thermistors, comparing these values ​​to design specifications to determine heat dissipation performance. However, this approach ignores the influence of ambient temperature. For example, during testing, if the projector's heat dissipation performance fails to meet requirements and its temperature should be higher, the absolute temperature might be lower due to the low ambient temperature, resulting in inaccurate test results that do not accurately reflect the projector's performance. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is how to avoid the influence of ambient temperature, thereby providing a more accurate and efficient method for testing the heat dissipation performance of projectors.

[0005] To address the aforementioned technical problems, the present invention discloses at least one method and apparatus for testing the heat dissipation performance of a projector.

[0006] In a first aspect, the present invention discloses a method for testing the heat dissipation performance of a projector, characterized by comprising the following steps:

[0007] Obtain the first temperature parameter at the moment when the projector reaches thermal equilibrium in the first scenario;

[0008] Obtain the second temperature parameter at the moment when the projector reaches thermal equilibrium in the second scenario;

[0009] The heat dissipation characteristic parameters are obtained based on the first temperature parameter, the second temperature parameter, and the preset calculation rules;

[0010] If the heat dissipation characteristic parameters meet the first condition, the heat dissipation performance of the projector is deemed qualified.

[0011] Preferably, obtaining the first temperature parameter at the moment when the projector reaches thermal equilibrium in the first scenario includes:

[0012] Turn off the projector's optical engine source and adjust the fan to run at its first speed for the first time.

[0013] If the projector reaches thermal equilibrium, the first temperature parameter of the optical engine light source is obtained;

[0014] The first temperature parameter is obtained through a temperature sensor;

[0015] The first temperature parameter includes the red lamp temperature T0 of the optomechanical light source.

[0016] Preferably, obtaining the second temperature parameter at the moment when the projector reaches thermal equilibrium in the second scenario includes:

[0017] Turn on the projector's optical engine light source and adjust the fan to run at the second speed for the second time.

[0018] If the projector reaches thermal equilibrium, then the second temperature parameter of the optical engine light source is obtained;

[0019] The second temperature parameter is obtained through a temperature sensor;

[0020] The second temperature parameter includes the red lamp temperature T1, the green lamp temperature T2, and the blue lamp temperature T3 of the optomechanical light source.

[0021] Preferably, T0 is calculated using formula (1);

[0022] T0 = ​​(T 01 +T 02 +T 03 +T 04 +T 05 ) / 5; (1)

[0023] Among them, T 01 T 02 T 03 T 04 and T 05 These are the temperatures of the red lights obtained by the projector every 4 seconds in the first scene.

[0024] Preferably, T1, T2, and T3 are calculated using formulas (2), (3), and (4), respectively;

[0025] T1=(T 11 +T 12 +T 13 +T 14 +T 15 ) / 5; (2)

[0026] T2 = (T 21 +T 22 +T 23 +T 24 +T25 ) / 5; (3)

[0027] T3 = (T 31 +T 32 +T 33 +T 34 +T 35 ) / 5; (4)

[0028] Among them, T 11 T 12 T 13 T 14 and T 15 These are the temperatures of the red lights obtained by the projector every 4 seconds in the second scene; T 21 T 22 T 23 T 24 and T 25 These are the temperatures of the green light obtained by the projector every 4 seconds in the second scene; T 31 T 32 T 33 T 34 and T 35 These are the blue light temperatures measured by the projector every 4 seconds in the second scene.

[0029] Preferably, the heat dissipation characteristic parameters include: ΔT1, ΔT2, and ΔT3;

[0030] The preset calculation rules are: △T1=|T1-T0|; △T2=|T2-T0|; △T3=|T3-T0|.

[0031] Preferably, the heat dissipation characteristic parameters satisfying the first condition include:

[0032] When T0 is greater than 25 o At time C, the heat dissipation characteristic parameters simultaneously satisfy formulas (5), (6), and (7):

[0033] △T1 <T r +(T0-25)*k1+k2; (5)

[0034] △T2 <T g +(T0-25)*k3+k2; (6)

[0035] △T3 <T b +(T0-25)*k1+k2; (7)

[0036] When T0 is less than or equal to 25 o At time C, the heat dissipation characteristic parameters simultaneously satisfy formulas (8), (9), and (10):

[0037] △T1 <Tr +k2; (8)

[0038] △T1 <T g +k2; (9)

[0039] △T1 <T b +k2; (10)

[0040] Where k1 and k3 are environmental temperature compensation parameters, and k2 is a system error compensation parameter, and k1, k2, and k3 are all constants less than 1; where T r T g and T b These are the standard temperature characteristic values ​​of the red, green, and blue lights obtained by formulas (11), (12), and (13), respectively.

[0041] T r = (T r1 +T r2 +T r3 +T r4 +T r5 ) / 5; (11)

[0042] T g = (T g1 +T g2 +T g3 +T g4 +T g5 ) / 5; (12)

[0043] T b = (T b1 +T b2 +T b3 +T b4 +T b5 ) / 5; (13)

[0044] Among them, T r1 T r2 T r3 T r4 and T r5 They are at 25 o C represents the temperature of the red light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the red light obtained every 4 seconds. g1 T g2 T g3 T g4 and T g5 They are at 25 o C represents the temperature of the green light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the green light obtained every 4 seconds. b1 T b2 T b3 T b4 and T b5They are at 25 o The blue light temperature measured every 4 seconds when the projector reaches thermal equilibrium at room temperature.

[0045] Preferably, the second time is longer than the first time.

[0046] Preferably, the second rotational speed is less than the first rotational speed.

[0047] Secondly, the present invention also provides a projector device, comprising: an optical engine, a motherboard, a CPU, a fan, a motor, a heat sink, a housing, a temperature sensor, an air inlet, and an air outlet. When the projector device is in operation, it performs the steps of any of the possible implementations in the first aspect described above.

[0048] The technical solution provided by the embodiments of the present invention has the following beneficial effects: two sets of temperature data are obtained when the optical engine light source reaches thermal equilibrium twice under different fan speeds, the two sets of temperature data are calculated into heat dissipation characteristic parameters according to preset rules, and finally compared with preset judgment rules to determine whether the heat dissipation performance of the projector is qualified. Since the judgment rules include ambient temperature compensation parameters and system error compensation parameters, it can ensure that the heat dissipation performance of the projector can be detected quickly and accurately even under abnormal ambient temperature conditions, without any manual operation.

[0049] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 A flowchart of a projector heat dissipation performance testing method provided by an embodiment of the present invention is shown;

[0052] Figure 2 A flowchart is shown below for another method for testing the heat dissipation performance of a projector provided in an embodiment of the present invention.

[0053] Figure 3 A schematic diagram of the planar structure of a projector device provided in an embodiment of the present invention is shown.

[0054] 1-Optical engine; 2-Motherboard; 3-CPU; 4-Fan;

[0055] 5-Motor; 6-Radiator; 7-Housing;

[0056] 8-Temperature sensor; 9-Air inlet; 10-Air outlet. Detailed Implementation

[0057] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0058] Example 1

[0059] Reference Figure 1 The present invention discloses a method for testing the heat dissipation performance of a projector, comprising the following steps:

[0060] S101: Obtain the first temperature parameter at the moment when the projector reaches thermal equilibrium in the first scenario;

[0061] S102: Obtain the second temperature parameter at the moment when the projector reaches thermal equilibrium in the second scenario;

[0062] S103: Obtain heat dissipation characteristic parameters based on the first temperature parameter, the second temperature parameter, and preset calculation rules;

[0063] S104: If the heat dissipation characteristic parameters meet the first condition, the heat dissipation performance of the projector is determined to be qualified.

[0064] Specifically, existing LED projectors use red, green, and blue LEDs as their internal light sources, laser projectors use LED beads as their light source, and LCD projectors use bulbs as their light source. This invention uses an LED projector as an example to illustrate the embodiments.

[0065] Specifically, the first temperature parameter and the second temperature parameter are obtained using the temperature sensor 8. In a preferred embodiment, the temperature sensor 8 can be set inside the projector housing 7. In practical applications, in order to improve the accuracy of judgment, a temperature sensor is set on each lamp of the optical engine, and the temperature data is read through the projector.

[0066] Specifically, heat dissipation performance testing is one of a series of tests conducted during the production of a projector. First, it's necessary to determine if the previous test has been completed to ensure the correct procedure is followed. The previous test in this case is white balance calibration, which will not be elaborated upon here. In practical applications, other tests may be used, and this invention does not specifically limit the scope of these tests.

[0067] During the test, first check if there are any previous heat dissipation performance test results. If so, there is no need to repeat the test; otherwise, start the heat dissipation performance test program.

[0068] To initiate the thermal monitoring program, first, turn off the optical engine light source and run the fan at 100% duty cycle for a first time, specifically 15 minutes. After reaching the first thermal equilibrium, obtain and record the red light temperature T0 of the optical engine using temperature sensor 8. Next, turn on the optical engine light source and run the fan at 50% duty cycle for a second time, specifically 20 minutes. After reaching the second thermal equilibrium, obtain and record the red light temperature T1, green light temperature T2, and blue light temperature T3 of the optical engine using temperature sensor 8. It is best to have a certain interval between the second and first thermal equilibrium times; if the interval is too short, the second thermal equilibrium may not be reached.

[0069] In this embodiment, all fans are PWM fans, and the fan speed is adjusted by PWM algorithm. PWM (Pulse Width Modulation) is an existing technology, and will not be described in detail here.

[0070] Thermal equilibrium refers to the state where the internal temperature of an object in contact with its surroundings is uniform and equal to the external temperature. At thermal equilibrium, there is no heat exchange between the different parts of the object or between the object and its surroundings. In thermodynamics and chemistry, an object is also said to be in thermal equilibrium if the heat absorbed and released by it in the same amount of time exactly cancels out. In a projector, reaching thermal equilibrium means that the temperature reaches a certain value and then remains essentially stable, with no further large-scale temperature increases, only small-scale temperature fluctuations. In this embodiment, based on the temperature change characteristics of the projector, the criterion for determining whether thermal equilibrium has been reached is defined as follows:

[0071] First thermal equilibrium: The red light temperature data is read every 4 seconds. When the difference between the maximum and minimum red light temperatures for 5 consecutive readings is ≤0.5℃, the projector's internal temperature is considered to have reached thermal equilibrium. The first temperature parameter T0 is recorded and calculated according to formula (1):

[0072] T0 = ​​(T 01 +T 02 +T 03 +T 04 +T 05 ) / 5; (1)

[0073] Among them, T 01 T 02 T 03 T 04 and T 05 These are the temperatures of the red lights obtained by the projector every 4 seconds in the first scene.

[0074] Second thermal equilibrium: Temperature data for the red, green, and blue lights are continuously read every 4 seconds. When the difference between the maximum and minimum temperatures of each light for 5 consecutive readings is ≤0.5℃, the internal temperature of the projector is considered to have reached thermal equilibrium. The second temperature parameters T1, T2, and T3 are recorded and calculated according to formulas (2), (3), and (4):

[0075] T1=(T 11 +T 12 +T 13 +T 14 +T 15 ) / 5; (2)

[0076] T2 = (T 21 +T 22 +T 23 +T 24 +T 25 ) / 5; (3)

[0077] T3 = (T 31 +T 32 +T 33 +T 34 +T 35 ) / 5; (4)

[0078] Among them, T 11 T 12 T 13 T 14 and T 15 These are the temperatures of the red lights obtained by the projector every 4 seconds in the second scene; T 21 T 22 T 23 T 24 and T 25 These are the green light temperatures measured by the projector every 4 seconds in the second scene; T 31 T 32 T 33 T 34 and T 35 These are the blue light temperatures measured by the projector every 4 seconds in the second scene.

[0079] Next, the heat dissipation characteristic parameters △T1, △T2 and △T3 are calculated according to the preset calculation rules; the preset calculation rules are: △T1=|T1-T0|; △T2=|T2-T0|; △T3=|T3-T0|.

[0080] Specifically, after obtaining the heat dissipation characteristic parameters, the heat dissipation performance of the projector is determined according to preset judgment rules. The specific judgment process includes:

[0081] (1) When T0 is greater than 25 o When C, determine whether the heat dissipation characteristic parameters simultaneously satisfy formulas (5), (6), and (7):

[0082] △T1 <T r +(T0-25)*k1+k2; (5)

[0083] △T2 <T g +(T0-25)*k3+k2; (6)

[0084] △T3 <T b +(T0-25)*k1+k2; (7)

[0085] Under these conditions, when the heat dissipation characteristic parameters simultaneously satisfy formulas (5), (6) and (7), the heat dissipation performance of the projector is deemed qualified. For the specific determination structure, please refer to Table 1.

[0086] Table 1 When T0 is greater than 25 o Results of heat dissipation characteristic parameters at time C

[0087]

[0088] (2) When T0 is less than or equal to 25 o When C, determine whether the heat dissipation characteristic parameters simultaneously satisfy formulas (8), (9), and (10):

[0089] △T1 <T r +k2; (8)

[0090] △T1 <T g +k2; (9)

[0091] △T1 <T b +k2; (10)

[0092] Wherein, k1 and k3 are environmental temperature compensation parameters, k2 is an error compensation parameter, and k1, k2, and k3 are all constants less than 1; more preferably, k1 is 0.11, k2 is 0.5, and k3 is 0.1; where T r T g and T b These are the standard temperature characteristic values ​​of the red, green, and blue lights obtained by formulas (11), (12), and (13), respectively.

[0093] T r = (T r1 +T r2 +T r3 +T r4 +T r5 ) / 5; (11)

[0094] T g = (T g1 +T g2 +T g3 +T g4 +T g5 ) / 5; (12)

[0095] T b = (T b1 +T b2 +T b3 +T b4 +T b5 ) / 5; (13)

[0096] Among them, T r1 T r2 T r3 T r4 and T r5 They are at 25 o C represents the temperature of the red light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the red light obtained every 4 seconds. g1 T g2 T g3 T g4 and T g5 They are at 25 o C represents the temperature of the green light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the green light obtained every 4 seconds. b1 T b2 T b3 T b4 and T b5 They are at 25 o The blue light temperature measured every 4 seconds when the projector reaches thermal equilibrium at room temperature.

[0097] Under this condition, when the heat dissipation characteristic parameters simultaneously satisfy formulas (8), (9) and (10), the heat dissipation performance of the projector is deemed qualified. For the specific determination structure, please refer to Table 2.

[0098] Table 2 When T0 is less than or equal to 25 o Results of heat dissipation characteristic parameters at time C

[0099]

[0100] Example 2

[0101] Specifically, after completing the above-mentioned projection heat dissipation performance test, the method further includes: if the heat dissipation performance is qualified, storing the last qualified first temperature parameter and second temperature parameter and displaying them on the projector screen; if the heat dissipation performance test is unqualified, storing the last unqualified first temperature parameter and second temperature parameter and displaying them on the projection screen, and at the same time, turning off the projector with unqualified heat dissipation performance and improving the projector's heat dissipation performance until the test is qualified.

[0102] Improving the heat dissipation performance of a projector requires manual operation, which is an existing technology. This may include properly attaching the thermal interface material, locking the heat sink, and properly using foam to construct air ducts. Any operation that can improve the heat dissipation performance of the projector is feasible, and this invention does not limit it.

[0103] Example 3

[0104] Reference Figure 3 This invention discloses a projector device, comprising: an optical engine 1, a motherboard 2, a CPU 3, a fan 4, a motor 5, a heat sink 6, a housing 7, a temperature sensor 8, an air inlet 9, and an air outlet 10.

[0105] During the test, first check if there are any previous heat dissipation performance test results. If so, there is no need to repeat the test; otherwise, start the heat dissipation performance test program.

[0106] To initiate the thermal monitoring program, first, turn off the optical engine light source and run the fan at 100% duty cycle for a first time, specifically 15 minutes. After reaching the first thermal equilibrium, obtain and record the red light temperature T0 of the optical engine using temperature sensor 8. Next, turn on the optical engine light source and run the fan at 50% duty cycle for a second time, specifically 20 minutes. After reaching the second thermal equilibrium, obtain and record the red light temperature T1, green light temperature T2, and blue light temperature T3 of the optical engine using temperature sensor 8. It is best to have a certain interval between the second and first thermal equilibrium times; if the interval is too short, the second thermal equilibrium may not be reached.

[0107] First thermal equilibrium: The red light temperature data is read every 4 seconds. When the difference between the maximum and minimum red light temperatures for 5 consecutive readings is ≤0.5℃, the projector's internal temperature is considered to have reached thermal equilibrium. The first temperature parameter T0 is recorded and calculated according to formula (1):

[0108] T0 = ​​(T 01 +T 02 +T 03 +T 04 +T 05 ) / 5; (1)

[0109] Among them, T01 T 02 T 03 T 04 and T 05 These are the temperatures of the red lights obtained by the projector every 4 seconds in the first scene.

[0110] Second thermal equilibrium: The temperature data of the red, green and blue lights are read every 4 seconds. When the difference between the maximum and minimum temperature of each light for 5 consecutive times is ≤0.5℃, it is determined that the internal temperature of the projector has reached thermal equilibrium.

[0111] Next, the heat dissipation characteristic parameters △T1, △T2 and △T3 are calculated according to the preset calculation rules; the preset calculation rules are: △T1=|T1-T0|; △T2=|T2-T0|; △T3=|T3-T0|.

[0112] Specifically, after obtaining the heat dissipation characteristic parameters, the heat dissipation performance of the projector is determined according to the preset judgment rules. The specific judgment process is the same as in Embodiment 1 of the present invention, and will not be repeated in this embodiment.

[0113] The projector device of this embodiment has the following technical effects: it acquires two sets of temperature data when the optical engine light source reaches thermal equilibrium twice under different fan speeds, calculates the heat dissipation characteristic parameters of the two sets of temperature data according to preset rules, and finally compares them with preset judgment rules to determine whether the heat dissipation performance of the projector is qualified. Since the judgment rules include ambient temperature compensation parameters and system error compensation parameters, it can ensure that the heat dissipation performance of the projector can be detected quickly and accurately even under abnormal ambient temperature conditions, without any manual operation.

[0114] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0115] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.

[0116] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0117] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0118] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0119] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0120] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0121] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for testing the heat dissipation performance of a projector, characterized in that, Includes the following steps: Obtain the first temperature parameter at the moment when the projector reaches thermal equilibrium in the first scenario; Obtain the second temperature parameter at the moment when the projector reaches thermal equilibrium in the second scenario; The heat dissipation characteristic parameters are obtained based on the first temperature parameter, the second temperature parameter, and the preset calculation rules; If the heat dissipation characteristic parameters meet the first condition, the heat dissipation performance of the projector is determined to be qualified. The first temperature parameter obtained when the projector reaches thermal equilibrium in the first scenario includes: Turn off the projector's optical engine source and adjust the fan to run at its first speed for the first time. If the projector reaches thermal equilibrium, the first temperature parameter of the optical engine light source is obtained; The first temperature parameter is obtained through a temperature sensor; The first temperature parameter includes the red lamp temperature T0 of the optomechanical light source; The second temperature parameter obtained when the projector reaches thermal equilibrium in the second scenario includes: Turn on the projector's optical engine light source and adjust the fan to run at the second speed for the second time. If the projector reaches thermal equilibrium, then the second temperature parameter of the optical engine light source is obtained; The second temperature parameter is obtained through a temperature sensor; The second temperature parameter includes the red lamp temperature T1, green lamp temperature T2, and blue lamp temperature T3 of the optomechanical light source; The T0 is calculated using formula (1); T0=(T 01 +T 02 +T 03 +T 04 +T 05 ) / 5(1); Among them, T 01 T 02 T 03 T 04 and T 05 These are the temperatures of the red lights obtained by the projector every 4 seconds in the first scene; T1, T2 and T3 are calculated by formulas (2), (3) and (4) respectively; T1=(T 11 +T 12 +T 13 +T 14 +T 15 ) / 5(2); T2=(T 21 +T 22 +T 23 +T 24 +T 25 ) / 5(3); T3=(T 31 +T 32 +T 33 +T 34 +T 35 ) / 5(4); Among them, T 11 T 12 T 13 T 14 and T 15 These are the temperatures of the red lights obtained by the projector every 4 seconds in the second scene; T 21 T 22 T 23 T 24 and T 25 These are the temperatures of the green light obtained by the projector every 4 seconds in the second scene; T 31 T 32 T 33 T 34 and T 35 These are the blue light temperatures measured by the projector every 4 seconds in the second scene.

2. The method for testing the heat dissipation performance of a projector according to claim 1, characterized in that, The heat dissipation characteristic parameters include: ΔT1, ΔT2, and ΔT3; The preset calculation rules are: △T1=|T1-T0|; △T2=|T2-T0|; △T3=|T3-T0|.

3. The method for testing the heat dissipation performance of a projector according to claim 2, characterized in that, The heat dissipation characteristic parameters satisfying the first condition include: When T0 is greater than 25 o At time C, the heat dissipation characteristic parameters simultaneously satisfy formulas (5), (6), and (7): △T1<T r +(T0-25)*k1+k2(5); △T2 <T g +(T0-25)*k3+k2(6); △T3<T b +(T0-25)*k1+k2(7); When T0 is less than or equal to 25 o At time C, the heat dissipation characteristic parameters simultaneously satisfy formulas (8), (9), and (10): △T1<T r +k2(8); △T1<T g +k2(9); △T1<T b +k2(10); Where k1 and k3 are environmental temperature compensation parameters, and k2 is a system error compensation parameter, and k1, k2, and k3 are all constants less than 1; where T r T g and T b These are the standard temperature characteristic values ​​of the red, green, and blue lights obtained by formulas (11), (12), and (13), respectively. T r =(T r1 +T r2 +T r3 +T r4 +T r5 ) / 5(11); T g =(T g1 +T g2 +T g3 +T g4 +T g5 ) / 5(12); T b =(T b1 +T b2 +T b3 +T b4 +T b5 ) / 5(13); Among them, T r1 T r2 T r3 T r4 and T r5 They are at 25 o C represents the temperature of the red light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the red light obtained every 4 seconds. g1 T g2 T g3 T g4 and T g5 They are at 25 o C represents the temperature of the green light obtained every 4 seconds when the projector reaches thermal equilibrium at room temperature; T represents the temperature of the green light obtained every 4 seconds. b1 T b2 T b3 T b4 and T b5 They are at 25 o The blue light temperature measured every 4 seconds when the projector reaches thermal equilibrium at room temperature.

4. The method for testing the heat dissipation performance of a projector according to claim 3, characterized in that, The second time is greater than the first time.

5. The method for testing the heat dissipation performance of a projector according to claim 4, characterized in that, The second rotational speed is less than the first rotational speed.

6. A projector device, characterized in that, include: The projector device comprises an optical engine, a motherboard, a CPU, a fan, a motor, a heat sink, a housing, a temperature sensor, an air inlet, and an air outlet. When the projector device is in operation, it performs the method as described in any one of claims 1-5.

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