Control system, method and projector apparatus for a light source module

Abstract

The application relates to a control system and method of a light source module and a projector device. The control system of the light source module comprises a light source module, a temperature detection module and a controller. The light source module comprises a light emitting assembly for providing a light source. The temperature detection module comprises a first temperature sensor and a second temperature sensor. The first temperature sensor is used for detecting an ambient temperature in the light source module to obtain first temperature information, and the second temperature sensor is used for detecting a working temperature of the light emitting assembly to obtain second temperature information. The controller is connected with the first temperature sensor and the second temperature sensor respectively, is used for receiving the first temperature information and the second temperature information, and feeds back and adjusts the working temperature of the light source module according to the first temperature information and the second temperature information, so that the working temperature of the light source module is maintained in a preset temperature range. The control system of the light source module can stabilize the working state of the projector in the working process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projectors, in particular to a light source module control system and method, and a projector device. BACKGROUND

[0002] Projectors can be used to display still or dynamic images, and generally include a light engine and a light source module. A plurality of RGB three-color laser tubes are arranged in the light source module, each laser tube emits color light of a specific intensity based on a preset color ratio. The RGB three-color laser light is combined by an optical element group inside the light source module, and then the combined white light beam is emitted to the light engine. The light engine uses the received light beam as a light source to generate a specific image.

[0003] However, the projector currently has the problem of unstable working state during operation. SUMMARY

[0004] Therefore, it is necessary to provide a light source module control system and method, and a projector device, which can stabilize the working state of the projector during operation.

[0005] A light source module control system comprises:

[0006] A light source module comprising a light emitting assembly for providing a light source;

[0007] A temperature detection module comprising a first temperature sensor and a second temperature sensor, the first temperature sensor being configured to detect an ambient temperature in the light source module to obtain first temperature information, and the second temperature sensor being configured to detect a working temperature of the light emitting assembly to obtain second temperature information;

[0008] A controller connected to the first temperature sensor and the second temperature sensor, respectively, configured to receive the first temperature information and the second temperature information, and to adjust the working temperature of the light source module based on feedback of the first temperature information and the second temperature information, so that the working temperature of the light source module is maintained within a preset temperature range.

[0009] In one embodiment, the light source module further comprises a housing, a base, and a light combiner, the light combiner is arranged at the light emitting position of the light emitting assembly, the housing and the base cooperate to form a receiving cavity for accommodating the light emitting assembly and the light combiner, and the first temperature sensor is arranged at the inner side wall of the housing, the side of the base close to the receiving cavity, the light emitting position of the light emitting assembly, and / or the light emitting position of the light combiner.

[0010] In one embodiment, the light source module further comprises a housing, a base, and a light combiner, the light combiner is arranged at the light emitting position of the light emitting assembly, the housing and the base cooperate to form a receiving cavity for accommodating the light emitting assembly and the light combiner, and the first temperature sensor is arranged at the inner side wall of the housing, the side of the base close to the receiving cavity, the light emitting position of the light emitting assembly, and / or the light emitting position of the light combiner.

[0011] The water cooling module comprises a water cooling machine and a water cooling pipe, the water cooling pipe is arranged at the light emitting assembly, the water cooling machine is connected with the water cooling pipe, and the water cooling machine is used for adjusting the flow rate of circulating cooling water in the water cooling pipe to adjust the working temperature of the light emitting assembly.

[0012] In one of the embodiments, the second temperature sensor is arranged at the water cooling module and is used for detecting the temperature of the circulating cooling water to obtain the working temperature of the light emitting assembly.

[0013] In one of the embodiments, the method further comprises:

[0014] The current detection module is connected with the light emitting assembly and the controller respectively, and is used for detecting the driving current of the light emitting assembly and sending the driving current to the controller.

[0015] The controller is further used for adjusting the RGB proportion output by the light source module according to the driving current feedback to maintain the RGB proportion output by the light source module at a preset proportion.

[0016] In one of the embodiments, the controller is further used for determining whether the working temperature of the light source module exceeds a preset temperature range according to the first temperature information and the second temperature information, determining whether the driving current of the light source module is abnormal if the working temperature of the light source module exceeds the preset temperature range, and feeding back to adjust the working temperature of the light source module to return to the preset temperature range if the driving current of the light source module is normal.

[0017] A control method of a light source module, the light source module comprising a light emitting assembly, the method comprising:

[0018] First temperature information and second temperature information are acquired respectively, wherein the first temperature information is obtained by detecting the ambient temperature in the light source module by a first temperature sensor, and the second temperature information is obtained by detecting the working temperature of the light emitting assembly by a second temperature sensor.

[0019] The first temperature information and the second temperature information are received, and the working temperature of the light source module is adjusted according to the first temperature information and the second temperature information feedback to maintain the working temperature of the light source module in a preset temperature range.

[0020] In one of the embodiments, the working temperature of the light source module is adjusted according to the first temperature information and the second temperature information feedback, comprising:

[0021] It is determined whether the working temperature of the light source module exceeds a preset temperature range according to the first temperature information and the second temperature information.

[0022] If the operating temperature of the light source module is out of the preset temperature range, it is determined whether the driving current of the light source module is abnormal.

[0023] If the driving current of the light source module is normal, the operating temperature of the light source module is feedback adjusted to recover to the preset temperature range.

[0024] In one of the embodiments, the method further comprises:

[0025] According to the first temperature information and the second temperature information, it is determined whether the driving current of the light source module is abnormal.

[0026] If the driving current is abnormal, the RGB ratio output by the light source module is feedback adjusted to maintain at a preset ratio.

[0027] In one of the embodiments, the step of determining whether the driving current of the light source module is abnormal comprises:

[0028] According to the first temperature information, a first temperature change rate of the ambient temperature is determined, and according to the second temperature information, a second temperature change rate of the operating temperature of the light emitting component is determined.

[0029] If the first temperature change rate exceeds a first change rate threshold, and / or the second temperature change rate exceeds a second change rate threshold, it is determined that the driving current of the light source module is abnormal.

[0030] In one of the embodiments, the light source module comprises a first color laser tube, a second color laser tube and a third color laser tube, the number of the first color laser tube is the most, the number of the third color laser tube is the least, the difference between the number of the second color laser tube and the third color laser tube is less than a difference threshold, the driving currents of the laser tubes of different colors are the same when the light source module is normally operating, and the method further comprises:

[0031] If the first temperature change rate and the second temperature change rate are both within a first range, it is determined that the driving current of the first laser tube is abnormal, and / or;

[0032] If the first temperature change rate is within a second range, and the second temperature change rate is within a third range, it is determined that the driving current of the second laser tube or the third laser tube is abnormal, and / or;

[0033] If the first temperature change rate is within the second range, and the second temperature change rate is within a fourth range, it is determined that the driving current of the third laser tube is abnormal, and / or;

[0034] If the second temperature change rate is within a fifth range, it is determined that the driving current of the third laser tube is abnormal.

[0035] wherein the first range > the second range > the third range > the fourth range > the fifth range.

[0036] A projector device comprising a control system of a light source module as described above.

[0037] The control system, the method and the projector device of the light source module as described above, the control system of the light source module comprises a light source module, a temperature detection module and a controller, the light source module comprises a light emitting assembly for providing a light source; the temperature detection module comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is used for detecting the ambient temperature in the light source module to obtain first temperature information, and the second temperature sensor is used for detecting the working temperature of the light emitting assembly to obtain second temperature information; the controller is connected with the first temperature sensor and the second temperature sensor respectively, is used for receiving the first temperature information and the second temperature information, and adjusts the working temperature of the light source module according to the feedback of the first temperature information and the second temperature information, so that the working temperature of the light source module is maintained in a preset temperature range. Since the controller can adjust the working temperature of the light source module to be maintained in the preset temperature range according to the feedback of the first temperature information and the second temperature information, the working temperature of the light source module can be kept normal, the problem of unstable working state of the projector caused by the working temperature of the light source module exceeding the preset temperature range is avoided, and the stable working state of the projector in the working process is realized. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A structural schematic diagram of a control system of a light source module provided for an embodiment;

[0040] Figure 2 A structural schematic diagram of another control system provided for an embodiment;

[0041] Figure 3 A structural schematic diagram of another control system provided for an embodiment;

[0042] Figure 4 A flowchart of a control method of a light source module provided for an embodiment;

[0043] Figure 5A structural schematic diagram of a projector device is provided for an embodiment. DETAILED DESCRIPTION

[0044] For the purpose of understanding the present application, a more complete description of the application will be provided with reference to the accompanying drawings. The drawings provided herein are for illustrative purposes only and therefore are not intended to limit the present application, as the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0046] It is to be understood that the terms “first”, “second”, and so on used herein can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0047] Spatially relative terms, such as “under”, “below”, “lower”, “on”, “above”, “upper” and the like, can be used herein for ease of description to describe one element or feature’s relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or operation in addition to the orientations depicted in the figures. For example, if a device is turned over, elements described as “below” or “under” other elements or features would then be oriented “above” the other elements or features. Thus, the exemplary term “below” can encompass both an orientation of above and below. The device can also be oriented in the other direction, and the spatially relative terms used herein are intended to encompass such additional orientations. It is noted that the terms “first”, “second”, and so on can be used to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish the first element from another element.

[0048] It is noted that when an element is referred to as being “connected” to another element, it can be directly connected to the other element, or connected to the other element through an intervening element. In addition, “connected” in the following embodiments should be understood as “electrically connected”, “communicatively connected”, and the like if there is a transmission of electrical signals or data between the connected objects.

[0049] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0050] refer to Figure 1 , Figure 1 This is a schematic diagram of a control system for a light source module according to one embodiment. Figure 1 As shown, the control system of a light source module in one embodiment includes a light source module 110, a temperature detection module 120, and a controller 130. Wherein:

[0051] The light source module 110 includes a light-emitting component for providing a light source; the temperature detection module 120 includes a first temperature sensor 121 and a second temperature sensor 122, the first temperature sensor 121 for detecting the ambient temperature inside the light source module 110 to obtain first temperature information, and the second temperature sensor 122 for detecting the operating temperature of the light-emitting component to obtain second temperature information; the controller 130 is connected to the first temperature sensor 121 and the second temperature sensor 122 respectively, for receiving the first temperature information and the second temperature information, and for adjusting the operating temperature of the light source module 110 based on the feedback of the first temperature information and the second temperature information, so that the operating temperature of the light source module 110 is maintained within a preset temperature range.

[0052] The light-emitting component provides a light source, typically an RGB (red, green, blue) three-color light source. After processing by the light engine, the light source provided by the light-emitting component can display a specific image. To provide feedback and adjust the operating temperature of the light source module 110, its operating temperature needs to be detected. This embodiment uses a first temperature sensor 121 to detect the ambient temperature inside the light source module 110, and a second temperature sensor 122 to detect the operating temperature of the light-emitting component. The operating temperature of the light source module 110 refers to its temperature during operation. The preset temperature range refers to the temperature when the projector is in a stable operating state and can be set according to different conditions. For example, the preset temperature range can be 40℃ or below 25℃. The first temperature information refers to the ambient temperature inside the light source module 110. The second temperature information refers to the operating temperature of the light-emitting component.

[0053] Specifically, the RGB (red, green, and blue) three-color light source can be provided by a laser tube, or can be provided by a laser tube and corresponding fluorescent powder.

[0054] In some embodiments, the light source module 110 further includes optical elements, a structure supporting the optical elements, and circuitry controlling the optical elements.

[0055] Specifically, the optical elements are used for beam shaping or controlling the propagation direction of the light beam, and the optical elements can include convex lenses, concave lenses, plane mirrors, etc. The number of optical elements can be one or more, and the arrangement of the optical elements can be selected according to actual needs, which is not limited.

[0056] Specifically, the structure supporting the optical elements can include convex lens supports, long strip mirror supports, adjustment structures of plane mirrors, etc. The structure supporting the optical elements can be arranged according to actual needs, as long as it can bear the optical elements or adjust the position of the optical elements, which is not limited.

[0057] Specifically, the circuitry controlling the optical elements is used to control the switching of the laser tube, monitor the working state of the light source module 110, monitor the working environment parameters of the light source module 110, etc. The functions and structures of the circuitry can be arranged according to actual needs, which is not limited. Specifically, the first temperature sensor 121 detects the environmental information of the light source module 110 to obtain first temperature information, and sends the first temperature information to the controller 130. The second temperature sensor 122 detects the environmental information of the light source module 110 to obtain second temperature information, and sends the second temperature information to the controller 130. The controller 130 determines whether the working temperature of the light source module 110 exceeds the preset temperature range according to the first temperature information and the second temperature information, and if it exceeds the preset temperature range, it feeds back to adjust the working temperature of the light source module 110 to maintain it within the preset temperature range.

[0058] In this embodiment, since the controller 130 can feed back to adjust the working temperature of the light source module 110 to maintain it within the preset temperature range according to the first temperature information and the second temperature information, the working temperature of the light source module 110 can be kept normal, avoiding the problem of unstable working state of the projector caused by the working temperature of the light source module 110 exceeding the preset temperature range, and realizing the stable working state of the projector in the working process.

[0059] In some embodiments, the feedback adjustment of the working temperature of the light source module 110 according to the first temperature information and the second temperature information can be to take the temperature information with normal fluctuation amplitude in the first temperature information and the second temperature information as a reference, so as to adjust the working temperature of the light source module 110.

[0060] In some embodiments, the feedback adjustment of the working temperature of the light source module 110 according to the first temperature information and the second temperature information can be based on a weighted average of the first temperature information and the second temperature information, so as to adjust the working temperature of the light source module 110. It can be understood that, since the first temperature sensor 121 detects the ambient temperature of the light source module 110, and the second temperature sensor 122 is arranged to detect the working temperature of the light emitting assembly, the feedback adjustment of the light source module 110 based on the temperature information detected by the first temperature sensor 121 and the second temperature sensor 122 avoids the problem that the temperature detection result is not accurate enough when the temperature of the light source module 110 is detected by one temperature sensor, and the temperature detection result of the light source module 110 is improved.

[0061] Specifically, since the first temperature sensor 121 detects the ambient temperature, and the air conduction heat needs a certain time, the value detected by the first temperature sensor 121 may not be able to truly reflect the working temperature of the light source module 110. For example, if the temperature of the light emitting assembly rises, the ambient temperature inside the light source module 110 does not rise much in a short time, but the temperature of the light emitting assembly has risen rapidly, at this time, the first temperature sensor 121 cannot truly reflect the working temperature of the light source module 110, and the second temperature sensor 122 can truly reflect the working temperature of the light source module 110. However, the second temperature information may not be able to accurately reflect the working temperature of the light source module 110 in all cases, for example, in the case that the light source module 110 works stably for a long time, the heat emitted by the light emitting assembly fluctuates, which makes the second temperature information exceed the preset temperature range, at this time, the ambient temperature detected by the first temperature sensor 121 is accurate and can truly reflect the working temperature of the light source module 110.

[0062] It should be noted that, generally, only the first temperature information detected by the first temperature sensor 121 can be used as the temperature reference, but the working temperature of the light source module 110 detected by the first temperature sensor 121 and the second temperature sensor 122 is more accurate.

[0063] In one embodiment, if the working temperature of the light source module 110 is maintained for a period of time, if the temperature difference detected by the first temperature sensor 121 and the second temperature sensor 122 is less than a temperature difference threshold, or if the first temperature information and the second temperature information are both within the preset temperature range, the temperature detection is based on the detection of the first temperature sensor 121.

[0064] In one embodiment, the light source module 110 comprises a housing, a base and a light combiner. The light combiner is arranged at the light emitting component, the housing and the base cooperate to form a receiving cavity for receiving the light emitting component and the light combiner, and the first temperature sensor 121 is arranged at the inner side wall of the housing, the side of the base close to the receiving cavity, the light emitting component and / or the light combiner.

[0065] Specifically, the first temperature sensor 121 can be arranged inside the housing of the light source module 110, so that the first temperature sensor 121 can detect the internal ambient temperature of the light source module 110.

[0066] In this embodiment, the first temperature sensor 121 can be arranged at any one of the inner side wall of the housing, the side of the base close to the receiving cavity, the light emitting component and the light combiner. It should be noted that if the first temperature sensor 121 is arranged at more than two places, the first temperature information detected by the first temperature sensor 121 at the more than two places is averaged to obtain the ambient temperature in the light source module 110.

[0067] It can be understood that by arranging the first temperature sensor 121 at more than two of the inner side wall of the housing, the side of the base close to the receiving cavity, the light emitting component and the light combiner, the ambient temperature in the light source module 110 can be more accurately measured.

[0068] Reference Figure 2 , Figure 2 Another structure schematic diagram of a control system is provided for one embodiment. In one embodiment, the control system further comprises a water cooling module 140. Wherein:

[0069] The water cooling module 140 comprises a water cooling machine and a water cooling pipe. The water cooling pipe is arranged at the light emitting component, the water cooling machine is connected with the water cooling pipe, and the water cooling machine is used to adjust the flow rate of the circulating cooling water in the water cooling pipe to adjust the working temperature of the light emitting component.

[0070] The water cooling pipe can be a circulating water cooling pipe, i.e. the water cooling pipe forms a closed loop. The water cooling pipe is arranged at the light emitting component, which can be arranged in contact with the light emitting component. The water cooling pipe stores circulating cooling water, and the water cooling machine can adjust the flow rate of the circulating cooling water in the water cooling pipe to adjust the working temperature of the light emitting component. It should be noted that the higher the flow rate of the circulating cooling water, the better the cooling effect.

[0071] The water cooling machine of this embodiment adjusts the flow rate of the circulating cooling water under the control of the controller 130 to adjust the working temperature of the light emitting component.

[0072] Specifically, the controller 130 can determine whether the working temperature of the light source module 110 is out of the preset temperature range according to the first temperature information and the second temperature information, and if the working temperature of the light source module 110 is out of the preset temperature range, the water cooling module 140 is controlled to adjust the working temperature of the light source module 110 to restore to the preset temperature range.

[0073] Optionally, the determination of the working temperature of the light source module 110 according to the first temperature information and the second temperature information can be to select the maximum value of the first temperature information and the second temperature information as the working temperature of the light source module 110, or to select the average value of the first temperature information and the second temperature information as the working temperature of the light source module 110, which is not limited here.

[0074] In an embodiment, the second temperature sensor 122 is arranged at the water cooling module 140 to detect the temperature of the circulating cooling water to obtain the working temperature of the light emitting assembly. Optionally, it can be arranged at the water cooling pipe or at the water cooling machine, which is not limited here.

[0075] Generally, after the light source module 110 is in the working state for a certain time, the temperature of the circulating cooling water is consistent with the working temperature of the light emitting assembly, and the temperature of the circulating cooling water can be taken as the working temperature of the light emitting assembly. In addition, the second temperature sensor 122 can also be arranged directly on the light emitting assembly, which is not limited here.

[0076] It can be understood that by arranging the second temperature sensor 122 at the water cooling pipe to detect the temperature of the circulating cooling water, the convenience of arranging the second temperature sensor 122 is greatly improved.

[0077] Reference Figure 3 , Figure 3 Another structure schematic diagram of a control system provided for an embodiment. In an embodiment, the control system further comprises a current detection module 150, wherein:

[0078] The current detection module 150 is connected with the light emitting assembly and the controller 130 respectively, for detecting the driving current of the light emitting assembly and sending the driving current to the controller 130; the controller 130 is further used for adjusting the RGB ratio output by the light source module 110 according to the driving current feedback, so as to maintain the RGB ratio output by the light source module 110 at a preset ratio.

[0079] In the embodiment, the driving current of the light emitting assembly is detected by the current detection module 150, and the driving current is sent to the controller 130. The controller 130 determines whether the RGB ratio output by the light source module 110 is maintained at the preset ratio according to the driving current. If the RGB ratio output by the light source module 110 is not maintained at the preset ratio, the RGB ratio output by the light source module 110 is adjusted to maintain at the preset ratio, which can ensure the white balance effect of the light source module 110, thereby further stabilizing the working state of the light source module 110.

[0080] It should be noted that in the embodiment, the RGB ratio anomaly is considered to be caused by the driving current anomaly. The driving currents of the red laser tube, the green laser tube and the blue laser tube are detected by the current detection module 150. According to the driving currents of the laser tubes of different colors, the abnormal laser tube can be determined. The laser tube with abnormal driving current is the abnormal laser tube, so that the driving current of the abnormal laser tube is adjusted to maintain the RGB ratio at the preset ratio.

[0081] In one embodiment, the control system further comprises a light intensity detection module 160, which is arranged at the light output of the light emitting assembly, so as to detect the RGB ratio output by the light source module 110.

[0082] Among them, the RGB ratio refers to the ratio between the red light intensity, the green light intensity and the blue light intensity. When the ratio between the red light intensity, the green light intensity and the blue light intensity meets the preset ratio, the light source module 110 can meet the white balance effect.

[0083] In the embodiment, it is considered that the RGB ratio anomaly is not only caused by the driving current, but also caused by the laser tube itself. During use, the laser tubes of different colors may have different degrees of aging. The RGB ratio output by the light source module 110 is detected by the light intensity detection module 160. If the driving current is normal but the RGB ratio is abnormal, it is caused by different aging degrees of the laser tubes. At this time, the standby laser tube of the abnormal laser tube can be controlled to work, or the light intensity of the laser tube can be adjusted by adjusting the driving current, so that the RGB ratio output by the light source module 110 meets the preset ratio.

[0084] In the embodiment, the RGB ratio of the light source module 110 is detected by the light intensity detection module 160 and the current detection module 150 to determine whether the RGB ratio meets the preset ratio, which can improve the accuracy of white balance adjustment.

[0085] In some cases, if the working temperature of the light source module 110 exceeds the preset temperature range, it can be caused by the temperature of the working environment where the light source module 110 is located, or it can be caused by the abnormal driving current of the light emitting assembly. If the working temperature of the light source module 110 exceeds the preset temperature range due to the abnormal driving current, if the cooling continues, the working temperature of the light source module 110 cannot be restored to the preset temperature range, and the light source module 110 can be damaged, and the light emitting assembly needs to be powered off at this time; if the working temperature of the light source module 110 exceeds the preset temperature range due to the working environment where the light source module 110 is located, if the power-off processing is performed at this time, the normal work of the light source module 110 will be affected, and the projection will be interrupted, and the working temperature of the light source module 110 can be adjusted to restore to the preset temperature range at this time.

[0086] In one embodiment, the controller 130 is further configured to determine whether the working temperature of the light source module 110 exceeds the preset temperature range according to the first temperature information and the second temperature information, and if the working temperature of the light source module 110 exceeds the preset temperature range, determine whether the driving current of the light source module 110 is abnormal, and if the driving current of the light source module 110 is normal, control the water cooling module 140 to adjust the working temperature of the light source module 110 to restore to the preset temperature range.

[0087] In this embodiment, by detecting whether the driving current of the light source module 110 is abnormal before the feedback adjusts the working temperature of the light source module 110 to restore to the preset temperature range, it is considered whether the working temperature of the light source module 110 exceeds the preset temperature range due to the working environment where the light source module 110 is located or due to the abnormal driving current of the light emitting assembly, and the damage of the light source module 110 caused by not considering the reason of the abnormal driving current is avoided, and the safety of the use of the light source module 110 is improved.

[0088] Optionally, if the second temperature information represents that the temperature of the light emitting assembly exceeds the preset temperature range, the first temperature information can also not be considered, and the light source module 110 can be directly powered off.

[0089] Reference Figure 4 , Figure 4 A flowchart of a control method of a light source module is provided for an embodiment. The control method of the embodiment can run on the controller of the above-mentioned embodiments, as shown in FIG. 4, the control method of the light source module includes steps 410 to 420. Figure 4

[0090] Step 410, respectively acquiring first temperature information and second temperature information.

[0091] ​The first temperature information is obtained by detecting the ambient temperature in the light source module by a first temperature sensor, and the second temperature information is obtained by detecting the working temperature of the light emitting component by a second temperature sensor. The first temperature sensor and the second temperature sensor can be arranged as described in any of the above embodiments, and thus will not be described herein.

[0092] In step 420, the first temperature information and the second temperature information are received, and the working temperature of the light source module is feedback adjusted according to the first temperature information and the second temperature information, so that the working temperature of the light source module is maintained within the preset temperature range.

[0093] In this step, the working temperature of the light source module is feedback adjusted according to the first temperature information and the second temperature information, so that the working temperature of the light source module is maintained within the preset temperature range. Alternatively, the maximum value of the first temperature information and the second temperature information can be used as the working temperature of the light source module, or the average value of the first temperature information and the second temperature information can be used as the working temperature of the light source module. If the working temperature of the light source module exceeds the preset temperature range, the working temperature of the light source module is adjusted to return to the preset temperature range.

[0094] In this embodiment, the working temperature of the light source module can be maintained within the preset temperature range by feedback adjusting the working temperature of the light source module according to the first temperature information and the second temperature information, so that the working temperature of the light source module can be maintained normal, and the problem of unstable working state of the projector caused by the working temperature of the light source module exceeding the preset temperature range can be avoided, and the stable working state of the projector during the working process can be realized.

[0095] In one embodiment, feedback adjusting the working temperature of the light source module according to the first temperature information and the second temperature information comprises:

[0096] According to the first temperature information and the second temperature information, it is determined whether the working temperature of the light source module exceeds the preset temperature range. If the working temperature of the light source module exceeds the preset temperature range, it is determined whether the driving current of the light source module is abnormal. If the driving current of the light source module is normal, the working temperature of the light source module is feedback adjusted to return to the preset temperature range.

[0097] In some cases, if the operating temperature of the light source module exceeds the preset temperature range, it can be caused by the temperature of the working environment of the light source module itself being too high, but it can also be caused by the abnormal driving current of the light emitting assembly. The present embodiment considers whether the operating temperature of the light source module exceeds the preset temperature range due to the working environment of the light source module or due to the abnormal driving current of the light emitting assembly by detecting whether the driving current of the light source module is abnormal before the feedback adjusts the operating temperature of the light source module to recover to the preset temperature range, avoiding damage to the light source module without considering the reason for the abnormal driving current, and improving the safety of the light source module.

[0098] In one embodiment, in addition to adjusting the operating temperature of the light source module, the RGB ratio output by the light source module can also be adjusted.

[0099] In one embodiment, adjusting the RGB ratio output by the light source module can include:

[0100] The driving current of the light emitting assembly of the light source module is detected by the current detection module, and the controller receives the driving current sent by the current detection module, so as to feedback adjust the RGB ratio output by the light source module according to the driving current, so that the RGB ratio output by the light source module is maintained at the preset ratio.

[0101] In the present embodiment, the driving currents of the red laser tube, the green laser tube and the blue laser tube can be detected by the current detection module respectively, and the abnormal laser tube can be determined according to the driving currents of the laser tubes of each color. The laser tube with abnormal driving current is the abnormal laser tube, so as to adjust the driving current of the abnormal laser tube, so that the RGB ratio is maintained at the preset ratio.

[0102] In one embodiment, adjusting the RGB ratio output by the light source module can also include:

[0103] The RGB ratio output by the light source module is detected by the light intensity detection module. If the driving current is normal, but the RGB ratio is abnormal, it means that it is caused by different aging degrees of the laser tubes. At this time, the standby laser tube of the same color as the abnormal laser tube can be controlled to work, or the light intensity of the laser tube can be adjusted by adjusting the driving current, so that the RGB ratio output by the light source module meets the preset ratio.

[0104] In the present embodiment, it is considered that the abnormal RGB ratio can not only be caused by the driving current, but also can be caused by the laser tube itself. During use, the laser tubes of each color can have different degrees of aging. By detecting whether the RGB ratio of the light source module meets the preset ratio through the light intensity detection module and the current detection module, the accuracy of white balance adjustment can be improved.

[0105] In one embodiment, when correcting the abnormal RGB ratio caused by different aging degrees of the laser tubes, the adjustment of the driving current of the laser tubes can be the adjustment of all laser tubes of the same color as the abnormal laser tube. In this way, after the total correction amount of the laser beam of a certain color is distributed to individual laser tubes, the adjustment required by individual laser tubes is smaller, thereby reducing the adjustment range of the driving current, and further avoiding large adjustment of the entire system.

[0106] In one embodiment, the adjustment of the RGB ratio output by the light source module can further include:

[0107] determining whether the driving current of the light source module is abnormal according to the first temperature information and the second temperature information; and if the driving current is abnormal, feeding back to adjust the RGB ratio output by the light source module to maintain a preset ratio.

[0108] In this embodiment, whether the driving current of the light source module is abnormal is determined according to the first temperature information and the second temperature information, and a device for determining whether the driving current is abnormal is not required, thereby simplifying the composition of the control system.

[0109] In one embodiment, the step of determining whether the driving current of the light source module is abnormal includes:

[0110] determining a first temperature change rate of the ambient temperature according to the first temperature information, and determining a second temperature change rate of the operating temperature of the light emitting component according to the second temperature information; if the first temperature change rate exceeds a first change rate threshold, and / or the second temperature change rate exceeds a second change rate threshold, it is determined that the driving current of the light source module is abnormal.

[0111] In this embodiment, the first temperature change rate refers to the change rate of the ambient temperature, and the second temperature change rate refers to the change rate of the light emitting component. If at least one of the following conditions occurs: the first temperature change rate exceeds the first change rate threshold, and the second temperature change rate exceeds the second change rate threshold, it is determined that the driving current is abnormal. If it is determined that the driving current of the light source module is abnormal, and the operating temperature of the light source module exceeds a preset temperature range, the light source module can be controlled to be powered off.

[0112] It should be noted that the first change rate threshold and the second change rate threshold can be set to the same rate threshold, which is not limited herein.

[0113] In the above embodiments, only whether the driving current is abnormal can be determined, and the specific laser tube corresponding to the abnormal driving current cannot be accurately located. The following embodiments describe how to determine the specific laser tube corresponding to the abnormal driving current.

[0114] In one embodiment, the light source module comprises first color laser tubes, second color laser tubes and third color laser tubes, the number of the first color laser tubes is the largest, the number of the third color laser tubes is the smallest, the difference between the number of the second color laser tubes and the third color laser tubes is less than a difference threshold, the driving current of each color laser tube is the same when the light source module is working normally, and the method further comprises:

[0115] If the first temperature change rate and the second temperature change rate are both in the first range, it is determined that the driving current of the first laser tube is abnormal, and / or;

[0116] If the first temperature change rate is in the second range and the second temperature change rate is in the third range, it is determined that the driving current of the second laser tube or the third laser tube is abnormal, and / or;

[0117] If the first temperature change rate is in the second range and the second temperature change rate is in the fourth range, it is determined that the driving current of the third laser tube is abnormal, and / or;

[0118] If the second temperature change rate is in the fifth range, it is determined that the driving current of the third laser tube is abnormal;

[0119] Wherein, the first range > the second range > the third range > the fourth range > the fifth range.

[0120] Wherein, the first color, the second color and the third color can be set according to actual conditions, which are not limited here. Generally, the number of red laser tubes is the largest, and the number of green laser tubes or blue laser tubes is the smallest. The following takes the first color laser tube as the red laser tube as an example.

[0121] If the temperature change rates detected by the first temperature sensor and the second temperature sensor are both in the first range, it is determined that the color deviation is caused by the red laser tube. If the first temperature change rate of the first temperature sensor is in the second range and the second temperature change rate of the second temperature sensor is in the third range, it is determined that the color deviation is caused by the green or blue laser tube. If the first temperature change rate of the first temperature sensor is in the second range and the second temperature change rate of the second temperature sensor is in the fourth range, it is determined that the color deviation is caused by the laser tube with the smallest number. If the second temperature change rate of the second temperature sensor is in the fifth range, it is determined that the color deviation is caused by the laser tube with the smallest number.

[0122] Specifically, the first range belongs to a range of fast temperature rate change. Because the number of red laser tubes is large, if the temperature rate change detected by the first temperature sensor and the second temperature sensor is in the first range, it indicates that the temperature fluctuation abnormality is probably caused by the abnormal operation of the red laser tubes. The second range and the third range are smaller than the first range. Because the number of green or blue laser tubes is small, if the temperature rate change is small, it indicates that the temperature fluctuation abnormality is probably caused by the abnormal operation of the green or blue laser tubes. However, because the difference in the number of green or blue laser tubes is not large, if the temperature rate change is in the third range, it can only be determined that the temperature fluctuation is caused by the abnormal operation of the green or blue laser tubes, but cannot be determined which color laser tube causes the temperature fluctuation. The fourth range is smaller than the third range. Therefore, if the temperature rate change is in the fourth range, it indicates that the color cast is caused by the laser tube with the smallest number. The fifth range is a range of small temperature rate change. In the fifth range, it can be determined that the color cast is caused by the laser tube with the smallest number.

[0123] It should be noted that the first range, the second range, the third range, the fourth range and the fifth range are related to the number of laser tubes and the driving current size in normal operation. The embodiment does not limit the values of the first range, the second range, the third range, the fourth range and the fifth range.

[0124] For example, the values of the ranges are as follows:

[0125] Range Rate of temperature change (degrees Celsius / minute) First range 2～3 Second range 1～2 Third range 1～2.5 Fourth range 0.5～1 Fifth range 0.2～0.5

[0126] It should be understood that, although Figure 4 the steps in the flowchart are shown in order according to the arrows, the steps are not necessarily executed in order according to the arrows. Unless otherwise specified herein, the execution of the steps is not strictly limited in order, and the steps can be executed in other orders. Moreover, Figure 4 at least part of the steps in the flowchart can include multiple steps or multiple stages. The steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of the steps or stages is not necessarily sequential, but can be executed in rotation or alternation with other steps or steps or stages in other steps.

[0127] In one embodiment, a projector device is also provided. The projector device includes the control system of the light source module of any of the above embodiments.

[0128] The control system of the light source module can refer to the description of any of the above embodiments, and the embodiment will not be described herein.

[0129] Referring to Figure 5 ,Figure 5 A structural schematic diagram of a projector device is provided for an embodiment. As shown, the projector device includes a projector and a water-cooled machine. The projector includes a light source module and a light engine. The light source provided by the light source module can present a specific image after being processed by the light engine. The water-cooled machine cools the light source module through a water-cooled pipe. Figure 5

[0130] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiments can be included. Any reference to memory, storage, database or other medium used in the embodiments provided by the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM can be in various forms such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0131] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0132] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present specification.

[0133] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.​

Claims

1. A control system for a light source module, characterized in that, include: A light source module includes a light-emitting component, the light-emitting component being used to provide a light source; The temperature detection module includes a first temperature sensor and a second temperature sensor. The first temperature sensor is used to detect the ambient temperature inside the light source module to obtain first temperature information, and the second temperature sensor is used to detect the operating temperature of the light-emitting component to obtain second temperature information. The controller is connected to the first temperature sensor and the second temperature sensor respectively, and is used to receive the first temperature information and the second temperature information, and adjust the operating temperature of the light source module according to the feedback of the first temperature information and the second temperature information, so as to maintain the operating temperature of the light source module within a preset temperature range. The controller is further configured to determine whether the driving current of the light source module is abnormal based on the first temperature information and the second temperature information, and when the driving current is abnormal, to adjust the RGB ratio output by the light source module to maintain it at a preset ratio so that the operating temperature of the light source module is maintained within a preset temperature range. The controller is further configured to determine a first rate of temperature change of the ambient temperature based on the first temperature information, and to determine a second rate of temperature change of the operating temperature of the light-emitting component based on the second temperature information. The light source module includes a first color laser tube, a second color laser tube, and a third color laser tube. The first color laser tube is the most numerous, and the third color laser tube is the least numerous. The difference in the number of the second color laser tubes and the third color laser tubes is less than a difference threshold. During normal operation, the driving current of each color laser tube in the light source module is the same. The controller is further configured to: If both the first temperature change rate and the second temperature change rate are within the first range, then it is determined that the driving current of the first color laser tube is abnormal, and / or; If the first temperature change rate is within the second range and the second temperature change rate is within the third range, then it is determined that the driving current of the second color laser tube or the third color laser tube is abnormal, and / or; If the first temperature change rate is within the second range and the second temperature change rate is within the fourth range, then it is determined that the driving current of the third color laser tube is abnormal, and / or; If the second temperature change rate is within the fifth range, then the driving current of the third color laser tube is determined to be abnormal. Wherein, each value in the first range is greater than each value in the second range, each value in the second range is greater than each value in the third range, each value in the third range is greater than each value in the fourth range, and each value in the fourth range is greater than each value in the fifth range.

2. The control system for the light source module according to claim 1, characterized in that, The light source module further includes a housing, a base, and a light combiner. The light combiner is disposed at the light emission point of the light-emitting component. The housing and the base cooperate to form a receiving cavity, which is used to house the light-emitting component and the light combiner. The first temperature sensor is disposed on the inner side wall of the housing, the side of the base near the receiving cavity, the light emission point of the light-emitting component, and / or the light emission point of the light combiner.

3. The control system for the light source module according to claim 1, characterized in that, Also includes: The water-cooled module includes a water chiller and water-cooled pipes. The water-cooled pipes are disposed at the light-emitting component. The water chiller is connected to the water-cooled pipes. The water chiller is used to adjust the flow rate of the circulating cooling water in the water-cooled pipes to adjust the operating temperature of the light-emitting component. The second temperature sensor is located at the water-cooling module to detect the temperature of the circulating cooling water in order to obtain the operating temperature of the light-emitting component.

4. The control system for the light source module according to any one of claims 1-3, characterized in that, Also includes: A current detection module is connected to both the light-emitting component and the controller, and is used to detect the driving current of the light-emitting component and send the driving current to the controller. The controller is also used to adjust the RGB ratio of the light source module output according to the drive current feedback, so that the RGB ratio of the light source module output is maintained at a preset ratio.

5. A control method for a light source module, characterized in that, The light source module includes a light-emitting component, and the method includes: First temperature information and second temperature information are obtained respectively, wherein the first temperature information is obtained by the first temperature sensor detecting the ambient temperature inside the light source module, and the second temperature information is obtained by the second temperature sensor detecting the operating temperature of the light-emitting component; The system receives the first temperature information and the second temperature information, and adjusts the operating temperature of the light source module based on the feedback of the first temperature information and the second temperature information, so that the operating temperature of the light source module is maintained within a preset temperature range. The step of adjusting the operating temperature of the light source module based on the feedback of the first temperature information and the second temperature information includes: Determine whether the driving current of the light source module is abnormal based on the first temperature information and the second temperature information; If the driving current is abnormal, the RGB ratio of the light source module output will be adjusted to maintain the preset ratio. The method further includes: A first rate of temperature change of the ambient temperature is determined based on the first temperature information, and a second rate of temperature change of the operating temperature of the light-emitting component is determined based on the second temperature information. The light source module includes a first color laser tube, a second color laser tube, and a third color laser tube. The first color laser tube is the most numerous, and the third color laser tube is the least numerous. The difference in the number of the second color laser tubes and the third color laser tubes is less than a difference threshold. During normal operation, the driving current of each color laser tube in the light source module is the same. The method further includes: If both the first temperature change rate and the second temperature change rate are within the first range, then it is determined that the driving current of the first color laser tube is abnormal, and / or; If the first temperature change rate is within the second range and the second temperature change rate is within the third range, then it is determined that the driving current of the second color laser tube or the third color laser tube is abnormal, and / or; If the first temperature change rate is within the second range and the second temperature change rate is within the fourth range, then it is determined that the driving current of the third color laser tube is abnormal, and / or; If the second temperature change rate is within the fifth range, then the driving current of the third color laser tube is determined to be abnormal. Wherein, each value in the first range is greater than each value in the second range, each value in the second range is greater than each value in the third range, each value in the third range is greater than each value in the fourth range, and each value in the fourth range is greater than each value in the fifth range.

6. The control method for the light source module according to claim 5, characterized in that, The step of adjusting the operating temperature of the light source module based on the feedback of the first temperature information and the second temperature information includes: Based on the first temperature information and the second temperature information, determine whether the operating temperature of the light source module exceeds the preset temperature range; If the operating temperature of the light source module exceeds the preset temperature range, then determine whether the driving current of the light source module is abnormal. If the drive current of the light source module is normal, the operating temperature of the light source module will be adjusted back to the preset temperature range.

7. The control method for the light source module according to claim 6, characterized in that, The step of determining whether the drive current of the light source module is abnormal also includes: If the first temperature change rate exceeds a first change rate threshold, and / or the second temperature change rate exceeds a second change rate threshold, then the driving current of the light source module is determined to be abnormal.

8. A projector device, characterized in that, The control system includes the light source module as described in any one of claims 1-4.

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