CN108073020B - Light source system, projector and temperature control method - Google Patents

Light source system, projector and temperature control method Download PDF

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Publication number
CN108073020B
CN108073020B CN201611006301.0A CN201611006301A CN108073020B CN 108073020 B CN108073020 B CN 108073020B CN 201611006301 A CN201611006301 A CN 201611006301A CN 108073020 B CN108073020 B CN 108073020B
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processor
temperature
light source
projector
fan
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CN108073020A (en
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吴正阳
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Priority to CN201611006301.0A priority Critical patent/CN108073020B/en
Priority to PCT/CN2017/088628 priority patent/WO2018090612A1/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The invention provides a light source system which comprises a fan, a light source, an air inlet channel, a filter screen clamped in the air inlet channel, an environment temperature sensor, a working temperature sensor and a processor, wherein the environment temperature sensor is used for detecting the environment temperature outside the light source system, the working temperature sensor is used for detecting the working temperature inside the light source system, the processor receives the environment temperature and the working temperature, judges and compares the environment temperature and the working temperature, and adjusts the rotating speed of the fan and/or the output power of the light source according to the judgment and comparison result. The invention also provides a projector and a temperature control method thereof. Compared with the prior art, the light source system, the projector and the temperature control method thereof can accurately adjust the air inlet amount of the projector, prolong the service life of the filter screen and improve the working performance of the projector.

Description

Light source system, projector and temperature control method
Technical Field
The invention belongs to the technical field of light sources, and particularly relates to a light source system, a projector and a temperature control method.
Background
At present, the projection technology is generally applied to daily life of people. The projection system can be used anywhere in meeting, teaching or entertainment places.
In the related art, the small and medium-sized projectors for families and education usually adopt a fan air cooling heat dissipation mode to guide airflow to pass through an air passage in the projectors and take away a large amount of heat generated by a light source and an LCD screen during working, so that the projectors are protected from normal operation. In order to ensure that dust is not brought into the air when the air is introduced to influence the imaging quality, an air filter screen is required to be arranged at the air inlet.
The service life of the air filter screen is closely related to the service environment. After long-time use, dust and tiny particulate matters in the air are attached to an air filter screen, so that the heat dissipation capacity of the machine is reduced, even an air inlet is blocked, and the machine needs to be replaced at the moment. In a dust-free air environment, the filter screen can be used for more than 2000 hours, and in a severe environment, the service time of the filter screen is less than 100 hours.
The working temperature control of the projector is an important condition for ensuring the service life and normal work of the projector, and in the related art, the fan can only radiate heat at the same rotating speed to control the working temperature of the projector, and under the condition of higher environmental cleanliness, the service life of a filter screen of the projector is far longer than that under the condition of lower cleanliness.
However, since the projector can usually only set the filter life and the replacement time conservatively, a large waste is caused.
Therefore, there is a need to provide a new light source system, a new projector and a new temperature control method to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the light source system, the projector and the temperature control method, which can accurately adjust the air inlet quantity of the projector, prolong the service life of the filter screen and improve the working performance.
The invention provides a light source system which comprises a fan, a light source, an air inlet channel and a filter screen clamped in the air inlet channel. The light source system further comprises an environment temperature sensor, a working temperature sensor and a processor, wherein the environment temperature sensor is used for detecting the environment temperature outside the light source system, the working temperature sensor is used for detecting the working temperature inside the light source system, the processor receives the environment temperature and the working temperature, judges and compares the environment temperature and the working temperature, and adjusts the rotating speed of the fan and/or the output power of the light source according to the judgment and comparison result.
The invention also provides a projector which comprises a machine body and the light source system provided by the invention, wherein the light source system is arranged in the machine body, the environment temperature sensor is arranged outside the air inlet channel, the working temperature sensor is arranged in the machine body, the processor is arranged in the machine body, and the environment temperature sensor and the working temperature sensor are respectively connected with the processor.
Preferably, the portable temperature sensor further comprises a display screen arranged on the surface of the machine body, and the display screen is used for displaying working parameters of at least one of the environment temperature sensor, the working temperature sensor, the fan, the light source and the processor.
Preferably, the operating parameter includes at least one of the ambient temperature, the operating temperature, the rotational speed, the output power, and processing information of the processor.
Preferably, the processing information comprises warning information, and the warning information comprises that the working temperature is higher than the preset temperature and the filter screen is blocked.
A temperature control method of a projector, comprising the steps of:
providing a projector, wherein the projector comprises a working temperature sensor, an environment temperature sensor, a processor, a fan, a light source and a filter screen which are arranged in a machine body;
a temperature detector for detecting the working temperature T0 and the ambient temperature Th0 of the projector through the working temperature sensor and the ambient temperature sensor, respectively, and transmitting the working temperature T0 and the ambient temperature Th0 detected in real time to the processor;
temperature judgment, namely presetting a working warning temperature T1, a working protection temperature T2 and an environmental warning temperature Th1 in the processor, and judging and comparing the working temperature and the environmental temperature according to a preset rule by the processor to obtain a comparison result;
and executing action, wherein the processor adjusts the rotating speed of the fan and the output power of the light source according to the comparison result and preset rules.
Preferably, the temperature determining and the action executing steps specifically include:
when T0 is less than or equal to T1, the processor controls the rotating speed of the fan to be reduced to be lower than the current rotating speed of the fan;
when T0> T1, the processor determines, in conjunction with the ambient temperature Th 0:
if Th0 is more than or equal to Th1, the processor controls the output power of the light source to be reduced to be lower than the current output power of the light source until T0 is less than or equal to T1;
if Th0< Th1, the processor controls the rotating speed of the fan to be increased to be larger than the current rotating speed of the fan until T0 is less than or equal to T1.
Preferably, the projector further includes a display screen disposed on the surface of the body, and the display screen is used to display working parameters of at least one of the ambient temperature sensor, the working temperature sensor, the fan, the light source, and the processor; the operating parameter includes at least one of the ambient temperature, the operating temperature, the rotational speed, the output power, and processing information of the processor.
Preferably, when T0> T1, the step of the processor determining in combination with the ambient temperature Th0 further comprises:
if the Th0 is not less than the Th1, the processor sends out warning information of overhigh environmental temperature and displays the warning information through the display screen;
if Th0< Th1, the processor sends out warning information for cleaning the filter screen and displays the warning information through the display screen.
Preferably, when T0> T1 and Th0< Th1, if the processor controls the rotation speed of the fan to increase to be greater than the current rotation speed, the operating temperature T0 still continues to increase and makes T0> T2, at this time, the processor saves the operating parameters of the current state and displays the operating parameters through the display screen, and controls the projector to be forcibly turned off.
Compared with the prior art, the light source system, the projector and the temperature control method thereof utilize the environment temperature sensor and the working temperature sensor in the projector to detect the temperature, judge the temperature through the processor and control the rotating speed of the fan and the output power of the light source by the judging structure according to the preset rule, thereby achieving the purposes of accurately adjusting the air inlet quantity, effectively controlling the service time of the filter screen and prolonging the service life of the filter screen; meanwhile, the blocking degree of the filter screen can be judged to remind a user of cleaning, so that the working performance of equipment is guaranteed.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic view of a projector according to the present invention, which includes a light source system;
fig. 2 is a flow chart of a temperature control method of a projector according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The embodiments/examples described herein are specific embodiments of the present invention, are intended to be illustrative of the concepts of the present invention, are intended to be illustrative and exemplary, and should not be construed as limiting the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention.
Referring to fig. 1, the present invention provides a projector 100, which includes a body 1, a fan 2 and a light source 3 disposed in the body 1, an air intake channel 4 disposed through the body 1, a filter screen 5 clamped in the air intake channel 4, an ambient temperature sensor 6 disposed outside the air intake channel 4, a working temperature sensor 7 disposed in the body 1, a processor 8 disposed in the body 1, and a display screen 9 disposed on a surface of the body 1. The environment temperature sensor 6 and the working temperature sensor 7 are respectively connected with the processor 8. It should be noted that, the connection between the environment temperature sensor 6 and the operating temperature sensor 7 and the processor 8 may be a physical electrical connection or a wireless communication connection.
The fan 2, the light source 3, the air inlet channel 4, the filter screen 5, the ambient temperature sensor 6, the working temperature sensor 7 and the processor 8 form a light source system (not numbered) of the invention, the ambient temperature sensor is used for detecting the ambient temperature outside the light source system, the working temperature sensor is used for detecting the working temperature inside the light source system, the processor receives the ambient temperature and the working temperature, judges and compares the ambient temperature and the working temperature, and adjusts the rotating speed of the fan and/or the output power of the light source according to the judgment and comparison result.
The fan 2 is used for air cooling heat dissipation of the projector 100, and protects the projector 100 to normally work.
The light source 3 is used for projection imaging, which is a main heat generating component.
The air inlet channel 4 is used for providing an airflow circulation channel for the fan 2.
The filter screen 5 is clamped in the air inlet channel 4 and used for ensuring that dust is not brought into the air when air is introduced to influence the imaging quality of the light source 3.
The ambient temperature sensor 6 is configured to detect an ambient temperature outside the machine body 1.
The working temperature sensor 7 is used for detecting the working temperature inside the machine body 1.
The environment alert temperature and the work alert temperature etc. are predetermine in the treater 8, treater 8 receives the environment temperature with operating temperature to carry out the comparison and judgement with predetermined environment alert temperature and work alert temperature, adjust according to the result of comparison and judgement the rotational speed of fan 2 fast with the output power size of light source 3, in order to adjust projecting apparatus 100 heat dissipation is balanced, makes projecting apparatus 100 handles normal operating condition.
The display screen 9 is electrically connected to the ambient temperature sensor 6, the operating temperature sensor 7, the fan 2, the light source 3, and the processor 8, respectively, and is configured to display operating parameters of the projector 100. Specifically, the operating parameters include the ambient temperature, the operating temperature, the rotational speed, the output power, and the processing information of the processor 8.
Of course, the content displayed by the display screen 9 is not limited to the above, and more information can be displayed, as is feasible, and the principle is the same.
Preferably, the processing information includes, but is not limited to: and warning information for reminding the user that the working temperature is too high and/or reminding the user to clean the filter screen 5. Such as "the operating temperature is higher than the preset temperature", "the screen is blocked", etc.
According to the projector 100, the environment temperature sensor 6 and the working temperature sensor 7 are used for detecting the environment temperature and the working temperature outside and inside the projector 100 together, the processor 8 is used for carrying out combined judgment according to the environment temperature and the working temperature according to preset rules and controlling the temperature state of the projector 100 so as to ensure the normal work of the projector 100, and meanwhile, the fan 2 of the projector 100 can carry out rotation speed adjustment according to the environment state, so that the service life of the filter screen 5 is prolonged, and the use cost is saved.
Referring to fig. 2, the present invention further provides a temperature control method for a light source system or a projector, which is described based on the projector 100 provided by the present invention, and the method includes the following steps:
step S1, providing a projector 100, where the projector 100 includes a working temperature sensor 7, an ambient temperature sensor 6, a processor 8, a fan 2, a light source 3, and a filter screen 5, which are disposed in the machine body 1.
Step S2, detecting the operating temperature T0 and the ambient temperature Th0 of the projector 100 by the operating temperature sensor 7 and the ambient temperature sensor 6, respectively. And transmits the operating temperature T0 and the ambient temperature Th0 detected in real time to the processor 8.
Step S3, temperature judgment, namely presetting a working warning temperature T1, a working protection temperature T2 and an environmental warning temperature Th1 in the processor 8, and judging and comparing the working temperature and the environmental temperature through the processor 8 according to a preset rule to obtain a comparison result, wherein if the obtained comparison result is that T0 is not more than T1; t0 is more than T1, and Th0 is more than or equal to Th 1; t0> T1 and Th0< Th1, etc.
In this step, the preset rule is specifically the real-time judgment of the processor 8. Of course, it is also possible to set the method as intermittent judgment, such as judgment once in ten minutes, etc., which is all feasible.
And step S4, executing actions, wherein the processor 8 adjusts the speed of the rotating speed of the fan 2 and the output power of the light source 3 according to the comparison result and preset rules, so that T0 is not more than T1, and the projector 100 is controlled within the range of processing normal working temperature, and the working performance is ensured.
In this embodiment, the display screen 9 is electrically connected to the ambient temperature sensor 6, the operating temperature sensor 7, the fan 2, the light source 3, and the processor 8, respectively, and is configured to display operating parameters of the projector 100. The working parameters comprise the environment temperature, the working temperature, the rotating speed, the output power and processing information of the processor. Such operating parameters include, but are not limited to, those mentioned above, as is feasible.
Specifically, the temperature determining and the action executing steps include the following states:
in the state 1, when the working temperature T0 is not greater than the working warning temperature T1, the processor 100 controls the rotation speed of the fan to be lower than the current rotation speed. Thereby can make energy-conserving when projector 100 normally works, just the intake reduces and makes the dust intake reduces, increases the protection the life of projector 100's filter screen. In the case of state 1, the display screen 9 now displays normal operating state information.
In the state 2, when the operating temperature T0> the operating alert temperature T1, the processor 8 makes an analysis judgment in combination with the ambient temperature Th 0:
and in the state of 2.1, if the ambient temperature Th0 is not less than the ambient warning temperature Th1, the processor controls the output power of the light source to be reduced to be lower than the current output power of the light source until T0 is not more than T1. In the case of state 2.1, the processor 8 is shown to send a warning message that the ambient temperature is too high and to display it via the display screen 9, for example, as "operating temperature is higher than a preset temperature".
And in the state 2.2, if Th0 is less than Th1, the processor 8 controls the rotating speed of the fan 2 to be increased to be greater than the current rotating speed of the fan until T0 is less than or equal to T1. In the case of state 2.2, the processor 8 issues a warning message to clean the screen and displays it via the display screen 9, for example as "screen clogged".
In practice, the method also includes a state 3: when T0> T1 and Th0< Th1, if the processor 8 controls the rotation speed of the fan 2 to increase to be greater than the current rotation speed, the operating temperature T0 still continues to increase even to make the operating temperature T0> the operating protection temperature T2, at this time, the processor 8 saves the operating parameters of the current state and displays the operating parameters through the display screen 9, and at the same time, controls the projector 100 to be forcibly turned off. Such as indicated by "high temperature failure".
According to the temperature control method of the projector, the environment temperature and the working temperature outside and inside the projector 100 are respectively detected through the environment temperature sensor 6 and the working temperature sensor 7, the processor 8 is used for carrying out combined judgment according to the environment temperature and the working temperature and according to a preset rule and controlling the temperature state of the projector 100 so as to ensure that the projector 100 normally works, meanwhile, the fan 2 of the projector 100 can carry out rotation speed adjustment according to the environment state without protecting high-speed rotation for a long time, and therefore the dust filtering amount of the filter screen 5 in the same time is reduced, the service life of the filter screen 5 is prolonged, and the use cost is saved.
In a dust-free air environment, the filter screen 5 can be used for more than 2000 hours, and in a severe environment, the service time of the filter screen is less than 100 hours. Since the air cleanliness and the operating state of the filter screen 5 cannot be judged in advance, the service life of the filter screen 5 can be set conservatively only according to the dust collection amount of the rated rotation speed of the fan 2, which causes great waste. The projector and the temperature control method thereof accurately control the temperature, so that the fan 2 does not always need to work at a rated rotating speed, and the service life of the filter screen 5 is prolonged.
Compared with the prior art, the projector and the temperature control method thereof utilize the environment temperature sensor and the working temperature sensor in the projector to detect the temperature, judge the temperature through the processor and control the rotating speed of the fan and the output power of the light source by the judging structure according to the preset rule, thereby achieving the purposes of accurately adjusting the air inlet quantity, effectively controlling the service time of the filter screen and prolonging the service life of the filter screen; meanwhile, the blockage degree of the filter screen can be judged to remind a user of cleaning and guaranteeing the working performance of the projector.
It should be noted that the above-mentioned embodiments described with reference to the drawings are only intended to illustrate the present invention and not to limit the scope of the present invention, and it should be understood by those skilled in the art that modifications and equivalent substitutions can be made without departing from the spirit and scope of the present invention. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.

Claims (9)

1. A light source system comprises a fan, a light source, an air inlet channel and a filter screen clamped on the air inlet channel, and is characterized by further comprising an ambient temperature sensor, a working temperature sensor and a processor, wherein the ambient temperature sensor is used for detecting the ambient temperature Th0 outside the light source system, and the working temperature sensor is used for detecting the working temperature T0 inside the light source system; an operating warning temperature T1 and an environmental warning temperature Th1 are preset in the processor, the processor receives the environmental temperature Th0 and the operating temperature T0, judges and compares the temperatures, and adjusts the rotating speed of the fan and/or the output power of the light source according to the judgment and comparison result:
when T0 is less than or equal to T1, the processor controls the rotating speed of the fan to be reduced to be lower than the current rotating speed of the fan;
when T0> T1, the processor determines, in conjunction with the ambient temperature Th 0:
if Th0 is more than or equal to Th1, the processor controls the output power of the light source to be reduced to be lower than the current output power of the light source until T0 is less than or equal to T1;
if Th0< Th1, the processor controls the rotating speed of the fan to be increased to be larger than the current rotating speed of the fan until T0 is less than or equal to T1.
2. A projector comprises a machine body and is characterized in that the projector further comprises a light source system according to claim 1, the light source system is arranged in the machine body, an environment temperature sensor is arranged outside an air inlet channel, a working temperature sensor is arranged in the machine body, a processor is arranged in the machine body, and the environment temperature sensor and the working temperature sensor are respectively connected with the processor.
3. The projector as claimed in claim 2, further comprising a display screen disposed on the surface of the body, wherein the display screen is configured to display an operating parameter of at least one of the ambient temperature sensor, the operating temperature sensor, the fan, the light source, and the processor.
4. The projector as claimed in claim 3, wherein the operating parameter includes at least one of the ambient temperature Th0, the operating temperature T0, the rotation speed, the output power, and processing information of the processor.
5. The projector as claimed in claim 4, wherein the processing information includes warning information including that the working temperature T0 is higher than a preset temperature and that the filter screen is clogged.
6. A temperature control method of a projector, comprising the steps of:
providing a projector, wherein the projector comprises a working temperature sensor, an environment temperature sensor, a processor, a fan, a light source and a filter screen which are arranged in a machine body;
temperature detection, detecting an operating temperature T0 and an ambient temperature Th0 of the projector through the operating temperature sensor and the ambient temperature sensor, respectively, and transmitting the operating temperature T0 and the ambient temperature Th0 detected in real time to the processor;
temperature judgment, namely presetting a working warning temperature T1, a working protection temperature T2 and an environmental warning temperature Th1 in the processor, and judging and comparing the working temperature and the environmental temperature according to a preset rule by the processor to obtain a comparison result;
and executing action, wherein the processor adjusts the rotating speed of the fan and the output power of the light source according to the comparison result and a preset rule:
when T0 is less than or equal to T1, the processor controls the rotating speed of the fan to be reduced to be lower than the current rotating speed of the fan;
when T0> T1, the processor determines, in conjunction with the ambient temperature Th 0:
if Th0 is more than or equal to Th1, the processor controls the output power of the light source to be reduced to be lower than the current output power of the light source until T0 is less than or equal to T1;
if Th0< Th1, the processor controls the rotating speed of the fan to be increased to be larger than the current rotating speed of the fan until T0 is less than or equal to T1.
7. The method according to claim 6, wherein the projector further comprises a display screen disposed on a surface of the body, and operating parameters of at least one of the ambient temperature sensor, the operating temperature sensor, the fan, the light source, and the processor are respectively displayed on the display screen; the operating parameter includes at least one of the ambient temperature, the operating temperature, the rotational speed, the output power, and processing information of the processor.
8. The method according to claim 7, wherein the step of the processor determining in conjunction with the ambient temperature Th0 when T0> T1 further comprises:
if the Th0 is not less than the Th1, the processor sends out warning information of overhigh environmental temperature and displays the warning information through the display screen;
if Th0< Th1, the processor sends out warning information for cleaning the filter screen and displays the warning information through the display screen.
9. The method as claimed in claim 8, wherein when T0> T1 and Th0< Th1, the processor controls the fan to increase its rotation speed to a value greater than its current rotation speed, and then the operating temperature T0 continues to increase and makes T0> T2, and then the processor saves the operating parameters of the current state and displays them on the display screen, and controls the projector to be forcibly turned off.
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PCT/CN2017/088628 WO2018090612A1 (en) 2016-11-15 2017-06-16 Light source system, projector, and temperature controlling method

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