CN105323511A - Smart television and temperature control and protection system and method thereof - Google Patents
Smart television and temperature control and protection system and method thereof Download PDFInfo
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- CN105323511A CN105323511A CN201410315041.XA CN201410315041A CN105323511A CN 105323511 A CN105323511 A CN 105323511A CN 201410315041 A CN201410315041 A CN 201410315041A CN 105323511 A CN105323511 A CN 105323511A
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Abstract
The invention discloses a smart television and a temperature control and protection system and method thereof. The temperature control and protection system comprises a temperature sensor and a main control chip. The main control chip is internally provided with a comparison unit, a kernel operation data control unit, a volume control unit and a backlight PWM control unit. When the operating temperature of the smart television is higher than a temperature threshold value, three modes of selectively closing the background service function of the smart television, reducing the volume output by the smart television and reducing backlight display brightness of the smart television can be selected simultaneously to carry out adjustment, and can also be selected in sequence to carry out adjustment successively, thereby reducing output power, reducing heating value and reducing overall temperature of the smart television. Therefore, use performance is effectively ensured, failure rate can be reduced, service life is prolonged, safety of the product is effectively protected, personal and property safety of users are protected, and a series of technical problems caused by over-high working temperature of the smart television due to small heat dissipation space thereof are solved.
Description
Technical field
The present invention relates to a kind of intelligent television, particularly relate to a kind of intelligent television with temperature Control protection system.
Background technology
Because such as thin-film transistor LCD device has gently, the advantage of thin and power saving, them are made to be widely used in daily life field, add the progress of science and technology, impart the intelligent functions of liquid crystal indicator further, common such as liquid crystal intelligent television, simultaneously, the heat-dissipating space of intelligent television inside is also more and more less, cause the efforts temperature of intelligent television too high, and the conditional request of intelligent television to temperature is strict, higher working temperature environment, light then cause screen to generate heat, uncomfortable temperature sense of touch is brought to user, heavy then cause intelligent television internal circuit impaired, useful life shortens.
Summary of the invention
In order to solve, the heat-dissipating space of intelligent television in prior art is little causes working temperature too high and a series of technical problem that causes, the invention provides a kind of new intelligent television and temperature Control protection system thereof and method.
To achieve these goals, the technical solution used in the present invention is: provide a kind of temperature Control protection system, be applied to intelligent display device, comprise and be arranged on can detecting the temperature sensor of described intelligent display device working temperature and storing the main control chip of a temperature threshold of described intelligent display device inside, it is characterized in that, kernel service data control unit is also provided with in described main control chip, volume control unit, backlight PWM control unit and the working temperature of described intelligent display device and described temperature threshold can be carried out contrasting and export the contrast unit of comparing result signal, described kernel service data control unit is used for the opening and closing of the background service function automatically controlling described intelligent display device according to described comparing result signal, described volume control unit is used for the size adjusting described intelligent display device output volume according to described comparing result signal, described backlight PWM control unit is used for the brightness adjusting the display of described intelligent display device according to described comparing result signal.
Described temperature sensor is multiple, and is connected with described main control chip by I2C bus.
Described volume control unit comprises loudspeaker power amplification output circuit, described loudspeaker power amplification output circuit comprises audio signal input end, audio signal output end and volume control input end, be connected with audio frequency integrated amplifier between described audio signal input end and audio signal output end, described volume control input end is connected with described audio frequency integrated amplifier by metal-oxide-semiconductor field effect transistor.
Described audio signal input end is used for the audio signal received to output to described audio frequency integrated amplifier, and described audio frequency integrated amplifier is used for outputting to described audio signal output end by after described Audio Signal Processing; Described volume control input end controls by the level height regulating described audio collection and successfully put reverse input end the volume of audio signal that described audio signal output end exports.
The D/A converter module that described backlight PWM control unit comprises processing module and is connected with described contrast unit, the comparing result signal that described D/A converter module is used for contrast unit exports is converted to analog signal by digital signal, and be transferred to described processing module, described processing module is used for when described working temperature is higher than described temperature threshold, and the duty ratio of adjustment PWM square wave reduces the brightness of described intelligent display device backlight display.
The present invention also provides a kind of and applies the method that above temperature Control protection system described arbitrarily carries out temperature Control protection, and be applied in intelligent display device, it is characterized in that, described method comprises:
S1, temperature sensor detect the working temperature of intelligent display device and send described working temperature to main control chip;
Described working temperature and the temperature threshold be stored in main control chip compare, and export comparing result signal after receiving the working temperature that temperature sensor sends by the contrast unit of S2, main control chip;
If S3 described comparing result signal be described working temperature higher than described temperature threshold, then kernel service data control unit receives described comparing result signal and closes the background service function of intelligent display device according to described comparing result signal-selectivity; Volume control unit receives described comparing result signal and reduces the size of intelligent display device output volume according to described comparing result signal; Backlight PWM control unit receives described comparing result signal and reduces the brightness of described intelligent display device display according to described comparing result signal; If described comparing result signal be described working temperature lower than described temperature threshold, then return step S1;
S4, return step S1.
In described step S3, described kernel service data control unit receives after working temperature is greater than the comparing result signal of temperature threshold, by sending control signal, the service routine of the part running background of intelligent display device or the service routine of whole running backgrounds is optionally stopped according to the priority preferably opening order or the setting of preferably closing of acquiescence, and then closed portion background service function or whole background service functions.
In described step S3, described volume control unit receives after working temperature is greater than the comparing result signal of temperature threshold, by sending control signal, improving the level that audio collection successfully puts reverse input end, thus reducing the volume of the audio signal that audio signal output end exports;
In described step S3, described backlight PWM control unit receives after working temperature is greater than the comparing result signal of temperature threshold, is reduced the brightness of described intelligent display device backlight display by the duty ratio of adjustment PWM square wave.
The present invention also provides the above temperature Control protection system described arbitrarily of another application to carry out the method for temperature Control protection, and be applied in intelligent display device, it is characterized in that, described method comprises:
S1, temperature sensor detect the working temperature of intelligent display device and send described working temperature to main control chip;
Described working temperature and the temperature threshold be stored in main control chip compare, and export comparing result signal after receiving the working temperature that temperature sensor sends by the contrast unit of S2, main control chip;
If S3 described comparing result signal be described working temperature higher than described temperature threshold, then kernel service data control unit receives described comparing result signal and closes the background service function of intelligent display device according to described comparing result signal-selectivity;
After the background service function closedown of S4, intelligent display device, again detect the working temperature of intelligent display device and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the background service function of main control chip detection intelligent display device closes completely, if so, the size that volume control unit reduces intelligent display device output volume is then controlled; If not, then step S3 is returned;
S5, again detect intelligent display device working temperature and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the volume of main control chip detection intelligent display device reaches the minimum preset in volume control unit, if so, the brightness that backlight PWM control unit reduces intelligent display device display is then controlled; If not, then step S4 is returned;
S6, again detect intelligent display device working temperature and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the brightness of main control chip detection intelligent display device display reaches the minimum preset in backlight PWM control unit, if, then close intelligent display device, if not, then step S5 is returned;
If the working temperature of the intelligent display device that S7 is step S3, detect in S4, S5 and S6 is less than described temperature threshold, then return step S1.
The present invention also provides a kind of intelligent TV set, it is characterized in that, described intelligent TV set comprises above temperature Control protection system described arbitrarily.
Adopt technical scheme provided by the invention, following Advantageous Effects can be obtained: arranging in intelligent display device inside can the temperature sensor of testing temperature, and the working temperature detected is compared with the temperature threshold being stored in main control chip inside, when working temperature is higher than this temperature threshold, the power output of intelligent display device disparate modules can be regulated by three kinds of modes, be respectively the service function of optionally closing intelligent display device backstage, reduce the volume that intelligent display device exports and the brightness reducing the display of intelligent display device backlight, three kinds of modes can regulate simultaneously, also can successively carry out successively, thus reduce caloric value to a certain extent, reduce the temperature of whole intelligent display device, both effectively ensure that the performance of equipment, equipment failure rate can be reduced again, increase the service life, effectively protect the fail safe of product, the protection user person and property safety, solve the heat-dissipating space of intelligent television in prior art little cause working temperature too high and cause a series of technical problem.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, embodiments of the present invention are described further, in accompanying drawing:
Fig. 1 is the module frame chart of the temperature Control protection system that the embodiment of the present invention one relates to;
Fig. 2 is the loudspeaker power amplification output circuit structure chart of the volume control unit that the present invention relates to;
Fig. 3 is the module frame chart of the backlight PWM control unit that the present invention relates to;
Fig. 4 is the module frame chart of the temperature Control protection system that the embodiment of the present invention two relates to.
Embodiment
In order to solve, the heat-dissipating space of intelligent television in prior art is little causes working temperature too high and a series of technical problem of initiation, the main technical schemes that the present invention adopts is: adopt a kind of temperature Control protection system, the working temperature of real-time measure and control intelligent television, namely the temperature sensor that can detect intelligent television working temperature is set in intelligent television inside, and the working temperature detected is compared with the temperature threshold being stored in main control chip inside, when working temperature is higher than this temperature threshold, the power output of intelligent television can be regulated by three kinds of modes, be respectively the service function of optionally closing intelligent television backstage, reduce the volume that intelligent television exports and the brightness reducing the display of intelligent television backlight, three kinds of modes can regulate simultaneously, also can successively carry out successively, thus reduce caloric value to a certain extent, reduce the temperature of whole intelligent television.
Below in conjunction with concrete accompanying drawing and preferred embodiment, technical scheme of the present invention is described in detail.The embodiment below exemplified only for instruction and explanation of the present invention, and does not form the restriction to technical solution of the present invention.
Embodiment one
Figure 1 shows that the module frame chart of the temperature Control protection system that the embodiment of the present invention one relates to.This system is applied in intelligent display device, such as intelligent television, home theater, projecting apparatus, medical treatment etc., and the present invention selects conventional common intelligent television in people's daily life to be that example is described.Temperature Control protection system 100 comprises the temperature sensor 1 that can detect the working temperature of intelligent television and the main control chip 2 storing a temperature threshold that are arranged on intelligent television inside, kernel service data control unit 21 is also provided with in main control chip 2, volume control unit 22, backlight PWM the control unit 23 and working temperature of intelligent television and temperature threshold can be carried out contrasting and export the contrast unit 24 of comparing result signal, contrast unit 24 is respectively with kernel service data control unit 21, volume control unit 22 is connected with backlight PWM control unit 23, wherein, PWM is pulse width modulation square wave, all PWM is called for short in the present invention.
In the present embodiment, temperature sensor 1 is preferably set to multiple, be separately positioned near the casing of intelligent television and each caloric value of casing internal is large, temperature is higher components and parts, such as, on the surface being arranged on the components and parts such as fin, metal-oxide-semiconductor field effect transistor, chip, transformer or support, the temperature of components and parts can be detected from multiple temperature monitoring point, be convenient to the temperature balancedly controlling intelligent television inside, in the present invention, the temperature of each components and parts detected be called the working temperature of intelligent television.The model of temperature sensor 1 is preferably TMP175, for two-wire system serial digital output temperature sensor, its temperature detection range is-40 DEG C ~+125 DEG C, and error amount is ± 2.0 DEG C, accurately can detect the temperature of each monitoring point in the range of temperature of components and parts in real time.TMP175 temperature sensor is that the little overall dimension of small size micro (MSOP)-8 encapsulates or little overall dimension (SO)-8 encapsulates, and size is less, is suitable for the temperature detection of intelligent television inside.In addition, TMP175 temperature sensor also has SMBus warning function, can send alarm signal when intelligent television working temperature is too high.
Main control chip 2 is connected with temperature sensor 1 by I2C bus, concrete, contrast unit 24 in main control chip 2 is connected with temperature sensor 1, and the temperature signal of the working temperature of the sign intelligent television that temperature sensor 1 sends can be received, contrast unit 24 carries out contrasting for the working temperature of the intelligent television by reception with the temperature threshold being stored in main control chip 2 inside and exports comparing result signal, and this temperature threshold is the limiting value set according to model and the configuration of intelligent television.The working temperature of intelligent television is detected in multiple monitoring point owing to adopting multiple temperature sensor in the present embodiment, therefore, the temperature signal characterizing the working temperature of intelligent television is a temperature curve summarizing each monitoring point detected temperatures, corresponding, the temperature threshold being stored in main control chip 2 inside is also a temperature curve.Comparing result signal can by low and high level signal indication or binary number representation, such as, when the working temperature of the intelligent television detected when monitoring point is higher than temperature threshold, the comparing result signal exported is high level, otherwise the comparing result signal of output is low level; Or when the working temperature of the intelligent television detected when monitoring point is higher than temperature threshold, the comparing result signal of output is binary number 11, otherwise the comparing result signal of output is 00.
Kernel service data control unit 21 is connected with contrast unit 24, and for the opening and closing of the background service function that automatically controls intelligent television according to comparing result signal.Concrete, when comparing result signal be intelligent television working temperature higher than setting temperature threshold time, kernel service data control unit 21 closes the service function such as network data download, upgrading, transfer of data on intelligent television backstage automatically, calculates service data amount to reduce kernel.
In the present embodiment, intelligent television master cpu adopts very fast six caryogamy to put, i.e. double-core cpu central processing unit and four core GPU picture processing districts, and two DDR3 chips, maximumly support 4GB capacity, a 32MBFlash, supports more than Android4.2 operating system.In addition, intelligent television is containing double-core CPU, its processing time shortens over half than monokaryon, therefore, intelligent television can support that the parallel work-flow of multiple different task is carried out simultaneously, but when executing the task too much, power consumption is also large, the heat produced is more, when temperature is too high, such as, when working temperature is higher than the temperature threshold set, kernel service data control unit 21 sends corresponding control signal, the optionally operation service program on stop section or whole backstage, namely close corresponding background service function, to reduce caloric value, reduce temperature.
Kernel service data control unit 21, when the operation service program on optionally stop section backstage, according to the priority level of the backstage respective services program set in intelligent television, first can stop the service routine that priority level is low; Or according to the background service program that each service routine open-interval sequencing acquiescence first stops the opening time longer.Certainly, other stopping order can also being set as required.
Volume control unit 22 is connected with contrast unit 24, and for the size according to comparing result signal adjustment intelligent television output volume.Concrete, volume control unit 22 comprises loudspeaker power amplification output circuit, be illustrated in figure 2 the circuit structure diagram of loudspeaker power amplification output circuit, this loudspeaker power amplification output circuit comprises audio signal input end, audio signal output end and volume control input end, be connected with audio frequency integrated amplifier between audio signal input end and audio signal output end, volume control input end is connected with audio frequency integrated amplifier by metal-oxide-semiconductor field effect transistor.
Concrete, audio signal input end is connected to 3 pins of audio frequency integrated amplifier U1, as the input of audio frequency integrated amplifier U1, volume control input end is connected to 2 pins of audio frequency integrated amplifier U1 by metal-oxide-semiconductor field effect transistor Q1, as the reverse input end of audio frequency integrated amplifier U1, audio signal output end is connected to 1 pin of audio frequency integrated amplifier U1, as output.Be provided with resistance R5 and tantalum electrochemical capacitor CA2, resistance R4 between audio signal input end and audio frequency integrated amplifier U1 to draw and ground connection from the connected node of resistance R5 and tantalum electrochemical capacitor CA2.Resistance R7 is provided with between volume control input end and metal-oxide-semiconductor field effect transistor Q1, the grid of metal-oxide-semiconductor field effect transistor Q1 is connected to 2 pins of audio frequency integrated amplifier U1, electric capacity C3 ground connection is drawn in the tie point parallel connection of the grid of metal-oxide-semiconductor field effect transistor Q1 and audio frequency integrated amplifier U1, and resistance R6 and the electric capacity C2 ground connection connected with resistance R6.Output 1 pin of audio frequency integrated amplifier is connected with Darlington circuit (in figure dotted box portion) by tantalum electrochemical capacitor CA1, the tie point of tantalum electrochemical capacitor CA1 and Darlington circuit draws resistance R9 and ground connection, is also connected with resistance R12 between resistance R6 and tantalum electrochemical capacitor CA1.The power input Vcc_12V that 4 pins are connected with earth terminal, 8 pins are connected with 12V voltage of audio frequency integrated amplifier U1, resistance R8 is connected with between power input Vcc_12V and audio output, resistance R2 and R3 is connected with between power input Vcc_12V and 3 pins of audio frequency integrated amplifier, the Nodes of resistance R2 and resistance R3 leads to the parallel circuits of resistance R1 and electric capacity C1, and ground connection.Wherein Darlington circuit comprises two triode Q2, Q3 and two resistance R10 and R11.
Audio signal input end is used for the audio signal received to output to audio frequency integrated amplifier U1, and audio frequency integrated amplifier U1 is used for outputting to audio signal output end by after Audio Signal Processing; The volume of volume control input end by regulating audio collection successfully to put the audio signal of the level height control audio signal output end output of reverse input end 2 pin.Concrete, metal-oxide-semiconductor field effect transistor Q1 is that gain controls components and parts, when not having volume control inputs signal to input, the grid of metal-oxide-semiconductor field effect transistor Q1 is refueled the direct voltage of nearly 12V by the power input Vcc_12V of audio frequency integrated amplifier U1, therefore, metal-oxide-semiconductor field effect transistor Q1 is cut off, and output 1 pin of audio frequency integrated amplifier U1 exports peak-to-peak value lower than 2 volts, now, whole loudspeaker power amplifier does not have automatic gain effect.When volume control unit 22 receive contrast unit 24 comparing result signal indication intelligent television working temperature higher than setting temperature threshold time, send frequency change control signal, this frequency change control signal is input to audio frequency integrated amplifier U1 by volume control input end, when the peak-to-peak value that output 1 pin is exported is higher than 2 volts, Darlington circuit conducting, reduce the reverse bias voltage of metal-oxide-semiconductor field effect transistor Q1, metal-oxide-semiconductor field effect transistor Q1 conducting, dynamic electric resistor reduces, so serve attenuation to input signal, namely reduce the volume that audio output exports.In addition, the gain variation range of Darlington circuit can up to 50dB, and thus this loudspeaker power amplification output circuit has the dynamic range of 50dB, effectively can improve the power output of complete machine.
Backlight PWM control unit 23 is connected with contrast unit 24, and for the brightness according to the display of comparing result signal adjustment intelligent television.Concrete, be illustrated in figure 3 the module frame chart of backlight PWM control unit 23, the D/A converter module 232 that backlight PWM control unit 23 comprises processing module 231 and is connected with contrast unit 24, D/A converter module 232 is converted to analog signal for the comparing result signal exported by contrast unit 24 by digital signal, and be transferred to processing module 231, processing module 231 is for when working temperature is higher than the temperature threshold set, and the duty ratio of adjustment PWM square wave reduces the brightness of intelligent television display.
Further illustrate the operation principle of backlight PWM control unit below, when intelligent television works, light-emitting diode is luminous or not luminous according to fixing frequency under the control of backlight PWM control unit, provide back light to the screen of intelligent television.The forming process of PWM square wave and principle are the common technique in this area, repeat no more here.After intelligent television work a period of time, its working temperature raises gradually, temperature sensor 1 detects this working temperature, be transferred to contrast unit 24, the temperature threshold of this working temperature and setting compares by contrast unit 24, and export comparing result signal, the comparing result signal received is converted to analog signal by digital signal by D/A converter module 232, and be transferred to processing module 231, if when working temperature is higher than temperature threshold, the PWM square wave that processing module 231 output duty cycle is less, thus reduce the fluorescent lifetime of light-emitting diode in a PWM square-wave cycle, namely the brightness of intelligent television display is reduced, or, by the duty ratio of adjustment PWM square wave, reduce backlight output current, thus make screen progressively dimmed, reduce the power that intelligent television exports, caloric value is reduced, to reach the object of cooling.
The method that above temperature Control protection system 100 carries out temperature Control protection is applied in lower mask body introduction, and the method for this temperature Control protection can be applied in various intelligent display device equally, and the present embodiment is described for intelligent television.The method comprises:
S1, temperature sensor 1 detect the working temperature of intelligent television and send this working temperature to main control chip; In the present embodiment, the components and parts place large in multiple caloric values of intelligent television arranges multiple monitoring point, and each monitoring point all arranges a temperature sensor 1.
This working temperature and the temperature threshold be stored in main control chip 2 compare, and export comparing result signal after receiving the working temperature that temperature sensor 1 sends by the contrast unit 24 of S2, main control chip; The working temperature of intelligent television is detected in multiple monitoring point owing to adopting multiple temperature sensor 1 in the present embodiment, therefore, the temperature signal characterizing the working temperature of intelligent television is a temperature curve summarizing each monitoring point detected temperatures, corresponding, the temperature threshold being stored in main control chip 2 inside is also a temperature curve.
If S3 comparing result signal is working temperature higher than the temperature threshold of setting, then kernel service data control unit 21 receives comparing result signal and closes the background service function of intelligent television according to comparing result signal-selectivity; Volume control unit 22 receives comparing result signal and reduces the size of intelligent television output volume according to comparing result signal; Backlight PWM control unit 23 receives comparing result signal and reduces the brightness of intelligent television display according to comparing result signal; If comparing result signal is the temperature threshold of working temperature lower than setting, then return step S1;
In this step, kernel service data control unit 21 receives after working temperature is greater than the comparing result signal of temperature threshold, by sending control signal, the service routine of the part running background of intelligent television or the service routine of whole running backgrounds is optionally stopped according to the priority preferably opening order or the setting of preferably closing of acquiescence, and then closed portion background service function or whole background service functions.
In this step, volume control unit 22 receives after working temperature is greater than the comparing result signal of temperature threshold, by sending control signal, improving the level that audio collection successfully puts reverse input end 2 pin, thus reducing the volume of the audio signal that audio signal output end 1 pin exports.
In this step, backlight PWM control unit 23 receives after working temperature is greater than the comparing result signal of temperature threshold, is reduced the brightness of intelligent television backlight display by the duty ratio of adjustment PWM square wave.
S4, return step S1.
In above step, if detect, the working temperature of intelligent television is far smaller than temperature threshold, and main control chip can control the service function on automatic opening section intelligent television backstage or suitably improve the volume that intelligent television exports or the brightness suitably improving the display of intelligent television backlight.
Whether the present embodiment detects the working temperature of intelligent television higher than the temperature threshold set by real-time circulation, and when this working temperature is higher than temperature threshold, adopt three kinds of modes to reduce the power output of intelligent television disparate modules simultaneously, reduce caloric value, thus reduce the working temperature of intelligent television.
Embodiment two
Be illustrated in figure 4 the module frame chart of the temperature Control protection system that the embodiment of the present invention two relates to, in the present embodiment, temperature Control protection system 100 comprises the temperature sensor 1 that can detect the working temperature of intelligent television and the main control chip 2 storing a temperature threshold that are arranged on intelligent television inside, kernel service data control unit 21 is also provided with in main control chip 2, the volume control unit 22 be connected with kernel service data control unit 21, the backlight PWM control unit 23 be connected with the volume control unit 22 and working temperature of intelligent television and temperature threshold can be carried out contrasting and export the contrast unit 24 of comparing result signal, contrast unit 24 is respectively with kernel service data control unit 21, volume control unit 22 is connected with backlight PWM control unit 23.The difference of the present embodiment and embodiment one is, kernel service data control unit 21, has signal annexation between volume control unit 22 and backlight PWM control unit 23, and other technologies feature is identical with embodiment one, repeats no more here.
Main control chip 2 is connected with temperature sensor 1 by I2C bus, concrete, contrast unit 24 in main control chip 2 is connected with temperature sensor 1, and the temperature signal of the working temperature of the sign intelligent television that temperature sensor 1 sends can be received, contrast unit 24 carries out contrasting for the working temperature of the intelligent television by reception with the temperature threshold being stored in main control chip 2 inside and exports comparing result signal.Kernel service data control unit 21 is for automatically controlling the opening and closing of the background service function of intelligent television according to comparing result signal; Volume control unit 22 is respectively with kernel service data control unit 21 with contrast unit 24 and be connected, both can receive the comparing result signal that contrast unit 24 transmits, and also can run by kernel the background service function that control data unit 21 detects intelligent television and whether close completely; Backlight PWM control unit 23, respectively with volume control unit 22 with contrast unit 24 and be connected, both can receive the comparing result signal of contrast unit 24 transmission, and whether the volume that also can detect intelligent television by volume control unit 22 reaches default minimum.
The temperature Control protection system of lower mask body introduction application the present embodiment carries out the method for temperature Control protection, and the method comprises:
S1, temperature sensor 1 detect the working temperature of intelligent television and send this working temperature to main control chip 2;
This working temperature and the temperature threshold be stored in main control chip 2 compare, and export comparing result signal after receiving the working temperature that temperature sensor 1 sends by the contrast unit 24 of S2, main control chip 2;
If S3 comparing result signal be working temperature higher than described temperature threshold, then kernel service data control unit 21 receives comparing result signal and closes the background service function of intelligent television according to comparing result signal-selectivity;
After the background service function closedown of S4, intelligent television, again detect the working temperature of intelligent television and itself and temperature threshold are contrasted, if working temperature is still higher than temperature threshold, whether the background service function that then main control chip 2 detects intelligent television closes completely, if so, the size that volume control unit 22 reduces intelligent television output volume is then controlled; If not, then step S3 is returned;
S5, again detect intelligent television working temperature and itself and temperature threshold are contrasted, if working temperature is still higher than temperature threshold, then whether the volume of main control chip detection intelligent television reaches the minimum preset in volume control unit 22, if so, the brightness that backlight PWM control unit 23 reduces intelligent television display is then controlled; If not, then step S4 is returned;
S6, again detect intelligent television working temperature and itself and temperature threshold are contrasted, if working temperature is still higher than temperature threshold, then whether the brightness of main control chip detection intelligent television display reaches the minimum preset in backlight PWM control unit 23, if, then close intelligent television, if not, then step S5 is returned;
If the working temperature of the intelligent television that S7 is step S3, detect in S4, S5 and S6 is less than temperature threshold, then return step S1.
In above step, if detect, the working temperature of intelligent television is far smaller than temperature threshold, and main control chip can control the service function on automatic opening section intelligent television backstage or suitably improve the volume that intelligent television exports or the brightness suitably improving the display of intelligent television backlight.
Whether the present embodiment detects the working temperature of intelligent television higher than the temperature threshold set by real-time circulation, and when this working temperature is higher than temperature threshold, three kinds of modes are adopted successively to reduce the power output of intelligent television disparate modules successively, while ensureing intelligent television normal function, reduce caloric value, thus reduce the working temperature of intelligent television.Certainly, in other variation, the sequencing that these the three kinds of modes of brightness optionally close the service function on intelligent television backstage, reducing the volume of intelligent television output and the display of reduction intelligent television backlight regulate can exchange.
To sum up, the present invention is arranged in intelligent television inside can the temperature sensor of testing temperature, and the working temperature detected is compared with the temperature threshold being stored in main control chip inside, when working temperature is higher than this temperature threshold, the power output of intelligent television disparate modules can be regulated by three kinds of modes, be respectively the service function of optionally closing intelligent television backstage, reduce the volume that intelligent television exports and the brightness reducing the display of intelligent television backlight, three kinds of modes can regulate simultaneously, also can successively carry out successively, thus reduce caloric value to a certain extent, reduce the temperature of whole intelligent television, both effectively ensure that the performance of intelligent television, the failure rate of intelligent television can be reduced again, increase the service life, effectively protect the fail safe of product, the protection user person and property safety, solve the heat-dissipating space of intelligent television in prior art little cause working temperature too high and cause a series of technical problem.
It will be understood by those skilled in the art that; these are only the embodiment of optimum of the present invention; can be improved according to the above description or be converted, do not made the improvement made under the prerequisite of creative work and conversion and all should belong to the protection range of claims of the present invention.
Claims (10)
1. a temperature Control protection system, be applied to intelligent display device, comprise and be arranged on can detecting the temperature sensor (1) of described intelligent display device working temperature and storing the main control chip (2) of a temperature threshold of described intelligent display device inside, it is characterized in that, kernel service data control unit (21) is also provided with in described main control chip (2), volume control unit (22), backlight PWM control unit (23) and the working temperature of described intelligent display device and described temperature threshold can be carried out contrasting and export the contrast unit (24) of comparing result signal, described kernel service data control unit (21) is for automatically controlling the opening and closing of the background service function of described intelligent display device according to described comparing result signal, described volume control unit (22) is for adjusting the size of described intelligent display device output volume according to described comparing result signal, described backlight PWM control unit (23) is for adjusting the brightness of described intelligent display device display according to described comparing result signal.
2. temperature Control protection system as claimed in claim 1, it is characterized in that, described temperature sensor (1), for multiple, is connected with described main control chip (2) respectively by I2C bus.
3. temperature Control protection system as claimed in claim 1, it is characterized in that, described volume control unit (22) comprises loudspeaker power amplification output circuit, described loudspeaker power amplification output circuit comprises audio signal input end, audio signal output end and volume control input end, audio frequency integrated amplifier is connected with between described audio signal input end and audio signal output end, described volume control input end is connected with described audio frequency integrated amplifier by metal-oxide-semiconductor field effect transistor, described audio signal input end is used for the audio signal received to output to described audio frequency integrated amplifier, described audio frequency integrated amplifier is used for outputting to described audio signal output end by after described Audio Signal Processing, described volume control input end controls by the level height regulating described audio collection and successfully put reverse input end the volume of audio signal that described audio signal output end exports.
4. temperature Control protection system as claimed in claim 1, it is characterized in that, the D/A converter module (232) that described backlight PWM control unit (23) comprises processing module (231) and is connected with described contrast unit (24), described D/A converter module (232) is converted to analog signal for the comparing result signal described contrast unit (24) exported by digital signal, and be transferred to described processing module (231), described processing module (231) is for when described working temperature is higher than described temperature threshold, the duty ratio of adjustment PWM square wave reduces the brightness of described intelligent display device backlight display.
5. application rights requires that the temperature Control protection system described in 1-4 any one carries out a method for temperature Control protection, and be applied in intelligent display device, it is characterized in that, described method comprises:
S1, temperature sensor (1) detect the working temperature of intelligent display device and send described working temperature to main control chip (2);
After the contrast unit (24) of S2, main control chip (2) receives the working temperature that temperature sensor (1) sends, described working temperature and the temperature threshold be stored in main control chip are compared, and exports comparing result signal;
If S3 described comparing result signal be described working temperature higher than described temperature threshold, then kernel service data control unit (21) receives described comparing result signal and closes the background service function of intelligent display device according to described comparing result signal-selectivity; Volume control unit (22) receives described comparing result signal and reduces the size of intelligent display device output volume according to described comparing result signal; Backlight PWM control unit (23) receives described comparing result signal and reduces the brightness of described intelligent display device display according to described comparing result signal; If described comparing result signal be described working temperature lower than described temperature threshold, then return step S1;
S4, return step S1.
6. the method for temperature Control protection as claimed in claim 5; it is characterized in that; in described step S3; described kernel service data control unit (21) receives after working temperature is greater than the comparing result signal of temperature threshold; by sending control signal; the service routine of the part running background of intelligent display device or the service routine of whole running backgrounds is optionally stopped according to the priority preferably opening order or the setting of preferably closing of acquiescence, and then closed portion background service function or whole background service functions.
7. the method for temperature Control protection as claimed in claim 5; it is characterized in that; in described step S3; described volume control unit (22) receives after working temperature is greater than the comparing result signal of temperature threshold; by sending control signal; improve the level that audio collection successfully puts reverse input end, thus reduce the volume of the audio signal that audio signal output end exports.
8. the method for temperature Control protection as claimed in claim 5; it is characterized in that; in described step S3; described backlight PWM control unit (23) receives after working temperature is greater than the comparing result signal of temperature threshold, is reduced the brightness of described intelligent display device backlight display by the duty ratio of adjustment PWM square wave.
9. application rights requires that the temperature Control protection system described in 1-5 any one carries out a method for temperature Control protection, and be applied in intelligent display device, it is characterized in that, described method comprises:
S1, temperature sensor (1) detect the working temperature of intelligent display device and send described working temperature to main control chip (2);
After the contrast unit (24) of S2, main control chip (2) receives the working temperature that temperature sensor (1) sends, described working temperature and the temperature threshold be stored in main control chip are compared, and exports comparing result signal;
If S3 described comparing result signal be described working temperature higher than described temperature threshold, then kernel service data control unit (21) receives described comparing result signal and closes the background service function of intelligent display device according to described comparing result signal-selectivity;
After the background service function closedown of S4, intelligent display device, again detect the working temperature of intelligent display device and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the background service function of main control chip (2) detection intelligent display device closes completely, if so, the size that volume control unit (22) reduces intelligent display device output volume is then controlled; If not, then step S3 is returned;
S5, again detect intelligent display device working temperature and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the volume of main control chip (2) detection intelligent display device reaches the minimum preset in volume control unit (22), if so, the brightness that backlight PWM control unit (23) reduces intelligent display device display is then controlled; If not, then step S4 is returned;
S6, again detect intelligent display device working temperature and itself and described temperature threshold are contrasted, if described working temperature is still higher than described temperature threshold, then whether the brightness of main control chip (2) detection intelligent display device display reaches the minimum preset in backlight PWM control unit (23), if, then close intelligent display device, if not, then step S5 is returned;
If the working temperature of the intelligent display device that S7 is step S3, detect in S4, S5 and S6 is less than described temperature threshold, then return step S1.
10. an intelligent television, is characterized in that, described intelligent television comprises the temperature Control protection system described in claim 1-4 any one.
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| CN201410315041.XA CN105323511A (en) | 2014-07-03 | 2014-07-03 | Smart television and temperature control and protection system and method thereof |
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| CN201410315041.XA CN105323511A (en) | 2014-07-03 | 2014-07-03 | Smart television and temperature control and protection system and method thereof |
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