CN104407646A - Automatic heating control circuit, display and heating method - Google Patents
Automatic heating control circuit, display and heating method Download PDFInfo
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- CN104407646A CN104407646A CN201410674262.6A CN201410674262A CN104407646A CN 104407646 A CN104407646 A CN 104407646A CN 201410674262 A CN201410674262 A CN 201410674262A CN 104407646 A CN104407646 A CN 104407646A
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Abstract
The invention discloses a heating control circuit, a display and a heating method. The automatic heating control circuit comprises temperature sensors, a comparator, a control unit and a heating circuit, wherein the temperature sensors are used for detecting temperature data; the comparator is configured to be connected with the temperature sensors to compare the temperature data with first default data to obtain a first opening signal or a first closing signal; the control unit is configured to be connected with the temperature sensors to process the temperature data to obtain a second opening signal or a second closing data; the heating circuit is configured to be connected with the comparator and the control unit to judge whether heating needs to be performed through a heater. The automatic heating control circuit solves the problem in the prior art that the display cannot work at a low temperature and achieves automatic heating systems of products.
Description
Technical field
The present invention relates to heating art, particularly, relate to a kind of Automatic-heating control circuit, display and heating means.
Background technology
Current airbome liquid crystal display module is in actual application, the corresponding environmental requirement of demand fulfillment, low temperature can reach-45 DEG C, when liquid crystal works in low temperature environment, the viscosity of liquid crystal increases, electrooptical effect weakens or disappears and cisco unity malfunction, now the overall brightness of liquid crystal display declines, color color is desalinated, contrast reduces rapidly, the response time that image loads extends, when temperature declines further (less than-30 DEG C), blackout, liquid crystal display becomes normal white state, due to this specific physical of liquid crystal molecule itself, start display at low temperatures, can not normally showing of information can be made, in cold or High aititude region, badly influence the acquisition of user to display information.
Current flat pannel display widespread adoption every field, no matter military products or civilian consumer electronics, such as outdoor liquid crystal display advertisement machine, need the product etc. carrying out Automatic-heating, all there is problem in this respect.
Summary of the invention
The object of this invention is to provide a kind of Automatic-heating control circuit, display and heating means, this Automatic-heating control circuit overcomes the problem that display of the prior art cannot work at low ambient temperatures, achieves the automatic heating system of product.
To achieve these goals, the invention provides a kind of Automatic-heating control circuit, this Automatic-heating control circuit comprises: temperature sensor, and described temperature sensor is used for detected temperatures data;
Comparer, is configured to be connected to described temperature sensor, obtains the first start signal or the first shutdown signal described temperature data and the first preset data to be compared;
Control module, is configured to be connected to described temperature sensor, obtains the second start signal or the second shutdown signal described temperature data to be carried out process;
Heater circuit, is configured to be connected to described comparer and control module, to judge whether to be heated by well heater.
Preferably, described heater circuit comprises: the first optocoupler, is configured to be connected to described comparer, to receive described first start signal or the first shutdown signal;
First stabilivolt, is configured to be connected to described first optocoupler, to open according to described first start signal or to close according to described first shutdown signal;
Second optocoupler, is configured to be connected to described control module, to receive described second start signal or the second shutdown signal;
Second stabilivolt, is configured to be connected to described second optocoupler, to open according to described second start signal or to close according to described second shutdown signal;
Heating power supply, be configured to be connected to described first stabilivolt, well heater, described second stabilivolt and ground successively, also be connected with the first resistance between described well heater and ground, when described first stabilivolt is opened and described second stabilivolt is closed, described well heater heats.
Preferably, described heater circuit also comprises: triode, and the base stage of described triode is connected to described comparer, and the collector of described triode is connected to described first optocoupler, the grounded emitter of described triode.
Preferably, this Automatic-heating control circuit also comprises: sample circuit, one end of described sample circuit is configured to be connected to described temperature sensor to receive temperature data, and the other end is configured to be connected to described comparer and described control module, to send described temperature data.
Preferably, this Automatic-heating control circuit also comprises: D/A converting circuit, described D/A converting circuit is connected between described sample circuit and described control module, the simulating signal of described temperature data to be converted to the digital signal stated control module and can accept.
Preferably, described control module is single-chip microcomputer.
The invention provides a kind of display, described display comprises: according to above-mentioned Automatic-heating control circuit.
The present invention also provides a kind of heating means, it is characterized in that, according to above-mentioned Automatic-heating control circuit, the method comprises:
S101, the temperature data of warmware to be added of sampling;
S102, is compared temperature data and preset data by comparer;
S103, when described temperature data is greater than described preset data, described comparer exports the first start signal; When described temperature data is less than or equal to described preset data, described comparer exports the first shutdown signal;
S104, is undertaken processing to obtain the second start signal or the second shutdown signal by control module by described temperature data;
S105, when described heater circuit receives the first start signal and the second shutdown signal, well heater heats.
Preferably, described second start signal is pulse width modulation wave signal.
Preferably, the heating power supply voltage of described heater circuit is 28V.Other features and advantages of the present invention are described in detail in embodiment part subsequently.
By in above-mentioned embodiment, under Automatic-heating control circuit of the present invention can make low temperature, heated by this heater circuit, the present invention is by the heating arrangement of two-way, namely temperature sensor sampling to actual temperature can deliver to control module and carry out internal arithmetic process, when being in high temperature, control module can send high level, and subsequent heat circuit part disconnects; When sensor sample is to low temperature; control module controls output low level; coordinate the protection circuit of comparer to work simultaneously; now 28V heating power supply connects well heater two ends to ground; comparer controls to be heated to be hardware heating, is the control carrying out heating current according to the size of heating resistor, and control module controls to be heated to be software heating; heating carries out computer heating control by PWM ripple, i.e. the length of low duration.This control method is conducive to the speed accurately controlling heating, comparatively change heating resistor and have a clear superiority in, and heat control mode of the present invention is simple.If the rate of heat addition is comparatively slow, control by changing heating duty ratio (namely by changing the heating low level duration).
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation that a kind of Automatic-heating control circuit of the present invention is described;
Fig. 2 is the circuit diagram that a kind of heater circuit of the present invention is described.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of Automatic-heating control circuit, this Automatic-heating control circuit comprises: temperature sensor, and described temperature sensor is used for detected temperatures data;
Comparer, is configured to be connected to described temperature sensor, obtains the first start signal or the first shutdown signal described temperature data and the first preset data to be compared;
Control module, is configured to be connected to described temperature sensor, obtains the second start signal or the second shutdown signal described temperature data to be carried out process;
Heater circuit, is configured to be connected to described comparer and control module, to judge whether to be heated by well heater.
In theory diagram as shown in Figures 1 and 2, the voltage of above-mentioned hardware protection is obtained by two electric resistance partial pressures, and the setting of magnitude of voltage draws to the magnitude of voltage corresponding to+15 DEG C according to temperature sensor sampling.When temperature sensor sampling to actual temperature be greater than+15 DEG C, comparer output low level, the first optocoupler (as in accompanying drawing 2 U504) can not conducting, heater circuit disconnects, by playing hardware protection effect like this; In like manner can obtain, when temperature sensor sampling to actual temperature be less than+15 DEG C, comparer export high level, the first optocoupler (U504 as in accompanying drawing 2) and subsequent conditioning circuit are opened, hardware heating part open.
As aim of the present invention, except above-mentioned hardware protection, also have a road software control, namely temperature sensor sampling to actual temperature can deliver to control module and carry out internal arithmetic.When being in high temperature, control module can send high level, and stop opening of the second optocoupler (U505 as in accompanying drawing 2), subsequent heat circuit part still disconnects; When sensor sample is to low temperature, open heating function lower than software when 5 DEG C, namely control module controls output low level; Second optocoupler (U505 as in accompanying drawing 2) optocoupler is opened, and coordinates hardware protection circuit to work simultaneously, now 28V heating power supply by the first stabilivolt (Q502 as in accompanying drawing 2) and well heater two ends to.The control of heating current is carried out according to the size of heating resistor.And software control heating is controlled by PWM ripple, i.e. the length of low duration.This control method is conducive to the speed accurately controlling heating.Comparatively change heating resistor to have a clear superiority in.Software control is simple.If the rate of heat addition is comparatively slow, control by changing heating duty ratio (namely by changing the heating low level duration).Namely the two ore control of this software plus hardware achieves the function of low-temperature heat, avoids again because device failure causes normal temperature to heat.As shown in Figure 2, wherein, the first resistance R518 resistance is very large, and when the second stabilivolt not conducting, well heater is started working for heater circuit.The resistance of our general use about a 100K resistance of R518 resistance, main application is that voltage leads function off, removes the function also not affecting whole heater circuit.
In the above-described embodiment, as shown in Figure 2, described heater circuit comprises: the first optocoupler (U504 as in accompanying drawing 2), is configured to be connected to described comparer, to receive described first start signal or the first shutdown signal;
First stabilivolt (Q502 as in accompanying drawing 2), is configured to be connected to described first optocoupler, to open according to described first start signal or to close according to described first shutdown signal;
Second optocoupler (U505 as in accompanying drawing 2), is configured to be connected to described control module, to receive described second start signal or the second shutdown signal;
Second stabilivolt (U503 as in accompanying drawing 2), is configured to be connected to described second optocoupler, to open according to described second start signal or to close according to described second shutdown signal; Second stabilivolt is voltage stabilizing, protection metal-oxide-semiconductor grid, source electrode, and cause it to puncture as conducting then illustrates that heating power supply is excessive, heater circuit lost efficacy.
Heating power supply is 28V in accompanying drawing 2, is configured to be connected to described first stabilivolt, well heater, described second stabilivolt and ground successively, and when described first stabilivolt is opened and described second stabilivolt is opened, described well heater heats.
By such embodiment, when achieving the first stabilivolt and the second stabilivolt conducting, well heater heats.
In this kind of embodiment, described heater circuit also comprises: triode, and the base stage of described triode is connected to described comparer, and the collector of described triode is connected to described first optocoupler, the grounded emitter of described triode.
In this kind of embodiment, this Automatic-heating control circuit also comprises: sample circuit, one end of described sample circuit is configured to be connected to described temperature sensor to receive temperature data, the other end is configured to be connected to described comparer and described control module, to send described temperature data.
In this kind of embodiment, this Automatic-heating control circuit also comprises: D/A converting circuit, described D/A converting circuit is connected between described sample circuit and described control module, the simulating signal of described temperature data to be converted to the digital signal stated control module and can accept.
In this kind of embodiment, described control module is single-chip microcomputer, and this is a kind of embodiment, can certainly be other embodiment, all belong to protection scope of the present invention.
The invention provides a kind of display, described display comprises: according to above-mentioned Automatic-heating control circuit, this kind of display can realize Automatic-heating, the overall brightness that can overcome liquid crystal display declines, color color is desalinated, and contrast reduces rapidly, the problem that the response time that image loads extends, effectively prevent when temperature drops to-30 DEG C of blackouts caused, liquid crystal display becomes the problem of normal white state.
The invention provides a kind of heating means, according to above-mentioned Automatic-heating control circuit, the method comprises:
S101, the temperature data of warmware to be added of sampling;
S102, is compared temperature data and preset data by comparer;
S103, when described temperature data is greater than described preset data, described comparer exports the first start signal; When described temperature data is less than or equal to described preset data, described comparer exports the first shutdown signal;
S104, is undertaken processing to obtain the second start signal or the second shutdown signal by control module by described temperature data;
S105, when described heater circuit receives the first start signal and the second start signal, well heater heats.
In this kind of embodiment, described second start signal is pulse width modulation wave signal, and this signal is convenient to be controlled, and according to the duration of low pressure, can accurately control the time of heating.
In this kind of embodiment, the heating power supply voltage of described heater circuit is 28V, and this one preferred embodiment.
As can be seen from accompanying drawing 1 we, this Automatic-heating control circuit, there is one or more sensor, the temperature data that temperature sensor obtains delivers to control module (single-chip microcomputer) after sample circuit, control module is through computing and judgement, export the signal of the PWM ripple (heating) of corresponding high level (not heating) or described control module to heating control circuit, control circuit opens or closes heating electrode according to these data again, thus realizes the effect automatically controlling heating.
In the present invention, after hardware and software opens heating simultaneously, heater circuit is started working, HEATER1 and HEATER2 that Fig. 2 shows, be two electrodes of well heater, well heater produces Joule heat immediately, heat to liquid crystal display, the normal display of liquid crystal display under guarantee low temperature.
When heating a period of time or under getting back to normal temperature or high-temperature condition, hardware protection is opened, after main control chip sampling high-temperature temperature value, export high level, prevent opening of the second optocoupler (U505 as shown in Figure 2), well heater cuts out.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. an Automatic-heating control circuit, is characterized in that, this Automatic-heating control circuit comprises: temperature sensor, and described temperature sensor is used for detected temperatures data;
Comparer, is configured to be connected to described temperature sensor, obtains the first start signal or the first shutdown signal described temperature data and the first preset data to be compared;
Control module, is configured to be connected to described temperature sensor, obtains the second start signal or the second shutdown signal described temperature data to be carried out process;
Heater circuit, is configured to be connected to described comparer and control module, to judge whether to be heated by well heater.
2. Automatic-heating control circuit according to claim 1, is characterized in that, described heater circuit comprises: the first optocoupler, is configured to be connected to described comparer, to receive described first start signal or the first shutdown signal;
First stabilivolt, is configured to be connected to described first optocoupler, to open according to described first start signal or to close according to described first shutdown signal;
Second optocoupler, is configured to be connected to described control module, to receive described second start signal or the second shutdown signal;
Second stabilivolt, is configured to be connected to described second optocoupler, to open according to described second start signal or to close according to described second shutdown signal;
Heating power supply, be configured to be connected to described first stabilivolt, well heater, described second stabilivolt and ground successively, also be connected with the first resistance between described well heater and ground, when described first stabilivolt is opened and described second stabilivolt is closed, described well heater heats.
3. Automatic-heating control circuit according to claim 2, it is characterized in that, described heater circuit also comprises: triode, and the base stage of described triode is connected to described comparer, the collector of described triode is connected to described first optocoupler, the grounded emitter of described triode.
4. Automatic-heating control circuit according to claim 1, it is characterized in that, this Automatic-heating control circuit also comprises: sample circuit, one end of described sample circuit is configured to be connected to described temperature sensor to receive temperature data, the other end is configured to be connected to described comparer and described control module, to send described temperature data.
5. Automatic-heating control circuit according to claim 4, it is characterized in that, this Automatic-heating control circuit also comprises: D/A converting circuit, described D/A converting circuit is connected between described sample circuit and described control module, the simulating signal of described temperature data to be converted to the digital signal stated control module and can accept.
6. Automatic-heating control circuit according to claim 1, is characterized in that, described control module is single-chip microcomputer.
7. a display, is characterized in that, described display comprises: according to the Automatic-heating control circuit in claim 1-6 described in any one.
8. heating means, is characterized in that, according to the Automatic-heating control circuit in claim 1-6 described in any one, the method comprises:
S101, the temperature data of warmware to be added of sampling;
S102, is compared temperature data and preset data by comparer;
S103, when described temperature data is greater than described preset data, described comparer exports the first start signal; When described temperature data is less than or equal to described preset data, described comparer exports the first shutdown signal;
S104, is undertaken processing to obtain the second start signal or the second shutdown signal by control module by described temperature data;
S105, when described heater circuit receives the first start signal and the second shutdown signal, well heater heats.
9. heating means according to claim 8, is characterized in that, described second start signal is pulse width modulation wave signal.
10. heating means according to claim 8, is characterized in that, the heating power supply voltage of described heater circuit is 28V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410674262.6A CN104407646B (en) | 2014-11-21 | 2014-11-21 | Automatic heating control circuit, display and heating means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410674262.6A CN104407646B (en) | 2014-11-21 | 2014-11-21 | Automatic heating control circuit, display and heating means |
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| CN104407646A true CN104407646A (en) | 2015-03-11 |
| CN104407646B CN104407646B (en) | 2017-06-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104765392A (en) * | 2015-03-24 | 2015-07-08 | 中航华东光电有限公司 | Heating control system, liquid crystal display module and heating control method |
| CN107272771A (en) * | 2017-06-16 | 2017-10-20 | 深圳市共进电子股份有限公司 | The heater and method of main control chip |
| CN108797058A (en) * | 2017-04-28 | 2018-11-13 | 青岛海尔洗衣机有限公司 | A kind of heater for clothes dryer temperature detection and protective device |
| CN111552330A (en) * | 2020-04-03 | 2020-08-18 | 深圳市优***科技股份有限公司 | Screen heating control method and system applied to terminal starting |
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| CN2660560Y (en) * | 2003-08-22 | 2004-12-01 | 中国人民解放军第二炮兵第一研究所 | LCD device having low temp heatingand controlling function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104765392A (en) * | 2015-03-24 | 2015-07-08 | 中航华东光电有限公司 | Heating control system, liquid crystal display module and heating control method |
| CN108797058A (en) * | 2017-04-28 | 2018-11-13 | 青岛海尔洗衣机有限公司 | A kind of heater for clothes dryer temperature detection and protective device |
| CN107272771A (en) * | 2017-06-16 | 2017-10-20 | 深圳市共进电子股份有限公司 | The heater and method of main control chip |
| CN111552330A (en) * | 2020-04-03 | 2020-08-18 | 深圳市优***科技股份有限公司 | Screen heating control method and system applied to terminal starting |
| CN111552330B (en) * | 2020-04-03 | 2021-08-03 | 深圳市优***科技股份有限公司 | Screen heating control method and system applied to terminal starting |
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| CN104407646B (en) | 2017-06-30 |
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