CN103677048A - Drive circuit and electronic device - Google Patents
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- CN103677048A CN103677048A CN201310642036.5A CN201310642036A CN103677048A CN 103677048 A CN103677048 A CN 103677048A CN 201310642036 A CN201310642036 A CN 201310642036A CN 103677048 A CN103677048 A CN 103677048A
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Abstract
The invention provides a drive circuit and an electronic device. A soft start module is used for receiving an externally input first signal and outputting a second signal; rising speed of voltage of the second signal meets a first preset condition. A voltage stabilizing module is used for controlling stable voltage for the second signal output by the soft start module and outputting a stabilized voltage third signal to a circuit board. The voltage stabilizing module is connected with both the soft start module and the circuit board. Therefore, damage of devices in the circuit, caused by changes in input voltage, can be avoided, and normal use of the electronic device is ensured.
Description
Technical field
The present invention relates to electronic technology field, specifically can relate to a kind of driving circuit and electronic installation.
Background technology
Existing electronic installation forms by some circuit (or circuit board) of realizing difference in functionality, for example included various circuit boards and chip in liquid crystal display.
And in available circuit plate and chip, exist some to the variation of external input voltage than more sensitive device or circuit, when the change in voltage amplitude of outside input is larger, may exist device or circuit to occur situation damaged and that puncture, this has affected the normal use of electronic installation.
Summary of the invention
The invention provides a kind of driving circuit and electronic installation, thereby can avoid device in circuit because impaired situation appears in the variation of input voltage, guarantee the normal use of electronic installation.
The invention provides scheme as follows:
The embodiment of the present invention provides a kind of driving circuit, comprising:
For receiving the first signal of outside input and exporting the soft-start module of secondary signal, it is first pre-conditioned that the rate of voltage rise of described secondary signal meets;
The secondary signal that is used for that described soft-start module is exported is carried out voltage stabilizing control and the 3rd signal after voltage stabilizing processing is exported to the Voltage stabilizing module of a circuit board, and described Voltage stabilizing module is connected with described circuit board with described soft-start module respectively.
Preferably, described first be pre-conditionedly less than the rate of voltage rise of described first signal for the rate of voltage rise of described secondary signal; Or,
Described first pre-conditioned for the rate of voltage rise of described secondary signal be the first preset value; Or,
Described first pre-conditioned be that the rate of voltage rise of described secondary signal is in a preset range.
Preferably, described soft-start module comprises:
Diode, electric capacity, triode, the first resistance, the second resistance, variable resistor; Wherein:
The negative electrode of described diode is connected with first signal input anode, the first end of described the second resistance, the first end of described Voltage stabilizing module respectively, and the anode of described diode is connected with the base stage of the second end of described the first resistance, described triode, the first end of described electric capacity respectively;
The second end of described electric capacity, is connected with the collector of described first signal input cathode, described triode, described variable-resistance the second end, the first level input end respectively;
The emitter of described triode, is connected with the first end of described the first resistance, the second end of the second end of described the second resistance, described variable-resistance first end and described Voltage stabilizing module respectively.
Preferably, described the first level input end is connected with ground.
Preferably, described driving circuit also comprises:
Be used for monitoring described circuit board working current; and be greater than or during lower than the second preset value when the working current numerical value of described circuit board; to described Voltage stabilizing module, send the protection control module of conditioning signal; described conditioning signal; for the working current of described circuit board is adjusted to described the second preset value, described protection control module is connected with described Voltage stabilizing module with described circuit board respectively.
Preferably, described Voltage stabilizing module, also the conditioning signal for sending based on described protection control module, carries out voltage-regulation to described the 3rd signal of output.
Preferably, described protection control module comprises:
For gathering the sampling unit of described circuit board working current;
For judging magnitude relationship between current values that described sampling unit gathers and described the second preset value, and based on judged result, the processing unit of transmission conditioning signal.
Preferably, described protection control module also comprises:
For the conditioning signal of the described circuit board working current signal of described sampling unit collection and the transmission of described processing unit is carried out to signal, amplify the amplifying unit of processing, described amplifying unit is connected with described sampling unit, Voltage stabilizing module respectively;
The converting unit of carrying out analog to digital conversion and the conditioning signal of described processing unit transmission is carried out to digital-to-analog conversion for the described circuit board working current signal after described amplifying unit is processed, described converting unit is connected with described amplifying unit, processing unit respectively.
Preferably, described protection control module also comprises:
For showing the judged result of described circuit board working current numerical value and described processing unit, and receive the touch-display unit of the adjusting control signal of outside input.
Preferably, described protection control module also comprises:
For the alarm unit of reporting to the police when described processing unit judges that the working current numerical value of described circuit board is greater than or less than described the second preset value and processing.
The embodiment of the present invention also provides a kind of electronic installation, and this electronic installation specifically can comprise the driving circuit that the described embodiment of the present invention provides.
From the above, can find out, driving circuit provided by the invention and electronic installation, by being provided for receiving the first signal of outside input and exporting the soft-start module of secondary signal, it is first pre-conditioned that the rate of voltage rise of described secondary signal meets; The secondary signal that is used for that described soft-start module is exported is carried out voltage stabilizing control and the 3rd signal after voltage stabilizing processing is exported to the Voltage stabilizing module of a circuit board, and described Voltage stabilizing module is connected with described circuit board with described soft-start module respectively.Thereby can avoid device in circuit because impaired situation appears in the variation of input voltage, guarantee the normal use of electronic installation.
Accompanying drawing explanation
The driving circuit structure schematic diagram one that Fig. 1 provides for the embodiment of the present invention;
The soft-start module structural representation that Fig. 2 provides for the embodiment of the present invention;
The driving circuit structure schematic diagram two that Fig. 3 provides for the embodiment of the present invention;
The protection control module structural representation one that Fig. 4 provides for the embodiment of the present invention;
The processing unit schematic diagram that Fig. 5 provides for the embodiment of the present invention;
The protection control module structural representation two of Fig. 6 for providing for the embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing of the embodiment of the present invention, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on described embodiments of the invention, the every other embodiment that those of ordinary skills obtain, belongs to the scope of protection of the invention.
Unless otherwise defined, technical term used herein or scientific terminology should be and in field, have the ordinary meaning that the personage of general technical ability understands under the present invention." first " of using in patent application specification of the present invention and claims, " second " and similar word do not represent any order, quantity or importance, and are just used for distinguishing different ingredients.Equally, the similar words such as " " or " " do not represent restricted number yet, and mean and have at least one." connection " or " being connected " etc. similarly word be not defined in connection physics or machinery, but can comprise electrical connection, no matter be directly or indirectly." on ", D score, " left side ", " right side " etc. are only for representing relative position relation, after being described the absolute position of object and changing, this relative position relation also correspondingly changes.
The embodiment of the present invention provides a kind of driving circuit, and as shown in Figure 1, this driving circuit specifically can comprise:
For receiving the first signal of outside input and exporting the soft-start module 1 of secondary signal, it is first pre-conditioned that the rate of voltage rise of described secondary signal meets;
The secondary signal that is used for that described soft-start module 1 is exported is carried out voltage stabilizing control and the 3rd signal after voltage stabilizing processing is exported to the Voltage stabilizing module 2 of a circuit board, and Voltage stabilizing module 2 is connected with described circuit board with soft-start module 1 respectively.
The driving circuit that the embodiment of the present invention provides, can realize the control to output signal voltage ascending velocity, thereby can avoid device in circuit because impaired situation appears in the variation of input voltage, guarantees the normal use of electronic installation.
Related first pre-conditioned in the embodiment of the present invention, specifically can be at least one in following situation:
The rate of voltage rise of secondary signal is less than the rate of voltage rise of first signal; Or,
The rate of voltage rise of secondary signal is the first preset value; Or,
The rate of voltage rise of secondary signal is in a preset range.
These are only the example explanation of the condition that need to meet the rate of voltage rise of the related secondary signal of the embodiment of the present invention, when specific implementation, can also, based on actual needs, the condition that secondary signal rate of voltage rise need to meet be set flexibly.
In order to realize the control to output signal voltage ascending velocity, in one embodiment, as shown in Figure 2, the related soft-start module 1 of the embodiment of the present invention specifically can comprise:
Diode D1, capacitor C 1, triode T1, the first resistance R 1, the second resistance R 2, variable resistor R3;
Wherein:
The negative electrode of diode D1 can be connected with the positive pole of first signal input end, the first end of the first end of the second resistance R 2, Voltage stabilizing module 2 respectively, and the anode of diode D1 can be connected with the second end of the first resistance R 1, the first end of the base stage of triode T1, capacitor C 1 respectively;
The second end of capacitor C 1 can be respectively with the collector of first signal input cathode, triode T1, the second end of variable resistor R3, the first level input end be connected;
The emitter of triode T1 can be connected with first end, the second end of the second resistance R 2, second end of the first end of variable resistor R3 and Voltage stabilizing module 2 of the first resistance R 1 respectively.
In soft-start module 2 circuit as shown in Figure 2, when first signal input end input first signal when soft-start module circuit starts to start, characteristic due to capacitor C 1, the voltage at capacitor C 1 two ends can not raise suddenly, the base voltage that makes triode T1 is 0, not conducting of triode T1; Along with the variation of time, the voltage at capacitor C 1 two ends increases rising gradually, when the voltage of capacitor C 1 first end is increased to the forward voltage that is greater than triode T1, and triode T1 conducting, thus make soft-start module 1 to Voltage stabilizing module 2 output secondary signals; The follow-up continuation along with the time changes, and the voltage at capacitor C 1 two ends continues to rise, and soft-start module 1 also will continue rising to the voltage of the secondary signal of Voltage stabilizing module 2 outputs, until reach the voltage of first signal, and for example 12V or higher voltage.
So visible, in the soft-start module concrete structure shown in accompanying drawing 2 forms, by capacitor C 1, controlled the secondary signal rate of voltage rise of soft-start module 1 output, therefore, the driving circuit that the embodiment of the present invention provides is when specific implementation, demand that can be based on to secondary signal rate of voltage rise, selects corresponding capacitor C 1, such as electric capacity of 10u F etc.
In the soft-start module concrete structure shown in accompanying drawing 2 forms, because triode T1 can exist a forward voltage, be generally 0.3V etc., therefore, triode T1 can play the effect of signal output switch.When specific implementation, can, based on actual needs, select corresponding triode T1 as signal output switch, for example MPS2907 type so.
And the related concrete model of diode D1(is IN4001 type in the soft-start module concrete structure shown in accompanying drawing 2 forms) and each resistance, can play the effect that intercepts electric current (for example D1, R3), protection (for example R2), forms pressure reduction (for example R1).Wherein resistance R 1 also can be removed, and variable resistor R3 also can become the resistance of fixed resistance value.Be that the embodiment of the present invention provides, soft-start module circuit as shown in Figure 2 can be based on carrying out the change of device and connected mode.
In the soft-start module concrete structure shown in accompanying drawing 2 forms, the first level input end specifically can be connected with ground, can be also the signal input part of other level values.
In addition, the Voltage stabilizing module 2 that the embodiment of the present invention is related, also can, according to the difference of soft-start module 1 applied signal voltage, select different model device to realize.
Here it should be noted that, the soft-start module the electric circuit constitute shown in accompanying drawing 2, is only exemplary illustration, and in the driving circuit practical application providing in the embodiment of the present invention, soft-start module 1 can also form realization by other circuit structures, at this, will not enumerate.
The driver module visible, the embodiment of the present invention provides, when circuit is opened, can control output signal voltage and rise slowly, can not cause the unexpected variation due to voltage to make back end device (as circuit board, chip etc.) impaired.
In order to realize the protection to circuit board, in another specific embodiment, as shown in Figure 3, driving circuit that the embodiment of the present invention provides, specifically can also comprise:
For monitoring the working current of a circuit board; and be greater than or during lower than the second preset value when this circuit board working current numerical value; to Voltage stabilizing module 2, send the protection control module 3 of conditioning signal; this conditioning signal; for the working current of this circuit board is adjusted to the second preset value, protection control module 3 specifically can be connected with Voltage stabilizing module 2 with described circuit board respectively.
It is the driving circuit that the embodiment of the present invention provides; in real time monitoring receives the working current of the circuit board (or chip, device etc.) of the 3rd signal of Voltage stabilizing module 2 outputs; when the working current of this circuit board is greater than or less than a preset value; by regulating the voltage of the 3rd signal of Voltage stabilizing module 2 outputs; thereby control operating voltage and the working current of this circuit; thereby realize the effect to the real-time guard of this circuit and constant current, avoid circuit to occur the situation that cause thermal damage or undertension cannot be worked.
The Voltage stabilizing module 2 visible, the embodiment of the present invention is related, also has the conditioning signal sending based on protection control module 3, the function that the voltage of the 3rd signal of output is regulated.
In one embodiment, as shown in Figure 4, protection control module 3 specifically can comprise:
Sampling unit 31 for collecting circuit board working current;
For judging magnitude relationship between electric current that sampling unit 31 gathers and the second preset value, and based on judged result, the processing unit 32 of transmission conditioning signal.
The processing unit 32 that the embodiment of the present invention is related, specifically can be by a chip microcontroller, and as shown in Figure 5, this single-chip microcomputer specifically can be comprised of devices such as chip, exclusion, slide rheostat, external-connected port, auxiliary circuits.In the embodiment of the present invention, can the requirement to current precision based on circuit, select the single-chip microcomputer of different accuracy.
In the embodiment of the present invention, sampling unit 31 specifically can be a sampling resistor, and for fear of circuit board monitored and sampling is impacted, the resistance of this sampling resistor is relatively little.
In another specific embodiment of the present invention, in order to guarantee that the current values that sampling unit 31 gathers can effectively extract and process in processed unit 33, as shown in Figure 6, in the related protection control module 3 of the embodiment of the present invention, specifically can also comprise:
For the circuit board working current signal that sampling unit 31 is gathered, carry out signal and amplify the amplifying unit 33 of processing, amplifying unit 33 can be connected with sampling unit 31.
In addition, the processing unit 32 related due to the embodiment of the present invention specifically can be a single-chip microcomputer, and single-chip microcomputer is digital circuit, therefore, as shown in Figure 6, in the related protection control module 3 of the embodiment of the present invention, specifically can also comprise:
For the circuit board working current signal after amplifying unit 33 is processed, carry out analog-to-digital converting unit 34.Converting unit 34 specifically can be connected with processing unit 32 with amplifying unit 33 respectively.
Like this, the current values that sampling unit 31 gathers, after the amplification processing of amplifying unit 33 and the analog-to-digital conversion process of converting unit 34, processed unit 32 obtains.Processing unit 32 compares judgement by the current value of the current values of actual acquisition and default settings, and when the current values of actual acquisition is greater than default current value, processing unit 32 sends the conditioning signal of a downward regulation voltage to Voltage stabilizing module 2, thereby make Voltage stabilizing module 2 reduce the voltage value of the 3rd signal of its output, and when the current values of actual acquisition is less than default current value, processing unit 32 sends a conditioning signal for regulation voltage upwards to Voltage stabilizing module 2, thereby makes the raise voltage value of the 3rd signal of its outputs of Voltage stabilizing module 2.Due to the adjustment of the 3rd signal voltage, directly affect the working current numerical value of circuit board, therefore can realize the effect of circuit board constant current, avoid circuit board to occur overheated impaired or situation that undertension cannot be worked.
The conditioning signal of exporting due to processing unit 32 is digital signal, therefore, this conditioning signal need to carry out digital-to-analog conversion by converting unit 34, and the related converting unit 34 of the embodiment of the present invention, also can be used for the conditioning signal of processing unit 32 transmissions to carry out digital-to-analog conversion processing.
In the embodiment of the present invention, can the requirement to current precision based on circuit, select not the modulus/digital-to-analogue of isotopic number to turn device or circuit as converting unit 33.
And in order to make Voltage stabilizing module 2 conditioning signal that effectively extraction process unit 32 sends, the conditioning signal that 34 digital-to-analog conversions are processed through converting unit can also amplify processing by amplifying unit 33, visible, the amplifying unit 33 that the embodiment of the present invention is related, the conditioning signal that also can be used for that processing unit 32 is sent carries out signal and amplifies processing, and the conditioning signal after processing is sent to Voltage stabilizing module 2, the related amplifying unit 33 of the embodiment of the present invention, is also connected with Voltage stabilizing module 2.
In an alternate embodiment of the present invention, protection control module 3 specifically can also comprise:
For the judged result of display circuit board working current numerical value and processing unit 33, and the touch-display unit of the adjusting control signal of the outside input of reception.
Be the driving circuit that the embodiment of the present invention provides, when circuit board being carried out to monitoring in real time, every data of Real-time Obtaining can also be shown by a touch-screen.Meanwhile, this driving circuit can also receive by this touch-screen the adjusting control signal of outside input, so that processing unit 33 produces corresponding conditioning signal.
In another optional embodiment of the present invention, protection control module 3 specifically can also comprise:
For the alarm unit of reporting to the police when processing unit 33 decision circuitry plate working current numerical value are greater than or less than the second preset value and processing.Thereby can realize, there is abnormal time Realtime Alerts when monitored circuit board.
The embodiment of the present invention also provides a kind of electronic installation, and this electronic installation specifically can comprise the driving circuit that the described embodiment of the present invention provides.
This electronic installation is specifically as follows liquid crystal panel, LCD TV, liquid crystal display, OLED(Organic Light Emitting Diode) panel, OLED display, plasma display or Electronic Paper etc.
From the above, can find out, driving circuit provided by the invention and electronic installation, by being provided for receiving the first signal of outside input and exporting the soft-start module of secondary signal, it is first pre-conditioned that the rate of voltage rise of described secondary signal meets; The secondary signal that is used for that described soft-start module is exported is carried out voltage stabilizing control and the 3rd signal after voltage stabilizing processing is exported to the Voltage stabilizing module of the first circuit, and described Voltage stabilizing module is connected with described the first circuit with described soft-start module respectively.Thereby can avoid device in circuit because impaired situation appears in the variation of input voltage, guarantee the normal use of electronic installation.
The above is only embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a driving circuit, is characterized in that, comprising:
For receiving the first signal of outside input and exporting the soft-start module of secondary signal, it is first pre-conditioned that the rate of voltage rise of described secondary signal meets;
The secondary signal that is used for that described soft-start module is exported is carried out voltage stabilizing control and the 3rd signal after voltage stabilizing processing is exported to the Voltage stabilizing module of a circuit board, and described Voltage stabilizing module is connected with described circuit board with described soft-start module respectively.
2. driving circuit as claimed in claim 1, is characterized in that, described first is pre-conditionedly less than the rate of voltage rise of described first signal for the rate of voltage rise of described secondary signal; Or,
Described first pre-conditioned for the rate of voltage rise of described secondary signal be the first preset value; Or,
Described first pre-conditioned be that the rate of voltage rise of described secondary signal is in a preset range.
3. driving circuit as claimed in claim 1, is characterized in that, described soft-start module comprises:
Diode, electric capacity, triode, the first resistance, the second resistance, variable resistor; Wherein:
The negative electrode of described diode is connected with first signal input anode, the first end of described the second resistance, the first end of described Voltage stabilizing module respectively, and the anode of described diode is connected with the base stage of the second end of described the first resistance, described triode, the first end of described electric capacity respectively;
The second end of described electric capacity, is connected with the collector of described first signal input cathode, described triode, described variable-resistance the second end, the first level input end respectively;
The emitter of described triode, is connected with the first end of described the first resistance, the second end of the second end of described the second resistance, described variable-resistance first end and described Voltage stabilizing module respectively.
4. driving circuit as claimed in claim 3, is characterized in that, described the first level input end is connected with ground.
5. the driving circuit as described in claim 1 to 4 any one, is characterized in that, also comprises:
Be used for monitoring described circuit board working current; and be greater than or during lower than the second preset value when the working current numerical value of described circuit board; to described Voltage stabilizing module, send the protection control module of conditioning signal; described conditioning signal; for the working current of described circuit board is adjusted to described the second preset value, described protection control module is connected with described Voltage stabilizing module with described circuit board respectively.
6. driving circuit as claimed in claim 5, is characterized in that, described Voltage stabilizing module, and also the conditioning signal for sending based on described protection control module, carries out voltage-regulation to described the 3rd signal of output.
7. driving circuit as claimed in claim 5, is characterized in that, described protection control module comprises:
For gathering the sampling unit of described circuit board working current;
For judging magnitude relationship between current values that described sampling unit gathers and described the second preset value, and based on judged result, the processing unit of transmission conditioning signal.
8. driving circuit as claimed in claim 7, is characterized in that, described protection control module also comprises:
For the conditioning signal of the described circuit board working current signal of described sampling unit collection and the transmission of described processing unit is carried out to signal, amplify the amplifying unit of processing, described amplifying unit is connected with described sampling unit, Voltage stabilizing module respectively;
The converting unit of carrying out analog to digital conversion and the conditioning signal of described processing unit transmission is carried out to digital-to-analog conversion for the described circuit board working current signal after described amplifying unit is processed, described converting unit is connected with described amplifying unit, processing unit respectively.
9. driving circuit as claimed in claim 7, is characterized in that, described protection control module also comprises:
For showing the judged result of described circuit board working current numerical value and described processing unit, and receive the touch-display unit of the adjusting control signal of outside input.
10. driving circuit as claimed in claim 7, is characterized in that, described protection control module also comprises:
For the alarm unit of reporting to the police when described processing unit judges that the working current numerical value of described circuit board is greater than or less than described the second preset value and processing.
11. 1 kinds of electronic installations, is characterized in that, comprise the driving circuit as described in claim 1 to 10 any one.
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| CN103677048B (en) | 2015-11-11 |
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