CN108011528A - A kind of light modulation film power source special - Google Patents
A kind of light modulation film power source special Download PDFInfo
- Publication number
- CN108011528A CN108011528A CN201810028403.5A CN201810028403A CN108011528A CN 108011528 A CN108011528 A CN 108011528A CN 201810028403 A CN201810028403 A CN 201810028403A CN 108011528 A CN108011528 A CN 108011528A
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- Prior art keywords
- switching tube
- light modulation
- circuit
- modulation film
- power source
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of light modulation film power source special, belong to electronic circuit technology field.The light modulation film power source special includes：First rectification circuit, concussion reduction voltage circuit, the second rectification circuit, inverter circuit and control module.The light modulation film power source special gives commercial power rectification to concussion reduction voltage circuit using the first rectification circuit into the first direct current electricity output, again the first exchange electricity output is reverse into through the concussion reduction voltage circuit, the second direct current is exported after the second rectifier circuit rectifies again, inversion is carried out to the second direct current after rectification using inverter circuit again, you can obtain as the alternating voltage needed for the power supply of liquid crystal light modulation film.By varying the frequency of the pulse signal of control module output, you can change the frequency of inverter circuit output voltage, so that the frequency-adjustable of final output voltage, and then solve the problems, such as liquid crystal light modulation film stroboscopic.
Description
Technical field
The invention belongs to electronic circuit technology field, and in particular to a kind of light modulation film power source special.
Background technology
Liquid crystal light modulation film is the injection liquid crystal/polymer mixing material among two nesa coatings, is made in no electric field
In the case of, liquid crystal light modulation film is in opaque state；After energization, the liquid crystal in film is set to arrange in order under electric field action
Row, make film that pellucidity be presented.By electric field action, can realize from quick between ON state-OFF state, OFF state → ON state
Conversion.It can be seen that the performance of liquid crystal light modulation film and the power supply powered for it are closely bound up, for example, when long-time service DC power supply,
It can cause liquid crystal light modulation film jaundice, influence its transparency；Also alternatively, using existing alternating current (frequency 50/60Hz, electricity
Press as 18-75V) power supply, when the transparent projection of projector is done using film, flicker occurs when beating on the thin film in projection
Problem.Therefore, a power source special is developed for liquid crystal light modulation film, to improve above-mentioned defect, becomes industry personnel pass
The focus of note.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of light modulation film power source special, effectively to improve the above problem.
What the embodiment of the present invention was realized in：
An embodiment of the present invention provides a kind of light modulation film power source special, including：First rectification circuit, concussion reduction voltage circuit,
Second rectification circuit, inverter circuit and control module.The control module shakes reduction voltage circuit and the inversion with described respectively
Circuit connects, and first rectification circuit, concussion reduction voltage circuit, second rectification circuit and the inverter circuit are successively
Connection, first rectification circuit are additionally operable to be electrically connected with city, and the inverter circuit is additionally operable to be connected with liquid crystal light modulation film.It is described
First rectification circuit is used for the commercial power rectification into the first direct current electricity output.The concussion reduction voltage circuit is used for according to the control
First DC inverter is the first exchange electricity output by the pulse signal of molding block output.Second rectification circuit is used for
By first AC rectification into the second direct current electricity output.The inverter circuit is used for the arteries and veins exported according to the control module
It is the second exchange electricity output that signal, which is rushed, by second DC inverter, is powered for the liquid crystal light modulation film.
In optional embodiment of the present invention, the concussion reduction voltage circuit includes：First switch pipe and transformer, the city
Electricity accesses the armature winding of the transformer after first rectifier circuit rectifies, one end of the armature winding and described the
One switching tube first end connection, the first switch pipe second end ground connection, the 3rd end of the first switch pipe with it is described
Control module connects, and the secondary windings of the transformer is connected with second rectification circuit, and the control module is not by between
The ON/OFF of the disconnected control first switch pipe, so that exchange waveform is produced on the armature winding, and then by described in
First DC inverter is the first exchange electricity output.
In optional embodiment of the present invention, the first switch pipe is N-channel MOS pipe, the grid of the N-channel MOS pipe
Pole is connected with the control module, the source electrode ground connection of the N-channel MOS pipe, drain electrode and the primary of the N-channel MOS pipe
One end connection of winding.
In optional embodiment of the present invention, it is full bridge inverter to state inverter circuit.
In optional embodiment of the present invention, the inverter circuit includes：Second switch pipe, the 3rd switching tube, the 4th open
Close pipe and the 5th switching tube；The first end of the second switch pipe and the first end of the 3rd switching tube are whole with described second
Current circuit connects, the second end of the second switch pipe first end with the 4th switching tube and the liquid crystal light modulation film respectively
Power end connection, the second end of the 4th switching tube is connected with the second end of the 5th switching tube, and the described 5th switchs
The first end of pipe is connected with the second end of the 3rd switching tube and the power end of the liquid crystal light modulation film respectively, and the described 5th opens
The second end for closing pipe is also grounded, the 3rd end of the second switch pipe, the 3rd end of the 3rd switching tube, the 4th switch
3rd end of pipe and the 3rd end of the 5th switching tube are connected with the control module.
In optional embodiment of the present invention, the second switch pipe, the 3rd switching tube, the 4th switching tube and
5th switching tube is N-channel MOS pipe, and the drain of the drain of the second switch pipe and the 3rd switching tube is and institute
State the connection of the second rectification circuit, the source electrode of the second switch pipe drain with the 4th switching tube and the liquid crystal tune respectively
The power end connection of light film, the source electrode of the 4th switching tube are connected with the source electrode of the 5th switching tube, the 5th switch
The drain of pipe is connected with the source electrode of the 3rd switching tube and the power end of the liquid crystal light modulation film respectively, the 5th switching tube
Source electrode be also grounded, the grid of the second switch pipe, the grid of the 3rd switching tube, the 4th switching tube grid and
The grid of 5th switching tube is connected with the control module.
In optional embodiment of the present invention, first rectification circuit is bridge rectifier.
In optional embodiment of the present invention, second rectification circuit is rectifier diode.
In optional embodiment of the present invention, the light modulation film power source special further includes：Wave filter, the inverter circuit
Output terminal is connected by the wave filter with the liquid crystal light modulation film.
In optional embodiment of the present invention, the wave filter is sine wave filter.
Light modulation film power source special provided in an embodiment of the present invention, including：First rectification circuit, concussion reduction voltage circuit, second
Rectification circuit, inverter circuit and control module.The control module shakes reduction voltage circuit and the inverter circuit with described respectively
Connection, first rectification circuit, concussion reduction voltage circuit, second rectification circuit and the inverter circuit connect successively
Connect, first rectification circuit is additionally operable to be electrically connected with city, and the inverter circuit is additionally operable to be connected with liquid crystal light modulation film.The light modulation
Film power source special gives commercial power rectification to the concussion reduction voltage circuit using the first rectification circuit into the first direct current electricity output, then through being somebody's turn to do
Concussion reduction voltage circuit is reverse into the first exchange electricity output, then the second direct current is exported after the second rectifier circuit rectifies, then uses
Inverter circuit carries out inversion to the second direct current after rectification, you can obtains as the alternating voltage needed for the power supply of liquid crystal light modulation film.
By varying the frequency of the pulse signal of control module output, you can change the frequency of inverter circuit output voltage, so that
The frequency-adjustable of final output voltage, is no longer the fixed frequency as mains frequency (50/60Hz), and then solves liquid
The problem of brilliant light modulation film stroboscopic.In addition, special power management chip is not required in light modulation film power source special, you can realizes to voltage
Decompression and inversion, simplify circuit, and the decompression of voltage, section can be achieved in the control module while main control task is performed
About cost.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that or understood by implementing the embodiment of the present invention.The purpose of the present invention and other advantages can be by being write
Specifically noted structure is realized and obtained in specification, claims and attached drawing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.By the way that shown in attached drawing, above and other purpose of the invention, feature and advantage will become apparent from.In whole
Identical reference numeral indicates identical part in attached drawing.Deliberately attached drawing, emphasis are not drawn by actual size equal proportion scaling
It is the purport for showing the present invention.
Fig. 1 shows a kind of module diagram for light modulation film power source special that first embodiment of the invention provides.
Fig. 2 shows a kind of circuit diagram for light modulation film power source special that first embodiment of the invention provides.
Fig. 3 shows a kind of module diagram for light modulation film power source special that second embodiment of the invention provides.
Fig. 4 shows a kind of circuit diagram for light modulation film power source special that second embodiment of the invention provides.
Icon：10A- light modulation film power source specials；10B- light modulation film power source specials；The first rectification circuits of 11-；12- shakes
Swing reduction voltage circuit；The second rectification circuits of 13-；14- inverter circuits；15- control modules；The first sample circuits of 16-；17- is filtered
Ripple device.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention implementation being usually described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this area is common
Technical staff's all other embodiments obtained without creative efforts, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " interior ",
The orientation or position relationship of instructions such as " outer " be based on orientation shown in the drawings or position relationship, or the invention product use
When the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or dark
Show relative importance.
In the description of the present invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can also be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two
Connection inside element.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood in the present invention
In concrete meaning.
Inventor is had found when liquid crystal light modulation film long-time service direct current, can cause the jaundice of liquid crystal light modulation film, to influence its saturating
Lightness, further, in view of the characteristic of direct current, electric current always flows to anode from cathode, and liquid crystal molecule is always after film is powered
Side is flowed to, eventually results in film jaundice, damage.In addition, using existing alternating current, (frequency 50/60Hz, voltage are
When 18-75V) transparent projection of projector is done in power supply using film, the problem of flicker occurs when beating on the thin film is projected,
Further study show that it is because the frequency of used electric current can not meet the requirements the frequency, it is necessary to higher, so that liquid crystal point
Son does movement arranged evenly at faster speed, so that human eye can not be differentiated, you can when solving transparence display, film flicker
Problem.
The defects of for present in above scheme is inventor being drawn after putting into practice and carefully studying as a result,
Therefore, the discovery procedure of the above problem and the solution that hereinafter embodiment of the present invention is proposed regarding to the issue above, all
It should be the contribution that inventor makes the present invention in process of the present invention.
First embodiment
An embodiment of the present invention provides a kind of light modulation film power source special 10A, as shown in Figure 1, light modulation film power source special 10A
Including：First rectification circuit 11, concussion reduction voltage circuit 12, the second rectification circuit 13, inverter circuit 14 and control module 15.
First rectification circuit 11 is connected with the concussion reduction voltage circuit 12, and is additionally operable to be electrically connected with city, this is first whole
Current circuit 11 is used for the commercial power rectification into the first direct current electricity output.First rectification circuit 11 can be rectifier bridge, also may be used
To be rectifier diode, other components for possessing rectification function are can also be.As an alternative embodiment, this first
Rectification circuit 11 is bridge rectifier, as shown in Fig. 2, due to its specific connection mode, it is very known, herein no longer
Description.
Wherein, which can be the 220V alternating currents that frequency is 50Hz or the 110V that frequency is 60Hz exchanges
Electricity, or the alternating current for the other specification in the range of other specification, such as 100-240V.
The concussion reduction voltage circuit 12 is also connected with 15 and second finishing circuit of control module respectively, the concussion decompression electricity
Road 12 is used for first direct current that will be exported according to the pulse signal that the control module 15 exports through the first rectification circuit 11
Electric inversion is the first exchange electricity output.Further, as an alternative embodiment, the concussion reduction voltage circuit 12 wraps
Include：First switch pipe Q1 and transformer T, the alternating current access the transformer T's after 11 rectification of the first rectification circuit
Armature winding, one end of the armature winding are connected with the first end of the first switch pipe Q1, the first switch pipe Q1's
Second end is grounded, and the 3rd end of the first switch pipe Q1 is connected with the control module 15, the secondary windings of the transformer T
Be connected with second rectification circuit 13, the control module 15 by the opening of the continual control first switch pipe Q1/
Close, so as to produce exchange waveform on the armature winding, and then be the first alternating current by first DC inverter
Output.
In order to make it easy to understand, as a kind of embodiment, by taking first switch pipe Q1 is the metal-oxide-semiconductor of N-channel as an example, carry out
Explanation.Further, the grid of the N-channel MOS pipe is connected with the control module 15, and the source electrode of the N-channel MOS pipe connects
Ground, the drain electrode of the N-channel MOS pipe are connected with one end of the armature winding.When N-channel MOS pipe ends, through the first rectification
The voltage that circuit 11 exports is without conversion；When the N-channel MOS pipe turns on, which is pulled low, i.e., a part of voltage warp
Armature winding, the drain electrode of N-channel MOS pipe, source electrode ground connection.If in a short time, the continual control N-channel of control module 15
The on or off of metal-oxide-semiconductor so that flow through the continual energy storage for being pulled low, possessing plus armature winding of voltage of armature winding in itself
Characteristic, so that the exchange wave of oscillation is produced on armature winding, for example, high frequency square wave.On the armature winding for resulting from transformer T
The exchange wave of oscillation is changed into the first exchange electricity output after the secondary windings decompression of transformer T.
, wherein it is desired to explanation, above-mentioned only to list the situation that first switch pipe Q1 is N-channel MOS pipe, but not
It can be understood as being limitation of the present invention, for example, first switch pipe Q1 can also be P-channel metal-oxide-semiconductor, or it is quick brilliant
Brake tube, turn-off thyristor (GTO), power transistor (GTR), gated transistor (IGBT).
Second rectification circuit 13 is also connected with the inverter circuit 14, which is used for described the
One AC rectification is gone back into the second direct current electricity output, second rectification circuit 13 with being rectifier bridge or rectifier diode
It can be the component that other possess rectification function.In the present embodiment, alternatively, which is rectifier diode
D5, further, the cathode of rectifier diode D5 are connected with one end of the secondary windings of transformer T, rectifier diode D5
Negative pole end be connected with the inverter circuit 14.
The inverter circuit 14 is also connected with the control module 15, and is additionally operable to be connected with liquid crystal light modulation film；This is inverse
Become circuit 14 to be used for second DC inverter according to the pulse signal of the control module 15 output into the second alternating current
Output, powers for the liquid crystal light modulation film.As an alternative embodiment, the inverter circuit 14 is full bridge inverter
14.Alternatively, which includes：Second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4 and the 5th are opened
Close pipe Q5；The first end of the second switch pipe Q2 and the first end of the 3rd switching tube Q3 with second rectification circuit
13 connections, the second end of the second switch pipe Q2 first end with the 4th switching tube Q4 and the liquid crystal light modulation film respectively
Power end connection, the second end of the 4th switching tube Q4 is connected with the second end of the 5th switching tube Q5, the described 5th
The first end of switching tube Q5 is connected with the second end of the 3rd switching tube Q3 and the power end of the liquid crystal light modulation film respectively, institute
The second end for stating the 5th switching tube Q5 is also grounded, the 3rd end of the second switch pipe Q2, the 3rd of the 3rd switching tube Q3 the
3rd end at end, the 3rd end of the 4th switching tube Q4 and the 5th switching tube Q5 is connected with the control module 15.
In order to make it easy to understand, in the present embodiment, with the second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4
It is that N-channel MOS pipe illustrates with the 5th switching tube Q5.Specifically, the drain of the second switch pipe Q2 and described
The drain of 3rd switching tube Q3 is connected with second rectification circuit 13, the source electrode of the second switch pipe Q2 respectively with it is described
The drain of 4th switching tube Q4 is connected with the power end of the liquid crystal light modulation film, the source electrode of the 4th switching tube Q4 and described the
The source electrode connection of five switching tube Q5, the drain of the 5th switching tube Q5 respectively with the source electrode of the 3rd switching tube Q3 and described
The power end connection of liquid crystal light modulation film, the source electrode of the 5th switching tube Q5 are also grounded, the grid of the second switch pipe Q2, institute
State the grid of the grid of the 3rd switching tube Q3, the grid of the 4th switching tube Q4 and the 5th switching tube Q5 with the control
Molding block 15 connects.
By controlling second switch pipe Q2, the 5th switching tube Q5 and the 3rd switching tube Q3, the 4th switching tube Q4 to take turns conductance
It is logical to produce alternating voltage output, for example, producing the alternating voltage output of 36V.
, wherein it is desired to explanation, above-mentioned only to list second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube
Q4 and the 5th switching tube Q5 is the situation of N-channel MOS pipe, but can not be understood as being limitation of the present invention, for example,
Second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4 and the 5th switching tube Q5 can also be P-channel metal-oxide-semiconductor, or
Person's high speed thyristor, turn-off thyristor (GTO), power transistor (GTR), gated transistor (IGBT).
The control module 15 is used to control the concussion reduction voltage circuit 12 to produce the first alternating current, further, control
Module 15 goes the time of control first switch pipe Q1 break-makes by output pulse signal (for example, PWM), and then transformer T's
Exchange waveform is produced on armature winding, is depressured by secondary windings, so that first DC inverter be handed over for first
Galvanic electricity exports.In addition, the control module 15, which is additionally operable to control inverter circuit 14, produces the second alternating current, further, further
Ground, control module 15 go control second switch pipe Q2, the 3rd switching tube Q3, the 4th by output pulse signal (for example, SPWM)
The make-and-break time of switching tube Q4 and the 5th switching tube Q5, for example, by taking turns flow control second switch pipe Q2, the 5th switching tube Q5
And the 3rd switching tube Q3, the 4th switching tube Q4 conducting can produce alternating voltage output.Wherein, second switch pipe Q2 and
Five switching tube Q5 are simultaneously turned on or turned off；3rd switching tube Q3's and the 4th switching tube Q4 simultaneously turning on or turning off.
The frequency of the pulse signal exported by varying control module 15, you can change the frequency of 14 output voltage of inverter circuit
Rate, so that the frequency-adjustable of final output voltage, is no longer the fixed frequency as mains frequency (50/60Hz).
In the present embodiment, the frequency of the second alternating current (such as 36V) exported through inverter circuit 14 is 2-100Hz.
, wherein it is desired to explanation, the type of the pulse signal exported by varying control module 15, can obtain difference
The output voltage of type, for example, during according to PWM, output voltage is square wave, and during using SPWM, output voltage is sine wave.Its
In, it is necessary to which explanation, a control module 15 can be shared by shaking reduction voltage circuit 12 and inverter circuit 14, can also be right respectively
A control module 15 is answered, for example, concussion reduction voltage circuit 12 corresponds to a control module 15, further, shakes reduction voltage circuit
12 first direct currents that will be exported for the pulse signal exported according to first control module 15 through the first rectification circuit 11
Electric inversion is the first exchange electricity output.Inverter circuit 14 corresponds to another control module 15, and further, which uses
In second DC inverter is exchanged electricity output for second according to the pulse signal that second control module 15 exports, for institute
State the power supply of liquid crystal light modulation film.
Wherein, the control module 15 can be a kind of IC chip, have the disposal ability of signal.Above-mentioned control
Molding block 15 can be general processor, including central processing unit (Central Processing Unit, CPU), network processes
Device (Network Processor, NP) etc.；Can also be digital signal processor (Digital Signal Processing,
DSP), application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate
Array (Field Programmable GateArray, FPGA) either other programmable logic device, discrete gate or crystal
Pipe logical device, discrete hardware components.General processor can be microprocessor or the control module 15 can also be any
Conventional processor etc..In this present embodiment, it is preferable that the control module 15 is the microcontroller of 32, for example,
The models such as STM32F103C8T6, STM32F103VET6 so that the frequency error of setting is very small, and waveform is more accurate.
, wherein it is desired to illustrate, the load R in Fig. 2 is equivalent to liquid crystal light modulation film.
Second embodiment
Light modulation film power source special 10B is present embodiments provided, compared with first embodiment, as shown in figure 3, its difference
It is, light modulation film power source special 10B is further included：First sample circuit 16 and wave filter 17.
The output terminal of second rectification circuit 13, the i.e. anode of rectification diode D5 are also through the first sample circuit 16 and control
Molding block 15 connects.First sample circuit 16 is used to sample the second direct current exported through the rectification circuit 13,
And sampled voltage is fed back into the control module 15, so that the control module 15 is according to the sampled voltage de-regulation
Reduction voltage circuit 12 is shaken, so that output voltage voltage stabilizing.As a kind of embodiment, as shown in figure 4, first sample circuit 16
For slide rheostat R0.Further, the slide plate of the slide rheostat is connected with the control module 15, the slip variable resistance
One end of device is connected with the rectifier diode D5, the other end ground connection of the slide rheostat.Produced by rectifier diode D5
Raw DC voltage, enters control module 15 after slide rheostat R0 partial pressures.
As another embodiment, which includes：First resistor R1 and second resistance R2.Described
One end of one resistance R1 is connected, further, one end of first resistor R1 and rectifier diode with second rectification circuit 13
The negative pole end connection of D5, the other end of the first resistor R1 respectively with the control module 15 and the second resistance R2 one
End connection, the other end ground connection of the second resistance R2.The DC voltage produced by rectifier diode D5, through first resistor R1
With enter control module 15 after second resistance R2 partial pressures.
The output terminal of the inverter circuit 14 is connected by the wave filter 17 with the liquid crystal light modulation film, by selecting not
The filter wave filter 17 of same type can obtain different waveforms, for example, sine wave, square wave etc., and then improve liquid crystal light modulation film
Performance, reaches optimum state.For example, it is desired to when obtaining the output voltage of pure sine wave, sine wave filter 17 is selected
.
Further, it is also possible to be arranged as required to overcurrent/overvoltage protection threshold, as a kind of embodiment, adopted by second
The magnitude of voltage and/or the size of current value that sample circuit (not shown) collection inverter circuit 14 exports, 15 basis of control module
The magnitude of voltage of second sample circuit collection and/or the size of current value are carried out with corresponding default overcurrent/overvoltage protection threshold
Compare, when more than or equal to preset value, cut off the circuit, to protect liquid crystal light modulation film and light modulation film power source special 10B, avoid
Damage.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. light modulation film power source special, it is characterised in that including：First rectification circuit, concussion reduction voltage circuit, the second rectified current Road, inverter circuit and control module, the control module are connected with the concussion reduction voltage circuit and the inverter circuit respectively, institute State the first rectification circuit, the concussion reduction voltage circuit, second rectification circuit and the inverter circuit are sequentially connected, described the One rectification circuit is additionally operable to be electrically connected with city, and the inverter circuit is additionally operable to be connected with liquid crystal light modulation film；First rectification circuit is used for the commercial power rectification into the first direct current electricity output；The concussion reduction voltage circuit is used for First exchange electricity output；Second rectification circuit is used for first AC rectification into the second direct current electricity output；It is second by second DC inverter that the inverter circuit, which is used for according to the pulse signal that the control module exports, Electricity output is exchanged, is powered for the liquid crystal light modulation film.
- 2. light modulation film power source special according to claim 1, it is characterised in that the concussion reduction voltage circuit includes：First Switching tube and transformer, the alternating current accesses the armature winding of the transformer after first rectifier circuit rectifies, described One end of armature winding is connected with the first end of the first switch pipe, the second end of first switch pipe ground connection, and described the 3rd end of one switching tube is connected with the control module, and the secondary windings of the transformer connects with second rectification circuit Connect, the control module is by the continual ON/OFF for controlling the first switch pipe, so as to be produced on the armature winding Waveform is exchanged, and then is the first exchange electricity output by first DC inverter.
- 3. light modulation film power source special according to claim 2, it is characterised in that the first switch pipe is N-channel MOS Pipe, the grid of the N-channel MOS pipe are connected with the control module, the source electrode ground connection of the N-channel MOS pipe, the N-channel The drain electrode of metal-oxide-semiconductor is connected with one end of the armature winding.
- 4. according to claim 1-3 any one of them light modulation film power source specials, it is characterised in that it is full-bridge to state inverter circuit Inverter circuit.
- 5. light modulation film power source special according to claim 1, it is characterised in that the inverter circuit includes：Second switch Pipe, the 3rd switching tube, the 4th switching tube and the 5th switching tube；The first end of the second switch pipe and the 3rd switching tube First end is connected with second rectification circuit, the second end of the second switch pipe respectively with the 4th switching tube One end is connected with the power end of the liquid crystal light modulation film, the second end of the 4th switching tube and the second of the 5th switching tube End connection, the first end of the 5th switching tube respectively with the second end of the 3rd switching tube and the electricity of the liquid crystal light modulation film Source connects, and the second end of the 5th switching tube is also grounded, the 3rd end of the second switch pipe, the 3rd switching tube 3rd end at the 3rd end, the 3rd end of the 4th switching tube and the 5th switching tube is connected with the control module.
- 6. light modulation film power source special according to claim 5, it is characterised in that the second switch pipe, the described 3rd open Guan Guan, the 4th switching tube and the 5th switching tube are N-channel MOS pipe, the drain of the second switch pipe and described The drain of 3rd switching tube is connected with second rectification circuit, and the source electrode of the second switch pipe is opened with the described 4th respectively The drain for closing pipe is connected with the power end of the liquid crystal light modulation film, source electrode and the 5th switching tube of the 4th switching tube Source electrode connects, the drain of the 5th switching tube respectively with the source electrode of the 3rd switching tube and the power supply of the liquid crystal light modulation film End connection, the source electrode of the 5th switching tube is also grounded, the grid of the second switch pipe, the 3rd switching tube grid, The grid of 4th switching tube and the grid of the 5th switching tube are connected with the control module.
- 7. light modulation film power source special according to claim 1, it is characterised in that first rectification circuit is bridge rectifier Circuit.
- 8. light modulation film power source special according to claim 1, it is characterised in that second rectification circuit is two pole of rectification Pipe.
- 9. light modulation film power source special according to claim 1, it is characterised in that the light modulation film power source special further includes： Wave filter, the output terminal of the inverter circuit are connected by the wave filter with the liquid crystal light modulation film.
- 10. light modulation film power source special according to claim 9, it is characterised in that the wave filter is sine wave filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810028403.5A CN108011528A (en) | 2018-01-11 | 2018-01-11 | A kind of light modulation film power source special |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810028403.5A CN108011528A (en) | 2018-01-11 | 2018-01-11 | A kind of light modulation film power source special |
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| CN108011528A true CN108011528A (en) | 2018-05-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020095065A1 (en) * | 2018-11-08 | 2020-05-14 | Cambridge Enterprise Limited | Operating circuit for lc device |
| WO2020163836A1 (en) * | 2019-02-08 | 2020-08-13 | Cardinal Ig Company | Low power driver for privacy glazing |
| WO2021203649A1 (en) * | 2020-04-07 | 2021-10-14 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal shutter, liquid crystal shutter, and led lamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872655U (en) * | 2012-07-27 | 2013-04-10 | 无锡蓝天电子有限公司 | Power adjustable power source |
| CN206272511U (en) * | 2016-12-02 | 2017-06-20 | 广州市宝太电子有限公司 | A kind of intelligent light modulation film electric power system |
-
2018
- 2018-01-11 CN CN201810028403.5A patent/CN108011528A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872655U (en) * | 2012-07-27 | 2013-04-10 | 无锡蓝天电子有限公司 | Power adjustable power source |
| CN206272511U (en) * | 2016-12-02 | 2017-06-20 | 广州市宝太电子有限公司 | A kind of intelligent light modulation film electric power system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020095065A1 (en) * | 2018-11-08 | 2020-05-14 | Cambridge Enterprise Limited | Operating circuit for lc device |
| WO2020163836A1 (en) * | 2019-02-08 | 2020-08-13 | Cardinal Ig Company | Low power driver for privacy glazing |
| US11111720B2 (en) | 2019-02-08 | 2021-09-07 | Cardinal Ig Company | Low power driver for privacy glazing |
| CN113518712A (en) * | 2019-02-08 | 2021-10-19 | 卡迪纳尔Ig公司 | Low power driver for privacy glazing |
| WO2021203649A1 (en) * | 2020-04-07 | 2021-10-14 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal shutter, liquid crystal shutter, and led lamp |
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