CN110120204A - Driving method of power supply driving module, power supply driving module and display device - Google Patents
Driving method of power supply driving module, power supply driving module and display device Download PDFInfo
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- CN110120204A CN110120204A CN201910271004.6A CN201910271004A CN110120204A CN 110120204 A CN110120204 A CN 110120204A CN 201910271004 A CN201910271004 A CN 201910271004A CN 110120204 A CN110120204 A CN 110120204A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005070 sampling Methods 0.000 claims description 32
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 28
- 238000012512 characterization method Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
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- 230000001755 vocal effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Dc-Dc Converters (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses a driving method of a power driving module, the power driving module and a display device. The driving method is to obtain load information; judging the load information, and if the load becomes large, controlling the switching frequency of a switching module of the power supply driving module to be increased, and improving the power supply output of the power supply driving module; when the load becomes smaller, the switching frequency of the switch module of the power driving module is controlled to be reduced, and the power output of the power driving module is reduced. When the rear-end load of the power supply driving module becomes large, the switching frequency of the switching module is improved through control, so that the response to the rear-end load is faster, the power supply can quickly compensate the voltage level back through recharging, and the voltage ripple is reduced; when the rear-end load of the power circuit is reduced, the switching frequency of the switching module is reduced through control, so that the voltage of the rear-end load is reduced, the power loss of the rear-end load is reduced, and the electromagnetic radiation of the power driving module is reduced along with the reduction of the power.
Description
Technical field
This application involves field of display technology more particularly to a kind of driving methods of power drives mould group, power drives mould
Group and display device.
Background technique
The display devices such as liquid crystal display have the characteristics that external form is frivolous, power consumption lacks the radiationless pollution of level-one in recent years,
It has been widely used on the portable informations products such as laptop, personal digital assistant (PDA), wherein power drives
Mould group provides power supply for devices such as the display panels of display device, is that display device works normally an indispensable important ring.
The power consumption of the load of power drives mould group is bigger, and the power supply of power drives mould group exports more unstable, ripple
(ripple) bigger, the display in this way to the use of power circuit, or even including rear end can all bring adverse effect, it would be highly desirable to solve
Certainly.
Summary of the invention
The purpose of the application is to provide driving method, power drives mould group and the display device of a kind of power drives mould group,
To improve the stability of power drives mould group output.
This application discloses a kind of driving method of power drives mould group, the driving method the following steps are included:
Obtain load information；
Load information is judged, if load becomes larger, controls the switching frequency of the switch module of power drives mould group
It improves, improves the power supply output of power drives mould group；When load becomes smaller, the switch frequency of the switch module of power drives mould group is controlled
Rate reduces, and reduces the power supply output of power drives mould group.
Optionally, described to judge load information, if load becomes larger, the switching frequency of control switch module is mentioned
Height improves the power supply output of power drives mould group；When load becomes smaller, the switching frequency of control switch module is reduced, and reduces power supply
The step of driving the power supply output of mould group, comprising:
Load information is obtained, oscillator signal is generated, if load becomes larger, the frequency for controlling oscillator signal is improved；If load becomes
It is small, control the frequencies go lower of oscillator signal；
According to the oscillator signal, the switch control signal of switch module is generated, control switch module is turned on or off, and adjusts
The power supply of whole electric power driving module exports.
Optionally, oscillator signal is generated according to the acquisition load information described, if load becomes larger, control oscillation letter
Number frequency improve；If load becomes smaller, the oscillator signal in the frequencies go lower step of oscillator signal is controlled, switch module is generated
Before the step of switch control signal, control switch module are turned on or off, and adjust the power supply output of electric power driving module, comprising:
Load information is obtained, load characterization signal is generated according to load information；
Wherein, according to the oscillator signal, the switch control signal of switch module is generated, control switch module leads on-off
In the step of opening, adjusting the power supply output of electric power driving module；
The switch control signal of switch module is generated compared with the oscillator signal according to the load characterization signal；It is described
Switch control signal control switch module is turned on or off, to improve the power supply output of power drives mould group or reduce power drives
The power supply of mould group exports.
Optionally, the acquisition load information, generating the step of load characterizes signal according to load information includes:
Obtain load voltage information；
Judge whether load voltage information is greater than a predetermined voltage threshold, if more than predetermined voltage threshold, export low level
Information；If being less than predetermined voltage threshold, high level information is exported.
Optionally, the acquisition load information generates oscillator signal, if load becomes larger, the frequency for controlling oscillator signal is mentioned
It is high；If the step of load becomes smaller, controls the frequencies go lower of oscillator signal includes:
Detect load information；
Frequency control signal is generated according to different load informations, if load becomes larger, generates high-frequency frequency control
Signal；If load becomes smaller, low-frequency frequency control signal is generated；Frequency control signal is sent to oscillator signal and generates mould
Block；
Oscillator signal generation module generates and the frequency control signal identical frequency according to the frequency control signal
Oscillator signal.
Optionally, the driving method includes:
The switch control signal of switch module is generated, if load characterization signal is greater than with the oscillator signal, exports high electricity
Ordinary mail breath, control switch module conducting, to improve the power supply output of power module, to improve the power of load circuit；If load
Characterization signal is less than with the oscillator signal, exports low level, and control switch disconnects, and reduces the power supply output of power module, with
Reduce the power of load circuit.
Disclosed herein as well is a kind of power drives mould group, the power drives mould group includes: power supply, switch module, fills
Discharge module, switching frequency control module；Wherein, the charge-discharge modules are connect with the power supply；The switch module control
Electric power source pair of module charge-discharge modules processed carry out charge and discharge；The first load sampling module obtains the negative of the power drives mould group
Carry the load information of output end；The switching frequency control module is carried out according to the load information that the first load sampling module obtains
Judgement, if the load of load outputs becomes larger, the switching frequency of switching frequency control module control switch module is improved, and is improved
The charge and discharge electric frequency of the charge-discharge modules；If the load of load outputs becomes smaller, the switching frequency of control switch module subtracts
It is low, reduce the charge and discharge electric frequency of the charge-discharge modules.
Optionally, the switching frequency control module includes: frequency regulation block, and the frequency regulation block is according to
The load information that first load sampling module obtains generates frequency control signal, if load becomes larger, the frequency control generated is believed
Number frequency get higher；If load becomes smaller, the frequency of the frequency control signal generated is lower；Switching signal generation module,
The frequency control signal that the switching signal generation module is generated according to the frequency regulation block, generates the switch module
Switch control signal, the frequency of the switch control signal is consistent with the frequency of the frequency control signal, the switch module
It is turned on or off according to the switch control signal.
Optionally, the power drives mould group further includes；Second load sampling module, the second load sampling module
It is connect with switching signal generation module, the second load sampling module includes: division module, the division module connection and institute
The load outputs of power drives mould group are stated, a branch pressure voltage is exported；And second comparison module, second comparison module obtain
It obtains the branch pressure voltage of division module and is calculated with a preset reference voltage, output loading characterizes signal and believes to the switch
Number generation module；
Wherein, the switching signal generation module includes: oscillator signal generation module, the oscillator signal generation module root
Oscillator signal is generated according to the frequency control signal that the frequency regulation block generates；And first comparison module, first ratio
Compared with the oscillator signal that module receives the oscillator signal generation module, and according to the second load sampling module output
Load characterization signal generates the switch control signal.
Disclosed herein as well is a kind of display device, the display device includes a kind of power supply described in above-mentioned any one
Drive mould group, and the display panel powered by the power drives mould group.
When the backend load of power drives mould group becomes larger, the switch module of power drives mould group is improved by control
Switching frequency, so that faster to the response of backend load, even if the electric current of the load consumption of output end is very big, changed power fluctuation
Greatly, power supply can also quickly be returned voltage quasi position compensation by charging again, reduce the ripple (ripple) of voltage；Work as electricity
When the backend load of source circuit becomes smaller, excessively rapid compensation, which seems, just not to be made much sense, and passing through control reduces power drives
The switching frequency of the switch module of mould group, under the premise of meeting circuit to ripple (ripple) requirement, so that backend load
Voltage become smaller so that the lower power consumption of backend load, and the electromagnetic radiation of power drives mould group also can be with function
The reduction of rate and reduce.
Detailed description of the invention
Included attached drawing is used to provide that a further understanding of the embodiments of the present application, and which constitute one of specification
Point, for illustrating presently filed embodiment, and with verbal description come together to illustrate the principle of the application.Under it should be evident that
Attached drawing in the description of face is only some embodiments of the present application, for those of ordinary skill in the art, is not paying wound
Under the premise of the property made is laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of display device of the embodiment of the application；
Fig. 2 is a kind of schematic diagram of power drives mould group of the embodiment of the application；
Fig. 3 is a kind of circuit diagram of power drives mould group of the embodiment of the application；
Fig. 4 is the switch control signal schematic diagram of power drives mould group shown in Fig. 3；
Fig. 5 is a kind of schematic diagram of power drives mould group of another embodiment of the application；
Fig. 6 is the switch control signal schematic diagram of power drives mould group shown in fig. 5；
Fig. 7 is the ripple voltage schematic diagram of one embodiment of the application；
Fig. 8 is the schematic diagram of the driving method of the power drives mould group of the embodiment of the application；
Fig. 9 is the driving method schematic diagram of the power drives mould group of another embodiment of the application.
Wherein, 1, display device；10, power drives mould group；11, power supply；12, charge-discharge modules；13, switch module；14,
First load sampling module；15, switching frequency control module；151, frequency regulation block；152, switching signal generation module；
1521, oscillator signal generation module；1522, the first comparison module；16, the second load sampling module；161, division module；162,
Second comparison module；20, display panel.
Specific embodiment
It is to be appreciated that term used herein above, disclosed specific structure and function details, it is only for description
Specific embodiment is representative, but the application can be implemented by many alternative forms, be not construed as only
It is limited to the embodiments set forth herein.
In the description of the present application, term " first ", " second " are used for description purposes only, and it is opposite to should not be understood as instruction
Importance, or implicitly indicate the quantity of indicated technical characteristic.As a result, unless otherwise indicated, " first ", " are defined
Two " feature can explicitly or implicitly include one or more of the features；The meaning of " plurality " is two or two
More than.Term " includes " and its any deformation, mean and non-exclusive include, it is understood that there may be or addition is one or more that other are special
Sign, integer, step, operation, unit, component and/or combination thereof.
In addition, "center", " transverse direction ", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The term of the orientation or positional relationship of the instructions such as "outside" is that orientation or relative positional relationship based on the figure describe, only
Be that the application simplifies description for ease of description, rather than indicate signified device or element must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
Furthermore unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, example
Such as it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, it can also indirectly connected through an intermediary or the connection inside two elements.For ability
For the those of ordinary skill in domain, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
Below with reference to the accompanying drawings it elaborates with optional embodiment to the application.
As shown in Figure 1, this application discloses a kind of display device 1, including a kind of power drives mould group 10, and by described
The display panel 20 that power drives mould group 10 is powered.
As shown in Figures 2 and 3, Fig. 2 and Fig. 3 is the actual circuit block diagram and abstract block diagram of power drives mould group 10 respectively,
The power drives mould group 10 includes: power supply 11, charge-discharge modules 12, load outputs, switch module 13 and switching frequency
Control module 15；Wherein, the power supply 11 is connect with the charge-discharge modules 12；The one load electricity of load outputs output
Pressure；The switch module 13 controls 11 module of power supply and carries out charge and discharge to charge-discharge modules 12；The first load sampling module
14 obtain the load information of load outputs；The switching frequency control module 15 is obtained according to the first load sampling module 14
Load information is judged, if the load of load outputs becomes larger, 15 control switch module 13 of switching frequency control module
Switching frequency improves, and improves the charge and discharge electric frequency of the charge-discharge modules 12；If the load of load outputs becomes smaller, control is opened
The switching frequency for closing module 13 lowers, and reduces the charge and discharge electric frequency of the charge-discharge modules 12.
Specifically, the charge-discharge modules 12 of the power drives mould group 10 can include: inductance L interconnected, diode
D, electric capacity of voltage regulation C；The diode D is arranged between the inductance L and the electric capacity of voltage regulation C, the inductance L, diode D,
Electric capacity of voltage regulation C is arranged between the positive and negative anodes of the power supply 11, and the switch module 13 is in parallel with the electric capacity of voltage regulation C, described
Diode D is in the positive outbound course one-way conduction of power supply 11.In the switching of 11 circuital current of power supply, the low-resistance of capacitor C in parallel
The anti-load for being shorted high impedance, fast-changing electric current required for being provided for 11 circuit of power supply.Load maintains stable shape
State and at a slow speed electric current required for variation, and constantly charge is supplemented to capacitor C.Certainly, this will not cause 11 equipment of power supply and electricity
Flow point is routed the curent change of upper high speed.The setting of capacitor C reduces the curent change on power supply 11, and power supply 11 is distributed
The induced voltage of inductance L accordingly just reduces on line, reduces the voltage noise on power supply 11, realizes pressure stabilizing.
The power supply 11 can be DC power supply, and the switching frequency control module 15 includes frequency regulation block 151 and opens
OFF signal generation module 152, wherein the frequency regulation block 151 is negative according to being obtained according to the first load sampling module 14
Information carrying breath generates frequency control signal, if load becomes larger, the frequency of the frequency control signal generated is got higher；If load becomes
Small, then the frequency of the frequency control signal generated is lower, and will be sent to switching signal generation module 152；The switch letter
The frequency control signal that number generation module 152 is generated according to frequency regulation block 151 generates the switch control of switch module 13
Signal processed, the frequency of the switch control signal is consistent with the frequency of the frequency control signal, 13 basis of switch module
The switch control signal is turned on or off.
The power drives mould group 10 further includes the second load sampling module 16, the second load sampling module 16 and institute
State the connection of switching signal generation module 152.The second load sampling module 16 includes division module 161 and the second comparison module
162, wherein the connection of division module 161 and the load outputs export a branch pressure voltage；Second comparison module
The branch pressure voltage of 162 acquisition division modules 161 is simultaneously calculated with a preset reference voltage Vref, and output loading characterizes signal
To the switching signal generation module 152.Preset reference voltage Vref can be according to the fluctuation range of load according to practical need
It is configured.Second comparison module 162 can be used comparator U1 and seek difference to load signal and reference voltage to realize
Load characterization signal is obtained, certain those skilled in the art can also select other acquisition modes according to the demand of itself.
Division module 161 can be set to concatenated two divider resistances R1 and R2, adopt between divider resistance R1 and R2
Collect branch pressure voltage FB, branch pressure voltage FB is output to the second comparison module 162 (as selected comparator U2), and partial pressure obtains in this way
Electric current is smaller, and the branch pressure voltage FB of acquisition is smaller, the relatively low voltage that reference voltage preset in this way can be arranged,
Play the role of lowering power drives mould group power consumption in this way, in addition, one relatively low voltage of setting, setting method are simply easy
Row strong operability.
The switching signal generation module 152 includes oscillator signal generation module and the first comparison module 1522, the vibration
It swings signal generation module and oscillator signal is generated according to the frequency control signal that frequency regulation block 151 generates；Described first compares
Module 1522 receives the oscillator signal of oscillator signal generation module, and the load exported according to the second load sampling module 16
It characterizes signal and generates switch control signal.It is of course also possible to be not provided with the second load sampling module 16, its other party can be passed through
Formula directly acquires load information, such as first comparison module 1522 is directly connected in the load outputs of power supply 11, can be with
Voltage between direct basis inductance L and diode D can be negative with above-mentioned first as load information or even the load information
It is the same to carry the load information voltage that sampling module 14 is sampled, or is ok in a linear ratio relation, as long as described first is negative
It carries sampling module 14 and second and loads the voltage feelings that sampling module 16 can reflect the load outputs of the power drives mould group 10
Condition.
Specifically, power drives mould group 10 described herein includes: DC power supply and is serially connected with reference to Figure 4 and 5
Inductance L, diode D and electric capacity of voltage regulation C, the electric capacity of voltage regulation C be connected in parallel on the load outputs of the power drives mould group 10,
The diode D forward direction is connected between the anode and load outputs of the DC power supply 11；The inductance L, diode D with
And capacitor C constitutes a charge-discharge modules；The power drives mould group 10 further include a N-type mos pipe Q as switch module and
One switching frequency control module；The switching frequency control module control connects the control terminal of the N-type mos pipe Q；The N-type
Mos pipe Q is connected to the load outputs of the power drives mould group 10, specifically, the input terminal coupling of the N type mos pipe Q
It connects between the inductance LL and diode DD；Output end is couple to ground terminal, and the N-type mos pipe Q is in parallel with the capacitor C,
By controlling the conducting and shutdown of N-type mos pipe Q, it can control the charge and discharge of the charge-discharge modules 12, control the power supply and drive
The output of dynamic model group 10.
The power drives mould group 10 further includes one second load sampling module, specifically, including: resistance R1 and resistance
R2 and one second comparator U2；The resistance R1 and resistance R2 are series between load outputs and ground terminal, resistance R1 with
Resistance R2 constitutes a division module, and the division module to load output point by dividing to obtain branch pressure voltage FB；Described point
Piezoelectricity pressure is output to the negative input end of the comparator U2, and the positive input terminal of the comparator U2 inputs a reference voltage Vref,
For the branch pressure voltage FB with the reference voltage Vref after compared with comparator U2, comparator U2 output loading characterizes signal
U2out=Vref-FB.
The power drives mould group 10 further includes a sampling resistor R ', and sampling resistor R ' is series at the output of N-type mos pipe Q
Between end and ground terminal；The switching frequency control module includes voltage controlled oscillator VCO, triangular wave oscillator OSC and first
Comparator U1, the voltage controlled oscillator VCO are coupled to the sampling resistor R ' and the N-type mos as frequency regulation block
Between the output end of pipe Q；The triangular wave oscillator OSC is coupled to the voltage controlled oscillator VCO and the first comparator U1
Negative input end between；The positive input terminal of the first comparator U1 accesses the output loading table of the second load sampling module
Reference U2out；The output end control of the first comparator U1 is connected to the N-type mos pipe Q control terminal.
Work as N-type since N-type mos pipe Q access is between the load outputs of the power drives mould group 10 in conjunction with Fig. 4
When mos pipe Q is connected, the voltage controlled oscillator VCO obtains load information V ' between sampling resistor R ' and N-type mos pipe Q, generates
Frequency control signal is sent to triangular wave oscillator OSC, and the triangular wave oscillator OSC generates the triangular wave letter of respective frequencies
Number；The load that the positive input terminal of the comparator U1 receives comparator U2 output characterizes signal, negative input end triangular wave oscillator
The triangular signal of OSC input, ask difference relatively after, output end output switch control signal controls the conducting of N-type mos pipe Q
Or it closes.Wherein, if triangular signal is greater than the load and characterizes signal, the switch control signal generated is low level；If
Triangular signal is less than the load and characterizes signal, then the switch control signal generated is high level；Its switch control exported
Signal is a square-wave signal.
If the frequency regulation block 151 is not provided with, as shown in figure 5, the triangular wave oscillator OSC is straight in conjunction with Fig. 6
Triangular wave oscillation signal is delivered a child into, the load that the positive input terminal of the comparator U1 receives comparator U2 output characterizes signal, bears
The triangular signal of input terminal triangular wave oscillator OSC input, comparator U1 can also generate switch control signal, although opposite
The load of power drives mould group becomes larger, and the turn-on time that switch control signal caused by comparator U1 controls N-type mos pipe Q becomes
Short, the time of disconnection is elongated, but the frequency cycle Ts of switch control module is certain.
It is corresponding, after being provided with frequency regulation block 151, as shown in fig. 7, the backend load when power drives mould group becomes
When big, the switching frequency of switch module is improved by control, so that faster to the response of backend load, even if output end is negative
The electric current for carrying consumption is very big, and changed power fluctuation is big, and voltage quasi position compensation can also be returned by charging again quickly, reduced
The ripple of voltage (ripple)；When power drives mould group backend load becomes smaller, excessively rapidly compensation seems just without too
Big meaning reduces the switching frequency of switch module by control, is meeting power drives mould group to ripple (ripple) requirement
Under the premise of, so that the voltage of backend load becomes smaller, so that the lower power consumption of backend load, and power drives mould group
Electromagnetic radiation can also be reduced with the reduction of power.
It is corresponding, as shown in figure 8, Fig. 8 is a kind of schematic diagram of the driving method of power drives mould group of the application, the application
A kind of driving method for driving mould group is also disclosed, the driving method includes:
A: load information is obtained；
B: judging load information, if load becomes larger, the switching frequency of control switch module is improved, and improves power supply
Drive the output of mould group；When load becomes smaller, the switching frequency of control switch module is reduced, and reduces the output of power drives mould group.
With reference to Fig. 9, switch control signal can be generated by oscillator signal in the step B, specifically included:
B1: obtaining load information, generates oscillator signal, if load becomes larger, the frequency for controlling oscillator signal is improved；If load
Become smaller, controls the frequencies go lower of oscillator signal；
B2: according to the oscillator signal in step B1, the switch control signal of switch module, the conducting of control switch module are generated
Or disconnect, adjust the power supply output frequency of electric power driving module.
By obtaining load information, oscillator signal is generated, if load becomes larger, the frequency for controlling oscillator signal is improved；If negative
Load becomes smaller, and controls the frequencies go lower of oscillator signal；According to oscillator signal, the switch control signal of switch module is generated, control is opened
It closes module to be turned on or off, adjusts the power supply output frequency of electric power driving module, the case where load is become larger or is become smaller, power supply electricity
Road can the variation quickly to lucky star son respond, avoid when load becomes larger and the excessive situation of ripple caused to occur.
So that the voltage of backend load becomes smaller, so that the lower power consumption of backend load, and the electromagnetic radiation of power circuit
It can be reduced with the reduction of power.
Further include step M before the step B2: obtaining load information, load characterization signal is generated according to load information；
Wherein, in B2 step: according to the load characterization signal in step M and the oscillator signal in step B1, to the load table
Reference number is compared with the oscillator signal, generates the switch control signal of switch module；The switch control signal control
Switch module is turned on or off, to improve the power supply output of power drives mould group or reduce the power supply output of power drives mould group.
Load characterization signal directly energy reaction load size variation situation, is compared with load characterization signal and oscillator signal
The switch control signal of switch module, can directly generate to the accurate relevant switch control signal of load information, such as Fig. 4 or figure
Shown in 6, the frequency of the switch control signal of generation and the frequency of oscillator signal are consistent, the opening of the switch control signal of generation or
Turn-off time is also related to load information.Switch control signal control switch module is switched on or off, and ensure that power supply drives
The more stable work of dynamic model group.Oscillator signal can be triangular wave or sine wave, when being also possible to other waveforms.
Specifically, the step M the following steps are included:
M1: load voltage information is obtained；
M2: judging whether load voltage information is greater than a predetermined voltage threshold, if more than predetermined voltage threshold, export low
Level information；If being less than predetermined voltage threshold, high level information is exported.
It should be noted that the step M and step B1 and there is no one it is fixed execute sequence, step B1 can be
It first carries out, is also possible in rear execution；Similarly, step M can be what is first carried out, be also possible in rear execution；Very
It is also possible to be performed simultaneously to step M and step B1.
Specifically, the step B1 the following steps are included:
B11: within the period of a switch module, load information is detected when switch module is opened；
B12: the load in obtaining step M characterizes signal, generates frequency control signal according to different load characterization signals,
If the load that load characterization signal embodies becomes larger, high-frequency frequency control signal is generated；If load characterization signal embodies
Load becomes smaller, then generates low-frequency periodic signal, and at the period of next switch module, the frequency of different frequency is controlled
Signal is sent to oscillator signal generation module；
B13: oscillator signal generation module receives then to generate the oscillator signal with frequency control signal identical frequency.
It is corresponding, in the step B2, after the switch control signal of generation, if pair load characterization signal and oscillation letter
It number is compared: if load characterization signal is greater than the oscillator signal, exporting high level information, the conducting of control switch module, with
The power supply output of power module is improved, to improve the power of load circuit；If load characterization signal is less than the oscillator signal, defeated
Low level out, control switch disconnect, and the power supply output of power module are reduced, to reduce the power of load circuit.It is corresponding, it is described
Switch control signal be a square-wave signal, frequency changes with the variation of payload size.
It should be noted that the restriction for each step being related in this programme, in the premise for not influencing concrete scheme implementation
Under, it does not regard as being can be the step of making restriction to step sequencing, write on front what is first carried out, be also possible to
It executes, is possibly even performed simultaneously afterwards, as long as this programme can be implemented, all shall be regarded as belonging to the protection model of the application
It encloses.
The technical solution of the application can be widely applied to various display panels, as TN (Twisted Nematic, distort to
Column type) display panel, IPS (In-Plane Switching, plane conversion type) display panel, VA (Vertical
Alignment, vertical orientation type) display panel, (Multi-Domain Vertical Alignment, more quadrants are vertical by MVA
Alignment-type) display panel, it is of course also possible to be other kinds of display panel, such as OLED (Organic Light-
Emitting Diode, Organic Light Emitting Diode D) display panel, applicable above scheme.
The above content is combine specific optional embodiment to made by the application further description, and it cannot be said that
The specific implementation of the application is only limited to these instructions.For those of ordinary skill in the art to which this application belongs, exist
Under the premise of not departing from the application design, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the application's
Protection scope.
Claims (10)
1. a kind of driving method of power drives mould group, which is characterized in that the driving method includes:
Obtain load information；
Load information is judged, if load becomes larger, the switching frequency for controlling the switch module of power drives mould group is improved,
Improve the power supply output of power drives mould group；When load becomes smaller, the switching frequency drop of the switch module of power drives mould group is controlled
It is low, reduce the power supply output of power drives mould group.
2. a kind of driving method of power drives mould group according to claim 1, which is characterized in that described to load information
Judged, if load becomes larger, the switching frequency of control switch module is improved, and improves the power supply output of power drives mould group；
The step of when load becomes smaller, the switching frequency of control switch module is reduced, and reduces the power supply output of power drives mould group, comprising:
Load information is obtained, oscillator signal is generated, if load becomes larger, the frequency for controlling oscillator signal is improved；If load becomes smaller, control
The frequencies go lower of oscillator signal processed；
According to the oscillator signal, the switch control signal of switch module is generated, control switch module is turned on or off, adjustment electricity
The power supply of source drive module exports.
3. a kind of driving method of power drives mould group according to claim 2, which is characterized in that described according to
Load information is obtained, oscillator signal is generated, if load becomes larger, the frequency for controlling oscillator signal is improved；If load becomes smaller, control vibration
The oscillator signal in the frequencies go lower step of signal is swung, the switch control signal of switch module, the conducting of control switch module are generated
Or before the step of disconnecting, adjusting the power supply output of electric power driving module, comprising:
Load information is obtained, load characterization signal is generated according to load information；
Wherein, according to the oscillator signal, the switch control signal of switch module is generated, control switch module is turned on or off,
In the step of adjusting the power supply output of electric power driving module；
The switch control signal of switch module is generated compared with the oscillator signal according to the load characterization signal；The switch
Control Signal-controlled switch module is turned on or off, to improve the power supply output of power drives mould group or reduce power drives mould group
Power supply output.
4. a kind of driving method of power drives mould group according to claim 3, which is characterized in that the acquisition load letter
Breath, generating the step of load characterizes signal according to load information includes:
Obtain load voltage information；
Judge whether load voltage information is greater than a predetermined voltage threshold, if more than predetermined voltage threshold, exports low level information；
If being less than predetermined voltage threshold, high level information is exported.
5. a kind of driving method of power drives mould group according to claim 3, which is characterized in that the acquisition load letter
Breath generates oscillator signal, if load becomes larger, the frequency for controlling oscillator signal is improved；If load becomes smaller, the frequency of oscillator signal is controlled
The step of rate is lower include:
Detect load information；
Frequency control signal is generated according to different load informations, if load becomes larger, generates high-frequency frequency control signal；
If load becomes smaller, low-frequency frequency control signal is generated；Frequency control signal is sent to oscillator signal generation module；
Oscillator signal generation module generates the oscillation with the frequency control signal identical frequency according to the frequency control signal
Signal.
6. a kind of driving method of power drives mould group according to claim 1, which is characterized in that the driving method packet
It includes:
The switch control signal of switch module is generated, if load characterization signal is greater than with the oscillator signal, output high level letter
Breath, control switch module conducting, to improve the power supply output of power module, to improve the power of load circuit；If load characterization
Signal is less than with the oscillator signal, exports low level, and control switch disconnects, and the power supply output of power module is reduced, to reduce
The power of load circuit.
7. a kind of power drives mould group, which is characterized in that the power drives mould group includes:
Power supply；
Charge-discharge modules are connect with the power supply；
Switch module, the switch module control power supply carry out charge and discharge to charge-discharge modules；
First load sampling module, obtains the load information of the load outputs of the power drives mould group；And
Switching frequency control module is judged according to the load information that the first load sampling module obtains, if load outputs
Load when becoming larger, the switching frequency of control switch module improves, and improves the charge and discharge electric frequency of the charge-discharge modules；If load
When the load of output end becomes smaller, the switching frequency of control switch module lowers, and reduces the charge and discharge electric frequency of the charge-discharge modules.
8. a kind of power drives mould group according to claim 7, which is characterized in that the switching frequency control module packet
It includes:
Frequency regulation block generates frequency control signal according to the load information that the first load sampling module obtains, if negative
Load becomes larger, then the frequency of the frequency control signal generated is got higher；If load becomes smaller, the frequency of the frequency control signal generated
Be lower；
Switching signal generation module generates the switch module according to the frequency control signal that the frequency regulation block generates
Switch control signal, the frequency of the switch control signal is consistent with the frequency of the frequency control signal, the switching molding
Root tuber is turned on or off according to the switch control signal.
9. a kind of power drives mould group according to claim 7, which is characterized in that the power drives mould group further includes；
Second load sampling module, connect with the switching signal generation module, and the second load sampling module includes:
Division module, the load outputs of connection and the power drives mould group export a branch pressure voltage；And
Second comparison module obtains the branch pressure voltage of the division module and is calculated with a preset reference voltage, output
Load characterization signal gives the switching signal generation module；
Wherein, the switching signal generation module includes:
Oscillator signal generation module generates oscillator signal according to the frequency control signal that the frequency regulation block generates；And
First comparison module receives the oscillator signal of the oscillator signal generation module, and according to the second load sampling mould
The load characterization signal of block output generates the switch control signal.
10. a kind of display device, which is characterized in that the display device includes one as described in claim 7-9 any one
Kind power drives mould group, and the display panel powered by the power drives mould group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271004.6A CN110120204B (en) | 2019-04-04 | 2019-04-04 | Driving method of power supply driving module, power supply driving module and display device |
| PCT/CN2020/081351 WO2020200027A1 (en) | 2019-04-04 | 2020-03-26 | Driving method for power supply drive circuit, power supply drive circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271004.6A CN110120204B (en) | 2019-04-04 | 2019-04-04 | Driving method of power supply driving module, power supply driving module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110120204A true CN110120204A (en) | 2019-08-13 |
| CN110120204B CN110120204B (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910271004.6A Active CN110120204B (en) | 2019-04-04 | 2019-04-04 | Driving method of power supply driving module, power supply driving module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110120204B (en) |
| WO (1) | WO2020200027A1 (en) |
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| CN115394257A (en) * | 2021-05-25 | 2022-11-25 | 广州视源电子科技股份有限公司 | Method and system for controlling output ripple, computer device and storage medium |
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| WO2020200027A1 (en) | 2020-10-08 |
| CN110120204B (en) | 2020-12-25 |
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