CN106505860A - A kind of output control method, output control system and liquid crystal display - Google Patents
A kind of output control method, output control system and liquid crystal display Download PDFInfo
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- CN106505860A CN106505860A CN201610969041.0A CN201610969041A CN106505860A CN 106505860 A CN106505860 A CN 106505860A CN 201610969041 A CN201610969041 A CN 201610969041A CN 106505860 A CN106505860 A CN 106505860A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 13
- 230000000052 comparative effect Effects 0.000 claims abstract description 74
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- 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
- H02M3/158—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 including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of output control method, is applied in PWM controller, and the output control method includes obtaining output voltage；The output voltage is compared with first and second threshold voltage, and exports comparative result, wherein described first threshold voltage is more than the second threshold voltage；According to the pwm signal that the comparative result exports corresponding dutycycle, wherein, the pwm signal of output makes the ON time of switching tube identical.Therefore, the present invention can adjust the dutycycle of output pwm signal according to comparative result, so as to reduce power consumption, and the pwm signal for exporting makes the ON time of switching tube identical, to guarantee to adjust dutycycle in any case, the time of the pwm signal controlling switch pipe conducting of output is constant, not affect normal work.The present invention also provides a kind of output control system and liquid crystal display.
Description
Technical field
The present invention relates to a kind of display technology field, drives output control method, output control system more particularly, to a kind of
And liquid crystal display.
Background technology
In the epoch for needing power management and save energy, reducing, electrical source consumption of power supply when standby is more and more important
?.In some electronic equipments such as television set, flyback sourse still needs to consumption electric power in standby period some of which components and parts, from
And waste the energy.
Content of the invention
It is an object of the invention to provide a kind of output control method, for reducing work(of the electronic equipment in standby period
Consumption, save energy.
Another object of the present invention is to providing a kind of output control system and liquid crystal display.
To achieve these goals, embodiment of the present invention provides following technical scheme：
The present invention provides a kind of output control method, is applied in PWM controller, and the output control method includes：
Obtain output voltage；
The output voltage is compared with first and second threshold voltage, and exports comparative result, wherein described
One threshold voltage is more than the second threshold voltage；
According to the pwm signal that the comparative result exports corresponding dutycycle, wherein, the pwm signal of output makes switching tube
ON time identical.
Wherein, the output voltage is compared with first and second threshold voltage, and exports comparative result includes：
When the output voltage is more than first threshold voltage, the first comparative result is exported；
When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；
When the output voltage is less than second threshold voltage, the 3rd comparative result is exported.
Wherein, the pwm signal for exporting corresponding dutycycle according to the comparative result includes：
First to the 3rd pwm signal, the wherein first to the 3rd pwm signal are exported according to the described first to the 3rd comparative result
Dutycycle be respectively the first to the 3rd dutycycle, first dutycycle is more than the 3rd dutycycle, and the 3rd dutycycle is big
In the second dutycycle.
The present invention also provides a kind of output control system, is applied in PWM controller, and the output control system includes obtaining
Unit, comparing unit and control unit is taken, the acquiring unit is used for obtaining output voltage；The comparing unit is used for will be described
Output voltage is compared with first and second threshold voltage, and exports comparative result, and wherein described first threshold voltage is more than
The second threshold voltage；Described control unit is used for the pwm signal for exporting corresponding dutycycle according to the comparative result, its
In, the pwm signal of output makes the ON time of switching tube identical.
Wherein, the comparing unit is used for when the output voltage is more than first threshold voltage, and knot is compared in output first
Really；When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；Described
When output voltage is less than second threshold voltage, the 3rd comparative result is exported.
Wherein, described control unit is used for exporting the first to the 3rd pwm signal according to the described first to the 3rd comparative result,
The dutycycle of the wherein first to the 3rd pwm signal is respectively the first to the 3rd dutycycle, and first dutycycle is accounted for more than the 3rd
Empty ratio, the 3rd dutycycle are more than the second dutycycle.
The present invention also provides the switching tube that a kind of liquid crystal display is included PWM controller and is connected with PMW controllers, described
PWM controller includes output control system, and the output control system includes acquiring unit, comparing unit and control unit, institute
Stating acquiring unit is used for obtaining output voltage；The comparing unit is used for the output voltage and first and second threshold voltage
It is compared, and exports comparative result, wherein described first threshold voltage is more than the second threshold voltage；Described control unit
For exporting the pwm signal of corresponding dutycycle according to the comparative result, wherein, the pwm signal of output makes leading for switching tube
The logical time is identical.
Wherein, the comparing unit is used for when the output voltage is more than first threshold voltage, and knot is compared in output first
Really；When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；Described
When output voltage is less than second threshold voltage, the 3rd comparative result is exported.
Wherein, described control unit is used for exporting the first to the 3rd pwm signal according to the described first to the 3rd comparative result,
The dutycycle of the wherein first to the 3rd pwm signal is respectively the first to the 3rd dutycycle, and first dutycycle is accounted for more than the 3rd
Empty ratio, the 3rd dutycycle are more than the second dutycycle.
The present invention provides a kind of liquid crystal display, including above-mentioned array base palte.
The embodiment of the present invention has the advantage that or beneficial effect：
A kind of output control method of the present invention, is applied in PWM controller, and the output control method includes obtaining defeated
Go out voltage；The output voltage is compared with first and second threshold voltage, and exports comparative result, wherein described first
Threshold voltage is more than the second threshold voltage；According to the pwm signal that the comparative result exports corresponding dutycycle, wherein,
The pwm signal of output makes the ON time of switching tube identical.Therefore, the present invention can be according to comparative result adjustment output PWM letters
Number dutycycle, so as to reduce power consumption, and the pwm signal for exporting makes the ON time of switching tube identical, to guarantee in any case
Adjustment dutycycle, the time of the pwm signal controlling switch pipe conducting of output are constant, not affect normal work.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of output control method that first aspect of the present invention embodiment is provided.
Fig. 2 is a kind of block diagram of output control that second aspect of the present invention embodiment is provided.
Fig. 3 is a kind of block diagram of liquid crystal display that third aspect of the present invention embodiment is provided.
Specific embodiment
Accompanying drawing in below in conjunction with the embodiment of the present invention, to the embodiment of the present invention in technical scheme carry out clear, complete
Site preparation is described, it is clear that described embodiment a part of embodiment only of the invention, rather than whole embodiments.Base
Embodiment in the present invention, it is all that those of ordinary skill in the art are obtained on the premise of creative work is not made
Other embodiments, belong to the scope of protection of the invention.
Additionally, the explanation of following embodiment is with reference to additional diagram, the spy for implementing is may be used in order to illustrate the present invention
Determine embodiment.The direction term being previously mentioned in the present invention, for example, " on ", D score, "front", "rear", "left", "right", " interior ",
" outward ", " side " etc., is only the direction with reference to annexed drawings, and therefore, the direction term that uses is to more preferably, more clearly say
Bright and understand the present invention, rather than indicate or infer the device or element of indication and must have specific orientation, with specific side
Position construction and operation, are therefore not considered as limiting the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or detachably connected, or integratedly connect
Connect；Can be mechanically connected；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion.For the ordinary skill in the art, above-mentioned term tool in the present invention can be understood with concrete condition
Body implication.
Additionally, in describing the invention, unless otherwise stated, " multiple " are meant that two or more.If this
Occur the term of " operation " in specification, which refers not only to independent operation, when clearly distinguishing with other operations, as long as
Can realize that the effect desired by the operation is then also included within this term.In addition, the numerical value model represented with "～" in this specification
Enclose the scope for referring to that the numerical value that records before and after "～" is included as minimum of a value and maximum.In the accompanying drawings, structure
Similar or identical is indicated by the same numeral.
Fig. 1 is referred to, first aspect of the present invention embodiment provides a kind of output control method.The control method is applied to
In PWM controller, for the break-make of controlling switch pipe.The output control method comprises the steps.
Step 101, acquisition output voltage.
It should be noted that the control method is applied to PWM controller, for the break-make of controlling switch pipe, wherein, institute
It can be in the components and parts of power supply (such as flyback sourse) to state PWM controller and switching tube.The unit of the main consumption electric energy in power supply
Device includes open the light pipe, diode and transformer.And the power that the pipe that opens the light, diode and transformer are consumed with switching frequency into
Direct ratio.The output voltage of the power supply can have small difference by the load state of power supply connection described in root.Therefore, it can according to output
The situation judging load state of voltage.
Step 102, the output voltage and first and second threshold voltage are compared, and export comparative result, its
Described in first threshold voltage be more than the second threshold voltage.
Due to load state different, the output voltage also simply slightly different, therefore first and second threshold voltage can
To be set according to actual needs.
Step 103, the pwm signal for exporting corresponding dutycycle according to the comparative result, wherein, the pwm signal of output
Make the ON time of switching tube identical.
Specifically, step 103 includes：
When the output voltage is more than first threshold voltage, the first comparative result is exported.
Now show that the load is heavy condition.
When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported.
Now show that the load is light condition.
When the output voltage is less than second threshold voltage, the 3rd comparative result is exported.
Now show that the load is standby.
Further, step 103 includes：
First to the 3rd pwm signal, the wherein first to the 3rd pwm signal are exported according to the described first to the 3rd comparative result
Dutycycle be respectively the first to the 3rd dutycycle, first dutycycle is more than the 3rd dutycycle, and the 3rd dutycycle is big
In the second dutycycle.
It should be noted that when the first comparative result is exported, showing load for heavy condition, therefore need to provide dutycycle
Big pwm signal, the normal work demand of holding circuit.When the second comparative result is exported, show load for light condition, therefore
The output for adjusting pwm signal is needed, suitably reduces dutycycle.When three comparative results is exported, show load for holding state,
Therefore dutycycle is adjusted further, to reduce power consumption.
It should be noted that the pwm signal of output makes the ON time of switching tube identical, accounted for guaranteeing to adjust in any case
Empty ratio, the time of the pwm signal controlling switch pipe conducting of output are constant, not affect normal work, such that it is able to according to reality
Border needs to adjust dutycycle, so as to reduce power, saves the energy.
Fig. 2 is referred to, second aspect of the present invention embodiment provides a kind of output control system 300.The output control system
System 300 is applied in PWM controller, and the output control system 300 includes that acquiring unit 310, comparing unit 320 and control are single
Unit 330.
The acquiring unit 310 is used for obtaining output voltage.
It should be noted that the output control system 300 is applied to PWM controller, for the break-make of controlling switch pipe,
Wherein, the PWM controller and switching tube can be in the components and parts of power supply (such as flyback sourse).Main consumption electricity in power supply
The components and parts of energy include open the light pipe, diode and transformer.And the power that the pipe that opens the light, diode and transformer are consumed with switch
Frequency is directly proportional.The output voltage of the power supply can have small difference by the load state of power supply connection described in root.Therefore, it can root
Situation judging load state according to output voltage.
The comparing unit 320 is used for being compared the output voltage with first and second threshold voltage, and exports
Comparative result, wherein described first threshold voltage are more than the second threshold voltage.
Due to load state different, the output voltage also simply slightly different, therefore first and second threshold voltage can
To be set according to actual needs.
Described control unit 330 is used for the pwm signal for exporting corresponding dutycycle according to the comparative result, wherein, defeated
The pwm signal for going out makes the ON time of switching tube identical.
Wherein, the comparing unit is used for when the output voltage is more than first threshold voltage, and knot is compared in output first
Really；When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；Described
When output voltage is less than second threshold voltage, the 3rd comparative result is exported.
It should be noted that when the output voltage is more than first threshold voltage, exporting the first comparative result, now table
The bright load is heavy condition.When the output voltage is less than first threshold voltage and is more than second threshold voltage, output
Second comparative result, now shows that the load is light condition.When the output voltage is less than second threshold voltage, output
3rd comparative result, now shows that the load is standby.
Wherein, described control unit is used for exporting the first to the 3rd pwm signal according to the described first to the 3rd comparative result,
The dutycycle of the wherein first to the 3rd pwm signal is respectively the first to the 3rd dutycycle, and first dutycycle is accounted for more than the 3rd
Empty ratio, the 3rd dutycycle are more than the second dutycycle (referring to Fig. 2).
It should be noted that when the first comparative result is exported, showing load for heavy condition, therefore need to provide dutycycle
Big pwm signal, the normal work demand of holding circuit.When the second comparative result is exported, show load for light condition, therefore
The output for adjusting pwm signal is needed, suitably reduces dutycycle.When three comparative results is exported, show load for holding state,
Therefore dutycycle is adjusted further, to reduce power consumption.
It should be noted that the pwm signal of output makes the ON time of switching tube identical, accounted for guaranteeing to adjust in any case
Empty ratio, the time of the pwm signal controlling switch pipe conducting of output are constant, not affect normal work, such that it is able to according to reality
Border needs to adjust dutycycle, so as to reduce power, saves the energy.
Fig. 3 is referred to, third aspect of the present invention embodiment provides a kind of liquid crystal display 400.The liquid crystal display 400
The switching tube 420 being connected including PWM controller 410 and with PMW controllers 410.The PWM controller 420 includes output control
System.In the present embodiment, the output control system 300 that the output control system is provided for above-mentioned alternative plan.Specially：
The output control system 300 includes acquiring unit 310, comparing unit 320 and control unit 330.
The acquiring unit 310 is used for obtaining output voltage.
It should be noted that the output control system 300 is applied to PWM controller 410, for controlling switch pipe 420
Break-make, wherein, the PWM controller 410 and switching tube 420 can be in the components and parts of power supply (such as flyback sourse).Power supply
In the components and parts of main consumption electric energy include open the light pipe, diode and transformer.And the pipe that opens the light, diode and transformer consumption
Power be directly proportional to switching frequency.The output voltage of the power supply can the load state of power supply connection described in root have small not
With.Therefore, it can the situation judging load state according to output voltage.
The comparing unit 320 is used for being compared the output voltage with first and second threshold voltage, and exports
Comparative result, wherein described first threshold voltage are more than the second threshold voltage.
Due to load state different, the output voltage also simply slightly different, therefore first and second threshold voltage can
To be set according to actual needs.
Described control unit 330 is used for the pwm signal for exporting corresponding dutycycle according to the comparative result, wherein, defeated
The pwm signal for going out makes the ON time of switching tube identical.
Wherein, the comparing unit is used for when the output voltage is more than first threshold voltage, and knot is compared in output first
Really；When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；Described
When output voltage is less than second threshold voltage, the 3rd comparative result is exported.
It should be noted that when the output voltage is more than first threshold voltage, exporting the first comparative result, now table
The bright load is heavy condition.When the output voltage is less than first threshold voltage and is more than second threshold voltage, output
Second comparative result, now shows that the load is light condition.When the output voltage is less than second threshold voltage, output
3rd comparative result, now shows that the load is standby.
Wherein, described control unit is used for exporting the first to the 3rd pwm signal according to the described first to the 3rd comparative result,
The dutycycle of the wherein first to the 3rd pwm signal is respectively the first to the 3rd dutycycle, and first dutycycle is accounted for more than the 3rd
Empty ratio, the 3rd dutycycle are more than the second dutycycle (referring to Fig. 2).
It should be noted that when the first comparative result is exported, showing load for heavy condition, therefore need to provide dutycycle
Big pwm signal, the normal work demand of holding circuit.When the second comparative result is exported, show load for light condition, therefore
The output for adjusting pwm signal is needed, suitably reduces dutycycle.When three comparative results is exported, show load for holding state,
Therefore dutycycle is adjusted further, to reduce power consumption.
It should be noted that the pwm signal of output makes the ON time of switching tube 420 identical, to guarantee to adjust in any case
Whole dutycycle, the time of the conducting of pwm signal controlling switch pipe 420 of output are constant, not affect normal work, such that it is able to
Adjust dutycycle according to actual needs, so as to reduce power, save the energy.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the feature described with reference to the embodiment or example
It is contained at least one embodiment or example of the present invention.In this manual, the schematic representation of above-mentioned term is differed
Identical embodiment or example are referred to surely.And, the specific features of description, structure, material or feature can be any one
Combined in individual or multiple embodiments or example in an appropriate manner.
Embodiments described above, does not constitute the restriction to the technical scheme protection domain.Any in above-mentioned enforcement
Modification, equivalent and improvement that is made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (9)
1. a kind of output control method, is applied in PWM controller, it is characterised in that：The output control method includes：
Obtain output voltage；
The output voltage is compared with first and second threshold voltage, and exports comparative result, wherein described first threshold
Threshold voltage is more than the second threshold voltage；
According to the pwm signal that the comparative result exports corresponding dutycycle, wherein, the pwm signal of output makes leading for switching tube
The logical time is identical.
2. output control method as claimed in claim 1, it is characterised in that by the output voltage and first and second threshold value
Voltage is compared, and exports comparative result and include：
When the output voltage is more than first threshold voltage, the first comparative result is exported；
When the output voltage is less than first threshold voltage and is more than second threshold voltage, the second comparative result is exported；
When the output voltage is less than second threshold voltage, the 3rd comparative result is exported.
3. output control method as claimed in claim 2, it is characterised in that corresponding duty is exported according to the comparative result
The pwm signal of ratio includes：
First to the 3rd pwm signal is exported according to the described first to the 3rd comparative result, wherein first to the 3rd pwm signal is accounted for
Empty the respectively first to the 3rd dutycycle of ratio, first dutycycle are more than the 3rd dutycycle, and the 3rd dutycycle is more than the
Two dutycycles.
4. a kind of output control system, is applied in PWM controller, it is characterised in that：The output control system includes obtaining
Unit, comparing unit and control unit, the acquiring unit are used for obtaining output voltage；The comparing unit is used for will be described defeated
Go out voltage to be compared with first and second threshold voltage, and export comparative result, wherein described first threshold voltage is more than institute
State second threshold voltage；Described control unit is used for the pwm signal for exporting corresponding dutycycle according to the comparative result, its
In, the pwm signal of output makes the ON time of switching tube identical.
5. output control system as claimed in claim 4, it is characterised in that the comparing unit is used in the output voltage
During more than first threshold voltage, the first comparative result is exported；Less than first threshold voltage and it is more than second in the output voltage
During threshold voltage, the second comparative result is exported；When the output voltage is less than second threshold voltage, knot is compared in output the 3rd
Really.
6. output control system as claimed in claim 5, it is characterised in that described control unit be used for according to described first to
3rd comparative result exports the first to the 3rd pwm signal, and the dutycycle of the wherein first to the 3rd pwm signal is respectively first to the
Three dutycycles, first dutycycle are more than the 3rd dutycycle, and the 3rd dutycycle is more than the second dutycycle.
7. the switching tube that a kind of liquid crystal display is included PWM controller and is connected with PMW controllers, the PWM controller include
Output control system, the output control system include that acquiring unit, comparing unit and control unit, the acquiring unit are used for
Obtain output voltage；The comparing unit is used for being compared the output voltage with first and second threshold voltage, and defeated
Go out comparative result, wherein described first threshold voltage is more than the second threshold voltage；Described control unit is used for according to described
Comparative result exports the pwm signal of corresponding dutycycle, and wherein, the pwm signal of output makes the ON time of switching tube identical.
8. liquid crystal display as claimed in claim 7, it is characterised in that the comparing unit is used for big in the output voltage
When first threshold voltage, the first comparative result is exported；Less than first threshold voltage and it is more than the second threshold in the output voltage
During threshold voltage, the second comparative result is exported；When the output voltage is less than second threshold voltage, the 3rd comparative result is exported.
9. liquid crystal display as claimed in claim 8, it is characterised in that described control unit is used for according to described first to the
Three comparative results export the first to the 3rd pwm signal, and the dutycycle of the wherein first to the 3rd pwm signal is respectively first to the 3rd
Dutycycle, first dutycycle are more than the 3rd dutycycle, and the 3rd dutycycle is more than the second dutycycle.
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