CN107947569A - One kind disappears shadow voltage control system and method - Google Patents
One kind disappears shadow voltage control system and method Download PDFInfo
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- CN107947569A CN107947569A CN201711380225.4A CN201711380225A CN107947569A CN 107947569 A CN107947569 A CN 107947569A CN 201711380225 A CN201711380225 A CN 201711380225A CN 107947569 A CN107947569 A CN 107947569A
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- 238000000034 method Methods 0.000 title claims description 18
- 230000003071 parasitic effect Effects 0.000 claims abstract description 100
- 238000001514 detection method Methods 0.000 claims abstract description 67
- 230000007306 turnover Effects 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 17
- 230000000630 rising effect Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 12
- 230000024241 parasitism Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
Classifications
-
- 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
- H02M3/06—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Disappear shadow voltage control system the present invention provides one kind, it is connected with parasitic capacitance, including charging module, discharge module and voltage detection module, voltage detection module is connected to charging module and discharge module, wherein, voltage detection module is used for the port voltage for detecting parasitic capacitance, controls charging module to charge parasitic capacitance according to the port voltage of parasitic capacitance or controls discharge module to discharge parasitic capacitance so that the port voltage of parasitic capacitance is equal to the default shadow voltage that disappears.The present invention is realized independent of specific parasitic capacitance size to control the shadow voltage that disappears, respectively the shadow time that disappears need not be set to can reach the identical specific shadow voltage that disappears in different display screens, and the poor situation of shadow voltage uniformity that can very well improve or even disappear.
Description
Technical field
The present invention relates to LED drive controls field, more particularly to one kind disappears shadow voltage control system and method.
Background technology
In the higher LED display of density, since distance is close between built-in component and cabling, it can cause in display screen
Parasitic capacitance on circuit is larger (see Fig. 1) so that and display screen fails to discharge the voltage in parasitic capacitance during line feed, from
And the phenomenon of smear can be produced, so that display effect is affected, for such influence, it will usually in the line feed phase of display screen
Between, discharged within a bit of time the voltage of parasitic capacitance (this be for for the parasitic capacitance on line, and to point
Cloth is then to charge in the parasitic capacitance of alignment).Traditional mode is directly to discharge parasitic capacitance, is put by control
Electricity time (disappearing the shadow time) come reach electric discharge after needed for voltage, that is, disappear shadow voltage.But due to the parasitism in different display screens
Capacitance difference is larger, therefore it is generally necessary to set the shadow time that disappears for several times to obtain the required specific shadow that disappears in different display screens
Voltage, the uniformity that the difference of this outside plate endoparasitism capacitance is also easy to cause the shadow voltage that disappears are poor.
The content of the invention
Disappear shadow voltage control system and method it is an object of the invention to provide one kind.
On the one hand, the embodiment of the present invention provides one kind and disappears shadow voltage control system, is connected with parasitic capacitance, including charging mould
Block, discharge module and voltage detection module, the voltage detection module are connected to the parasitic capacitance, the charging module and institute
Discharge module is stated, wherein, the voltage detection module is used for the port voltage for detecting the parasitic capacitance, according to the parasitic electricity
The port voltage held controls the charging module to be charged to the parasitic capacitance or control the discharge module to institute
Parasitic capacitance is stated to be discharged so that the port voltage of the parasitic capacitance is equal to the default shadow voltage that disappears.
Preferably, the shadow control module that disappears is further included, is connected to the voltage detection module, for according to the default shadow that disappears
Voltage produces the shadow control signal that disappears, and the shadow control signal that disappears is sent to the voltage detection module, the discharge module
With the charging module.
Preferably, the voltage detection module is Schmidt trigger, and the charging module is PMOS tube, the electric discharge mould
Block is NMOS tube, wherein,
The source electrode of the PMOS tube connects DC power supply, and the grid level of the PMOS tube is the control terminal of the charging module, institute
The drain electrode for stating PMOS tube connects the first end of the parasitic capacitance, the second end ground connection of the parasitic capacitance；
The source electrode of the NMOS tube connects the first end of the parasitic capacitance, and the grid level of the NMOS tube is the discharge module
Control terminal, the grounded drain of the NMOS tube；
The first end of the first termination parasitic capacitance of the Schmidt trigger, the second of the Schmidt trigger
Hold as the control terminal of the Schmidt trigger.
Preferably, if the default shadow voltage that disappears is more than threshold value, the voltage detection module sends discharge signal extremely
The discharge module, discharges the parasitic capacitance by the discharge module；When the voltage detection module detects institute
When stating port voltage and being less than the decline turnover voltage of the Schmidt trigger, the voltage detection module sends discharge off letter
Number to the discharge module, while charging signals are sent to the charging module, by the charging module to the parasitic capacitance
Charge；When the voltage detection module detects that the port voltage is more than the rising upset electricity of the Schmidt trigger
During pressure, charging termination signal is sent to the charging module.
Preferably, if the default shadow voltage that disappears is less than or equal to threshold value, the voltage detection module sends charging
Signal charges the parasitic capacitance by the charging module to the charging module；When the voltage detection module is examined
When measuring the port voltage and being more than the rising turnover voltage of the Schmidt trigger, the voltage detection module sends charging
Termination signal sends discharge signal to the discharge module to the charging module, is posted by the discharge module described
Raw capacitance discharges；When the voltage detection module detects that the port voltage is less than the decline of the Schmidt trigger
During turnover voltage, discharge off signal is sent to the discharge module.
Correspondingly, disappear shadow voltage control method the present invention also provides one kind, comprise the following steps：
Step S1：The port voltage of parasitic capacitance is detected by voltage detection module；
Step S2：Charging module is controlled to fill the parasitic capacitance according to the port voltage of the parasitic capacitance
Electricity or control discharge module discharge the parasitic capacitance so that the port voltage of the parasitic capacitance is equal to default
Disappear shadow voltage.
Preferably, before the step S1, further include：
Step S0：The shadow control signal that disappears is produced according to the default shadow voltage that disappears, and the shadow control signal that disappears is sent
To the voltage detection module, the discharge module and the charging module.
Preferably, the voltage detection module is Schmidt trigger.
Preferably, after the step S0 and before the step S1, further include：
Step S11：Judge whether the default shadow voltage that disappears is more than threshold value.
Preferably, if the default shadow voltage that disappears is more than the threshold value, the step S2 includes：
Discharge signal is sent to the discharge module by the voltage detection module, by the discharge module to the parasitism
Capacitance discharges；
Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if so, by described
Voltage detection module sends discharge off signal to the discharge module, while sends charging signals to the charging module, by
The charging module charges the parasitic capacitance；
Judge that the port voltage is more than the rising turnover voltage of the Schmidt trigger, if so, sending charging eventually
Stop signal is to the charging module；
If the default shadow voltage that disappears is less than or equal to the threshold value, the step S2 includes：
The voltage detection module sends charging signals to the charging module, by the charging module to the parasitic electricity
Appearance charges；
Judge whether the port voltage is more than the rising turnover voltage of the Schmidt trigger, if it is, described
Voltage detection module sends charging termination signal to the charging module, while sends discharge signal to the discharge module, by
The discharge module discharges the parasitic capacitance；
Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if it is, sending
Discharge off signal is to the discharge module.
Implement the embodiment of the present invention, have the advantages that：In the present invention, detected by voltage detection module parasitic
The port voltage of capacitance, controls charging module to charge parasitic capacitance or controls electric discharge according to the port voltage of parasitic capacitance
Module discharges parasitic capacitance so that the port voltage of parasitic capacitance is equal to the default shadow voltage that disappears；Hereby it is achieved that disobey
Rely in specific parasitic capacitance size to control the shadow voltage that disappears, it is not necessary to set the shadow time that disappears i.e. reachable respectively in different display screens
To the identical specific shadow voltage that disappears, and the poor situation of shadow voltage uniformity that can very well improve or even disappear.
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 embodiment or existing
There is attached drawing needed in technology description to be 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, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 show the connection diagram of LED display in the prior art；
Fig. 2 shows the function structure chart for the shadow voltage control system that disappears that one embodiment of the invention provides；
Fig. 3 shows the exemplary circuit structure chart for the shadow voltage control system that disappears that one embodiment of the invention provides；
Fig. 4 show the working timing figure of each timing control signal of the shadow voltage control system that disappears shown in Fig. 3；
Fig. 5 shows the flow chart for the shadow voltage control method that disappears that one embodiment of the invention provides；
Fig. 6 shows the flow chart for the shadow voltage control method that disappears that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment, belongs to the scope of protection of the invention.
Fig. 2 shows the function structure chart for the shadow voltage control system that disappears that one embodiment of the invention provides, for the ease of saying
It is bright, illustrate only with the relevant part of first embodiment of the invention, details are as follows：
Disappear shadow voltage control system 10 the present embodiment provides one kind, be connected with parasitic capacitance 20, disappear shadow voltage control system
10 include charging module 110, discharge module 120 and voltage detection module 130, and the voltage detection module 130 is connected to described
Charging module 110 and the discharge module 120, wherein, the voltage detection module 130 is used to detect the parasitic capacitance 20
Port voltage, the charging module 110 is controlled to the parasitic capacitance 20 according to the port voltage of the parasitic capacitance 20
Charged or control the discharge module 120 to be discharged the parasitic capacitance 20 so that described in the parasitic capacitance 20
Port voltage is equal to the default shadow voltage that disappears.
The present embodiment passes through the shadow voltage implementations that disappear independent of specific parasitic capacitance size, it is not necessary to aobvious in difference
The shadow time that disappears is set to can reach the identical specific shadow voltage that disappears respectively in display screen, and the shadow that can very well improve or even disappear
The poor situation of voltage uniformity.
Fig. 3 shows the exemplary circuit structure chart for the shadow voltage control system that disappears that one embodiment of the invention provides, and is described in detail such as
Under：
As an embodiment of the present invention, the voltage detection module 130 is Schmidt trigger V, and the charging module is
PMOS tube P0, the discharge module are NMOS tube N0, wherein,
The source electrode of the PMOS tube meets DC power supply VDD, the grid level of the PMOS tube is the control terminal of the charging module,
The drain electrode of the PMOS tube meets the parasitic capacitance CpFirst end, the parasitic capacitance CpSecond end ground connection；
The source electrode of the NMOS tube meets the parasitic capacitance CpFirst end, the grid level of the NMOS tube is the electric discharge mould
The control terminal of block, the grounded drain of the NMOS tube；
The first termination parasitic capacitance C of the Schmidt triggerpFirst end, the of the Schmidt trigger
Two ends are the control terminal of the Schmidt trigger.
Further, in an embodiment of the present invention, the shadow control module (not shown) that disappears is further included, is connected to described
Voltage detection module, for producing the shadow control signal that disappears according to the default shadow voltage that disappears, and the shadow control signal that disappears is sent out
Send to the voltage detection module, the discharge module and the charging module.
The present invention, which produces the sensitivity characteristic of voltage and the trigging signal stablized by means of Schmidt trigger, specifically to disappear
Shadow voltage.By using Schmidt trigger as voltage detection module, first pass through electric discharge (charging) module and port electric discharge (is filled
Electricity) to schmidt trigger decline (risings) trigging signal and close electric discharge (charging) module, then again pass through charging (electric discharge)
Module charged to port (electric discharge) to Schmidt rising (decline) trigging signal and charge closing (electric discharge) module, at this time
Port voltage is the required shadow voltage that disappears.The shadow voltage that disappears produced by this mechanism is independent of the big of specific parasitic capacitance
It is small, and the shadow voltage uniformity that has the advantages that to disappear is high.
Further, if the default shadow voltage that disappears is more than threshold value (for example, 1/2VDD), then the voltage detection module
Discharge signal is sent to the discharge module, is discharged by the discharge module the parasitic capacitance；When the voltage is examined
When survey module detects that the port voltage is less than the decline turnover voltage of the Schmidt trigger, the voltage detection module
Discharge off signal is sent to the discharge module, while sends charging signals to the charging module, by the charging module
Charge to the parasitic capacitance；When the voltage detection module detects that the port voltage is more than the schmidt trigger
During the rising turnover voltage of device, charging termination signal is sent to the charging module.In this way, the upset that Schmidt trigger rises
Level VLHFor final " disappear shadow voltage ".
If on the contrary, the default shadow voltage that disappears is less than or equal to threshold value, the voltage detection module sends charging letter
Number to the charging module, charged by the charging module to the parasitic capacitance；When the voltage detection module detects
When being more than the rising turnover voltage of the Schmidt trigger to the port voltage, the voltage detection module sends charging eventually
Stop signal sends discharge signal to the discharge module to the charging module, by the discharge module to the parasitism
Capacitance discharges；When the voltage detection module detects that decline of the port voltage less than the Schmidt trigger is turned over
When turning voltage, discharge off signal is sent to the discharge module.In this way, the trigging signal V that Schmidt trigger declinesHLFor most
Whole " disappear shadow voltage ".
1/2V is higher than with the required specific shadow voltage that disappears belowDDExemplified by offset shadow voltage control system operation principle carry out
Describe in detail：
Fig. 4 show the working timing figure of each timing control signal of the shadow voltage control system that disappears shown in Fig. 3.Such as Fig. 4
It is shown, it is followed successively by from top to bottom in embodiments of the present invention, disappear shadow control signal, discharge signal, charging signals and voltage detecting
Signal.Signal blank_en is in the shadow pattern that disappears for high expression system, when the label in figure represents discharge process or electric discharge 1.
Between, 2. label represents charging process or charging interval.
As shown in figure 4, since the voltage of parasitic capacitance may high pressure VLH, therefore need to be by discharge module first to parasitic capacitance
Voltage is quickly discharged, until the decline trigging signal V less than Schmidt triggerHL, Schmidt trigger generation at this time
Trigging signal, closes electric discharge of the discharge module to parasitic capacitance.It is then turned on charging module and parasitic capacitance is slowly filled
Electricity, until the voltage of parasitic capacitance reaches the rising trigging signal V of schmidt triggerLH, Schmidt produces again at this time overturns electricity
Put down, charge closing module, at this time VLHIt is the shadow voltage that disappears of parasitic capacitance.
Fig. 5 shows the flow chart for the shadow voltage control method that disappears that one embodiment of the invention provides, as shown in figure 5, this hair
The shadow voltage control method that disappears of bright offer, comprises the following steps：
Step S1：The port voltage of parasitic capacitance is detected by voltage detection module；
Step S2：Charging module is controlled to fill the parasitic capacitance according to the port voltage of the parasitic capacitance
Electricity or control discharge module discharge the parasitic capacitance so that the port voltage of the parasitic capacitance is equal to default
Disappear shadow voltage.
The present embodiment passes through the shadow voltage implementations that disappear independent of specific parasitic capacitance size, it is not necessary to aobvious in difference
The shadow time that disappears is set to can reach the identical specific shadow voltage that disappears respectively in display screen, and the shadow that can very well improve or even disappear
The poor situation of voltage uniformity.
Fig. 6 shows the flow chart for the shadow voltage control method that disappears that another embodiment of the present invention provides, as shown in fig. 6, this
The shadow voltage control method that disappears provided is provided, is comprised the following steps：
Step S0：The shadow control signal that disappears is produced according to the default shadow voltage that disappears, and the shadow control signal that disappears is sent
To the voltage detection module, the discharge module and the charging module；
Step S11：Judge whether the default shadow voltage that disappears is more than threshold value；
Step S1：The port voltage of parasitic capacitance is detected by voltage detection module；
Step S2：Charging module is controlled to fill the parasitic capacitance according to the port voltage of the parasitic capacitance
Electricity or control discharge module discharge the parasitic capacitance so that the port voltage of the parasitic capacitance is equal to default
Disappear shadow voltage.
Specifically, if the default shadow voltage that disappears is more than the threshold value, the step S2 includes：
Step S21：Discharge signal is sent to the discharge module by the voltage detection module, by the discharge module pair
The parasitic capacitance is discharged；
Step S22：Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if
It is discharge off signal to be sent to the discharge module by the voltage detection module, while send charging signals and filled to described
Electric module, charges the parasitic capacitance by the charging module；
Step S23：Judge that the port voltage is more than the rising turnover voltage of the Schmidt trigger, if so, hair
Charging termination signal is sent to the charging module；
If the default shadow voltage that disappears is less than or equal to the threshold value, the step S2 includes：
Step S21 '：The voltage detection module sends charging signals to the charging module, by the charging module pair
The parasitic capacitance charges；
Step S22 '：Judge whether the port voltage is more than the rising turnover voltage of the Schmidt trigger, if
It is that then the voltage detection module sends charging termination signal to the charging module, while sends discharge signal and put to described
Electric module, discharges the parasitic capacitance by the discharge module；
Step S23 '：Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if
It is then to send discharge off signal to the discharge module.
The present invention, which produces the sensitivity characteristic of voltage and the trigging signal stablized by means of Schmidt trigger, specifically to disappear
Shadow voltage.By using Schmidt trigger as voltage detection module, first pass through electric discharge (charging) module and port electric discharge (is filled
Electricity) to schmidt trigger decline (risings) trigging signal and close electric discharge (charging) module, then again pass through charging (electric discharge)
Module charged to port (electric discharge) to Schmidt rising (decline) trigging signal and charge closing (electric discharge) module, at this time
Port voltage is the required shadow voltage that disappears.The shadow voltage that disappears produced by this mechanism is independent of the big of specific parasitic capacitance
It is small, and the shadow voltage uniformity that has the advantages that to disappear is high.
The above disclosed power for being only a kind of preferred embodiment of the present invention, the present invention cannot being limited with this certainly
Sharp scope, one of ordinary skill in the art will appreciate that realizing all or part of flow of above-described embodiment, and is weighed according to the present invention
Profit requires made equivalent variations, still falls within and invents covered scope.
Claims (10)
1. one kind disappears, shadow voltage control system, is connected with parasitic capacitance, it is characterised in that including charging module, discharge module and
Voltage detection module, the voltage detection module are connected to the charging module and the discharge module, wherein, the voltage inspection
The port voltage that module is used to detect the parasitic capacitance is surveyed, is filled according to the control of the port voltage of the parasitic capacitance
Electric module charges the parasitic capacitance or controls the discharge module to be discharged the parasitic capacitance so that described
The port voltage of parasitic capacitance is equal to the default shadow voltage that disappears.
2. the shadow voltage control system according to claim 1 that disappears, it is characterised in that further include the shadow control module that disappears, connect
In the voltage detection module, for producing the shadow control signal that disappears according to the default shadow voltage that disappears, and by the shadow control that disappears
Signal is sent to the voltage detection module, the discharge module and the charging module.
3. the shadow voltage control system according to claim 1 that disappears, it is characterised in that the voltage detection module is Schmidt
Trigger, the charging module are PMOS tube, and the discharge module is NMOS tube, wherein,
The source electrode of the PMOS tube connects DC power supply, and the grid level of the PMOS tube is the control terminal of the charging module, described
The drain electrode of PMOS tube connects the first end of the parasitic capacitance, the second end ground connection of the parasitic capacitance；
The source electrode of the NMOS tube connects the first end of the parasitic capacitance, and the grid level of the NMOS tube is the control of the discharge module
End processed, the grounded drain of the NMOS tube；
The first end of the first termination parasitic capacitance of the Schmidt trigger, the second end of the Schmidt trigger are
The control terminal of the Schmidt trigger.
4. the shadow voltage control system according to claim 3 that disappears, it is characterised in that if the default shadow voltage that disappears is more than
Threshold value, then the voltage detection module transmission discharge signal to the discharge module, electric to the parasitism by the discharge module
Appearance is discharged；When the voltage detection module detects that the port voltage is less than the decline upset of the Schmidt trigger
During voltage, the voltage detection module sends discharge off signal to the discharge module, while sends charging signals to described
Charging module, charges the parasitic capacitance by the charging module；When the voltage detection module detects the end
When mouth voltage is more than the rising turnover voltage of the Schmidt trigger, charging termination signal is sent to the charging module.
5. the shadow voltage control system according to claim 3 that disappears, it is characterised in that if the default shadow voltage that disappears is less than
Or equal to threshold value, then the voltage detection module transmission charging signals are to the charging module, by the charging module to described
Parasitic capacitance charges；When the voltage detection module detects that the port voltage is more than the upper of the Schmidt trigger
When rising turnover voltage, the voltage detection module sends charging termination signal to the charging module, while sends discharge signal
To the discharge module, discharged by the discharge module the parasitic capacitance；When the voltage detection module detects
When the port voltage is less than the decline turnover voltage of the Schmidt trigger, discharge off signal is sent to the electric discharge mould
Block.
The shadow voltage control method 6. one kind disappears, it is characterised in that comprise the following steps：
Step S1：The port voltage of parasitic capacitance is detected by voltage detection module；
Step S2：According to the port voltage of the parasitic capacitance control charging module charged to the parasitic capacitance or
Control discharge module discharges the parasitic capacitance so that the port voltage of the parasitic capacitance is equal to the default shadow that disappears
Voltage.
7. the shadow voltage control method according to claim 6 that disappears, it is characterised in that before the step S1, further include：
Step S0：The shadow control signal that disappears is produced according to the default shadow voltage that disappears, and the shadow control signal that disappears is sent to institute
State voltage detection module, the discharge module and the charging module.
The shadow control method 8. LED display according to claim 7 disappears, it is characterised in that the voltage detection module is
Schmidt trigger.
The shadow control method 9. LED display according to claim 8 disappears, it is characterised in that after the step S0 and
Before the step S1, further include：
Step S11：Judge whether the default shadow voltage that disappears is more than threshold value.
The shadow control method 10. LED display according to claim 9 disappears, it is characterised in that if the default shadow electricity that disappears
Pressure is more than the threshold value, then the step S2 includes：
Discharge signal is sent to the discharge module by the voltage detection module, by the discharge module to the parasitic capacitance
Discharge；
Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if so, by the voltage
Detection module sends discharge off signal to the discharge module, while sends charging signals to the charging module, by described
Charging module charges the parasitic capacitance；
Judge that the port voltage is more than the rising turnover voltage of the Schmidt trigger, if so, sending charging termination letter
Number to the charging module；
If the default shadow voltage that disappears is less than or equal to the threshold value, the step S2 includes：
The voltage detection module sends charging signals to the charging module, by the charging module to the parasitic capacitance into
Row charging；
Judge whether the port voltage is more than the rising turnover voltage of the Schmidt trigger, if it is, the voltage
Detection module sends charging termination signal to the charging module, while sends discharge signal to the discharge module, by described
Discharge module discharges the parasitic capacitance；
Judge whether the port voltage is less than the decline turnover voltage of the Schmidt trigger, if it is, sending electric discharge
Termination signal is to the discharge module.
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| CN201711380225.4A CN107947569B (en) | 2017-12-20 | 2017-12-20 | Shadow eliminating voltage control system and method |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142230A (en) * | 2011-03-31 | 2011-08-03 | 广州杰赛科技股份有限公司 | LED (Light Emitting Diode) scanning screen blanking method, device and LED scanning screen |
| JP2012147507A (en) * | 2011-01-06 | 2012-08-02 | Panasonic Corp | Led lighting device and luminaire using the same |
| CN202549251U (en) * | 2012-02-27 | 2012-11-21 | 深圳市明微电子股份有限公司 | Blanking control circuit for LED display screen and LED driving chip |
| CN103312298A (en) * | 2013-07-05 | 2013-09-18 | 东南大学 | Relaxation oscillator for increasing frequency-control current linearity |
| CN103489407A (en) * | 2013-10-12 | 2014-01-01 | 深圳市大族元亨光电股份有限公司 | Non-control-lightening-free shadow elimination circuit for LED (Light Emitting Diode) display screen |
| CN103700348A (en) * | 2013-12-31 | 2014-04-02 | 深圳市华星光电技术有限公司 | Active matrix/organic light emitting diode (AMOLED) drive circuit and drive method thereof |
| CN103745689A (en) * | 2014-01-07 | 2014-04-23 | 深圳市明微电子股份有限公司 | Driver chip of dynamic screen |
| BRPI1009987A2 (en) * | 2009-05-13 | 2016-03-15 | Sharp Kk | "video device" |
| CN105741755A (en) * | 2016-04-20 | 2016-07-06 | 深圳市明微电子股份有限公司 | LED display screen, display circuit and display control chip thereof |
| CN105938703A (en) * | 2016-06-14 | 2016-09-14 | 深圳君略科技有限公司 | Driving chip, driving circuit and driving method capable of eliminating LED ghosting artifact |
| CN106952610A (en) * | 2017-05-27 | 2017-07-14 | 深圳市明微电子股份有限公司 | A kind of LED display disappears shadow control circuit and method |
| CN207743864U (en) * | 2017-12-20 | 2018-08-17 | 深圳市明微电子股份有限公司 | One kind disappears shadow voltage control system |
-
2017
- 2017-12-20 CN CN201711380225.4A patent/CN107947569B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI1009987A2 (en) * | 2009-05-13 | 2016-03-15 | Sharp Kk | "video device" |
| JP2012147507A (en) * | 2011-01-06 | 2012-08-02 | Panasonic Corp | Led lighting device and luminaire using the same |
| CN102142230A (en) * | 2011-03-31 | 2011-08-03 | 广州杰赛科技股份有限公司 | LED (Light Emitting Diode) scanning screen blanking method, device and LED scanning screen |
| CN202549251U (en) * | 2012-02-27 | 2012-11-21 | 深圳市明微电子股份有限公司 | Blanking control circuit for LED display screen and LED driving chip |
| CN103312298A (en) * | 2013-07-05 | 2013-09-18 | 东南大学 | Relaxation oscillator for increasing frequency-control current linearity |
| CN103489407A (en) * | 2013-10-12 | 2014-01-01 | 深圳市大族元亨光电股份有限公司 | Non-control-lightening-free shadow elimination circuit for LED (Light Emitting Diode) display screen |
| CN103700348A (en) * | 2013-12-31 | 2014-04-02 | 深圳市华星光电技术有限公司 | Active matrix/organic light emitting diode (AMOLED) drive circuit and drive method thereof |
| CN103745689A (en) * | 2014-01-07 | 2014-04-23 | 深圳市明微电子股份有限公司 | Driver chip of dynamic screen |
| CN105741755A (en) * | 2016-04-20 | 2016-07-06 | 深圳市明微电子股份有限公司 | LED display screen, display circuit and display control chip thereof |
| CN105938703A (en) * | 2016-06-14 | 2016-09-14 | 深圳君略科技有限公司 | Driving chip, driving circuit and driving method capable of eliminating LED ghosting artifact |
| CN106952610A (en) * | 2017-05-27 | 2017-07-14 | 深圳市明微电子股份有限公司 | A kind of LED display disappears shadow control circuit and method |
| CN207743864U (en) * | 2017-12-20 | 2018-08-17 | 深圳市明微电子股份有限公司 | One kind disappears shadow voltage control system |
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