CN103943089B - A kind of liquid crystal panel drive circuit and driving method, display device - Google Patents
A kind of liquid crystal panel drive circuit and driving method, display device Download PDFInfo
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- CN103943089B CN103943089B CN201410150397.2A CN201410150397A CN103943089B CN 103943089 B CN103943089 B CN 103943089B CN 201410150397 A CN201410150397 A CN 201410150397A CN 103943089 B CN103943089 B CN 103943089B
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Abstract
The embodiment of the present invention provides a kind of liquid crystal panel drive circuit and driving method, display device, relates to Display Technique field, by increasing capacitance it is possible to increase the charging voltage of pixel cell, thus reduces the charging interval, promotes the driving force to display floater load.This liquid crystal panel includes that grid line and data wire, grid line and data wire transverse and longitudinal are intersected and defines multiple pixel cell being arranged in matrix.Liquid crystal panel drive circuit includes pixel charhing unit.This pixel charhing unit combines as the driving voltage of data wire for the voltage that row is opened signal end and the input of data voltage signal end.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of liquid crystal panel drive circuit and driving method, display
Device.
Background technology
(Thin Film Transistor Liquid Crystal Display, TFT-LCD shows TFT-LCD
Show device) as a kind of panel display apparatus, have that volume is little, low in energy consumption, radiationless because of it and cost of manufacture is relatively low etc.
Feature, and be applied to more and more in the middle of high-performance display field.
In prior art, the structure of TFT-LCD is generally as it is shown in figure 1, include display floater 10 and driver element, wherein
This driver element includes again: time schedule controller (Timing Controller, be called for short T/CON) 100, gate drivers 101 and
Source electrode driver 102.Concrete, under the control of time schedule controller 100, gate drivers 101 controls grid line (G1 ... Gn)
Signal output, open the most line by line on every grid line connect thin film transistor (TFT)；Source electrode driver 102 controls data wire
(S1 ... Sn) signal output so that display floater 10 shows different pictures, wherein transverse and longitudinal intersect grid line and data wire
Intersect and define multiple pixel cell being arranged in matrix.
Wherein, time schedule controller 100 output control sequential in, by row open signal (Clock Pluse Vertical,
It is called for short CPV) control being switched on and off of each row grid.Concrete control process is: initial signal (Start Vertical, letter
Claim STV) send a high ordinary mail number, represent that grid can be opened.Then, when CPV is rising edge, the grid of the first row TFT is beaten
Open, at this moment by source electrode driver 102, data signal is loaded into through the source electrode of TFT the storage electric capacity at the first row liquid crystal two ends
CS1On, the first row TFT starts to charge up；When the next rising edge of CPV arrives, the grid of the first row TFT is closed, accordingly
Data signal loaded, the first row TFT completes charging, and the grid of the second row TFT is opened simultaneously, and data signal is through TFT's
Source electrode is loaded into CS on the storage electric capacity at the second row liquid crystal two ends2, the action situation of the TFT of following row is by that analogy.
Development along with Display Technique, it is desirable to the screen size of TFT-LCD display floater is increasing, resolution and
PPI (Pixels Per Inch, the number of pixels that per inch is had) is more and more higher.But, when the driving force of liquid crystal load
Time not enough, pixel cell cannot be charged at short notice, thus causes LCD cannot meet high-resolution and high PPI
Requirement, thus reduce properties of product and quality.
Summary of the invention
Embodiments of the invention provide a kind of liquid crystal panel drive circuit and driving method, display device.Can increase
The charging voltage of pixel cell, thus reduce the charging interval, promote the driving force to display floater load.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
The one side of the embodiment of the present invention, it is provided that a kind of liquid crystal panel drive circuit, described liquid crystal panel include grid line and
Data wire, described grid line and described data wire transverse and longitudinal intersection define multiple pixel cell being arranged in matrix, described liquid crystal
Panel drive circuit includes pixel charhing unit；Described pixel charhing unit is for opening signal end and data voltage signal by row
The voltage of end input combines the driving voltage as described data wire.
The another aspect of the embodiment of the present invention, it is provided that a kind of display device, including any one liquid crystal surface as above
Drive circuit.
The another aspect of the embodiment of the present invention, it is provided that the driving method of a kind of liquid crystal panel drive circuit, described liquid crystal surface
Plate includes that grid line and data wire, described grid line and described data wire transverse and longitudinal are intersected and defines multiple pixel list being arranged in matrix
Unit, described method includes:
Row opens signal end and data voltage signal end to pixel charhing unit input voltage signal；
The voltage that described row unlatching signal end inputs with described data voltage signal end is tied by described pixel charhing unit mutually
Cooperation is the driving voltage of described data wire.
The embodiment of the present invention provides a kind of liquid crystal panel drive circuit and driving method, display device.This liquid crystal panel
Intersect including grid line and data wire, grid line and data wire transverse and longitudinal and define multiple pixel cell being arranged in matrix.Liquid crystal surface
Drive circuit includes pixel charhing unit.This pixel charhing unit is for by defeated to row unlatching signal end and data voltage signal end
The voltage entered combines the driving voltage as data wire.So, the auxiliary charging voltage of row unlatching signal end input can
To improve the charging voltage of pixel cell, such that it is able to reduce the charging interval, promote the driving force to display floater load.
Accompanying drawing explanation
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
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of a kind of display device that Fig. 1 provides for prior art；
The structural representation of a kind of liquid crystal panel drive circuit that Fig. 2 provides for the embodiment of the present invention；
The structural representation of the another kind of liquid crystal panel drive circuit that Fig. 3 provides for the embodiment of the present invention；
The operation principle schematic diagram of a kind of adder that Fig. 4 provides for the embodiment of the present invention；
The structural representation of another liquid crystal panel drive circuit that Fig. 5 provides for the embodiment of the present invention；
The structural representation of another liquid crystal panel drive circuit that Fig. 6 provides for the embodiment of the present invention；
The operation principle schematic diagram of a kind of reverser that Fig. 7 provides for the embodiment of the present invention；
The working timing figure of a kind of liquid crystal panel drive circuit that Fig. 8 provides for the embodiment of the present invention；
The working timing figure of the another kind of liquid crystal panel drive circuit that Fig. 9 provides for the embodiment of the present invention；
The driving method flow chart of a kind of liquid crystal panel drive circuit that Figure 10 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the present invention provides a kind of liquid crystal panel drive circuit, as in figure 2 it is shown, liquid crystal panel includes grid line 111 He
Data wire 110.Grid line 111 and data wire 110 transverse and longitudinal intersection define multiple pixel cell 112 being arranged in matrix, this liquid
Crystal panel drive circuit may include that pixel charhing unit 113.This pixel charhing unit 113 is for opening signal end CPV by row
Combine the driving voltage as data wire 110 with the voltage of data voltage signal end AVDDS input.
It should be noted that opening the signal of signal end CPV output due to row is that every a line opens the signal being required for
And opening time long enough, order often row is not the most used after opening, and preferably uses row to open signal, it is also possible to utilize
Other signal existing in liquid crystal panel drive circuit, such as gate driver circuit open signal STV, however it is necessary that and STV is believed
Number lengthening, and CPV signal can be constant with length.It addition, above-mentioned pixel charhing unit 113 can be made on display floater 10,
The D-IC (Driver-Interchange, drive integrated circult) shown for driving display floater to carry out can also be made in
On.Such as it is made on source electrode driver 102 as shown in Figure 1.Above-mentioned is only that pixel charhing unit 113 is arranged position
Illustrating, illustrates the most one by one at this, but all should belong to protection scope of the present invention in other position.
The embodiment of the present invention provides a kind of liquid crystal panel drive circuit.This liquid crystal panel includes grid line and data wire, grid line
Intersect with data wire transverse and longitudinal and define multiple pixel cell being arranged in matrix.Liquid crystal panel drive circuit includes that pixel is charged
Unit.This pixel charhing unit combines as data for the voltage that row is opened signal end and the input of data voltage signal end
The driving voltage of line.So, the auxiliary charging voltage of row unlatching signal end input can improve the charged electrical of pixel cell
Pressure, such that it is able to reduce the charging interval, promotes the driving force to display floater load.
Further, each data line 110 connects a pixel charhing unit 113.So, pixel charhing unit
113 can provide driving voltage to each data line 110, are beneficial to each data line 110 is operated alone control.Make
The pixel cell that must be defined by this column data line all can be expert at and be opened under the auxiliary charging voltage effect that signal end inputs, quickly
Charging, such that it is able to reduce the charging interval of liquid crystal.
Further, as it is shown on figure 3, pixel charhing unit 113 may include that pixel charge switch 200 and adder
201。
First pole of pixel charge switch 200 connects row and opens signal end CPV, grid and data voltage signal end AVDDS
It is connected.
The input of adder 201 connects data voltage signal end AVDDS and the second of pixel charge switch 200 respectively
Pole；Outfan is connected with data wire 110.
So, when data voltage signal end AVDDS is while adder 201 inputs data voltage signal, permissible
Pixel charge switch 200 is opened, so that the row unlatching signal of row unlatching signal end CPV input is as auxiliary charging voltage,
Input is to adder 201.Thus under the effect of adder 201, row is opened signal end CPV and data voltage signal end
The voltage of AVDDS input carries out being added the driving voltage as data wire 110, to increase the charging voltage of pixel cell 112.
Further, above-mentioned adder includes: the first resistance R1, the second resistance R2, the 3rd resistance R3 and the first computing
Amplifier 210.
One end of first resistance R1 connects the second pole of pixel charge switch 200, the other end and the first operational amplifier 210
Inverting input be connected.
One end of second resistance R2 connects the anti-of data voltage signal end AVDDS, the other end and the first operational amplifier 210
Phase input is connected.
One end of 3rd resistance R3 connects the inverting input of the first operational amplifier 210, the other end and the first computing and puts
The outfan of big device 210 is connected.
The in-phase input end ground connection of the first operational amplifier 210.
Concrete, the operation principle of this adder 201 can be as shown in Figure 4, it can be deduced that:
Further,
So, U is worked asi1The voltage of signal end CPV input, U is opened for rowi2Input for data voltage signal end AVDDS
Voltage, and R3=R1=R2Time；The voltage inputted to data wire 110 by this adder 201 is U0=-(Ui1+Ui2).Due to row
The voltage opening signal end CPV input carries out auxiliary charging as auxiliary charging voltage to pixel cell 112, therefore can improve
The charging voltage of pixel cell, such that it is able to reduce the charging interval, promotes the driving force to display floater load.Need explanation
, above-mentioned adder is reverse adder.
Further, when adder 201 is reverse adder, as it is shown in figure 5, above-mentioned pixel charhing unit 113 also may be used
To include: phase inverter 202.
Phase inverter 202 connects adder 201 and data wire 110 respectively, for changing adder 201 output voltage signal
Direction.So, when the direction of the voltage signal of adder 201 output is negative, by phase inverter 202, so that defeated
Enter the direction of the voltage signal to data wire 110 on the occasion of.Such that it is able to in the sequential chart of existing display control field, right
The conventional direction of the voltage signal transmitted on data wire is consistent, in order to above-mentioned sequential chart is painted by those skilled in the art
System and analysis.Certainly, when the direction of the voltage signal of adder 201 output is timing, by phase inverter 202, so that defeated
The direction entering the voltage signal to data wire 110 is negative value.It is thus possible to meet different to the voltage signal side on data wire
To requirement.
Further, as shown in Figure 6, above-mentioned phase inverter 202 includes: the 4th resistance R4, the 5th resistance R5, and second fortune
Calculate amplifier 211；
4th resistance R4One end connect the outfan of the first operational amplifier 210, the other end and the second operational amplifier
The inverting input of 211 is connected.
5th resistance R5One end connect the inverting input of the second operational amplifier 211, the other end and the second computing are put
The outfan of big device 211 is connected.
The in-phase input end ground connection of the second operational amplifier 211.
Concrete, the operation principle of this phase inverter 202 can as it is shown in fig. 7, it follows that
Work as R4=R5Time, U=-U0；
Therefore U=-(-(Ui1+Ui2))=Ui1+Ui2
So, when the direction of the voltage signal of adder 201 output is negative, by phase inverter 202, so that
The direction of voltage signal inputted to data wire 110 be on the occasion of.Such that it is able to control data wire in sequential chart with existing display
The conventional direction of the voltage signal transmitted is consistent, in order to above-mentioned sequential chart is drawn and divides by those skilled in the art
Analysis.
Further, above-mentioned row opens voltage (the i.e. U of signal end CPV inputi1) can be 3.3V.
It should be noted that for each data line 110 on display floater 10, owing to needing at the display initial stage
Gamma regulates, and extra on data wire 110 can apply a 3.3V voltage, but the time is the shortest, regulating gamma when only
Will with before do fine setting the most permissible.The most above-mentioned illustration being only row is opened signal end CPV input voltage amplitude,
The voltage of other amplitude is illustrated the most one by one at this, but all should belong to protection scope of the present invention.
Further, voltage (the i.e. U of above-mentioned data voltage signal end AVDDS inputi2) it is 6-10V.So, grid are worked as
When line 111 gates, the voltage of data wire 110 output, it is possible to be charged pixel cell 112, to drive display floater 10 to show
Diagram picture.
It should be noted that as shown in Figure 8, when row opens voltage (the i.e. U of signal end CPV inputi1) can be 3.3V；Number
Voltage (i.e. U according to the input of voltage signal end AVDDSi2) when being 10V, through adder 201 computing will input to data wire 110
The amplitude of voltage be overlapped, so that voltage (the i.e. U of data wire 110 output0) it is 3.3V+10V.So, row is opened
The voltage 3.3V opening signal end CPV input as auxiliary charging voltage, thus can add the charging voltage of pixel cell, subtracts
In the little charging interval, improve the driving force to display floater load.
Below in conjunction with Fig. 6 and sequential chart Fig. 9, the work process of pixel charhing unit 200 is described in detail.
In the T1 stage, row is opened signal end CPV and was accessed about before data voltage signal end AVDDS input voltage signal
The voltage of 3.3V.At this moment exporting due to data voltage signal end AVDDS no signal, therefore transistor M is off.So
Display floater 10 can not be charged at T1 stage pixel charhing unit 200.
The T2 stage, data voltage signal end AVDDS under the control of D-IC (drive integrated circult), output voltage signal,
Display floater 10 is charged.At this moment, pixel charge switch 200 is opened the most therewith, and row opens the voltage of signal end CPV input
(i.e. Ui1) and voltage (the i.e. U of data voltage signal end AVDDS inputi2) all access in adder 201.So, adder
The voltage U of 201 outputs0=-(Ui1+Ui2)；Its direction is negative, this voltage U0After the process of phase inverter 202, data wire 110
On there is voltage U=Ui1+Ui2；Direction is just.
In the T3 stage, row opens the voltage signal cut-off of signal end CPV input, then for increasing the auxiliary charging of charging voltage
Process terminates.At this moment, the voltage that voltage is data voltage signal end AVDDS input of adder 201 output, i.e. U0=-Ui2, side
To for negative, this voltage U0After the process of phase inverter 202, data wire 110 has voltage U=Ui2；Direction is just.
In the T4 stage, the voltage signal cut-off of data voltage signal end AVDDS input, charging process terminates.
By above step, owing to row to be opened the voltage of signal end CPV input, display floater 10 is carried out auxiliary charging,
Add the driving force of D-IC (drive integrated circult), shorten the charging interval of pixel cell.So that display
Device meets high PPI and high-resolution requirement.
The embodiment of the present invention provides a kind of display device, including liquid crystal panel drive circuit as above.Have and this
The identical beneficial effect of liquid crystal panel drive circuit that invention previous embodiment provides, owing to liquid crystal panel drive circuit is aforementioned
Having been carried out in embodiment describing in detail, here is omitted.
It should be noted that in embodiments of the present invention, display device specifically can include liquid crystal indicator, such as should
Display device can be that liquid crystal display, LCD TV, DPF, mobile phone or panel computer etc. are any has display function
Product or parts.
The embodiment of the present invention provides a kind of display device, and including liquid crystal panel drive circuit, this liquid crystal panel includes grid line
With data wire, grid line and data wire transverse and longitudinal intersection define multiple pixel cell being arranged in matrix.Liquid crystal panel drives electricity
Road includes pixel charhing unit.This pixel charhing unit for opening signal end and the voltage of data voltage signal end input by row
Combine the driving voltage as data wire.So, the auxiliary charging voltage of row unlatching signal end input can improve picture
The charging voltage of element unit, such that it is able to reduce the charging interval, promotes the driving force to display floater load.
The embodiment of the present invention provides the driving method of a kind of liquid crystal panel drive circuit, and liquid crystal panel includes grid line 111 He
Data wire 110, grid line 111 and data wire 110 transverse and longitudinal intersection define multiple pixel cell 112 being arranged in matrix, such as figure
Shown in 10, said method may include that
S101, row open signal end CPV and data voltage signal end AVDDS to pixel charhing unit 113 input voltage
Signal.
Row is opened signal end CPV and the voltage of data voltage signal end AVDDS input by S102, pixel charhing unit 113
Combine the driving voltage as data wire 110.
The embodiment of the present invention provides the driving method of a kind of liquid crystal panel drive circuit, and this liquid crystal panel includes grid line sum
Intersect according to line, grid line and data wire transverse and longitudinal and define multiple pixel cell being arranged in matrix.Above-mentioned driving method includes: OK
Open signal end and data voltage signal end to pixel charhing unit input voltage signal.Row is opened letter by pixel charhing unit
The voltage of number end and the input of data voltage signal end combines the driving voltage as data wire.So, row opens signal
The auxiliary charging voltage of end input can improve the charging voltage of pixel cell, such that it is able to reduce the charging interval, promotes aobvious
Show the driving force of panel load.
Further, the driving method of above-mentioned liquid crystal panel drive circuit can also include:
When pixel charge switch 200 is opened, described row is opened signal end CPV and data voltage signal by adder 201
The voltage of end AVDDS input combines the driving voltage as data wire 110.
So, when data voltage signal end AVDDS is while adder 201 inputs data voltage signal, permissible
Pixel charge switch 200 is opened, so that the row unlatching signal of row unlatching signal end CPV input is as auxiliary charging voltage,
Input is to adder 201.Thus under the effect of adder 201, row is opened signal end CPV and data voltage signal end
The voltage of AVDDS input carries out being added the driving voltage as data wire 110, to increase the charging voltage of pixel cell 112.
Further, the driving method of above-mentioned liquid crystal panel drive circuit can also include:
Phase inverter 202 changes the direction of adder 201 output voltage signal.So, when the electricity of adder 201 output
When the direction of pressure signal is for bearing, by phase inverter 202, so that the direction inputting the voltage signal to data wire 110 is just
Value.Such that it is able to it is consistent to control the conventional direction of the voltage signal that data wire is transmitted in sequential chart with existing display, with
Just above-mentioned sequential chart is drawn and is analyzed by those skilled in the art.Certainly, the side of the voltage signal exported when adder 201
To for timing, by phase inverter 202, so that input to the direction of the voltage signal of data wire 110 is negative value.It is thus possible to
Meet the different requirements to the voltage signal direction on data wire.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (6)
1. a liquid crystal panel drive circuit, described liquid crystal panel includes grid line and data wire, described grid line and described data wire
Transverse and longitudinal intersection defines multiple pixel cell being arranged in matrix, it is characterised in that described liquid crystal panel drive circuit includes
Pixel charhing unit；The voltage that described pixel charhing unit inputs with data voltage signal end for row is opened signal end is tied mutually
Cooperation is the driving voltage of described data wire；
Described pixel charhing unit includes: pixel charge switch and adder；
First pole of described pixel charge switch connects described row and opens signal end, and grid is connected with described data voltage signal end
Connect；
The input of described adder connects described data voltage signal end and the second pole of described pixel charge switch respectively；Defeated
Go out end to be connected with described data wire；
When described adder is reverse adder, described pixel charhing unit also includes: phase inverter；
Described phase inverter connects described adder and described data wire respectively, for changing described adder output voltage signal
Direction.
Liquid crystal panel drive circuit the most according to claim 1, it is characterised in that each described data wire connects an institute
State pixel charhing unit.
Liquid crystal panel drive circuit the most according to claim 1, it is characterised in that described adder includes: the first resistance,
Second resistance, the 3rd resistance and the first operational amplifier；
One end of described first resistance connects the second pole of described pixel charge switch, the other end and described first operational amplifier
Inverting input be connected；
One end of described second resistance connects described data voltage signal end, and the other end is anti-phase with described first operational amplifier
Input is connected；
One end of described 3rd resistance connects the inverting input of described first operational amplifier, the other end and described first computing
The outfan of amplifier is connected；
The in-phase input end ground connection of described first operational amplifier.
Liquid crystal panel drive circuit the most according to claim 3, it is characterised in that described phase inverter includes: the 4th resistance,
5th resistance and the second operational amplifier；
One end of described 4th resistance connects the outfan of described first operational amplifier, the other end and the second operational amplifier
Inverting input is connected；
One end of described 5th resistance connects the inverting input of described second operational amplifier, the other end and described second computing
The outfan of amplifier is connected；
The in-phase input end ground connection of described second operational amplifier.
5. a display device, it is characterised in that include the liquid crystal panel drive circuit as described in Claims 1-4 is arbitrary.
6. a driving method for liquid crystal panel drive circuit, described liquid crystal panel includes grid line and data wire, described grid line and
Described data wire transverse and longitudinal intersection defines multiple pixel cell being arranged in matrix, it is characterised in that described method includes:
Row opens signal end and data voltage signal end to pixel charhing unit input voltage signal；
Described row is opened the voltage of signal end and the input of described data voltage signal end and is combined work by described pixel charhing unit
Driving voltage for described data wire；
When pixel charge switch is opened, described row is opened signal end and the electricity of described data voltage signal end input by adder
Press the driving voltage as described data wire that combines；
When described adder is reverse adder, described method also includes:
Phase inverter changes the direction of described adder output voltage signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150397.2A CN103943089B (en) | 2014-04-15 | A kind of liquid crystal panel drive circuit and driving method, display device | |
| US14/498,345 US9430984B2 (en) | 2014-04-15 | 2014-09-26 | Display panel driving circuit, driving method thereof, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150397.2A CN103943089B (en) | 2014-04-15 | A kind of liquid crystal panel drive circuit and driving method, display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103943089A CN103943089A (en) | 2014-07-23 |
| CN103943089B true CN103943089B (en) | 2016-11-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594134A (en) * | 2009-06-01 | 2009-12-02 | 中国航空工业集团公司西安飞机设计研究所 | A kind of PWM sweep frequency signal conversion circuit |
| CN102368793A (en) * | 2011-10-12 | 2012-03-07 | 惠州Tcl移动通信有限公司 | Cell phone and conversation signal processing method thereof |
| CN202383982U (en) * | 2012-01-06 | 2012-08-15 | 北京京东方光电科技有限公司 | Device for regulating common electrode voltage, PCB and liquid crystal display module |
| CN103295552A (en) * | 2013-06-18 | 2013-09-11 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) backlight driving circuit and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594134A (en) * | 2009-06-01 | 2009-12-02 | 中国航空工业集团公司西安飞机设计研究所 | A kind of PWM sweep frequency signal conversion circuit |
| CN102368793A (en) * | 2011-10-12 | 2012-03-07 | 惠州Tcl移动通信有限公司 | Cell phone and conversation signal processing method thereof |
| CN202383982U (en) * | 2012-01-06 | 2012-08-15 | 北京京东方光电科技有限公司 | Device for regulating common electrode voltage, PCB and liquid crystal display module |
| CN103295552A (en) * | 2013-06-18 | 2013-09-11 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) backlight driving circuit and method |
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