CN108648694A - A kind of driving method of display device and display device - Google Patents
A kind of driving method of display device and display device Download PDFInfo
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- CN108648694A CN108648694A CN201810415821.XA CN201810415821A CN108648694A CN 108648694 A CN108648694 A CN 108648694A CN 201810415821 A CN201810415821 A CN 201810415821A CN 108648694 A CN108648694 A CN 108648694A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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Abstract
The invention discloses the driving method of a kind of display device and display device, which includes multiple pixel circuits；It is connected to the multiple data lines of multiple pixel circuits；At least one multi-path choice unit, multi-path choice unit include an input terminal and at least two output ends, and each output end connects a data line；Driving unit, for inputting pre-charge voltage to the input terminal of multi-path choice unit in pre-charging stage, and at least two voltage data signals are inputted to the input terminal of multi-path choice unit in the timesharing of data write phase, pre-charge voltage is associated with at least two voltage data signals, pre-charge voltage is more than or equal to the minimum voltage in each voltage data signal, and less than or equal to the maximum voltage in each voltage data signal.Solve the problems, such as that pixel circuit charges incomplete in data write phase in display device, improves charge efficiency and display effect.
Description
Technical field
The present embodiments relate to display technology field more particularly to a kind of driving sides of display device and display device
Method.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display is had using very thin
Machine film layer and glass substrate, when have electric current by when, organic material will shine.Therefore OLED display can be saved significantly
Electric energy is saved, and can be made lighter and thinner.
It include Organic Light Emitting Diode on oled panel, and the pixel electricity that driving Organic Light Emitting Diode is persistently lighted
Road further includes the data line to pixel-driving circuit transmission data signal voltage.In display process, need to charge to data line,
I.e. to data line transfer voltage data signal, pixel circuit drives organic hair according to the voltage data signal on the data line of connection
Optical diode shines.To data line charging process, pre-charging stage and data write phase are generally comprised.In pre-charging stage
In, first one low potential of preliminary filling on data line, is then filled with voltage data signal in data write phase to data line, to
The voltage of writing pixel circuit on data line is set quickly to be charged to ideal potential in data write phase.With the increase of screen size
With the demand of high-definition display device, the increase of data lead and driving chip is inevitably brought.In order to reduce lead
Quantity, generally use multiple selector solve the problems, such as that data lead is excessive.In addition, the line frequency of display panel is smaller and smaller,
In the smaller time, data line charges not exclusively in data write phase.
Invention content
The present invention provides a kind of driving method of display device and display device, solves the pixel circuit in display panel
In the incomplete problem of data write phase charging, to improve charge efficiency and display effect.
In a first aspect, an embodiment of the present invention provides a kind of display device, which includes：
Multiple pixel circuits；
It is connected to the multiple data lines of the multiple pixel circuit；
At least one multi-path choice unit, the multi-path choice unit include an input terminal and at least two output ends,
Each output end connects a data line；
Driving unit, the data line for being electrically connected to the multi-path choice unit by the multi-path choice unit
Charging, the charging process include pre-charging stage and data write phase, in pre-charging stage to the multi-path choice unit
Input terminal input pre-charge voltage, and it is defeated in the input terminal of the data write phase timesharing to the multi-path choice unit
Enter at least two voltage data signals, the pre-charge voltage is associated with described at least two voltage data signals, described
Pre-charge voltage is more than or equal to the minimum voltage in each voltage data signal, and is less than or equal to each voltage data signal
In maximum voltage.
Second aspect, the embodiment of the present invention additionally provide a kind of driving method of display device, and the display device includes：
Multiple pixel circuits；
It is connected to the multiple data lines of the multiple pixel circuit；
At least one multi-path choice unit, the multi-path choice unit include an input terminal and at least two output ends,
Each output end connects a data line；
The driving method includes：
Pre-charging stage inputs pre-charge voltage to the input terminal of the multi-path choice unit；
Data write phase inputs at least two voltage data signals to the input terminal timesharing of the multi-path choice unit；
Wherein, the pre-charge voltage is associated with at least two voltage data signal, and the pre-charge voltage is more than or equal to each institute
The minimum voltage in voltage data signal is stated, and less than or equal to the maximum voltage in each voltage data signal.
Technical solution provided in an embodiment of the present invention, by the way that in pre-charging stage, driving unit passes through multi-path choice unit
To data line input with the associated pre-charge voltage of voltage data signal, reduce data line data write phase cross-pressure；
In data write phase, the voltage data signal on data line is quickly quickly charged to by driving unit by multi-path choice unit
Voltage data signal greatly shortens the charging time of data line.Therefore when the screen ruler of the display panel in display device
When the line frequency of display panel is smaller and smaller, data line may be implemented in data write-in rank by adjusting pre-charge voltage in very little increase
Section charging is complete, to improve charge efficiency and display effect.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Fig. 2 is a kind of sequence diagram of the display device course of work provided in an embodiment of the present invention；
Fig. 3 is a kind of pixel circuit schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of multi-path choice unit provided in an embodiment of the present invention；
Fig. 5 be pulse in a kind of scan line provided in an embodiment of the present invention with the pulse on the first clock cable when
Sequence figure；
Fig. 6 is a kind of flow chart of the driving method of display device provided in an embodiment of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Display panel generally comprises pre-charging stage and data write phase into data line charging process.The prior art
In, in pre-charging stage, one low potential of preliminary filling on data line (is typically that 0V is either shown needed for 255 grayscale to display panel
Voltage), therefore when enter data write phase when, to data line charging can be started to charge up from the current potential of preliminary filling, make data
Line is quickly charged to voltage data signal.However, when voltage data signal and pre-charge voltage differ greatly, data line is in data
Write phase will appear voltage jump, cause data line charging incomplete.For example, when pre-charge voltage is 0V or 3V, in number
According to write phase, black state voltage 6V is written in voltage data signal, then has the saltus step of 0V or 3V to 6V on data line.Data line is in number
Shorter according to the time of write phase, it is not the 6V of black state to lead to the voltage of write-in data line, finally display panel is made to show
Dark-state is not dark.
Fig. 1 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention, as shown in Figure 1, the display device
100 include multiple pixel circuits 110；
It is connected to the multiple data lines 111 of multiple pixel circuits；
At least one multi-path choice unit 121, multi-path choice unit 121 include an input terminal and at least two outputs
End, each output end connection a data line 111；
Driving unit 130, the data line 111 for being electrically connected to multi-path choice unit 121 by multi-path choice unit 121
Charging, charging process includes pre-charging stage and data write phase, in input of the pre-charging stage to multi-path choice unit 121
It holds Vin to input pre-charge voltage, and is input to the input terminal Vin of multi-path choice unit 121 in the timesharing of data write phase
Few two voltage data signals, pre-charge voltage are associated with at least two voltage data signals, and pre-charge voltage is more than or equal to each
Minimum voltage in voltage data signal, and less than or equal to the maximum voltage in each voltage data signal.
Display panel includes several multi-path choice units 121, for a multi-path choice unit 121, multi-path choice unit
121 input terminal Vin timesharing is connected with each output end successively, and in a period, the input terminal Vin of multi-path choice unit 121 is only
It is connected with an output end, the voltage output of the input terminal Vin inputs of multi-path choice unit 121 should extremely be led with input terminal Vin
Logical output end, and then it is transmitted to the data line 111 of output end connection.One pixel circuit 110 connects a data line 111, number
It can be configured according to specific pixel arrangement according to the connection type of line 111 and pixel circuit 110, such as a row pixel circuit
110 connect with same data line 111.The number of the output end of multi-path choice unit can be configured according to practical application,
Such as it may include 2,3,4 or 6 output ends that multichannel, which chooses selecting unit,.As shown in Figure 1, data line D1, data line D2, data
Line D3 and data line D4 indicates the first column data line 111,111 third column data line 111 and the 4th of the second column data line row respectively
Data line 111.Multi-path choice unit in Fig. 1 includes two output ends, and specifically, multi-path choice unit 121 includes one defeated
Enter to hold Vin and two output end, respectively the first output end vo ut1 and second output terminal Vout2, first multi-path choice unit
121 the first output end vo ut1 and second output terminal Vout2 is separately connected data line D1 and data line D2, second multichannel choosing
The the first output end vo ut1 and second output terminal Vout2 for selecting unit 121 are separately connected data line D3 and data line D4.
Whether multi-path choice unit 121 further includes at least two control signal ends, for control signal Vin at least two
A output end realizes conducting.In general, the number phase of the number of control signal end and the output end of multi-path choice unit 121
Deng.It continues to refer to figure 1, each multi-path choice unit 121 includes two output end vos ut1 and Vout2, multi-path choice unit 121
Further include two control signal ends, respectively first control signal end CTRL1 and second control signal end CTRL2, for controlling
Whether input terminal Vin realizes with the first output end vo ut1 and second output terminal Vout2 is connected, to make the first output end vo ut1
The signal of output input Vin inputs is realized with second output terminal Vout2, the signal of first control signal end CTRL1 inputs can
It is switched on or off with control signal Vin and the first output end, such as first control signal end CTRL1 input low level signals
When, input terminal Vin is connected with the first output end, when the CTRL1 input high level signals of first control signal end, input terminal Vin with
First output end disconnects；Or when the CTRL1 input high level signals of first control signal end, input terminal Vin and the first output end
Conducting, when the CTRL1 input low level signals of first control signal end, input terminal Vin and the disconnection of the first output end.Correspondingly,
The signal of two control signal end CTRL2 inputs can be switched on or off with control signal Vin and second output terminal Vout2.
Driving unit 130 is electrically connected with multi-path choice unit 121, is realized to a plurality of data by multi-path choice unit 121
Line 111 charges.Fig. 2 is a kind of sequence diagram of display device course of work provided in an embodiment of the present invention, and Fig. 3 is implementation of the present invention
A kind of pixel circuit schematic diagram that example provides.As shown in figure 3, pixel circuit includes the first transistor T1, second transistor T2, drives
Dynamic transistor Tdr, the 4th transistor T4, the 5th transistor T5, the 6th transistor T6, the 7th transistor T7, storage capacitance Cst and
Light-emitting element E.The grid of the first transistor T1 is electrically connected with the grid of the 6th transistor T6 with luminous signal line EMIT, and first is brilliant
The first pole of body pipe T1 is electrically connected with first voltage line PVDD, second pole and driving transistor of second pole with second transistor T2
The first pole of Tdr is electrically connected；The grid of second transistor T2 is electrically connected with the second scan line SCAN2, the first pole and data line
VDATA is electrically connected；The second pole of the grid of driving transistor Tdr and the 5th transistor T5 and the first of storage capacitance Cst extremely electric
Connection, the second pole is electrically connected with the first pole of the second pole of the 4th transistor T4 and the 6th transistor T6；4th transistor T4's
Grid is electrically connected with the second scan line SCAN2, and the first pole is electrically connected with the first pole of storage capacitance Cst；5th transistor T5's
Grid is electrically connected with the first scan line SCAN1, and the first pole is electrically connected with reference voltage line VREF；The second pole of 6th transistor T6
It is electrically connected with the second pole of the anode of light-emitting element E and the 7th transistor T7, the grid and the second scan line of the 7th transistor T7
SCAN2 is electrically connected, and the first pole is electrically connected with reference voltage line VREF；The cathode of light-emitting element E is electrically connected with second voltage line PVEE
It connects.The course of work of pixel circuit 110 may include initial phase t1, data write phase t2 and luminescence display stage.It connects
Get off, is illustrated so that the first transistor T1 to the 7th transistor T7 is P-type transistor as an example provided in an embodiment of the present invention aobvious
Show the course of work of panel.As shown in Fig. 2, in initial phase t1, the first scan line SCAN1 input low levels, the 5th crystal
Pipe T5 is connected, the voltage Vref on N1 node input reference voltage lines VREF, on storage capacitance Cst storage first voltage lines PVDD
Voltage and reference voltage Vref difference, the grid of driving transistor Tdr is also reference voltage Vref；In data write phase
T2, the second scan line SCAN2 input low levels, second transistor T2, the 4th transistor T4 and the 7th transistor T7 conductings, storage
Capacitance Cst stores the associated voltage of threshold voltage with driving transistor Tdr, the voltage data signal on data line VDATA
Vdata writing pixel circuits, the first pole of the 6th transistor T6 is transmitted to by driving transistor Tdr；In the luminescence display stage,
Luminous signal line EMIT input low levels, the 6th transistor T6 conductings, driving transistor Tdr is according to the electricity on storage capacitance Cst
Pressure output driving current is transmitted to the anode of light-emitting element E by the 6th transistor T6, and driving light-emitting element E shines.
The number of writing pixel circuit is needed in order to which the voltage on data write phase t2 data lines VDATA quickly charges to
Further include to data before data line VDATA write-ins data voltage stage t2 after initial phase t1 according to signal voltage
The pre-charging stage t3 of line VDATA.As shown in Figure 1, Figure 2 and Figure 3, the data line VDATA in Fig. 3 is the data line in Fig. 1
111, therefore, a cycle T of the charging process of data line 111 may include pre-charging stage t3 and data write phase t4 and
t5.Illustrate so that the output end vo ut1 of multi-path choice unit 121 connects data line D1 and D2 with Vout2 as an example.In pre-charging stage
The signal of t3, the first control signal end CTRL1 inputs of multi-path choice unit 121 are low level (ctrl1), second control signal
It is low level (ctrl2) to hold the signal of CTRL2 inputs, and two output end vos ut1 and Vout2 are realized with input terminal Vin and are connected,
Multi-path choice unit 121 by the voltage signal pre of the input terminal Vin precharge inputted from output end vo ut1 and Vout2 export to
Data line D1 and D2 realize the precharge to data line D1 and D2.Before pre-charging stage t3, driving unit 121 obtains will
The voltage data signal vd1 and vd2 to be written to data line D1 and D2, and exported between voltage data signal by logical operation
Voltage (may include the voltage data signal being equal on data line D1 and D2) conduct between vd1 and voltage data signal vd2
Pre-charge voltage, by multi-path choice unit 121 to data line D1 and D2 into line precharge.Data write phase includes the t4 stages
With the t5 stages, wherein the t4 stages are the data write phases to data line D1, and the t5 stages are that rank is written to the data of data line D2
Section.In the t4 stages, the first control signal end CTRL1 of multi-path choice unit 121 is low level, output end vo ut1 and input terminal
Vin is connected, and the second control terminal CTRL2 is high level, and output end vo ut2 is disconnected with input terminal Vin, the number of input terminal Vin inputs
Data line D1 is transmitted to by output end vo ut1 according to signal voltage；In the t5 stages, the first control letter of multi-path choice unit 121
Number end CTRL1 is high level, and output end vo ut1 is connected with input terminal Vin, and the second control terminal CTRL2 is low level, output end
Vout2 is disconnected with input terminal Vin, and the voltage data signal of input terminal Vin inputs is transmitted to data line by output end vo ut2
D2.That is data-signal electricity of input terminal Vin input data lines from 130 timesharing of driving unit to multi-path choice unit 121 D1 and D2
Pressure is carried out by the pixel circuit that the output end vo ut1 of multi-path choice unit 121 and Vout2 couples are connect with data line D1 and D2
Data are written.In data write phase, multi-path choice unit 121 is general only to carry out the data line 111 of output end connection
Data are written.The initial voltage of data write phase t2 is pre-charge voltage pre, voltage data signal of the value in data line D1
Between the voltage data signal of data line D2, allow data line D1 and D2 data write phase t2 reduce data line D1 and
Voltage data signal on data line D1 and D2 is quickly charged to ideal potential, greatly shortens data line D1 by the cross-pressure of D2
With the charging time of D2, it is rapidly achieved voltage data signal.Therefore when the screen size of the display panel in display device 100 increases
Greatly, when the line frequency of display panel is smaller and smaller, data line 111 may be implemented in data write phase by adjusting pre-charge voltage
Charging is complete, to improve the display effect of charge efficiency and display panel.After the completion of data write phase t2, to data
The next line pixel circuit that line D1 is connected with D2 carries out charging process, repeats above-mentioned charging process.Repeating above-mentioned charging process
In, driving unit 121 obtains the voltage data signal that will be written on data line D1 and D2 again, will be filled with data line at this time
Voltage data signal on D1 and D2 may change, as the voltage data signal vd1 that will be filled on data line D1 and D2
When changing with vd2, the voltage signal pre of precharge is with voltage data signal vd1 and the vd2 change on data line D1 and D2
Change and change, voltage data signal vd1 of the value still on the voltage data signal and data line D2 on data line D1 with
Voltage (may include the voltage data signal being equal on data line D1 and D2) between vd2, so as to realize precharge electricity
Pressure pre is associated with the voltage data signal vd1 and vd2 on data line D1 and D2, is reduced data line D1 and D2 and is written in data
Voltage data signal on data line D1 and D2 is quickly charged to ideal potential by the cross-pressure of stage t2, to greatly shorten
The charging time of data line D1 and D2.
Illustratively, as shown in Figure 1, display panel provided in an embodiment of the present invention further includes multi-strip scanning line 112, scanning
Line G1, scan line G2, scan line G3 and scan line G4 indicate the first horizontal scanning line 112, the second horizontal scanning line 112, third respectively
Horizontal scanning line 112 and fourth line scan line 112.When will be write to the pixel circuit of data line D1 and the first horizontal scanning line G1 connections
The voltage data signal entered is 6V, the voltage data signal that the pixel circuit of data line D2 and the first horizontal scanning line G1 connections is written
For 5V, then in the course of work for the pixel circuit being connect with the first horizontal scanning line G1, when pre-charging stage t3, driving unit
130 obtain two voltage data signals that will be written to data line D1 and D2, respectively 6V and 5V, then driving unit 130 is defeated
The pre pairs of pixel circuit being connect with the first horizontal scanning line G1 of pre-charge voltage signal gone out more than or equal to 5V and less than or equal to 6V is pre-
Charging.The cross-pressure of two voltage data signals of 5V and 6V is compared in data write phase t2, pre-charge voltage signal pre
It is small, ideal potential is quickly charged to data line D1 and D2 so as to realize, greatly shortens filling for data line D1 and D2
The electric time, and it is complete to charge.When the data that will be written to data line D1 and the pixel circuit of the second horizontal scanning line G2 connections
Signal voltage is 4V, when the voltage data signal of the pixel circuit write-in of data line D2 and the second horizontal scanning line G2 connections is 3V,
Complete with after the charging process of the first horizontal scanning line G1 pixel circuits connecting, into the picture being connect with next horizontal scanning line G2
The pre-charging stage of plain circuit, driving unit 130 obtain the two data-signal electricity that will be written to data line D1 and D2 again
Pressure, respectively 4V and 3V, the then output of driving unit 130 are more than or equal to 3V and are less than or equal to the pre-charge voltage pair and the second row of 4V
The pixel circuit of scan line G2 connections is pre-charged.In data write phase, pre-charge voltage is to two data-signal electricity of 3V and 4V
The cross-pressure of pressure is smaller, and ideal potential is quickly charged to data line D1 and D2 so as to realize.It is possible thereby to dynamic
Pre-charge voltage is adjusted, data line 111 is reduced in the cross-pressure of data write phase, quickly believes the data on data line 111
Number voltage is charged to ideal potential, and the screen size of the display panel in display device 100 increases, and the line frequency of display panel is more next
More hour realizes that data line 111 is complete in the charging of data write phase, to realize high-res, improve charge efficiency and
Display effect.
The technical solution of the present embodiment, by pre-charging stage, driving unit is by multi-path choice unit to data line
Input with the associated pre-charge voltage of voltage data signal, reduce data line data write phase cross-pressure；It is write in data
Enter the stage, the voltage on data line is quickly charged to target voltage by multi-path choice unit, greatly shortened by driving unit
The charging time of data line.Therefore when the screen size of the display panel in display device increases, the line frequency of display panel is more next
More hour may be implemented data line by adjusting pre-charge voltage and charge completely, to realize high parsing in data write phase
Degree, improves charge efficiency and display effect.
Based on the above technical solution, optionally, pre-charge voltage is equal to the minimum electricity in each voltage data signal
Pressure.When select the minimum voltage in each voltage data signal for pre-charge voltage when, can be to avoid because pre- in data write phase
The problem of charging voltage is more than voltage data signal, and the pixel circuit being electrically connected with data line is write not into voltage data signal.
Illustratively, the data-signal electricity that will be written to data line D1 and the pixel circuit of the first horizontal scanning line G1 connections
Pressure is 6V, and the voltage data signal that will be written to data line D2 and the pixel circuit of the first horizontal scanning line G1 connections is 5V, then
In the pixel circuit course of work being connect with the first horizontal scanning line G1, when pre-charging stage t3, the acquisition of driving unit 130 will
Two voltage data signals being written to data line D1 and D2, respectively 6V and 5V, then the comparator output in driving unit 130
5V is as pre-charge voltage.When pre-charge voltage is more than 5V, the pixel circuit of data line D2 and the first horizontal scanning line G1 connections
The voltage data signal (5V) of write-in is less than pre-charge voltage, therefore the data-signal in data write phase, data line D2
Voltage 5V cannot be written in the pixel circuit being electrically connected with data line D2, and the pixel circuit being electrically connected with data line D2 is caused to show
Abnormal phenomenon.
Based on the above technical solution, driving unit 130 may include comparator, and comparator exports each data-signal
Minimum voltage in voltage is as pre-charge voltage.
Illustratively, it continues to refer to figure 1, the acquisition of driving unit 130 will be to the data being connect with multi-path choice unit 121
The voltage data signal being written on line D1 and D2, and be input to comparator, comparator is to will be on data line D1 and D2
The voltage data signal of write-in carries out logical operation, and the minimum voltage in voltage data signal on output data line D1 and D2 is made
It is exported to the input terminal Vin of multichannel selecting unit 121, two control signal ends of multi-path choice unit 121 for pre-charge voltage
CTRL1 and CTRL2 control the pre-charge voltages of two output end vo ut1 and Vout2 output input Vin inputs to data line D1
And D2, to data line D1 and D2 into line precharge.
Optionally, pre-charge voltage is equal to the average value of each voltage data signal.In data write phase, if each data
Signal voltage difference is bigger, can be big to avoid the difference comparsion of pre-charge voltage and each voltage data signal, causes cross-line electric
Press larger problem, and when select the average value in each voltage data signal as pre-charge voltage, pre-charge voltage and will
The difference for being filled with each voltage data signal of data line will not be very big, so as to avoid the display effect of pixel circuit is influenced.
Illustratively, the data-signal electricity that will be written to data line D1 and the pixel circuit of the first horizontal scanning line G1 connections
Pressure is 6V, and the voltage data signal that will be written to data line D2 and the pixel circuit of the first horizontal scanning line G1 connections is 3V, then
It is connect in the pixel circuit course of work with the first horizontal scanning line G1, when pre-charging stage, the acquisition of driving unit 130 will be to number
According to two voltage data signals of line D1 and D2 write-in, respectively 6V and 3V are written if pre-charge voltage is selected as 3V in data
Stage leads to the electricity of writing pixel circuit in the presence of the voltage jump from 3V to 6V when voltage data signal 6V is written in data line D1
Pressure cannot reach 6V.When using the average value of data line two voltage data signals of D1 and D2, pre-charge voltage 4.5V,
The difference that pre-charge voltage and each voltage data signal can then be reduced, avoids the occurrence of that cross-line voltage is big, the saltus step of voltage
Problem, to make pixel circuit show expected grayscale.
Fig. 4 is a kind of structural schematic diagram of multi-path choice unit provided in an embodiment of the present invention, as shown in figure 4, multichannel is selected
It includes at least two the first transistors to select unit 121；The grid of at least two the first transistors connects one to one at least two
First pole of the first clock cable, at least two the first transistors is connected to the input terminal Vin of multi-path choice unit 121,
Second pole of at least two the first transistors is respectively connected at least two output ends of multi-path choice unit.It is shown in Fig. 4 more
Road selecting unit 121 includes 2 first switch transistors, respectively first first switch transistor M1-1 and second first
Switching transistor M1-2.The first pole of first first switch transistor M1-1 and second first switch transistor M1-2 with it is defeated
Enter Vin is held to be electrically connected, the second pole is electrically connected with output end vo ut1 and Vout2 respectively, first first switch transistor M1-1 and
The grid of second first switch transistor M1-2 by the control signal end of multi-path choice unit 121 respectively with first first
Clock cable CLK1 and the CLK2 electrical connections of the first clock cable of Article 2.With continued reference to Fig. 2, it is with first switch transistor
For P-type transistor, when first the first clock cable CLK1 is low level, first first switch transistor M1-1 is led
Logical, output end vo ut1 and input terminal Vin realizes conducting connection, and first first switch transistor M1-1 is by multi-path choice unit
The voltage of 121 input terminal Vin is delivered to output end vo ut1；When the first clock cable of Article 2 CLK2 is low level, the
Two first switch transistor M1-2 conductings, output end vo ut2 and input terminal Vin realize conducting connection, second first switch
The voltage of the input terminal Vin of multi-path choice unit 121 is delivered to output end vo ut2 by transistor M1-2.Therefore it can pass through tune
Save two first clock cables CLK1 and CLK2 timing control multi-path choice unit 121 two output end vo ut1 and
Whether Vout2 realizes with input terminal Vin is connected.
It should be noted that the quantity of the first transistor can be more than 2 in multi-path choice unit, the quantity of the first transistor
Generally corresponded with the output end of multi-path choice unit.First switch transistor can also be N-type transistor, and corresponding first
Clock cable is connected when being high level, and the voltage of the input terminal Vin of multi-path choice unit 121 is delivered to output end.
Based on the above technical solution, with continued reference to Fig. 2, as depicted in figs. 1 and 2, which further includes
With the multi-strip scanning line 112 of 111 cross arrangement of data line；The signal on signal and the first clock cable in scan line 112
Include multiple pulses；Pulse in scan line covers the arteries and veins of at least data write phase on each first clock cable
Punching.
Multi-strip scanning line 112 be electrically connected with often capable pixel circuit one-to-one correspondence, for exporting scanning signal one by one to right
The pixel circuit answered.Equally using the first switch transistor in multi-path choice unit as P-type transistor, and multi-path choice unit packet
It includes and illustrates for two input terminals, as shown in Fig. 2, the pulse (such as t2 stages) in scan line 112 covers two first
The pulse of data write phase (including t4 stages and t5 stages) on clock cable CLK1 and CLK2.I.e. to data micro USB electricity
Data write-in is carried out to pixel circuit in the process, sweep time can be saved.
Another embodiment arranged side by side with above-mentioned technical proposal, Fig. 5 is in a kind of scan line provided in an embodiment of the present invention
Pulse and the first clock cable on pulse sequence diagram, as shown in Figure 1 and Figure 5, which further includes and number
According to the multi-strip scanning line 112 of 111 cross arrangement of line；The signal on signal and the first clock cable in scan line 112 wraps
Include multiple pulses；After the pulse of data write phase of the pulse on the first clock cable on scan signal line.Exist
Data write-in is carried out to pixel circuit after being completed to data micro USB electricity.
As shown in figure 5, equally using the first switch transistor in multi-path choice unit as P-type transistor, and multi-path choice
Unit for two input terminals including illustrating, and the pulse (t6 stages) in scan line 112 is in two the first clock cables
After the pulse (including t2 stages and t3 stages) of data write phase on CLK1 and CLK2.
The embodiment of the present invention also provides a kind of driving method of display device, and Fig. 6 is one kind provided in an embodiment of the present invention
The flow chart of the driving method of display device.Driving method provided in an embodiment of the present invention is needed provided in an embodiment of the present invention
It is completed in display device, which includes：
Multiple pixel circuits；
It is connected to the multiple data lines of multiple pixel circuits；
At least one multi-path choice unit, multi-path choice unit include an input terminal and at least two output ends, each
Output end connects a data line.
As shown in fig. 6, the driving method includes：
S610, pre-charging stage input pre-charge voltage to the input terminal of multi-path choice unit.
Specifically, in pre-charging stage, driving unit acquisition will be write to the data line being electrically connected with multi-path choice unit
The voltage data signal entered exports pre-charge voltage to the input terminal of multi-path choice unit, multi-path choice list by logical operation
At least two output ends output pre-charge voltage of member is to data line, to data line into line precharge, such as can be by comparing
Device exports pre-charge voltage.Illustratively, driving unit acquisition will be written on the data line being connect with multi-path choice unit
Voltage data signal, and be input to comparator, comparator to the voltage data signal that will be written on data line into
Row logical operation exports voltage associated with the voltage data signal on data line and is exported to multichannel choosing as pre-charge voltage
The input terminal of unit is selected, the control signal end of multi-path choice unit controls the preliminary filling of at least two output end output inputs input
Piezoelectric voltage is to data line, to data line into line precharge.Optionally, comparator exports the minimum voltage in each voltage data signal
As pre-charge voltage.Alternatively, comparator exports the average value of each voltage data signal as pre-charge voltage.
S620, data write phase input at least two voltage data signals to the input terminal timesharing of multi-path choice unit；
Wherein, pre-charge voltage is associated with at least two voltage data signals, and pre-charge voltage is more than or equal in each voltage data signal
Minimum voltage, and less than or equal to the maximum voltage in each voltage data signal.
Specifically, in data write phase, at least two output end of control and input terminal of multi-path choice unit timesharing are real
It is now connected, and the outputting data signals voltage of timesharing to the data line being electrically connected with output end carries out data write-in.It is write in data
Enter the stage, at least two output ends in multi-path choice unit in the same time only there are one in being connected with input terminal, other
Output end be in and be not turned on input terminal.
In addition, the pre-charge voltage in pre-charging stage is related to the voltage data signal on each data line, precharge electricity
Press between the voltage data signal on each data line (may include being equal to data-signal minimum and maximum on each data line
Voltage), therefore in data write phase, each data line can reduce the cross-pressure for being charged to voltage data signal, quickly by each number
It is charged to voltage data signal according to the voltage on line, greatly shortens the charging time of data line D1 and D2.Therefore when display dress
The screen size of display panel in setting increases, can be with by adjusting pre-charge voltage when the line frequency of display panel is smaller and smaller
It realizes that data line is complete in the charging of data write phase, to realize high-res, improves charge efficiency and display effect.
The technical solution of the present embodiment, by pre-charging stage, driving unit is by multi-path choice unit to data line
Input with the associated pre-charge voltage of voltage data signal, reduce data line data write phase cross-pressure；It is write in data
Enter the stage, the voltage data signal on data line is quickly quickly charged to data-signal by driving unit by multi-path choice unit
Voltage greatly shortens the charging time of data line.Therefore it when the screen size increase of the display panel in display device, shows
When showing that the line frequency of panel is smaller and smaller, data line may be implemented by adjusting pre-charge voltage and charged in data write phase
Entirely, to realize high-res, charge efficiency and display effect are improved.
On the basis of the above embodiments, optionally, pre-charge voltage is equal to the minimum value in each voltage data signal.When
Select the minimum voltage in each voltage data signal for pre-charge voltage when, can be to avoid because of precharge in data write phase
Voltage causes voltage data signal more than voltage data signal, and the pixel circuit being electrically connected with data line is write not into data-signal electricity
The problem of pressure.
The optional embodiment of another kind of above-described embodiment, pre-charge voltage are equal to being averaged for each voltage data signal
Value.When selecting the average value in each voltage data signal as pre-charge voltage, in data write phase, if each data are believed
Number voltage phase difference is bigger, can be big to avoid the difference comparsion of pre-charge voltage and each voltage data signal, leads to cross-line voltage
Larger problem, so as to avoid the display effect of pixel circuit is influenced.
With continued reference to Fig. 4, multi-path choice unit 121 includes at least two the first transistors；At least two the first transistors
Grid connect one to one at least two the first clock cables, the first pole of at least two the first transistors is connected to more
The input terminal Vin of road selecting unit 121, the second pole of at least two the first transistors are respectively connected to multi-path choice unit extremely
Few two output ends.
On the basis of above-mentioned multi-path choice unit, in pre-charging stage, to each first clock cable output clock letter
Number, control each the first transistor conducting.
In data write phase, clock signal is exported to the first clock cable one by one, controls each the first transistor successively
Conducting, during each the first transistor conducting, driving unit exports a voltage data signal.
Wherein, when the first transistor in multi-path choice unit is connected, other first in the multi-path choice unit are brilliant
Body pipe ends.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (12)
1. a kind of display device, which is characterized in that including：
Multiple pixel circuits；
It is connected to the multiple data lines of the multiple pixel circuit；
At least one multi-path choice unit, the multi-path choice unit include an input terminal and at least two output ends, each
The output end connects a data line；
Driving unit, the data micro USB for being electrically connected to the multi-path choice unit by the multi-path choice unit
Electricity, the charging process include pre-charging stage and data write phase, in the pre-charging stage to the multi-path choice list
The input terminal of member inputs pre-charge voltage, and in the data write phase timesharing to the input terminal of the multi-path choice unit
At least two voltage data signals are inputted, the pre-charge voltage is associated with described at least two voltage data signals, institute
Pre-charge voltage is stated more than or equal to the minimum voltage in each voltage data signal, and less than or equal to each data-signal electricity
Maximum voltage in pressure.
2. display device according to claim 1, which is characterized in that the pre-charge voltage is equal to each data-signal
Minimum voltage in voltage.
3. display device according to claim 2, which is characterized in that the driving unit includes comparator, the comparison
Device exports the minimum voltage in each voltage data signal as the pre-charge voltage.
4. display device according to claim 1, which is characterized in that the pre-charge voltage is equal to each data-signal
The average value of voltage.
5. display device according to claim 1, which is characterized in that the multi-path choice unit includes at least two first
Transistor；The grid of at least two the first transistor connects one to one at least two the first clock cables, it is described extremely
First pole of few two the first transistors is connected to the input terminal of the multi-path choice unit, at least two first crystal
Second pole of pipe is respectively connected at least two output ends of the multi-path choice unit.
6. display device according to claim 5, which is characterized in that further include a plurality of with the data line cross arrangement
Scan line；The signal on signal and first clock cable in the scan line includes multiple pulses；
The arteries and veins of at least described data write phase on each first clock cable of pulse covering in the scan line
Punching.
7. display device according to claim 5, which is characterized in that further include a plurality of with the data line cross arrangement
Scan line；The signal on signal and first clock cable in the scan line includes multiple pulses；
After the pulse of the data write phase of the pulse on first clock cable on the scan signal line.
8. a kind of driving method of display device, which is characterized in that the display device includes：
Multiple pixel circuits；
It is connected to the multiple data lines of the multiple pixel circuit；
At least one multi-path choice unit, the multi-path choice unit include an input terminal and at least two output ends, each
The output end connects a data line；
The driving method includes：
Pre-charging stage inputs pre-charge voltage to the input terminal of the multi-path choice unit；
Data write phase inputs at least two voltage data signals to the input terminal timesharing of the multi-path choice unit；Wherein,
The pre-charge voltage is associated with at least two voltage data signal, and the pre-charge voltage is more than or equal to each data
Minimum voltage in signal voltage, and less than or equal to the maximum voltage in each voltage data signal.
9. driving method according to claim 8, which is characterized in that the pre-charge voltage is equal to each data-signal
Minimum value in voltage.
10. driving method according to claim 8, which is characterized in that the pre-charge voltage is equal to each data letter
The average value of number voltage.
11. driving method according to claim 8, which is characterized in that the multi-path choice unit includes at least two the
One transistor；The grid of at least two the first transistor is separately connected at least two the first clock cables, it is described at least
First pole of two the first transistors is connected to the input terminal of the multi-path choice unit, at least two the first transistor
The second pole be respectively connected at least two output ends of the multi-path choice unit；
In the pre-charging stage, clock signal is exported to each first clock cable, controls each the first transistor
Conducting；
In the data write phase, clock signal is exported to first clock cable one by one, control each described first is brilliant
Body pipe sequentially turns on, and during each the first transistor conducting, the driving unit exports a voltage data signal；
Wherein, when the first transistor in the multi-path choice unit is connected, other institutes in the multi-path choice unit
State the first transistor cut-off.
12. driving method according to claim 8, which is characterized in that the pixel circuit further includes driving transistor, deposits
Storing up electricity holds and light-emitting component；The driving method further includes glow phase；
In the data write phase, the described and driving transistor associated voltage of threshold voltage is by the storage capacitance
Storage；
In the glow phase, the driving transistor drives the hair according to the voltage output driving current of the storage capacitance
Optical element shines.
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