CN109801594A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN109801594A CN109801594A CN201711144711.6A CN201711144711A CN109801594A CN 109801594 A CN109801594 A CN 109801594A CN 201711144711 A CN201711144711 A CN 201711144711A CN 109801594 A CN109801594 A CN 109801594A
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Abstract
The invention discloses a kind of display panel and display devices.Multiple selector in the display panel is used to export the scanning signal stage in the scan line, and the data-signal that input terminal inputs is transmitted to it one by one and is electrically connected the data line, to charge to the storage capacitance in the corresponding pixel circuit.The capacitance that the present invention passes through the storage capacitance in the change corresponding pixel circuit of pixel luminous when a scan line exports scanning signal, the capacitance of the storage capacitance in the pixel circuit being formerly electrically charged is set to be greater than the capacitance of the storage capacitance in the pixel circuit being electrically charged after, solve the storage voltage different problems made because of the voltage of the parasitic capacitance storage on data line to the storage capacitance charging in pixel circuit in the storage capacitance in the corresponding pixel circuit of pixel to shine when same scan line output scanning signal, improve the homogeneity of the brightness of OLED display panel, and improve the yield of OLED display panel.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of display panel and display devices.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display is had using very thin
Machine film layer and glass substrate, when a current passes through, organic material will shine.Therefore OLED display can be saved significantly
Electric energy is saved, can be made lighter and thinner.
On oled panel other than Organic Light Emitting Diode, it is also necessary to which the picture of the condition of offer can be persistently provided for OLED
Plain circuit usually has in pixel circuit a capacitor to be used to the data voltage of storing data line transmission.It is scanned when scan line exports
When signal, storage capacitance is written in data voltage by data line.With the increase of screen size and the need of high-definition display device
It asks, inevitably brings the increase of data lead and driving chip.In order to reduce number of leads, multiple selector is generallyd use
Solve the problems, such as that data lead is excessive.
When there is multiple selector in display panel, multiple selector has multiple output ends, and each output end connects one
Data line.When scan line is opened, data line charges to storage capacitance, and there are parasitic capacitance on data line, therefore data line
When corresponding output end no longer provides data voltage, the voltage that parasitic capacitance stores on data line still can be in pixel circuit
Storage capacitance charging, the output end for the causing multiple selector different corresponding pixel circuit charging time is different, in storage capacitance
Storage voltage it is also different, cause the brightness for driving OLED luminous different, homogeneity is deteriorated.
Summary of the invention
The present invention provides a kind of display panel and display device, to solve to cause because of the parasitic capacitance on data line to not
Storage capacitance charging time inconsistence problems in same pixel circuit, improve the homogeneity of the brightness of OLED display panel,
And improve the yield of OLED display panel.
In a first aspect, the embodiment of the invention provides a kind of display panel, which includes:
The multi-strip scanning line extend in a first direction, arranged in a second direction；Extend along the second direction, along described the
The multiple data lines of one direction arrangement；Wherein, the first direction and second direction intersection；The a plurality of scan line and more
Data line described in item limits multiple pixels, and each pixel includes a pixel circuit；The pixel circuit includes at least one
A storage capacitance, first switch transistor, driving transistor and light-emitting component, the driving transistor is for providing driving current
The light-emitting component is driven to shine, shown first switch transistor is used for will be on the corresponding data line of the pixel circuit
The first pole of the storage capacitance is written in voltage data signal, and the storage capacitance is used to keep the grid of the driving transistor
Voltage；The a plurality of scan line is for output scanning signal one by one to the corresponding pixel circuit；
Multiple selector, the multiple selector include multiple multi-path choice units, each multi-path choice unit packet
An input terminal and n output end are included, each output end is electrically connected by a data line with the corresponding pixel circuit
It connects, for exporting the scanning signal stage in the scan line, the data-signal that input terminal inputs is transmitted to its electrical connection one by one
The data line, to charge to the storage capacitance in the corresponding pixel circuit；Wherein n is just whole more than or equal to 2
Number；
Wherein, scan line described in any bar exports scanning signal stage, depositing in the pixel circuit being formerly electrically charged
The capacitance that storage is held is greater than the capacitance of the storage capacitance in the pixel circuit being electrically charged after.
Further, the multi-path choice unit, further includes:
N second switch transistor, the first of the n second switch transistor extremely with the multi-path choice unit
Input terminal electrical connection, the second pole of the n second switch transistor are electric with n output end of the multi-path choice unit respectively
Connection, the grid of the n second switch transistor are electrically connected with first to n control signal wire respectively.
Further, in pixel circuit corresponding to the second switch transistor of same control signal wire electrical connection
Storage capacitance capacitance it is equal.
Further, within a scanning signal period, first to control signal wire described in nth is sequentially output pulse letter
Number, first to the n-th second switch transistor sequentially turns on.
Further, the first pole of the storage capacitance is electrically connected with the grid of the driving transistor, the storage electricity
The second pole held is for inputting fixed level signal；
The scan line electrical connection corresponding with the pixel circuit of the grid of the second switch transistor, is used for institute
State the first pole that the storage capacitance is written in the voltage data signal on the corresponding data line of pixel circuit.
Further, the display panel further includes LED control signal line, the first power supply voltage signal line and the second electricity
Source voltage signal line；The pixel circuit further include: third switching transistor, the 4th switching transistor and the 5th switch crystal
Pipe；
The data line electrical connection corresponding with the pixel circuit of first pole of the first switch transistor, the second pole
Be electrically connected with the second pole of the first pole of the driving transistor and the 5th switching transistor and grid and the scanning
Line electrical connection；
Second pole of the driving transistor and the first pole of the third switching transistor and the 4th switch crystal
Second pole of pipe be electrically connected and the first pole of grid and the 4th switching transistor and the storage capacitance it is second extremely electric
Connection；
The grid of 4th switching transistor is electrically connected with the scan line；
The of first pole of the 5th switching transistor and the first power supply voltage signal line and the storage capacitance
The electrical connection of one pole and grid are electrically connected with the LED control signal line；
Second pole of the third switching transistor be electrically connected with the first pole of the light-emitting component and grid with it is described
The electrical connection of LED control signal line；
Second pole of the light-emitting component is electrically connected with the second source voltage signal line.
Further, the first switch transistor to the 5th switching transistor and the driving transistor is p-type
Transistor.
Further, there are parasitic capacitances on the data line.
Further, equal with the capacitance of storage capacitance in the pixel circuit of same data line electrical connection.
Further, it in a frame of display, is electrically connected with the data line of the data-signal of transmission same size
The variance rate of the different pixel circuits, the charging voltage of storage capacitance is less than or equal to 2%.
Second aspect, the embodiment of the invention also provides a kind of display device, which includes that the present invention is any real
The display panel of example offer is provided.
The present invention is by changing in the corresponding pixel circuit of pixel luminous when a scan line exports scanning signal
The capacitance of storage capacitance makes the capacitance of the storage capacitance in the pixel circuit being formerly electrically charged be greater than the picture being electrically charged after
The capacitance of storage capacitance in plain circuit solves the voltage because of the parasitic capacitance storage on data line in pixel circuit
Storage capacitance charging makes in the storage capacitance in the corresponding pixel circuit of pixel to shine when same scan line output scanning signal
Storage voltage different problems, improve the homogeneity of the brightness of OLED display panel, and improve OLED display panel
Yield.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.
Fig. 2 is a kind of circuit diagram of pixel circuit provided in an embodiment of the present invention.
Fig. 3 is the effect diagram of the storage capacitance charging in different pixels circuit in the prior art.
Fig. 4 is the effect diagram of the storage capacitance charging in a kind of different pixels circuit provided in an embodiment of the present invention.
Fig. 5 is a kind of structural schematic diagram of multiple selector provided in an embodiment of the present invention
Fig. 6 is the control signal wire and pixel circuit of the multiple selector in display panel provided in an embodiment of the present invention
The timing diagram of scan line.
Fig. 7 is the circuit diagram of another pixel circuit of display panel provided in an embodiment of the present invention.
Fig. 8 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
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 limiting 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.
Fig. 1 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention, and Fig. 2 provides for the embodiment of the present invention
A kind of pixel circuit circuit diagram, be applicable in display panel shown in FIG. 1.The present embodiment can solve display panel and shine
Non-uniform problem, with reference to Fig. 1 and Fig. 2, which includes:
Extend along first direction x, the multi-strip scanning line 112 of y arrangement in a second direction；Y extends, along first in a second direction
The multiple data lines 111 of direction x arrangement；Wherein, first direction x and second direction y intersection；Multi-strip scanning line 112 and a plurality of number
Multiple pixels are limited according to line 111, each pixel includes a pixel circuit；Each pixel circuit includes at least one storage electricity
Hold Cst, first switch transistor M1, driving transistor Mdr and light-emitting element E 1, driving transistor Mdr is for providing driving electricity
Stream driving light-emitting element E 1 shines, and first switch transistor M1 is used to believe the data on the corresponding data line 111 of pixel circuit
The first pole of number voltage write-in storage capacitance Cst；Storage capacitance Cst is used to keep the grid voltage of driving transistor Mdr；It is a plurality of
Scan line 112 is for output scanning signal one by one to corresponding pixel circuit.Wherein, the corresponding data line of pixel circuit is the picture
The data line that plain circuit is electrically connected；The scan line that the corresponding scan line of pixel circuit is electrically connected for the pixel circuit.For example,
Every a line pixel circuit is electrically connected with a horizontal scanning line, and each column pixel circuit is electrically connected with a column data line.
Multiple selector, multiple selector include multiple multi-path choice units 121, and each multi-path choice unit 121 includes
One input terminal Vin and n output end, each output end are electrically connected with corresponding pixel circuit by a data line 111, are used
In exporting the scanning signal stage in scan line 112, the data-signal that input terminal Vin is inputted is transmitted to it one by one and is electrically connected data
Line 111, to charge to the storage capacitance Cst in corresponding pixel circuit；Wherein n is the positive integer more than or equal to 2；
Wherein, any bar scan line 112 exports scanning signal stage, the storage capacitance in pixel circuit being formerly electrically charged
The capacitance of Cst is greater than the capacitance of the storage capacitance Cst in the pixel circuit being electrically charged after.
As shown in Figure 1, data line D1, data line D2, data line D3 and data line D4 respectively indicate the first column data line
111, the second column data line 111, third column data line 111 and the 4th column data line 111.Scan line G1, scan line G2, scan line
G3 and scan line G4 respectively indicates the first horizontal scanning line 112, the second horizontal scanning line 112, third horizontal scanning line 112 and fourth line and sweeps
Retouch line 112., to corresponding pixel circuit, scan line G1 as shown in figure 1 is defeated for output scanning signal one by one for multi-strip scanning line 112
Pixel circuit of the scanning signal into pixel 11-14 out, the i.e. corresponding pixel circuit with one-row pixels, G2 export scanning signal extremely
Pixel circuit in pixel 21-24, and so on.
In display panel, n output end of multi-path choice unit 121 passes through n data line 111 and n column pixel one by one
Corresponding electrical connection.As shown in Figure 1, there are two output ends, respectively the first output end vo ut1 and second for multi-path choice unit 121
Output end vo ut2 is electrically connected by corresponding data line 111 with the first output end vo ut1 of multi-path choice output unit 121
Pixel (pixel 11, pixel 21, pixel 31, pixel 41 ...) be P1 class pixel, pass through corresponding data line 111 and selected with multichannel
Select output unit 121 second output terminal Vout2 electrical connection pixel (pixel 12, pixel 22, pixel 32, pixel 42 ...)
For P2 class pixel.The corresponding pixel circuit of P1 class pixel image element circuit structure corresponding with P2 is identical, the difference is that P1 class pixel
The capacitance of the storage capacitance Cst in the corresponding pixel circuit of storage capacitance Cst and P2 class pixel in corresponding pixel circuit
It is different.
It include multiple multi-path choice units 121, multiple output ends of each multi-path choice unit 121 in multiple selector
Can be electrically connected with P1 to Pn class pixel, as shown in Figure 1, each multi-path choice unit 121 is there are two output end, respectively with
It is electrically connected including P1 class pixel and P2 class pixel.
As shown in Figure 1, it is assumed that P1 class pixel is first electrically charged, and is electrically charged after P2 class pixel, then the corresponding pixel of P1 class pixel
The capacitance of storage capacitance Cst in circuit is greater than the capacitance of the storage capacitance Cst in the corresponding pixel circuit of P2 class pixel.
In the present invention, being the storage capacitance Cst charging in the corresponding pixel circuit of pixel is indicated to pixel charging.Fig. 3 is existing
There is the effect diagram of the storage capacitance charging in technology in different pixels circuit, Fig. 4 is one kind provided in an embodiment of the present invention
The effect diagram of storage capacitance charging in different pixels circuit.Wherein, the charging curve in Fig. 3 can correspond to P1 and P2 class picture
The equal situation of the capacitance of storage capacitance Cst in element in pixel circuit, it is corresponding that the charging curve in Fig. 4 corresponds to P1 class pixel
Pixel circuit (pixel circuit that P1 class pixel includes) in storage capacitance Cst capacitance be greater than the corresponding picture of P2 class pixel
The case where capacitance of storage capacitance Cst in plain circuit.When the wherein output scanning letter of scan line 112 in display panel
When number to the corresponding pixel circuit, scan line G1 output scanning signal as shown in figure 1 is corresponding to pixel 11 and pixel 12
When in pixel circuit, the data-signal of input terminal Vin is transmitted to the data line of its electrical connection by multi-path choice unit 121 one by one
111, i.e. data-signal is successively transmitted to the electricity of the pixel in pixel 11 and 2 by data line D1 and D2 by multi-path choice unit 121
Road receives the voltage data signal on data line D1 and D2 in the corresponding pixel circuit of pixel 11 and 12 respectively.Pixel 11 and 12
First switch transistor M1 conducting in corresponding pixel circuit, by the voltage data signal in respective data lines 111 after conducting
The first pole of storage capacitance Cst is written.Storage voltage on storage capacitance Cst makes that transistor Mdr is driven to generate driving current, drives
Streaming current drives light-emitting element E 1 to shine.Assuming that multi-path choice unit 121 first passes through data line D1 to (the i.e. P1 class picture of pixel 11
Element) corresponding pixel circuit transmits voltage data signal, and after a certain period of time, output is closed to the access on data line D1, is stopped
Voltage data signal is written to pixel 11, then the corresponding pixel circuit of pixel 12 (i.e. P2 class pixel) is transmitted by data line D2
Voltage data signal, multi-path choice unit 121 transmit voltage data signal by 111 pairs of electrical connection pixel circuits of every data line
Time it is identical.When multi-path choice unit 121 stops to the write-in voltage data signal of pixel 11 starting that data are written to pixel 12
When signal voltage, due to the influence of the parasitic capacitance on data line D1, it is right to pixel 11 that the voltage stored on data line D1 continues
Storage capacitance Cst charging in the pixel circuit answered, therefore the charging of the storage capacitance Cst in the corresponding pixel circuit of pixel 11
Time is greater than the charging time of the storage capacitance Cst in the corresponding pixel circuit of pixel 12.When pixel 11 (P1 class pixel) is corresponding
Pixel circuit in storage capacitance Cst capacitance be equal to pixel 12 (P2 class pixel) corresponding pixel circuit in storage electricity
When holding the capacitance of Cst, as shown in figure 3, curve P1-3 is the charging curve of P1 class pixel, curve P2-3 is filling for P2 class pixel
Electric curve.Due to the storage capacitance Cst's in pixel 11 (P1 class pixel) and the corresponding pixel circuit of pixel 12 (P2 class pixel)
Capacitance is equal, and charging rate is identical, when the voltage data signal for being supplied to data line D1 and data line D2 is equal, pixel 11
Voltage after the charging of storage capacitance Cst in (P1 class pixel) corresponding pixel circuit will be greater than pixel 12 (P2 class pixel)
Voltage after the charging of storage capacitance Cst in corresponding pixel circuit.The non-uniform phenomenon of display will be will appear.Such as Fig. 4 institute
Show, curve P1-4 is the charging curve of P1 class pixel, and curve P2-4 is the charging curve of P2 class pixel.Pixel 11 (P1 class pixel)
The capacitance of storage capacitance Cst in corresponding pixel circuit is greater than depositing in pixel 12 (P2 class pixel) corresponding pixel circuit
Storage holds the capacitance of Cst, although the parasitic capacitance on D1 line makes data line D1 to the storage in the pixel circuit in pixel 11
The charging time of capacitor is long, but the storage capacitance Cst charging in the corresponding pixel circuit of pixel 12 (P2 class pixel) is fast, when mentioning
When the voltage data signal of supply data line D1 and data line D2 is equal, finally make pixel 11 (P1 class pixel) and pixel 12
The charging voltage of storage capacitance Cst in (P2 class pixel) corresponding pixel circuit is identical.It solves due to posting on data line
Raw capacitor, causes to show display panel uniform storage capacitance charging time inconsistence problems in different pixel circuits,
The homogeneity of the brightness of OLED display panel is improved, and improves the yield of OLED display panel.
It should be noted that between the capacitance of the storage capacitance Cst in the corresponding pixel circuit of different types of pixel
Size relation, can according to the charging time and drive transistor I-E characteristic simulate determine.
In embodiments of the present invention, light-emitting element E 1 meet the present invention under conditions of can there are many selection, the present invention
In light-emitting element E 1 be Organic Light Emitting Diode.
The technical solution of the present embodiment, multiple output ends of the multi-path choice unit in display panel in multiple selector with
Multiple data lines electrical connection makes the pixel circuit being formerly electrically charged by changing the capacitance of the storage capacitance in pixel circuit
In the capacitance of storage capacitance be greater than the capacitance of the storage capacitance in the pixel circuit that is electrically charged after, solve due to number
It according to the parasitic capacitance on line, causes inconsistent to the storage capacitance charging time in different pixel circuits, in turn results in pair
The inconsistent problem of storage capacitance charging voltage in unused pixel circuit, improves the uniform of the brightness of OLED display panel
Property, and improve the yield of OLED display panel.
On the basis of the above embodiments, the data line in a frame of display, with the data-signal of transmission same size
The variance rate of the different pixels circuit of 111 electrical connections, the charging voltage of storage capacitance Cst is less than or equal to 2%.
As shown in Figure 1, having number in P1 class pixel is that the column of pixel 11 corresponding one and pixel 13 corresponding one arrange, two pictures
The capacitance of storage capacitance Cst is equal in element, because two column pixels are controlled by control signal wire CLK1, therefore charging time
It is identical, but because of difference inevitable in manufacturing process, it is essentially equal that the voltage being charged to cannot be completely secured, but can connect very much
Closely, the variance rate of charging voltage is less than or equal to 2%.Assuming that the data voltage phase for the data-signal that different types of pixel receives
Together, such as P1 class and P2 class pixel receive the data-signal of same size, although pixel circuit in P1 class pixel and P2 class pixel
Storage capacitance Cst capacitance it is different, after overcharge, theory obtains identical charging voltage.In the production process, because of system
Make the difference of process, the variance rate of inhomogeneity pixel charged voltage is less than or equal to 2%, improve display panel homogeneity and
Yield.
In embodiments of the present invention, the electricity of the storage capacitance Cst in the pixel circuit being electrically connected with same data line 111
Capacitance is equal.
Storage capacitance in display panel, in the pixel of array arrangement in the corresponding pixel circuit of pixel of same row
The capacitance of Cst is equal, i.e., the capacitance of the storage capacitance Cst in the corresponding pixel circuit of same type of pixel is equal.Such as
Shown in Fig. 1, pixel 11, pixel 21, pixel 31, pixel 41 ... electrical connection same data line 111, pixel 11, pixel 21,
Pixel 31, pixel 41 ... pixel circuit in storage capacitance capacitance it is equal.Pixel 12, pixel 22, pixel 32, as
Element 42 ... electrical connection same data line 111, pixel 12, pixel 22, pixel 32, pixel 42 ... pixel circuit in
The capacitance of storage capacitance is equal, ensure that the luminous homogeneity of display panel.
On the basis of the above embodiments, with continued reference to Fig. 2, in the pixel circuit, the first pole of storage capacitance Cst with
The grid electrical connection of driving transistor Mdr, the second pole for inputting fixed level signal, such as with the first power voltage line
ELVDD electrical connection.
The grid of first switch transistor M1 scan line 112 corresponding with pixel circuit is electrically connected, and is used for pixel circuit
The first pole of voltage data signal write-in storage capacitance Cst on corresponding data line 111, the first pole is electrically connected with data line 111
It connects and the second pole is electrically connected with the first pole of storage capacitance Cst.
The first pole of driving transistor Mdr is electrically connected with the first power voltage line ELVDD, the second pole and light-emitting element E 1
Anode electrical connection.
The cathode of light-emitting element E 1 is electrically connected with the one or two power voltage line ELVSS.
As shown in Fig. 2, when scan line 112 exports scanning signal, the first switch transistor M1 of corresponding pixel circuit
Storage capacitance Cst is written in voltage data signal on the corresponding data line 111 of pixel circuit by conducting, first switch transistor M1
The first pole, the grid of the storage voltage write driver transistor on storage capacitance Cst, driving transistor Mdr generates driving electricity
Stream driving light-emitting element E 1 shines；When scan line 112 does not export scanning signal, first switch transistor M1 cut-off, storage electricity
The voltage for holding Cst storage makes that transistor is driven persistently to generate driving current, drives 1 continuous illumination of light-emitting element E.
Based on the above technical solution, multi-path choice unit 121, further includes:
N second switch transistor, input of the first of n second switch transistor extremely with multi-path choice unit 121
Vin electrical connection is held, the second pole of n second switch transistor is electrically connected with n output end vo ut of multi-path choice unit 121 respectively
It connects, the grid of n second switch transistor is electrically connected with first to n control signal wire respectively.
During a scan line exports scanning signal, first to nth control signal wire is sequentially output pulse signal, the
One to n-th second switch transistor sequentially turns on.
For example, Fig. 5 is a kind of structural schematic diagram of multiple selector provided in an embodiment of the present invention, as shown in figure 5, multichannel
Selector includes 2 multi-path choice units 121, each multi-path choice unit 121 includes 2 second switch transistors, respectively
For first second switch transistor M2-1 and second second switch transistor M2-2.First second switch transistor M2-1
It is electrically connected with the first pole of second second switch transistor M2-2 with input terminal Vin, the second pole is electric with output end vo ut respectively
Connection, first second switch transistor M2-1 and second second switch transistor M2-2 grid respectively with control signal wire
CLK1 and control signal wire CLK2 electrical connection.Within a scanning signal period, control signal wire CLK1 and control signal wire
CLK2 is sequentially output pulse signal, control first second switch transistor M2-1 and second second switch transistor M2-2 according to
Secondary conducting.When second switch transistor turns in each multi-path choice unit 121, other second switch transistors
Shutdown.
Fig. 6 is the control signal wire and pixel circuit of the multiple selector in display panel provided in an embodiment of the present invention
The timing diagram of scan line.With reference to shown in Fig. 5 and Fig. 6, in the t1 stage, when a wherein output scanning letter for multi-strip scanning line 112
When number to corresponding pixel circuit, the first switch transistor M1 conducting of corresponding pixel circuit.Illustratively, as scan line G1
In the t1 stage when exporting scanning signal, control signal wire CLK1 exports useful signal prior to control signal wire CLK2, therefore, in t2
Stage, control signal wire CLK1 control second switch transistor M2-1 and second switch transistor M2-3 conducting connected to it,
Corresponding data line 111 is data line D1 by the storage capacitance in the corresponding pixel circuit of voltage data signal writing pixel 11,
And data line D3 is by the storage capacitance Cst in the corresponding pixel circuit of voltage data signal writing pixel 13, i.e., to P1 class picture
Storage capacitance Cst charging in plain circuit.In the t3 stage, control signal wire CLK2 controls other second switch connected to it
Transistor M2-2 and second switch transistor M2-4 conducting, corresponding data line 111 are that data line D2 writes voltage data signal
Enter storage capacitance in the corresponding pixel circuit of pixel 12 and data line D4 is corresponding by voltage data signal writing pixel 14
Storage capacitance Cst in pixel circuit charges to the storage capacitance Cst in P2 class pixel circuit.In the t3 stage, even if second
Switching transistor M2-1 and second switch transistor M2-3 shutdown, no longer to data line D1 and data line D3 transmission data-signal electricity
Pressure, due to the parasitic capacitance on data line, the voltage data signal of data line D1 and data line D3 storage continues to 11 He of pixel
Pixel 13 charges, namely continues to charge to P1 class pixel.Therefore the charging time of the storage capacitance Cst in P1 class pixel circuit is long
The charging time of storage capacitance Cst in P2 class pixel circuit, as shown in figure 3, curve P1-3 is the charging song of P1 class pixel
Line, curve P2-3 are the charging curve of P2 class pixel.The capacitance of storage capacitance Cst in the present invention in P1 class pixel circuit is big
The capacitance of storage capacitance Cst in P2 class pixel circuit, the storage capacitance Cst charging rate in P2 class pixel circuit is fast,
If the curve P1-4 and curve P2-4 in Fig. 4, curve P1-4 are the charging curve of P1 class pixel, curve P2-4 is P2 class pixel
Charging curve.The slope of curve P2-4 is big, shows that the storage capacitance Cst charging rate in the pixel circuit of P2 class pixel is fast.It deposits
Storage hold Cst charging voltage be equal to charging time and charging rate product, therefore in different times in, can make P1 and
The charging voltage of storage capacitance Cst in P2 class pixel circuit is identical, i.e., as right after curve P1-4 and curve P2-4 charging in Fig. 4
The voltage value answered is equal.
On the basis of the above embodiments, picture corresponding to the second switch transistor of same control signal wire electrical connection
The capacitance of storage capacitance Cst in plain circuit is equal.
As shown in figure 5, including two multi-path choice units 121 in multiple selector, have in each multi-path choice unit 121
Two second switch transistors.Totally four second switch transistors are respectively M2-1, M2-2, M2- to two multi-path choice units 121
By control signal wire CLK1 control conducting and cut-off, second switch transistor M2-1 and M2-3 are corresponding by 3 and M2-4, M2-1 and M2-3
Pixel circuit in the storage capacitance Cst charging time it is identical.Second switch transistor M2-2 and M2-4 are by control signal wire
CLK2 control is connected and cut-off, the storage capacitance Cst charging in the corresponding pixel circuit of second switch transistor M2-2 and M2-4
Time is identical.The electricity of second switch transistor M2-1 and M2-3, M2-2 and the storage capacitance Cst in the corresponding pixel circuit of M2-4
Capacitance difference is equal, it is ensured that storage capacitance Cst's in the corresponding pixel circuit of second switch transistor M2-1 and M2-3
Charging voltage is equal, the charging voltage of the storage capacitance Cst in the corresponding pixel circuit of second switch transistor M2-2 and M2-4
It is equal.The charging time of storage capacitance Cst in the corresponding pixel circuit of different control signal wire Ctrl is different, and charging voltage is logical
The capacitance for overregulating storage capacitance Cst adjusts the final charging voltage phase that its charging rate makes different pixel circuits
Together.Therefore can guarantee within the t1 stage, the voltage after the charging of different pixels is close or equal, improves luminous pixel
The homogeneity of brightness improves the yield of display panel.
Fig. 7 is the circuit diagram of another pixel circuit of display panel provided in an embodiment of the present invention, and the present embodiment is upper
On the basis of stating each embodiment, which further includes LED control signal line 113；Pixel circuit further includes that third switch is brilliant
Body pipe, the 4th switching transistor and the 5th switching transistor (M3-M5).
The electrical connection of data line 111 corresponding with pixel circuit of the first pole of first switch transistor M1, the second pole and driving
The first pole of transistor Mdr and the second pole electrical connection of the 5th switching transistor M5 and grid are electrically connected with scan line 112；
Drive the of the second pole of transistor Mdr and the first pole of third switching transistor M3 and the 4th switching transistor M4
The electrical connection of two poles and grid are electrically connected with the second pole of the first pole of the 4th switching transistor M4 and storage capacitance Cst；
The grid of 4th switching transistor M4 is electrically connected with scan line 112；
The first pole of 5th switching transistor M5 and the first of the first power supply voltage signal line ELVDD and storage capacitance Cst
Pole electrical connection and grid are electrically connected with LED control signal line 113；
The second pole of third switching transistor M3 is electrically connected with the first pole of light-emitting element E 1 and grid and light emitting control
Signal wire 113 is electrically connected；
Second pole of light-emitting element E 1 is electrically connected with second source voltage signal line ELVSS.
The second pole of storage capacitance Cst is electrically connected with the first power voltage line ELVDD, for inputting fixed level signal.
When scan line 112 exports scanning signal, first switch transistor M1 and the 4th switching transistor M4 are connected, on data line 111
Voltage data signal write driving transistor Mdr the first pole.After LED control signal line 113 exports luminous signal, third
Switching transistor M3 and the 5th switching transistor M5 conducting, the voltage change of N1 point make that transistor Mdr is driven to be also switched on, are stored in
Voltage data signal on driving transistor Mdr persistently generates driving current by third switching transistor M3 and is transmitted to the member that shines
Part E1 makes its continuous illumination.
It should be noted that the pixel circuit in above-described embodiment is only a kind of citing, rather than limit.Using storage electricity
Hold the pixel circuit to charge to be within the scope of the invention.
On the basis of above-mentioned each embodiment, first switch transistor M1 to the 5th switching transistor M5 and driving crystal
Pipe Mdr can be P-type transistor.It should be noted that first switch transistor M1 to the 5th switching transistor M5 and driving are brilliant
Body pipe Mdr may be N-type transistor, transistor turns when grid receives high level.
A kind of display device is present embodiments provided, Fig. 8 is a kind of structure of display device provided in an embodiment of the present invention
Schematic diagram has phase as shown in figure 8, the display device 810 includes the display panel 811 that above-mentioned any one embodiment provides
Same function and beneficial effect.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to 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 by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. a kind of display panel characterized by comprising
The multi-strip scanning line extend in a first direction, arranged in a second direction；Extend, along the second direction along the first party
To the multiple data lines of arrangement；Wherein, the first direction and second direction intersection；The a plurality of scan line and a plurality of institute
It states data line and limits multiple pixels, each pixel includes a pixel circuit；The pixel circuit includes that at least one is deposited
Storage appearance, first switch transistor, driving transistor and light-emitting component, the driving transistor is for providing driving current driving
The light-emitting component shines, and shown first switch transistor is used for the data on the corresponding data line of the pixel circuit
The first pole of the storage capacitance is written in signal voltage, and the storage capacitance is used to keep the grid electricity of the driving transistor
Pressure；The a plurality of scan line is for output scanning signal one by one to the corresponding pixel circuit；
Multiple selector, the multiple selector include multiple multi-path choice units, and each multi-path choice unit includes one
A input terminal and n output end, each output end are electrically connected with the corresponding pixel circuit by a data line, are used
In exporting the scanning signal stage in the scan line, the data-signal that input terminal inputs is transmitted to it one by one and is electrically connected the number
According to line, to charge to the storage capacitance in the corresponding pixel circuit；Wherein n is the positive integer more than or equal to 2；
Wherein, scan line described in any bar exports the scanning signal stage, the storage electricity in the pixel circuit being formerly electrically charged
The capacitance of appearance is greater than the capacitance of the storage capacitance in the pixel circuit being electrically charged after.
2. display panel according to claim 1, which is characterized in that the multi-path choice unit, further includes:
N second switch transistor, input of the first of the n second switch transistor extremely with the multi-path choice unit
End electrical connection, n output end of the second pole of the n second switch transistor respectively with the multi-path choice unit are electrically connected
It connects, the grid of the n second switch transistor is electrically connected with first to n control signal wire respectively.
3. display panel according to claim 2, which is characterized in that described the second of same control signal wire electrical connection
The capacitance of storage capacitance in pixel circuit corresponding to switching transistor is equal.
4. display panel according to claim 2, which is characterized in that within a scanning signal period, first to nth
The control signal wire is sequentially output pulse signal, and first to the n-th second switch transistor sequentially turns on.
5. display panel according to claim 1, which is characterized in that the first pole of the storage capacitance and the driving are brilliant
The grid of body pipe is electrically connected, and the second pole of the storage capacitance is for inputting fixed level signal；
The scan line electrical connection corresponding with the pixel circuit of the grid of the first switch transistor, is used for the picture
The first pole of the storage capacitance is written in voltage data signal on the corresponding data line of plain circuit.
6. display panel according to claim 5, which is characterized in that the display panel further includes LED control signal
Line, the first power supply voltage signal line and second source voltage signal line；The pixel circuit further includes third switching transistor,
Four switching transistors and the 5th switching transistor；
The data line electrical connection corresponding with the pixel circuit of first pole of the first switch transistor, the second pole and institute
State the first pole of driving transistor and the second pole electrical connection of the 5th switching transistor and grid and scan line electricity
Connection；
The first pole and the 4th switching transistor of second pole for driving transistor and the third switching transistor
The electrical connection of second pole and grid are electrically connected with the first pole of the 4th switching transistor and the second pole of the storage capacitance
It connects；
The grid of 4th switching transistor is electrically connected with the scan line；
First pole of the 5th switching transistor and the first pole of the first power supply voltage signal line and the storage capacitance
Electrical connection and grid are electrically connected with the LED control signal line；
Second pole of the third switching transistor is connect with the first pole of the light-emitting component and grid and the luminous control
Signal wire electrical connection processed；
Second pole of the light-emitting component is electrically connected with the second source voltage signal line.
7. display panel according to claim 6, which is characterized in that the first switch transistor to the 5th switch
Transistor and the driving transistor are P-type transistor.
8. display panel according to claim 1, which is characterized in that there are parasitic capacitances on the data line.
9. display panel according to claim 1, which is characterized in that the pixel electricity being electrically connected with same data line
The capacitance of storage capacitance in road is equal.
10. display panel according to claim 1, which is characterized in that in a frame of display, with transmission same size
The difference pixel circuit of the data line electrical connection of data-signal, the variance rate of the charging voltage of storage capacitance are less than
Equal to 2%.
11. a kind of display device, which is characterized in that including such as described in any item display panels of claim 1-10.
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| CN201711144711.6A CN109801594B (en) | 2017-11-17 | 2017-11-17 | Display panel and display device |
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| WO2023092346A1 (en) * | 2021-11-24 | 2023-06-01 | 京东方科技集团股份有限公司 | Display substrate and driving method therefor, and display device |
| CN116758865A (en) * | 2023-06-29 | 2023-09-15 | 重庆惠科金渝光电科技有限公司 | Display panel, driving method thereof and electronic equipment |
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| CN109801594B (en) | 2021-02-12 |
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Address after: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant after: Shanghai Hehui optoelectronic Co., Ltd Address before: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant before: EverDisplay Optronics (Shanghai) Ltd. |
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