CN105761675B - Organic light emitting display panel, driving method thereof and organic light emitting display device - Google Patents
Organic light emitting display panel, driving method thereof and organic light emitting display device Download PDFInfo
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- CN105761675B CN105761675B CN201610329687.2A CN201610329687A CN105761675B CN 105761675 B CN105761675 B CN 105761675B CN 201610329687 A CN201610329687 A CN 201610329687A CN 105761675 B CN105761675 B CN 105761675B
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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
- G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses an organic light emitting display panel, a driving method thereof and an organic light emitting display device. The organic light emitting display panel includes: a plurality of data lines, a plurality of pixel units correspondingly connected with the data lines; a driving circuit including a plurality of first multi-way gates and a plurality of second multi-way gates, the first multi-way gates being electrically connected to the data lines, the second multi-way gates being electrically connected to the data lines, wherein the organic light emitting display panel includes a data signal writing stage and a light emitting stage within one frame period; in a data signal writing stage, the first multi-channel gate outputs data signals to the plurality of data lines one by one, and in a light emitting stage, the pixel units emit light; the second multi-way gate transmits the first voltage signals to the data lines one by one after each data line receives the data signals and before the pixel units emit light; the voltage value of the first voltage signal is smaller than that of the data signal. The embodiment can improve the uniformity of the display brightness of the organic light emitting display.
Description
Technical field
The application is related to display technology field, and in particular to organic light emitting display technical field, more particularly to organic light emission
Display panel and its driving method, organic light-emitting display device.
Background technology
OLED is shown using the spontaneous light characteristic of organic semiconducting materials, compared with liquid crystal display,
OLED can effectively reduce the thickness of display screen without backlight.Generally, the display of OLED
The pel array being made up of sub-pixel is provided with area.Each sub-pixel includes an Organic Light Emitting Diode, is driven by a pixel
Dynamic circuit drives light.
Existing a kind of pixel-driving circuit can include switching transistor and driving transistor, and switching transistor is at one
Turned under the control of scanning signal, for the data-signal transmitted on data wire to be transferred to the source electrode of driving transistor.Driving
The data-signal that transistor receives source electrode under the control of LED control signal is transferred to drain electrode, and Organic Light Emitting Diode can
Lighted with the electric current exported according to the drain electrode of driving transistor.Display panel is provided with a plurality of data lines, and each data wire exists
Converge post-tensioning at the step of display panel to driving IC (integrated circuit, integrated circuit).In order to reduce at step
Cabling quantity, the design of generally use multi-channel gating device, switching transistor be switched on a period in, multi channel selecting
Device can be by a cabling with receiving data-signal and timesharing to a plurality of data lines outputting data signals.
Fig. 1 is refer to, it illustrates a kind of existing structural representation of multi-channel gating device.As shown in figure 1, multi channel selecting
Device MUX include a data signal input DATA, multiple data signal output out1, out2, out3, out4, out5,
Out6 and with data signal output multiple clock signal input terminal CK1, CK2, CK3, CK4, CK5, CK6 correspondingly.
Wherein, each data signal output connects a data line S1, S2, S3, S4, S5, S6 respectively.Fig. 2 is shown comprising Fig. 1 institutes
The working timing figure of the organic electroluminescence display panel of the multi-channel gating device shown, wherein Scan are for controlling in pixel-driving circuit
Switching transistor scanning signal, EMIT be for controlling the light emitting control of the driving transistor in pixel-driving circuit to believe
Number, CK1, CK2, CK3, CK4, CK5, CK6 represent clock signal input terminal CK1, CK2, CK3, CK4, CK5, CK6 input respectively
Clock pulse signal.Usual Scan is used to control the switching transistor in one-row pixels drive circuit, and Fig. 2 is with Scan in low level
When, the switching transistor in one-row pixels drive circuit illustrates exemplified by being switched on.From figure 2 it can be seen that in a line picture
In the time that switching transistor in plain drive circuit is opened, each clock signal controls the more datas being connected with multi-channel gating device
Path between line and data signal input is switched on successively, the path between a data line and data signal input
In the time switched on, the data wire charges to corresponding pixel-driving circuit.Due to very big parasitism electricity on data wire be present
Hold (such as equivalent capacity, the equivalent capacity etc. that is formed with public electrode wire formed with public electrode) so that data wire with
After path between data signal input is disconnected, because the switching transistor in one-row pixels drive circuit is still in Scan
Control under open, parasitic capacitance can also charge to corresponding pixel-driving circuit on the data wire, therefore per data line
Path of the charging interval between the data wire and data signal input be turned on to switching transistor by cut-off between when
Between section.So as to cause in same a line sub-pixel, the different pieces of information line that is connected with same multi-channel gating device to sub-pixel charge when
Between it is inconsistent so that it is inconsistent to be charged the signal intensity of sub-pixel under pure color picture, and it is uneven thus to produce display brightness
The problem of even.
The content of the invention
In order to solve the above-mentioned technical problem, this application provides organic electroluminescence display panel and its driving method.
In a first aspect, this application provides a kind of organic electroluminescence display panel, including：A plurality of data lines, with data wire pair
The multiple pixel cells that should be connected；Drive circuit, drive circuit includes multiple first multi-channel gating devices and multiple second multichannels are selected
Logical device, the first multi-channel gating device electrically connect with data wire, and the second multi-channel gating device electrically connects with data wire, wherein, organic light emission
Display panel includes data-signal write phase and glow phase within a frame period；In data-signal write phase, first
Multi-channel gating device transmits data-signal one by one to a plurality of data lines, and in glow phase, pixel cell lights；Second multi-channel gating device
After each data line receives data-signal, in pixel cell it is luminous before, transmit first voltage one by one to data wire
Signal；The magnitude of voltage of first voltage signal is less than the magnitude of voltage of data-signal.
Second aspect, this application provides a kind of driving method of organic electroluminescence display panel, organic electroluminescence display panel
Including a plurality of data lines and drive circuit, drive circuit includes multiple first multi-channel gating devices and multiple second multi channel selectings
Device, the first multi-channel gating device electrically connect with data wire, and the second multi-channel gating device electrically connects with data wire；Driving method includes：
Data-signal write phase in one frame period, apply data letter one by one to a plurality of data lines by the first multi-channel gating device
Number；Glow phase within a frame period, LED control signal is provided so that pixel cell lights to pixel cell；Each
After data line receives data-signal, before pixel cell is luminous, by the second multi-channel gating device to data wire one by one
Apply first voltage signal；The magnitude of voltage of first voltage signal is less than the magnitude of voltage of data-signal.
The third aspect, this application provides a kind of organic light-emitting display device, including above-mentioned organic electroluminescence display panel.
The organic electroluminescence display panel and its driving method, organic light-emitting display device that the application provides, using more than two
Road gate carries out the input of data-signal and the input of first voltage signal respectively, is controlled using the first voltage signal being filled with
Driving transistor is ended in pixel-driving circuit, so as to lift the uniformity in each data wire charging interval, is improved organic light emission and is shown
Show the homogeneity of device display brightness.
Brief description of the drawings
Non-limiting example is described in detail with reference to what the following drawings was made by reading, other features,
Objects and advantages will become more apparent upon：
Fig. 1 is a kind of structural representation of existing multi-channel gating device；
Fig. 2 is the working timing figure of the organic electroluminescence display panel comprising the multi-channel gating device shown in Fig. 1；
Fig. 3 is the structural representation of the one embodiment for the organic electroluminescence display panel that the application provides；
Fig. 4 is a structure of the pixel-driving circuit of the pixel cell in the organic electroluminescence display panel that the application provides
Schematic diagram；
Fig. 5 is the structural representation of another embodiment of the organic electroluminescence display panel that the application provides；
Fig. 6 is the structural representation of another embodiment of the organic electroluminescence display panel that the application provides；
Fig. 7 is the structural representation of the further embodiment for the organic electroluminescence display panel that the application provides；
Fig. 8 is the working timing figure of one embodiment of organic electroluminescence display panel shown in Fig. 5；
Fig. 9 is the working timing figure of one embodiment of organic electroluminescence display panel shown in Fig. 6 or Fig. 7.
Embodiment
The application 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 related invention, rather than the restriction to the invention.It also should be noted that in order to
Be easy to describe, illustrate only in accompanying drawing to about the related part of invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 3 is refer to, the structural representation of one embodiment of the organic electroluminescence display panel provided it illustrates the application
Figure.As shown in figure 3, organic electroluminescence display panel 300 include a plurality of data lines 31, it is corresponding with a plurality of data lines 31 connect it is multiple
Pixel cell 32 and drive circuit 33.Wherein drive circuit 33 includes multiple first multi-channel gating devices and multiple second multichannels are selected
Logical device.Fig. 3 schematically shows two the first multi-channel gating devices 331 and 332, and two Hes of the second multi-channel gating device 333
334.First multi-channel gating device electrically connects with data wire 31, and the second multi-channel gating device electrically connects with data wire 32.Can from Fig. 3
Go out, same data line 31 is connected with first multi-channel gating device and second multi-channel gating device.
Organic electroluminescence display panel 300 includes data-signal write phase and glow phase within a frame period.
Data-signal write phase, the first multi-channel gating device transmit data-signal one by one to a plurality of data lines 31；In glow phase, pixel
Unit 32 is luminous.Second multi-channel gating device lights it after each data line 31 receives data-signal, in pixel cell
Before, first voltage signal is transmitted one by one to data wire 31.Wherein, the magnitude of voltage of first voltage signal is less than the voltage of data-signal
Value.
With further reference to Fig. 4, the pixel of the pixel cell in the organic electroluminescence display panel provided it illustrates the application
One structural representation of drive circuit, namely show the circuit of pixel cell 32 in organic electroluminescence display panel shown in Fig. 3
Structural representation.It should be noted that the pixel-driving circuit illustrated in Fig. 4 illustrates by taking P-type transistor circuit as an example, figure
4 merely to the pixel driver electricity of the pixel cell in the organic electroluminescence display panel for illustrating technical scheme and providing
The one of which structural representation on road, the limitation for the present invention should not be caused.
As shown in figure 4, pixel cell 400 includes switching transistor M1, driving transistor M2, third transistor M3, the 4th
Transistor M4, the 5th transistor M5, the 6th transistor M6, the first electric capacity C1, the second electric capacity C2, Organic Light Emitting Diode D1,
Scan signal input Scan1, the second scanning signal input Scan2, LED control signal input Emit, data-signal
Input DATA, reference voltage signal input VREF and second voltage signal input part VDD.Wherein, switching transistor M1
Grid be connected with the second scanning signal input Scan2, switching transistor M1 the first pole and the second pole are believed with data respectively
Number input Vdata connects with driving transistor M2 the first pole；The of driving transistor M2 grid and the 4th transistor M4
Two poles are connected, and driving transistor M2 the second pole is connected with the 6th transistor M6 the first pole；Third transistor M3 grid with
Second scanning signal input Scan2 connections, third transistor M3 the first pole and the second pole is respectively with the 4th transistor M4's
Second pole connects with the second pole of driving transistor；4th transistor M4 grid and the first scanning signal input Scan1 connect
Connect, the 4th transistor M4 the first pole is connected with reference voltage signal input VREF；5th transistor M5 grid is with lighting
Control signal input Emit connections, the 5th transistor M5 the first pole and the second pole the first pole with driving transistor M2 respectively
Connected with second voltage signal input part VDD；6th transistor M6 grid is connected with LED control signal input Emit, the
Six transistor M6 the second pole is connected with Organic Light Emitting Diode D1 positive pole；Organic Light Emitting Diode D1 negative pole ground connection.
Pixel-driving circuit shown in Fig. 4 can realize driving transistor M2 threshold voltage compensation.Specifically, driven in pixel
The first stage of dynamic circuit work, switching transistor M1 is under the control of the second scanning signal input Scan2 signals inputted
Cut-off, the 5th transistor M5 and the 6th transistor M6 are cut under the control of the LED control signal input Emit signals inputted
Only, the 4th transistor M4 is turned under the control of the first scanning signal input Scan1 signals inputted, by reference voltage signal
The signal Vref1 of input VREF inputs is transmitted to driving transistor M2 grid, at this moment, the electricity of driving transistor M2 grid
Position Vg=V ref1；In second stage, controls of the 4th transistor M4 in the first scanning signal input Scan1 signals inputted
Lower cut-off, the 5th transistor M5 and the 6th transistor M6 are cut under the control of the LED control signal input Emit signals inputted
Only, switching transistor M1 is turned under the control of the second scanning signal input Scan2 signals inputted, and data-signal is inputted
The data-signal Vdata1 of end DATA inputs is transmitted to driving transistor M2 the first pole S, at this moment, driving transistor M2 grid
G current potential Vg=Vdata1- | Vth |, wherein Vth is driving transistor M2 threshold voltage, when driving transistor M2 is that p-type is brilliant
During body pipe, Vth<0；In the phase III, controls of the switching transistor M1 in the second scanning signal input Scan2 signals inputted
Lower cut-off, the 4th transistor M4 end under the control of the first scanning signal input Scan1 signals inputted, the 5th transistor
M5 is turned under the control of the LED control signal input Emit signals inputted, and second voltage signal VDD is transmitted to driving
Transistor M2 the first pole S, at this moment, the current potential Vg of driving transistor M2 grid G keep Vdata1- | Vth |, it can be deduced that
Vsg- | Vth |=VDD-Vdata1, wherein, Vsg is the voltage difference between driving transistor M2 the first pole S and grid G.Driving
In the case of dynamic transistor M2 size constancy, the leakage current of driving transistor M2 outputs is directly proportional to (Vsg- | Vth |), then when
When driving transistor M2 threshold voltage vt h changes, the leakage current of driving transistor M2 outputs will not also change, from
And realize the compensation to driving transistor threshold drift.
In the work schedule of above-mentioned pixel-driving circuit 400, data-signal is received in second stage pixel-driving circuit,
Organic light-emitting diode is controlled in phase III pixel-driving circuit.
When the pixel-driving circuit shown in Fig. 4 is applied in the pixel cell of display panel shown in Fig. 3, the second multichannel
Gate can be before the phase III of pixel-driving circuit work schedule (such as in second stage), you can with data wire
Before pixel-driving circuit control organic light-emitting diode after receiving data-signal, in pixel cell, to data
Line applies first voltage signal successively.It is Vg=Vdata1- in the current potential of second stage driving transistor M2 grid G | Vth |,
Data signal input DATA receives the first voltage signal Vinit1 of data line transfer afterwards, first voltage signal Vinit1's
Magnitude of voltage is less than data-signal Vdata1 magnitude of voltage, and the potential difference between driving transistor M2 grid G and source S is Vsg
=Vs-Vg=Vinit-Vdata1+ | Vth |, so as to Vsg- | Vth |=Vinit-Vdata1, due to Vdata1>Vinit1, institute
With Vsg- | Vth | the potential difference between ＜ 0, i.e. driving transistor M2 source S and grid G is less than the absolute of its threshold voltage
Value, driving transistor M2 is P-type transistor, and at this moment driving transistor M2 is ended, and the parasitic capacitance on data wire can not continue
Charged by driving transistor M2.The time that pixel cell is electrically charged is that data wire starts to receive the time of data-signal to data
Line receives the time of first voltage signal.
For a plurality of data lines being connected with first multi-channel gating device, due to by the way of being transmitted one by one using timesharing to
Data line transfer data-signal, and to data line transfer first voltage signal, each data wire by the way of timesharing is transmitted one by one
The time difference received between the time of data-signal and the time of reception first voltage signal can be approximate or equal, i.e., each data
Difference between the actual charging interval of line reduces, and effectively improves because the actual charging interval difference of data wire is excessive and makes
Into display brightness inequality the problem of.
With reference to figure 5, the structural representation of another embodiment of the organic electroluminescence display panel provided it illustrates the application
Figure.As shown in figure 5, organic electroluminescence display panel 500 include a plurality of data lines 51, it is corresponding with a plurality of data lines 51 connect it is multiple
Pixel cell 52 and drive circuit 53.Wherein drive circuit 53 includes multiple first multi-channel gating devices and multiple second multichannels are selected
Logical device.Fig. 5 schematically shows two the first multi-channel gating devices 531/532, and two the second multi-channel gating devices 533/
534.First multi-channel gating device electrically connects with data wire 51, and the second multi-channel gating device electrically connects with data wire 51.Same data
Line 51 is connected with first multi-channel gating device and second multi-channel gating device.
From fig. 5, it can be seen that on the basis of embodiment illustrated in fig. 3, organic light emitting display face that the present embodiment is provided
Plate 500 also includes at least one data signal input DATA1, and at least one first voltage signal input part V1.At this
In embodiment, the first multi-channel gating device 531/532 includes multiple the first transistor M51, each the first transistor M51 the first pole
It is connected with a data signal input DATA1；Second multi-channel gating device 533/534 includes multiple second transistor M52, each
Second transistor M52 the first pole is connected with a first voltage signal input part V1.Organic electroluminescence display panel 500 it is a plurality of
Data wire 51 include S11, S12 ..., S1n, S21, S22 ..., S2N ..., wherein per data line respectively with a first crystal
Pipe M51 the second pole and a second transistor M52 the second pole connection.
Further, the first multi-channel gating device 531 and 532 of organic electroluminescence display panel 500 includes n first input
End, for example, first input end CKH11, CKH12 shown in Fig. 5 ..., CKH1n, n be positive integer.Each the first transistor M51
Grid be connected respectively with a first input end.Second multi-channel gating device 533 and 534 of organic electroluminescence display panel 500 is equal
Including n the second inputs, for example, second input CKH21, CKH22 shown in Fig. 5 ..., CKH2n.Each second crystal
Pipe M52 grid is connected with second input respectively.
In the present embodiment, first first input end is used to receive the first clock signal, and i-th of first input end receives
Signal and the signal that receives of the i-th -1 first input end have first clock signal pulsewidth time difference；First
Second input is used to receive second clock signal；The signal that j-th of second inputs receive terminates with the input of jth -1 second
The signal of receipts has the time difference of the pulsewidth of a second clock signal；Wherein, i be integer and 2≤i≤n, j be integer and 2≤
j≤n.That is, first input end CKH11, CKH12 ..., in CKH1n, the clock signal of each first input end input is with before
Time difference between the clock signal of one first input end input is the pulsewidth length of the first clock signal；Second input
CKH21, CKH22 ..., in CKH2n, the clock signal and the clock of previous second input input of each second input input
Time difference between signal is the pulsewidth length of second clock signal.Thus, it is connected with same first multi-channel gating device more
Data line can be within the time that driving transistor is switched on one by one to pixel cell transmission data signal input input
Signal.
In the present embodiment, (such as S1k, k are positive integer and k≤n) one the first transistor of connection per data line 51
M51 the second pole and a second transistor M52 the second pole.The first transistor being connected with same data line S1k or S2k
In M51 and second transistor M52, second transistor M52 is switched on after the first transistor M51.When the first transistor M51 quilts
During conducting, data wire S1k receives the signal of data signal input DATA1 inputs, when second transistor M52 is turned on, data
Line S1k receives the signal of first voltage signal input part V1 inputs.The signal of data signal input DATA1 inputs is believed for data
Number, be pixel cell display drive signals；First voltage signal input part V1 inputs for first voltage signal, first voltage
The magnitude of voltage of signal is less than the magnitude of voltage of data-signal.
Further, in the first transistor M51 of same data line 51 (such as S1k, k are positive integer and k≤n) connection
In second transistor M52, when second transistor M52 is switched on, the first transistor M51 is cut-off state.That is, in number
When receiving first voltage signal according to line S1k, data-signal is not received.In other words, data wire S1k is after data-signal is received,
Receive first voltage signal.Because the magnitude of voltage of first voltage signal is less than the magnitude of voltage of data-signal, retouched according to reference to Fig. 4
The structural representation for the pixel-driving circuit stated, the 6th transistor is controlled in the signal of LED control signal input Emit inputs
Before M6 conductings, because driving transistor M2 grid potentials are Vg=Vdata1- | Vth |, to data signal input VDATA
Driving transistor M2 is ended after input first voltage signal Vinit1, and at this moment the signal on data wire S1k can not be transmitted to hair
Optical diode D1 anode, i.e., the first voltage signal Vinit1 inputted by the second multi-channel gating device 533 terminate data wire
S1k charging process, the current potential of driving transistor M6 the second pole are maintained at the second transistor of corresponding data wire S1k connections
Current potential before M52 is switched on.
In a further embodiment, the second clock signal that first second transistor M52 grid receives is m-th
The signal that first input end CK1m is received, wherein, m is integer and 2≤m ＜ n.The time of data-signal is then filled with per data line
Time difference between the signal received for first first input end CK11 signals received and m-th of first input end CK1m.
In the present embodiment, because the time difference between the clock signal of each first input end input is equal, each second is defeated
The time difference entered between the clock signal of end input is equal, so each data wire receives data-signal and receives first voltage signal
Between time difference it is equal so that the time that data wire inputs effective data-signal to pixel-driving circuit is equal, so as to solve
Determined due to each data wire charging interval is different and caused by display brightness inequality the problem of, pure color can be effectively improved and show picture
The quality in face.
In a further embodiment, second clock signal is the signal that second first input end receives.Further ginseng
Fig. 6 is examined, the structural representation of another embodiment of the organic electroluminescence display panel provided it illustrates the application.
As shown in fig. 6, organic electroluminescence display panel 600 includes a plurality of data lines 61, connection corresponding with a plurality of data lines 61
Multiple pixel cells 62 and drive circuit 63.Wherein drive circuit 63 includes multiple first multi-channel gating devices and multiple second
Multi-channel gating device.Wherein, data wire 61 include S11, S12 ..., S1n, S21, S22 ..., S2n ..., Fig. 6 is schematically shown
Two the first multi-channel gating devices 631 and 632, and two the second multi-channel gating devices 633 and 634.First multi-channel gating device 631
With data wire S11, S12 ..., S1n electrically connect, the first multi-channel gating device 632 and data wire S21, S22 ..., S2n electrically connect,
Two multi-channel gating devices 633 and data wire S11, S12 ..., S1n electrically connect, the second multi-channel gating device 634 and data wire S21,
S22 ..., S2n electrical connection.Same data line 61 is connected with first multi-channel gating device and second multi-channel gating device.
Further, the first multi-channel gating device 631 and 632 of organic electroluminescence display panel 600 includes n first input
End, for example, first input end CKH1, CKH2 shown in Fig. 6 ..., CKHn, n be positive integer.Each the first transistor M61 grid
Pole is connected with a first input end respectively.Second multi-channel gating device 633 and 634 of organic electroluminescence display panel 600 includes n
Individual second input, for example, second input CKH2, CKH3 shown in Fig. 6 ..., CKH (n+1).Each second transistor M62
Grid be connected respectively with second input.
Unlike embodiment illustrated in fig. 5, for the embodiment shown in Fig. 6, be connected with same data line 61
In one transistor M61 and second transistor M62, the first crystalline substance of second transistor M62 grid and the connection of next data line 61
Body pipe M61 grid is connected to identical first input end or the second input.In Fig. 6, in the second multi-channel gating device 633
N the second inputs be respectively CKH2, CKH3 ..., CKH (n+1), that is to say, that the second input of the second multi-channel gating device 633
End can be same input with the first input end in the first multi-channel gating device 631.In actual applications, s-th second
Transistor M62 grid and (s+1) individual the first transistor M61 grid are connected to a clock signal input terminal, and wherein s is
Positive integer and s<n；N-th of second transistor M62 grid can be connected to (n+1) individual clock signal input terminal, (n+1)
There is a clock between the signal of individual clock signal input terminal input and the clock signal of n-th of first input end CKn input
The time difference of the pulsewidth of signal.The time that data-signal is then filled with per data line 61 is defeated for first input end CKH1k or second
Enter to hold the pulsewidth length of the clock signal of CKH2k receptions, wherein, k is positive integer and k≤n.The data wire after the pulsewidth length
61 are charged first voltage signal immediately so that the charging interval per data line 61 is all only the pulsewidth of a clock signal
Time, compared to embodiment illustrated in fig. 5, the data wire charging interval shortens, while solving the brightness uniformity of display picture
The power consumption of display panel can also be reduced.
The organic electroluminescence display panel that each embodiment of the application provides includes viewing area, and pixel cell is arranged at viewing area
It is interior.In the above-described embodiments, the first multi-channel gating device and the second multi-channel gating device are located at the different both sides outside viewing area respectively.
Further, the first multi-channel gating device and the second multi-channel gating device can be located at two relative outsides of viewing area respectively.
To distinguish it should be noted that, although above embodiments only show the first multi-channel gating device and the second multi-channel gating device
Embodiment positioned at two relative outsides of viewing area, but in concrete implementation, the first multi-channel gating device and more than second
Road gate can be located at irrelative two sides outside viewing area respectively, and the application repeats no more to this.
In further embodiments, the first multi-channel gating device and the second multi-channel gating device can be located at same outside viewing area
Side.With continued reference to Fig. 7, the structural representation of the further embodiment of the organic electroluminescence display panel provided it illustrates the application
Figure.
As shown in fig. 7, organic electroluminescence display panel 700 includes a plurality of data lines 71, connection corresponding with a plurality of data lines 71
Multiple pixel cells 72 and drive circuit 73.Wherein, data wire 71 include S11, S12 ..., S1n, S21, S22 ...,
S2n ..., drive circuit 73 includes multiple first multi-channel gating devices and multiple second multi-channel gating devices.Fig. 7 is schematically shown
Two the first multi-channel gating devices 731 and 732, and two the second multi-channel gating devices 733 and 734.First multi-channel gating device and number
Electrically connected according to line 71, the second multi-channel gating device electrically connects with data wire 72.Same data line 71 and first multi channel selecting
Device and the second multi-channel gating device connection.
Further, the first multi-channel gating device 731 and 732 of organic electroluminescence display panel 700 includes n first input
End, for example, first input end CKH1, CKH2 shown in Fig. 7 ..., CKHn.Each the first transistor M71 grid is respectively with one
Individual first input end connection.Second multi-channel gating device 733 and 734 of organic electroluminescence display panel 700 includes n second input
End, for example, second input CKH2, CKH3 shown in Fig. 7 ..., CKH (n+1).Each second transistor M72 grid difference
It is connected with second input.
From figure 7 it can be seen that unlike embodiment illustrated in fig. 6, in the embodiment shown in Fig. 7, the first multi channel selecting
Device and the second multi-channel gating device are located at the same side outside the viewing area of organic electroluminescence display panel 700.By the first multi-channel gating device
The same side being arranged at the second multi-channel gating device outside viewing area can simplify the cabling in drive circuit, be advantageous to driving electricity
The steady operation on road, and the area of non-display area can be reduced.
It is organic in the various embodiments described above for driving present invention also provides the driving method of organic electroluminescence display panel
Light emitting display panel.Specifically, organic electroluminescence display panel can include a plurality of data lines, it is corresponding with data wire connect it is multiple
Pixel cell and drive circuit.Drive circuit includes multiple first multi-channel gating devices and multiple second multi-channel gating devices.First
Multi-channel gating device electrically connects with data wire, and the second multi-channel gating device electrically connects with data wire.
Driving method applied to above-mentioned organic electroluminescence display panel includes：Data-signal write-in within a frame period
In the stage, data-signal is applied by the first multi-channel gating device one by one to a plurality of data lines；Glow phase within a frame period,
LED control signal is provided so that pixel cell lights to pixel cell；After each data line receives data-signal,
Before pixel cell is luminous, first voltage signal is applied to data wire by the second multi-channel gating device one by one.Wherein, the first electricity
The magnitude of voltage of signal is pressed to be less than the magnitude of voltage of data-signal.
In the present embodiment, data-signal write phase, number is transmitted to a plurality of data lines to the first multi-channel gating device timesharing
It is believed that number.Because the parasitic capacitance on data wire is larger, the first multi-channel gating device by data signal input and data wire it
Between path when disconnecting, the parasitic capacitance on data wire can continue to charge to data wire, be believed by receiving data in data wire
Number backward data wire apply the first voltage signal smaller than the magnitude of voltage of data-signal, can be charged a period of time in data wire
Voltage on data wire is maintained to the magnitude of voltage of first voltage signal afterwards, avoids different pieces of information line charging interval difference from causing
Caused by the magnitude of voltage difference that driving pixel cell is shown the problem of display picture brightness disproportionation.
In some optional embodiments, drive circuit also includes at least one data signal input and at least one the
One voltage signal inputs.First multi-channel gating device includes multiple the first transistors and n first input end, each first crystal
First pole of pipe is connected with data signal input, and the grid of each the first transistor is connected with a first input end respectively.
Second multi-channel gating device includes multiple second transistors and n the second inputs, the first pole and first of each second transistor
Voltage signal inputs are connected, and the grid of each second transistor is connected with second input respectively；Divide per data line
It is not connected with the second pole of the first transistor and the second pole of a second transistor.Driving method further comprises：
The first clock signal is provided to first first input end；To i-th first input end provide with to the i-th -1 first input end
The signal of offer has the signal of the time difference of the pulsewidth of first clock signal；Second is provided to first the second input
Clock signal；There is provided to j-th of second inputs has a second clock with the signal provided to the input of jth -1 second
The signal of the time difference of the pulsewidth of signal.Wherein, i is integer and 1≤i≤n, j are integer and 1≤j≤n.
In the above-described embodiments, clock signal can be provided to each first input end one by one, it is first defeated to adjacent two
There is the delay of a clock pulses between the clock signal for entering to hold offer.Clock letter can be provided to each second input one by one
Number, the delay of a clock pulses is provided between the clock signal provided to two adjacent the second inputs.By to first
The clock signal that input provides controls the first transistor in first multi-channel gating device to sequentially turn on, and then successively to number
Data-signal is transmitted according to line；Second in second multi-channel gating device is controlled by the clock signal provided to the second input
Transistor sequentially turns on, and then successively to data line transfer first voltage signal, control after data wire receives data-signal
By the magnitude of voltage that the magnitude of voltage on data wire is first voltage signal, and each data wire be filled with time of data-signal can phase
Deng, it is consistent so as to ensure to be filled with the amplitude of the display drive signals of pixel cell, solve the problems, such as display picture brightness disproportionation.
Further, received to the second clock signal that first the second input provides for m-th of first input end
Signal, wherein, m is integer and 2≤m ＜ n.Alternatively, it is second to the second clock signal that first the second input provides
The signal that individual first input end receives.At this moment, the time that data wire receives data-signal is the pulsewidth length of the first clock signal,
Compared to above-described embodiment, the charging interval of data wire is further shorten in the present embodiment, in the brightness for solving display picture
The power consumption of display panel can also be reduced while uniformity.
It is further detailed below in conjunction with Fig. 8 and Fig. 9 driving methods provided the application.
Fig. 8 is refer to, it illustrates the working timing figure of one embodiment of organic electroluminescence display panel shown in Fig. 5.Have
Pixel cell 52 in machine light emitting display panel 500 is shown under scanning signal Scan and LED control signal EMIT control
Show.In first multi-channel gating device 531, multiple the first transistor M51 respectively by first input end CKH11, CKH12 ... CKH1n is defeated
The signal control entered, in the second multi-channel gating device 533, multiple second transistor M52 respectively by the second input CKH21,
CKH22 ... the signal control of CKH2n inputs.As shown in figure 8, first input end CKH11, CKH12 ... the clock of CKH1n inputs
There is the delay of clock pulse width one by one between signal, second input CKH21, CKH22 ... the signal of CKH2n inputs it
Between there is the delay of second clock pulsewidth one by one.As shown in figure 8, the first data wire S11 is in first first input end
The trailing edge of the pulse for the clock signal that CKH11 is received starts to be filled with data-signal DATA1, until first the second input
The trailing edge of the pulse for the clock signal that CKH21 is received starts to be filled with first voltage signal V1, is received in the second input CKH21
Clock signal pulse the first data wire of rising edge S11 stop charging.The like, the second data wire S12 is at second
The trailing edge of pulse for the clock signal that first input end CKH12 is received starts to be filled with data-signal DATA1, until second the
The trailing edge of the pulse for the clock signal that two input CKH22 are received starts to be filled with first voltage signal V1, in the second input
The first data wire of rising edge S12 of the pulse for the clock signal that CKH22 is received stops charging；N-th data wire S1n is at n-th
The trailing edge of the pulse for the clock signal that one input CKH1n is received starts to be filled with data-signal DATA1, until n-th second
The trailing edge of the pulse for the clock signal that input CKH2n is received starts to be filled with first voltage signal V1, in the second input
The first data wire of rising edge S1n of the pulse for the clock signal that CKH2n is received stops charging.
Fig. 9 is refer to, during it illustrates being the work of one embodiment of organic electroluminescence display panel shown in Fig. 6 or Fig. 7
Sequence figure.The control of pixel cell 62 in organic electroluminescence display panel 600 in scanning signal Scan and LED control signal EMIT
Under shown.In first multi-channel gating device 631, multiple the first transistor M61 respectively by first input end CKH1, CKH2 ...
The signal control of CKHn inputs, in the second multi-channel gating device 633, multiple second transistor M62 respectively by the second input CKH2,
CKH3 ... the signal control of CKH (n+1) inputs.As shown in figure 9, first input end CKH1, CKH2 ... the clock of CKHn inputs
There is the delay of clock pulse width one by one between signal, second input CKH2, CKH3 ... the signal of CKH (n+1) inputs it
Between there is the delay of second clock pulsewidth one by one.Per data line, the second transistor M62 of connection is by controlling a upper number
Controlled according to the first transistor M61 of line connection clock signal.As shown in figure 9, the first data wire S11 is in first first input
The trailing edge of the pulse for the clock signal that end CKH1 is received starts to be filled with data-signal DATA1, until first the second input
The trailing edge of the pulse for the clock signal that CKH2 is received starts to be filled with first voltage signal V1, is received in the second input CKH2
The first data wire of rising edge S11 of the pulse of clock signal stops charging.The like, the second data wire S12 is at second
The trailing edge of the pulse for the clock signal that one input CKH2 is received starts to be filled with data-signal DATA1, until second second
The trailing edge of the pulse for the clock signal that input CKH3 is received starts to be filled with first voltage signal V1, in the second input CKH3
The first data wire of rising edge S12 of the pulse of the clock signal of reception stops charging；N-th data wire S1n is in n-th first inputs
The trailing edge of the pulse for the clock signal that end CKHn is received starts to be filled with data-signal DATA1, until n-th of second inputs
The trailing edge of the pulse for the clock signal that CKH (n+1) is received starts to be filled with first voltage signal V1, in the second input CKH (n+
1) the first data wire of rising edge S1n of the pulse of the clock signal received stops charging.Compared with embodiment illustrated in fig. 8, data
The charging interval of line substantially shortens, and is advantageous to reduce the power consumption of display panel.
The driving method of the organic electroluminescence display panel of the application offer, each data micro USB are provided from Fig. 8 and Fig. 9
Electric time consistency, the brightness homogeneity of display picture can be ensured in display.
The embodiment of the present application additionally provides a kind of organic light-emitting display device, including above-mentioned organic electroluminescence display panel.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to the technology that the particular combination of above-mentioned technical characteristic forms
Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature
The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical scheme that the technical characteristic of energy is replaced mutually and formed.
Claims (15)
- A kind of 1. organic electroluminescence display panel, it is characterised in that including：A plurality of data lines, multiple pixel cells of connection corresponding with the data wire；Drive circuit, the drive circuit include multiple first multi-channel gating devices and multiple second multi-channel gating devices, and described first Multi-channel gating device electrically connects with the data wire, and second multi-channel gating device electrically connects with the data wire, wherein,The organic electroluminescence display panel includes data-signal write phase and glow phase within a frame period；In the data-signal write phase, first multi-channel gating device to a plurality of data wire, believe one by one by input data Number, in the glow phase, the pixel cell lights；Second multi-channel gating device after each data wire receives the data-signal, in the pixel cell Before luminous, first voltage signal is transmitted one by one to the data wire；The magnitude of voltage of the first voltage signal is less than the magnitude of voltage of the data-signal.
- 2. organic electroluminescence display panel according to claim 1, it is characterised in that also defeated including at least one data-signal Enter end and at least one first voltage signal input part；First multi-channel gating device includes multiple the first transistors, the first pole of each the first transistor and the data Signal input part connects；Second multi-channel gating device includes multiple second transistors, the first pole and described first of each second transistor Voltage signal inputs connect；Every data wire respectively with the second pole of the first transistor and a second transistor Two poles connect.
- 3. organic electroluminescence display panel according to claim 2, it is characterised in that connected in data wire described in same In the first transistor and the second transistor, the second transistor is led after the first transistor is switched on It is logical.
- 4. organic electroluminescence display panel according to claim 3, it is characterised in that connected in data wire described in same In the first transistor and the second transistor, when the second transistor is switched on, the first transistor is cut-off State.
- 5. organic electroluminescence display panel according to claim 2, it is characterised in that first multi-channel gating device also includes N first input end, the grid of each the first transistor are connected with a first input end respectively；Second multi-channel gating device also includes n the second inputs, and the grid of each second transistor is respectively with one The individual second input connection.
- 6. organic electroluminescence display panel according to claim 5, it is characterised in thatFirst first input end is used to receive the first clock signal；The signal that the signal and the i-th -1 first input end that i-th of first input end receives receive has an institute State the time difference of the pulsewidth of the first clock signal；First second input is used to receive second clock signal；The signal that the signal that j-th of second input receives receives with second input of jth -1 has an institute State the time difference of the pulsewidth of second clock signal；Wherein, i is integer and 2≤i≤n, j are integer and 2≤j≤n.
- 7. organic electroluminescence display panel according to claim 6, it is characterised in that the second clock signal is m-th The signal that the first input end receives, wherein, m is integer and 2≤m ＜ n.
- 8. organic electroluminescence display panel according to claim 7, it is characterised in that the second clock signal is second The signal that the first input end receives.
- 9. organic electroluminescence display panel according to claim 1, it is characterised in that the organic electroluminescence display panel includes Viewing area, first multi-channel gating device and second multi-channel gating device respectively outside the viewing area identical side or The different both sides of person.
- 10. organic electroluminescence display panel according to claim 9, it is characterised in that first multi-channel gating device and institute State the second multi-channel gating device and be located at described two relative outsides in viewing area respectively.
- 11. a kind of driving method of organic electroluminescence display panel, it is characterised in that the organic electroluminescence display panel includes a plurality of Data wire, the multiple pixel cells and drive circuit of connection corresponding with the data wire, the drive circuit include multiple the One multi-channel gating device and multiple second multi-channel gating devices, first multi-channel gating device electrically connect with the data wire, and described Two multi-channel gating devices electrically connect with the data wire；Methods described includes：Data-signal write phase within a frame period, by first multi-channel gating device to a plurality of data wire by One applies data-signal；Glow phase within a frame period, LED control signal is provided to the pixel cell so that the pixel cell is sent out Light；After each data wire receives the data-signal, before the pixel cell is luminous, by described Second multi-channel gating device applies first voltage signal one by one to the data wire；The magnitude of voltage of the first voltage signal is less than the magnitude of voltage of the data-signal.
- 12. driving method according to claim 11, it is characterised in that the drive circuit also includes at least one data Signal input part and at least one first voltage signal input part；First multi-channel gating device include multiple the first transistors and N first input end, the first pole of each the first transistor are connected with the data signal input, and each described first The grid of transistor is connected with a first input end respectively；Second multi-channel gating device includes multiple second transistors With n the second inputs, the first pole of each second transistor is connected with the first voltage signal input part, Mei Gesuo The grid for stating second transistor is connected with second input respectively；Every data wire respectively with one described Second pole of one transistor and the second pole connection of a second transistor；The driving method further comprises：The first clock signal is provided to first first input end；There is provided to i-th of first input end has described in one with the signal provided to the i-th -1 first input end The signal of the time difference of the pulsewidth of first clock signal；Second clock signal is provided to first second input；There is provided to j-th of second input has described in one with the signal provided to -1 second input of jth The signal of the time difference of the pulsewidth of second clock signal；Wherein, i is integer and 1≤i≤n, j are integer and 1≤j≤n.
- 13. driving method according to claim 12, it is characterised in that the second clock signal is m-th described the The signal that one input receives, wherein, m is integer and 2≤m ＜ n.
- 14. driving method according to claim 13, it is characterised in that the second clock signal is second described the The signal that one input receives.
- 15. a kind of organic light-emitting display device, it is characterised in that including the organic light emission as described in claim any one of 1-10 Display panel.
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| US11250787B2 (en) | 2018-02-02 | 2022-02-15 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Signal control apparatus and method, display control apparatus and method, and display apparatus |
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| CN108648680A (en) * | 2018-06-25 | 2018-10-12 | 厦门天马微电子有限公司 | A kind of display panel, its driving method, driving device and display device |
| CN108648681A (en) * | 2018-06-29 | 2018-10-12 | 厦门天马微电子有限公司 | A kind of display panel, its driving method, driving device and display device |
| CN108806586B (en) * | 2018-08-30 | 2021-06-22 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| TWI693586B (en) * | 2019-02-14 | 2020-05-11 | 友達光電股份有限公司 | Method for driving the multiplexer and display device |
| TWI727706B (en) * | 2020-03-17 | 2021-05-11 | 友達光電股份有限公司 | Display device |
| CN111696472B (en) * | 2020-07-13 | 2024-04-05 | 京东方科技集团股份有限公司 | Source electrode driving circuit, driving method thereof and display panel |
| CN111951727B (en) * | 2020-08-25 | 2022-10-18 | 昆山国显光电有限公司 | Display panel and display device |
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