CN105761675A - Organic light-emitting display panel and driving method thereof and organic light-emitting display device - Google Patents
Organic light-emitting display panel and driving method thereof and organic light-emitting display device Download PDFInfo
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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
Abstract
The invention discloses an organic light-emitting display panel and a driving method thereof and an organic light-emitting display device. The organic light-emitting display panel comprises multiple data lines and a driving circuit; multiple pixel units are correspondingly connected with the data lines; the driving circuit comprises multiple first multi-path selectors and multiple second multi-path selectors, the first multi-path selectors are electrically connected with the data lines, and the second multi-path selectors are electrically connected with the data lines; the organic light-emitting display panel comprises a data signal writing phase and a light emitting phase in a frame period; in the data signal writing phase, the first multi-path selectors transmit data signals to the data lines one by one, and in the light emitting phase, the pixel units emit light; the second multi-path selectors transmit first voltage signals to the data lines one by one after each data line receives the data signal and before the pixel units emit the light; the voltage values of the first voltage signals are smaller than those of the data signals. By means of the organic light-emitting display panel and the driving method thereof and the organic light-emitting display device, the uniformity of display brightness of the organic light-emitting display can be improved.
Description
Technical field
The application relates to Display Technique field, is specifically related to organic light emitting display technical field, particularly relates to organic electroluminescence display panel and driving method, organic light-emitting display device.
Background technology
OLED utilizes organic semiconducting materials self-luminous characteristic to display, and compared with liquid crystal display, OLED is without backlight, it is possible to effectively reduce the thickness of display screen.Generally, it is provided with, in the viewing area of OLED, the pel array being made up of sub-pixel.Each sub-pixel comprises an Organic Light Emitting Diode, by a pixel-driving circuit driven for emitting lights.
An existing class pixel-driving circuit can include switch transistors pipe and drive transistor, conducting under the control of switch transistors Guan Yi scanning signal, for the data signal transmitted on data wire is transferred to drive the source electrode of transistor.Driving transistor that the data signal that source electrode receives is transferred to drain electrode under the control of LED control signal, Organic Light Emitting Diode can carry out luminescence according to the electric current of the drain electrode output driving transistor.Display floater is provided with a plurality of data lines, and each data wire converges post-tensioning to driving IC (integratedcircuit, integrated circuit) at the step place of display floater.In order to reduce the cabling quantity at step place, the usual design adopting multi-channel gating device, within the time period that switch transistors pipe is switched on, multi-channel gating device can pass through a cabling with receiving data signal timesharing to a plurality of data lines outputting data signals.
Refer to Fig. 1, it illustrates the structural representation of existing a kind of multi-channel gating device.As it is shown in figure 1, multi-channel gating 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 one to one.Wherein, each data signal output connects data line S1, S2, S3, S4, S5, a S6 respectively.Fig. 2 show the working timing figure of the organic electroluminescence display panel comprising the multi-channel gating device shown in Fig. 1, wherein Scan is the scanning signal for controlling the switch transistors pipe in pixel-driving circuit, EMIT is that CK1, CK2, CK3, CK4, CK5, CK6 represent the clock pulse signal that clock signal input terminal CK1, CK2, CK3, CK4, CK5, CK6 input respectively for the LED control signal driving transistor controlling in pixel-driving circuit.Usual Scan is for controlling the switch transistors pipe in one-row pixels drive circuit, and Fig. 2 is with Scan when low level, and the switch transistors pipe in one-row pixels drive circuit is switched on and illustrates for example.As can be seen from Figure 2, in the time that switch transistors pipe in one-row pixels drive circuit is opened, the path that each clock signal controls between a plurality of data lines and the data signal input being connected with multi-channel gating device is switched on successively, in the time that path between a data line and data signal input is switched on, the pixel-driving circuit charging that this data alignment is corresponding.Owing to data wire existing very big parasitic capacitance (equivalent capacity etc. that the equivalent capacity such as formed with public electrode and public electrode wire are formed), after path between data wire and data signal input is disconnected, owing to the switch transistors pipe in one-row pixels drive circuit is still opened under the control of Scan, parasitic capacitance also can be corresponding on this data wire pixel-driving circuit charging, therefore the charging interval of every data line be the path between this data wire and data signal input be turned on to switch transistors pipe be cut off between time period.Thus causing in same a line sub-pixel, the Time Inconsistency of the different pieces of information alignment sub-pixel charging being connected with same multi-channel gating device so that the signal intensity being charged sub-pixel under pure color picture is inconsistent, thus produce the problem that display brightness is uneven.
Summary of the invention
In order to solve above-mentioned technical problem, this application provides organic electroluminescence display panel and driving method thereof.
First aspect, this application provides a kind of organic electroluminescence display panel, including: a plurality of data lines, multiple pixel cells of connection corresponding to data wire；Drive circuit, drive circuit includes multiple first multi-channel gating device and multiple second multi-channel gating device, first multi-channel gating device electrically connects with data wire, second multi-channel gating device electrically connects with data wire, wherein, organic electroluminescence display panel includes data signal write phase and glow phase within a frame period；In data signal write phase, the first multi-channel gating device transmits data signal one by one to a plurality of data lines, and in glow phase, pixel cell is luminous；Second multi-channel gating device, after each data line receives data signal, before pixel cell luminescence, transmits the first voltage signal one by one to data wire；The magnitude of voltage of the first voltage signal is less than the magnitude of voltage of data signal.
Second aspect, this application provides the driving method of a kind of organic electroluminescence display panel, organic electroluminescence display panel includes a plurality of data lines and drive circuit, drive circuit includes multiple first multi-channel gating device and multiple second multi-channel gating device, first multi-channel gating device electrically connects with data wire, and the second multi-channel gating device electrically connects with data wire；Driving method includes: the data signal write phase within a frame period, applies data signal one by one to a plurality of data lines by the first multi-channel gating device；Glow phase within a frame period, provides LED control signal so that pixel cell is luminous to pixel cell；After each data line receives data signal, before pixel cell luminescence, apply the first voltage signal one by one to data wire by the second multi-channel gating device；The magnitude of voltage of the 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 of the application offer and driving method, organic light-emitting display device, two multi-channel gating devices are utilized to carry out the input of data signal and the input of the first voltage signal respectively, the first voltage signal being filled with is utilized to control pixel-driving circuit drives transistor cutoff, thus promoting the concordance in each data wire charging interval, improve the homogeneity of OLED display brightness.
Accompanying drawing explanation
Non-limiting example being described in detail with reference to what the following drawings was made by reading, other features, purpose and advantage will become more apparent upon:
Fig. 1 is the structural representation of existing a kind of 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 an embodiment of the organic electroluminescence display panel that the application provides；
Fig. 4 is a structural representation of the pixel-driving circuit of the pixel cell in the organic electroluminescence display panel that the application provides；
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 of the organic electroluminescence display panel that the application provides；
Fig. 8 is the working timing figure of an embodiment of organic electroluminescence display panel shown in Fig. 5；
Fig. 9 is the working timing figure of an embodiment of organic electroluminescence display panel shown in Fig. 6 or Fig. 7.
Detailed description of the invention
Below in conjunction with drawings and Examples, the application is described in further detail.It is understood that specific embodiment described herein is used only for explaining related invention, but not the restriction to this invention.It also should be noted that, for the ease of describing, accompanying drawing illustrate only the part relevant to about invention.
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe the application below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Refer to Fig. 3, it illustrates the structural representation of an embodiment of the organic electroluminescence display panel that the application provides.As it is shown on figure 3, organic electroluminescence display panel 300 includes multiple pixel cells 32 and the drive circuit 33 of a plurality of data lines 31 connection corresponding to a plurality of data lines 31.Wherein drive circuit 33 includes multiple first multi-channel gating device and multiple second multi-channel gating device.Fig. 3 schematically shows two the first multi-channel gating devices 331 and 332 and two the second multi-channel gating devices 333 and 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.From figure 3, it can be seen that same data wire 31 is connected with first multi-channel gating device and second multi-channel gating device.
Organic electroluminescence display panel 300 within a frame period, include data signal write phase and glow phase.In data signal write phase, the first multi-channel gating device transmits data signal one by one to a plurality of data lines 31；In glow phase, pixel cell 32 is luminous.Second multi-channel gating device, after each data line 31 receives data signal, before pixel cell luminescence, transmits the first voltage signal one by one to data wire 31.Wherein, the magnitude of voltage of the first voltage signal is less than the magnitude of voltage of data signal.
With further reference to Fig. 4, it illustrates a structural representation of the pixel-driving circuit of pixel cell in the organic electroluminescence display panel that the application provides, namely illustrate the electrical block diagram of pixel cell 32 in organic electroluminescence display panel shown in Fig. 3.It should be noted that, in Fig. 4, the pixel-driving circuit of signal illustrates for P-type transistor circuit, Fig. 4, merely to technical scheme is described and the one of which structural representation of the pixel-driving circuit of pixel cell in the organic electroluminescence display panel that provides, should not cause the restriction for the present invention.
As shown in Figure 4, pixel cell 400 includes switch transistors pipe M1, drives 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, the first scanning signal input part Scan1, the second scanning signal input part Scan2, LED control signal input Emit, data signal input DATA, reference voltage signal input VREF and the second voltage signal inputs VDD.Wherein, the grid of switch transistors pipe M1 and the second scanning signal input part Scan2 connect, and first pole of switch transistors pipe M1 and the second pole are connected with first pole of data signal input Vdata and driving transistor M2 respectively；Drive the grid of transistor M2 and second pole of the 4th transistor M4 to connect, drive second pole of transistor M2 to be connected with first pole of the 6th transistor M6；The grid of third transistor M3 and the second scanning signal input part Scan2 connect, and first pole of third transistor M3 and the second pole are connected with the second pole of second pole of the 4th transistor M4 and driving transistor respectively；The grid of the 4th transistor M4 and the first scanning signal input part Scan1 connect, and first pole of the 4th transistor M4 is connected with reference voltage signal input VREF；The grid of the 5th transistor M5 is connected with LED control signal input Emit, and first pole of the 5th transistor M5 and the second pole are connected with the first pole driving transistor M2 and the second voltage signal inputs VDD respectively；The grid of the 6th transistor M6 is connected with LED control signal input Emit, and second pole of the 6th transistor M6 is connected with the positive pole of Organic Light Emitting Diode D1；The minus earth of Organic Light Emitting Diode D1.
Pixel-driving circuit shown in Fig. 4 can realize driving the threshold voltage compensation of transistor M2.Specifically, first stage in pixel-driving circuit work, switch transistors pipe M1 cut-off under the control of the second signal scanning signal input part Scan2 input, 5th transistor M5 and the six transistor M6 ends under the control of the LED control signal input Emit signal inputted, 4th transistor M4 conducting under the control of the first signal scanning signal input part Scan1 input, by the reference voltage signal input VREF signal Vref1 inputted transmission to the grid driving transistor M2, at this moment, the current potential Vg=Vref1 of the grid of transistor M2 is driven；In second stage, 4th transistor M4 cut-off under the control of the first signal scanning signal input part Scan1 input, 5th transistor M5 and the six transistor M6 ends under the control of the LED control signal input Emit signal inputted, switch transistors pipe M1 conducting under the control of the second signal scanning signal input part Scan2 input, by the data signal input DATA data signal Vdata1 inputted transmission to the first pole S driving transistor M2, at this moment, drive current potential Vg=Vdata1-| Vth | of the grid G of transistor M2, wherein Vth is the threshold voltage driving transistor M2, when being P-type transistor when driving transistor M2, Vth < 0；In the phase III, switch transistors pipe M1 cut-off under the control of the second signal scanning signal input part Scan2 input, 4th transistor M4 cut-off under the control of the first signal scanning signal input part Scan1 input, 5th transistor M5 turns under the control of the LED control signal input Emit signal inputted, by the second voltage signal VDD transmission to the first pole S driving transistor M2, at this moment, the current potential Vg driving the grid G of transistor M2 keeps Vdata1-| Vth |, Vsg-| Vth |=VDD-Vdata1 can be drawn, wherein, Vsg is the voltage difference between the first pole S and the grid G of driving transistor M2.When driving the size constancy of transistor M2, the leakage current driving transistor M2 output is directly proportional to (Vsg-| Vth |), then when the threshold voltage vt h driving transistor M2 changes, drive the leakage current of transistor M2 output without changing, thus realizing the compensation driving transistor threshold drift.
In the work schedule of above-mentioned pixel-driving circuit 400, receive data signal at second stage pixel-driving circuit, control organic light-emitting diode at phase III pixel-driving circuit.
When the pixel-driving circuit shown in Fig. 4 is applied in the pixel cell of display floater shown in Fig. 3, second multi-channel gating device can (such as in second stage) before the phase III of pixel-driving circuit work schedule, namely before pixel-driving circuit after data wire receives data signal, in pixel cell controls organic light-emitting diode, the first voltage signal can be applied successively to data wire.nullThe current potential driving the grid G of transistor M2 in second stage is Vg=Vdata1-| Vth |，Data signal input DATA receives the first voltage signal Vinit1 of data line transfer afterwards，The magnitude of voltage of the first voltage signal Vinit1 magnitude of voltage less than data signal Vdata1，Driving the potential difference between grid G and the source S of transistor M2 is Vsg=Vs-Vg=Vinit-Vdata1+ | Vth |，Thus Vsg-| Vth |=Vinit-Vdata1，Due to Vdata1 > Vinit1，So Vsg-| Vth | < 0，Namely the absolute value less than its threshold voltage of the potential difference between source S and the grid G of transistor M2 is driven，Driving transistor M2 is P-type transistor，At this moment transistor M2 is driven to be cut off，Parasitic capacitance on data wire cannot continue through driving transistor M2 charging.The time that pixel cell is electrically charged is that data wire starts to receive time to the data wire of data signal and receives the time of the first voltage signal.
For a plurality of data lines being connected with first multi-channel gating device, owing to adopting the mode transmitted one by one of timesharing to data line transfer data signal, and adopt mode that timesharing transmits one by one to data line transfer the first voltage signal, the time difference that each data wire received between the time of data signal and the time receiving the first voltage signal can be similar to or equal, namely difference between the actual charging interval of each data wire reduces, and effectively improves excessive due to data wire actual charging interval difference and that cause display brightness is uneven problem.
With reference to Fig. 5, it illustrates the structural representation of another embodiment of the organic electroluminescence display panel that the application provides.As it is shown in figure 5, organic electroluminescence display panel 500 includes multiple pixel cells 52 and the drive circuit 53 of a plurality of data lines 51 connection corresponding to a plurality of data lines 51.Wherein drive circuit 53 includes multiple first multi-channel gating device and multiple second multi-channel gating 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 wire 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, the organic electroluminescence display panel 500 that the present embodiment provides also includes at least one data signal input DATA1 and at least one first voltage signal inputs V1.In the present embodiment, the first multi-channel gating device 531/532 includes multiple the first transistor M51, and first pole of each the first transistor M51 is connected with a data signal input DATA1；Second multi-channel gating device 533/534 includes multiple transistor seconds M52, and first pole of each transistor seconds M52 is connected with a first voltage signal inputs V1.The a plurality of data lines 51 of organic electroluminescence display panel 500 includes S11, S12 ..., S1n, S21, S22 ..., S2N ..., and wherein every data line is connected with second pole of a first transistor M51 and second pole of a transistor seconds M52 respectively.
Further, the first multi-channel gating device 531 and 532 of organic electroluminescence display panel 500 all includes n first input end, for instance the first input end CKH11 shown in Fig. 5, CKH12 ..., CKH1n, n are positive integer.The grid of each the first transistor M51 is connected with a first input end respectively.Second multi-channel gating device 533 and 534 of organic electroluminescence display panel 500 all includes n the second input, for instance the second input CKH21 shown in Fig. 5, CKH22 ..., CKH2n.The grid of each transistor seconds M52 is connected with second input respectively.
In the present embodiment, first first input end is used for receiving the first clock signal, and the signal of i-th first input end reception and the signal of the i-th-1 first input end reception have the time difference of the pulsewidth of first clock signal；First the second input is used for receiving second clock signal；The signal that-1 the second input of the signal that jth the second input receives and jth receives has the time difference of the pulsewidth of a second clock signal；Wherein, i is integer and 2≤i≤n, j is integer and 2≤j≤n.It is to say, in first input end CKH11, CKH12 ..., CKH1n, the time difference between clock signal and the clock signal of previous first input end input of each first input end input is the pulsewidth length of the first clock signal；In second input CKH21, CKH22 ..., CKH2n, the time difference between clock signal and the clock signal of previous second input input of each second input input is the pulsewidth length of second clock signal.Thus, a plurality of data lines being connected with same first multi-channel gating device can transmit the signal of data signal input input one by one within the time driving transistor to be switched on to pixel cell.
In the present embodiment, every data line 51 (such as S1k, k are positive integer and k≤n) connects second pole of a first transistor M51 and second pole of a transistor seconds M52.With same data wire S1k or the S2k the first transistor M51 being connected and transistor seconds M52, transistor seconds M52 is switched on after the first transistor M51.When the first transistor M51 is switched on, data wire S1k receives the signal of data signal input DATA1 input, and when transistor seconds M52 turns on, data wire S1k receives the signal of the first voltage signal inputs V1 input.The signal of data signal input DATA1 input is data signal, is the display drive signals of pixel cell；First voltage signal inputs V1 input is the first voltage signal, and the magnitude of voltage of the first voltage signal is less than the magnitude of voltage of data signal.
Further, in the first transistor M51 connected at same data wire 51 (such as S1k, k are positive integer and k≤n) and transistor seconds M52, when transistor seconds M52 is switched on, the first transistor M51 is cut-off state.It is to say, when data wire S1k receives the first voltage signal, do not receive data signal.In other words, data wire S1k, after receiving data signal, receives the first voltage signal.nullOwing to the magnitude of voltage of the first voltage signal is less than the magnitude of voltage of data signal，Structural representation according to pixel-driving circuit described in conjunction with Figure 4，Before the signal of LED control signal input Emit input controls the 6th transistor M6 conducting，It is Vg=Vdata1-| Vth | owing to driving transistor M2 grid potential，It is cut off inputting the first voltage signal Vinit1 rear drive transistor M2 to data signal input VDATA，At this moment the signal on data wire S1k cannot transmit the anode to light emitting diode D1，Namely the charging process of data wire S1k is terminated by the first voltage signal Vinit1 of the second multi-channel gating device 533 input，The current potential driving second pole of transistor M6 is maintained at the current potential before the corresponding data wire S1k transistor seconds M52 connected is switched on.
In a further embodiment, the second clock signal that the grid of first transistor seconds M52 receives is the m-th first input end CK1m signal received, and wherein, m is integer and 2≤m < n.Time difference between the signal that time is first first input end CK11 signal received and m-th first input end CK1m reception that then every data line is filled with data signal.
In the present embodiment, owing to the time difference between the clock signal that each first input end inputs is equal, time difference between the clock signal of each second input input is equal, so each data wire receives data signal and the time difference received between the first voltage signal is equal, the time making the data alignment pixel-driving circuit effective data signal of input is equal, thus solving the problem that the display brightness caused due to difference of each data wire charging interval is uneven, it is possible to be effectively improved the quality of pure color display picture.
In a further embodiment, second clock signal is the signal that second first input end receives.With further reference to Fig. 6, it illustrates the structural representation of another embodiment of the organic electroluminescence display panel that the application provides.
As shown in Figure 6, organic electroluminescence display panel 600 includes multiple pixel cells 62 and the drive circuit 63 of a plurality of data lines 61 connection corresponding to a plurality of data lines 61.Wherein drive circuit 63 includes multiple first multi-channel gating device and multiple second multi-channel gating device.Wherein, data wire 61 includes S11, S12 ..., S1n, S21, S22 ..., S2n ..., and Fig. 6 schematically shows 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 and data wire S11, S12 ..., S1n electrical connection, first multi-channel gating device 632 and data wire S21, S22 ..., S2n electrical connection, second multi-channel gating device 633 and data wire S11, S12 ..., S1n electrical connection, the second multi-channel gating device 634 and data wire S21, S22 ..., S2n electrical connection.Same data wire 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 all includes n first input end, for instance the first input end CKH1 shown in Fig. 6, CKH2 ..., CKHn, n are positive integer.The grid of each the first transistor M61 is connected with a first input end respectively.Second multi-channel gating device 633 and 634 of organic electroluminescence display panel 600 all includes n the second input, for instance the second input CKH2 shown in Fig. 6, CKH3 ..., CKH (n+1).The grid of each transistor seconds M62 is connected with second input respectively.
With embodiment illustrated in fig. 5 the difference is that, for the embodiment shown in Fig. 6, in the first transistor M61 being connected with same data wire 61 and transistor seconds M62, the grid of the first transistor M61 that the grid of transistor seconds M62 and next data line 61 connect is connected to identical first input end or the second input.In Fig. 6, n in second multi-channel gating device 633 the second input respectively CKH2, CKH3 ..., CKH (n+1), it is to say, the second input of the second multi-channel gating device 633 can be same input with the first input end in the first multi-channel gating device 631.In actual applications, the grid of the s transistor seconds M62 and the grid of (s+1) individual the first transistor M61 are connected to a clock signal input terminal, and wherein s is positive integer and s < n；The grid of the n-th transistor seconds M62 can be connected to (n+1) individual clock signal input terminal, has the time difference of the pulsewidth of a clock signal between signal and the clock signal of the n-th first input end CKn input of (n+1) individual clock signal input terminal input.The pulsewidth length that time is first input end CKH1k or the second input CKH2k clock signal received that then every data line 61 is filled with data signal, wherein, k is positive integer and k≤n.After this pulsewidth length, data wire 61 is charged the first voltage signal immediately, the charging interval making every data line 61 is all only the time of the pulsewidth of a clock signal, compared to embodiment illustrated in fig. 5, the data wire charging interval shortens, and can also reduce the power consumption of display floater while solving the brightness uniformity of display picture.
The organic electroluminescence display panel that each embodiment of the application provides all includes viewing area, and pixel cell is arranged in viewing area.In the above-described embodiments, the first multi-channel gating device and the second multi-channel gating device lay respectively at the different both sides outside viewing area.Further, the first multi-channel gating device and the second multi-channel gating device can lay respectively at two relative outsides of viewing area.
It should be noted that, although above embodiments only show the first multi-channel gating device and the second multi-channel gating device laying respectively at the embodiment in two relative outsides of viewing area, but in concrete implementation, first multi-channel gating device and the second multi-channel gating device can lay respectively at irrelative two sides outside viewing area, and this is repeated no more by the application.
In further embodiments, the first multi-channel gating device and the second multi-channel gating device may be located at the same side outside viewing area.With continued reference to Fig. 7, it illustrates the structural representation of the further embodiment of the organic electroluminescence display panel that the application provides.
As it is shown in fig. 7, organic electroluminescence display panel 700 includes multiple pixel cells 72 and the drive circuit 73 of a plurality of data lines 71 connection corresponding to a plurality of data lines 71.Wherein, data wire 71 includes S11, S12 ..., S1n, S21, S22 ..., S2n ..., and drive circuit 73 includes multiple first multi-channel gating device and multiple second multi-channel gating device.Fig. 7 schematically shows 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 electrically connects with data wire 71, and the second multi-channel gating device electrically connects with data wire 72.Same data wire 71 is connected with first multi-channel gating device and second multi-channel gating device.
Further, the first multi-channel gating device 731 and 732 of organic electroluminescence display panel 700 all includes n first input end, for instance the first input end CKH1 shown in Fig. 7, CKH2 ..., CKHn.The grid of each the first transistor M71 is connected with a first input end respectively.Second multi-channel gating device 733 and 734 of organic electroluminescence display panel 700 all includes n the second input, for instance the second input CKH2 shown in Fig. 7, CKH3 ..., CKH (n+1).The grid of each transistor seconds M72 is connected with second input respectively.
From figure 7 it can be seen that with embodiment illustrated in fig. 6 the difference is that, in the embodiment shown in Fig. 7, the first multi-channel gating device and the second multi-channel gating device are positioned at the same side outside the viewing area of organic electroluminescence display panel 700.First multi-channel gating device and the second multi-channel gating device are arranged at the same side outside viewing area and can simplify the cabling in drive circuit, be conducive to the steady operation of drive circuit, and the area of non-display area can be reduced.
Present invention also provides the driving method of organic electroluminescence display panel, for driving the organic electroluminescence display panel in the various embodiments described above.Specifically, organic electroluminescence display panel can include multiple pixel cells and the drive circuit of a plurality of data lines connection corresponding to data wire.Drive circuit includes multiple first multi-channel gating device and multiple second multi-channel gating device.First multi-channel gating device electrically connects with data wire, and the second multi-channel gating device electrically connects with data wire.
The driving method being applied to above-mentioned organic electroluminescence display panel includes: the data signal write phase within a frame period, applies data signal one by one to a plurality of data lines by the first multi-channel gating device；Glow phase within a frame period, provides LED control signal so that pixel cell is luminous to pixel cell；After each data line receives data signal, before pixel cell luminescence, apply the first voltage signal one by one to data wire by the second multi-channel gating device.Wherein, the magnitude of voltage of the first voltage signal is less than the magnitude of voltage of data signal.
In the present embodiment, data signal write phase, the first multi-channel gating device timesharing ground transmits data signal to a plurality of data lines.Owing to the parasitic capacitance on data wire is bigger, when the path between data signal input and data wire is disconnected by the first multi-channel gating device, parasitic capacitance on data wire can persistently be charged to data wire, by receiving rear first voltage signal less than the magnitude of voltage of data signal to data wire applying of data signal at data wire, after data wire charges a period of time, the voltage on data wire can be maintained the magnitude of voltage of the first voltage signal, the problem of the display picture brightness inequality avoiding different pieces of information line charging interval difference to cause the magnitude of voltage driving pixel cell to display different and to cause.
In some optional embodiments, drive circuit also includes at least one data signal input and at least one first voltage signal inputs.First multi-channel gating device includes multiple the first transistor and n first input end, and the first pole of each the first transistor 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 transistor seconds and n the second input, and the first pole of each transistor seconds is connected with the first voltage signal inputs, and the grid of each transistor seconds is connected with second input respectively；Every data line is connected with the second pole of a first transistor and the second pole of a transistor seconds respectively.Driving method farther includes: provide the first clock signal to first first input end；The signal of the time difference of the pulsewidth with the signal provided to the i-th-1 first input end with first clock signal is provided to i-th first input end；Second clock signal is provided to first the second input；The signal of the time difference of the pulsewidth with the signal provided to-1 the second input of jth with a second clock signal is provided to jth the second input.Wherein, i is integer and 1≤i≤n, j is integer and 1≤j≤n.
In the above-described embodiments, it is possible to provide clock signal to each first input end one by one, the delay of a clock pulses is provided between the clock signal of two adjacent first input ends offers.Clock signal can be provided to each second input one by one, there is the delay of a clock pulses between the clock signal that two adjacent the second inputs provide.The first transistor controlled in first multi-channel gating device by the clock signal provided to first input end is sequentially turned on, and then successively to data line transfer data signal；The transistor seconds controlled in second multi-channel gating device by the clock signal provided to the second input is sequentially turned on, and then successively to data line transfer the first voltage signal after data wire receives data signal, control magnitude of voltage that the magnitude of voltage on data wire is the first voltage signal, and each data wire be filled with time of data signal can be equal, thus ensureing that the amplitude being filled with the display drive signals of pixel cell is consistent, solve the problem that display picture brightness is uneven.
Further, the second clock signal provided to first the second input is the signal that m-th first input end receives, and wherein, m is integer and 2≤m < n.Alternatively, the second clock signal provided to first the second input is the signal that second first input end receives.At this moment, data wire receives the pulsewidth length that the time is the first clock signal of data signal, compared to above-described embodiment, the present embodiment further shorten the charging interval of data wire, the power consumption of display floater can also be reduced while solving the brightness uniformity of display picture.
It is further detailed below in conjunction with Fig. 8 and Fig. 9 driving method that the application is provided.
Refer to Fig. 8, it illustrates the working timing figure of organic electroluminescence display panel shown in Fig. 5 a embodiment.Pixel cell 52 in organic electroluminescence display panel 500 displays under the control of scanning signal Scan and LED control signal EMIT.In first multi-channel gating device 531, multiple the first transistor M51 are controlled by the signal of first input end CKH11, CKH12 ... CKH1n input respectively, in second multi-channel gating device 533, multiple transistor seconds M52 are controlled by the signal of the second input CKH21, CKH22 ... CKH2n input respectively.As shown in Figure 8, there is between the clock signal of first input end CKH11, CKH12 ... CKH1n input the delay of a clock pulse width one by one, there is between the signal of the second input CKH21, CKH22 ... CKH2n input the delay of a second clock pulsewidth one by one.As shown in Figure 8, first data wire S11 starts to be filled with data signal DATA1 at the trailing edge of the pulse of first first input end CKH11 clock signal received, until the trailing edge of the pulse of the clock signal of first the second input CKH21 reception starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S11 of the pulse of the second input CKH21 clock signal received.The like, second data wire S12 starts to be filled with data signal DATA1 at the trailing edge of the pulse of second first input end CKH12 clock signal received, until the trailing edge of the pulse of the clock signal of second the second input CKH22 reception starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S12 of the pulse of the second input CKH22 clock signal received；N-th data wire S1n starts to be filled with data signal DATA1 at the trailing edge of the pulse of the n-th first input end CKH1n clock signal received, until the trailing edge of the pulse of clock signal that the n-th the second input CKH2n receive starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S1n of the pulse of the second input CKH2n clock signal received.
Refer to Fig. 9, it illustrates the working timing figure of the embodiment being organic electroluminescence display panel shown in Fig. 6 or Fig. 7.Pixel cell 62 in organic electroluminescence display panel 600 displays under the control of scanning signal Scan and LED control signal EMIT.In first multi-channel gating device 631, multiple the first transistor M61 are controlled by the signal of first input end CKH1, CKH2 ... CKHn input respectively, in second multi-channel gating device 633, the signal that multiple transistor seconds M62 are inputted by the second input CKH2, CKH3 ... CKH (n+1) respectively controls.As shown in Figure 9, there is between the clock signal of first input end CKH1, CKH2 ... CKHn input the delay of a clock pulse width one by one, there is between the signal that the second input CKH2, CKH3 ... CKH (n+1) input the delay of a second clock pulsewidth one by one.The transistor seconds M62 that every data line connects is controlled by the clock signal controlling the first transistor M61 that a upper data line connects.As shown in Figure 9, first data wire S11 starts to be filled with data signal DATA1 at the trailing edge of the pulse of first first input end CKH1 clock signal received, until the trailing edge of the pulse of the clock signal of first the second input CKH2 reception starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S11 of the pulse of the second input CKH2 clock signal received.The like, second data wire S12 starts to be filled with data signal DATA1 at the trailing edge of the pulse of second first input end CKH2 clock signal received, until the trailing edge of the pulse of the clock signal of second the second input CKH3 reception starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S12 of the pulse of the second input CKH3 clock signal received；N-th data wire S1n starts to be filled with data signal DATA1 at the trailing edge of the pulse of the n-th first input end CKHn clock signal received, until the trailing edge of the pulse of clock signal that the n-th the second input CKH (n+1) receive starts to be filled with the first voltage signal V1, stop charging at rising edge the first data wire S1n of the pulse of the second input CKH (n+1) clock signal received.Compared with embodiment illustrated in fig. 8, the charging interval of data wire substantially shortens, and is conducive to reducing the power consumption of display floater.
From Fig. 8 and Fig. 9 it can be seen that the driving method of the organic electroluminescence display panel of the application offer, each data wire charging interval is consistent, ensure that the brightness homogeneity of display picture when 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.Skilled artisan would appreciate that, invention scope involved in the application, it is not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, when also should be encompassed in without departing from described inventive concept simultaneously, other technical scheme being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed.Such as features described above and (but not limited to) disclosed herein have the technical characteristic of similar functions and replace mutually and the technical scheme that formed.
Claims (15)
1. an organic electroluminescence display panel, it is characterised in that including:
A plurality of data lines, multiple pixel cells of connection corresponding to described data wire；
Drive circuit, described drive circuit includes multiple first multi-channel gating device and multiple second multi-channel gating device, and described first multi-channel gating device electrically connects with described data wire, and described second multi-channel gating device electrically connects with described data wire, wherein,
Described organic electroluminescence display panel includes data signal write phase and glow phase within a frame period；
In described data signal write phase, described first multi-channel gating device is to a plurality of described data wire transmission of data signal one by one, and in described glow phase, described pixel cell is luminous；
Described second multi-channel gating device, after each described data wire receives described data signal, before described pixel cell luminescence, transmits the first voltage signal one by one to described data wire；
The magnitude of voltage of described first voltage signal is less than the magnitude of voltage of described data signal.
2. organic electroluminescence display panel according to claim 1, it is characterised in that also include at least one data signal input and at least one first voltage signal inputs；
Described first multi-channel gating device includes multiple the first transistor, and the first pole of each described the first transistor is connected with described data signal input；
Described second multi-channel gating device includes multiple transistor seconds, and the first pole of each described transistor seconds is connected with described first voltage signal inputs；
Every described data wire is connected with the second pole of a described the first transistor and the second pole of a described transistor seconds respectively.
3. organic electroluminescence display panel according to claim 2, it is characterised in that in the described the first transistor and described transistor seconds of data wire connection described in same, described transistor seconds is switched on after described the first transistor.
4. organic electroluminescence display panel according to claim 3, it is characterised in that in the described the first transistor and described transistor seconds of data wire connection described in same, when described transistor seconds is switched on, described the first transistor is cut-off state.
5. organic electroluminescence display panel according to claim 2, it is characterised in that described first multi-channel gating device also includes n first input end, the grid of each described the first transistor is connected with a described first input end respectively；
Described second multi-channel gating device also includes n the second input, and the grid of each described transistor seconds second input described with respectively is connected.
6. organic electroluminescence display panel according to claim 5, it is characterised in that
First described first input end is used for receiving the first clock signal；
The signal of first input end reception described in i-th and the signal of the i-th-1 described first input end reception have the time difference of the pulsewidth of described first clock signal；
First described second input is used for receiving second clock signal；
The signal that the signal that second input described in jth receives second input described with jth-1 receives has the time difference of the pulsewidth of a described second clock signal；
Wherein, i is integer and 2≤i≤n, j is integer and 2≤j≤n.
7. organic electroluminescence display panel according to claim 6, it is characterised in that described second clock signal is the signal that first input end described in m-th receives, and wherein, m is integer and 2≤m < n.
8. organic electroluminescence display panel according to claim 7, it is characterised in that described second clock signal is the signal that second described first input end receives.
9. organic electroluminescence display panel according to claim 1, it is characterized in that, described organic electroluminescence display panel includes viewing area, and described first multi-channel gating device lays respectively at side identical outside described viewing area or different both sides with described second multi-channel gating device.
10. organic electroluminescence display panel according to claim 9, it is characterised in that described first multi-channel gating device lays respectively at relative outside, two, described viewing area with described second multi-channel gating device.
11. the driving method of an organic electroluminescence display panel, it is characterized in that, described organic electroluminescence display panel includes multiple pixel cells and the drive circuit of a plurality of data lines connection corresponding to described data wire, described drive circuit includes multiple first multi-channel gating device and multiple second multi-channel gating device, described first multi-channel gating device electrically connects with described data wire, and described second multi-channel gating device electrically connects with described data wire；Described method includes:
Data signal write phase within a frame period, applies data signal by described first multi-channel gating device one by one to a plurality of described data wire；
Glow phase within a frame period, provides LED control signal so that described pixel cell is luminous to described pixel cell；
After each described data wire receives described data signal, before described pixel cell luminescence, apply the first voltage signal by described second multi-channel gating device one by one to described data wire；
The magnitude of voltage of described first voltage signal is less than the magnitude of voltage of described data signal.
12. driving method according to claim 11, it is characterised in that described drive circuit also includes at least one data signal input and at least one first voltage signal inputs；Described first multi-channel gating device includes multiple the first transistor and n first input end, and the first pole of each described the first transistor is connected with described data signal input, and the grid of each described the first transistor is connected with a described first input end respectively；Described second multi-channel gating device includes multiple transistor seconds and n the second input, and the first pole of each described transistor seconds is connected with described first voltage signal inputs, and the grid of each described transistor seconds second input described with respectively is connected；Every described data wire is connected with the second pole of a described the first transistor and the second pole of a described transistor seconds respectively；
Described driving method farther includes:
The first clock signal is provided to first described first input end；
The signal of the time difference of the pulsewidth with the signal provided to the i-th-1 described first input end with described first clock signal is provided to first input end described in i-th；
Second clock signal is provided to first described second input；
The signal of the time difference of the pulsewidth with the signal provided to described second input of jth-1 with a described second clock signal is provided to the second input described in jth；
Wherein, i is integer and 1≤i≤n, j is integer and 1≤j≤n.
13. driving method according to claim 12, it is characterised in that described second clock signal is the signal that first input end described in m-th receives, and wherein, m is integer and 2≤m < n.
14. driving method according to claim 13, it is characterised in that described second clock signal is the signal that second described first input end receives.
15. an organic light-emitting display device, it is characterised in that include the organic electroluminescence display panel as described in any one of claim 1-10.
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| CN108806586A (en) * | 2018-08-30 | 2018-11-13 | 厦门天马微电子有限公司 | Display panel, its driving method 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 |
| CN110491327A (en) * | 2019-02-14 | 2019-11-22 | 友达光电股份有限公司 | Multiplexer driving method and display device |
| TWI727706B (en) * | 2020-03-17 | 2021-05-11 | 友達光電股份有限公司 | Display device |
| CN111696472A (en) * | 2020-07-13 | 2020-09-22 | 京东方科技集团股份有限公司 | Source electrode driving circuit, driving method thereof and display panel |
| 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 |
| CN111951727A (en) * | 2020-08-25 | 2020-11-17 | 昆山国显光电有限公司 | Display panel and display device |
| US11727849B2 (en) | 2020-08-25 | 2023-08-15 | Kunshan Go-Visionox Opto-Electronics Co., Ltd | Display panel and display apparatus |
| CN112201198A (en) * | 2020-10-21 | 2021-01-08 | 合肥京东方卓印科技有限公司 | Multi-path selection circuit, multi-path selector, driving method, display panel and device |
| US11769445B2 (en) | 2020-10-21 | 2023-09-26 | Hefei Boe Joint Technology Co., Ltd. | Multiplexer circuit, multiplexer, driving method, display panel, and display apparatus |
| CN114299865A (en) * | 2021-12-31 | 2022-04-08 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| US11610539B2 (en) | 2021-12-31 | 2023-03-21 | Hubei Yangtze Industrial Innovation Center of Advanced Display Co., Ltd. | Display panel and display device |
| CN114863873A (en) * | 2022-04-29 | 2022-08-05 | 武汉天马微电子有限公司 | Display panel and display device |
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