CN106782329B - A kind of organic light emitting display panel and its driving method - Google Patents

A kind of organic light emitting display panel and its driving method Download PDF

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Publication number
CN106782329B
CN106782329B CN201611097703.6A CN201611097703A CN106782329B CN 106782329 B CN106782329 B CN 106782329B CN 201611097703 A CN201611097703 A CN 201611097703A CN 106782329 B CN106782329 B CN 106782329B
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reset signal
transistor
driving
organic light
light emitting
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CN106782329A (en
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蔡晓波
翟应腾
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Tianma Microelectronics Co Ltd
Shanghai Tianma Microelectronics Co Ltd
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Tianma Microelectronics Co Ltd
Shanghai Tianma Microelectronics Co Ltd
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • G09G3/3258Control 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 voltage across the light-emitting element

Abstract

The present invention describes a kind of organic light emitting display panel and its driving method.Organic light emitting display panel includes viewing area and non-display area, and viewing area includes multirow pixel unit, and every row pixel unit includes multiple pixel-driving circuits;Non-display area includes multiple reset signal converting units, multistage first scan drive circuit, multistage second scan drive circuit, at least one the first resetting voltage transmission lines and at least one the second resetting voltage transmission lines;Wherein, reset signal converting unit includes the first reset signal switch and the second reset signal switch;First reset signal switch is for providing the first resetting voltage to pixel-driving circuit;Second reset signal switch is for providing the second resetting voltage to pixel-driving circuit;First resetting voltage is greater than the second resetting voltage.The application can provide different resetting voltages by driving transistor from setting reset signal converting unit to pixel-driving circuit and Organic Light Emitting Diode, improve display effect.

Description

A kind of organic light emitting display panel and its driving method
Technical field
The present invention relates to display field, in particular to a kind of organic light emitting display panel and its driving method.
Background technique
In display technology, organic light emitting diode display (Organic Light Emitting Diode, OLED) It is frivolous with its, actively shine, fast-response speed, wide viewing angle, rich in color and high brightness, low-power consumption, high-low temperature resistant etc. it is numerous excellent It puts and is known as being the third generation display skill after liquid crystal display (Liquid Crystal Display, LCD) by industry Art.
OLED display is mainly that current-control type shines at present, and uniformity of luminance is by corresponding current control.But by It easily drifts about in the threshold voltage of the driving transistor of each pixel of OLED display with the variation of time, so that identical Data-signal under, the electric current for flowing through OLED, which deviates, causes display brightness uneven;The luminous effect of OLED device itself simultaneously Rate can also degenerate with the time, so that light emission luminance reduces under identical electric current, reduce the display effect of display.
Summary of the invention
In view of this, the present invention provides a kind of organic light emitting display panel and its driving method, to solve in the prior art Because showing uneven problem caused by the reasons such as threshold voltage shift and device degradation.
On the one hand, the present invention provides a kind of organic light emitting display panel, comprising: viewing area and non-display area, the display Area includes multirow pixel unit, and pixel unit described in every row includes multiple pixel-driving circuits;The non-display area includes multiple Reset signal converting unit, multistage first scan drive circuit, multistage second scan drive circuit, the first resetting voltage transmission line With the second resetting voltage transmission line;Wherein, the reset signal converting unit includes that the first reset signal switch and second reset Signaling switch;The first reset signal switch is for providing the first resetting voltage to the pixel-driving circuit;Described second Reset signal switch is for providing the second resetting voltage to the pixel-driving circuit;First resetting voltage is greater than described the Two resetting voltages.
On the other hand, the present invention also provides a kind of driving methods, for driving above-mentioned organic light emitting display panel, the drive Dynamic method includes the first reseting stage and the second reseting stage, in first reseting stage, the first reset signal switch To the pixel-driving circuit provide the first resetting voltage, in second reseting stage, second reset signal switch to The pixel-driving circuit provides the second resetting voltage, and first resetting voltage is greater than second resetting voltage.
Compared with prior art, the present invention at least has the advantages that one of prominent as follows:
The embodiment of the present invention can be to the grid and organic luminescent device of the driving transistor of organic light emitting display panel Anode provides different reset signals, promotes the display effect of dark-state, can be avoided driving transistor threshold voltage shift and The problem that organic luminescent device aging causes display uneven.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.
Fig. 1 is a kind of display panel structure schematic diagram provided in an embodiment of the present invention;
Fig. 2 is a kind of pixel-driving circuit structural schematic diagram provided in an embodiment of the present invention;
Fig. 3 is the electric connection mode schematic diagram of pixel-driving circuit shown in Fig. 2 Yu reset signal converting unit;
Fig. 4 is the concrete structure schematic diagram of pixel-driving circuit shown in Fig. 2
Fig. 5 is the electric connection mode schematic diagram of pixel-driving circuit shown in Fig. 4 Yu reset signal converting unit;
Fig. 6 is the working timing figure of pixel-driving circuit shown in Fig. 5;
Fig. 7 is the side of electrical connection of another pixel-driving circuit and reset signal converting unit provided in an embodiment of the present invention Formula schematic diagram;
The working timing figure of pixel-driving circuit shown in Fig. 8 Fig. 7.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with attached drawing and implementation The present invention will be further described for example.
It should be noted that elaborating detail in the following description to fully understand the present invention.But this hair Bright to be different from other way described herein with a variety of and be implemented, those skilled in the art can be without prejudice in the present invention Similar popularization is done in the case where culvert.Therefore the present invention is not limited by the specific embodiments disclosed below.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of organic light emitting display panel provided in an embodiment of the present invention.Have Machine light emitting display panel includes: viewing area 200 and non-display area 400, and wherein viewing area 200 includes multirow pixel unit 210, often Row pixel unit 210 includes multiple pixel-driving circuits 211;Non-display area 400 include multiple reset signal converting units 410, Multistage first scan drive circuit 412, multistage second scan drive circuit 414, the first resetting voltage transmission line 416 and second are multiple Position voltage transmission line 418.Wherein, reset signal converting unit 410 includes that the first reset signal switch 4111 and second resets letter Number switch 4112;First reset signal switch 4111 is used to provide the first resetting voltage to pixel-driving circuit 211;Second resets Signaling switch 4112 is used to provide the second resetting voltage to pixel-driving circuit 211.First resetting voltage in the embodiment of the present invention Greater than the second resetting voltage.
Organic light emitting display panel provided in an embodiment of the present invention, can be to pixel by setting reset signal converting unit Driving circuit provides different resetting voltages, meets the needs of different components are to different resetting voltages in pixel-driving circuit, mentions High display effect.
Fig. 2 is a kind of pixel-driving circuit structural schematic diagram provided in an embodiment of the present invention, Fig. 3 be pixel-driving circuit with The electric connection mode schematic diagram of reset signal converting unit.Pixel-driving circuit includes driving transistor DT and organic light-emitting diodes Pipe EL, driving transistor be used for Organic Light Emitting Diode provide driving current, Organic Light Emitting Diode include anode, cathode with And the luminescent material between anode and cathode.In actual application, after working long hours, transistor threshold is driven Voltage is also easy to produce drift, while aging can also occur for organic light emitting diode device.Therefore, in order to avoid the threshold of driving transistor The problem that threshold voltage drift and the aging of Organic Light Emitting Diode bring display uneven, general pixel-driving circuit are required to drive The grid of dynamic transistor, the anode of Organic Light Emitting Diode are resetted again, that is, allow pixel-driving circuit in every task The grid potential of driving transistor is identical, Organic Light Emitting Diode anode potential is identical.
Under normal circumstances, reset needed for reset signal needed for driving transistor gate and Organic Light Emitting Diode anode Signal is not identical, and by taking PMOS pixel circuit as an example, resetting voltage needed for driving transistor gate is normally close to 0V, and organic hair The threshold voltage of optical diode device is 1~2V, and the characteristic reversely ended according to diode forward conducting is it is found that organic light emission two The anode resetting voltage of pole pipe cannot be greater than the sum of cathode voltage and the threshold voltage of organic light emitting diode device, and organic hair The cathode voltage of optical diode is generally in -5V or so, in this way, in order to guarantee Organic Light Emitting Diode cut-off, organic light-emitting diodes The anode resetting voltage of pipe cannot be greater than -3V.As described above, resetting voltage needed for driving transistor gate is normally close to 0V, And the anode resetting voltage of Organic Light Emitting Diode cannot be greater than -3V, when be supplied to driving transistor gate reset signal and When the reset signal of Organic Light Emitting Diode anode is identical, can generate driving transistor gate can not be initialized or organic hair There is the not dark problem of dark-state in optical diode conducting.
Organic light emitting display panel provided in an embodiment of the present invention is turned by setting reset signal converting unit, reset signal Change unit include the first reset signal switch with the second reset signal switch, the first reset signal switch for driving transistor First resetting voltage is provided;Second reset signal is switched for providing the second resetting voltage to the Organic Light Emitting Diode, and First resetting voltage is greater than the second resetting voltage.Design i.e. of the invention can guarantee in pixel-driving circuit drive transistor and Demand of the Organic Light Emitting Diode to different resetting voltages, the problem for avoiding dark-state not dark.
Specifically, with reference to Fig. 3, reset signal converting unit provided in an embodiment of the present invention is switched including the first reset signal 4111 and the second reset signal switch 4112.First reset signal switch 4111 includes control terminal a1, input terminal a2, output end A3, the second reset signal switch 4112 include control terminal b1, input terminal b2, output end b3.Wherein, the first reset signal switchs 4111 control terminal a1 is electrically connected with the first scan drive circuit 412, input terminal a2 is electrically connected with the first resetting voltage transmission line 416 It connects, output end a3 is electrically connected with the driving transistor DT of pixel-driving circuit 211;The control terminal of second reset signal switch 4112 B1 is electrically connected with the second scan drive circuit 414, input terminal b2 is electrically connected with the second resetting voltage transmission line 418, output end b3 It is electrically connected with the anode of the Organic Light Emitting Diode EL of pixel-driving circuit 211.When the conducting of the first reset signal switch 4111, The first resetting voltage that first resetting voltage transmission line 416 transmits is transferred to pixel driver electricity by the first reset signal switch 4111 Road 211;When the conducting of the second reset signal switch 4112, the second reset signal switch 4112 is by the second resetting voltage transmission line Second resetting voltage of 418 transmission is transferred to pixel-driving circuit 211.First resetting voltage is greater than the second resetting voltage.Have Machine light emitting display panel can provide two by the way that reset signal converting unit is arranged respectively to pixel-driving circuit and different answer Position voltage, meets the needs of driving transistor gate and Organic Light Emitting Diode anode are to different resetting voltages.
With continued reference to FIG. 3, pixel-driving circuit 211 is by reference to voltage signal line L in the embodiment of the present inventionrefWith it is multiple Position signal switch (4111 and 4112) realizes electrical connection.Preferably, it is only set on display panel provided in an embodiment of the present invention Set a reference voltage signal line LrefReference voltage is transmitted to all pixel-driving circuits.Simultaneously as the embodiment of the present invention In the first resetting voltage and the second resetting voltage it is unequal, it is therefore preferred that the embodiment of the present invention be suitable for timesharing to pixel drive The situation of dynamic circuit transmission difference resetting voltage.Certainly, display panel also can be set two above with reference to voltage signal line Lref, the first reset signal switch and the second reset signal switch respectively from different reference voltage signal line LrefConnection, thus First reset signal switch to pixel-driving circuit transmit the first resetting voltage process will not be switched with the second reset signal to The process that pixel-driving circuit transmits the second resetting voltage clashes.Therefore, the embodiment of the present invention is also applied for simultaneously to picture Plain driving circuit transmits the situation of different resetting voltages.
With continued reference to FIG. 3, the control terminal a1 of the first reset signal switch 4111 passes through the first scan line Sn-1It is swept with first Retouch the electrical connection of driving circuit 412, input terminal a2 is electrically connected with the first resetting voltage transmission line 416;Second reset signal switch 4112 control terminal b1 passes through the second scan line SaIt is electrically connected with the second scan drive circuit 414, input terminal b2 and second resets Voltage transmission line 418 is electrically connected.The embodiment of the present invention, it is preferable that the first reset signal switch and the first scan drive circuit position In the same side of display panel, the second reset signal switch is located at the same side of display panel with the second scan drive circuit.The One reset signal switch and the first reset signal voltage transmission line are located at the same side of display panel, the second reset signal switch and Second resetting voltage transmission line is located at the same side of display panel.In order to avoid the waste of unnecessary cabling, it is preferable that You Jifa All first reset signals, which switch, on light display panel shares a first reset signal voltage transmission line, and all second reset letter Number switch share a second reset signal voltage transmission line.
It should be noted that in the embodiment of the present invention, it is preferable that the first reset signal switch is located at the first turntable driving electricity Between road and pixel unit row, the second reset signal is switched between the second scan drive circuit and pixel unit row.
It should be noted that the first reset signal switch of reset signal converting unit is answered with second in the embodiment of the present invention Position signaling switch can be located at the same side of display panel;The not ipsilateral of display panel can also be located at.
With continued reference to Fig. 2 and Fig. 3, pixel-driving circuit 211 in addition to setting driving transistor and Organic Light Emitting Diode it It outside, further include first switch transistor T1, second switch transistor T2.The grid and the first scan line of first switch transistor T1 Sn-1A pole in electrical connection, source electrode or drain electrode is electrically connected with the output end a3 of the first reset signal switch 4111, source electrode or drain electrode In another pole with driving transistor grid be electrically connected.The grid of second switch transistor T2 and the second scan line SaIt is electrically connected It connects, the pole in source electrode or drain electrode is electrically connected with the output end b3 of the second reset signal switch 4112, another in source electrode or drain electrode One pole is electrically connected with the anode of Organic Light Emitting Diode.
The first reset signal switch is first film transistor in the embodiment of the present invention, the second reset signal switch is second Thin film transistor (TFT).Preferably, the type of first film transistor is consistent with the type of first switch transistor, the second film crystal The type of pipe is consistent with the type of second switch transistor.The control of the grid of first switch transistor and the first reset signal switch End processed is simultaneously by the first scan line Sn-1Control;The control terminal of the grid of second switch transistor and the second reset signal switch Simultaneously by the second scan line SaControl.Certainly, the type of first film transistor and the type of first switch transistor can also With inconsistent, the type of the second thin film transistor (TFT) and the type of second switch transistor can also be inconsistent, first switch crystal The grid of pipe can be electrically connected different scan lines, the grid of second switch transistor from the control terminal that the first reset signal switchs Different scan lines can also be electrically connected from the control terminal of the second reset signal switch, this is not limited by the present invention.
It is understood that the opening time of every row pixel unit is all different on display panel, every row pixel-driving circuit Resetting time it is also not identical.Therefore, the embodiment of the present invention, it is preferable that every row pixel unit is correspondingly arranged a reset signal Converting unit.Since a reset signal converting unit includes that the first reset signal switch and second reset signal are opened It closes, and the control terminal of the first reset signal switch is controlled by the first scan drive circuit, the control terminal of the second reset signal switch It is controlled by the second scan drive circuit.Therefore, the embodiment of the present invention, it is preferable that every row pixel unit is correspondingly arranged a reset While signal conversion unit, also need to be correspondingly arranged the second scan drive circuit of the first scan drive circuit of level-one and level-one.
Fig. 4 is the concrete structure schematic diagram of pixel-driving circuit shown in Fig. 2.Fig. 5 is pixel-driving circuit shown in Fig. 4 and answers The electric connection mode schematic diagram of position signal conversion unit.Difference with pixel-driving circuit shown in Fig. 2 is, pixel-driving circuit 211 other than including driving transistor DT, Organic Light Emitting Diode EL, first switch transistor T1, second switch transistor T2, It further include third switching transistor T3, the 4th switching transistor T4, the 5th switching transistor T5, the 6th switching transistor T6, electricity Hold Cst.Wherein, the electricity of first switch transistor T1, second switch transistor T2, driving transistor DT, Organic Light Emitting Diode EL Connection type is identical as Fig. 2.The grid and scan line S of first switch transistor T1n-1Electrical connection, the first pole and driving transistor The grid electrical connection of T3, the second pole are electrically connected with the first reset signal switch 4111;The grid and scan line of second transistor T2 SaElectrical connection, the first pole is electrically connected with the anode of Organic Light Emitting Diode EL, the second pole is electrically connected with reset signal switch 4112; The first pole of driving transistor DT is electrically connected with the second pole of third switching transistor T3, the second pole and the 6th transistor T6 the The electrical connection of one pole;The grid and scan line S of third switching transistor T3emitElectrical connection, the first pole and the first supply voltage PVDD Electrical connection;The grid of 4th switching transistor T4 and retouch line SnElectrical connection, the first pole be electrically connected with data line DL, the second pole and drive The first pole electrical connection of dynamic transistor DT;The grid and scan line S of 5th switching transistor T5nElectrical connection, the first pole and driving The grid electrical connection of transistor DT, the second pole are electrically connected with the second pole of driving transistor DT;The grid of 6th switching transistor T6 Pole and light emitting control line SemitElectrical connection, the first pole with drive the second pole of transistor DT to be electrically connected, the second pole and organic light emission The anode of diode EL is electrically connected;The cathode of Organic Light Emitting Diode EL is electrically connected with second source voltage PVEE.
Fig. 6 is the working timing figure of pixel-driving circuit shown in Fig. 5.The embodiment of the present invention switchs the first reset signal, Second reset signal switch, drives the type of transistor to be not construed as limiting at first switch transistor~the 6th switching transistor.It is preferred that Ground, the first reset signal switch, the second reset signal switch, first switch transistor~the 6th switching transistor, driving crystal The type of pipe is identical.Next it is opened with the first reset signal switch, the second reset signal switch, first switch transistor~6th Pass transistor, the course of work that the pixel-driving circuit is illustrated for driving transistor to be PMOS tube.
In the t1 stage, Sn-1For low level, Sa、SemitAnd SnIt is high level.Therefore, in t1 stage, the first reset signal Switch 4111, first switch transistor T1 be both turned on, and the first resetting voltage on the first resetting voltage transmission line 416 is connected First reset signal switch 4111 and first switch transistor T1 are transmitted to the grid of driving transistor DT, at this stage completion pair The grid of transistor is driven to reset.
In the t2 stage, SaFor low level, Sn-1、SemitAnd SnIt is high level.Therefore, in t2 stage, the second reset signal Switch 4112, second switch transistor T2 be both turned on, and the second resetting voltage on the second resetting voltage transmission line 418 is connected Second reset signal switch 4112 and second switch transistor T2 are transmitted to the anode of Organic Light Emitting Diode, complete at this stage The anode of Organic Light Emitting Diode is resetted.
In the t3 stage, Sn-1、Sa、SemitIt is high level, SnFor low level.Therefore, in the t3 stage, the 4th transistor T4, 5th transistor T5 conducting, while transistor DT being driven to be connected after the reset in t1 stage in the t3 stage.On data line DL Data voltage VdataThe 4th transistor T4, driving transistor DT, the 5th transistor T5 through being connected constantly are transmitted to driving The grid of transistor DT, until the grid voltage of driving transistor DT reaches Vdata+VthWhen, the t3 stage stops.That is, pixel driver Circuit completes compensation process at the t3 moment.
In the t4 stage, Sn-1、Sa、SnIt is high level, SemitFor low level.Therefore, in the t4 stage, third transistor T3, 6th transistor T6 conducting.Meanwhile transistor DT being driven to be connected after the compensation process by last moment, therefore, in t4 Stage, Organic Light Emitting Diode EL shine.
From above-mentioned analysis it is found that the embodiment of the present invention is resetted by setting reset signal converting unit at the t1 moment first The grid that first reset signal switch of the voltage through being connected is transmitted to the grid of driving transistor to complete driving transistor is initial Change, is transmitted to the anode of Organic Light Emitting Diode in second reset signal switch of the second resetting voltage of t2 moment through being connected with complete It is initialized at the anode of Organic Light Emitting Diode.Therefore, the embodiment of the present invention, which can satisfy, drives crystal in pixel-driving circuit Pipe and demand of the Organic Light Emitting Diode to different resetting voltages.
It should be noted that the embodiment of the present invention is not only applicable in timesharing to the grid and organic light-emitting diodes of driving transistor The pixel circuit of the anode initialization of pipe.When the first reset signal switch and the second reset signal switch respectively from different references Voltage signal line LrefWhen connection, the embodiment of the present invention is also applied for simultaneously to the grid and organic light-emitting diodes of driving transistor The pixel circuit of the anode initialization of pipe.
Fig. 7 is the side of electrical connection of another pixel-driving circuit and reset signal converting unit provided in an embodiment of the present invention Formula schematic diagram, Fig. 8 are corresponding driver' s timing schematic diagrames.Details are not described herein for the something in common of Fig. 7 and Fig. 5, and the main distinction exists In, the first reset signal switch and the second reset signal switch respectively from different reference voltage signal line LrefConnection: first is multiple Position signaling switch 4111 and reference voltage signal line Lref1Connection, the second reset signal switch 4112 and reference voltage signal line Lref2Connection.Therefore, the first reset signal switch to pixel-driving circuit transmit the first resetting voltage process will not be with second Reset signal is switched to be clashed to the process that pixel-driving circuit transmits the second resetting voltage, i.e., two reseting procedures can be same Shi Jinhang.Correspondingly, the driver' s timing for please referring to Fig. 8, in the t1 stage, Sn-1、SaFor low level, SemitAnd SnIt is high level. Therefore, in t1 stage, the first reset signal switch 4111, first switch transistor T1, the second reset signal switch 4112, second Switching transistor T2 is both turned on, first reset signal of the first resetting voltage on the first resetting voltage transmission line 416 through being connected Switch 4111 and first switch transistor T1 are transmitted to the grid of driving transistor DT, on the second resetting voltage transmission line 418 Second reset signal switch 4112 and second switch transistor T2 of second resetting voltage through being connected are transmitted to organic light-emitting diodes The anode of pipe is completed to reset the grid of driving transistor and reset the anode of Organic Light Emitting Diode at this stage.In t2 Stage, Sn-1、Sa、SemitIt is high level, SnFor low level, the 4th transistor T4, the 5th transistor T5 are connected, while driving crystalline substance Body pipe DT is connected after the reset in t1 stage in the t2 stage, the data voltage V on data line DLdataThe 4th through being connected is brilliant Body pipe T4, driving transistor DT, the 5th transistor T5 are constantly transmitted to the grid of driving transistor DT, until driving transistor The grid voltage of DT reaches Vdata+VthWhen, the t2 stage stops, and pixel-driving circuit completes compensation process at the t2 moment.In t3 rank Section, Sn-1、Sa、SnIt is high level, SemitFor low level.Third transistor T3, the 6th transistor T6 conducting, drive transistor DT It is connected after the compensation of last moment at this moment, therefore, in the t3 stage, Organic Light Emitting Diode EL shines.To sum up institute It states, driver' s timing shown in Fig. 8 and driver' s timing shown in fig. 6, the main distinction are that driver' s timing shown in Fig. 8 is in t1 rank Section has been completed at the same time the grid initialization of driving transistor and the anode of Organic Light Emitting Diode initializes, entire driver' s timing section Save for about 25% time.
It should be noted that the embodiment of the present invention, it is preferable that SnAnd Sn-1It is exported by the first scan drive circuit, and by Adjacent the first scan drive circuit of two-stage output, i.e. Sn-1It is swept by the previous stage first of adjacent the first scan drive circuit of two-stage Retouch driving circuit output, SnIt is exported by the first scan drive circuit of rear stage of adjacent the first scan drive circuit of two-stage.
It should be noted that display panel provided in an embodiment of the present invention also sets up multi-stage light emitting signal control in non-display area Circuit processed, for providing S to pixel-driving circuitemitSignal.
It should be noted that Fig. 5 and pixel-driving circuit shown in Fig. 7 only illustratively illustrate, do not constitute to this Invent the restriction of claimed pixel-driving circuit specific structure.
The embodiment of the present invention also provides a kind of driving method, for driving above-mentioned organic light emitting display panel.The driving side Method includes the first reseting stage and the second reseting stage, and in first reseting stage, first reset signal is switched to institute It states pixel-driving circuit and the first resetting voltage is provided, in second reseting stage, second reset signal is switched to described Pixel-driving circuit provides the second resetting voltage, and first resetting voltage is greater than second resetting voltage.Described first is multiple Position stage and second reseting stage can be mutually independent two stages in timing, can also be same in timing A stage.As shown in fig. 6, the first reseting stage (t1 moment) and the second reseting stage (t2 moment) are mutually indepedent in timing Two stages;As shown in figure 8, the first reseting stage (t1 moment) and the second reseting stage (t1 moment) are same in timing A stage.
The embodiment of the present application provides a kind of organic light emitting display panel and its driving method.Organic light emitting display panel packet Viewing area and non-display area are included, the viewing area includes multirow pixel unit, and pixel unit described in every row includes that multiple pixels are driven Dynamic circuit;The non-display area includes multiple reset signal converting units, multistage first scan drive circuit, the second scanning of multistage Driving circuit, the first resetting voltage transmission line and the second resetting voltage transmission line;Wherein, the reset signal converting unit includes First reset signal switch and the second reset signal switch;First reset signal switch is for the pixel-driving circuit First resetting voltage is provided;The second reset signal switch is for providing the second resetting voltage to the pixel-driving circuit; First resetting voltage is greater than second resetting voltage.
As shown in the above, technical solution provided by the embodiments of the present application can by the way that reset signal converting unit is arranged To provide different resetting voltages to driving transistor and Organic Light Emitting Diode, meet different components pair in pixel-driving circuit The demand of different resetting voltages improves display effect.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention Protection scope.

Claims (10)

1. a kind of organic light emitting display panel, comprising: viewing area and non-display area, the viewing area include multirow pixel unit, Pixel unit described in every row includes multiple pixel-driving circuits;The non-display area includes multiple reset signal converting units, more The first scan drive circuit of grade, multistage second scan drive circuit, the first resetting voltage transmission line and the transmission of the second resetting voltage Line;Wherein,
The reset signal converting unit includes the first reset signal switch and the second reset signal switch;The pixel driver electricity Road includes driving transistor, Organic Light Emitting Diode and the 6th switching transistor, the first pole of the 6th switching transistor with The second pole electrical connection of the driving transistor, the second pole are electrically connected with the anode of the Organic Light Emitting Diode, and described first Reset signal switch is for providing the first resetting voltage to the driving transistor;Second reset signal switch is for institute It states Organic Light Emitting Diode and the second resetting voltage is provided;First resetting voltage is greater than second resetting voltage;
The pixel-driving circuit is switched by reference to voltage signal line and first reset signal and described second resets letter Number switch electrical connection;
The first reset signal switch includes control terminal, input, output end, and the second reset signal switch includes control End, input, output end, wherein
The control terminal of the first reset signal switch is electrically connected with the first scan drive circuit, input terminal and described first resets The electrical connection of voltage transmission line, output end are electrically connected with the pixel-driving circuit;
The control terminal of the second reset signal switch is electrically connected with the second scan drive circuit, input terminal and described second resets The electrical connection of voltage transmission line, output end are electrically connected with the pixel-driving circuit.
2. organic light emitting display panel as described in claim 1, which is characterized in that the control of the first reset signal switch End is electrically connected by the first scan line with the first scan drive circuit;The control terminal of the second reset signal switch passes through second Scan line is electrically connected with the second scan drive circuit.
3. organic light emitting display panel as claimed in claim 2, which is characterized in that the first reset signal switch is first Thin film transistor (TFT), second reset signal switch are the second thin film transistor (TFT), and the pixel-driving circuit further includes first opening Close transistor, second switch transistor, the type one of the type of the first film transistor and the first switch transistor It causes, the type of second thin film transistor (TFT) is consistent with the type of the second switch transistor.
4. organic light emitting display panel as claimed in claim 3, which is characterized in that the grid of the first switch transistor with First scan line is electrically connected, and the pole in source electrode or drain electrode is electrically connected with the output end that first reset signal switchs, Another pole in source electrode or drain electrode is electrically connected with the grid of the driving transistor;
The grid of the second switch transistor is electrically connected with second scan line, source electrode or the pole in drain electrode and described the The anode electricity of the output end electrical connection of two reset signals switch, source electrode or another pole and the Organic Light Emitting Diode in drain electrode Connection.
5. organic light emitting display panel as described in claim 1, which is characterized in that first reset signal switch with it is described Second reset signal switch is located at the same side of the display panel.
6. organic light emitting display panel as described in claim 1, which is characterized in that first reset signal switch with it is described Second reset signal switch is located at the not ipsilateral of the display panel.
7. organic light emitting display panel as described in claim 1, which is characterized in that the first reset signal switch is located at institute It states between the first scan drive circuit and the pixel unit row, the second reset signal switch is located at second scanning and drives Between dynamic circuit and the pixel unit row.
8. a kind of driving method, for driving organic light emitting display panel as described in claim 1, which is characterized in that described Driving method includes the first reseting stage and the second reseting stage, and in first reseting stage, first reset signal is opened It closes and provides the first resetting voltage to the driving transistor by the reference voltage signal line;In second reseting stage, The second reset signal switch provides second to the Organic Light Emitting Diode by the reference voltage signal line and resets electricity Pressure.
9. driving method as claimed in claim 8, which is characterized in that first reseting stage and second reseting stage It is mutually independent two stages in timing.
10. driving method as claimed in claim 8, which is characterized in that first reseting stage and described second resets rank Section is the same stage in timing.
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